JP2006118905A - Flowing water detector, and sprinkler facility - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flowing water detector capable of reducing an installation space of the flowing water detector, and capable of detecting easily and surely flowing water due to an operation of a sprinkler head. <P>SOLUTION: In this flowing water detector of a swing chuck structure wherein an inside is partitioned into a primary side I connected to a water source, and a secondary side II equipped with the sprinkler head 4, by a partitioning wall 7, wherein a valve element 9 is provided to open and close a communication port 8 drilled in the partitioning wall 7, and wherein the valve element 9 is turned, a small valve 14 is provided to be turned coaxially with the valve element 9, a small valve opening detection means is provided to detect a turning angle of the small valve 14, and a valve element holding means 28 is installed to hold the valve element 9 in a close condition. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to a running water detection device installed in a sprinkler facility.

In sprinkler equipment, a sprinkler head installed on the ceiling of a building and the water source are connected by piping, and when a fire breaks out, the sprinkler head installed near the fire operates to supply fire extinguishing water in the piping. The fire is extinguished by spraying, pumping water from the water source, and continuously sprinkling water.

In the sprinkler facility, a water flow detector is installed between the water source and the sprinkler head. The flowing water detection device detects flowing water generated by the operation of the aforementioned sprinkler head and generates a flowing water signal. The water flow signal activates a pump for supplying water to a sprinkler head operated from a water source, or informs that a fire has occurred in a building.

The water flow detector is divided into a primary side chamber and a secondary side chamber by a partition, and the primary side chamber is connected to the primary side piping following the water source, and the secondary side chamber is the secondary side piping where the sprinkler head is installed. It is connected to the. A communication port is provided in the partition wall, and a valve body that opens and closes the communication port is provided to be supported by the secondary side chamber.

The flowing water detection device detects the flowing water generated by the operation of the sprinkler head installed on the secondary side as described above, but as one means for detecting the flowing water, the valve stem that supports the valve body is supported. There is one that detects running water by the rotation operation of (see, for example, Patent Document 1).

In the above-mentioned water flow detection device, the water in the secondary side pipe flows out of the activated sprinkler head by the operation of the sprinkler head, so the pressure in the secondary side chamber decreases in the water flow detection device, and the valve body from the primary side chamber The phenomenon in which the valve body rotates due to the pressure of water pushing up the valve is detected by the rotation of the valve shaft.

However, since the amount of water that flows when the sprinkler head operates is constant, there is a problem that when the caliber size of the water flow detector increases, the amount of opening of the valve body decreases and it is difficult to detect the rotation angle of the valve body. It was.

In order to solve the above problem of the water flow detection device, a small-diameter bypass pipe communicating the primary side chamber and the secondary side chamber of the water flow detection device is provided, and a small valve provided on the bypass pipe by the water flow caused by the operation of the sprinkler head. Is detected and the running water signal is generated.

JP-A-7-265454 (page 3-4, FIG. 2) JP-A-8-117357 (page 3-4, FIG. 1)

However, the above-described flowing water detection device has a problem in that the external dimensions of the flowing water detection device increase due to the provision of the bypass pipe. In particular, in recent years, the installation space for the flowing water detection device tends to be narrow, and a product with a small installation space is required.

In view of the above problems, an object of the present invention is to provide a water flow detection device that can save space and can easily and reliably detect water flow caused by the operation of a sprinkler head.

In order to achieve the above object, the invention described in claim 1 is divided into a primary side where the interior is connected to the water source and a secondary side where the sprinkler head is installed, and the partition is perforated. In the water flow detection device having a swing check structure in which a valve body that opens and closes the communication port is provided and the valve body rotates, a small valve that rotates coaxially with the valve body is installed. It is a flowing water detection apparatus which provided the small valve opening detection means which detects the rotation angle of.

Invention of Claim 2 is the flowing water detection apparatus of Claim 1 in which the valve body holding means which hold | maintains a valve body in a closed state is installed in the said flowing water detection apparatus.

The invention according to claim 3 is the water flow detection device according to claim 2, wherein the valve body holding means is a passage that leads from a hole formed in the valve seat surface to the outside.

The invention described in claim 4 is a sprinkler facility in which the flowing water detection device described in claims 1 and 2 is installed, and is a sprinkler facility in which the valve body holding means is released by the operation of the small valve opening detection means. .

The invention according to claim 5 is a sprinkler facility in which the water flow detection device according to claim 1 or 2 is installed, and the valve body holding means is released by the operation of the fire detector installed in the vicinity of the sprinkler head. Sprinkler equipment.

According to the first aspect of the present invention, since the flowing water is detected by the small valve that rotates coaxially with the valve body, the space for providing the bypass pipe as in the conventional product is omitted, and it can be installed in a narrow place. A flowing water detection device can be provided.

According to the second aspect of the present invention, when the sprinkler head is actuated by providing the valve body holding means, only the small valve can be opened and the flowing water can be reliably detected.

According to the third aspect of the present invention, since the valve body holding means is a passage that leads from the hole formed in the valve seat surface to the outside, the pressure in the hole becomes equal to the atmospheric pressure. Since the force that acts on the valve body in the closing direction is generated by the difference in pressure in the secondary side chamber, there is an effect that the valve body can be kept in the closed state at all times.

According to the fourth aspect of the present invention, the release of the valve body holding means is performed by the flowing water detection signal by the rotation of the small valve. It is possible to prevent the valve body and the small valve of the flowing water detection device other than the activated water valve from rotating and generating a flowing water signal.

According to the fifth aspect of the present invention, the condition for releasing the valve body holding means is the fire sensor activation signal, so that when the sprinkler head malfunctions other than during a fire, Since the holding state is maintained, the fire extinguishing water on the primary side can flow to the secondary side only with a limited amount of water, thereby reducing water damage damage.

Embodiment 1 of the present invention will be described below with reference to FIGS. 1 is a system diagram of a sprinkler facility in which the water flow detection device of the first embodiment is installed, FIG. 2 is a cross-sectional view of the water flow detection device of the first embodiment, FIG. 3 is a plan view of a valve body and a valve shaft, and FIG. It is a perspective view explaining the structure of a valve and a valve stem.

The sprinkler facility shown in FIG. 1 includes a water source 1, a pump 2, a running water detection device 3, and a sprinkler head 4.

The water source 1 is a water tank for storing water used for fire extinguishing, and a large amount of water is stored so that water is continuously sprayed from the sprinkler head 4 when the pump 2 is activated.

As described above, the pump 2 pumps the water from the water source 1, passes through the primary side pipe 5, the flowing water detection device 3, and the secondary side pipe 6, and sends it to the activated sprinkler head 4.

The flowing water detection device 3 has a partition wall 7 as shown in FIGS. 2 to 4 and is divided into a primary side chamber I and a secondary side chamber II. A communication port 8 is formed in the partition wall 7. In the secondary side chamber II, a valve body 9 for opening and closing the communication port 8 is rotatably supported by shafts 10 and 11.

The valve body 9 has a disk shape, and bearings 12 and 12 through which the shafts 10 and 11 are penetrated are formed in a part of the periphery. The valve body 9 is provided with a hole 13 for communicating the primary side chamber I and the secondary side chamber II, and a small valve 14 for opening and closing the hole 13 is pivotally supported by the shafts 10 and 11 described above. Is provided.

The shaft 10 is a rod having a circular cross section, and has a step portion 15 at an intermediate portion. The cross section has a small diameter on the tip side from the step portion. A head 16 having a hexagonal portion is formed at the end opposite to the tip, a male screw 17 is formed on the tip side from the head, and the female screw 17 is engraved in the valve box. The shaft 10 is fixedly installed on the valve box by screwing.

The shaft 11 is a rod having a circular cross section, and two parallel flat surfaces 18 are formed on the peripheral surface of the distal end on the small valve 14 side. A similar two-plane 19 is also formed at the end of one valve box projecting to the outside. The middle portion is a large diameter portion 20 that is slightly larger than the diameter of both ends. The end surface of the large-diameter portion 20 is locked by a lock nut 20A so that the shaft 11 does not come out of the valve box. A male screw 21 is threaded on the tip peripheral surface on the two planes 19 side.

The shafts 10 and 11 are inserted into the valve box from positions facing each other, pass through the bearings 12 and 12 of the valve body 9 and are fitted into the bearings 22 and 23 of the small valve 14. The bearing 22 into which the shaft 10 is inserted is larger in diameter than the diameter on the tip side from the step portion 15 of the shaft 10, and between the inner diameter of the bearing 22 and the outer diameter on the tip side from the step portion 15 of the shaft 10. There is a gap.

The bearing 23 into which the shaft 11 is inserted is formed with a vertical groove 24 into which the two flat surfaces 18 formed at the tip of the shaft 11 are inserted. When the small valve 14 rotates with the two planes 18 and the vertical groove 24 fitted, the shaft 11 also rotates.

The two planes 19 formed at the tip of the shaft 11 on the side protruding to the outside of the valve box have the same through-hole as the cross-sectional shape of the two planes 19 at the center, and the cam 25 is formed with an arc portion at the periphery. Is inserted and fixed by a nut 26. When the small valve 14 rotates, the cam 25 fixed to the shaft 11 also rotates, and the arc portion of the cam 25 presses the actuator 27A of the limit switch 27 installed in the vicinity of the cam 25, and the limit switch 27 is activated. To do.

At that time, it is desirable that the limit switch 27 is operated near the angle at which the small valve 14 is rotated by the amount of water flowing when one sprinkler head 4 is operated.

As described above, the limit switch 27 is actuated by the rotation of the small valve 14 and a signal is output. However, when the valve body 9 is rotated by vibration of water in the pipe, it is installed on the valve body 9. The small valve 14 that has been turned may also rotate, and the limit switch 27 may be activated. In order to prevent this, the valve body 9 is urged in the closing direction by the torsion coil springs 28 and 28 as holding means for the valve body 9.

In addition to the torsion coil spring 28, a magnet or weight can be used as the holding means for the valve body 9.

The sprinkler head 4 disperses the water in the piping by opening the internal valve body by heat at the time of fire. As for the structure of the sprinkler head, there is one described in JP-A-7-284545.

Then, the action | operation of the sprinkler installation in which the flowing water detection apparatus of Example 1 was installed is demonstrated.

The sprinkler facility in which the water flow detection device of Example 1 is installed is in a state where the inside of the pipe is filled with water during normal times. When a fire occurs, the sprinkler head 4 installed in the vicinity of the fire is actuated to spray the water filled in the secondary side pipe 6. Since the water in the secondary side pipe 6 flows out from the activated sprinkler head 4, the pressure of the water in the secondary side pipe 6 gradually decreases.

Similarly, since the water pressure in the secondary side chamber II of the flowing water detection device 3 connected to the secondary side pipe 6 also decreases, the valve body 9 and the small valve 14 act in the closing direction from the secondary side chamber II side. The force decreases, and the force for rotating the valve body 9 and the small valve 14 from the primary side chamber I side becomes larger. However, since the valve body 9 is biased by the torsion coil spring 28 in the direction in which the valve body 9 is closed, only the small valve 14 rotates and water flows from the primary side chamber I to the secondary side chamber II.

As the small valve 14 is rotated, the shaft 11 and the cam 25 are also rotated and the limit switch 27 is operated. When the limit switch 27 is operated, a running water signal is output, and the pump 2 is activated to start water supply to the sprinkler head 4 operated from the water source 1.

When the pressurized water is sent by the activation of the pump 2, the force by which the torsion coil spring 28 presses the valve element 9 in the closing direction exceeds the force by which the valve element 9 is opened in the opening direction, and the valve element 9 rotates. Since a sufficient amount of water is supplied from the primary side pipe 5 to the secondary side pipe 6, water is continuously sprayed from the activated sprinkler head 4, and the fire can be suppressed.

Next, the flowing water detection apparatus and sprinkler facility of Example 2 will be described with reference to FIG. FIG. 5 is a cross-sectional view of the flowing water detection device according to the second embodiment.

Since the sprinkler equipment of Example 2 is the same as that of Example 1, description is abbreviate | omitted. Since the flowing water detection device according to the second embodiment has substantially the same structure as the flowing water detection device according to the first embodiment, portions having the same structure are denoted by the same reference numerals and description thereof is omitted. The difference from the flowing water detection device of the first embodiment is that a hole is formed in the valve seat and an annular intermediate chamber is formed at the back of the hole and communicates with the outside.

In the flowing water detection device shown in FIG. 5, when the communication port 8 is closed by the valve body 9, the valve body 9 is seated on the upper surface of the flange-shaped valve seat 100. A plurality of holes 101 are formed in the valve seat 100 so as to penetrate the flange portion up and down. Around the hole 101, an O-ring that is a water-stopping member is installed to prevent water from flowing into the hole 101 when the valve body 9 is closed.

An intermediate chamber 102 that is an annular space is formed on the lower end side of the hole 101, and the intermediate chamber 102 continues to a water channel 103 that leads to the outside. Therefore, the pressure in the intermediate chamber 102 is equal to the atmospheric pressure.

Then, the action | operation of the sprinkler installation in which the flowing water detection apparatus of Example 2 was installed is demonstrated.

The sprinkler facility in which the water flow detection device according to the second embodiment is installed is in a state where the inside of the pipe is filled with water during normal times. When a fire occurs, the sprinkler head 4 installed in the vicinity of the fire is actuated to spray the water filled in the secondary side pipe 6. Since the water in the secondary side pipe 6 flows out from the activated sprinkler head 4, the pressure of the water in the secondary side pipe 6 gradually decreases.

Similarly, since the water pressure in the secondary side chamber II of the flowing water detection device 3 connected to the secondary side pipe 6 also decreases, the valve body 9 and the small valve 14 act in the closing direction from the secondary side chamber II side. The force decreases, and the force for rotating the valve body 9 and the small valve 14 from the primary side chamber I side becomes larger. However, since the pressure in the hole 101 formed in the valve seat 100 and the intermediate chamber 102 is equal to the atmospheric pressure, the valve body 9 is caused by the force generated by the pressure difference between the intermediate chamber 102 and the secondary side chamber II. Since the force acts in the closing direction, only the small valve 14 rotates and water flows from the primary side chamber I to the secondary side chamber II.

As the small valve 14 is rotated, the shaft 11 and the cam 25 are also rotated and the limit switch 27 is operated. When the limit switch 27 is operated, a running water signal is output, and the pump 2 is activated to start water supply to the sprinkler head 4 operated from the water source 1.

When pressurized water is sent by the activation of the pump 2, the valve body by the pressurized water is opened in the direction of opening rather than the force acting on the valve body 9 by the pressure difference between the intermediate chamber 102 and the secondary side chamber II in the closing direction. Since the pressing force exceeds, the valve body 9 rotates and a sufficient amount of water is supplied from the primary side pipe 5 to the secondary side pipe 6, so that water is continuously sprayed from the activated sprinkler head 4, Can suppress the fire.

Next, the flowing water detection device and sprinkler facility of Example 3 will be described with reference to FIGS. 6 to 8. 6 is a system diagram of a sprinkler facility in which the water flow detection device of the third embodiment is installed, FIG. 7 is a sectional view of the water flow detection device of the third embodiment, and FIG. 8 is a state in which the valve body holding means in FIG. .

As shown in FIG. 6, the sprinkler facility of the third embodiment is provided with a fire detector K in the vicinity of the sprinkler head 4, and when the fire detector K outputs a fire signal, the valve body holding means is provided. Is to cancel.

In addition to the configuration of the flowing water detection device of the first embodiment, the flowing water detection device of the third embodiment includes a lever 30 as a holding means for the valve body 9 and a piston mechanism 31 that holds and releases the locking of the valve body 9 by the lever 30. Consists of

The lever 30 shown in FIG. 7 has an L shape, one end of which is pivotally supported, and the other end is locked to the upper peripheral edge of the valve body 9 so as to prevent the valve body 9 from rotating. It is in the state. The lever 30 is biased by a torsion coil spring 32 so as to rotate counterclockwise in FIG.

However, since the lever 30 is prevented from rotating counterclockwise by the push rod 33 of the piston mechanism 31, the lever 30 is in a state where the valve body 9 is locked.

The piston mechanism 31 includes a push rod 33, a piston 34, and a chamber 35.

One end of the push rod 33 can freely enter and exit the secondary side chamber II, and the other end is fixed to a piston 34 that can slide in the chamber 35. The chamber 35 is a space provided outside the secondary side chamber II, and has two connection ports 36A and 36B.

A pipe 37 is connected to the connection port 36A and communicates with the primary side chamber I. An orifice 38 and a check valve 39 are provided on the pipe 37, and the amount of water flowing from the primary side chamber I into the chamber 35 is regulated by the orifice 38. The check valve 39 is provided so that the water in the chamber 35 does not flow back to the primary side chamber I.

A drain pipe 40 is connected to the connection port 36 </ b> B, and an electromagnetic valve 41 that is normally closed is provided on the drain pipe 40. Since the solenoid valve 41 is closed at normal times, the chamber 35 is filled with water, and the piston 34 is moved to the left side in the drawing. Further, the push rod 33 fixed to the piston 34 also protrudes into the secondary side chamber II, and the tip of the push rod 33 presses the lever 30.

Then, the action | operation of the sprinkler installation in which the flowing water detection apparatus of Example 3 was installed is demonstrated.

The sprinkler equipment in which the water flow detection device according to the third embodiment is installed has a structure in which the lever 30 that locks the valve body 9 is released by the operation of the fire detector K installed in the vicinity of the sprinkler head 4 as described above. ing. During normal times, the primary side pipe 5 and the secondary side pipe 6 are filled with water, and the valve body 9 is closed due to the locking of the lever 30 and the biasing of the torsion coil spring 28.

When a fire occurs, the fire detector K is activated to open the solenoid valve 41. By opening the electromagnetic valve 41, the water in the chamber 35 is discharged to the outside through the drain pipe 40, and the piston 34 moves to the right as shown in FIG. Similarly, the push rod 33 fixed to the piston 34 also moves to the right, the lever 30 is separated from the valve body 9 by the action of the torsion coil spring 32, and the locking of the valve body 9 is released.

Here, when the sprinkler head 4 is operated, the small valve 14 is rotated, the pump 2 is activated by the operation of the limit switch 27, the pressurized water is supplied from the water source 1, the valve body 9 is opened, and the activated sprinkler. Water is continuously sprayed from the head 4 to suppress the fire.

However, when the sprinkler head 4 is not operated in the state where the lever 30 is unlocked, the valve body 9 is maintained in the closed state by the torsion coil spring 28. If the operation signal of the limit switch 27 is not obtained even after a predetermined time has passed, the chamber 35 is filled with water by closing the solenoid valve 41, and the valve body 9 is returned to the locked state again by the lever 30. Is possible.

As another case, when the sprinkler head 4 malfunctions, the small valve 14 rotates to operate the limit switch 27, but the locking of the valve body 9 is still maintained by the lever 30, Since only a flow amount of water is supplied to the secondary side pipe 6, water damage caused by malfunction of the sprinkler head 4 can be reduced.

System diagram of the sprinkler facility in which the running water detection device of Example 1 is installed Sectional drawing of the flowing water detection apparatus of Example 1. Plan view of valve body and valve stem The perspective view explaining the composition of a small valve and a valve stem Sectional drawing of the flowing water detection apparatus of Example 2 System diagram of the sprinkler facility in which the running water detection device of Example 3 is installed Sectional drawing of the flowing water detection apparatus of Example 3 The state in which the valve body holding means in FIG. 7 is released

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Water source 2 Pump 3 Flowing water detection apparatus 4 Sprinkler head 9 Valve body 10,11 Shaft 14 Small valve 24 Vertical groove 25 Cam 27 Limit switch 28, 32 Torsion coil spring 30 Lever 33 Push rod 34 Piston 35 Chamber 41 Solenoid valve 101 Hole 102 Intermediate Room

Claims (5)

The interior is divided into a primary side connected to the water source and a secondary side where the sprinkler head is installed, and a valve body for opening and closing a communication port formed in the partition wall is provided. In the flowing water detection device of the swing check structure that rotates, a small valve that rotates coaxially with the valve body is installed, and a small valve opening detection means that detects the rotation angle of the small valve is provided. Flowing water detection device characterized by.
The water flow detection device according to claim 1, wherein a valve body holding means for holding the valve body in a closed state is installed in the water flow detection device.
3. The flowing water detection device according to claim 2, wherein the valve body holding means is a passage that leads to the outside from a hole formed in the valve seat surface.
A sprinkler facility in which the flowing water detection device according to claim 1 or 2 is installed, wherein the valve element holding means is released by the operation of the small valve opening detection means.
A sprinkler facility in which the flowing water detection device according to claim 1 or 2 is installed, wherein the valve body holding means is released by the operation of a fire sensor installed in the vicinity of the sprinkler head. Facility.

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