JP2005040451A - Flowing water detector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flowing water detector capable of detecting the displacement of the rod fixed to a valve disc by a limit switch and also enabling the detection of the displacement of the rod by a general-purpose limit switch not too high in precision even if the opening quantity of the valve disc is extremely small. <P>SOLUTION: In the flowing water detector constituted so that the rod 12 is provided to the valve disc 10 in a state protruded outside of a valve box and the limit switch 13 is installed in the vicinity of the leading end of the rod 12 to detect the movement of the rod 12 caused by the opening and closing of the valve disc 10 with the limit switch 3, the rod 12 is provided so as to brought into contact with the plate P supported outside of the valve box and the plate P is energized in the contact direction with the rod 12 while the limit switch 13 is provided to the end on the side opposite to the support part of the plate P and the displacement quantity of the plate P due to the movement of the rod 12 is amplified by the contact part with the limit switch 13. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

The present invention relates to a water flow detector for sprinkler equipment installed in a building.

The flowing water detection device of the sprinkler facility has a check valve structure, the primary side is connected to the water supply device, and the secondary side is connected to the sprinkler head. In the alert state, the primary side is filled with pressurized water and the secondary side is filled with pressurized fluid, and the primary side pressure and the secondary side pressure are substantially equal, and the valve body is closed.

When the sprinkler head is activated in the event of a fire and the secondary fluid is discharged from the sprinkler head, the pressure in the secondary piping will drop, and if the primary pressure exceeds the secondary pressure, the valve will open. Water flows from the primary side to the secondary side. A running water detection signal is generated by detecting the opening of the valve body.

The flowing water detection device A shown in FIG. 6 is an automatic opening / closing valve having a lift valve structure in which the valve body V slides up and down along the inner wall of the valve box, the primary side I is connected to the water source, and the secondary side II is connected to the sprinkler head Sh. The limit switch Sm provided at the tip of the lift shaft V1 projecting from the valve body V to the outside of the valve box detects the vertical movement caused by the opening and closing of the valve body V to monitor the open / closed state of the valve body. (For example, refer to Patent Document 1).
Japanese Patent Publication No. 35-16346 (page 1-2, Fig. 1)

When the sprinkler head is operated due to a fire, the above-mentioned water flow detection device opens the valve body by the amount of water discharged from the nozzle of the sprinkler head, and water flows from the primary side to the secondary side. The amount of opening of the valve body at that time, that is, the amount of displacement of the rod is slight, and it is necessary to finely adjust the position of the limit switch and rod in order to detect the opening of the valve body by the limit switch, or It was necessary to provide an expensive limit switch with high accuracy.

In particular, the larger the diameter of the flowing water detection device, the smaller the opening amount of the valve body, making it difficult to detect the opening of the valve body with a limit switch.

Therefore, in the present invention, in the flowing water detection device that detects the displacement of the rod fixed to the valve body by the limit switch, even if the opening amount of the valve body is very small, a general-purpose limit switch that is not so high in accuracy is used. The purpose is to provide a running water detector that can detect displacement.

In order to achieve the above object, the invention according to claim 1 is characterized in that the inside of the valve box is partitioned by a partition wall into a primary side chamber connected to the water supply side and a secondary side chamber connected to the sprinkler head side. It has a check valve structure that has a communication port in the partition wall and a valve body that can be opened and closed on the secondary side, and the valve body has a rod that protrudes outside the valve box. A limit switch is installed near the tip of the rod, and the limit switch actuator is in contact with the plate that is pivotally supported outside the valve box. In this state, the plate is urged to the rod side, and the water flow detecting device is provided with a limit switch at the end opposite to the shaft support portion of the plate.

According to a second aspect of the present invention, there is provided a shut-off means for shutting off water supply to the sprinkler head by forcibly fixing the valve body in a closed position using water pressure in equipment piping in the flowing water detection device. The limit switch actuator is in contact with a plate pivotally supported outside the valve box, the plate is urged to the rod side, and a limit switch is provided at the end opposite to the pivotal portion of the plate. It is a flowing water detection apparatus of Claim 1.

According to a third aspect of the present invention, in the flowing water detection device, the control chamber formed by the valve body and the inner wall of the valve box communicates with the primary side and the secondary side, and energization is performed between the control chamber and the secondary side. An energized shut-off valve is provided that closes only when the valve is closed.An orifice that is smaller in diameter than the valve seat diameter of the energized shut-off valve and a check valve that prevents backflow to the primary side are provided between the primary side and the control chamber. A plate that is pivotally supported outside the valve box in a flowing water detection device that is provided and has a structure in which a fluid from the primary side is sealed in the control chamber by closing the energization shut-off valve, and the valve body is seated on the valve seat and closed. 3. The flowing water detection device according to claim 2, wherein the actuator of the limit switch is in contact with the plate, the plate is urged to the rod side, and a limit switch is provided at an end opposite to the shaft support portion of the plate.

According to a fourth aspect of the present invention, in the flowing water detection device, when there is no fire signal from a fire detector provided in the vicinity of the sprinkler head when the sprinkler head is operated, the shut-off means of the flowing water detection device is activated and the valve In the flowing water detection device where the body can be seated on the valve seat, the limit switch actuator is in contact with the plate pivotally supported outside the valve box, the plate is urged to the rod side, 4. The sprinkler facility according to claim 2 or 3, wherein a limit switch is provided at the opposite end.

The invention according to claim 5 is the flowing water detection device according to any one of claims 1 to 4, wherein the limit switch installed in the flowing water detection device is of a b-contact specification and is in contact with the plate during normal times. .

By contacting the rod that is fixed to the valve body and projecting outside the valve box as described above in a state where the pivoted plate is biased, and a limit switch is provided at the end opposite to the pivotal support portion of the plate. When the rod pushes up the plate by opening the valve body and the plate rotates, the limit switch contact portion of the plate is the end opposite to the shaft support portion, so the displacement amount is amplified compared to the displacement amount of the rod. Even a general-purpose limit switch can be detected by opening and closing the valve body.

Install limit switches with b contact specifications. If a set screw is installed as a position adjusting means at the contact portion between the plate and the limit switch, the operation level of the limit switch can be easily adjusted.

Embodiments 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 present invention is installed, FIG. 2 is a cross-sectional view of the water flow detection device of FIG. 1, and FIG. 3 is a cross section of the water flow detection device immediately after the sprinkler head of FIG. FIG. 4 and FIG. 4 are cross-sectional views when the valve body of the flowing water detection device is fully opened.

As shown in FIG. 1, the sprinkler facility provided with the flowing water detection device of the present invention includes a water source 1, a water supply device 2, a flowing water detection device 3, a sprinkler head 4, and an elevated water tank W.

The water source 1 is a water tank for storing fire-extinguishing water, and the water supply device 2 is a device for pumping the fire-extinguishing water from the water source 1 to the pipe 7 and supplying it to the sprinkler head 4 connected to the end of the pipe 7. At the time of warning, the pipe 7 is filled with fire extinguishing water up to the sprinkler head 4 at the end. In addition, it is also possible to use household water supply equipment instead of the water source 1 and the water supply device 2.

As shown in FIG. 2, the flowing water detection device 3 includes a valve portion and a signal control device 6, and the inside of the valve box of the valve is partitioned into a primary side chamber I and a secondary side chamber II by a partition wall 8. A communication port 9 for communicating the primary side chamber I and the secondary side chamber II is formed.

With the secondary side chamber II side of the communication port 9 as a valve seat, a bottomed cylindrical valve body 10 is placed on the valve seat. The upper part of the valve body 10 has a flange shape, the flange side surface is slidable along the inner wall of the valve box, a horizontal groove is formed on the flange side surface, and a ring-shaped watertight member is formed in the horizontal groove. 11 is provided.

A limit switch 13 is provided in the vicinity of the tip of the rod 12 provided so as to protrude from the valve body 10 to the outside of the valve box, and the vertical movement due to opening and closing of the valve body 10 can be detected by the limit switch 13.

Specifically, the limit switch 13 uses a b contact that is turned on when an object is moved away from the actuator, and a plate P urged toward the rod 12 by the projectile S is always in contact with the actuator. Is in a state.

The plate P is pivotally supported outside the valve box and is rotatable, and an adjustment screw T is provided at the end opposite to the pivotal support portion of the plate P. The actuator of the limit switch 13 and the plate P are in contact with each other via an adjusting screw T, and fine position adjustment is possible.

When the valve body 10 is opened, the rod 12 is also moved upward, the plate P is pushed by the rod 12 and pivoted about the shaft, and the tip of the adjustment screw T of the plate P is separated from the actuator of the limit switch 13 so that the limit is reached. The switch 13 is turned on and a signal is transmitted to the signal control device 6.

A space is formed in the upper part of the valve body 10 by the inner wall of the valve box and the lid 14, and this is referred to as a control chamber 15. An elastic body 16 is provided between the valve body 10 and the lid 14 to urge the valve body 10 toward the valve seat.

The control chamber 15 has a connection port 17 that leads to the outside, and a pipe 18 that leads to the primary side chamber I and the secondary side chamber II is connected to the connection port 17. A check valve 19 capable of passing water from the primary side chamber I side to the control chamber 15 and an orifice 20 are installed in a space 18 </ b> A from the primary side chamber I to the control chamber 15. An energization shut-off valve 21 that is always open and closes when energized is provided in 18B until the next chamber II.

The diameter of the orifice 20 is set to be smaller than the valve seat diameter of the energization shut-off valve 21.

The energization shut-off valve 21 is electrically connected to the signal control device 6 and can be controlled to be opened and closed by the signal control device 6. The energization shut-off valve 21 has a structure in which the valve element is open during normal times and the internal valve element is closed only during energization. Specifically, an electromagnetic valve, a spring return ball valve, or the like is used.

The signal control device 6 can transmit signals to various devices such as transmitting a signal generated by the operation of the limit switch 13 of the flowing water detection device 3 to the control panel 30 provided in the management room. A signal is output and the opening / closing of the energization shut-off valve 21 provided in the flowing water detection device 3 is controlled.

When the sprinkler head 4 malfunctions, the energization shut-off valve 21 is closed by a water supply stop switch provided in the signal control device 6, and fire extinguishing water in the primary side chamber I is introduced into the control chamber 15, and the valve body It is possible to stop water discharge from the sprinkler head 4 by seating 10 on the valve seat.

The sprinkler head 4 is provided in a pipe connected to the secondary side chamber II of the flowing water detection device 3. The sprinkler head 4 incorporates a heat-sensitive operating mechanism that supports the valve body. The heat-sensitive operating mechanism is activated by the heat of the fire to open the valve body, and extinguish water in the secondary side II pipe. It is something to spray.

As shown in FIG. 1, the elevated water tank W is disposed on the upper part of the sprinkler facility and connected to the pipe 7 of the sprinkler facility. The elevated water tank W can supply water stored in the water tank to the pipe 7 due to a water pressure difference, and a check valve 23 is provided to prevent a backflow from the pipe 7 side to the elevated water tank W.

Next, the operation of the sprinkler facility in which the running water detection device of the above embodiment is installed will be described.

When a fire occurs, the sprinkler head 4 is actuated by the heat of the fire, and the fire extinguishing water in the pipe connected to the secondary side chamber II of the flowing water detection device 3 is ejected from the sprinkler head 4.

The piping connected to the secondary side chamber II is depressurized by the operation of the sprinkler head 4 and the supply amount of the fire extinguishing water from the primary side chamber I to the control chamber 15 is limited by the orifice 20. The force applied to the valve body 10 is increased so that the pressure applied from the primary side chamber I exceeds the pressure in the control chamber 15 and the valve body 10 moves slightly in the opening direction, so that the flow rate corresponding to the operation of the sprinkler head flows. Fire extinguishing water flows into the secondary side chamber II (see FIG. 3).

When the valve body 10 is opened, the rod 12 is also moved upward to push up the plate P, and the pivotally supported plate P is rotated away from the actuator of the limit switch 13 so that the switch is turned on. 6 outputs a signal.

The water supply device 2 is activated by the output signal from the signal control device 6, and pressurized fire extinguishing water is sent from the pipe 7 through the primary side chamber I, so that the valve body 10 moves to the fully open position (FIG. 4). reference). The fire extinguishing water sent is sprayed from the sprinkler head 4 to suppress and extinguish the fire.

As another embodiment, as shown in FIG. 5, when the fire detector is installed in the sprinkler equipment of the first embodiment and the fire detector 5 is not activated when the sprinkler head is activated, the sprinkler head 4 is It is possible to determine that a malfunction has occurred and automatically shut off the water supply to the sprinkler head 4.

The fire detector 5 is electrically connected to the signal control device 6, the control panel 30, and the like. The fire detector 5 can detect a fire by the heat or smoke of the fire and can output a fire signal to the signal control device 6 or the control panel 30. The fire detector 5 is preferably of a type that operates faster than the operation of the sprinkler head 4.

The operation of the sprinkler facility in which the flowing water detection device is installed will be described. Since the operation at the time of fire is substantially the same as that of the first embodiment, a case where the sprinkler head malfunctions other than at the time of fire will be described.

When the sprinkler head 4 is disassembled and operated due to an impact or the like, the fire extinguishing water in the pipe connected to the secondary side II flows out, and the valve body 10 of the water flow detector 3 is connected to the sprinkler head as described above. The limit switch 13 is turned on so that the flow rate for the operation flows, and the operation signal of the limit switch 13 is output to the signal control device 6.

At that time, since the fire signal is not input to the signal control device 6 from the fire detector 5, the signal control device 6 closes the energization shut-off valve 21 and allows the fire water in the primary side chamber I to flow into the control chamber 15.

When the fire extinguishing water flows into the control chamber 15, the valve body 10 slides downward and is seated on the valve seat, shuts off water flow from the primary side chamber I to the secondary side chamber II, and is caused by malfunction of the sprinkler head 4. It reduces water damage.

System diagram of sprinkler equipment in which the water flow detector of the present invention is installed 1 is a cross-sectional view of the flowing water detection device of FIG. Sectional drawing of the flowing water detection apparatus immediately after the sprinkler head of FIG. 1 act | operates Sectional view when the valve body of the water flow detector is fully open System diagram of sprinkler equipment of another embodiment in which the water flow detection device of the present invention is installed Sectional view of the flowing water detection device described in Patent Document 1

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Water source 2 Water supply apparatus 3 Flowing water detection apparatus 4 Sprinkler head 6 Signal control apparatus 10 Valve body 12 Rod 13 Limit switch P Plate S Elastic body T Adjustment screw

Claims (5)

The inside of the valve box is partitioned by a partition into a primary chamber connected to the water supply side and a secondary chamber connected to the sprinkler head side, and a communication port is drilled in the partition and opens and closes to the secondary side. It has a check valve structure with a flexible valve body, and the valve body is provided with a rod protruding outside the valve box, and a limit switch is installed near the tip of the rod to open and close the valve body. In the flowing water detection device that can detect the movement of the rod by the limit switch,
Check that the limit switch actuator is in contact with the plate that is pivotally supported outside the valve box, the plate is urged to the rod side, and a limit switch is provided on the opposite end of the plate. A featured water detection device.
The flowing water detection device is provided with a blocking means for blocking water supply to the sprinkler head by forcibly fixing the valve body to a closed position using water pressure in equipment piping.
Check that the limit switch actuator is in contact with the plate pivoted outside the valve box, the plate is urged to the rod side, and a limit switch is provided on the opposite end of the plate. The flowing water detection device according to claim 1, characterized in that:
The flowing water detection device has a control chamber formed by a valve body and a valve box inner wall communicating with a primary side and a secondary side, and is an energized shut-off valve that is closed only when energized between the control chamber and the secondary side. An orifice having a diameter smaller than the valve seat diameter of the energized shut-off valve and a check valve that prevents backflow to the primary side are provided between the primary side and the control chamber. In the flowing water detection device, which is a structure in which the fluid from the primary side is sealed in the control chamber by closing and the valve body is seated on the valve seat and closed.
Check that the limit switch actuator is in contact with the plate pivoted outside the valve box, the plate is urged to the rod side, and a limit switch is provided on the opposite end of the plate. The flowing water detection device according to claim 2, wherein:
When the sprinkler head is in operation, the flowing water detection device can activate the shut-off means of the flowing water detection device so that the valve body can be seated on the valve seat if there is no fire signal from a fire detector provided near the sprinkler head. In a running water detector,
Check that the limit switch actuator is in contact with the plate pivoted outside the valve box, the plate is urged to the rod side, and a limit switch is provided on the opposite end of the plate. The sprinkler equipment according to claim 2 or 3, characterized by the above.
5. The water flow detection device according to claim 1, wherein the limit switch installed in the water flow detection device is of a b-contact specification, and is in contact with a plate during normal times.

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