JP3672699B2 - Watering nozzle for fire extinguishing of fixed fire extinguishing equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a fire extinguishing water spray nozzle for a stationary fire extinguishing equipment used in a stationary fire extinguishing equipment such as a sprinkler fire extinguishing equipment. The present invention relates to a water spray nozzle for fire extinguishing that automatically closes the valve and automatically stops water spray.
[0002]
[Prior art]
Conventionally, as a water spray nozzle for fire extinguishing used in this type of sprinkler fire extinguishing equipment, water is dispersed by a deflector in order to spray water uniformly over the entire protection range. For example, as shown in FIG. (Japanese Patent Laid-Open No. 5-69730).
[0003]
FIG. 22 shows a fusible link-type fire-fusing sprinkler nozzle, a sprinkler port 202 is formed in the nozzle body 201, and a pair of levers 205 a and 205 b are placed between the plug 203 and the deflector 204 provided at the sprinkler port 202. Locked by 206a, 206b, and 206c, the stopper 203 is supported in a closed state. The lever 205a and lever 205b are fitted with a pair of links 208a and 208b fixed with a fusible alloy 207 as a heat sensitive body, and the plug 203 is kept closed.
[0004]
When the fusible alloy 207 is melted due to a temperature rise due to the occurrence of a fire, the pair of links 208a and 208b are disassembled as indicated by arrows, the latches of the levers 205a and 205b are released, and the levers 205a and 205b are flipped by water pressure, The stopper 203 is dropped from the sprinkling port 202, and pressurized water is ejected from the sprinkling port 202 to start sprinkling. At this time, the water spouted from the sprinkling port 202 hits the collector 204 and is uniformly sprinkled over the entire protection range.
[0005]
[Problems to be solved by the invention]
However, in such a conventional fire-extinguishing sprinkling nozzle, since it was a continuous radiation at a predetermined flow rate of, for example, 80 liters / minute or more per nozzle, a relatively large amount of fire-extinguishing liquid with respect to the fire-extinguishing capability. Or the amount of water is necessary, and naturally it is radiated to objects other than the object to be extinguished, so that there is a problem that a secondary disaster caused by the radiated fire extinguishing liquid or water, so-called water loss increases. In terms of equipment, there are problems that the water tank and the pump have a large capacity, the pipe size becomes large, and the cost of the whole equipment becomes high.
[0006]
Moreover, in the conventional watering nozzle, in order to spray water uniformly over the entire protection range, water is dispersed by a deflector to form water. Therefore, when there is a strong fire momentum, the dispersed water has a small particle size, so it will evaporate before reaching the depths of the fire by losing the fire air flow, it takes time to suppress the fire, and it cannot be extinguished at all Sometimes. For this reason, the amount of water increases and the damage caused by water loss increases.
[0007]
Furthermore, from a certain point in the protection range, even if the fire flame of one point is weakened momentarily by the granular water, the water once applied by the flame near that point evaporates, and again by the nearby flame Start to burn. For this reason, it takes time to extinguish completely.
In addition, the conventional sprinkler head seals the flow path connecting the water supply port of the head connection portion to the fire extinguishing pipe and the water spray port of the head tip with a heat sensitive material that can be melted by heat at the time of fire, such as a fusible alloy. When the temperature is higher than the temperature, the heat-sensitive material is melted to open the flow path, so that water is sprayed.
[0008]
  For this reason, once the flow path is opened by operating the sprinkler head in response to the thermal air current from the fire, the firefighting water supply from the water supply source will cease even after the fire is extinguished, or the staff will check the site and manually Water spraying continued until the valve was closed, and the damage caused by the water spray was great.
  Therefore, a sprinkler head that uses shape memory alloy, etc., opens the valve when the temperature rises due to fire and automatically sprinkles water for fire extinguishing, closes the valve when the temperature drops due to fire extinguishing and automatically stops sprinkling. Proposed. As such an automatic opening / closing type sprinkler head, for example, the one shown in FIG.flat5-123419).
[0009]
The sprinkler head of FIG. 23 is provided with a coil spring-like shape memory alloy 320 at the bottom of the main body 301. When the specified temperature is exceeded due to a fire, the shape memory alloy 320 restores the shape of the coil spring stored in advance and the spring 313 is restored. The pilot valve body 312 provided on the valve shaft 311 is pushed up to open the pilot valve hole 310. For this reason, the pressure in the upper chamber of the piston 308 is lowered, the piston 308 is raised, the rubber packing 314 is separated from the valve seat, and fire-extinguishing water is discharged from the water spout 316.
[0010]
When the fire is extinguished due to the discharge of fire-extinguishing water and the temperature decreases, the shape memory alloy 320 has a reduced restoring force to the memory shape, and is pushed by the spring 313 to push down the pilot valve body 312 and close the pilot valve hole 310. . For this reason, the piston 308 is pushed down by the pressure introduction of fire-extinguishing water from the pilot introduction hole 304, the rubber packing 314 is closed, and the water spray is automatically stopped.
[0011]
However, the automatic opening / closing type sprinkler head using such a shape memory alloy has a problem that it cannot be reliably operated by opening a valve at a predetermined specified temperature in the event of a fire.
FIG. 24 shows the elastic coefficient with respect to the temperature of the shape memory alloy, and the restoring force is proportional to the elastic coefficient. Shape memory alloys are in the martensitic phase crystalline state at low temperatures and transition to the austenitic crystalline state as the temperature increases, with a shape memory region known as the two-phase region in between. This shape memory area has a width of, for example, several tens of degrees or more in the temperature direction.
[0012]
In order to open the valve in the event of a fire using the shape memory alloy 320 having such characteristics, first, a prescribed operating temperature T1 is determined in order to start watering when a hot air current is received from the fire, and the operating temperature T1 is set to this operating temperature T1. The elastic coefficient G1 of the corresponding P point is obtained. When the elastic modulus G1 is obtained, the restoring force at the operating temperature T1 of the memory-shaped alloy 320 having a coil spring shape is determined, and the force of the spring 313 is set so that the pilot valve body 312 is opened by this restoring force.
[0013]
Then, the shape memory alloy 320 is deformed into an expanded memory shape while being heated to a specified operating temperature T1, and then returned to room temperature to be reduced to an initial shape before storage and incorporated as shown in FIG.
However, as shown in FIG. 24, the elastic modulus of the shape memory alloy gradually increases in the shape memory region as the temperature rises, and thus the restoring force to the memory shape gradually increases. On the other hand, the force for opening the pilot valve body 312 varies depending on the pressure of the water for fire extinguishing introduced into the piston chamber 309 and the sliding resistance of the valve shaft 311 in addition to the force of the spring 313, and has some variation. Yes.
[0014]
Therefore, even if the extended shape is stored in the shape memory alloy 320 at the specified operating temperature T1 and the specified restoring force is set, the restoring force gradually increases as the temperature rises, so that the pilot valve 312 is opened. When the force is reduced, watering starts at a temperature lower than the specified operating temperature T1, and when the opening force of the pilot valve 312 increases, watering starts at a temperature higher than the specified operating temperature T1. Will do.
[0015]
As a result, there is no guarantee that water spraying will start reliably upon reaching the specified operating temperature T1 due to the hot air flow received during a fire, and there is a problem that the operating temperature at which water spraying starts is not stable, and mass production will occur due to lack of reliability. It was extremely difficult.
In addition, when fire extinguishes the piston 308 and discharges the water for extinguishing from the water outlet 316, the water is sprinkled downward from the sprinkler head. The sprinkler head stops discharging even though the fire has not been extinguished.
[0016]
Furthermore, when an object collides with the sprinkler head and the lid 315 or the like is damaged, water for fire extinguishing is sprinkled and water loss occurs. Or the sprinkler head may not work during a fire. Alternatively, fire damage water may be sprinkled due to a collision with an object, resulting in water damage.
The present invention has been made in view of such problems, and while ensuring fire extinguishing capability, reducing the amount of radiation per one watering nozzle for fire extinguishing, reducing water loss, The capacity of the pump, etc. can be reduced to reduce the installation cost. Furthermore, the shape memory alloy can be used to open the valve accurately at the temperature determined at the time of fire and spray fire-fighting water. It aims at providing the watering nozzle for fire extinguishing of the fixed fire extinguishing equipment which adopted the automatic opening and closing type which was excellent in performance and mass productivity.
[0017]
[Means for Solving the Problems]
  In order to achieve this object, the present invention is configured as follows.
  The present inventionIt is installed above the protection area such as the ceiling surface.Targeted fire extinguishing water spray nozzles for fixed fire extinguishing equipment connected to a fire extinguishing pipe filled with pressurized fire extinguishing water and spraying pressurized fire extinguishing water.
  As such a fire-sprinkling water spray nozzle, in the present invention, a specific part within a predetermined protection range is used.Sprinkling intensively by forming a band-shaped spray pattern that connects the vicinity of the sprinkling nozzle installation position to the outer periphery of the protection area as a block of waterA swivelable nozzle part, a drive part for rotating a drive shaft using a water flow when spraying fire extinguishing liquid or water for fire extinguishing from the nozzle part, and input of rotation of the drive part according to a predetermined reduction ratioAt a speed that can maintain the shape of the spray patternAnd a speed reduction part that rotates the nozzle part and scans the spray pattern within a predetermined protection range to spray water throughout the predetermined protection range.
[0018]
  Furthermore, shape memory alloy and recovery biasing memberOpposedWhen the temperature is lower than the predetermined memory recovery temperature, the shape memory alloy is deformed to the initial shape by the recovery urging member and the valve mechanism is held at the sprinkling stop position, and when the memory recovery temperature is reached, the shape memory alloy A first heat-sensitive operating unit that makes the valve mechanism operable to the sprinkling position with a restoring force to the memory shape, and a predetermined watering start temperature higher than the memory recovery temperature are set, and when the temperature is lower than the watering start temperature, Regardless of the operating state of the first heat-sensitive operating part, the valve mechanism is kept closed, and when the watering start temperature is reached, it is decomposed by heat and the first heat-sensitive operating mechanism is released from the closed holding and water for fire extinguishing is sprinkled. And a second heat-sensitive operating part.
[0019]
  When the first heat-sensitive operating unit is lowered to a temperature lower than the memory recovery temperature during watering by the operation of the second heat-sensitive operating unit, the recovery mechanism biases the shape memory alloy into the initial shape by changing the shape memory alloy. Is operated in a closed state to stop watering.
  According to the fire watering nozzle of the present invention having such a configuration, it is within the protection range.specificPartA band-shaped spray pattern that connects the vicinity of the water spray nozzle installation position to the outer periphery of the protection area as a block of water is formed and sprayed intensively, and the speed is set to a speed that can maintain the shape of the band-shaped spray pattern.Since the scanning is performed within the protection range, a large amount of fire extinguishing liquid is radiated from a conventional watering nozzle instantaneously against a fire. Compared to the case of about 1 rpm with a rotation scan of 40 liters / minute, a higher fire extinguishing capability can be obtained despite a small amount of water in the entire protection range.
[0020]
Further, according to the present invention, the amount of water sprayed instantaneously increases, and at the same time, the striking force and particle diameter of water corresponding to the fire extinguishing target also increase, so that the fire extinguishing capability increases. That is, in the present invention, the water is not dispersed in granular form, but is sprayed on the fire extinguishing object as a mass of water with strong striking water that is intensively sprinkled on a specific part. The fire extinguishing ability becomes high by reaching the deep part of the water, and the time until fire suppression is short, so the amount of water until fire extinguishing is small. Moreover, since the fire is extinguished with water in a lump state, it is possible to suppress the part that has been extinguished once again from burning, and the fire extinguished place can be continuously put into a fire extinguisher state.
[0021]
In addition, since the fire can be extinguished with a small amount of radiation, so-called water damage damage can be reduced. Furthermore, the irradiating water tank is reduced, the pump is reduced in capacity, backup equipment such as private power generation facilities is also reduced in capacity, and the piping size is reduced, resulting in lower costs.
In addition, even when the protection range is increased compared to conventional watering nozzles, by adjusting the scanning time, a large amount of water can be radiated instantaneously against a fire, and the fire extinguishing performance is equivalent or better. Therefore, the number of nozzles installed can be reduced as compared with a conventional watering nozzle.
[0022]
In addition, in the fire-sprinkling nozzle of the present invention, when receiving a hot air flow due to a fire, when the memory recovery temperature set at a low level is reached, a restoring force is generated in which the shape memory alloy is deformed into a memory shape, The first heat-sensitive operating unit is operated to make the valve mechanism in a water sprayable state. In this state, when the temperature due to the hot air flow further rises and reaches the specified watering start temperature, the second heat-sensitive operating part using a fusible alloy, a glass bulb, etc. is decomposed by heat and has already been operated in a state where watering is possible. Watering can be started by releasing the holding of the first heat-sensitive operating part.
[0023]
For this reason, even if there is a range in the memory recovery temperature of the shape memory alloy, the watering start temperature can be guaranteed by setting it to the specified temperature with a fusible metal or glass valve provided as a heat sensitive material in the second heat sensitive operating part. The reliability of an automatic open / close fire watering nozzle using shape memory alloy is ensured and mass production is possible.
In addition, since water spraying is started only when both the first and second heat-sensitive operating parts work, even if, for example, the object is struck and damaged during monitoring, both of them are brought into operation due to damage. It is almost impossible to cause water spraying and can reliably prevent water spraying due to breakage. Moreover, even if one of them breaks, it can always operate in the event of a fire due to the other function.
[0024]
In addition, when the fire due to watering is extinguished and the temperature drops, the shape memory alloy is deformed to the initial shape by the recovery biasing member, and the valve mechanism of the first heat sensitive operation part is closed, and watering is automatically stopped. In addition, water loss after fire extinguishing can be minimized. In addition, the temperature for stopping watering is the shape recovery temperature set lower than the watering start temperature set in the second heat-sensitive operating mechanism. By sufficiently lowering the watering stop temperature, recurrence after fire extinguishing The possibility of fire can be greatly reduced.
[0025]
When the first heat-sensitive operating part deforms the shape memory alloy to the initial shape due to the temperature drop due to watering and stops watering, and reaches the memory recovery temperature again, the valve is operated with the restoring force to the memory shape of the shape memory alloy. Actuate the mechanism to the watering position to re-water. For this reason, even in the event that the fire burns up again after stopping watering, re-watering is automatically performed and the fire can be reliably extinguished.
[0026]
The first heat-sensitive operating unit has a plurality of shape memory alloys arranged around the second heat-sensitive operating unit, and the valve mechanism is sprinkled with a restoring force when at least one of the plurality of shape memory alloys is activated upon reaching the memory recovery temperature. Operable to position. By arranging a plurality of shape memory alloys in this way, a temperature difference due to the direction of the hot air flow at the time of a fire is eliminated, and a watering operation can be performed reliably.
[0027]
Further, when all of the plurality of shape memory alloys are restored to the initial shape, the valve mechanism is operated in a closed state to stop watering. For this reason, as long as the thermal airflow is received from the surrounding direction, watering is not stopped and it can extinguish reliably.
In addition, the shape memory alloy is disposed above the position of the nozzle portion that is exposed downward when the second sensing unit is actuated, so that the shape memory alloy is cooled by the fire-extinguishing water itself to prevent water discharge stop before quenching. In addition, it is possible to prevent malfunction caused by blocking the hot air flow toward the shape memory alloy with water for fire extinguishing.
[0028]
The shape memory alloy used for the first heat-sensitive operating part has a coil spring shape contracted in the axial direction as an initial shape, and is deformed into a coil spring shape extended in the axial direction upon reaching the memory recovery temperature.
Further, the second heat-sensitive operating unit includes a soluble alloy or a glass valve that is decomposed and separated by heat when the watering start temperature is reached, thereby enabling the watering start temperature to be accurately set.
[0029]
In addition to this, for example, shape memory alloy using NiTi alloy has high corrosion resistance as a material characteristic, and furthermore, it does not rely on the fire detection signal from the fire detector for the start and stop of watering. There is no problem of water sprinkling due to sensor malfunction, and it is highly reliable.
Furthermore, in the present invention, the nozzle portion is divided into a plurality of members on a surface passing through the arrangement portion of the slit holes, and a plurality of grooves for forming the slit holes are formed and combined on the combination surface of each divided member. Therefore, it is possible to easily process and form a plurality of slit holes arranged in an arbitrary radial direction on the outer peripheral surface of the nozzle portion, and to set the spray pattern from the nozzle to the protection area to an arbitrary shape, width and position as necessary. Can be free.
[0030]
Here, the nozzle part is a cylindrical body whose tip is narrowed into a conical shape, and the cylindrical body is divided into a plurality of members, and a straight groove that forms a slit hole in one of the combination surfaces of the divided members is flowed into the inside. A unique radiation angle is set from the road toward the outer peripheral surface to communicate with each other.
Further, in the case of a fire extinguishing water spray nozzle that automatically opens and closes the valve body by the first and second heat sensitive operation parts, a drive part, a speed reduction part, and a nozzle part are sequentially arranged from the inflow path side with respect to the nozzle body, The nozzle part is connected through a slide connecting part that is slidable in the axial direction and rotates integrally around the axis, and the drive part rotates through the speed reduction part while the nozzle part is slid when the thermal operation mechanism is disassembled. To communicate.
[0031]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a sectional view of an embodiment of a watering nozzle for fire extinguishing of a fixed fire extinguishing equipment according to the present invention, and FIG. 2 shows a half end view seen from the lower side.
In FIG. 1, a fire-sprinkling water spray nozzle 1 of the present invention has a connection screw portion 3 connected to a water supply pipe that pressurizes and supplies a fire-extinguishing liquid or fire-extinguishing water to an upper portion of a nozzle body 2. The nozzle body 2 is composed of a cylindrical member in which cases 2a, 2b, 2c and 2d are sequentially screwed from above.
[0032]
In the nozzle body 2, the shape of the shape memory alloys 120A and 120B disposed around the case 2c on the distal end side is set in a state in which the valve piston 100 can be opened by the restoring force when the predetermined memory recovery temperature T1 is reached. A first heat sensitive operation part 124 is provided. Further, at the front end side of the nozzle body 2, the closure of the spool valve 11, which is a valve mechanism, is released by melting the soluble alloy 47 at the watering start temperature T <b> 2 set higher than the memory recovery sensitivity T <b> 1 of the shape memory alloys 120 </ b> A and 120 </ b> B. Then, a second heat-sensitive operation unit 125 that sprays water is provided.
[0033]
An inflow path 5 through which pressurized fire extinguishing liquid or fire extinguishing water flows is formed in the connection screw part 3 at the upper part of the nozzle body 2, and the spool hole 5 a at the back of the inflow path 5 is integrated with the tip of the shaft 12. The spool valve 11 formed in the above is arranged in a steady monitoring state, and the inflow passage 5 is closed. The O-ring attached to the spool valve 11 is made of fluoro rubber.
Following the inflow path 5 closed by the spool valve 11, a drive unit 6 is provided. On the inflow side of the drive unit 6, a strainer 21 for removing dust mixed in the fire extinguishing water is disposed. The drive unit 6 forms a plurality of impellers 6a integrally with a casing 6b rotatably supported on the outside of a bearing 17 mounted on a housing 16 screwed and fixed inside the case 2a, and opens the spool valve 11. The casing 6b can be rotated by receiving the water flow flowing in from the inflow path 5 by the impeller 6a.
[0034]
A deceleration unit 7 is provided inside the drive unit 6. In this embodiment, the speed reduction unit 7 is provided with a double planetary gear mechanism. That is, the sun gear 18a is fixed to the housing 15 through which the shaft 12 of the spool valve 11 is passed and fixed to the housing 16 of the case 2b, and the planetary gear 19 is engaged with the outside of the sun gear 18a. 6 is engaged with an internal gear 21 fixed to the casing 6b. The planetary gear 19 is rotatably mounted on the carrier case 20 by a screw shaft.
[0035]
Subsequently, the sun gear 18b is fixed to the outside of the housing 15 similarly to the sun gear 18a, the planetary gear 22 is engaged with the sun gear 18b, and the internal gear 23 fixed to the carrier case 20 is engaged with the planetary gear 22.
The planetary gear 22 is connected to the carrier case 24 by a screw shaft, and the carrier case 24 serves as an output unit that extracts the reduced output rotation of the double planetary gear mechanism. A lower end of the carrier case 24 serving as an output part of the reduced speed rotation extends below the nozzle body 2 as shown by a broken line and integrally forms a fixed guide 25.
[0036]
FIG. 3 shows the double planetary gear mechanism provided in the speed reduction unit 7 of FIG. In this double planetary gear mechanism, the sun gear 18a is fixed, and the rotation of the drive unit 6 is input by the internal gear 21 through the planetary gear 19 meshed with the sun gear 18a. The planetary gear 19 is rotatably mounted on the carrier case 20, and the carrier case 20 transmits the rotation to the second-stage internal gear 23.
[0037]
A planetary gear 22 is provided inside the internal gear 23 and meshes with a fixed sun gear 18b in the same manner as the sun gear 18a. The planetary gear 22 is rotatably mounted on a carrier case 24, and the carrier case 24 takes out the output rotation obtained by reducing the input rotation of the drive unit 6 to the outside.
Referring again to FIG. 1, the lower end of the shaft 12 having the spool valve 11 at the upper portion is taken out downward through the housing 15 in which the speed reduction portion 7 is mounted, and a retainer 34 is attached to the tip by a set screw 35. The spring 30 is assembled between the stopper member 29 on the carrier case 24 side. The spring 30 is compressed in the state shown in the figure, and urges the retainer 34 side downward against the stopper member 29.
[0038]
Following the speed reduction unit 7 provided inside the drive unit 6, a nozzle unit 8 is provided. The nozzle portion 8 is a cylindrical body whose tip is narrowed down to a trapezoidal cone. In this embodiment, the nozzle portion 8 has a divided structure in which the first member 8A, the second member 8B, and the third member 8C are combined.
The first member 8A having a flange portion formed on the upper side of the nozzle portion 8 has a tetrafluoroethylene sheet 32 (hereinafter referred to as “sheet 32”) mounted in a groove formed on the upper outer peripheral surface. The surface opposite to the mounting surface is a stopper surface 36. When the second heat-sensitive operation part 125 falls off due to thermal decomposition and the nozzle part 8 descends, the sheet 32 comes into contact with the sheet crimping step part 33 on the upper inner edge of the lower case 2d and falls from the space around the nozzle part 8. Prevent water from leaking to the side.
[0039]
In addition, a stopper ball 37 is incorporated following the sheet crimping step portion 33, and when the nozzle portion 8 is lowered, the stopper surface 36 located on the lower side of the upper collar comes into contact with the stopper ball 37 to prevent the stopper ball 37 from coming off. Is done. The nozzle portion 8 includes a guide portion that passes through a fixed guide portion 25 extending from the carrier case 24 to which the reduced speed rotation of the speed reduction portion 7 is output, as indicated by a broken line, and a second heat sensitive operation portion 125 is provided. When actuated, the spring 30 descends along the fixed guide 25 due to the pressure and weight of the spring 30, and the nozzle portion 8 protrudes outward from the lower end of the case 2 d at the bottom of the nozzle body 2.
[0040]
The nozzle portion 8 having a structure in which the first member 8A, the second member 8B, and the third member 8C are combined has a plurality of slit holes 10 opened in the combination surface of the members along the axial direction.
The second heat-sensitive operation unit 125 supports a support plate 42 that holds the nozzle unit 8 in the illustrated storage position with a pusher plate 43 that is assembled to the lower side via a lock ball 38, and the pusher plate 43 has a central portion. The heat collecting plate 44 is supported via a heat insulating material 40, and the heat collecting plate 44 is fixed to a mounting flange 48 with a screw hole by a soluble alloy 47 that melts at a predetermined water spray start temperature T2.
[0041]
The mounting flange 48 is screwed and fixed to a screw portion 49 that extends from the lower center of the pusher plate 43. Further, two heat collecting plates 45 and 46 are assembled on the upper side of the heat collecting plate 44.
In the second heat-sensitive operation unit 125, when the heat from the fire rises to a predetermined watering start temperature T2, the fusible alloy 47 is melted, and the pusher plate 43 supporting the lock ball 38 is loosened to loosen the lock ball. 38 is released and the support plate 42 is also dropped together with the pressure plate 43, the holding of the nozzle portion 8 is released, and it protrudes downward as shown in the left half section of FIG.
[0042]
That is, when the second heat-sensitive operation part 125 is activated by thermal decomposition, the nozzle part 8 projects to the lower part of the nozzle body 2 as shown in the figure by the force of the spring 30 and the weight of the nozzle part 8, and at the same time, the shaft 12 is also lowered and spooled. The valve 11 leaves the spool hole 5a and opens the inflow path 5 that has been closed. For this reason, pressurized fire-fighting water from a water supply pipe (not shown) connected to the connection screw part 3 side flows into the periphery of the drive part 6 through the inflow path 5, and the rotational force is caused by the water flow through the impeller 6 a. And the housing 6b rotates.
[0043]
The rotation of the drive unit 6 is decelerated by the decelerating unit 7 provided inside, and the decelerated rotation is transmitted to the fixed guide unit 25 extending from the carrier case 24. At this time, the nozzle portion 8 is located at the position of the left half section that is lowered downward along the fixed guide 25, and receives the reduced rotation of the carrier case 24 of the reduction portion 7 through the fixed guide 25, for example, the amount of water is 40 If it is 1 liter / minute, it is decelerated and rotated at about 1 rpm.
[0044]
The water flow that has passed through the drive unit 6 flows into the nozzle unit 8 from the portion of the fixed guide 25, and is sprinkled to the outside through the slit hole 10 that is opened by forming a linear groove outward from the center.
FIG. 4 is an exploded view of the nozzle portion 8 provided in the fire-fighting watering nozzle 1 of the present invention shown in FIG. The nozzle portion 8 of the present invention includes a first member 8A serving as a nozzle portion body located at the center, a pair of second members 8B and a second member 8B assembled from both sides to a lower cavity portion of the first member 8A. It is comprised by a pair of 3rd member 8C assembled | attached to the outer side, and is fixed with the nut 73 of the volt | bolt 72. As shown in FIG.
[0045]
5 is an explanatory view of the first member 8A of FIG. 4, FIG. 5 (A) is a plan view, FIG. 5 (B) is a front half sectional view, FIG. 5 (C) is a side half sectional view, and FIG. D) is a bottom view. 5A and 5D show one side of the center line because it has a symmetrical structure.
For example, as is apparent from FIG. 5B, the first member 8 </ b> A has a disk-like flange portion 50 formed on the upper portion, and a sheet fitting groove 56 formed on the outer surface of the upper surface of the flange portion 50. . The sheet 32 is mounted in the sheet fitting groove 56 as shown in FIG. A substantially U-shaped support arm 51 is integrally formed on the lower side of the flange portion 50 via a cylindrical portion 57.
[0046]
Inside the cylindrical portion 57 is formed a slide groove 52 in which the fixed guide 25 extending from the carrier case 24 of the speed reduction portion 7 shown in FIG. The support arm 51 provided in the lower part has a positioning projection 54 formed at the tip, and a receiving hole 55 is formed on the lower side thereof. The receiving hole 55 has a support plate 42 provided in the heat-sensitive operating mechanism 4 of FIG. The projection at the center is fitted.
[0047]
The slide groove 52 formed on the inner side of the cylindrical portion 57 is opened in a fan shape as apparent from the plan view of FIG. 5A, and this portion has an arcuate cross section extending from the carrier case 24 of FIG. The fixed guide member 25 is located.
FIG. 6 shows an assembly assembly of the second member 8B and the third member 8C assembled on both sides of the support arm 51 of the first member 8A shown in FIG. As apparent from this assembly assembly, in the present invention, the first member 8A, the second member 8B, and the third member 8C are divided along the arrangement direction of the slit holes formed in the nozzle portion 8. Basic. For this reason, the slit hole 10 can be formed by groove-growing from the inner inflow path to the outer side on the combined surface of each divided member.
[0048]
FIG. 7 is an explanatory diagram of the second member 8B in the assembly assembly of FIG. Here, FIG. 7A is a front view seen from the inside, FIG. 7B is a sectional view taken along line XX, FIG. 7C is a rear view seen from the outside, FIG. 7D is a plan view, FIG. 7E is a bottom view.
Such a second member 8 </ b> B has a plurality of linear grooves that form the slit holes 10 in the inner combination surface 60 in a predetermined direction. Since the slit hole 10 can be formed by forming the straight groove on the combined surface 60 as described above, the opening and direction of the slit hole 10 can be freely formed by simple straight groove processing.
[0049]
As is apparent from the XX cross section of FIG. 7B, an eaves part 63 extends above the second member 8B, and the lower side of the eaves part 63 is cut away to provide a third portion shown in FIG. The member combination surface 62 is formed. An inflow passage 65 is formed inside the second member 8B, and a positioning recess 61 that fits in the positioning projection 54 on the support arm 51 side of the first member 8A shown in FIG. Forming. Further, as shown in FIG. 7C, an opening 64 that opens to the inner inflow passage 65 is formed by processing the mating surface 62 for assembling the third member 8C of FIG. 8 on the outer peripheral side. Yes.
[0050]
  FIG. 8 is an explanatory view of the third member 8C of FIG. 8A is a front view seen from the inside, FIG. 8B is a YY sectional view, FIG. 8C is a rear view seen from the outside, and FIG. 8D is FIG. 8B is a front view of the left combination surface 70b, FIG. 8E is a side view of FIG. 8A on the combination surface 70b side, FIG. 8F is a plan view, and FIG.G) Is a bottom view.
[0051]
The third member 8C has a fan shape when seen in a plan view, and a plurality of linear members are formed in each of the inner combination surfaces 70a and 70b in a predetermined watering direction as shown in FIG. The slit hole 10 is formed. As is apparent from the side view of the combination surface 70b in FIG. 8E, the slit hole 10 has a slit having an arbitrary size and direction by processing a linear groove at an arbitrary radiation angle from the center toward the outer side. 10 can be easily formed.
[0052]
Further, the third member 8C has bolt through holes 71 formed at two locations from the outside. As shown in FIG. 4, the first member is interposed between the third member 8C located on both sides by bolts 72 and nuts 73. The assembly structure of the nozzle portion 8 as shown in FIG. 1 can be obtained by arranging and assembling the second member 8B on both sides centering on 8A. According to the nozzle portion 8 that is an assembly of the first member 8A, the second member 8B, and the third member 8C, the arrangement of the slit holes 10 that are arranged in the axial direction toward the six surrounding locations when seen from the plane. Is formed.
[0053]
Next, the first heat sensitive operation part 124 provided in the nozzle body 2 of FIG. 1 will be described. The first heat-sensitive operation unit 124 includes the valve piston 100 (valve mechanism), pilot valves 112A and 112B, recovery springs (recovery urging members) 117A and 117B, and shape memory alloys 120A and 120B.
First, the valve piston 100 is disposed on the secondary side of the spool valve 11 provided in the spool hole 5a. That is, the outer periphery of the diaphragm 102a is fitted to the upper inner periphery of the cylindrical valve body 101, and the inner side of the diaphragm 102b is fixed to the outer side of the spool hole 5a by screwing the holder 106. The inner periphery of the diaphragm 102b is fitted to the lower outer periphery of the valve body 101, and the outer periphery of the diaphragm 102b is fixed to the case 2b side.
[0054]
A valve seat 103 is fixed to the lower end portion of the valve body 101 with a screw, and the inlet of the communication hole 104 formed in the axial direction of the housing 16 mounted in the case 2b of the nozzle body 2 is closed. The valve body 101 includes a spring 105 and urges the valve seat 103 in the closing direction.
For the diaphragm chamber of the valve piston 100 in which the spring 105 is housed, two pilot valves 112A and 112B built in the lower part of the peripheral wall of the nozzle body 2 are provided. The pilot valves 112A and 112B house the pilot valve body 112a in the pilot valve chamber 112b, and take out the valve shaft 115a downward from the lower part of the pilot valve body 112a.
[0055]
The diaphragm chamber of the valve piston 100 in which the spring 105 is housed is configured such that when the spool valve 11 is opened by the operation of the second heat sensing unit 124, the pilot pressure by the pressure-extinguishing water passing through the spool hole 5a is supplied to the left pilot valve 112A. From the right pilot valve 112B, the valve body 101 is moved upward against the spring 105 as shown in the left half section, and the communication hole 104 of the housing 16 is opened.
[0056]
The flow path for supplying the pilot pressure is formed by a gap between the outer peripheral side and the inner peripheral side of the spacer 108 with the spacer 108 disposed between the case 2d and the case 2d inside the case 2b. First, at the upper part of the left pilot valve 112A, the pilot valve 112A of the pilot valve 112A formed in the valve ring 114 by the pilot flow path 110a on the inner peripheral side of the spacer 108 formed in the pilot groove 110b of the spacer ring 113 and its pilot hole 110c. It communicates with the chamber 112b. Here, the pilot flow path 110 a communicates with the secondary side of the valve piston 100 through a pilot hole 107 formed in the axial direction of the housing 16.
[0057]
  The pilot valve chamber 112b of the pilot valve 112A has a pilot groove on the lower end surface of the valve ring 114, as is apparent from the spacer ring 113 and the valve ring 114 taken out in FIG.110From d to the pilot groove 110f on the lower end surface of the spacer ring 113 positioned at the upper part through the axial through hole 110e, and communicates with the pilot valve chamber 112b of the right pilot valve 112B through the pilot hole 110g.
[0058]
The pilot valve chamber 112b of the right pilot valve 112B passes through the pilot groove 110i on the outer periphery of the spacer 108 in FIG. 1 from the side pilot hole 110h, and the diaphragm of the valve piston 100 that houses the spring 105 by the pilot hole 110j of the case 2a. It communicates with the room.
A valve support member 115 is disposed below the pilot valve body 112a of the pilot valves 112A and 112B, and a pilot discharge passage 116 is formed inwardly from the storage portion of the valve support member 115 to which the cover 118 is attached.
[0059]
Here, the reason why the pilot discharge path 116 is opened to the inside of the head is that the fire-extinguishing water discharged from the pilot discharge path 116 due to the discharge of the pilot pressure by the operation of the pilot valves 112A and 112B is arranged on the outer periphery of the lower portion of the head. This is because the shape memory alloys 120A and 120B are applied to prevent the heating temperature by the hot airflow from being directly cooled by the water for fire extinguishing.
[0060]
The recovery springs (recovery urging members) 117A and 117B and the shape memory alloys 120A and 120B are disposed below the pilot valves 112A and 112B so as to press each other via the retainer 119 therebetween. Is supported by the mounting of the retainer 121.
In this embodiment, the shape memory alloys 120 </ b> A and 120 </ b> B have a shape wound in a coil spring shape, and are incorporated in two places around the case 2 c below the head body 2. As the shape memory alloys 120A and 120B, for example, unidirectional ones having high corrosion resistance using a NiTi alloy or the like are used. Here, the unidirectionality of the shape memory alloy means that a certain shape is memorized at a predetermined memory recovery temperature, then deformed to an initial shape at a low temperature, and then heated to a memory recovery temperature above the transformation point, to a memorized shape. However, it means that even if the temperature is lowered again, the initial shape deformed at a low temperature is not obtained.
[0061]
In such unidirectional shape memory alloys 120A and 120B, a restored shape obtained by extending the coil spring in the axial direction at a predetermined memory recovery temperature T1 is stored, and the shape memory alloy 120B of the right half cross section is returned to a low temperature. As shown in the figure, the initial shape is reduced and incorporated between the retainers 119 and 121.
The restoring force F1 due to the initial shape of the shape memory alloys 120A and 120B in the low temperature state is sufficiently lower than the restoring force F2 of the restoration springs 117A and 117B incorporated on the pilot valves 112A and 112B side, and the restoration springs 117A and 117B The initial shape is maintained like the shape memory alloy 120B of the right half cross section under the pressure by the restoring force F2.
Since the initial shape is similar to that of the shape memory alloy 120B at low temperatures, the pilot valve body 112a is held at the position where the pilot discharge passage 116 is closed as shown in the figure by the restoring force F2 of the restoration spring 117B. Yes. However, since the spool valve 11 is closed, the pilot pressure is not supplied to the valve piston 100 via the pilot valves 112A and 112B, and the valve body 101 is caused by the force of the spring 105 to have the valve seat 103 as shown in the right half section. The communication hole 104 is closed.
[0062]
  On the other hand, the sprinkler head 1 receives the thermal airflow from the fire.Nozzle part 8When the shape memory alloys 112A and 112B incorporated in the periphery of the metal are heated, the restoring force F1 to return to the memory shape increases, and when the restoring force F2 of the restoring springs 117A and 117B is exceeded, the valve shaft 115a causes the left half. As shown in the cross section, the pilot valve body 112a is pushed upward to open the pilot discharge passage 116 for the pilot valve chamber 112b and simultaneously close the upper pilot hole 110g.
[0063]
  For this reason, the diaphragm chamber of the valve piston 100 is opened to the atmosphere through the pilot discharge passage 116. In this state, when the fusible alloy 47 of the second heat-sensitive operating unit 125 is melted by heat from the fire and the holding of the valve shaft 12 is released by separation and dropping, the spool valve 11 is pulled out from the spool hole 5a with pressurized fire-extinguishing water. Opening the flow path, the first heat sensitive operating part at a lower shape memory temperature124Since the valve body 101 of the valve piston 100 is already openable, the pressure-extinguishing water from the inflow passage 5 hits the diaphragms 102a and 102b, pushes up the valve body 101 and separates the valve seat 103 from the communication hole 104. A rotational force is applied by passing through the communication hole 104, passing through the impeller 6 a of the drive unit 6, finally being supplied to the head unit 8, and being sprinkled with the turning of the head unit 8.
[0064]
Here, the recovery temperature of the shape memory alloys 120A and 120B that creates the openable state of the valve piston 100 by the operation of the pilot valves 112A and 112B provided in the first heat-sensitive operating unit 124 is T1, and the second heat-sensitive operating unit 125 is operated. When the watering start temperature determined by the melting temperature of the fusible alloy 47 is T2, the memory recovery temperature T1 of the shape memory alloys 120A and 120B is set lower than the watering start temperature T2.
[0065]
For this reason, when receiving a hot air flow due to a fire, the shape memory alloys 120A and 120B first rise to the memory recovery temperature T1, and the valve piston 100 is made openable by the operation of the pilot valves 112A and 112B. When the fusible alloy 47 is melted when the sprinkling start temperature T2 is reached by the hot air flow, the holding of the spool valve 11 is released via the valve shaft 12 by the second heat-sensitive operation unit 124, and water sprinkling is started.
[0066]
The sprinkling start temperature T2 of the fusible alloy 47 at which the sprinkling is started is accurately determined by the material of the fusible alloy 47, and the memory recovery temperature T1 of the shape memory alloys 120A and 120B is the operation before the start of sprinkling. Therefore, even if the restoring force of the shape memory alloys 120A and 120B has a width with respect to the temperature rise, the water spray is surely performed at the predetermined water spray start temperature T2 determined by the material of the soluble alloy 47 without being affected by this. It can be carried out.
[0067]
FIG. 10 shows measured characteristics of the elastic modulus G with respect to the temperature T of the shape memory alloys 120A and 120B having a coil spring shape provided in the fire-fusing sprinkling nozzle 1 of FIG. For example, when the watering start temperature T2 determined by the soluble alloy 47 of the second heat-sensitive operation unit 125 is T2 = 74 ° C., the operating temperature range of the pilot valves 112A and 112B by the restoring force of the shape memory alloy is, for example, T1 = 30-60 ° C. For example, T1 = 50 ° C.
[0068]
More specifically, the pilot valve body 112a closes the pilot discharge passage 116 in balance with the restoring force F1 of the shape memory alloys 120A and 120B based on the elastic modulus G50 when the temperature T1 = 50 ° C. in FIG. The restoring force F2 of the recovery springs 117A and 117B is determined so as to be in a position to be performed. That is, the restoring force F2 of the restoring springs 117A and 117B is set equal to or slightly larger than the restoring force F1 of the shape memory alloys 120A and 120B.
[0069]
As a result, when the temperature of the shape memory alloys 120A and 120B reaches T1 = 50 ° C., the restoring force F1 overcomes the restoring force F2 of the restoration spring 117 to push up the pilot valve body 112a and simultaneously close the pilot holes 110c and 110g. Thus, the pilot pressure from the diaphragm chamber of the valve piston 100 is discharged. If one of the plurality of shape memory alloys 120 provided on the outer periphery of the case 2c reaches the shape recovery temperature T1, the pilot valve body 112a is raised to a water dischargeable state. Thereby, delay of temperature detection due to the influence of the airflow is prevented, and the fire temperature is reliably detected regardless of the direction of the hot airflow, and water discharge is performed.
[0070]
In addition, the plurality of shape memory alloys 120 arranged around the second heat-sensitive operation unit 125 are lowered to a predetermined position when the second heat-sensitive operation unit 125 is operated, and the exposed position of the nozzle unit 8 that sprinkles fire-extinguishing water around it. It is located above. Therefore, since the shape memory alloy 120 is not cooled by the fire-fighting water to be discharged, and the passage of the hot air flow toward the shape memory alloy 120 is further provided between the ceiling surface and the nozzle portion 8, the ambient heat can be accurately measured. This prevents malfunctions such as stopping water discharge before extinguishing the fire.
[0071]
Next, a heat-sensitive operation when receiving a hot air flow due to the fire of the embodiment of FIG. 1 will be described with reference to FIG. FIG. 11 is a graph showing the operation of each part at the temperature around the fire-sprinkling watering nozzle 1. Curve a represents a temperature curve immediately above the fire source, and curve b represents an ambient temperature curve in the fire-sprinkling nozzle 1 disposed away from just above the fire source.
[0072]
At a low temperature that is in a steady monitoring state, the restoring force F2 of the recovery springs 117A and 117B is larger than the restoring force F1 at the steady temperature of the shape memory alloys 120A and 120B provided in the first heat sensitive operation unit 124. Like the shape memory alloy 120A in the right half cross section of FIG. Therefore, the pilot valves 112A and 112B are held at the valve positions where the communication with the pilot discharge passage 116 is closed by the pilot valve body 112a.
[0073]
FIG. 12 is a schematic diagram of the operating state of the pilot valves 112A and 112B in the steady monitoring state. The pilot hole 110c on the water supply side is communicated with the pilot hole 110h reaching the diaphragm chamber of the valve piston 100. Since is closed, pilot pressure is not supplied by inflow of pressurized fire-fighting water.
In this state, when receiving a hot air current due to a fire, the shape memory alloys 120A and 120B overcome the restoring force F2 of the recovery springs 117A and 117B when the shape memory alloys 120A and 120B reach a predetermined memory recovery temperature T1 where shape memory has been performed. The pilot valve body 112a is pushed up by the valve shaft 115a, and the pilot flow path on the water supply side is closed as shown in FIG. 13 and at the same time, the valve chamber of the valve piston 100 is opened to the pilot discharge path 116. However, at this time, the second heat sensitive operation unit 125 is not operated, and the valve shaft 12 holds the spool valve body 11 in the closed state located in the spool hole 5a, so that the supply of pressurized fire-extinguishing water is not performed. Absent.
[0074]
  As described above, when the temperature due to the hot air flow due to the fire further rises in a state where the first heat-sensitive operation unit 124 is operated and rises to the sprinkling start temperature T2 at which the soluble alloy 47 of the second heat-sensitive operation unit 125 melts, the soluble alloy 47 Melted rock ball38The lock due to is released, and the members of the thermal operation mechanism are disassembled and fall off. For this reason, holding | maintenance in the closed state of the valve shaft 12 and the head part 8 is cancelled | released, the valve shaft 12 and the head part 8 receive the pressure of the water for fire extinguishing from the inflow path 5, and open | release the spool hole 5a. For this reason, fire-fighting water from the inflow path 5 flows in from the spool hole 5a, passes through the diaphragm 102a and the communication hole 130, pressurizes the diaphragm 102b from below, pushes up the valve body 101, and opens the communication hole 104. The fire-extinguishing water passes through the communication hole 104, rotates the casing 6 b by the impeller 6 a of the drive unit 6, enters the head unit 8, and is sprayed from the nozzle hole 10. The rotation of the drive unit 6 is decelerated by the deceleration unit 7 and then transmitted to the head unit 8 that has descended downward, and sprinkles fire-extinguishing water while turning the head unit 8.
[0075]
At this time, the pilot valves 112A and 112B are closed on the water supply side as shown in FIG. 13, and when the spool valve 11 is opened, the pilot hole 110c passes through the pilot hole 107, the pilot channel 110a, and the pilot groove 110b from the pressurized fire-fighting water. Even if the pilot pressure is supplied to the valve piston, the pilot pressure is not supplied to the valve chamber of the valve piston 100. Further, the valve body 101 of the valve piston 100 is pushed against the pressure-extinguishing water and rises against the spring 105 as shown in the left judgment surface of FIG. 1, and maintains the open state of the communication hole 104 by the valve seat 103, Watering from the nozzle part 8 is continued.
[0076]
When a fire is extinguished by the sprinkling of the water for fire extinguishing accompanying the turning of the head portion 8, the temperature is lowered by not receiving the hot air current. When the shape memory alloys 112A and 112B fall below the memory recovery temperature T1 due to this temperature drop, the restoring force F1 of the shape memory alloys 120A and 120B becomes smaller than the restoring force F2 of the recovery springs 117A and 117B, and the recovery springs 117A and 117B The shape memory alloys 120A and 120B are deformed to the initial shape by being pushed.
[0077]
FIG. 14 shows a case where the temperature of the shape memory alloy 120A is first lowered to the memory recovery temperature T1 or less and recovered to the initial shape, and the pilot discharge path 116 on the shape memory alloy 120A side is closed by the recovery of the pilot valve 112A. Although the pilot pressure is applied to the water supply side of the pilot valve 112B, the shape memory alloy 120B exceeds the memory recovery temperature T1 and closes the flow path to the pilot hole 110 by closing the pilot hole 110g by the pilot valve body 112a. Pilot pressure is not supplied to the diaphragm chamber of the valve piston 100.
[0078]
Subsequently, as shown in FIG. 15, when the temperature of the shape memory alloy 120B is also lowered to the memory recovery temperature T1 or lower and recovered to the initial shape, the pilot discharge passage 116 is closed by the recovery of the pilot valve 112B, and the pilot holes 110g and 110h are opened. The pilot pressure is applied to the valve chamber of the valve piston 100 through the pilot hole 110h, the pilot groove 110e, and the pilot hole 110j. Therefore, the valve body 101 of the valve piston 100 is pushed down, and the valve seat 103 is pressed against the communication hole 104 to close the flow path. As a result, watering for fire extinguishing is automatically stopped.
[0079]
After sprinkling water for fire extinguishing automatically, by the time it burns up again and receives a hot air flow, both or one of the shape memory alloys 120A and 120B rises to the memory recovery temperature T1 as shown by the dashed curve in FIG. When the pilot valves 112A and 112B are actuated again to open the pilot discharge passage 116, the pilot pressure in the valve piston 100 decreases. FIG. 16 shows a case where one shape memory alloy 120A rises to the memory recovery temperature T1 and operates the pilot valve 112A again. The diaphragm chamber of the valve piston 100 communicates with the pilot discharge passage 116.
[0080]
At this time, since the second heat-sensitive operation unit 125 has already been operated, the valve body 101 is shown in the left half cross section of FIG. 1 by the pressure of the pressure-extinguishing water that pushes up the diaphragms 102a and 102b as the pilot pressure in the diaphragm chamber decreases. The communication hole 104 closed by the valve seat 103 is opened, and fire water spraying is resumed.
Of course, if the fire is extinguished after restarting watering and the temperature of all the shape memory alloys 120A, 120B falls below the memory recovery temperature T1, the shape memory alloys 120A, 120B receive the restoring force F2 of the recovery springs 117A, 117B. Is changed to an initial shape, and the pilot valves 112A and 112B are switched to a state in which pilot pressure is supplied to the diaphragm chamber of the valve piston 100, whereby the valve body 101 presses the valve seat 103 against the communication hole 104 and closes, thereby spraying water. It will be stopped.
[0081]
FIG. 17 is an explanatory view of a water spray pattern of fire extinguishing water sprayed from the nozzle portion 8 in the operating state of the fire extinguishing water spray nozzle 1 of the present invention shown in FIG. When the fire-sprinkling nozzle of the present invention installed on the ceiling surface receives heat from a fire and operates, it is supplied from slit holes 10 arranged at six locations around the nozzle portion 8 as shown in the figure. A water discharge pattern 80 is obtained by spraying fire extinguishing liquid or fire extinguishing water.
[0082]
By the water discharge pattern 80 from the nozzle portion 8, rod-like spray patterns 81 a and 81 b oriented in six directions are obtained in a predetermined protection range 82. At this time, the nozzle portion 8 receives the water flow caused by the water spray and rotates the driving portion 6. As a result, each spray pattern 81 is rotationally scanned in the protection range 82 at a low speed of about 1 rpm, and as a result, water is sprayed over the entire protection range.
[0083]
Since the slit holes 10 of the nozzle portion 8 are arranged in the vertical direction, the water spray from the nozzle portion 8 is actually a spray pattern in which spot-like water spray patterns are continuously arranged. When the water hits the fire extinguishing target surface, it scatters and flows through the fire extinguishing target surface, so that a spot-like water spray pattern spreads to form a strip-like spray pattern 81 in which adjacent comrades are connected.
[0084]
Thus, in order to obtain the strip-shaped dispersion pattern 81, the direction of the groove of the slit hole 10 formed in the second member 8B and the third member 8C is set. That is, as shown in FIG. 7 and FIG. 8, the slit hole 10 on the upper side of the head portion 8 that sprinkles far away forms a groove in the lateral direction and close to the slit hole 10 formed in the second member and the third member. A slit hole 10 on the lower side of the head portion 8 that sprays water is formed downward. And the direction of the groove | channel of the slit hole 10 is each set so that when a spot-like water spray pattern is sprinkled on the fire extinguishing object surface, it becomes a strip-shaped spray pattern 81.
[0085]
In addition, by changing the size of the slit hole 10, the amount of fire extinguishing liquid sprayed from one slit hole 10 can be changed. The slit hole 10 on the upper side of the nozzle portion 8 sprays water into the protection range away from the position of the fire-sprinkling water spray nozzle 1, so that the slit hole 10 is made larger than the lower slit hole 10 that sprays water at a short distance, Sprinkle water far away.
[0086]
Usually, since the nozzle portion 8 is a small one having a diameter of about 2 cm, it is technically difficult to form a plurality of spot holes having different directions and hole sizes in one cylindrical member. However, by assembling the dividing member in which the groove is formed as in the present invention, the small nozzle portion 8 having a plurality of holes can be easily formed.
[0087]
Here, as is apparent from the assembly assembly of FIG. 4, the slit holes 10 on the combination surface of the second member 8B have two rows in the axial direction in combination with the support arm 51 of the first member 8A of FIG. Since the two rows of slit holes are close to each other, in the scattering pattern of FIG. 17, a single rod-shaped scattering pattern 81 a is formed. The width is wider than that of the pattern 81b.
[0088]
In this way, by spraying water intensively on a specific part of the protection range, it is possible to directly extinguish the fire without being cooled by being blocked by the fire-fighting water between the water discharge patterns 80 where the hot air is sprinkling water for fire-fighting. Since it goes to the watering nozzle 1, the temperature can be detected accurately, and the timing of the water discharge stop operation can be adjusted at the time of fire extinguishing.
The reason why the speed reduction unit 7 is provided is that when the nozzle unit 8 is rotated only by the rotational force of the casing 6b of the drive unit 6, the nozzle unit 8 rotates at a considerably high speed and water is sprayed from the nozzle unit 8. Fire extinguishing water is dispersed from lump to granule, and it becomes impossible to form a spray pattern that sprays water intensively to a specific part within the protection range, and the amount of fire extinguishing water that can be reached in a single scan is small when viewed from a certain point in the protection range. This is because the particle diameter is also reduced, and the fire-fighting ability is reduced by reducing the striking power of fire-fighting water.
[0089]
In order to prevent this and form a spray pattern that sprays water intensively, the speed of the spray of the spray pattern needs to be relatively low so that the shape of the spray of the spray pattern can be maintained. ing.
FIG. 18 is a temporal change in the watering amount as seen from a certain position within the protection range 82 in FIG. 17, FIG. 18 (A) is the watering amount of a conventional fire-fighting watering nozzle, and FIG. It is the watering amount of the watering nozzle for fire extinguishing of this invention.
[0090]
In the conventional fire extinguishing sprinkler nozzle of FIG. 18A, even when viewed from one place where the protection range 82 is present, a constant amount of water is always sprinkled. On the other hand, in the fire-sprinkling water spray nozzle of the present invention shown in FIG. 18B, a large amount of water is sprayed intermittently at a constant period depending on the rotational scanning speed of the spray patterns 81a and 81b. .
In this way, when the fire-sprinkling nozzle of the present invention is used, a large amount of fire-fighting water or fire-fighting liquid is sprinkled from a conventional watering nozzle instantaneously against a fire when viewed from a certain part of the protection range 82. Higher fire extinguishing ability can be obtained by sprinkling a large amount of water instantaneously than by spraying a constant amount of water. For this reason, for example, compared with the conventional case where the water spray nozzle of the whole area of the protection range 82 of 80 liters / minute and the fire extinguishing nozzle according to the present invention set the water spray amount to 40 liters / minute and the scanning speed is about 1 rpm, the protection range. Despite the overall low water volume of 82, a higher fire fighting capability is obtained.
[0091]
Moreover, since the fire-sprinkling nozzle of the present invention can be extinguished with a small amount of water, so-called water damage damage can be reduced. Because of this, the water tank for fire extinguishing can be made smaller, and if it is equivalent to the conventional fire extinguishing capacity, the water pressure in the piping can be suppressed more than before, so the fire extinguishing pump can be of a small capacity, and even private Backup equipment such as power generation equipment can also have a small capacity, and the piping size can be reduced, so the equipment cost can be greatly reduced.
[0092]
Further, when viewed from a certain point within the protection range 82, compared to the case where water is sprayed over the entire protection range 82 as in the prior art, in the present invention, the amount of water spray is instantaneously increased and the fire extinguishing target is simultaneously increased. Since the hitting force and particle diameter of the water which reaches | attains also increase, fire extinguishing capability increases.
That is, in the present invention, the water is not dispersed in a granular form, but is sprayed on the fire extinguishing object as a strong batting water mass that is intensively sprayed on a specific portion, so that it can reach the deep part of the fire without losing the fire air current. Reach and increase fire fighting ability.
[0093]
For this reason, the time until fire suppression is short, and therefore the amount of water until fire suppression is small. Furthermore, since the fire is extinguished with water in a lump state, the part once extinguished is not burned again, and the place once extinguished can be put into a fire extinguished state continuously.
FIG. 19 shows the state of fire extinguishing by watering according to the present invention in comparison with the prior art. FIG. 19C shows a conventional watering pattern. In the conventional watering capacity, water for fire extinguishing is dispersed by a deflector in order to spray water uniformly throughout the protection area 82, and the water is sprayed into the protection area 82. A spot-like dispersion pattern 84 of granular water having various sizes with relatively small particle diameters is obtained.
[0094]
For this reason, when the momentum of the fire is strong, the dispersed water has a small particle size, so it loses the fire air flow, evaporates before reaching the deep part of the flame 83, takes time to suppress the fire, and cannot extinguish at all. is there. For this reason, the amount of fire-fighting water increases, and the damage caused by water loss increases.
Further, when seen from a certain point within the protection range 82, even if the fire flame 83 at that point is weakened momentarily by the granular water, the water once applied by the flame 83 near that time evaporates, and the nearby flame Starts to burn again. For this reason, it takes time to extinguish the fire completely.
[0095]
FIGS. 19A and 19B show water sprays in a belt-like spray pattern according to the present invention, and a spray pattern 81 for spraying a large amount of fire-fighting water intensively in a certain part within the protection range 82 is formed. For this reason, since the amount of water spray increases instantaneously and the striking power and particle diameter of the fire extinguishing water hitting the fire extinguishing target also increase, the fire extinguishing capability increases.
That is, in the spray pattern 81 of the present invention, the fire-extinguishing water is not granular as shown in FIG. 19C, but is a fire-extinguishing object as a mass of water with strong striking water that is intensively sprayed to a specific portion. Watered. For this reason, it reaches the deep part of the flame 83 without losing the fire air flow, and the fire extinguishing ability is increased, and the time until the fire is suppressed can be shortened. Therefore, the amount of water until the fire is extinguished can be reduced.
[0096]
Further, as shown in FIG. 19B, since the entire protection range 82 is scanned by the spray pattern 81 to extinguish the fire with the block of water, the fire extinguishing part 85 that has been extinguished once is prevented from burning again, and the place once extinguished It can be kept in a fire extinguisher state.
Furthermore, since the nozzle portion 8 is formed so as to spray a large amount of water in a certain part within the protection range 82, even when the protection range 82 is made larger than that of the conventional watering nozzle, it is possible to prevent fire by adjusting the scanning time. As a result, a large amount of water can be sprinkled instantaneously, and fire extinguishing performance equal to or higher than that of the conventional one can be obtained, so that the number of nozzles installed can be reduced as compared with the conventional watering nozzle.
[0097]
  For example, in the case where eight watering nozzles are conventionally installed in a predetermined protection range 82 with an installation pitch of 2.3 meters, according to the present invention, the installation pitch can be 2.6 meters, and as a result. The number of watering nozzles to be installed can be reduced to four. FIG. 20 is a second embodiment of a fire-sprinkling water spray nozzle according to the present invention, in a state where water discharge operation is performed by receiving a hot air current from a fire on the left side of a cross section of a water discharge stop state at a low temperature on the right side of the axial center line. The cross section of is shown. In addition, the spool valve 11, the shaft 12, and the drive unit 6 in the left section.bThe head portion 8 shows an external front view. Also, in FIG. 20, the same reference numerals are given to those common to FIG. 1, and the description thereof is omitted.
[0098]
  In FIG. 20, the fire-sprinkling water nozzle 1 has cases 2a, 2c, 2d and 2e screwed in from above, and the case 2b surrounds the outer peripheries of the cases 2c and 2e. Case 2cA cylinder 131 is incorporated in the interior of the cylinder. An actuator piston 12 a formed on the valve shaft 12 is slidably incorporated in the cylinder 131.
[0099]
The cylinder 131 is divided into a lower cylinder chamber 131a and an upper cylinder chamber 131b by an actuator piston 12a. The actuator piston 12a is operated by pilot valves 112A and 112B. Pilot inflow passages 132 and 133 for supplying pilot pressure from the spool hole 5a to the pilot valve 112 are formed in the cases 2a and 2e. The O-ring 134 has a hole in the center at a location where the pilot supply paths 132 and 133 communicate with each other.
[0100]
A pilot inflow passage 135 is formed in the cylinder chamber 131a of the cylinder 131, and pressurized fire-extinguishing water passing through the pilot hole 110h is supplied to the cylinder chamber 131a. Atmospheric communication passages 136 and 137 are opened to the cylinder chamber 131b above the actuator piston 12a of the cylinder 131. Moreover, the structure of the drive part 6, the deceleration part 7, the pilot valve 112, and the shape memory alloy 120 below the case 2e is the same as the embodiment of FIG.
[0101]
Next, a heat-sensitive operation when receiving the thermal air current of the fire of the embodiment of FIG. 20 will be described. At the time of low temperature, which is the normal monitoring state, the shape memory alloys 120A and 120B are contracted to the initial shape by the restoring force of the restoration spring 117 in the constant temperature state. Therefore, the pilot valves 112A and 112B are held at the valve positions where the communication with the pilot discharge passage 116 is closed by the pilot valve body 112a.
[0102]
In this state, when a hot air current is received from a fire, when the shape memory alloys 120A and 120B reach the memory recovery temperature T1, the pilot valve body 112a is pushed up to close the pilot hole 110g on the water supply side, and at the same time, the cylinder chamber of the cylinder 131 131 a is opened to the pilot channel 116 through the pilot hole 135. However, at this time, the second heat sensitive operation part 125 is not operated, and the valve shaft 12 and the spool valve body 11 are held in the closed state located in the spool hole 5a.
[0103]
When the first heat-sensitive operation unit 124 is thus operated and further rises to the watering start temperature T2, the fusible alloy 47 is melted and the members of the heat-sensitive operation mechanism are disassembled and dropped off. For this reason, the valve shaft 12 and the head portion 8 receive the pressure of fire-extinguishing water and descend to open the spool hole 5a. For this reason, the fire-extinguishing water from the inflow passage 5 passes through the communication hole 104 from the spool hole 5 a and rotates the casing 6 b of the drive unit 6, and is then sprayed to the head unit 8.
[0104]
At this time, the pilot valves 112A and 112B close the water supply side pilot hole 110g, and even if the pilot valve 110c is supplied with pilot pressure through the pilot inflow passages 132 and 133 when the spool valve 11 is opened, the cylinder chamber No pilot pressure is supplied to 131a.
When the fire is extinguished by sprinkling water for fire extinguishing from the head portion 8, the temperature is lowered by not receiving the hot air current. When the shape memory alloys 120A and 120B drop below the memory recovery temperature T1 due to this temperature drop, the restoring force of the shape memory alloy 120 decreases and is pushed by the recovery spring 117 to deform the shape memory alloy into the initial shape.
[0105]
At this time, the pilot valve body 112a of the pilot valve 112 closes the pilot discharge passage 116 and simultaneously opens the pilot inflow passage 110g, and the pressure-extinguishing water pressure with respect to the inlet 5 is supplied to the cylinder chamber 131a of the cylinder 131 as the pilot pressure. The For this reason, the spool valve body 11 is pushed up by the actuator piston 12a and is fitted into the spool hole 5a to close the flow path. This automatically stops the water for fire extinguishing.
[0106]
After the water supply for fire extinguishing is automatically stopped, if the shape memory alloy 120 rises again to the memory recovery temperature T1 by receiving a hot air flow again, the pilot valve 112 is activated again to discharge the pilot pressure in the cylinder chamber 131a. . At this time, since the second heat-sensitive operation unit 125 has already been operated, the spool valve body 11 is drawn downward from the spool hole 5a by the pressure of the fire-extinguishing water as the pilot pressure is discharged from the cylinder chamber 131a. Is opened, and water discharge for fire extinguishing is resumed. In this way, the water discharge start and water discharge stop operations may be performed by opening and closing the spool hole 5a by the spool valve 11.
[0107]
FIG. 21 shows another form of the spray pattern 81 sprayed from the nozzle portion 8. FIG. 21A shows a case in which four radial slits are formed at intervals of 90 ° in the circumferential direction of the nozzle portion 8, and a cross in which a band-shaped spray pattern 81 is crossed with respect to the protection range 82. A shape dispersion pattern is obtained.
FIG. 21B shows a case where slits that are two radius portions are formed in the nozzle portion 8 with an interval of 180 °, and a strip-shaped dispersion pattern 81 is obtained in the diametrical direction in the protection range 82. Further, FIG. 21C shows a case where slits that form three radial portions are formed in the circumferential direction of the nozzle portion 8 at a short angular interval of about 10 °, and in this case, radial in the protection range 82 in the radial direction. It is possible to obtain three spreading patterns 81 spread out.
[0108]
In the embodiment of the present invention, the nozzle portion 8 is divided into one first member 8A, two second members 8B, and two third members 8C as shown in FIG. By dividing the positions along the slit holes arranged in the direction of the outer peripheral axis of the portion 8 into a combined surface, a divided structure corresponding to an arbitrary scattering pattern can be obtained.
In addition, by selecting whether or not to form straight grooves on the combined surfaces of the respective members while maintaining the divided structure of FIG. 4, the number of spraying patterns can be appropriately determined by changing the arrangement positions of the slit holes.
[0109]
  Furthermore, the shape of the slit hole 10 is not limited to forming a square groove, but may be a semicircle or a triangle. Furthermore, although a soluble alloy is used as a heat-sensitive member that causes the second heat-sensitive operation unit 125 to start watering,alloyInstead of the above, a structure may be employed in which a glass bulb is used to perform a thermal operation by breaking the glass bulb at the watering start temperature T2.
[0110]
Furthermore, the present invention is not limited to the above embodiment, and the memory recovery temperature T1 of the shape memory alloy that generates a restoring force for performing the thermal operation of the first thermal operation unit 124 is sprayed by the second thermal operation unit 125. Any structure can be used as long as the structure is set lower than the watering start temperature T2 by a fusible alloy or glass bulb that is started, and is not limited by the embodiment.
[0111]
Further, in the embodiment of the present invention, the shape memory alloy 120 has a shape wound in a coil spring shape. However, for example, a shape of a spring plate is used, and in an initial state, the shape memory alloy 120 is bent in an arc shape at the center. Further, it may be structured such that the bent portion extends when the memory recovery temperature T1 is reached.
Furthermore, the head portion 8 of the embodiment of the present invention has a structure in which a plurality of members are combined and a plurality of slit holes are arranged. However, the present invention is not limited to this, and the head portion 8 is concentrated on a specific portion within the protection range. Any head portion having a structure for forming a spray pattern for spraying water may be used. For example, a sprinkling pattern as shown in FIGS. 17 and 21 may be formed by providing a slit in a spherical head.
[0112]
In addition, the shape memory alloy 120 and the recovery urging member do not necessarily have to be configured to press each other. When the shape memory alloy 120 is lower than the memory recovery temperature T1, the recovery urging member acts to return to the initial shape. What is necessary is just an opposing relationship.
[0113]
【The invention's effect】
  As described above, according to the present invention, it is within the protection range.specificPartA band-shaped spray pattern that connects the vicinity of the water spray nozzle installation position to the outer periphery of the protection area as a block of water is formed and sprayed intensively, and the speed is set to a speed that can maintain the shape of the band-shaped spray pattern.Since the scanning is performed within the protection range, since a large amount of fire extinguishing liquid or water for fire extinguishing is instantaneously applied to the fire, higher fire extinguishing ability can be obtained and damage of water loss is reduced.
[0114]
If the fire extinguishing capacity is comparable to the conventional one, the water pressure in the pipe can be lowered, the capacity of the water tank, pump, etc. can be reduced, the pipe size can be further reduced, and it can be concentrated on a part within the protection range. Since the nozzle part is formed to spray water, it is possible to maintain the same level of fire extinguishing capability as before, even if the protection range is wider, so the number of nozzles installed can be reduced, resulting in equipment costs. Can be reduced.
[0115]
Furthermore, the nozzle part is divided into a plurality of members on the surface passing through the slit hole arrangement part, and a plurality of linear grooves for forming slit holes are formed and combined on the combination surface of each divided member, so that the outer periphery of the nozzle part It is easy to process and form a plurality of slit holes arranged with any spraying direction on the surface, and the spraying pattern from the nozzle part to the protection area can be freely set in any direction, position and shape as necessary Can be.
[0116]
Furthermore, in the present invention, when receiving a hot air flow due to a fire, the valve mechanism can be sprinkled by operating the first heat-sensitive operating portion by the restoring force when the memory recovery temperature of the shape memory alloy set to be low is first reached. In this state, when the temperature due to the hot air flow further rises and reaches the specified watering start temperature, the second heat-sensitive operating part using a fusible alloy, a glass bulb or the like is thermally decomposed, and the first heat-sensitive operating part Watering can be started by releasing the holding of the valve mechanism that has already been watered. As a result, even if there is a range in the memory recovery temperature of the shape memory alloy, the watering start temperature can be set by a soluble alloy or a glass valve. It accurately sets the specified temperature to guarantee the sprinkling start temperature, ensures the reliability of the automatic opening and closing sprinkler head using shape memory alloy, and enables mass production at the same time.
[0117]
In addition, water spraying is started only when both the first heat-sensitive operating part using the shape memory alloy and the second heat-sensitive operating part using the fusible alloy and the glass bulb are operated. Even if it is damaged by hitting it, both hardly operate at the same time due to the damage, so it is possible to reliably prevent water spraying due to the damage.
[0118]
In addition, when the fire is extinguished by watering and the temperature is lowered, the restoring force of the shape memory alloy is reduced and is deformed to the initial shape by the recovery spring, which automatically closes the valve mechanism of the first heat sensitive operation part. Water spray can be stopped and water loss after fire extinguishing can be minimized. The temperature for stopping watering is the memory recovery temperature of the shape memory alloy set sufficiently lower than the watering start temperature determined by the fusible alloy and the glass bulb. Thus, the temperature for stopping watering is sufficiently high. By making it low, the possibility of relapse after fire extinguishing can be greatly reduced.
[0119]
Of course, if a hot air flow due to re-fire after fire extinguishing is received, the valve mechanism of the first thermosensitive operating part can be operated again at the predetermined memory recovery temperature and water can be sprayed again. The fire can be reliably extinguished by re-watering.
Furthermore, the shape memory alloy has high corrosion resistance as a material characteristic, and even when monitoring installation over a long period of time, the shape memory alloy can reliably operate when receiving a hot air current from a fire to guarantee high reliability. Furthermore, since there is no need to rely on fire detection signals from fire detectors to stop and start watering, there is no problem of water sprinkling due to malfunction of fire detectors, and reliability when installed in a fixed fire extinguishing facility is improved. Can be guaranteed.
[0120]
In addition, in order to spray water by forming a concentrated spray pattern in a specific part within the protection range, the water spray nozzle for fire extinguishing is not blocked by the fire-extinguishing water from places other than the spray pattern. Therefore, accurate temperature detection is possible, and it is possible to prevent water from being stopped before the fire is extinguished.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an embodiment of a watering nozzle for fire extinguishing according to the present invention in a half section for each of a monitoring state and a watering station belt
FIG. 2 is an end view of the bottom side of FIG.
FIG. 3 is an explanatory diagram of the climate of the double planetary gear used for the deceleration of FIG.
4 is an exploded view of the nozzle portion of FIG.
5 is an explanatory diagram of the first member in FIG. 4;
6 is an explanatory view of the assembly assembly of the second and third members of FIG. 4;
7 is an explanatory diagram of the second member in FIG. 4. FIG.
FIG. 8 is an explanatory diagram of the third member in FIG.
FIG. 9Explanatory view showing the spacer ring and valve ring provided with the pilot valve of FIG.
FIG. 10Fig. 1 is a characteristic diagram of the measured elastic modulus of the shape memory alloy with respect to temperature.
FIG. 11 is a diagram for explaining the operation of the embodiment of the present invention;
12 is an operation explanatory diagram of the pilot valve of FIG. 1 in a steady monitoring state.
13 is an operation explanatory diagram of the pilot valve of FIG. 1 in a watering state at the time of fire.
FIG. 14 is an operation explanatory diagram when the pilot valve on one side is restored during watering.
FIG. 15: Both pilot valves are restored during wateringOldOperation explanatory diagram when watering stops
FIG. 16 is an operation explanatory diagram when one side of the pilot valve is activated and watering is resumed after watering is stopped.
FIG. 17 is an explanatory diagram of the watering operation in the operating state of FIG.
FIG. 18 is a time chart showing the watering amount of the present invention as seen from one place of the protection range in comparison with the conventional one.
FIG. 19 is an explanatory view showing the state of fire extinguishing by the watering pattern of the present invention in comparison with the conventional one.
FIG. 20 is a sectional view showing another embodiment of the present invention in a half section for each of a monitoring state and a water discharge state.
FIG. 21 is an explanatory view showing another embodiment of the watering pattern according to the present invention.
FIG. 22 is an explanatory diagram showing a conventional example.
FIG. 23 is a sectional view of a conventional automatic opening / closing type sprinkler head.
FIG. 24 is a characteristic diagram of elastic modulus with respect to temperature of shape memory metal.
[Explanation of symbols]
1: Sprinkling nozzle for fire extinguishing
2: Nozzle body
3: Connection thread
5: Inflow channel
5a: Spool hole
6: Drive unit
6a: Impeller
6b: casing
7: Reducer (double planetary gear mechanism)
8: Nozzle
8A: First member
8B: Second member
8C: Third member
10: slit hole
11: Spool valve
47: Soluble alloy (watering start temperature T2)
80: Watering pattern
81: Scatter pattern
82: Protection range
100: Valve piston
101: Valve body
102a, 102b:DaIafram
103: Valve seat
104: Communication hole
105: Spring
108: Spacer
112A, 112B: Pilot valve
116: Pilot discharge path
117A, 117B: recovery spring (recovery biasing member)
120A, 120B: Shape memory alloy (memory recovery temperature T1)
124: 1st thermosensitive operation part
125: Second heat-sensitive actuator

Claims (8)

In a watering nozzle for fire extinguishing in a fixed fire extinguishing system that is connected to a fire extinguishing pipe that is installed above the protection area such as a ceiling surface and is filled with pressurized fire extinguishing water,
A swivelable nozzle section that forms a band-shaped spray pattern that connects from the vicinity of the water spray nozzle installation position to the outer periphery of the protective area as a block of water in a specific part within a predetermined protective area,
A drive unit that rotates a drive shaft using a water flow when water for fire extinguishing is sprinkled from the nozzle unit as a drive source;
The rotation of the drive shaft of the drive unit is input, the nozzle unit is rotated at a speed that can maintain the shape of the spray pattern according to a predetermined speed reduction ratio, and the spray pattern is scanned within the predetermined protection range. A speed reducer for spraying water over the entire predetermined protection range;
The shape memory alloy and the recovery urging member are arranged opposite to each other, and when the temperature is lower than a predetermined memory recovery temperature, the shape memory alloy is deformed to an initial shape by the recovery urging member and the valve mechanism is held at the sprinkling stop position. When the memory recovery temperature is reached, a first heat-sensitive operating part that makes the valve mechanism operable to the watering position with a restoring force to the memory shape of the shape memory alloy;
A predetermined watering start temperature higher than the memory recovery temperature is set, and when the temperature is lower than the watering start temperature, the valve mechanism is held in a closed state regardless of the operating state of the first heat sensitive operation unit, and the watering is performed. When the start temperature is reached, a second heat-sensitive operation unit that decomposes by heat to release the closed holding of the first heat-sensitive operation mechanism and spray water for fire extinguishing,
A watering nozzle for fire extinguishing of a fixed fire extinguishing equipment, characterized by comprising: 2. The fire-sprinkling nozzle of the fixed fire-extinguishing equipment according to claim 1, wherein the first heat-sensitive operating unit is lowered to a temperature lower than the memory recovery temperature during watering by the operation of the second heat-sensitive operating unit. Is a water spray nozzle for fire extinguishing in a fixed fire extinguishing system, wherein the valve mechanism is operated in a closed state by stopping the water spray by deforming the shape memory alloy into an initial shape by the recovery urging member. In the watering nozzle for fire extinguishing of the fixed fire-extinguishing equipment according to claim 2, the first heat-sensitive operation unit is configured to deform the shape memory alloy into an initial shape by the recovery urging member and stop watering. A watering nozzle for fire extinguishing in a fixed fire extinguishing system, wherein when the memory recovery temperature is reached, the valve mechanism is moved to a watering position by a restoring force to the memory shape of the shape memory alloy and water is sprayed again. In the watering nozzle for fire extinguishing of the fixed fire extinguishing equipment according to any one of claims 1 to 3,
The first heat-sensitive operation unit includes a plurality of the shape memory alloys arranged around the second heat-sensitive operation unit, and a restoring force when at least one of the plurality of shape memory alloys is activated upon reaching the memory recovery temperature. The valve mechanism is made operable to the watering position, and when all of the plurality of shape memory alloys are restored to the initial shape during the watering, the valve mechanism is operated in a closed state to stop the watering. Watering nozzle for fire extinguishing of fixed fire extinguishing equipment. 5. The water spray nozzle for fire extinguishing of the fixed fire extinguishing equipment according to claim 4, wherein the plurality of shape memory alloys are disposed above a position of the water spray section exposed downward when the second heat sensitive operation section is operated. Sprinkling nozzle for fire extinguishing of fixed fire extinguishing equipment. The fire-sprinkling nozzle for a fire extinguishing system according to any one of claims 1 to 5, wherein the shape memory alloy has a coil spring shape contracted in an axial direction as the initial shape, and reaches the memory recovery temperature. Water spray nozzle for fire extinguishing of fixed fire extinguishing equipment, which is deformed into a coil spring shape extending in the axial direction when reaching 2. The fire-sprinkling nozzle according to claim 1, wherein the nozzle portion is a cylindrical body whose tip is narrowed into a conical shape, and the cylindrical body is divided into a plurality of members, and one of the combined surfaces of the divided members. A watering nozzle for fire extinguishing, characterized in that a linear groove forming a slit hole is communicated by setting a specific radiation angle from an inner inflow path toward an outer peripheral surface. The fire-sprinkling nozzle according to claim 1, wherein the drive unit, the speed reduction unit, and the nozzle unit are sequentially arranged from the inflow path side with respect to the nozzle body, and the nozzle unit is slid in the axial direction with respect to the drive unit. It is connected through a slide connecting part that is movable and rotates integrally around an axis, and the rotation of the drive part is made through the speed reduction part in a state where the nozzle part is slid during the thermal decomposition of the second thermosensitive operating part. Sprinkling nozzle for fire extinguishing, which is transmitted to the nozzle part.

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