JP4511235B2 - Closed sprinkler head - Google Patents

Description

The present invention relates to a closed-type sprinkler head including a heat sensitive element that is actuated by melting a readily fusible substance by fire heat to start water discharge.

  Conventionally, in this type of closed-type sprinkler head, when the heat-sensitive metal provided in the heat-sensitive body melts when it receives a hot air current from a fire, the heat-sensitive body is thermally decomposed and the valve is opened. At the same time, the deflector is dropped downward to discharge the fire-fighting water. As the readily fusible metal provided in the heat sensitive body, a low-temperature solder having a predetermined temperature necessary for fire detection is usually used.

  FIG. 8 is a sectional view of a conventional closed sprinkler head. In FIG. 8, the closed sprinkler head includes a body 101 and a frame 102. The body 101 is provided with a pipe connection screw 103 connected to the water supply pipe at the top, and a nozzle 104 is formed inside. The body 101 opens at the bottom, and the frame 102 is fixed by screwing.

  In this assembled state, the valve body 106 integrally provided with the deflector 105 is disposed at a position where the opening of the nozzle 104 is closed, and is sealed by the packing 107. The deflector 105 includes a plurality of radially diffusing water diffusing portions around it, and a deflector shaft 108 is mounted on the outer peripheral side thereof. The deflector shaft 108 is inserted into the extension guide 109, and a stopper 108a is formed on the upper portion.

  An operating spring 110 is incorporated between the body 101 and the deflector 105. A thermal operation part 111 is provided on the opening side of the frame 102. The heat sensitive operation unit 111 includes a slider 112, a balancer 114, a ball 113, and a heat sensitive body 116, and is assembled and fixed to the frame 102 in a state where the valve body 106 is held in the illustrated closed position.

  Here, the heat sensitive body 116 is prepared in advance as an assembly including a cylindrical casing 118 integrally provided with a heat insulating ring 117 and heat collecting fins 119, a fusible substance 120, and a shaft 121. After mounting the slider 112 and the balancer 114 on the frame 102 side, the shaft 121 is attached and fixed by screwing into the nut 122 of the shaft 121.

The operation of the closed sprinkler head of FIG. 8 is as follows. The closed sprinkler head is connected to the water supply pipe of the sprinkler fire extinguishing equipment with the valve body 106 closing the nozzle 104. When a thermal air current is received in this state from the fire, The fusible substance 120 is melted and the balancer 114 is lowered.

  For this reason, the support of the ball 113 to the frame 102 is lost, and the slider 112, the balancer 114, and the heat sensitive body 116 drop off. As a result, the support of the closed state of the valve body 106 is released, and the valve body 106 and the deflector 105 are dropped by the water pressure of the fire-extinguishing water applied to the nozzle 104 serving as the inflow passage and the force of the operating spring 110, and the nozzle 104 is moved. Open and discharge fire-fighting water.

The deflector 105 dropped downward is stopped at a position where the stopper 108a of the deflector shaft 108 comes into contact with the lower portion of the extension guide 109, and the deflector 105 is exposed downward from the opening of the frame 102. Firefighting water released from hits and sprinkles firefighting water around.
JP 2000-176043 A

  However, in such a conventional closed type sprinkler head, the fusible substance 120 is disposed in the cylindrical casing 118 and is sandwiched by the shaft 121. The heat received by the hot air flow of the fire is transmitted only to the fusible substance 120 from the casing 118 side, which causes a problem that the thermal operation becomes slow and the fire spreads before the sprinkler head is discharged. It was.

  Moreover, in the low temperature solder used as the fusible substance 120 for the heat sensitive body 116, for example, in the case of a solder having a melting point of 72 ° C., lead Pb and cadmium Cd are contained as components, which are harmful to the environment. There was a problem of being.

It is an object of the present invention to provide a closed sprinkler head that can efficiently transmit fire heat to a fusible material of a heat sensitive body to reduce operation delay and is environmentally friendly.

  In order to achieve this object, the present invention is configured as follows. The present invention relates to a closed type sprinkler head having a heat sensitive element that is activated by melting of a readily fusible substance due to fire heat and starts water discharge. The heat sensitive element has a hollow cylindrical body having through holes at both ends. It has a divided casing that is divided so as to include a part of each side surface, and has an assembly structure in which the periphery of the fusible substance is wrapped between the divided casings. Here, the heat sensitive body integrally forms a fan-shaped radiating fin at each of the end portions of the outer surface of the divided casing.

  The readily fusible substance is a molded body obtained by molding a low melting point alloy, inorganic compound or organic compound having a melting point between 50 ° C. and 150 ° C. into a substantially donut shape having a rectangular cross section.

  A readily fusible substance has a melting point between 50 ° C. and 150 ° C., is stable for a long period of time, has low toxicity, has no highly reactive functional group or functional group having toxicity, does not dissolve in water, and has sublimability. There are no inorganic compounds. The inorganic compound is diselen diiodide or gallium trichloride.

  A readily fusible substance has a melting point between 50 ° C. and 150 ° C., is stable for a long period of time, has low toxicity, has no highly reactive functional group or functional group having toxicity, does not dissolve in water, and has sublimability. There are no organic compounds.

As this organic compound,
α-monostearin,
β-monostearin,
α-monopalmitin,
β-monopalmitin,
2'-methoxyacetoacetanilide,
4- (1-methyl-1-phenylethyl) phenol,
Benzoin isopropyl ether,
Benzoin ethyl ether,
Stearyl phosphate,
Distearyl thiodipropionate,
Triphenyl,
Triphenylphosphine,
N-benzylacetamide,
Triacontán,
2-naphthyl acetate,
Zinc oleate,
Oleic acid amide,
Indolizine,
Dimethyl isophthalate,
Ethylene benzoate,
Phenyl benzoate,
p-tert-butylphenyl salicylate,
p-octylphenyl salicylate,
2-hydroxy-4-methoxybenzophenone,
2,2′-dihydroxy-4-methoxybenzophenone,
2,6-di-t-butyl-4-methylphenol,
A simple substance selected from or a mixture thereof, or
Polyethyl methacrylate,
Polymethacrylate-sec-butyl,
Chroman-indene copolymer,
A synthetic polymer selected from di-n-octyltin maleic acid polymer or alkylphenol formaldehyde resin.

  According to the present invention, the casing that encloses the fusible substance is formed as a divided casing including a plurality of members divided so as to include a part of the outer surface, and the fusible substance is sandwiched between the divided casings. Due to the heat-sensitive body of the assembly structure, the fire heat received by the heat collecting fins can be efficiently transmitted from at least three sides of the fusible substance, the outer peripheral part, the upper face part and the lower face part by the divided casing. This increases the amount of fire heat transferred, speeds up the heat-sensitive operation in the event of a fire, and can reliably extinguish the fire early.

In addition, as an easily fusible substance of a heat sensitive body, it has a melting point between 50 ° C. and 150 ° C., is stable for a long period of time, has low toxicity, has no highly reactive functional group or functional group showing toxicity, and is soluble in water. By using an inorganic compound or an organic compound that does not sublimate and is not sublimable, it is possible to realize a closed sprinkler head that is environmentally friendly and does not adversely affect the human body or the like.

  FIG. 1 is an explanatory view showing an embodiment of a closed sprinkler head according to the present invention, and FIG. 1 (A) shows a half sectional view and FIG. 1 (B) shows a bottom view. In FIG. 1, the sprinkler head of the present invention includes a body 1 and a frame 2. A pipe connection screw 3 connected to the water supply pipe is provided at the upper part of the body 1, and an inflow path 4 a reaching the nozzle 4 is formed inside.

  The body 1 opens at the bottom, and the frame 2 is fixed by screwing. Inside the frame 2, a valve body 6 integrally provided with a deflector is disposed at a position where the opening of the nozzle 4 is closed, and is sealed by a packing 7. The deflector 5 includes a plurality of radially diffusing water diffusing portions, and a deflector shaft 8 is mounted on the outer periphery thereof. The deflector shaft 8 is inserted into the extension guide 9 and forms a stopper 8a on the upper portion. An operating spring 10 is incorporated between the body 1 and the deflector 5 which are inside the extension guide 9, and the valve body 6 is biased in the opening direction via the deflector 5.

  FIG. 2 is an explanatory view showing the assembly part of the deflector 5 of FIG. In FIG. 2, three deflector shafts 8 having a lower end fixed to the outer periphery of the deflector 5 are inserted in the lower part of the extension guide 9, and are prevented from coming off by a stopper 8a (see FIG. 1) in the extension guide 9. Yes. The deflector 5 is integrally formed with a valve body 6 at the center.

  Referring to FIG. 1 again, a heat-sensitive operation unit 15 is provided on the opening side of the frame 2. The heat-sensitive operation unit 15 includes a spacer 11, a slider 12, a ball 13, a balancer 14, a shaft 21, and a nut 22, and the valve body 6 is screwed into the body 1 by screwing the frame 2 into the body 1 in a state where the frame 2 is assembled. The nozzle 4 is assembled and fixed in the illustrated closed state in contact with the nozzle 4 via a packing 7.

  The heat sensitive body 16 is assembled to the heat sensitive operation part 15 by sandwiching and fixing the spacer 11, the slider 12, and the balancer 14 by screwing the upper nut 22 with respect to the insertion of the shaft 21 through the heat insulating rings 17 a and 17 b arranged vertically. Yes.

  FIG. 3 is an exploded view of the heat sensitive body 16 of FIG. The heat sensitive body 16 is composed of an upper casing 24a and a lower casing 24d, and when the two are combined, the fusible substance 20 is sandwiched between them so as to wrap around the entire circumference.

  The upper casing 24a has a shape integrally including an upper surface 25a of a hollow cylindrical body that opens upward at the center and a pair of opposed outer surfaces 26a of the outer surface divided into four, and is formed at the lower end of the outer surface 26a. The fan-shaped heat collecting fins 19a are integrally formed. Furthermore, a pair of opposed inner side surfaces 27a among the four divided inner side surfaces is formed inside the opening of the upper surface 25a.

  The lower casing 24b has a lower surface 25b at the center, and a pair of outer surfaces 26b at positions orthogonal to the outer surface 26a of the upper casing 24a are integrally formed of the outer surfaces divided into four integrally with the lower surface 25b. Yes. Further, a pair of inner side surfaces 27b is formed inside the opening hole of the lower surface 25b. A pair of fan-shaped heat collecting fins 19b located between the heat collecting fins 19a in the upper casing 24a is formed at the end of the outer surface 26b.

  Further, a plurality of cutouts 28 are formed at the position of the end of the outer surface 26b that becomes the root of the heat collecting fins 19b. This notch 28 is also formed on the upper casing 24a, and has a portion that protrudes due to the formation of the inner notch 28 at the base of the heat collecting fin 19a when the outer surface 26a is viewed from the outside. The notch 28 reinforces the base portion between the heat collection fin 19 and the outer surface 26.

  The easily fusible substance 20 is a low melting point alloy, inorganic compound or organic compound having a melting point in the range of 50 ° C. to 150 ° C., and is formed in a substantially donut shape having a rectangular cross section. The method of forming the fusible substance 20 is formed by pouring a predetermined amount of a fusible substance heated and melted in advance into a donut-shaped mold having a rectangular cross section and cooling it. Further, when the easily fusible substance is supplied as a member having a size that can be machined, it may be formed into a donut shape by machining. As yet another method, a powdery fusible substance can be obtained by tableting with a tableting machine.

  FIG. 4 is an explanatory view of the assembled state of the heat sensitive body 16 of FIG. As is apparent from the exploded view of FIG. 3, the upper casing 24a and the lower casing 24b are combined in the vertical direction with the dough-shaped easily-fusible substance 20 incorporated therein, so that the inner easily-fusible substance 20 is combined. On the other hand, on the casing side, the upper casing 24a and the lower casing 24b can be sandwiched between the upper surface 20a, the lower surface 20b, the outer surface 20c, and the inner surface 20d of the fusible substance 20 in FIG. .

  FIG. 5 is a cross-sectional view of a portion of the heat sensitive body 16 shown in FIG. 1. In particular, the cross section of the heat sensitive body 16 shows a portion where the notch 28 is formed. The fusible substance 20 sandwiched between the upper casing 24a and the lower casing 24b in the heat sensitive body 16 so as to wrap the entire casing in the inner portion of the fusible substance 20 receives the fire heat received by the heat collecting fins 19a and 19b. I can tell from the lap.

  When the fusible substance 20 reaches the temperature of the set melting point by receiving the heat of the fire, it melts, receives a compressive force due to the assembly load, and flows down to the outside from the gap portion when the upper casing 24a and the lower casing 24b are assembled, When the fusible substance 20 flows out, it is arranged outside the balancer 14 and the slider 12, the support by the balls 13 on the inner flange of the frame 2 is released, the heat-sensitive operating part 15 is dropped, and the nozzle 4 by the valve body 6. Will be released and the water for pressurized fire extinguishing will be discharged.

  Next, the operation when receiving fire heat in the embodiment of FIG. 1 will be described. The closed sprinkler head of the present invention is connected to the water supply pipe of the sprinkler fire extinguishing equipment with the valve body 6 closing the nozzle 4. When the temperature reaches a predetermined temperature determined by the above, the fusible substance 20 of the heat sensitive body 16 is melted, and the heat sensitive operation part 15 located below the deflector 5 falls.

  Here, the fire heat received by the heat collecting fins 19a and 19b when receiving a thermal airflow due to a fire is transmitted to the upper casing 24a and the lower casing 24b located in the center, and is apparent from the exploded view of FIG. In addition, the upper casing 24a and the lower casing 24b transmit fire heat to the fusible material 20 sandwiched between the upper casing 20a, the lower casing 20b, the outer casing 20d, and the inner casing 20d by contact with four surfaces. It is in a state where heat is very easily transmitted. For this reason, the easily fusible substance 20 is surely melted without causing an operation delay when the fire is small, and water can be discharged by dropping the heat-sensitive operation unit 15.

  FIG. 6 is an explanatory view of a water discharge state by the heat-sensitive operation of the embodiment of FIG. The fusible substance 20 in the casing of the heat sensitive body 16 that has received the transmission of fire heat melts when reaching a temperature determined by the melting point, and flows out like a fusible substance 20a through a slight gap between the casings. To do. When the fusible substance 20a melts and flows out, the balancer 14 descends with respect to the frame 2, the support state with respect to the ball 13 incorporated in the flange at the inner lower end of the frame 2 is released, and the water supply pressure and the force of the operating spring 10 are released. In response, the heat-sensitive operating unit 15 falls off the frame 2.

  Therefore, the support of the valve body 6 pressed against the nozzle 4 is released, the deflector 5 is pushed down by the force of the operating spring 10, and the deflector 5 has a stopper 8 a of the deflector shaft 8 on the outer peripheral side under the extension guide 9. It stops at the position where it abuts. In this state, the fire-fighting water discharged from the nozzle 4 comes into contact with the deflector 5 and is sprinkled around as shown by the broken line.

  In the above embodiment, the heat collecting fins 19a and 19b are formed integrally with the upper casing 24a and the lower casing 24b. However, the heat collecting fins 19a and 19b may be attached by fitting or caulking as separate parts without being integrated. .

  Further, the heat collecting fins 19a and 19b are not limited to the outermost ends of the outer side surfaces 26a and 26b, and may be provided in a horizontal position with the upper surface 25a and the lower surface 25b as shown in FIG. It may be provided. The shape of the heat collecting fins may not be a sector shape.

  Further, the heat sensitive body 16 of the present invention can take an appropriate divided casing structure as long as it is sandwiched so as to wrap around the fusible substance 20 incorporated therein.

  In the present invention, the inner side surfaces 27a and 27b of the upper and lower casings are provided. However, the inner side surfaces 27a and 27b are not necessarily provided. The surface is surrounded by the surface, and water discharge at the time of fire can be started earlier than the conventional heat conduction by the contact of the two surfaces. Moreover, the material of a division | segmentation casing is not restricted to upper and lower two members, You may become more members than it.

  Next, the fusible substance 20 used for the heat sensitive body 16 of the closed sprinkler head 1 of the present invention will be described in detail as follows. The material of the divided casing is not limited to the upper and lower two members, and may be a larger number of members.

The easily fusible substance 20 of the present invention uses, for example, an inorganic compound. The inorganic compound used for the fusible substance 20 must satisfy the following conditions.
(1) The melting point is between 50 ° C and 150 ° C.
(2) There should be no functional group that is stable for a long period of time, has low toxicity, has high reactivity, or exhibits toxicity.
(3) Do not dissolve in water.
(4) No sublimation.

  In addition to this, it is a matter of course that it has the rigidity to be incorporated into the heat sensitive body 15 and maintain the built-in structure in the state molded into the donut shape of FIG.

In the above condition (2), the highly reactive functional group includes, for example, a group showing an acidic reaction such as a nitro group and a sulfonic acid group, a group showing an alkaline reaction such as an amino group, and the like. There is a risk of deterioration due to a reaction that leads to corrosion with the material, and a reaction with, for example, SOx, NOx, CO ₂ , H ₂ O, etc. in the air. Moreover, examples of the group exhibiting strong toxicity include a cyano group.

  The condition (3) that does not dissolve in water includes those that hardly dissolve, and is a level generally expressed as insoluble in water. Some of the substances shown below have a hydroxy group, and the hydroxy group is generally a hydrophilic group, but the compound of the present invention is selected to be water-insoluble. This water-insoluble property can prevent deformation, dissolution, deliquescence, etc. due to water leakage or moisture absorption due to condensation.

  The absence of sublimability in the condition (4) means that there is almost no vapor pressure at the time of solid and it is naturally odorless, and the mass can be prevented from decreasing when left for a long period of time.

Examples of inorganic compounds that satisfy the conditions (1) to (4) include the following. However, parentheses indicate melting points.
Niselen diiodide (70 ° C)
Gallium trichloride (76-80 ° C)

In another embodiment of the present invention, for example, an organic compound is used as the fusible substance 20. The organic compound used for the fusible substance 20 must satisfy the following conditions as in the case of the inorganic compound.
(1) The melting point is between 50 ° C and 150 ° C.
(2) There should be no functional group that is stable for a long period of time, has low toxicity, has high reactivity, or exhibits toxicity.
(3) Do not dissolve in water.
(4) No sublimation.

  In addition to this, it is a matter of course that it has the rigidity to be incorporated in the heat sensitive body 16 and maintain the built-in structure in the state molded into the donut shape of FIG.

Examples of organic compounds satisfying the conditions (1) to (4) include the following. However, parentheses indicate melting points.
α-monostearin (74 ° C.),
β-monostearin (75.2 ° C.),
α-monopalmitin (66.9 ° C.),
β-monopalmitin (68.5 ° C),
2′-methoxyacetoacetanilide (83 ° C.),
4- (1-methyl-1-phenylethyl) phenol (71-73 ° C.),
Benzoin isopropyl ether (77 ° C),
Benzoin ethyl ether (58-60 ° C),
Stearyl phosphate (70 ° C.),
Distearyl thiodipropionate (59 ° C.),
Triphenyl (80 ° C.),
Triphenylphosphine (82 ° C.),
N-benzylacetamide (61 ° C.),
Triacontane (65.8 ° C.),
2-naphthyl acetate (70 ° C.),
Zinc oleate (70 ° C),
Oleic acid amide (74 ° C.),
Indolizine (75 ° C),
Dimethyl isophthalate (68.5 ° C.),
Ethylene benzoate (73 ° C.),
Phenyl benzoate (71 ° C.),
p-tert-butylphenyl salicylate (62-64 ° C),
p-octylphenyl salicylate (72-74 ° C.),
2-hydroxy-4-methoxybenzophenone (63-64 ° C.),
2,2′-dihydroxy-4-methoxybenzophenone (68-70 ° C.)
2,6-di-tert-butyl-4-methylphenol (69 ° C.)
Or a mixture of these.

Moreover, as an organic compound used for the easily fusible substance 20 of this invention,
Ethyl methacrylate (65 ° C),
Polymethacrylate-sec-butyl (62 ° C.),
Chroman-indene copolymer (70 ° C),
Di-n-octyltin maleic acid polymer (82-93 ° C.) or alkylphenol formaldehyde resin (75-90 ° C.)
A synthetic polymer selected from

  In addition, as an inorganic compound or an organic compound used for the fusible substance 20 of the heat sensitive body 16 in this invention, it is not limited to said Example, The appropriate inorganic which satisfies the conditions of said (1)-(4). It includes compounds and organic compounds.

By selecting the fusible material 20 as described above, a closed sprinkler head that is environmentally friendly and does not adversely affect the human body or the like can be realized.

Explanatory drawing which showed embodiment of this invention Explanatory drawing which extracted and showed the deflector assembly part of FIG. Assembly exploded view of the heat sensitive body of FIG. Explanatory drawing of the assembly state of the heat sensitive body of FIG. Sectional view taken out of the heat sensitive member of FIG. Explanatory drawing of the thermal operation of embodiment of FIG. Explanatory drawing of other embodiment of the lower casing in this invention Illustration of a conventional closed sprinkler head

Explanation of symbols

1: Body 2: Frame 3: Pipe connection screw 4: Nozzle 5: Deflector 6: Valve body 7: Packing 8: Deflector shaft 8a: Stopper 9: Extension guide 10: Actuating spring 11: Spacer 12: Slider 13: Ball 14: Balancer 15: Thermally sensitive operation part 16: Thermally sensitive body 17a, 17b: Thermal insulation ring 19a, 19b: Heat collecting fin 20: Fusible substance 21: Shaft 22: Nut 24a: Upper casing 24b: Lower casing 25a: Upper surface 25b: Lower surface 26a , 26b: outer surface 27a, 27b: inner surface 28: notch

Claims (7)

In a closed type sprinkler head equipped with a heat sensitive element that starts operation by melting a readily fusible substance by fire heat,
The heat sensitive body is:
A hollow cylindrical body provided with a bore through the ends have a divided split casing so as to include each part of the outer surface,
A closed sprinkler head characterized by having an assembly structure in which the periphery of the fusible substance is wrapped between the divided casings.
The closed sprinkler head according to claim 1, wherein the heat sensitive body is:
A closed-type sprinkler head, wherein fan-shaped heat dissipating fins are integrally formed at each end of the outer surface of the divided casing.
2. The closed sprinkler head according to claim 1, wherein the readily fusible substance is formed of a low melting point alloy, an inorganic compound or an organic compound having a melting point between 50 ° C. and 150 ° C. into a substantially donut shape having a rectangular cross section. A closed sprinkler head characterized by being a molded body.
2. The closed sprinkler head according to claim 1, wherein the readily fusible substance has a melting point between 50 ° C. and 150 ° C., is stable for a long period of time, has low toxicity, and exhibits a highly reactive functional group and toxicity. A closed sprinkler head, which is an inorganic compound having no functional group, not soluble in water, and not sublimable.
5. The closed sprinkler head according to claim 4, wherein the inorganic compound is nickelelide iodide or gallium trichloride.
2. The closed sprinkler head according to claim 1, wherein the readily fusible substance has a melting point between 50 ° C. and 150 ° C., is stable for a long period of time, has low toxicity, and exhibits a highly reactive functional group and toxicity. A closed sprinkler head, which is an organic compound having no functional group, insoluble in water and not sublimable.
The closed sprinkler head according to claim 6, wherein the organic compound is:
α-monostearin,
β-monostearin,
α-monopalmitin,
β-monopalmitin,
2'-methoxyacetoacetanilide,
4- (1-methyl-1-phenylethyl) phenol,
Benzoin isopropyl ether,
Benzoin ethyl ether,
Stearyl phosphate,
Distearyl thiodipropionate,
Triphenyl,
Triphenylphosphine,
N-benzylacetamide,
Triacontán,
2-naphthyl acetate,
Zinc oleate,
Oleic acid amide,
Indolizine,
Dimethyl isophthalate,
Ethylene benzoate,
Phenyl benzoate,
p-tert-butylphenyl salicylate,
p-octylphenyl salicylate,
2-hydroxy-4-methoxybenzophenone,
2,2′-dihydroxy-4-methoxybenzophenone,
2,6-di-t-butyl-4-methylphenol,
A simple substance selected from or a mixture thereof, or
Polyethyl methacrylate,
Polymethacrylate-sec-butyl,
Chroman-indene copolymer,
A closed sprinkler head, which is a synthetic polymer selected from di-n-octyltin maleic acid polymer or alkylphenol formaldehyde resin.

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