JP3865745B2 - Water flow detector for fire fighting equipment - Google Patents

Description

  The present invention is suitable for use in, for example, a sprinkler facility for an apartment house and the like, and relates to a flowing water detection device for a fire extinguishing facility that is small and has good maintainability.

  Conventionally, as shown in FIG. 13, a general sprinkler facility for an apartment house is provided with a plurality of sprinkler heads 1 for each door on each floor of the apartment house, and each head 1 is connected to each other via a sprinkler pipe 1 ′. Connected to the secondary side of the water flow detection device 3, and to the primary side of the water flow detection device 3, the fire-extinguishing water pipes 2 are connected, and each pipe 2 is disposed on the basement of the apartment house. It is connected to a water storage tank 6 through a pump 4 and a pressure holding pump 5. The pipe 2 is connected to a pressure tank 7 and a pressure switch 8 that can detect a pressure drop in the pipe 2 via the pressure tank 7. In addition, 9 in the same figure is an auxiliary water tank of the fire-extinguishing water arrange | positioned on the roof.

  In the sprinkler facility, all the piping is filled with water during a warning operation, and static pressure (0.1 MPa or more at the farthest point from the pressure pump 4) is applied by the pressure holding pump 5, When a fire occurs in the house P, the nozzle of the sprinkler head 1 "automatically fires due to heat, and the fire-extinguishing water filling the pipe 1 'is discharged from the head 1". The reed switch of the flowing water detection device 3 is turned on, and a fire alarm or the like is issued. Further, the pressure switch 8 detects that the pressure in the pipe is lowered due to the firing of the head 1 ″, and the pressure switch 8 is turned on. Is supplied under pressure, and fire extinguishing water is subsequently discharged from the sprinkler head 1 "to perform fire extinguishing activities.

  In such a sprinkler facility, as shown in FIG. 11, the flowing water detection device 3 normally includes a control valve 10, a check valve 11, a paddle, which is a manual open / close valve with a limit switch from the upstream side toward the downstream side. And a flowing water detection valve 12 constituted by a reed switch and the like, and each of these valves constitutes one flowing water detection device 3. Reference numeral 10 ′ denotes a valve opening / closing handle of the control valve 10.

  Alternatively, as shown in FIG. 12, from the upstream side toward the downstream side, a primary short pipe 14 for attaching a pressure gauge 13 for primary side pressure measurement, the control valve 10, the check valve 11, and the flowing water Some are constituted by a secondary short tube 16 for attaching a detection valve 12 and a pressure gauge 15 for measuring a secondary pressure gauge, and each of these valves constitutes one flowing water detection device 3. .

  Here, various configurations of the flowing water detection valve 12 have been proposed. For example, a water flow detection paddle is arranged in the casing of the water flow detection valve 12 alone, and the magnet switch is turned on by rotating the paddle (Patent Document 1), and the water flow is detected on the primary side of the check valve. With an internal paddle (Patent Document 2), a paddle is arranged above the check valve that slides in the vertical direction, and the magnet switch is turned on based on the upward slide of the check valve (Patent Document 3) and the like have been proposed.

  In addition, as a flowing water detection valve, a small water channel is provided in the valve seat of the check valve so that the pressure fluctuation in the small water channel can be detected by a pressure switch, and the pressure fluctuation in the small water channel based on the opening of the check valve is detected. The thing of the structure detected with the said pressure switch is proposed (patent document 4).

JP-A-8-196658 JP 2003-149021 A (FIGS. 1 and 2) Japanese Patent Laid-Open No. 2002-159585 (FIG. 3) Japanese Patent Laying-Open No. 2003-102862 (FIG. 1)

  By the way, since the thing of the said patent document 1 is used as the flowing water detection valve 12 of FIG. 11 or FIG. 12, in order to comprise the flowing water detection apparatus 3, the check valve 11 grade | etc., Is needed separately, and the flowing water detection apparatus 3 There is a problem that the overall vertical length of the apparatus becomes large and the apparatus 3 itself becomes large.

  Moreover, in the thing of the said patent document 2, although a flowing water detection valve and a non-return valve are integrated, the space for water flow detection paddles is needed in the downward position of a non-return valve, and the whole flowing water detection apparatus is small. There is a limit to the conversion.

  Moreover, the thing of patent document 3 turns on a switch using the up-and-down movement of a non-return valve, and although there exists a merit that a housing | casing only for a flowing water detection valve is not required, the magnet switch is used. Therefore, the check valve cannot be moved in a large stroke, and the flowing water resistance when the check valve is open increases.

  In addition, since the thing of patent document 4 is a pressure detection system, when a foreign material etc. mix between a valve body and a valve seat, possibility of malfunctioning is large, and in order to remove a foreign material etc., decomposition | disassembly is required on-site And maintainability is poor.

  Furthermore, the flowing water detection valves described in the above documents 1 to 4 cannot visually check whether the check valve or paddle for detecting the flowing water is open or closed from the outside, and the alarm reed switch When performing the test, it was necessary to actually flow the fire-extinguishing water into the sprinkler equipment piping to form a water flow, and there was a problem that preparation was large and the operation test could not be easily performed.

  The present invention has been made in view of the above-described conventional problems, and it is possible to configure a flowing water detection device in a small size, and to easily perform an operation test of a switch. The purpose is to provide.

In order to achieve the above object, the present invention
An opening portion that is substantially orthogonal to the water flow direction is provided on the secondary side of the check valve housing, and a switch operation rotating arm having an operation portion at both ends is inserted into the housing from the opening portion. The rotating arm is pivotally supported by a horizontal rotating shaft orthogonal to the arm, and the switch operating rotating arm is arranged on the inner side of the casing. The rotating arm is urged to rotate by an urging means so that the operating portion comes into contact with the check valve, and the rotating arm is rotated near the end of the operating portion outside the casing of the rotating arm. Switch means that is turned on by the rotation of the arm is provided, and the check valve is used to resist the urging force of the urging means by the check valve based on the opening operation of the check valve in the opening direction by water flow. So that the switch means can be turned on by the operation portion outside the casing of the rotating arm. It is formed using the fire extinguishing equipment for water flow detection apparatus, characterized in that configured in so that.

  The opening can be constituted by, for example, an opening (29a) of a reed switch mounting sleeve (29). The urging means can be constituted by, for example, a coil spring (34). As the switch means, for example, a reed switch (35) can be used. The operation part inside the casing can be constituted by, for example, a paddle part (31b), and the operation part outside the casing can be constituted by, for example, a switch cam part (31c). When the check valve rotates in the opening direction due to the water flow, the switch operation rotating arm is rotated against the urging force of the urging means, and the switch means is turned on by the operation part outside the casing of the rotating arm. . Therefore, it can be configured to issue a fire alarm or the like when the switch means is turned on.

  Moreover, it is preferable that the operation part inside the said housing of the said switch operation rotation arm is flexible. If comprised in this way, the opening degree of a non-return valve can be taken large by bending an operation part at the time of rotation to the opening direction of a non-return valve, and the valve open state with little flowing water resistance can be implement | achieved.

  Further, it is preferable that the operation portion inside the casing of the switch operation rotating arm is a paddle. This paddle can be constituted by, for example, a paddle part (31b).

  Moreover, it is preferable that the operation part inside the said housing of the said switch operation rotation arm is a coil spring. This coil spring can be constituted by, for example, a coil spring (41a).

  Moreover, it is preferable that the operation part inside the housing of the switch operation rotating arm is a leaf spring. This leaf spring can be constituted by a leaf spring (51a), for example.

  Further, it is preferable that one end of a rotating shaft that pivotally supports the check valve protrudes outside the check valve casing, and the one end can be manually rotated outside the casing. If comprised in this way, a check valve (22) can be manually opened and closed with a rotating shaft (23), and, thereby, a check valve is manually opened and closed and a foreign material etc. are removed easily. In addition, the operation test of the switch means can be easily performed.

  Further, it is preferable that a needle projecting in the radial direction is provided on the rotating shaft located outside the housing, and the needle is provided at a position parallel to the check valve. If comprised in this way, since the pointer rotates at the same angle as the check valve is opened and closed, the opening degree of the check valve can be visually confirmed from the outside of the check valve housing (21).

  Further, it is preferable to provide a through hole for pressure measurement on the wall surface of the secondary side of the check valve housing. This through-hole can be constituted by, for example, a through-hole (21 ″). With such a configuration, a dedicated short pipe for connecting the pressure gauge is not required, so that the entire apparatus can be made compact.

  In addition, although the code | symbol in embodiment was shown in parenthesis corresponding to the structure of this invention, this is displayed for convenience in order to clarify the correspondence, Comprising: The structure of this invention is in embodiment. The configuration is not limited.

  According to the present invention, the check valve can have a flowing water detection function, and the flowing water detection device can be configured to be extremely small.

  In addition, by providing flexibility to the operating part of the switch-operating rotary arm, it is possible to increase the opening of the check valve and to reduce the flow resistance when the valve is opened even if a flow detection function is added. Thus, effective water supply can be realized.

  Since the check valve can be manually opened and closed, foreign matter can be easily removed or an on / off test of the switch means can be easily performed, and a water flow detection device with high safety and maintainability can be realized.

  In addition, the check valve opening (open / closed state) can be visually confirmed from the outside of the check valve housing with the pointer, which is highly maintainable and safe to detect device abnormalities at an early stage. A high water flow detector can be realized.

  Hereinafter, an embodiment of a running water detection device for fire extinguishing equipment according to the present invention will be described in detail.

  FIG. 1 shows a side cross-sectional view of the first embodiment of the upstream water detection device 20, 21 is a check valve housing, and includes an opening 21 a on the primary side and a secondary side in the vertical direction. An opening 21b is formed, and female screw portions 21a ′ and 21b ′ for connection are formed inside the openings 21a and 21b. Reference numeral 21c denotes a sleeve-shaped reed switch mounting portion provided at a rear position perpendicular to the straight line (flow direction F) connecting the openings 21a and 21b. The mounting portion 21c includes the straight line (flow direction F). ) In the direction orthogonal to () is formed. Incidentally, a female screw portion 21c "is formed in the inner surface of the opening portion 21c '.

  A check valve 22 includes a disc-shaped main body 22a and a pair of arm portions 22b extending rearward from the main body 22a (see FIG. 4). The main body 22a is directed to the primary side opening 21a. In this state, the rotation shaft 23 pivotally supported by the casing 21 is inserted into a through hole 22b ′ provided in the arm portion 22b, so that the rotation shaft 23 serves as a support shaft in the directions of arrows A and B. (See FIG. 2). The rotary shaft 23 is inserted into the through-hole 22b 'in a close fitting state, and the check valve 22 can be rotated along with the rotation of the rotary shaft 23.

  Reference numeral 24 denotes a valve seat provided inside the primary side opening 21a. When the check valve 22 is closed, the valve seat 22a receives the lower surface of the valve body 22a and closes the primary side opening 21a.

  Reference numerals 25 and 25 ′ denote bearings provided on the inner surface of the casing 21 (see FIG. 4), and rotatably support both ends of the rotating shaft 23. One of the bearings 25 has a bearing hole 25a penetrating outside the check valve housing 21, and one end 23 'of the rotating shaft 23 projects outside the housing 21 through the bearing hole 25a. A water-stopping packing 26 is mounted between the inner and outer portions of the bearing 25 and the rotary shaft 23, and between the inner portion of the bearing 25 ′ and the rotary shaft 23. The fire extinguishing water is configured not to leak from the bearing hole 25a to the outside.

  Reference numeral 27 denotes a substantially semicircular scale plate, which is fixed to the side surface of the housing 21 on the side from which the rotating shaft 23 protrudes by an attachment angle 27a. The scale plate 27 is fixed so that the substantially semicircular scale portion 27 'is positioned on the front side of the check valve housing 21 (the side opposite to the reed switch housing 30) (see FIG. 3). A through hole 27b is provided in the center portion of the scale plate 27 so that the rotary shaft 23 penetrates the through hole 27b when the scale plate 27 is fixed. On the surface side of the scale plate 27, a scale 27 'indicating the opening degree (opening angle) of the check valve 22 is displayed along an arc (see FIG. 3).

  Reference numeral 28 denotes a dial knob fixed to one end 23 ′ of the rotating shaft 23, and the knob 28 is fixedly connected to the rotating shaft 23. Further, an arrow-shaped pointer 28a is projected and formed in a radial direction from the side surface of the knob 28 (see FIG. 3), and the pointer 28a is positioned on the outer surface side of the scale plate 27 in parallel with the scale plate 27. It is composed. Thus, the scale of the scale portion 27 'can be indicated by the pointer 28a. The pointer 28a may be provided directly on the rotary shaft 23 in the radial direction.

  The pointer 28a is provided on the outer periphery of the knob 28 at a position parallel to the check valve 22 fixed to the rotary shaft 23 (see FIG. 4). Therefore, the position of the check valve 22 can be indicated by the position of the pointer 28a on the scale plate 27.

  With such a configuration, the check knob 22 is rotated in the directions of arrows A and B in the casing 21 by picking the dial knob 28 by hand and rotating the rotary shaft 23 in the directions of arrows A and B. Thus, the opening / closing operation of the valve 22 can be performed manually. Further, the opening degree of the check valve 22 can be visually confirmed by the position of the pointer 28a on the scale plate 27 outside the housing 21.

  Reference numeral 29 denotes a reed switch mounting sleeve having an opening 29a for inserting a rotating arm in the center, and is screwed to the female screw portion 21c ″ with a connecting male screw portion 29b. A reed switch housing 30 is fixedly connected to the rear surface of the sleeve 29.

  Reference numeral 31 denotes a switch-operating turning arm located on the secondary side of the check valve 22 in the check valve housing 21, and is provided in the left-right direction (horizontal direction) at the opening 29 a of the sleeve 29. A rod-like base portion 31a that is pivotally supported by a rotation shaft 32 (a horizontal rotation shaft orthogonal to the rotating arm 31), and an elliptical shape (paddle shape) in plan view provided integrally with the base portion 31a at the distal end portion of the base portion 31a. The paddle portion 31b and a switch cam portion 31c provided integrally with the base portion 31a at the other end portion of the base portion 31a. These rod-shaped base 31a, paddle 31b, and switch cam 31c are made of synthetic resin and formed by integral molding (see FIG. 9A). As will be described later, since the paddle portion 31c needs to be flexible, the paddle portion 31c may be made of, for example, ABS resin, and the rod-like base portion 31a may be made of metal such as SUS.

  Reference numeral 33 denotes a cylindrical spacer, the lower surface of which is bonded and fixed to the upper surface of the check valve 22. This spacer 33 is for adjusting the space | interval of the said paddle part 31b and the said check valve 22 upper surface (refer FIG. 10).

  The switch operating rotary arm 31 is configured such that the paddle portion 31b is positioned on the upper surface side of the check valve 22 in a state where the rod-shaped base portion 31a is pivotally supported by the sleeve 29. , The lower surface of the paddle portion 31 b is placed on the upper surface of the spacer 33.

  A coil spring 34 has one end 34 a connected to the upper portion of the switch cam portion 31 c and the other end 34 b fixed to a suitable position on the upper surface of the inner surface of the reed switch housing 30 with the spring 33 contracted. That is, the coil spring 34 always applies an urging force in the direction of the arrow C to the switch cam portion 31c, whereby the urging force (in the direction of the arrow D about the rotation shaft 32 is applied to the rotating arm 31). In this state, the rotating arm 31 is positioned substantially horizontally as shown in FIG. 1 and maintains the state where the lower surface of the paddle portion 31b is in contact with the upper surface of the spacer 33. It is configured.

  The paddle portion 31b is formed thinner than the rod-shaped base portion 31a and the switch cam portion 31c, so that the paddle portion 31b has flexibility as shown in FIG. 9 (a). Is formed.

  Reference numeral 35 denotes a reed switch installed in the reed switch housing 30 and is composed of a pair of terminal pieces 35a and 35b which are always in a non-contact state. The reed switch 35 is turned on by being pressed by the switch cam portion 31c when the check valve 22 is opened and the rotating arm 31 is rotated in the direction of arrow E by the rotating shaft 32. It is configured (see FIG. 2). For example, a fire alarm is connected to the output terminals a and b connected to the terminal pieces 35a and 35b, and the rotation arm 31 rotates (in the direction of arrow A) based on the opening of the check valve 22 (in the direction of arrow A). The reed switch 35 is turned on in the direction of arrow E), so that a warning that a fire has occurred can be issued. In addition, it may be configured such that the fire-fed water in the fire-extinguishing tank 6 can be fed into the pipe 2 by activating the pressurized water pump 4 together with the operation of the fire alarm based on the switch 35 being turned on.

  A rubber packing 36 is formed by integral molding, and is provided at a cylindrical main body 36a attached in close contact with the base 31a of the rotating arm 31, and at one end of the main body 36a. The flange portion 36b is adhered to the inner surface of the portion 21c in a close contact state. The rubber packing 36 stops water so that the water in the check valve housing 21 does not enter the reed switch housing 30 and is flexibly deformed even when the rotating arm 31 rotates. The water state is maintained (see FIG. 2).

  FIG. 5 shows a case where the flowing water detection device 20 according to the present invention is installed as a sprinkler facility in an apartment house, and a manual opening / closing valve with a limit switch is provided in the primary side opening 21a of the flowing water detection device 20 ( Control valve) 10 is connected. A pipe 1 ′ to which the sprinkler head 1 is connected is connected to the secondary side of the flowing water detection device 20, and a pipe 2 from the water storage tank 6 is connected to the primary side of the control valve 10.

  Since the flowing water detection device of the present invention is configured as described above, its operation will be described next.

  As shown in FIG. 5, the flowing water detection device 20 is arranged at each door of the apartment house with the control valve 10 connected to the primary side, and the sprinkler pipe 1 ′ is connected to the secondary side and the control valve It is assumed that the pipe 2 from the water storage tank 6 is connected to the primary side 10 and is installed in the state shown in FIG. 13 as a whole. In FIG. 13, it is assumed that the water flow detection device 3 of the same figure is configured by the water flow detection device 20 and the control valve 10. Moreover, the inside of the said piping 2, piping 1 ', the control valve 10, and the flowing water detection apparatus 20 is filled with fire extinguishing water, and the fire warning state to which static pressure (0.1 MPa or more at the terminal) was applied by the pressure holding pump 5 Is assumed to be maintained.

  In this fire alarm state, for example, when a fire occurs in the area P of FIG. 13 and a specific sprinkler head (for example, sprinkler head 1 ″) fires due to the fire, the fire extinguishing water filled in the pipe 1 ′ is It is discharged from the head 1 ″, thereby reducing the pressure on the secondary side of the water flow detection device 20, and thereby a water flow (in the direction of arrow F) from the primary side to the secondary side is generated in the water flow detection device 20.

  Then, the check valve 22 in the check valve housing 21 is rotated in the direction of arrow A by the water flow, and the paddle portion 31b is also pushed in the same direction via the spacer 33. The arm 31 rotates in the direction of arrow E about the rotation shaft 32 against the urging force of the coil spring 34 (see FIGS. 1 to 2).

  Due to this turning operation, the switch cam portion 31c turns from the state of FIG. 1 to the state of FIG. 2 in the direction of arrow E, so that the rear end of the cam portion 31c contacts the reed switch 35 and turns on the switch 35. This alerts the resident that the alarm has been activated and a fire has occurred.

  Further, the pressure drop in the pipes 1 ′ and 2 due to the firing of the head 1 ″ is detected by the pressure switch 8 via the pressure tank 7, and the pressurized water pump 4 is driven based on the detection, thereby continuing. The fire extinguishing water in the water storage tank 6 is pressure-fed into the pipe 2, and the fire extinguishing water thus sent is continuously discharged from the sprinkler head 1 ″ and the fire extinguishing operation is continued.

  The reed switch 35 is turned on by the switch cam portion 31c based on the rotation of the rotating arm 31 in the direction of arrow E at the position of the two-dot chain line of the paddle portion 31b in FIG. Thereafter, the check valve 22 is continuously rotated in the direction of arrow A by the flowing water pressure to increase the opening thereof, and a force in the direction of arrow E is further applied to the paddle portion 31b. As a result, the check valve 22 is further rotated in the direction of arrow A while bending the paddle portion 31b to increase the opening, and is opened to the solid line position in FIG. At this time, the paddle portion 31b is in the position of the solid line in FIG. 2 bent from the position of the two-dot chain line. Therefore, the degree of opening of the check valve 22 is increased by the flexibility of the paddle portion 31b, and a valve open state with lower running water resistance is realized. Therefore, fire-extinguishing water can be sent efficiently.

  The turning of the check valve 22 by the flowing water rotates the rotary shaft 23 of the check valve 22 in the same direction, so that the pointer 28 a is turned to the same opening angle as the check valve 22. Therefore, as shown in FIG. 3, the opening angle of the check valve 22 can be visually confirmed by the angle of the pointer 28 a outside the housing 21.

  Further, when a foreign matter (such as pipe chips or other garbage under construction) is caught between the check valve 22 and the valve seat 24 for some reason, the dial knob 28 is picked and the arrow A or B is moved in the direction of arrows A or B. By rotating and rotating, the check valve 22 can be manually rotated in the direction of the arrow A or B, whereby foreign matters and the like can be easily removed.

  Further, before the fire occurs, the reed switch 35 can be turned on and off by picking up the dial knob 28 with a finger and rotating it in the directions of arrows A and B to a predetermined angle, thereby extinguishing the fire in the pipe. The on / off test of the reed switch 35 can be easily performed without being filled with water.

  Next, FIG. 6 shows a second embodiment of the flowing water detection apparatus according to the present invention. Note that in the second embodiment described below, the same portions as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted for convenience.

  In FIG. 6, reference numeral 40 denotes a running water detection device according to this embodiment, and 41 denotes a switch operation turning arm of the running water detection device 40. The switch-operating rotary arm 41 has the same structure as the rotary arm 31 in the first embodiment except that the rod-shaped base 31a and the switch cam 31c are configured in place of the paddle 31b of the rotary arm 31. A coil spring 41a is used. That is, one end of the coil spring 41a is connected and fixed to the tip of the base portion 31a, and the other end of the coil spring 41a is positioned on the upper side (secondary side) of the check valve 22.

  Reference numeral 42 denotes a guide rail having a U-shaped cross section fixed to the center of the upper surface of the check valve 22, and guides both left and right sides of the coil spring 41a by guide plates 42a and 42a 'facing in the left-right direction. Is.

  Reference numeral 43 denotes a spacer provided in the guide rail 42, which has a ring shape similar to that of the spacer 33 of the first embodiment (see FIG. 10). The lower surface of the spacer 43 is fixed to the bottom surface of the guide rail 42, and the coil spring 41a is placed on the upper surface. That is, the coil spring 41a is configured such that the upper portions of the guide plates 42a and 42a 'are positioned on both sides of the coil spring 41a while being placed on the spacer 43 (see FIG. 6C).

  As in the first embodiment, the switch operating pivot arm 41 is given a rotational force in the direction of arrow D about the rotation shaft 32 by the coil spring 34, and in this state, the coil spring 41a The spacer 43 is in contact with the upper surface of the spacer 43. The coil spring 41a is composed of a relatively thick iron wire, and even when urged in the direction of arrow D by the coil spring 34, the tip of the coil spring 41a is maintained while maintaining a straight state as shown in FIG. The part is in contact with the spacer 43.

  In such a state, the sprinkler head 1 "fires due to a fire, and the fire extinguishing water in the pipe 1 'is discharged from the head 1", thereby lowering the pressure on the secondary side of the water flow detection device 40, and the water flow detection device. A water flow from the primary side to the secondary side of 40 occurs. Then, as in the first embodiment, the check valve 22 is rotated in the direction of arrow A by the water flow, so that the coil spring 41a is also pushed in the same direction via the spacer 43. The arm 41 rotates against the urging force of the coil spring 34 in the direction of arrow E around the rotation shaft 32, and the reed switch 35 is turned on by the rotation of the switch cam portion 31c based on this rotation operation. An alarm is activated to inform the residents that a fire has occurred. The subsequent drive operation and fire extinguishing operation of the pressurized water pump 4 are the same as those in the first embodiment.

  Also in the second embodiment, after the reed switch 35 is turned on by turning the turning arm 41, a force in the direction of arrow E is continuously applied to the coil spring 41a by the flowing water. While the coil spring 41a is bent (see FIG. 9B), the valve 22 is further rotated in the direction of arrow A to increase the opening, and is opened to a position substantially the same as the solid line position in FIG. . Therefore, the opening degree of the check valve 21 is increased by the flexibility of the coil spring 41a, and a valve open state with lower running water resistance can be realized.

  The index function by the pointer 28a, the foreign matter removal function by turning the dial knob 28, and the on / off test function of the reed switch 35 are the same as those in the first embodiment.

  Next, FIG. 7 shows a third embodiment of the flowing water detection apparatus according to the present invention. Note that in the third embodiment described below, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted for convenience.

  In FIG. 7, reference numeral 50 denotes a flowing water detection device in the embodiment, 51 denotes a switch operation turning arm in the embodiment, and the turning arm 51 includes the rod-like base portion 31a and the switch cam portion 31c as described above. Although it is the same as the arm 31, it replaces with the paddle part 31b in the said 1st Embodiment, or the coil spring 41a of the said 2nd Embodiment, and uses the leaf | plate spring 51a. That is, one end of the leaf spring 51a is connected and fixed to the distal end portion of the base portion 31a, and the other end portion of the leaf spring 51a is bent downward in a loop shape to form a curved portion 51a ′. The lower surface of 'is configured to come into contact with the bottom surface of the guide rail 42.

  The guide rail 42 in the second embodiment is fixed to the upper surface of the check valve 22, and the curved portion 51 a ′ is positioned between the left and right guide plates 42 a and 42 a ′ of the guide rail 42. It is configured. That is, in the third embodiment, the curved portion 51a 'as a spacer is integrally provided at the tip of the leaf spring 51a, and therefore a spacer as a single component is not required.

  The configurations of the base 31a and the switch cam portion 31c of the switch operating rotary arm 51 are the same as those in the first embodiment. As in the above embodiments, the rotary arm 51 is connected to the coil spring 34 by the coil spring 34. A rotational force in the direction of arrow D is applied around the rotation shaft 32, and the lower surface of the curved portion 51a 'of the leaf spring 51a is in contact with the bottom surface of the guide rail 42 in that state.

  In such a state, when a predetermined sprinkler head 1 ″ fires due to a fire, the pressure on the secondary side of the water flow detection device 50 decreases, and a water flow from the primary side to the secondary side of the water flow detection device 50 occurs, the above-mentioned As in the first and second embodiments, the check valve 22 is rotated in the direction of arrow A by the water flow, so that the rotating arm 51 resists the urging force of the coil spring 34 via the leaf spring 51a. The revolving switch 32 is rotated in the direction of the arrow E around the rotation shaft 32, and the reed switch 35 is turned on by the contact of the switch cam portion 31c by this rotating operation. The subsequent drive operation of the pressurized water pump 4 is the same as that of the first embodiment.

  Also in the third embodiment, after the reed switch 35 is turned on by the rotation of the rotating arm 50, the check valve 22 is continuously rotated in the direction of arrow A by the flowing water. A force in the direction of arrow A is applied to the leaf spring 51a. As a result, the check valve 22 further turns (arrow) while bending the leaf spring 51a in the turning direction (arrow E direction) (FIG. 9C). A direction) is increased, and the opening is increased to a state where the opening is opened to substantially the same angle as the solid line position in FIG. Therefore, the opening degree of the check valve 22 is increased by the flexibility of the leaf spring 51a, and a valve open state with lower running water resistance can be realized.

  The index function by the pointer 28a, the foreign matter removal function by turning the dial knob 28, and the on / off test function of the reed switch 35 are the same as those in the first embodiment.

  FIG. 8 shows a fourth embodiment of the flowing water detection apparatus according to the present invention, in which a pressure gauge is connected to the flowing water detection apparatus. That is, a short pipe 60 for connecting a pressure gauge is connected to the primary side of the control valve 10 connected to the primary side of the flowing water detection apparatus 20 according to the present invention, and the primary side pressure gauge 61 is connected to the short pipe 60 by a pipe 61 ′. Connect with. On the other hand, a through-hole 21 ″ is provided in the wall surface of the secondary-side space of the check valve housing 21 of the water flow detection device 20, and a secondary-side pressure gauge 62 is connected to the through-hole 21 ″ by a pipe 62 ′. To do.

  If comprised in this way, it is not necessary to provide the short tube 16 only for the secondary side pressure gauge 15 in the secondary side of the flowing water detection valve 12 like the prior art shown in FIG. The sprinkler pipe 1 'can be directly connected to the apparatus, and the entire apparatus can be made extremely compact. In addition, the flowing water detection apparatus in the said embodiment may be any of the flowing water detection apparatus 20 in the said 1st Embodiment, the flowing water detection apparatus 40 in the said 2nd Embodiment, or the flowing water detection apparatus 50 in the said 3rd Embodiment. .

  As described above, according to the present invention, the check valve housing 21 can have a flowing water detection function, and the flowing water detection device can be configured to be extremely small.

  In addition, by providing flexibility to the operation portion (paddle portion 31b, coil spring 41a, leaf spring 51a, etc.) of the switch operation turning arm 31, the opening of the check valve 22 can be widened. Even if the water flow detection function is added, the water flow resistance when the valve is opened can be lowered. Thereby, fire-extinguishing water can be sent effectively.

  In addition, since the check valve 22 can be manually opened and closed, it is possible to easily perform the manual operation without removing foreign matter or the on / off test of the reed switch 35 into the pipe, and maintainability. A highly safe flowing water detection device can be realized.

  Further, the opening degree of the check valve 22 can be visually confirmed from the outside of the check valve housing 21 by the pointer 28a, so that it is highly safe to detect an abnormality of the apparatus at an early stage, and is easy to maintain. A good water flow detector can be realized. In FIG. 8, 63 is a discharge valve.

It is side surface sectional drawing of the fire alert state of the flowing water detection apparatus for fire extinguishing facilities which concerns on this invention. It is side surface sectional drawing at the time of the fire outbreak of a detection apparatus same as the above. It is a side view of a detection apparatus same as the above. It is a cross-sectional top view of a detection apparatus same as the above. It is a side view of the said detection apparatus which shows the state which connected the control valve to the detection apparatus same as the above. FIG. 2 shows a second embodiment of the detection device, wherein (a) is a plan view of a switch operating rotation arm of the device, (b) is a side sectional view of the device, and (c) is a view of the device. It is a longitudinal cross-sectional view. The 3rd Embodiment of a detection apparatus same as the above is shown, (a) is a top view of the rotation arm for switch operation of the same apparatus, (b) is side sectional drawing of the non-return valve vicinity of the same apparatus. It is a side view of the said detection apparatus which shows the state which connected the control valve to the detection apparatus same as the above, and connected the pressure gauge. Both are side views of the switch-operating rotary arm, in which (a) shows the first embodiment, (b) shows the second embodiment, and (c) shows the third embodiment. It is a perspective view of the spacer of an apparatus same as the above. It is a side view of the conventional flowing water detection apparatus. It is a side view of the conventional flowing water detection apparatus. It is a figure which shows the whole structure of the sprinkler equipment in an apartment house.

Explanation of symbols

20, 40, 50 Flowing water detection device 21 Check valve housing 21 "Through hole 21c 'Opening 22 Check valve 31, 41, 51 Turning arm for switch operation 31a Rod base 31b Paddle part 31c Switch cam part 32 Rotating shaft 34 Coil spring 35 Reed switch 41a Coil spring 51a Leaf spring

Claims (8)

An opening substantially orthogonal to the water flow direction is provided on the secondary side of the check valve housing,
A switch-operating turning arm having operating portions at both ends is inserted into the housing through the opening, and the both-end operating portions are disposed so as to be located inside and outside the housing, respectively, and further, a horizontal arm orthogonal to the arms The rotating arm is pivotally supported by a rotating shaft so as to be rotatable,
Rotating and energizing the rotating arm with an urging means so that the operation part inside the casing of the rotating arm for operating the switch comes into contact with the check valve,
In addition, a switch means that is turned on by the rotation of the rotating arm is disposed in the vicinity of the end of the operation unit outside the casing of the rotating arm,
Based on the opening operation of the check valve in the opening direction by water flow, the check valve is configured to be able to rotate the rotating arm against the urging force of the urging means. A water flow detection device for fire extinguishing equipment, characterized in that the switch means can be turned on by the operation section outside the casing of the moving arm.   2. The water flow detection device for fire extinguishing equipment according to claim 1, wherein an operation portion inside the casing of the switch operation rotating arm has flexibility.   The water flow detecting device for fire extinguishing equipment according to claim 1 or 2, wherein the operation part inside the casing of the turning arm for switch operation is a paddle.   The water flow detection device for a fire extinguishing equipment according to claim 1 or 2, wherein the operation portion inside the casing of the switch operation rotating arm is a coil spring.   3. The water flow detection device for fire extinguishing equipment according to claim 1, wherein the operation part inside the housing of the turning arm for operating the switch is a leaf spring.   6. One end of a rotating shaft that pivotally supports the check valve protrudes outside the check valve casing, and the one end can be manually rotated outside the casing. The water flow detection device for fire extinguishing equipment according to any one of the above.   The guide shaft protruding in the radial direction is provided on the rotation shaft of the check valve located outside the housing, and the pointer is provided at a position parallel to the check valve. 6. A flowing water detection device for fire extinguishing equipment according to 6.   The water flow detection device for fire extinguishing equipment according to any one of claims 1 to 7, wherein a through hole for pressure measurement is provided on a wall surface of a secondary side of the check valve housing.

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