JP2004229960A - Wet type water flow detector with emergency cutoff function - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water flow detector completely shutting off the feed to a secondary side pipe when a valve element of the water flow detector is opened at non-fire. <P>SOLUTION: This water flow detector is so formed that the inside of the water flow detector 3 is partitioned into a primary side I and the secondary side II by a partition 8, the partition 8 is provided with a communication port 9, the secondary side II of the communication port 9 is equipped with the valve element 10 freely sliding along the inner wall of a valve box, a control chamber 15 formed of the valve element 10 and the valve box inner wall is communicated with the primary side I and the secondary side II, a solenoid valve 21 closing the conduction is provided between the control chamber 15 and the secondary side II, an orifice 20 having the diameter smaller than the bore of a valve seat of the solenoid valve 21 and a check valve 19 preventing the counterflow to the primary side I are provided between the primary side I and the control chamber 15, and a water flow detection means is provided. When there is no fire signal from a fire detector 5 in operating a sprinkler head 4, the solenoid valve is closed and the valve element 10 is seated on the valve seat to hold the closed state of the solenoid valve 21. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a flowing water detection device installed in a wet sprinkler facility in which fire extinguishing water is filled in a pipe to which a sprinkler head is connected.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, as a sprinkler fire extinguishing system including a closed type sprinkler head, a wet sprinkler system in which fire-extinguishing water is filled in a pipe in which the sprinkler head is installed is generally used. In addition, there are dry-type sprinkler equipment that fills the pipe with gas for the purpose of preventing freezing, and pre-actuated sprinkler equipment that sprays fire-extinguishing water when both the sprinkler head and the fire detector operate.
[0003]
Wet sprinkler equipment (hereinafter referred to as "sprinkler equipment") is more economical in terms of cost than the other two. However, if the sprinkler head receives a shock other than during a fire and releases water, the room will be flooded and water damage will occur.
[0004]
Therefore, in the running water detection device installed in the above sprinkler equipment, the one provided with a shut-off means for closing the flow path of the fire extinguishing water to the pipe in which the sprinkler is installed by operating the water discharge stop switch, so-called secondary pipe. (For example, see Patent Document 1).
[0005]
The above-mentioned flowing water detection device is an automatic opening / closing valve having a lift valve structure in which a valve element slides up and down along an inner wall of a valve box, a primary side is connected to a water source, and a secondary side is connected to a sprinkler head. I have.
[0006]
A limit switch provided at the tip of an elevating shaft protruding from the valve body to the outside of the valve box detects vertical movement due to opening and closing of the valve body and monitors the open / closed state of the valve body. The space formed by the upper part of the valve body and the inner wall of the valve box, the primary side and the secondary side are connected by a pipe, and a normally open solenoid valve is provided between the space and the secondary side of the pipe. Is provided.
[0007]
If the sprinkler head provided on the secondary side malfunctions, press the push button switch to close the solenoid valve and fill the space above the valve body with fire water on the primary side to seat the valve body on the valve seat. And shut off the water supply to the secondary side.
[0008]
In addition, in addition to the above, a motorized valve that is normally open on the piping is installed in series with the running water detection device as a shutoff means, and the start of the shutoff means is triggered by a running water detection signal accompanying the operation of the sprinkler head. There is a sprinkler facility that is activated when there is no fire signal from the detection device (for example, see Patent Document 2).
[0009]
FIG. 7 shows a running water detection device and sprinkler equipment configured based on the above prior art. The configuration of the flowing water detecting device 51 in the figure is substantially the same as that of the flowing water detecting device described in Patent Document 1 described above. The difference from Patent Document 1 is that the closing of the electromagnetic valve 52 is determined by a fire signal from the fire detector 53 and a valve open signal from the limit switch 54.
[0010]
More specifically, the electromagnetic valve 52 is closed when there is no signal from the fire detector 53 when the limit switch 54 outputs the valve open signal. When the sprinkler head 55 operates during a fire, the fire extinguishing water in the secondary pipe II flows out of the sprinkler head 55, so that the pressure in the secondary pipe II is reduced and the valve body 56 of the flowing water detecting device 51 opens.
[0011]
When the valve body 56 of the flowing water detecting device 51 is opened, the limit switch 54 operates, and outputs a valve opening signal to the signal control device 57. At this time, if there is a fire signal from the fire detector 53 connected to the signal control device 57, fire extinguishing water is supplied from the primary pipe I to the secondary pipe II while maintaining the state as it is, and the sprinkler head 55 Spray fire extinguishing water to control and suppress fires.
[0012]
When the sprinkler head 55 malfunctions, when the limit switch 54 operates and outputs a valve opening signal to the signal control device 57, there is no fire signal from the fire detector 53, so the electromagnetic valve 52 is closed. By seating the valve body 56 on the valve seat, the supply of fire-extinguishing water to the secondary pipe II is stopped, thereby preventing damage to water damage.
[0013]
[Patent Document 1]
Japanese Patent Publication No. 35-16346 (page 1-2, FIG. 1)
[Patent Document 2]
Japanese Patent Application Laid-Open No. 10-5365 (Pages 3-7, FIGS. 1, 5)
[0014]
[Problems to be solved by the invention]
However, when the fire extinguishing water in the secondary pipe II flows out due to malfunction of the sprinkler head 55 and the fire extinguishing water in the secondary pipe II is depressurized and the valve body is opened, the fire detector 53 Is not output, the solenoid valve 52 is closed. However, when the solenoid valve 52 is closed, the valve body 56 moves in the direction of sitting on the valve seat, and the valve open signal of the limit switch 54 disappears.
[0015]
When the valve opening signal of the limit switch 54 is lost, the solenoid valve 52 returns to the open state, the valve body 56 is opened again, and the opening and closing operation of the valve body 56 is repeated, thereby extinguishing fire to the secondary pipe II. The water supply could not be completely shut off.
[0016]
In view of the above problems, an object of the present invention is to provide a flowing water detection device that can completely shut off the supply of water to the secondary pipe when the valve of the flowing water detection device is opened during a non-fire situation.
[0017]
[Means for Solving the Problems]
In order to achieve the above object, the invention according to claim 1 is an on-off valve provided in a fire extinguishing system, wherein a primary chamber connected to a water supply side and a secondary chamber connected to a sprinkler head side are partitioned. A communication port is provided in the partition, and a slidable valve element is mounted on the secondary side of the communication port along the inner wall of the valve box, and is formed by the valve element and the valve box inner wall. The control room is communicated with the primary side and the secondary side, an electromagnetic valve that closes when energized between the control room and the secondary side is provided, between the primary side and the control room, A sprinkler according to a sprinkler having an orifice having a diameter smaller than a valve seat diameter of a solenoid valve and a check valve for preventing a backflow to a primary side and having a running water detecting means capable of detecting a phenomenon caused by operation of a sprinkler head. When the head operates, the sprinkle -When there is no fire signal from a fire detector provided near the head, the solenoid valve is closed, the valve body can be seated on a valve seat, and the closed state of the solenoid valve is maintained. It is a running water detection device.
[0018]
The invention according to claim 2 is an on-off valve provided in the fire extinguishing equipment, wherein the primary side chamber connected to the water supply side and the secondary side chamber connected to the sprinkler head side are partitioned by a partition wall. A communication port is provided, and a slidable valve element is mounted on the secondary side of the communication port along the inner wall of the valve box, and a control chamber formed by the valve element and the valve box inner wall has a primary side and A solenoid valve that communicates with the secondary side and is closed when energized between the control chamber and the secondary side is provided, and a smaller diameter than the valve seat diameter of the solenoid valve is provided between the primary side and the control chamber. An orifice and a check valve that prevents backflow to the primary side are provided, and in a flowing water detecting device having flowing water detecting means capable of detecting a phenomenon caused by the operation of the sprinkler head, when the sprinkler head is operated, Provided near When there is no fire signal from the fire detector, the solenoid valve is closed and the valve body can be seated on the valve seat.When the detection signal from the flowing water detecting means disappears when the solenoid valve is closed, the solenoid valve is closed after a predetermined time. Is a running water detection device that is opened.
[0019]
According to a third aspect of the present invention, in the running water detecting device having the above-described configuration, the running water detecting means includes a shaft protruding from the valve body to the outside of the valve box, and a limit switch provided at a tip of the shaft. The opening and closing of the valve body can be detected, and when a valve open signal is output by the operation of the limit switch, if there is no fire signal from a fire detector provided near the sprinkler head, the solenoid valve is closed and the valve is closed. 3. The flowing water detecting device according to claim 1, wherein the body can be seated on a valve seat.
[0020]
The invention according to claim 4 is the running water detection device according to any one of claims 1, 2, and 3, wherein the closed state of the solenoid valve is released by a fire signal of a fire detector.
[0021]
The invention according to claim 5 is the flowing water detecting device according to claim 3, wherein the flowing water detecting device is provided with a valve seat surface having a vertical portion that comes into contact with the peripheral surface of the valve element.
[0022]
The invention according to claim 6 is the running water detection device according to claim 2, wherein an off-delay timer is provided in the solenoid valve.
[0023]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a system diagram of a sprinkler facility provided with a flowing water detection device according to a first embodiment of the present invention. FIG. 2 is a sectional view of the flowing water detecting device according to the first embodiment, and FIG. 3 is an operation flow of the flowing water detecting device according to the first embodiment of the present invention.
[0024]
The flowing water detecting device according to the first embodiment of the present invention is a flowing water detecting device configured to maintain a closed state when the electromagnetic valve is closed.
[0025]
The sprinkler equipment provided with the flowing water detecting device of the first embodiment includes a water source 1, a water supply device 2, a flowing water detecting device 3, a sprinkler head 4, a fire detector 5, and a signal control device 6, as shown in FIG. You.
[0026]
The water source 1 is a water tank for storing fire extinguishing water, and the water supply device 2 is a device for pumping fire extinguishing water from the water source 1 to the pipe 7 and supplying it to the sprinkler head 4 connected to the pipe 7. At the time of warning, the pipe 7 is filled with fire extinguishing water up to the end sprinkler head 4. In addition, it is also possible to use domestic water supply equipment instead of the water source 1 and the water supply device 2.
[0027]
As shown in FIG. 2, the flowing water detecting device 3 has an interior of the valve box which is partitioned by a partition 8 into a primary chamber I and a secondary chamber II, and the partition 8 communicates with the primary chamber I and the secondary chamber II. 9 are drilled.
[0028]
A bottomed cylindrical valve body 10 is mounted on the valve seat with the secondary chamber II side of the communication port 9 as a valve seat. The upper portion of the valve body 10 has a flange shape, the side surface of the flange is slidable along the inner wall of the valve box, a horizontal groove is engraved on the side surface of the flange, and a ring-shaped watertight member is formed in the horizontal groove. 11 are provided.
[0029]
A limit switch 13 is provided near the tip of a shaft 12 provided to protrude from the valve body 10 to the outside of the valve box. The limit switch 13 can detect vertical movement caused by opening and closing of the valve body 10.
[0030]
More specifically, the limit switch 13 has a b-contact that is turned on when an object is separated from the actuator, and the actuator is always in contact with the plate P urged by the resilient body.
[0031]
When the valve body 10 is opened, the shaft 12 also moves upward, and the plate P in contact with the actuator is pushed by the shaft 12 and moves away from the actuator, so that the limit switch 13 is turned on, and a valve opening signal is sent to the signal control device 6. Send.
[0032]
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 space is defined as a control room 15. A resilient body 16 is provided between the valve body 10 and the lid 14, and urges the valve body 10 toward the valve seat.
[0033]
The control room 15 has a connection port 17 leading to the outside, and a pipe 18 leading to the primary chamber I and the secondary chamber II is connected to the connection port 17. A check valve 19 through which water can flow from the primary chamber I side to the control chamber 15 and an orifice 20 are installed in an area 18A between the primary chamber I and the control chamber 15 of the pipe 18, and An electromagnetic valve 21 which is always open and closes when energized is provided in the space 18B up to the secondary chamber II.
[0034]
The diameter of the orifice 20 is smaller than the valve seat diameter of the solenoid valve 21.
[0035]
The solenoid valve 21 is connected to the signal control device 6 and can be opened and closed by a signal from the signal control device 6. It is preferable that the solenoid valve 21 has a simple mechanism and a highly reliable direct acting type. In addition, a valve having a structure in which the internal valve body is closed when power is supplied is used.
[0036]
The valve body of the solenoid valve 21 is always open due to the structure in which the valve body is closed at the time of energization. There will be no hindrance to fire fighting activities by the sprinkler equipment installed.
[0037]
The sprinkler head 4 has a heat-sensitive operating mechanism that supports the valve body inside, and the heat-sensitive operating mechanism is operated by the heat of fire to open the valve body, and the inside of the pipe connected to the secondary side II The fire water is sprayed.
[0038]
The fire detector 5 detects a fire based on the heat or smoke of the fire, and outputs a fire signal. Preferably, the fire detector 5 is of a type that operates faster than the sprinkler head 4.
[0039]
The signal control device 6 receives the valve opening signal of the flowing water detection device 3 and the fire signal of the fire detector 5, and outputs a start signal of the water supply device 2 according to each signal state, or is provided in the flowing water detection device 3. The opening and closing of the solenoid valve 21 is controlled.
[0040]
Next, the operation of the sprinkler equipment provided with the above-mentioned flowing water detecting device will be described with reference to FIG.
[0041]
When a fire occurs, the fire detector 5 operates and outputs a fire signal to the signal control device 6. When the sprinkler head 4 operates following the operation of the fire detector 5, fire extinguishing water in the pipe connected to the secondary side chamber II blows out from the sprinkler head 4.
[0042]
The pressure in the pipe connected to the secondary chamber II is reduced by the operation of the sprinkler head 4, and the supply amount of the fire extinguishing water from the primary chamber I to the control chamber 15 is restricted by the orifice 20. The force applied to the valve element 10 is such that the pressure applied from the primary chamber I exceeds the pressure in the control chamber 15 and the valve element 10 slightly moves in the opening direction, and opens to the extent that the flow rate corresponding to the operation of the sprinkler head flows. Fire extinguishing water flows into the secondary side room II.
[0043]
When the valve body 10 is opened, the shaft 12 also moves upward, pushes up the plate P, turns on the limit switch 13, and outputs a valve opening signal to the signal control device 6.
[0044]
When receiving the valve opening signal from the limit switch 13, the signal control device 6 activates the water supply device 2 and pumps out fire extinguishing water from the water source 1 if the fire signal from the fire detector 5 is output, Fire extinguishing water is supplied to a sprinkler head 4 provided in a pipe connected to the secondary side chamber II.
[0045]
When the water supply device 2 is started, pressurized fire extinguishing water is sent from the pipe 7 through the primary side chamber I, and the valve body 10 moves to the fully open position. The fire extinguishing water is sprayed from the sprinkler head 4 to suppress and extinguish the fire.
[0046]
Subsequently, a case where the sprinkler head 4 malfunctions other than during a fire will be described.
[0047]
When the sprinkler head 4 operates, the valve body 10 of the flowing water detecting device 3 opens to the extent that the flow amount corresponding to the operation of the sprinkler head flows, as described above, and the limit switch 13 outputs a valve opening signal to the signal control device 6.
[0048]
At that time, since the fire signal is not input from the fire detector 5 to the signal control device 6, the signal control device 6 closes the solenoid valve 21, maintains the state, and sends the fire extinguishing water of the primary room I to the control room 15. Inflow.
[0049]
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 the flow of water from the primary chamber I to the secondary chamber II, and is caused by malfunction of the sprinkler head 4. It is intended to reduce flood damage.
[0050]
It is also possible to output a water cutoff alarm when the electromagnetic valve 21 is closed, so that the manager or the like is notified of the state in which the electromagnetic valve 21 is kept closed and prompts the recovery of the flowing water detection device.
[0051]
When the fire detector 5 is operated with the solenoid valve 21 closed, the power supply to the solenoid valve 21 is immediately stopped and the solenoid valve 21 is opened to open the valve body 10 and the sprinkler head 4. Can be supplied with fire extinguishing water.
[0052]
The function of maintaining the closed state of the electromagnetic valve 21 may be incorporated in the signal control device 6, or in the sprinkler equipment shown in FIG. 4, the signal control circuit 30 of the flowing water detection device 3 is provided with a self-holding circuit. It is also possible.
[0053]
Next, a flowing water detection device according to a second embodiment will be described with reference to FIGS. FIG. 5 is a cross-sectional view of the running water detection device according to the second embodiment at the time of caution, and FIG. 6 is an operation flow of the running water detection device of the second embodiment.
[0054]
The flowing water detecting device according to the second embodiment is a flowing water detecting device configured to open the electromagnetic valve after a predetermined time elapses when returning the electromagnetic valve from the closed state to the open state.
[0055]
Since the flowing water detecting device and the sprinkler equipment of the second embodiment are substantially the same as those described in the first embodiment, the same components are denoted by the same reference numerals and description thereof is omitted.
[0056]
In the first embodiment, the slight opening amount of the valve body is detected by using the limit switch of the b contact. However, in the second embodiment, the contact portion between the valve body 10 and the valve seat is provided as shown in FIG. A vertical portion 40 is provided, and an O-ring is installed on the valve body 10 as a watertight member 41 of the vertical portion 40 so that the valve body 10 and the valve seat are fitted when the valve is closed.
[0057]
With the above configuration, even when a small flow rate flows, for example, when only one sprinkler head 4 is operated, the distance that the valve element 10 moves in the vertical direction increases, so that the actuator of the limit switch 13 and the shaft 12 The distance between them can be secured sufficiently.
[0058]
Therefore, the distance of the space from the plate P in contact with the actuator of the limit switch 13 to the tip of the shaft 12 is made shorter than the length of the vertical portion 40, so that the valve body 10 is not separated from the valve seat, that is, the primary The limit switch 13 is operated when the fire extinguishing water does not flow from the side chamber I to the secondary side chamber II, and a valve opening signal is output.
[0059]
Next, the operation of the sprinkler equipment provided with the flowing water detection device of the second embodiment will be described with reference to FIG.
[0060]
When a fire occurs, the fire detector 5 operates and outputs a fire signal to the signal control device 6. When the sprinkler head 4 operates following the operation of the fire detector 5, fire extinguishing water in the pipe connected to the secondary side chamber II blows out from the sprinkler head 4.
[0061]
The pressure in the pipe connected to the secondary chamber II is reduced by the operation of the sprinkler head 4, and the supply amount of the fire extinguishing water from the primary chamber I to the control chamber 15 is restricted by the orifice 20. As for the force applied to the valve element 10, the pressure applied from the primary side chamber I exceeds the pressure in the control chamber 15, and the valve element 10 moves slightly in the opening direction.
[0062]
As the valve body 10 moves in the opening direction, the shaft 12 also moves upward, pushing up the plate P to turn on the limit switch 13, and outputs a valve opening signal to the signal control device 6.
[0063]
When receiving the valve opening signal from the limit switch 13, the signal control device 6 activates the water supply device 2 and pumps out fire extinguishing water from the water source 1 if the fire signal from the fire detector 5 is output, Fire extinguishing water is supplied to a sprinkler head 4 provided in a pipe connected to the secondary side chamber II.
[0064]
When the water supply device 2 is started, pressurized fire extinguishing water is sent from the pipe 7 through the primary side chamber I, and the valve body 10 moves to the fully open position. The fire extinguishing water is sprayed from the sprinkler head 4 to suppress and extinguish the fire.
[0065]
Next, a case where the sprinkler head 4 malfunctions other than during a fire will be described.
[0066]
When the sprinkler head 4 is operated, the fire extinguishing water in the secondary side chamber II of the flowing water detecting device 3 is depressurized, the valve body 10 slides toward the control room 15 and a valve opening signal is sent from the limit switch 13 to the signal control device 6. Is output.
[0067]
At this time, the fire extinguishing water does not flow from the primary chamber I to the secondary chamber II because the valve element 10 is not separated from the valve seat. At the same time, since the fire signal is not input from the fire detector 5 to the signal control device 6, the signal control device 6 energizes the solenoid valve 21 to close the valve body, and sends the fire extinguishing water of the primary side room I to the control room 15. Let it flow in.
[0068]
When the fire extinguishing water flows into the control chamber 15, the valve body 10 moves in the direction of the primary chamber I in which the valve seat is provided. When the valve element 10 moves to the valve seat side to a certain position, the shaft 12 separates from the plate P and the valve opening signal disappears.
[0069]
At this time, the off-delay timer provided in the signal control device 6 of FIG. 1 or the signal control circuit 30 of the flowing water detection device 3 of FIG. The energization of the solenoid valve 21 is stopped, and the solenoid valve 21 is opened.
[0070]
Since the solenoid valve 21 is in the closed state until a predetermined time has elapsed, the bottom surface of the valve body 10 is seated on the valve seat, and the communication port 9 is completely shut off.
[0071]
After the predetermined time has elapsed and the solenoid valve 21 has been opened, the fire extinguishing water in the secondary pipe has been flowing to the outside from the malfunctioning sprinkler head 4, so that the valve body 10 is again moved to the control chamber 15. The limit switch 13 is operated by sliding to the side, and the electromagnetic valve 21 is closed.
[0072]
The opening and closing of the solenoid valve 21 is repeated as described above, but the fire extinguishing water flows from the primary chamber I to the secondary chamber II because the limit switch 13 is operated before the valve body 10 reaches the position where the communication port 9 is opened. Nothing to do.
[0073]
Also, if a pressure reducing switch is provided in the pipe connected to the secondary side chamber II of the flowing water detecting device 3, the pressure drop in the pipe due to the malfunction of the sprinkler head 4 is detected, and the sprinkler head malfunctions to the manager or the like. Can be notified.
[0074]
By opening the solenoid valve 21 after a lapse of a predetermined time from the disappearance of the valve opening signal, the fire extinguishing water in the pipe is vibrated due to activation of a pump due to operation of an automatic opening / closing valve on another floor or the like. When the valve body 10 momentarily moves to the control chamber 15 side, the limit switch 13 operates and the solenoid valve 21 is closed, but the solenoid valve 21 is opened after a lapse of a predetermined time, so that the solenoid valve 21 is opened as in the first embodiment. The trouble of restoring after the valve 21 is closed can be saved.
[0075]
Instead of the valve opening signal described as the flowing water detecting means for detecting the phenomenon caused by the operation of the sprinkler head 4 in the first and second embodiments, for example, a sprinkler head described in Japanese Patent Application Laid-Open No. 2-209164 is used. Or a pressure reduction signal from a pressure reduction switch provided in a pipe to which the sprinkler head is connected.
[0076]
Also, instead of the shaft 12 and the limit switch 13 of the flowing water detecting device described in the first and second embodiments, a hole is formed in the valve seat surface to communicate with the outside, and a pressure switch is connected to the hole, and the valve body is connected. By opening 10, it is also possible to detect the pressure of the water flowing into the hole and generate a valve opening signal.
[0077]
Alternatively, it is also possible to use a signal from a flowing water detecting device provided separately from the flowing water detecting device of the present invention.
[0078]
【The invention's effect】
As described above, according to the present invention, by maintaining the closed state of the solenoid valve provided in the flowing water detection device having the above configuration, it is possible to completely shut off the water supply to the sprinkler head when the sprinkler head malfunctions. It is possible to reduce flood damage.
[0079]
Alternatively, when the closed state of the solenoid valve is returned to the open state, by returning to the open state after a predetermined time delay, when the sprinkler head malfunctions, the water supply to the sprinkler head can be completely shut off, and furthermore, the vibration of the water in the piping For example, when the valve element of the flowing water detecting device is opened momentarily, the closed electromagnetic valve is opened after a predetermined time, so that the flowing water detecting device is automatically returned.
[Brief description of the drawings]
FIG. 1 is a system diagram of a sprinkler facility provided with a flowing water detecting device of a first embodiment; FIG. 2 is a cross-sectional view of the flowing water detecting device during an alert of the first embodiment; FIG. 3 is a flowing water detection of the first embodiment; FIG. 4 is another embodiment of the sprinkler equipment provided with the flowing water detecting device of the present invention. FIG. 5 is a cross-sectional view of the flowing water detecting device at the time of warning according to the second embodiment. FIG. Operation flow of running water detection device in form [Fig. 7] System diagram of conventional running water detection device and sprinkler equipment [Explanation of reference numerals]
3 Flowing Water Detector 4 Sprinkler Head 5 Fire Detector 10 Valve 12 Shaft 13 Limit Switch 15 Control Room 21 Solenoid Valve 30 Signal Control Circuit of Flowing Water Detector 40 Vertical Section of Valve Seat 41 Watertight Member

Claims (6)

An on-off valve provided in a fire extinguishing system, in which a primary chamber connected to a water supply side and a secondary chamber connected to a sprinkler head side are separated by a partition wall, and a communication port is provided in the partition wall. A slidable valve element is placed on the secondary side of the communication port along the inner wall of the valve box,
A 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 an electromagnetic valve that closes when energized is provided between the control chamber and the secondary side,
Between the primary side and the control chamber, an orifice having a smaller diameter than the valve seat diameter of the solenoid valve and a check valve for preventing backflow to the primary side are provided.
In a flowing water detecting device having flowing water detecting means capable of detecting a phenomenon caused by operation of a sprinkler head,
If there is no fire signal from a fire detector provided near the sprinkler head during operation of the sprinkler head, the solenoid valve is closed and the valve body can be seated on a valve seat, and the closed state of the solenoid valve is maintained. A running water detection device characterized by being performed. An on-off valve provided in a fire extinguishing system, in which a primary chamber connected to a water supply side and a secondary chamber connected to a sprinkler head side are separated by a partition wall, and a communication port is provided in the partition wall. A slidable valve element is placed on the secondary side of the communication port along the inner wall of the valve box,
A 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 an electromagnetic valve that closes when energized is provided between the control chamber and the secondary side,
Between the primary side and the control chamber, an orifice having a smaller diameter than the valve seat diameter of the solenoid valve and a check valve for preventing backflow to the primary side are provided.
In a flowing water detecting device having flowing water detecting means capable of detecting a phenomenon caused by operation of a sprinkler head,
During operation of the sprinkler head, if there is no fire signal from a fire detector provided near the sprinkler head, the solenoid valve is closed and the valve body can be seated on the valve seat. Wherein the solenoid valve is opened after a lapse of a predetermined time when the detection signal has disappeared. In the flowing water detecting device having the above-described configuration, the valve has a shaft protruding outside the valve box as the flowing water detecting means, and the opening and closing of the valve can be detected by a limit switch provided at the tip of the shaft. When the limit switch is actuated and a valve open signal is output, if there is no fire signal from a fire detector provided near the sprinkler head, the solenoid valve is closed and the valve body can be seated on the valve seat. The flowing water detecting device according to claim 1 or 2, wherein 4. The running water detecting device according to claim 1, wherein the closed state of the solenoid valve is released by a fire signal of a fire detector. The flowing water detecting device according to claim 3, wherein the flowing water detecting device is provided with a valve seat surface having a vertical portion that contacts a peripheral surface of the valve body. The running water detection device according to claim 2, wherein an off-delay timer is provided in the solenoid valve.

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