JP2020049035A - Fire hydrant device inspection system and three-way selector valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To remotely and automatically inspect important functions of a fire hydrant device including a fire hydrant valve and a remote control mechanism thereof, reduce power consumption at the time of inspection, and reliably detect an abnormality in the equipment to be inspected. And. At the time of automatic inspection when an inspection instruction signal is received from the outside, fire extinguishing water is supplied to a cylinder chamber 94 of an inspection switching valve 50 by open control of a pilot electric valve 52, and a valve body 82 is moved by a piston 90. From the water discharge switching position where the inflow port 76 and the outflow port 78 are communicated and the inflow port 76 and the drainage port 80 are separated, the inflow port 76 and the outflow port 78 are separated and switched to the drainage switching position where the inflow port 76 and the drainage port 80 are communicated with each other. Subsequently, the fire hydrant valve 46 is opened and driven by the electric actuator 60, the fire extinguishing water is flowed through the inspection switching valve 50 to the drain hose 58, and the drain pressure is measured and determined by the pressure sensor 68. [Selection diagram] FIG. 5

Description

  The present invention relates to a fire hydrant device inspection system and a three-way switching valve for inspecting a fire hydrant device installed in a tunnel in which a hose with a nozzle is pulled out to extinguish a fire.

  Conventionally, fire hydrant devices have been provided as tunnel emergency equipment to be installed in tunnels such as expressways and motorways.The fire hydrant device has a fire hydrant door that can be freely opened, and a hose with a nozzle attached to the tip and a fire hydrant valve. Contains valves, including:

  Fire hydrant devices are generally embedded in the tunnel wall at intervals of, for example, 50 meters along the tunnel side wall, and assuming a road user who is passing through at the time of fire as a main operator, a relatively small fire hydrant device is generated in the tunnel. It is installed to extinguish fires of scale and early stage fires.

  Tunnel hydrant equipment is an extremely important equipment as an initial fire extinguishing means in road tunnels, and road managers perform regular inspections and perform maintenance and management.

  However, after the road has been put into service, time constraints and safety issues, such as conducting inspections while vehicles are passing or conducting inspections when road restrictions or road closures are implemented in conjunction with other facilities, etc. There are many issues in maintenance, such as the above regulations.

  Furthermore, in recent years, with the emergence of long urban tunnels, daily inspections may be necessary considering the minimum required time, which is the number of fire hydrant units inspected and the number of units installed. It is becoming more difficult to maintain and improve the quality of the work. In the future, it is certain that society is aging and the birthrate is declining. In addition to the succession of technology, it is also an urgent issue to solve the problem that shortage of personnel makes it impossible to secure inspection personnel.

  As a method for solving such a problem, an inspection system for a tunnel fire hydrant device disclosed in Patent Document 1 has been proposed. In this inspection system, a motorized valve is provided in parallel with the hydrant valve, and a three-way switching motorized valve is provided on the secondary side of the automatic pressure regulating valve device that follows. After switching the switching electric valve from the water supply side to the hose to the drain side, open the electric valve parallel to the fire hydrant valve, let the fire extinguishing water flow to the drain side, perform a water discharge test equivalent to discharging water from the hose with the nozzle, It is checked whether normal water discharge pressure can be obtained by the pressure control valve.

JP 2011-120717 A

  However, in such a conventional fire hydrant device inspection system, a remote control mechanism using a link wire that opens and closes a hydrant valve by a hydrant valve opening / closing lever cannot be inspected, and automatic hydrant valve opening / closing levers cannot be inspected. At present, there are still inspections that rely on the inspector, such as inspections focusing on the set value of the pressure regulating valve. Various demands for ensuring sex have not been fully met.

  The present invention enables remote and automatic inspection of important functions of a fire hydrant device including a fire hydrant valve and its remote operation mechanism, reduces power consumption at the time of inspection, and reliably detects abnormalities of equipment to be inspected. It is an object of the present invention to provide a fire hydrant device inspection system and a three-way switching valve that are enabled.

(Fire hydrant inspection system)
The present invention relates to a fire hydrant device inspection system for inspecting a fire hydrant device that draws out a hose with a nozzle and discharges water.
A pipe connected to the hose is provided following the fire hydrant valve and the automatic pressure regulating valve, and the piston is provided in the cylinder chamber. By moving the valve body, the inlet and outlet are connected, and the inlet and drain are connected. An inspection switching valve that switches to a drainage switching position that disconnects the inlet and outlet, and also switches to a drainage switching position that connects the inlet and drain.
A pilot motor-operated valve provided in a pipe for supplying fire-extinguishing water to a drive mechanism of the inspection switching valve;
An actuator for opening and closing the hydrant valve,
A switching position detector for detecting a water discharge switching position or a drainage switching position of the inspection switching valve,
At the start of inspection, the switching valve for inspection is switched to the drain switching position by opening control of the pilot motorized valve, and when the drain switching position is detected by the switching position detector, the fire hydrant valve is opened by the actuator control to switch for inspection. An inspection control unit for causing fire-fighting water to flow to the drainage side via a valve and for checking;
Is provided.

(Recovery due to inspection completion)
After the inspection is completed, the inspection control unit closes and controls the fire hydrant valve by the actuator to restore the fire hydrant valve. Then, the inspection control unit switches the inspection switching valve to the water discharge switching position and restores it by closing the pilot electric valve.

(Operation monitoring of automatic pressure regulator)
A pressure sensor is provided on the drain side of the check switching valve,
The check control unit determines the set pressure of the automatic pressure regulating valve and the suitability of the pressure regulating function based on the pressure detected by the pressure sensor, and notifies the user of the determined pressure.

(Operation monitoring of inspection switching valve)
The inspection control unit determines whether or not the inspection switching valve has correctly operated based on the position detection by the switching position detector, and notifies the user of the determination.

(Structure of switching valve for inspection)
The switching valve for inspection is
The inside of the valve body is divided into an inflow chamber in which an inflow port is formed by a partition and an outflow chamber in which an outflow port is formed,
A first valve seat is formed on the inflow chamber side of the valve hole formed in the partition, and a discharge port is formed coaxially on the outer shell facing the valve hole, and a first port is formed on the inflow chamber side of the discharge port. A second valve seat is formed opposite the valve seat;
A valve body that is axially moved by a drive mechanism is disposed between the first valve seat and the second valve seat,
The drive mechanism holds the piston housed in the cylinder chamber at a water discharge switching position where the valve body abuts on the second valve seat by a spring. The cylinder chamber is moved to a drain switching position to be brought into contact with the first valve seat, and the cylinder chamber is connected to a drain side via an orifice for regulating a predetermined drain amount.

(Switch position detector)
The switching position detector is
A water discharge switching position detector that detects movement of the valve element to the water discharge switching position by the drive mechanism;
A drain switching position detector that detects movement of the valve element to the drain switching position by the drive mechanism;
Is provided.

(Strain sensor)
The water discharge switching position detector is a first strain sensor that detects the water discharge switching position by receiving pressure from the piston when the valve body is moved to the water discharge switching position by the drive mechanism,
The drainage switching position detector is a second strain sensor that detects the drainage switching position by receiving pressure from the piston when the valve body is moved to the drainage switching position by the drive mechanism.

(Electric actuator)
The actuator is an electric actuator driven by a motor.

(Torque sensor)
The electric actuator includes a torque limiter that operates when the driving torque exceeds a predetermined torque to release the driving force,
When the inspection control unit detects the operation of the torque limiter, the inspection control unit stops driving the motor and outputs a failure alarm.

(Three-way switching valve)
In another embodiment of the present invention, in a three-way switching valve,
The valve body has an inflow port, a first outflow port, and a second outflow port, and the valve body is moved by a drive mechanism in which a piston is provided in the cylinder chamber. A first switching position for disconnecting the inlet from the second outlet and a second switching position for disconnecting the inlet from the first outlet and communicating the inlet with the second outlet.

(Basic effects)
The present invention relates to a fire hydrant inspection system for inspecting the function of a fire hydrant device that draws out a hose with a nozzle and discharges water. In the fire hydrant device inspection system, a water supply pipe to a hose is provided following a fire hydrant valve and an automatic pressure regulating valve, and a cylinder chamber is provided. By the movement of the valve body by the drive mechanism provided with a piston, a water discharge switching position that connects the inlet and the outlet and separates the inlet and the drain, and separates the inlet and the outlet while separating the inlet and the outlet. Inspection switching valve that switches to a communicating drainage switching position, a pilot motor valve provided in a pipe that supplies fire extinguishing water to the drive mechanism of the inspection switching valve, an actuator that opens and closes a fire hydrant valve, and an inspection switching valve The switching position detector that detects the water discharge switching position or drain switching position, and the inspection switching valve is switched to the drain switching position by opening control of the pilot motor-operated valve when the inspection starts, and turned off. An inspection control unit is provided for opening the fire hydrant valve by the control of the actuator when the drainage switching position is detected by the position detector and flowing fire-extinguishing water to the drainage side via the inspection switching valve for inspection. An advanced inspection of important functions of a fire hydrant device including a fire hydrant valve and its remote control mechanism which has not been inspected conventionally can be automatically and continuously performed for a large number of fire hydrant devices installed in a tunnel.

  In addition, the inspection switching valve that switches from the water discharge side to the drainage side during inspection is a hydraulic drive type that can be switched by supplying fire extinguishing water to a drive mechanism by a pilot electric valve, and the pilot electric valve is provided in a small-diameter pilot pipe. It is possible to reduce the power consumption, reduce the size of the cable laid in the tunnel, reduce the capacity of the emergency power supply, etc., and thereby reduce the cost.

  At the time of inspection, in order to prevent erroneous water discharge from the hose, it is necessary to first switch the inspection switching valve to the drain side and then open the fire hydrant valve. Is switched to the drain switching position where the hose side is closed and the drain side is opened, the switching to the drain switching position is detected by the switching position detector, and the fire hydrant valve is opened by driving the actuator. By opening the fire hydrant valve after confirming the switching of the valve to the drain side, erroneous water discharge from the hose can be reliably prevented.

(Effect of restoration due to the end of inspection)
In addition, the inspection control unit, after the inspection is completed, after closing and controlling the fire hydrant valve by the actuator and restoring, since the pilot electric valve is closed and the inspection switching valve is switched to the water discharge switching position and restored, When the inspection is completed, in which the fire water is discharged to the drain through the inspection fire hydrant valve, the fire hydrant valve is first closed by the actuator to stop the fire water flowing to the drain through the inspection switching valve. By switching the inspection switching valve to the water discharge switching position, it is possible to reliably prevent fire extinguishing water from flowing into the hose and staying there.

  In addition, when the valve element is switched from the drain switching position to the water discharging switching position in a state where the supply of fire-fighting water to the inspection switching valve is stopped by closing the fire hydrant valve, the outlet and the discharge port communicate with each other on the way, and the outlet Is open to the atmosphere via a hose, so the fire extinguishing water remaining in the inflow chamber and primary pipe of the switching valve for inspection is discharged from the drain port, and drains surely when the inspection is restored. be able to.

(Effect of monitoring the operation of the automatic pressure regulator)
Also, a pressure sensor is provided on the drain side of the inspection switching valve, and the inspection control unit determines the appropriateness of the set pressure of the automatic pressure regulating valve and the pressure regulating function based on the detected pressure of the pressure sensor and informs the user of the determination. By automatically checking the fire hydrant device, it is possible to readjust the setting of the discharge pressure setting from the pressure of the fire-extinguishing water flowing to the drain through the check switching valve and readjust it. Can respond.

(Effects from monitoring the operation of the switching valve for inspection)
Further, the inspection control unit determines whether or not the inspection switching valve has been correctly operated based on the position detection by the switching position detector and notifies the operator whether the inspection switching valve has been correctly operated. Can be reliably detected and reported.

(Effects due to the structure of the switching valve for inspection)
In the inspection switching valve, the inside of the valve body is divided into an inflow chamber in which an inflow port is formed by a partition and an outflow chamber in which an outflow port is formed. A first valve seat is formed, a discharge port is formed coaxially with the outer shell facing the valve hole, and a second valve seat is formed on the inflow chamber side of the discharge port relative to the first valve seat. A valve body that is moved in the axial direction by a drive mechanism is disposed between the first valve seat and the second valve seat, and the drive mechanism moves the piston housed in the cylinder chamber to a second position by a spring. The piston is moved to a drain switching position in which the piston is brought into contact with the first valve seat by the supply of fire extinguishing water by opening control of the pilot motor operated valve, and the cylinder chamber is further moved. Connected to the drain side via an orifice that regulates the predetermined drain volume The function as a three-way switching valve that switches from the water discharge switching position communicating with the hose side to the drain switching position communicating with the drain side by the linear movement of the valve body driven by the hydraulic pressure of the drive mechanism can be realized, and the conventional Compared to a three-way electric switching valve, since the valve body is brought into contact with the first or second valve seat, there is no water leakage unlike the conventional three-way electric switching valve that rotates the valve body, and the inlet can be reliably flowed through. It can be selectively switched to an outlet or outlet.

  In addition, the switching valve for inspection normally holds the valve body in the water discharge switching position by the force of the spring, communicates with the hose side, and fully closes the drain side, so that the water discharge switching position is independent of power loss. , A high fail-safe function is obtained.

  In addition, the cylinder chamber of the drive mechanism that switches the inspection switching valve is connected to the drainage side through the orifice and is always in a drainage state, and the water discharge switching position is maintained unless fire extinguishing water is supplied by the operation of the pilot electric valve. Even if an inspection switching valve is provided, fire extinguishing water can be reliably supplied to the hose side and discharged by the fire hydrant valve opening / closing operation in the event of a fire.

(Effects of fittings at drain outlets)
In addition, since the drainage hose is connected to the drainage port via a detachable joint, the inspection changeover valve is provided with a drainage hose detachably by, for example, providing a Machino type joint. In the case of inspection, the drainage hose can be detached and an inspection hose provided with a pressure gauge and a test nozzle can be connected to the joint of the drainage port to perform inspection and discharge.

(Effect of switching position detector)
The switching position detector includes a water discharge switching position detector that detects movement of the valve element to the water discharge switching position by the driving mechanism, and a drainage switching position detector that detects movement of the valve element to the drain switching position by the driving mechanism. For example, the water discharge switching position detector is a first strain sensor that detects the water discharge switching position by pressing the piston when the valve mechanism is moved to the water discharge switching position by the drive mechanism, Since the position detector is a second strain sensor that detects the drainage switching position by receiving pressure from the piston when the valve body is moved to the drainage switching position by the drive mechanism, the inspection switching valve normally operates during inspection. It is possible to reliably monitor whether an operation has occurred or an error has occurred and respond accordingly.

  In addition, by providing a strain sensor in the cylinder as a switching position detector, it is possible to detect the force due to the movement of the piston and check the valve operation. Enables downsizing. Further, since the operation of the valve element itself by the piston is detected, reliability in inspection, such as determination of the presence or absence of a failure, is improved.

(Effect of the electric actuator torque limiter)
The actuator that opens and closes the hydrant valve is an electric actuator driven by a motor. The electric actuator includes a torque limiter that operates when the driving torque exceeds a predetermined torque to release the driving force. When the operation of the limiter is detected, the motor drive is stopped and a fault alarm is output, so if excessive torque is applied to the electric actuator that drives the hydrant valve, the torque limiter will operate to prevent abnormal overheating etc. Prevention and detection of the operation of the torque limiter to generate an alarm enable the operator to know the abnormality of the actuator and take appropriate measures.

(Effect of three-way switching valve)
According to another aspect of the present invention, in a three-way switching valve, a valve provided with an inlet, a first outlet, and a second outlet in a valve body and having a piston in a cylinder chamber is provided by a drive mechanism. The movement of the body causes the first inlet to communicate with the inlet and the first outlet, and separates the inlet from the second outlet. The first switching position separates the inlet from the first outlet, and also connects the inlet to the second outlet. The valve body is configured to be switched to a second switching position which communicates with the valve body. More specifically, the inside of the valve body is formed with an inflow chamber formed by a partition and an inflow chamber formed with a first outflow port. A first valve seat is formed on the inflow chamber side of the valve hole formed in the partition, and a second outlet is formed coaxially on the outer shell facing the valve hole, and the second outlet is formed. A second valve seat is formed on the inflow chamber side of the outflow port, opposite to the first valve seat, and the first valve seat and the second valve seat are formed. A valve body that is moved in the axial direction by a drive mechanism is disposed therebetween, and the drive mechanism holds a piston housed in the cylinder chamber at a first switching position where the valve body abuts on a second valve seat by a spring. The piston is moved to the second switching position where the piston is brought into contact with the first valve seat by the supply of fire-extinguishing water to the cylinder chamber. On the other hand, a function as a three-way switching valve for selectively switching the first or second outflow port can be realized, and the switching operation of the three-way switching valve is performed by a small pilot motor valve provided in a small-diameter pilot pipe. Since supply is sufficient, power consumption can be reduced, cable size can be reduced, power supply capacity can be reduced, and the cost can be reduced accordingly.

  In addition, since the valve element is brought into contact with the first or second valve seat as compared with the conventional three-way electric switching valve that rotates the valve element, water leakage like the conventional three-way electric switching valve that rotates the valve element is performed. Therefore, the inlet can be selectively switched to the first outlet or the second outlet without fail.

  Furthermore, the three-way switching valve normally holds the valve body at the first switching position by the force of a spring, communicates with the first outlet side, and fully closes the second outlet side. A high fail-safe function is obtained by maintaining the first switching position irrespective of the loss of power.

The front view of a fire hydrant device. Top view of the fire hydrant device with the fire hydrant door open Side view of the fire hydrant device with the fire hydrant door open Explanatory drawing showing the outline of the fire hydrant inspection system Explanatory drawing showing an embodiment of a device structure constituting a fire hydrant inspection system Explanatory diagram showing the operation when the fire hydrant valve opening / closing lever is opened during a fire Explanatory diagram showing the operation during automatic inspection Flow chart showing automatic inspection control of fire hydrant inspection system Explanatory drawing showing another embodiment of a fire hydrant device inspection system that drives a fire hydrant valve to be opened and closed by a hydraulic actuator

[Overview of fire hydrant system]
1 is a front view of the fire hydrant device, FIG. 2 is a plan view of the fire hydrant device with the fire hydrant door open, and FIG. 3 is a side view of the fire hydrant device with the fire hydrant door open.

  As shown in FIGS. 1 to 3, the fire hydrant device 10 is provided with a fire hydrant door 14 and a maintenance door 15 at a door opening on the front right side of a device main body (housing) 12, and the inside thereof is a hose storage space and It is a space for storing valves.

  The fire hydrant door 14 is a front-opening opening / closing door, and the door handle 16 on the upper side can be pulled out toward the front with the hinge on the lower side of the door as the center, and can be opened to the front lower side. A maintenance door 15 that opens and closes upward around the upper hinge is provided on the fire hydrant door 14, and can be opened by opening the fire hydrant door 14 and then lifting it upward during inspection.

  A notification device door 18 is provided on the right side of a fire extinguisher door 26 provided at a left door opening of the device body 12, and a push button notification device (transmitter) 20 and a red indicator light 22 are provided here. In the push button notification device 20, a push button switch is arranged behind a transparent protection plate, and when the protection plate is pressed in, the push button switch is turned on, a fire notification signal is transmitted to a disaster prevention reception board of the monitoring center and a fire alarm is issued. Output.

  The red indicator light 22 is constantly lit, so that the installation location of the fire hydrant device 10 can be seen from a distance. In the event of a fire, the push-button notification device 20 is pressed and a fire notification signal is transmitted to the disaster prevention receiver of the monitoring center and a fire alarm is issued. In response to this, a response signal is sent from the disaster prevention receiver and the red indicator lamp 22 flashes. You.

  A fire extinguisher door 26 is provided on the left side of the notification device door 18, and two fire extinguishers 28 are housed inside.

  A hose 38 is internally wound and housed in a hose storage space formed behind the fire hydrant door 14 of the apparatus body 12, and a water discharge nozzle 40 is attached to a tip of the hose 38. And is detachably held by a nozzle holder 42 arranged at the bottom.

  A valve storage space disposed on the right side of the hose storage space includes a water supply valve system including a water supply valve 32 and a fire hydrant valve in a piping system from a fire extinguishing piping connection port 30 to which a pipe from a pump facility is connected to a hose connection port. Is provided.

  The fire hydrant valve is provided with a fire hydrant valve opening / closing lever 36 disposed on the back side of the fire hydrant door 14. When the fire hydrant valve opening / closing lever 36 is operated, the fire hydrant valve is opened / closed via a parallel link wire mechanism.

[Overview of fire hydrant inspection system]
FIG. 4 is an explanatory view schematically showing a fire hydrant device inspection system. As shown in FIG. 4, for the fire hydrant device 10, a rising pipe 44 branched from the water supply main pipe 43 is connected to the fire extinguishing pipe connection port 30, and extends from the fire extinguishing pipe connection port 30 to a connection port of the hose 38. The pipe 45 is provided with a water discharge valve system including a water supply valve 32, a fire hydrant valve 46, and an automatic pressure regulating valve 48.

  In addition to this, in the fire hydrant device inspection system of the present embodiment, an inspection switching valve 50 is provided following the automatic pressure regulating valve 48, and a pilot electric valve 52 is provided to drive the inspection switching valve 50 to be opened and closed by water pressure. Can be

  The inspection switching valve 50 includes a drain line connected to the hose 38 and a drain line connected to the drain hose 58 to an inlet on the secondary side of the automatic pressure regulating valve 48 by movement of the valve body by the piston / cylinder mechanism. Selectively switch. The cylinder chamber of the inspection switching valve 50 is connected to the drainage side via an orifice 54 and a check valve 56.

  The hydrant valve 46 is connected to a hydrant valve opening / closing lever 36 installed on the back surface of the hydrant door 14 via a remote control mechanism 62 having a parallel link wire mechanism. Is provided with an electric actuator 60 for opening and closing the fire hydrant valve 46 via a remote control mechanism 62. The electric actuator 60 includes a torque limiter that operates when the driving torque for the fire hydrant valve 46 exceeds a predetermined torque to release the driving force.

  As a sensor for detecting an operation state in the function check of the fire hydrant device 10, a first strain sensor 64 functioning as a water discharge switch position detector in the cylinder chamber of the piston-cylinder mechanism of the check switching valve 50 and a drain switch position detection. A second strain sensor 66 functioning as a vessel is provided, a drainage hose 58 connected to the inspection switching valve 50 is provided with a pressure sensor 68 for detecting drainage pressure, and a remote control mechanism 62 is provided with a fire hydrant valve 46. An open / close detector 70 for detecting opening / closing is provided, and the electric actuator 60 is further provided with a torque limiter operation sensor 61 for detecting the operation of the torque limiter.

  Further, the fire hydrant device 10 is provided with a pump start switch 72 used by the fire brigade, and a manual inspection switch 74 is provided corresponding to the fire hydrant device inspection system of the present embodiment.

  The inspection control unit 75 includes a communication unit that performs wired communication with a control unit using a computer circuit. The communication by the communication unit may be wireless communication. The inspection control unit 75 receives signal lines from the first strain sensor 64, the second strain sensor 66, the pressure sensor 68, the open / close detector 70, and the torque limiter operation sensor 61. A signal line from the manual inspection switch 74 is input, and further, a signal line is output to the pilot electric valve 52 and the electric actuator 60. In addition, a communication line is connected from a communication unit provided in the inspection control unit 75 to a disaster prevention receiver installed in a monitoring room or the like of the tunnel.

  The inspection control unit 75 switches the inspection switching valve 50 to the drain switching position by controlling the opening of the pilot motor-operated valve 52 when the inspection instruction signal is received from the disaster prevention receiving board with the automatic inspection, and the second distortion sensor 66 When the drainage switching position is detected, the electric actuator 60 drives the fire hydrant valve 46 to open and controls the fire extinguishing water to flow to the drainage hose 58 via the inspection switching valve 50 to perform control.

[Equipment structure of fire hydrant inspection system]
FIG. 5 is an explanatory diagram showing an embodiment of a device structure constituting the fire hydrant inspection system.

(Switching valve for inspection)
As shown in FIG. 5, the inspection switching valve 50 is provided in the pipe 45 leading to the hose, following the fire hydrant valve 46 and the automatic pressure regulating valve 48. An inlet 76, an outlet 78, and a drain 80 are formed in the valve body 51 of the inspection switching valve 50, and a pipe from the secondary side of the automatic pressure regulating valve 48 is connected to the inlet 76, and the outlet 78 is connected to the outlet 78. The hose 47 is connected to a pipe 47, and a drain port 80 is provided with, for example, a Machino type joint 106 as a hose joint.

  The inside of the valve body 51 is divided by a partition 83 into an inflow chamber in which an inflow port 76 is formed and an outflow chamber in which an outflow port 78 is formed, and a seat packing is provided on the inflow chamber side of a valve hole 84 formed in the partition wall 83. A first valve seat 85 provided is formed, and a drain port 80 is formed coaxially with the body of the body facing the valve hole 84. Thus, a second valve seat 88 having a seat packing is formed.

  Between the first valve seat 85 and the second valve seat 88, an axially moved valve body 82 connected to a piston rod 92 of a piston 90 of a piston-cylinder mechanism functioning as a driving mechanism is arranged. ing.

  The piston / cylinder mechanism of the inspection switching valve 50 causes the piston 90 slidably housed in the cylinder chamber 94 to abut the valve body 82 against the second valve seat 88 by the spring 96 to close the drain port 80. It is held at the water discharge switching position.

  A pilot pipe 53 branched from the pipe 45 is connected to the cylinder chamber 94, and a pilot electric valve 52 is provided in the pilot pipe 53. The pilot electric valve 52 is closed in a normal state. Since the fire extinguishing water is not supplied, the inspection switching valve 50 holds the illustrated water discharge switching position.

  Here, the size of the pipe 45 provided with the fire hydrant valve 46 and the automatic pressure regulating valve 48 is, for example, 32 to 40 mm in diameter, whereas the size of the pilot pipe 53 is 10 to 15 mm in diameter, and the pipe 45 has a large diameter. The power consumption of the provided motorized valve is several tens of watts, whereas the pilot motorized valve 52 provided in the small-diameter pilot pipe 53 can be a small motorized valve, which reduces power consumption and is laid in a tunnel. The cable size can be reduced, the capacity of the emergency power supply can be reduced, and the cost can be reduced accordingly.

  Further, the cylinder chamber 94 of the inspection switching valve 50 is connected to the drainage side via the orifice 54 and the check valve 56, and the fire extinguishing water is drained from the cylinder chamber 94 in a state where the pilot electric valve 52 is closed. By pressing the piston 90 by the spring 96, the water discharge switching position can be held. In addition, the check valve 56 prevents the fire extinguishing water from flowing back into the cylinder chamber 94 from the drainage side, and enables the inspection switching valve 50 to be reliably held at the water discharge switching position.

  In the inspection switching valve 50 having such a structure, the pilot motor valve 52 is normally closed and the fire extinguishing water is not supplied to the cylinder chamber 94. By contacting the second valve seat 88, the inflow port 76 and the outflow port 78 communicate with each other through the valve hole 84, and the drainage port 80 is closed to be held at the water discharge switching position where it is separated from the inflow port 76.

  In this way, the inspection switching valve 50 normally holds the valve body 82 at the water discharge switching position by the force of the spring 96, connects the inflow port 76 to the hose-side outflow port 78, and fully closes the drain port 80. Therefore, a high fail-safe function can be obtained by maintaining the water discharge switching position regardless of the power loss.

  A first distortion sensor 64 functioning as a water discharge switching position detector is disposed in the cylinder chamber 94 of the inspection switching valve 50, and a second distortion functioning as a drainage switching position detector is provided on the storage side of the spring 96. A sensor 66 is provided.

  Assuming that an axial interval at which the valve element 82 moves between the first valve seat 85 and the second valve seat 88 is X, the first strain sensor 64 detects that the valve element 82 A distortion detection signal corresponding to the distortion due to the pressing force when in the water discharge switching position in which the water outlet 80 is closed by contacting the seat 88 is output as a water discharge switching position detection signal.

  Further, when the piston 90 compresses the spring 96 by the supply of fire-extinguishing water to the cylinder chamber 94 and moves by the interval X, the second strain sensor 66 is pressed, and a strain detection signal corresponding to the strain due to the pressing force at this time. Is output as a drainage switching position detection signal.

  A Machino type joint 106 is provided at a drain port 80 of the inspection switching valve 50, and a drain hose 58 is detachably connected. A pressure sensor 68 with a pressure gauge is provided in the middle of the drainage hose 58 to measure the pressure when the fire extinguishing water is drained to the drainage hose 58 via the switching valve 50 for inspection and the water discharge test is performed. I have. Note that a flow rate sensor may be provided in the drain hose 58 to measure the flow rate when a water discharge test is performed.

(Electric actuator)
The electric actuator 60 is an actuator that drives the opening and closing of the hydrant valve 46 by a motor. Since the valve shaft of the hydrant valve 46 is connected to the pulley 98 of the remote control mechanism 62, the output of the electric actuator 60 is transmitted to the bidirectional clutch 102. The pulley 98 is connected to the pulley 98 via a pulley.

  A pulley 100 is disposed on the side of the fire hydrant valve opening / closing lever 36 provided on the side of the fire hydrant door corresponding to the pulley 98 of the remote operation mechanism 62, and the pulleys 98, 100 are connected by a link wire 101 to form a parallel link. A wire mechanism is configured, and a remote operation for opening and closing the hydrant valve 46 by operating the hydrant valve opening / closing lever 36 is performed. A second bidirectional clutch 104 is arranged between the operation shaft of the hydrant valve opening / closing lever 36 and the drive shaft of the pulley 100.

  A two-way clutch 102 provided between the electric actuator 60 and the hydrant valve 46 transmits rotation from the input shaft 102a to the output shaft 102b, and conversely transmits rotation from the output shaft 102b to the input shaft 102a. It is equipped with a clutch function that transmits rotation only in one direction that is idling without rotating.

  The same applies to the second bidirectional clutch 104 provided on the fire hydrant valve opening / closing lever 36 side, transmitting the rotation from the input shaft 104a to the output shaft 104b, but conversely, from the output shaft 104b to the input shaft 104a. The clutch has a clutch function of transmitting rotation only in one direction of idle rotation without transmitting rotation.

  When the electric actuator 60 is driven, the rotation of the drive shaft of the electric actuator 60 rotates the pulley 98 and the valve shaft of the fire hydrant valve 46 via the two-way clutch 102, and the electric actuator 60 can open and close the fire hydrant valve 46.

  At this time, the rotation of the pulley 98 is transmitted to the pulley 100 via the link wire 101 and rotates. However, since the second bidirectional clutch 104 receives the rotation input from the output shaft 104b, the input shaft 104a rotates. The hydrant valve opening / closing lever 36 does not move.

  As shown in FIG. 1, the automatic inspection of the fire hydrant device 10 is performed in a state where the fire hydrant door 14 of the fire hydrant device 10 is closed, and when the fire hydrant door 14 is closed, the fire hydrant valve arranged on the back side of the door. The opening / closing lever 36 is in a state where it cannot move by hitting a peripheral member.

  However, in the inspection system of the present embodiment, the provision of the second two-way clutch 104 allows the hydrant valve opening / closing lever 36 not to move even when the hydrant valve 46 is driven to open and close by the electric actuator 60 during automatic inspection. Automatic inspection can be performed without any problems.

  On the other hand, when a fire occurs in the tunnel, the road user opens the fire hydrant door 14, pulls out the hose 38 with the water discharge nozzle, and then opens the fire hydrant valve opening / closing lever 36. At this time, the pulley 100 is rotated via the second bidirectional clutch 104 by the opening operation of the fire hydrant valve opening / closing lever 36, the pulley 98 is rotated in conjunction with the link wire 101, and the fire hydrant valve 46 is driven to open. .

  However, since the rotation of the pulley 98 is a rotation input from the output shaft 102b of the bidirectional clutch 102, the rotation is not transmitted to the input shaft 102a and the electric actuator 60 idles, and even if the electric actuator 60 is provided, the fire hydrant is provided. The operation of the valve opening / closing lever 36 is not affected, and the opening / closing operation of the fire hydrant valve 46 can be performed by operating the fire hydrant opening / closing lever 36 as in the case where the electric actuator 60 is not provided.

  If the fire hydrant device 10 is to be inspected by opening the fire hydrant door, the fire hydrant valve opening / closing lever 36 may be moved by the opening / closing drive by the electric actuator 60. Therefore, the second bidirectional clutch 104 is provided. No need.

  An open / close detector 70 for detecting the opening / closing of the hydrant valve 46 is provided on the shaft of the pulley 98 on the side of the hydrant valve 46. As the open / close detector 70, for example, a limit switch for detecting the opening of the hydrant valve 46 and a limit switch for detecting the closing of the hydrant valve 46 are provided.

  The open / close detector 70 detects open / close of the fire hydrant valve 46 at the time of inspection of the fire hydrant device 10, and an open detection signal when the fire hydrant open / close lever 36 is operated is used as a pump start signal.

  The open / close detector 70 may be provided on the shaft of the pulley 100 on the side of the fire hydrant valve opening / closing lever 36. In this case, in addition to detecting the open / close of the fire hydrant valve 46 by the electric actuator 60, the remote operation mechanism 62 The remote opening and closing function can be detected together.

  Further, the motor-driven electric actuator 60 has a built-in torque limiter. When the drive torque to the fire hydrant valve 46 exceeds a predetermined value, the torque torque limiter operates to release the driving force, thereby preventing damage due to motor overheating. Can be prevented. When the torque limiter of the electric actuator 60 operates, for example, a limiter pin projects, so that the torque limiter operation sensor 61 detects this.

[Discharge operation of fire hydrant device]
FIG. 6 is an explanatory diagram showing the operation when the fire hydrant valve opening / closing lever is opened in the event of a fire. When a fire occurs due to a vehicle accident or the like in the tunnel, the road user opens the fire hydrant door 14 of the fire hydrant device 10 shown in FIG. 1 installed in the tunnel as shown in FIGS. The water discharge nozzle 40 held inside 14 is taken out, the hose 38 is pulled out, and then the hydrant valve opening / closing lever 36 is operated to the open position on the near side of the lever 36.

  As shown in FIG. 6, when the hydrant valve opening / closing lever 36 is operated to the open position, the pulley 100 is rotated via the second bidirectional clutch 104, and the pulley 98 is rotated via the link wire 101, whereby the pulley 98 is rotated. The fire hydrant valve 46 is driven to open. At this time, since the bidirectional clutch 102 receives the rotation input from the output shaft 102b side, the rotation is not transmitted to the input shaft 102a, and the fire hydrant valve 46 can be opened without being affected by the electric actuator 60.

  In addition, the opening and closing detector 70 detects the opening of the fire hydrant valve 46 by the rotation of the pulley 98, and based on this, a pump start signal is transmitted to the disaster prevention receiver side, and the operation of the fire extinguishing pump equipment is started and the pressure is increased. Continuous supply of fire extinguishing water is started.

  When the fire hydrant valve 46 is opened, the fire extinguishing water is supplied to the inspection switching valve 50 via the automatic pressure regulating valve 48. At this time, the inspection switching valve 50 pushes the piston 90 by the spring 96 to move the valve body 82 to the second position. Is held at the water discharge switching position in which the drain port 80 is closed by contacting the valve seat 88 of the, and the fire extinguishing water flows from the valve hole 84 in the open state to the outlet 78, and is supplied from the pipe 47 to the hose side, Water will be discharged from the water discharge nozzle.

  When the fire is extinguished and the water discharge is stopped, the hydrant valve opening / closing lever 36 is returned to the original closed position, and the hydrant valve 46 is operated to the closed position via the remote control mechanism 62.

[Automatic inspection of fire hydrant equipment]
FIG. 7 is an explanatory view showing the operation at the time of automatic inspection. In the automatic inspection of the fire hydrant device 10, when an inspection start operation is performed on the disaster prevention receiver side, the inspection of the plurality of fire hydrant devices 10 is performed in order by transmitting an inspection instruction signal.

  Upon receiving the inspection instruction signal from the disaster prevention receiver, the inspection control unit 75 shown in FIG. 4 first controls the opening of the pilot motor-operated valve 52, as shown in FIG. Fire extinguishing water is supplied to the chamber 94.

  When fire extinguishing water is supplied to the cylinder chamber 94, the piston 90 moves while compressing the spring 96, and moves and separates the valve element 82 from the second valve seat 88 to open the drain port 80 and move the interval X. Then, by contacting the first valve seat 85 to close the valve hole 84, the inflow port 76 and the outflow port 78 are separated, and the water discharge switching position is switched to the drain switching position.

  When the inspection switching valve 50 is switched to the drain switching position, the second strain sensor 66 is pressed by the movement of the interval X of the piston 90, and a distortion detection signal indicating the drain switching position is sent to the inspection control unit 75 in FIG. Output, the inspection control unit 75 determines that the inspection switching valve 50 has been normally switched to the drainage switching position, and then drives the electric actuator 60 to open the fire hydrant valve 46 to open the bidirectional clutch 102. Then, the hydrant valve 46 is driven to open via the pulley 98.

  When the fire hydrant valve 46 is driven to open, the fire extinguishing water from the primary side is supplied to the inspection switching valve 50 via the automatic pressure regulating valve 48, and at this time, the inspection switching valve 50 is switched to the drain switching position. Therefore, the fire extinguishing water supplied from the inflow port 76 flows from the drain port 80 to the drain hose 58, and performs a check water discharge for draining a water amount corresponding to the actual water discharge from the water discharge nozzle 40 of the hose 38.

  The pressure of the drain hose 58 connected to the inspection switching valve 50 is detected by the pressure sensor 68 and output to the inspection control unit 75 in FIG. Compared with the set pressure of 0.29 MPa, if it is within a predetermined error range with respect to the set pressure, it is determined to be normal. A fault alarm indicating the deviation is output, and the work of adjusting the set pressure of the automatic pressure regulating valve 48 after the inspection is completed is performed.

  If the set pressure is significantly lower or significantly higher than the set pressure, it is determined that the automatic pressure regulating valve 48 has failed, and a failure alarm is output from the disaster prevention receiver panel. After the inspection, the automatic pressure regulating valve 48 is repaired or replaced. Will be done.

  During the inspection, the fire extinguishing water supplied to the cylinder chamber 94 of the inspection switching valve 50 flows to the drainage side via the orifice 54 and the check valve 56, but the amount of drainage is restricted by the orifice 54, The supply amount of the fire extinguishing water from the pipe 53 is sufficiently higher than the drainage amount, the water pressure in the cylinder chamber 94 is maintained, and the piston 90 can hold the valve element 82 at the drainage switching position.

  When the pressure determination by the pressure sensor 68 is completed, the inspection is terminated and the inspection restoration control is performed. The inspection restoration control may be performed according to an instruction from the disaster prevention receiving panel, or may be automatically performed as a control procedure of the inspection control unit 75.

  In the inspection restoration control, the inspection control unit 75 shown in FIG. 4 first performs control to drive the electric actuator 60 in the closing direction to drive the fire hydrant valve 46 to be closed. As a result, the fire hydrant valve 46 is closed, the supply of fire extinguishing water to the inspection switching valve 50 is stopped, and the drainage to the drain hose 58 is stopped.

  When the fire hydrant valve 46 is closed, since the closing of the open / close detector 70 is detected, the inspection control unit 75 subsequently performs the closing control of the pilot electric valve 52 based on this. When the pilot motor-operated valve 52 is closed, the supply of fire-extinguishing water to the cylinder chamber 94 of the inspection switching valve 50 stops, and the fire-extinguishing water in the cylinder chamber 94 passes through the check valve 56 at a predetermined amount of water throttled by the orifice 54. The piston 90 is moved by being pushed by the spring 96 in accordance with a decrease in the pressure of the cylinder chamber 94, and the valve body 82 is switched to the water discharge switching position in which the valve body 82 contacts the second valve seat 88 to close the drain port 80. .

  As described above, when the inspection switching valve 50 is slowly switched from the drainage switching position to the water discharge switching position with the drainage regulated by the orifice 54 in a state where the supply of the fire extinguishing water from the primary side is stopped, the outlet 78 is in the process. And the drain port 80 are in communication with each other through the valve hole 84, and the outlet port 78 is open to the atmosphere via the hose 38. Therefore, the secondary of the fire hydrant valve 46 closed from the inflow chamber side of the valve body 51. The fire extinguishing water staying between the sides is discharged from the drain hose 58 and does not remain in the piping.

  When the inspection switching valve 50 is switched to the water discharge switching position, a distortion detection signal indicating the detection of the water discharge switching position is output from the first strain sensor 64 that has been pressed by the piston 90, whereby the inspection control unit 75 performs the inspection. Knowing that the switching valve 50 has been restored, the end of the inspection is determined, the end of the inspection is notified to the disaster prevention receiver, and the next fire hydrant device is inspected.

  In addition, by operating the manual inspection switch 74 shown in FIG. 4, the inspection of the fire hydrant device 10 can be performed at the installation location of the fire hydrant device 10 as in the automatic inspection described above.

[Inspection control of fire hydrant equipment]
FIG. 8 is a flowchart showing the inspection control of the fire hydrant inspection system, and the control operation is performed by the inspection control unit 75 shown in FIG.

  As shown in FIG. 8, when the inspection control unit 75 determines in step S1 that the inspection instruction signal has been received from the disaster prevention receiver, the process proceeds to step S2, in which the pilot electric valve 52 is controlled to open, and the piston / The fire extinguishing water is supplied to the cylinder mechanism to perform switching drive for switching from the water discharge switching position shown in FIG. 5 to the drain switching position shown in FIG.

  Subsequently, when the inspection control unit 75 determines in step S3 that the drainage switching position has been detected from the distortion detection signal of the second distortion sensor, the process proceeds to step S4, in which the electric actuator 60 is controlled to open, thereby driving the fire hydrant valve 46 to open. Then, the fire-extinguishing water is supplied to the inspection switching valve 50 via the automatic pressure regulating valve 48, and the fire-extinguishing water is supplied to the drain hose 58 via the inspection switching valve 50 which has been switched to the drain switching position.

  Subsequently, the inspection control unit 75 proceeds to step S5, measures the drainage pressure with the pressure sensor 68 provided on the drainage hose 58, and if it is determined normal in step S6, transmits a drainage pressure normal signal to the disaster prevention receiving panel in step S7. On the other hand, if it is determined in step S6 that the drainage pressure is abnormal, a drainage pressure abnormality signal is transmitted to the disaster prevention receiver in step S8.

  Subsequently, when the inspection control unit 75 determines in step S9 that the inspection end signal has been received from the disaster prevention receiving board, the process proceeds to step S10, in which the electric actuator 60 is controlled to close, the fire hydrant valve 46 is closed, and the inspection switching valve 50 is passed. To stop the inspection and drainage. Subsequently, in step S11, the pilot motor-operated valve 52 is controlled to close to drive the inspection switching valve 50 to the water discharge switching position. In step S12, the distortion detection signal of the first distortion sensor 64 is output. When the detection of the water discharge switching position is determined, the process proceeds to step S13, where an inspection end signal is transmitted to the disaster prevention receiver, and a series of inspection control ends.

[Open / close drive of fire hydrant valve by hydraulic actuator]
FIG. 9 is an explanatory diagram showing another embodiment of a fire hydrant device inspection system that drives a fire hydrant valve to be opened and closed by a hydraulic actuator.

  In the embodiment of FIG. 5, the electric actuator 60 is provided for opening and closing the fire hydrant valve 46, but in the present embodiment, as shown in FIG. 110 are provided.

  The hydraulic actuator 110 includes a hydraulic drive mechanism 110 functioning as a second drive mechanism and a rack and pinion mechanism. In the hydraulic drive mechanism 110, a piston 116 is slidably provided in a cylinder chamber 114, and the piston 116 is held at an initial position by a spring 118. A pilot pipe 128 branched from the pipe 45 is connected to the cylinder chamber 114, and a second pilot motor-operated valve 130 is provided in the pilot pipe 128. Further, the cylinder chamber 114 is connected to a drain side via an orifice 115.

  A rack gear 122 is connected to a piston rod 120 from a piston 116 of the hydraulic drive mechanism picture 110, and a pinion gear 124 meshes with the rack gear 122. The rack and pinion mechanism including the rack gear 122 and the pinion gear 124 converts a linear motion of the hydraulic drive mechanism 112 by the piston 116 into a rotary motion.

  The rotation shaft of the pinion gear 124 is connected to the valve shaft of the fire hydrant valve 46 via a two-way clutch 126. The two-way clutch 126 is the same as the two-way clutch 102 in FIG. 5 and transmits rotation from the input shaft 126a to the output shaft 126b, but does not transmit rotation from the output shaft 126b to the input shaft 126a.

  Other configurations and functions are the same as those in the embodiment of FIG. 5, and therefore, the same reference numerals are given and the description is omitted.

  In the present embodiment, when the inspection switching valve 50 is switched to the drain switching position by the opening control of the pilot electric valve 52 at the time of inspection of the fire hydrant device 10, subsequently, the second pilot of the hydraulic actuator 110 is operated. The opening of the electric valve 130 is controlled.

  When the second pilot motor-operated valve 130 is controlled to open, the fire extinguishing water is supplied to the cylinder chamber 114 of the hydraulic drive mechanism 112, the piston 116 moves while compressing the spring 118, and the pinion gear 114 is moved by the linear movement of the rack gear 122. Is rotated to open the hydrant valve 46 via the two-way clutch 126.

  As a result, fire extinguishing water is supplied from the opened fire hydrant valve 46 to the inspection switching valve 50 via the automatic pressure regulating valve 48, the fire extinguishing water is supplied through the drain hose 58, and the drain pressure is measured by the pressure sensor 68. Is determined.

  During the inspection, the fire extinguishing water supplied to the cylinder chamber 114 of the hydraulic drive mechanism 110 flows to the drainage side via the orifice 115, but the amount of drainage is restricted by the orifice 115, and the fire extinguishing water from the pilot pipe 128. Is sufficiently higher than the drainage amount, the water pressure in the cylinder chamber 114 is maintained, and the hydrant valve 46 can be held at the open position by the piston 116 via the rack and pinion mechanism.

  When the check water discharge for measuring the drain pressure is completed, first, the second pilot motor-operated valve 130 is controlled to be closed, the supply of the fire extinguishing water to the cylinder chamber 114 of the hydraulic drive mechanism 112 is stopped, and the fire extinguishing water in the cylinder chamber 114 is supplied to the orifice. The pressure is reduced by being drained through 115, the piston 116 is pushed back to the initial position by the spring 118, the pinion gear 124 is rotated in the opposite direction by the rack gear 122, and the fire hydrant valve 46 is It is driven to close and closes.

  Subsequently, the inspection switching valve 50 is restored to the water discharge switching position by the closing control of the pilot electric valve 52, and a series of inspection operations is completed.

  In the hydraulic actuator 110 of the present embodiment, the size of the pipe 45 is, for example, 40 to 45 mm in diameter, while the size of the pilot pipe 128 is 10 to 15 mm in diameter. Further, compared to the electric actuator 60 having the motor shown in FIG. 4, the second pilot motor-operated valve 130 provided in the pilot pipe 128 can be a small motor-operated valve, reducing power consumption and increasing the size of the cable laid in the tunnel. And the capacity of the emergency power supply can be reduced, so that the cost can be reduced accordingly.

[Three-way switching valve]
Although the above embodiment shows the inspection switching valve 50 used in the fire hydrant inspection system, the inspection switching valve 50 can be generally used as a three-way switching valve.

  When the inspection switching valve 50 is a general three-way switching valve, as shown in FIG. 5, the inlet 76, the first outlet 78, and the second outlet 80 (here, drainage) are connected to the valve body 51. The port 80 is referred to as a second outlet 80), and the movement of the valve body 82 by the piston-cylinder mechanism allows the inlet 76 to communicate with the first outlet 78 and the inlet 76 to the second outlet. And a second switching position for disconnecting the inlet 76 and the first outlet 78 and for connecting the inlet 76 and the second outlet 80.

  Further, the inside of the valve body 51 is divided into an inflow chamber in which an inflow port 76 is formed by a partition wall 83 and an outflow chamber in which a first outflow port 78 is formed, and an inflow chamber of a valve hole 84 formed in the partition wall 83. A first valve seat 85 is formed on the side, a second outlet 80 is formed coaxially with the body outer shell facing the valve hole 84, and a first outlet 80 is formed on the inflow chamber side of the second outlet 80. A second valve seat 88 is formed opposite to the first valve seat 85, and a valve body 82 axially moved by a piston-cylinder mechanism is disposed between the first valve seat 85 and the second valve seat 88. The piston / cylinder mechanism holds the piston 90 housed in the cylinder chamber 94 at a first switching position where the valve body 82 abuts on the second valve seat 88 by a spring 96. The piston 90 is moved to the first valve seat 85 by supplying the fire extinguishing water. It is configured to move to the second switching position for contact.

  With such a configuration, a function as a three-way switching valve that selectively switches the first or second outflow ports 78 and 80 with respect to the inflow port 76 by the linear movement of the valve element 82 driven by the hydraulic pressure of the piston / cylinder mechanism is realized. The switching operation of the three-way switching valve can be performed by supplying fire extinguishing water with a small pilot-operated valve provided in a small-diameter pilot pipe, so that power consumption, cable size, and power supply capacity can be reduced. The cost can be reduced accordingly.

  Further, since the valve element 82 is brought into contact with the first or second valve seats 85 and 88 as compared with the conventional three-way electric switching valve that rotates the valve element, the conventional three-way electric switching valve that rotates the valve element is used. There is no such water leakage, and the inlet 76 can be selectively switched to the first outlet 78 or the second outlet 80 without fail.

  In addition, the inspection switching valve 50 functioning as a three-way switching valve normally holds the valve body 82 at the first switching position by the force of the spring 96, communicates with the first outlet 78 side, and connects to the second outlet port. The outlet 80 side is fully closed, and a high fail-safe function can be obtained by maintaining the first switching position irrespective of power loss.

[Modification of the present invention]
(Monitoring of valve body and valve seat)
In the above embodiment, the opening / closing of the valve is detected by various sensors, but furthermore, a strain sensor or a contact sensor is embedded in the seal of the valve body or the valve seat so that the seating state of the valve body can be monitored. You may do it. As a result, it is possible to detect dust clogging of the valve body, detect abnormalities in the operation of the valve body, etc. as soon as possible, and to prevent failures and preventive maintenance.

(Sensor power supply)
In the above embodiment, various sensors are operated by power supply from the outside, but a piezoelectric power generation element or a magnetostrictive power generation element is arranged at a position where vibration is generated by a water flow, and used as a sensor power supply. You may. As a result, there is no need to supply a sensor power from the outside, so that the cost can be reduced and the system can be simplified.

  For example, a spring 96 provided on the inspection switching valve 50 is coated with a piezoelectric power generating element to be used as a sensor-power source. Specifically, a lower electrode layer, a piezoelectric layer, and an upper electrode layer are stacked on the surface of the spring 96, and a pair of lead wires is extracted to the outside from the lower electrode layer and the upper electrode layer.

  The manufacturing method is to apply a silver paste on the surface of a metal spring 96 to form a lower electrode layer, spray-coat the surface with a piezoelectric solvent, and dry with hot air to form a film. Applying a predetermined high voltage for a predetermined time from a corona electrode separated by a predetermined distance from the surface of the film and polarizing it to generate a piezoelectric layer, applying a silver pace on the upper surface of the piezoelectric layer to form an upper electrode layer, Finally, a lead wire is bonded to the upper electrode layer and the lower electrode layer using a conductive adhesive. Accordingly, the piezoelectric power generating element can be easily and easily provided on the spring 96, and the function as the spring 96 is not impaired even if the piezoelectric power generating element is provided.

(Other)
In the above-described embodiment, the automatic pressure regulating valve 48 is provided before the inspection switching valve 50. However, a water flow control unit such as a constant flow valve may be provided instead of the automatic pressure regulating valve 48. In any case, the pressure sensor 68 monitors the pressure of the fire-extinguishing water supplied from the inspection switching valve 50, and makes it possible to confirm whether the operation of the water flow control unit is correct.

  Further, in the above embodiment, a strain sensor is used as the position detector, but an appropriate method such as a combination of physical switches may be used. For example, the piston rod 92 is extended so as to penetrate the piston 90 and the cylinder chamber 94, a horizontal switch pressing portion is provided at the tip of the piston rod, and a water discharge switching position detection switch that contacts the switch pressing portion at the water discharge switching position; A drain switching position detection switch that contacts the switch pressing portion at the switching position is provided. With such a configuration, position detection can be performed at a position different from the cylinder chamber 94 filled with fire extinguishing water, and the degree of freedom in wiring and the like is increased.

  Further, the present invention includes appropriate modifications without impairing the objects and advantages thereof, and is not limited by the numerical values shown in the above embodiments.

10: Fire hydrant device 12: Device main body 14: Fire hydrant door 15: Maintenance door 16: Door handle 18: Notification device door 20: Push button notification device 22: Red indicator light 24: Speaker 25: Hinge 26: Fire extinguisher door 28: Fire extinguisher 30: Fire pipe connection port 32: Water supply valve 36: Fire hydrant valve opening / closing lever 38: Hose 40: Water discharge nozzle 42: Nozzle holder 43: Water supply main pipe 44: Start-up pipe 45, 47: Pipe 46: Fire hydrant valve 48: Automatic adjustment Pressure valve 50: Inspection switching valve 51: Valve body 52: Pilot electric valve 53, 128: Pilot pipe 54: Orifice 56: Check valve 58: Drain hose 60: Electric actuator 61: Torque limiter operation sensor 62: Remote control mechanism 64 : First strain sensor 66: second strain sensor 68: pressure sensor 70: open / close detector 72: pump start switch 74: hand Inspection switch 75: Inspection control unit 76: Inlet 78: Outlet 80: Drain port 82: Valve element 83: Partition wall 84: Valve hole 86: First valve seat 88: Second valve seat 90: Piston 92: Piston Rod 94: Cylinder chamber 96: Spring 98, 100: Pulley 101: Link wires 102, 104, 126: Bidirectional clutches 102a, 104a, 126a: Input shafts 102b, 104b, 126b: Output shaft 110: Hydraulic actuator 112: Hydraulic drive Mechanism 114: cylinder chamber 116: piston 118: spring 120: piston rod 122: rack gear 124: pinion gear 130: second pilot motor-operated valve

Claims (11)

In the fire hydrant inspection system that checks the function of the fire hydrant that discharges water by pulling out the hose with the nozzle,
The valve is moved by a drive mechanism having a piston provided in the cylinder chamber, which is provided following the fire hydrant valve in the pipe leading to the hose, thereby connecting the inlet and the outlet and disconnecting the inlet and the drain. A water discharge switching position, a check switching valve that disconnects the inflow port and the outflow port, and switches to a drainage switching position communicating the inflow port and the drain port,
A pilot motor-operated valve provided in a pipe for supplying fire-extinguishing water to the drive mechanism of the inspection switching valve,
An actuator for opening and closing the hydrant valve,
A switching position detector for detecting the water discharge switching position or the drainage switching position of the inspection switching valve,
When the inspection starts, the pilot motor-operated valve is opened and the inspection switching valve is switched to the drainage switching position. When the drainage switching position is detected by the switching position detector, the fire hydrant valve is controlled by the actuator. An inspection control unit that opens and drives the fire extinguishing water to the drainage side via the inspection switching valve to perform inspection.
A fire hydrant device inspection system, comprising:
In the fire hydrant device inspection system according to claim 1,
After the inspection is completed, the inspection control unit closes the fire hydrant valve by the actuator to restore the fire hydrant valve, and then controls the pilot electric valve to close and switches the inspection switching valve to the water discharge switching position to restore the inspection. A fire hydrant inspection system.
In the fire hydrant device inspection system according to claim 1,
A pressure sensor is provided on the drain side of the switching valve for inspection,
The fire hydrant device inspection system, wherein the inspection control unit determines whether or not the pressure of the fire extinguishing water supplied from the inspection switching valve is appropriate based on the detection pressure of the pressure sensor and notifies the user of the determination.
In the fire hydrant device inspection system according to claim 1,
The fire hydrant device inspection system, wherein the inspection control unit determines whether or not the inspection switching valve has correctly operated based on the position detection by the switching position detector and notifies the user of the operation.
In the fire hydrant device inspection system according to claim 1,
The switching valve for inspection,
The interior of the valve body is partitioned by a partition into an inflow chamber in which the inflow port is formed and an outflow chamber in which the outflow port is formed,
A first valve seat is formed on the inflow chamber side of a valve hole formed in the partition wall, and the discharge port is formed coaxially with an outer shell facing the valve hole, and the inflow of the discharge port is performed. A second valve seat is formed on the chamber side relative to the first valve seat;
A valve body that is axially moved by the drive mechanism is disposed between the first valve seat and the second valve seat,
The drive mechanism holds the piston housed in the cylinder chamber at the water discharge switching position where the valve body abuts on the second valve seat by a spring, and extinguishes fire by opening control of the pilot motor-operated valve. The piston is moved to the drain switching position where the piston is brought into contact with the first valve seat by supplying water, and the cylinder chamber is connected to a drain side via an orifice that regulates a predetermined drain amount. Fire hydrant equipment inspection system.
In the fire hydrant device inspection system according to claim 1,
A fire hydrant device inspection system, wherein the inspection switching valve has a drain hose connected to the drain port through a detachable joint.
In the fire hydrant device inspection system according to claim 1,
The switching position detector,
A water discharge switching position detector that detects movement of the valve body to the water discharge switching position by the drive mechanism,
A drainage switching position detector that detects movement of the valve body to the drainage switching position by the drive mechanism;
A fire hydrant device inspection system, comprising:
In the fire hydrant device inspection system according to claim 7,
The water discharge switching position detector, a first strain sensor that detects the water discharge switching position by receiving the pressure of the piston when the valve body is moved to the water discharging position by the drive mechanism,
The drainage position detector may be a second strain sensor that detects a drainage switching position by receiving pressure from the piston when the valve mechanism is moved to the drainage switching position by the drive mechanism. Fire hydrant inspection system.
In the fire hydrant device inspection system according to claim 1,
A fire hydrant device inspection system, wherein the actuator is an electric actuator driven by a motor.
In the fire hydrant device inspection system according to claim 9,
The electric actuator includes a torque limiter that operates when the driving torque exceeds a predetermined torque to release the driving force,
The inspection system for a fire hydrant device, wherein the inspection control unit stops driving the motor and outputs a failure alarm when the operation of the torque limiter is detected.
  The valve body has an inflow port, a first outflow port, and a second outflow port, and the valve body is moved by a drive mechanism having a piston provided in the cylinder chamber, so that the inflow port and the first outflow port are communicated. A first switching position for disconnecting the inlet and the second outlet, and a second switching position for disconnecting the inlet and the first outlet and communicating the inlet with the second outlet. A three-way switching valve characterized by switching between

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