JP7179558B2 - Fire hydrant equipment inspection system - Google Patents

Description

TECHNICAL FIELD The present invention relates to a fire hydrant device inspection system for inspecting a fire hydrant device installed in a tunnel for extinguishing a fire by pulling out a hose with a nozzle.

Conventionally, a fire hydrant system is provided as emergency equipment for tunnels installed in tunnels such as highways and motorways. The fire hydrant system has a fire hydrant door that can be opened freely, and consists of a hose with a nozzle attached to the tip and a fire hydrant valve. Contains valves including

Fire hydrant devices are generally installed embedded in the tunnel wall at intervals of, for example, 50 meters along the tunnel side wall. They are installed to extinguish fires of a large scale and early stages.

Tunnel fire hydrants are very important equipment as an initial fire extinguishing means in road tunnels.

However, after the road is put into service, there are time constraints and safety concerns, such as conducting inspections while vehicles are on the road, or implementing inspections when road regulations or road closures are implemented in conjunction with other facilities. There are many issues regarding maintenance and management, such as the above regulations.

Furthermore, with the emergence of long urban tunnels in recent years, considering the minimum required time for each fire hydrant multiplied by the inspection time for each fire hydrant system and the number of installations, it is necessary to conduct inspections every day. It is becoming more difficult to maintain and improve the In addition, it is certain that the declining birthrate and aging population will progress socially in the future, and in addition to the succession of technology, solving the problem of not being able to secure inspection personnel due to the lack of personnel is an urgent issue.

As a method for solving such problems, an inspection system for a tunnel fire hydrant device shown in Patent Document 1 has been proposed. In this inspection system, a motor-operated valve is provided in parallel with the fire hydrant valve, and a three-way switching motor-operated valve is provided on the secondary side of the automatic pressure regulating valve device following this. After switching the motor-operated valve from the water supply side to the hose to the drain side, the motor-operated valve parallel to the fire hydrant valve is opened to allow fire extinguishing water to flow to the drain side. We are checking whether the normal water discharge pressure can be obtained by the pressure regulating valve.

JP 2011-120717 A

However, in such a conventional fire hydrant device inspection system, it is not possible to inspect the opening and closing operation of the fire hydrant valve and the remote control mechanism using the link wire that opens and closes the fire hydrant valve by the fire hydrant valve opening and closing lever. The current situation is that inspections are still dependent on the inspector, such as inspections centered on the set value of the pressure regulating valve, and more detailed inspections can be performed to ensure the maintenance of functions, saving labor and increasing reliability. Various requests to ensure sexuality have not been adequately met.

The present invention makes it possible to remotely and automatically inspect the important functions of a fire hydrant system including a fire hydrant valve and its remote control mechanism, reduce power consumption during inspection, and reliably detect abnormalities in the equipment to be inspected. It is an object of the present invention to provide a fire hydrant device inspection system that makes it possible.

(Fire hydrant device inspection system)
The present invention is a fire hydrant device inspection system for inspecting a fire hydrant device that discharges water from a hose,
A fire hydrant valve provided in a pipe leading to a hose and opened and closed by operating a fire hydrant valve opening and closing lever via a remote control mechanism;
A water discharge switching position that connects the inflow port and the outflow port and disconnects the inflow port and the outflow port by moving the valve body by the drive mechanism that is provided following the fire hydrant valve and has a piston in the cylinder chamber, and the inflow port and the flow. an inspection switching valve that disconnects the outlet and switches to a drainage switching position that communicates the inlet and the outlet;
A pilot motor operated 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 the fire hydrant valve via a remote control mechanism ;
a switching position detector that detects the water discharge switching position or the drainage switching position of the inspection switching valve;
When inspection starts, the switching valve for inspection is switched to the drainage switching position by controlling the opening of the pilot motorized valve, and when the switching position detector detects the switching position for drainage, the actuator controls the fire hydrant valve to open and switch for inspection. an inspection control unit for performing inspection by flowing fire extinguishing water to the drain side through a valve;
is provided.

(Restoration after completion of inspection)
When the inspection is completed, the inspection control unit closes the fire hydrant valve by the actuator to restore the operation, and then controls the pilot motor-operated valve to close to switch the inspection switching valve to the water discharge switching position to restore the operation.

(Monitoring the operation of the automatic pressure regulating valve)
A pressure sensor is provided on the drain side of the inspection switching valve,
The inspection control unit determines whether or not the set pressure of the automatic pressure regulating valve and the pressure regulating function are appropriate based on the pressure detected by the pressure sensor, and notifies.

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

(Structure of switching valve for inspection)
The switching valve for inspection is
the interior of the valve body is partitioned by a partition into an inflow chamber having an inflow port and an outflow chamber having an outflow port;
A first valve seat is formed on the inflow chamber side of the valve hole formed in the partition wall, a drain port is coaxially formed in the outer shell facing the valve hole, and a second valve port is formed on the inflow chamber side of the drain port. a second valve seat is formed opposite the first 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;
In the drive mechanism, the piston housed in the cylinder chamber is held by a spring in a water discharge switching position in which the valve body is brought into contact with the second valve seat. 1, and the cylinder chamber is connected to the drainage side through an orifice that regulates a predetermined amount of drainage.

(Switching position detector)
The switching position detector is
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 for detecting movement of the valve body to the drainage switching position by the drive mechanism;
Prepare.

(strain sensor)
The water discharge switching position detector is 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 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 the pressure of the piston when the drive mechanism moves the valve body to the drainage switching position.

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

(torque limiter )
The electric actuator has a torque limiter that operates to release the driving force when the driving torque exceeds a predetermined torque,
The inspection control unit stops driving the motor and outputs a failure alarm when the operation of the torque limiter is detected.

A clutch mechanism is provided between the remote control mechanism and the fire hydrant valve, between the remote control mechanism and the fire hydrant valve opening/closing lever, or between the remote control mechanism and the fire hydrant valve.

(basic effect)
The present invention is a fire hydrant device inspection system that performs functional inspection of a fire hydrant device that discharges water from a hose . a fire hydrant valve, a water discharge switching position in which the inflow port and the outflow port are communicated and the inflow port and the drain port are separated by movement of a valve body provided following the fire hydrant valve and having a piston provided in the cylinder chamber, and A switching valve for inspection that separates the inflow port and the outflow port and switches to a drainage switching position that communicates the inflow port and the drain port; , an actuator that opens and closes the fire hydrant valve via a remote control mechanism, a switching position detector that detects the water discharge switching position or drainage switching position of the inspection switching valve, and the inspection start by controlling the opening of the pilot electric valve for inspection When the switching valve is switched to the drainage switching position and the switching position detector detects the drainage switching position, the actuator controls the fire hydrant valve to open and the fire extinguishing water flows to the drainage side through the inspection switching valve for inspection. Since an inspection control unit was provided to perform inspections, advanced inspections of important functions of fire hydrant systems, including fire hydrant valves and their remote control mechanisms, which were not inspected in the past, can be automatically performed for many fire hydrant systems installed in tunnels. Can be done continuously.

In addition, the switching valve for inspection that switches from the water discharge side to the drainage side during inspection is a water pressure driven type that is switched by the supply of fire extinguishing water to the drive mechanism by the pilot motor operated valve. The electric valve can be made small, power consumption can be reduced, the size of the cable laid in the tunnel can be reduced, the capacity of the emergency power supply can be reduced, and the cost can be reduced accordingly.

Also, during inspection, in order to prevent accidental 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 drainage switching position that closes the hose side and opens the drainage side, the switch to the drainage switching position is detected by the switching position detector, and the actuator is driven to open the fire hydrant valve, switching for inspection By opening the fire hydrant valve after confirming that the valve has been switched to the drain side, erroneous water discharge from the hose can be reliably prevented.

(Effects of restoration after completion of inspection)
In addition, after the inspection is completed, the inspection control unit closes the fire hydrant valve by the actuator and restores it, and then controls the pilot motor-operated valve to close and switches the inspection switching valve to the water discharge switching position for restoration. When the inspection of flowing fire extinguishing water to the drain side through the inspection fire hydrant valve is completed, first close the fire hydrant valve with the actuator to stop the fire extinguishing water flowing to the drain side through the inspection switching valve, and then By repeatedly switching the inspection switching valve to the water discharge switching position, it is possible to reliably prevent the fire extinguishing water from flowing into the hose and remaining there.

In addition, when the valve body is switched from the drainage switching position to the water discharge switching position in a state where the supply of fire extinguishing water to the inspection switching valve is stopped by closing the fire hydrant valve, the outflow port and the drainage port are communicated in the middle of the switch, and the flow Since the outlet is open to the atmosphere via a hose, the fire extinguishing water that has accumulated in the inflow chamber of the inspection switching valve and the primary side pipe is discharged from the drain outlet, and the water must be drained as the inspection is restored. It can be carried out.

(Effect of monitoring the operation of the automatic pressure regulating valve)
In addition, a pressure sensor is provided on the drain side of the inspection switching valve, and the inspection control unit judges and notifies 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. Appropriate measures such as readjusting the setting deviation of the water discharge set pressure from the pressure of the fire extinguishing water flowing to the drainage side through the inspection switching valve through automatic inspection of the fire hydrant device, or repairing and replacing the failure of the automatic pressure regulating valve. I can handle it.

(Effect of monitoring the operation of the switching valve for inspection)
In addition, since the inspection control unit judges whether or not the switching valve for inspection has operated correctly based on the position detection by the switching position detector, and notifies the user, it is possible to determine whether the switching valve for inspection has been switched correctly during inspection, and to check whether there is an abnormality. It is possible to reliably detect and notify whether a failure has occurred.

(Effect of structure of switching valve for inspection)
In addition, the inspection switching valve has a valve body whose inside is divided by a partition into an inflow chamber having an inflow port and an outflow chamber having an outflow port. A first valve seat is formed, a drain port is coaxially formed in the outer shell facing the valve hole, and a second valve seat faces the first valve seat on the inflow chamber side of the drain port. is formed between the first valve seat and the second valve seat. It is held at the water discharge switching position where it contacts the second valve seat, and the piston is moved to the water discharge switching position where it contacts the first valve seat by supplying fire extinguishing water by controlling the opening of the pilot electric valve, and furthermore, the cylinder is moved to the water discharge switching position where it contacts the first valve seat. Since the chamber is connected to the drainage side through an orifice that regulates the amount of drainage, the drainage switching position communicates with the drainage side from the water discharge switching position that communicates with the hose side by straight movement of the valve body driven by the water pressure of the drive mechanism. The function as a three-way switching valve that switches between positions can be realized, and the valve body can be rotated because the valve body is brought into contact with the first or second valve seat compared to the conventional three-way electric switching valve that rotates the valve body. Unlike the conventional three-way electric switching valve, there is no water leakage, and the inflow port can be selectively switched to the outflow port or the drain port without fail.

In addition, the switching valve for inspection normally maintains the valve body in the water discharge switching position by the force of the spring and communicates with the hose side and fully closes the water discharge side. A high fail-safe function can be obtained by holding

In addition, the cylinder chamber of the drive mechanism that switches and drives the inspection switching valve is connected to the drainage side via an 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 motor operated valve. Therefore, even if an inspection switching valve is provided, it is possible to reliably supply fire-fighting water to the hose side and discharge it by opening and closing the fire hydrant valve in the event of a fire.

(Effect of drain joint)
In addition, since the inspection switching valve is connected to the drain hose via a detachable joint, the drain hose can be detachably attached, for example, by installing a Machino joint. For inspection, water can be discharged for inspection by disconnecting the drain hose and connecting an inspection hose provided with a pressure gauge and a test nozzle to the joint of the drain port.

(Effect of switching position detector)
The switching position detector includes a water discharge switching position detector that detects movement of the valve body to the water discharge switching position by the drive mechanism, and a drainage switching position detector that detects movement of the valve body to the water discharge switching position by the drive mechanism. For example, the water discharge switching position detector is 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 discharge switching position by the drive mechanism. Since the switching position detector is a second strain sensor that detects the drainage switching position by receiving the pressure of the piston when the valve body is moved to the drainage switching position by the drive mechanism, the switching valve for inspection is detected during inspection. It is possible to reliably monitor and respond to whether the system operates normally or has an abnormality.

In addition, by installing 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 miniaturization. Furthermore, by detecting the operation of the valve body itself by the piston, the reliability of inspections, such as determination of the presence or absence of failure, is improved.

(Effect of electric actuator torque limiter)
Further, the actuator that opens and closes the fire hydrant valve is an electric actuator driven by a motor , and the electric actuator has a torque limiter that operates to release the driving force when the driving torque exceeds a predetermined torque. is designed to stop the motor drive and output a failure alarm when it detects the operation of the torque limiter. In addition, by detecting the operation of the torque limiter and giving an alarm, it is possible 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 body is provided with an inflow port, a first outflow port and a second outflow port, and a cylinder chamber is provided with a piston. A first switching position in which the inflow port and the first outflow port are communicated and the inflow port and the second outflow port are disconnected by movement of the body; More specifically, the inside of the valve body is divided into an inflow chamber having an inflow port formed by a partition wall and an outflow chamber having a first outflow port. A first valve seat is formed on the inflow chamber side of the valve hole formed in the partition wall, and a second outflow port is coaxially formed in the outer shell facing the valve hole. A second valve seat is formed opposite to the first valve seat on the inlet chamber side of the outlet of the valve, and the valve is axially moved between the first valve seat and the second valve seat by a drive mechanism. The drive mechanism holds the piston housed in the cylinder chamber at the first switching position where the valve body is brought into contact with the second valve seat by means of a spring. Since the piston is moved to the second switching position where it abuts against the first valve seat, the first or second outflow port can be selectively switched to the inflow port by the straight movement of the valve body by the hydraulic drive of the drive mechanism. The switching operation of the three-way switching valve can be achieved by supplying fire-fighting water with a small pilot motor-operated valve installed in a small-diameter pilot pipe. The size can be reduced, the power supply capacity can be reduced, and the cost can be reduced accordingly.

In addition, compared to the conventional three-way electric switching valve that rotates the valve body, the valve body is brought into contact with the first or second valve seat, so there is no water leakage like the conventional three-way electric switching valve that rotates the valve body. The inlet can be reliably switched selectively to the first outlet or the second outlet.

Further, the three-way switching valve normally maintains the valve body in the first switching position by the force of the spring to communicate with the first outflow port side and fully close the second outflow port side. Retaining the first switching position independently of the loss of C provides a high fail-safe capability.

The front view of a fire hydrant apparatus. 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 diagram showing the outline of the fire hydrant inspection system Explanatory diagram showing an embodiment of the equipment structure that constitutes the fire hydrant inspection system Explanatory diagram showing the operation when the fire hydrant valve open/close lever is operated to open in the event of a fire Explanatory diagram showing the operation during automatic inspection Flowchart showing automatic inspection control of fire hydrant device inspection system Explanatory drawing showing another embodiment of a fire hydrant device inspection system that opens and closes a fire hydrant valve by a hydraulic actuator

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

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 the door opening on the front right side of the device main body (housing) 12, and the inside thereof is a hose storage space and a maintenance door 15. It is a storage space for valves.

The fire hydrant door 14 is a forward-folding open/close door, and can be opened forward and downward by pulling out the door handle 16 on the upper side around the hinge on the lower side of the door. Above the fire hydrant door 14, a maintenance door 15 that opens and closes upward around the upper hinge is provided, and can be opened by lifting the fire hydrant door 14 upward after opening the door 14 for inspection.

A notification device door 18 is provided on the right side of a fire extinguisher door 26 provided at the left door opening of the device main body 12, and a push button notification device (transmitter) 20 and a red indicator lamp 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 pushed in, the push-button switch is turned on, and a fire notification signal is transmitted to the disaster prevention receiving panel of the monitoring center to issue a fire alarm. output.

The red indicator light 22 is always 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 to transmit a fire notification signal to the disaster prevention receiver panel of the monitoring center to issue a fire alarm. be.

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

A hose 38 is wound inwardly and stored in a hose storage space formed behind the fire hydrant door 14 of the device main body 12, and a water discharge nozzle 40 is attached to the tip of the hose 38, and the water discharge nozzle 40 is attached to the back surface of the fire hydrant door 14. It is detachably held by a nozzle holder 42 arranged in the .

In the valves storage space located on the right side of the hose storage space, a water discharge valve system including a water supply valve 32 and a fire hydrant valve is installed in the piping system from the fire extinguishing pipe connection port 30 to which the pipe from the pump equipment is connected to the hose connection port. is provided.

The fire hydrant valve is provided with a fire hydrant valve opening/closing lever 36 arranged on the back side of the fire hydrant door 14, and 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 device inspection system]
FIG. 4 is an explanatory diagram showing an outline of the fire hydrant device inspection system. As shown in FIG. 4, for the fire hydrant device 10, a riser pipe 44 branched from a water supply main pipe 43 is connected to a fire extinguishing pipe connection port 30, and extends from the fire extinguishing pipe connection port 30 to a hose 38 connection port. The piping 45 is provided with a water discharge valve system including the water supply valve 32 , the fire hydrant valve 46 and the 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 motor operated valve 52 is provided to open and close the inspection switching valve 50 by water pressure. be done.

The switching valve for inspection 50 has a water discharge line to which the hose 38 is connected to the inflow port on the secondary side of the automatic pressure regulating valve 48 and a drain line to which the drain hose 58 is connected. selectively switch. A cylinder chamber of the inspection switching valve 50 is connected to the drain side via an orifice 54 and a check valve 56 .

The fire hydrant valve 46 is connected to the fire hydrant valve opening/closing lever 36 installed on the back side of the fire 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 has a torque limiter that operates to release the driving force when the driving torque for the fire hydrant valve 46 exceeds a predetermined torque.

As a sensor for detecting the operating state in the function inspection of the fire hydrant device 10, a first strain sensor 64 that functions as a water discharge switching position detector and a drainage switching position detector are installed in the cylinder chamber of the piston-cylinder mechanism of the inspection switching valve 50. A second strain sensor 66 that functions as a vessel is provided, a drain hose 58 connected to the inspection switching valve 50 is provided with a pressure sensor 68 that detects the drain pressure, and a remote control mechanism 62 is equipped with a fire hydrant valve 46. An open/close detector 70 for detecting opening/closing is provided, and the electric actuator 60 is 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 this embodiment.

The inspection control unit 75 includes a control unit using a computer circuit and a communication unit that performs wired communication. Communication by the communication unit may be wireless communication. 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 actuation sensor 61 are input to the inspection control unit 75. A signal line is input from the manual inspection switch 74 , and a signal line is output to the pilot electric valve 52 and the electric actuator 60 . Further, a communication line is connected from a communication unit provided in the inspection control unit 75 to a disaster prevention receiving panel installed in a tunnel monitoring room or the like.

When the inspection control unit 75 receives an inspection instruction signal from the disaster prevention receiving panel accompanying automatic inspection, the inspection switching valve 50 is switched to the drainage switching position by controlling the opening of the pilot electric valve 52, and the second strain sensor 66 When the drain switching position is detected, the electric actuator 60 drives the fire hydrant valve 46 to open, and control is performed to flow fire extinguishing water to the drain hose 58 through the inspection switching valve 50 for inspection.

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

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

The interior of the valve body 51 is partitioned by a partition wall 83 into an inflow chamber having an inflow port 76 and an outflow chamber having an outflow port 78 formed therein. A drain port 80 is formed coaxially in the body shell facing the valve hole 84 and facing the first valve seat 85 on the inflow chamber side of the drain port 80 . A second valve seat 88 with a seat packing is thus formed.

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

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

A pilot pipe 53 branched from the pipe 45 is connected to the cylinder chamber 94 . A pilot motor-operated valve 52 is provided in the pilot pipe 53 . Since the fire extinguishing water is not supplied, the inspection switching valve 50 holds the water discharge switching position shown in the figure.

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, while the size of the pilot pipe 53 is 10 to 15 mm in diameter. While the electric power consumption of the provided electric motor valve is several tens of watts, the pilot electric valve 52 provided in the pilot pipe 53 with a small diameter can be a small electric valve, which reduces power consumption and can be installed in a tunnel. It is possible to reduce the cable size, reduce the capacity of the emergency power supply, etc., thereby reducing the cost.

Also, the cylinder chamber 94 of the inspection switching valve 50 is connected to the drain side via the orifice 54 and the check valve 56, and the fire extinguishing water is drained from the cylinder chamber 94 with the pilot motor operated valve 52 closed. The pressure of the piston 90 by the spring 96 enables the holding of the water discharge switching position. In addition, the check valve 56 prevents backflow of fire extinguishing water from the drain side to the cylinder chamber 94, thereby making it possible to reliably hold the inspection switching valve 50 at the water discharge switching position.

In the inspection switching valve 50 having such a structure, the pilot motor operated valve 52 is normally closed and the cylinder chamber 94 is not supplied with water for fire extinguishing. 2 valve seat 88, the inlet 76 and the outlet 78 are communicated through the valve hole 84, and the drain port 80 is closed to be separated from the inlet 76.

In this manner, the inspection switching valve 50 normally maintains the valve body 82 at the water discharge switching position by the force of the spring 96 to connect the inflow port 76 to the outflow port 78 on the hose side and fully close the drain port 80. A high fail-safe function is obtained by maintaining the water discharge switching position regardless of the loss of power.

A first strain sensor 64 functioning as a water discharge switching position detector is arranged in the cylinder chamber 94 of the inspection switching valve 50, and a second strain sensor 64 functioning as a water discharge switching position detector is arranged on the accommodation side of the spring 96. A sensor 66 is arranged.

Assuming that the axial distance between the first valve seat 85 and the second valve seat 88 in which the valve body 82 moves is X, the first strain sensor 64 causes the valve body 82 to move toward the second valve by the spring 96. A strain detection signal corresponding to the strain due to the pressing force at the water discharge switching position where the drain port 80 is closed by abutting against the seat 88 is output as the water discharge switching position detection signal.

Further, when the piston 90 compresses the spring 96 and moves by the distance X due to the supply of fire extinguishing water to the cylinder chamber 94, 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 applied. is output as a drainage switching position detection signal.

A drain port 80 of the inspection switching valve 50 is provided with a Machino joint 106 to which a drain hose 58 is detachably connected. A pressure sensor 68 with a pressure gauge is provided in the middle of the drain hose 58, and it is possible to measure the pressure when a water discharge test is performed by draining fire-fighting water into the drain hose 58 via the inspection switching valve 50 at the time of inspection. there is A flow rate sensor may be provided on the drain hose 58 to measure the flow rate when the water discharge test is performed.

(electric actuator)
The electric actuator 60 is an actuator that opens and closes the fire hydrant valve 46 by means of a motor, and since the valve shaft of the fire hydrant valve 46 is connected to the pulley 98 of the remote control mechanism 62 , the output of the electric actuator 60 is applied to the two-way clutch 102 . It is connected to the pulley 98 via.

A pulley 100 is arranged on the side of the fire hydrant valve opening/closing lever 36 installed on the side of the fire hydrant door corresponding to the pulley 98 of the remote control mechanism 62, and a parallel link is formed by connecting the pulleys 98 and 100 with a link wire 101. A wire mechanism is configured, and remote control for opening and closing the fire hydrant valve 46 is performed by operating the fire hydrant valve opening/closing lever 36 . A second two-way clutch 104 is arranged between the operating shaft of the fire 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 fire hydrant valve 46 transmits rotation from the input shaft 102a to the output shaft 102b, but does not transmit rotation from the output shaft 102b to the input shaft 102a. Equipped with a clutch function that transmits rotation only in one direction, in which the rotation is idling.

This is the same for the second two-way clutch 104 provided on the side of the fire hydrant valve open/close lever 36, which transmits rotation from the input shaft 104a to the output shaft 104b, but conversely, from the output shaft 104b to the input shaft 104a. Equipped with a clutch function that transmits rotation only in one direction 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 drive the fire hydrant valve 46 to open and close.

At this time, the rotation of the pulley 98 is transmitted to the pulley 100 through the link wire 101 and rotates. The fire hydrant valve open/close lever 36 does not move.

Automatic inspection of the fire hydrant device 10 is performed with the fire hydrant door 14 of the fire hydrant device 10 closed, as shown in FIG. The opening/closing lever 36 is in a state where it cannot move due to contact with peripheral members.

However, in the inspection system of this embodiment, since the second two-way clutch 104 is provided, even if the fire hydrant valve 46 is driven to open and close by the electric actuator 60 during automatic inspection, the fire hydrant valve open/close lever 36 does not move. , automatic inspection can be performed without problems.

On the other hand, when a fire breaks out in the tunnel, the road user opens the fire hydrant door 14 and pulls out the hose 38 with the water discharge nozzle, and then opens the fire hydrant valve open/close lever 36 . At this time, the pulley 100 is rotated via the second two-way clutch 104 by the opening operation of the fire hydrant valve open/close lever 36, the pulley 98 is interlocked and rotated via 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 two-way clutch 102, the rotation is not transmitted to the input shaft 102a, and the electric actuator 60 idles. The operation of the valve opening/closing lever 36 is not affected, and the fire hydrant valve 46 can be opened/closed by operating the fire hydrant opening/closing lever 36 in the same manner as when the electric actuator 60 is not provided.

When the fire hydrant device 10 is to be inspected with the fire hydrant door open, the fire hydrant valve open/close lever 36 may be moved by the opening/closing drive of the electric actuator 60. Therefore, the second two-way clutch 104 is provided. No need.

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

The open/close detector 70 performs open/close detection of the fire hydrant valve 46 during 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 fire hydrant valve open/close lever 36 side. The remote opening and closing function can be detected together.

In addition, the motor-driven electric actuator 60 has a built-in torque limiter, and when the driving torque for the fire hydrant valve 46 exceeds a predetermined value, the torque torque limiter operates to release the driving force, preventing damage due to overheating of the motor. can be prevented. When the torque limiter of the electric actuator 60 is actuated, for example, the limiter pin protrudes, and this is detected by the torque limiter actuation sensor 61 .

[Water discharge operation of fire hydrant system]
FIG. 6 is an explanatory diagram showing the operation when the fire hydrant valve open/close lever is operated to open during a fire. When a fire occurs in a tunnel due to a vehicle accident or the like, a 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. 14 is taken out, the hose 38 is pulled out, and then the fire hydrant valve open/close lever 36 is operated to the open position on the near side.

As shown in FIG. 6, when the fire hydrant valve opening/closing lever 36 is operated to the open position, the pulley 100 is rotated via the second two-way clutch 104, and the pulley 98 is interlocked and rotated via the link wire 101. The fire hydrant valve 46 is driven to open. At this time, since the two-way clutch 102 receives rotational input from the output shaft 102b side, 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, due to the rotation of the pulley 98, the open/close detector 70 detects the opening of the fire hydrant valve 46, and based on this, a pump start signal is sent to the disaster prevention receiver side, the operation of the fire pump equipment is started, and pressurization is performed. Continuous supply of fire-fighting water is started.

When the fire hydrant valve 46 is opened, the fire extinguishing water is supplied to the inspection switching valve 50 through the automatic pressure regulating valve 48, and at this time, the inspection switching valve 50 is pressed by the spring 96 of the piston 90 to move the valve body 82 to the second position. The water discharge switching position is held in contact with the valve seat 88 to close the drain port 80, and the fire extinguishing water flows from the valve hole 84 in the open state to the outflow port 78, and is supplied from the pipe 47 to the hose side. Water is discharged from the water discharge nozzle.

When the fire is extinguished and water discharge is stopped, the fire hydrant valve opening/closing lever 36 is returned to the original closed position, and the fire 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 diagram showing the operation during automatic inspection. In the automatic inspection of the fire hydrant devices 10, when an inspection start operation is performed on the disaster prevention receiving panel side, inspection of a plurality of fire hydrant devices 10 is sequentially performed by transmitting an inspection instruction signal.

When the inspection control unit 75 shown in FIG. 4 receives an inspection instruction signal from the disaster prevention receiving panel, as shown in FIG. Fire-fighting water is supplied to chamber 94 .

When the fire extinguishing water is supplied to the cylinder chamber 94, the piston 90 moves while compressing the spring 96, moves the valve body 82 away from the second valve seat 88, opens the drain port 80, and moves the distance X. Then, by abutting against the first valve seat 85 and closing 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 drainage switching position.

When the inspection switching valve 50 is switched to the drainage switching position, the second strain sensor 66 is pressed by the movement of the distance X of the piston 90, and a strain detection signal indicating the drainage switching position is sent to the inspection control unit 75 in FIG. The inspection control unit 75 determines that the inspection switching valve 50 has normally switched to the drainage switching position, and then drives the electric actuator 60 to open the fire hydrant valve 46 to open the two-way clutch 102. and the pulley 98 to open the fire hydrant valve 46 .

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 through the automatic pressure regulating valve 48, and at this time, the inspection switching valve 50 is switched to the drainage 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 discharges an amount of water corresponding to the actual water discharge from the water discharge nozzle 40 of the hose 38 for inspection.

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 shown in FIG. Compare with the set pressure of 0.29 MPa, and if it is within the specified error range against the set pressure, it will be determined as normal. A fault alarm indicating the deviation is output, and the set pressure of the automatic pressure regulating valve 48 is readjusted after the inspection is completed.

In addition, when the set pressure is significantly lower or, conversely, when the set pressure is significantly higher, it is determined that the automatic pressure regulating valve 48 has failed, and a failure alarm is output from the disaster prevention receiving panel. I will let you.

During the inspection, the fire extinguishing water supplied to the cylinder chamber 94 of the inspection switching valve 50 flows to the drainage side through the orifice 54 and the check valve 56, but the amount of drainage is limited by the orifice 54, and the pilot The amount of fire extinguishing water supplied from the pipe 53 sufficiently exceeds the amount of water discharged, so that the water pressure in the cylinder chamber 94 is maintained, and the piston 90 can hold the valve body 82 at the discharge switching position.

When pressure determination by the pressure sensor 68 is completed, inspection restoration control is performed as an end of inspection. The inspection and recovery control may be performed according to an instruction from the disaster prevention receiving panel, or may be performed automatically as a control procedure of the inspection control section 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 close. 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, the open/close detector 70 is detected to be closed, so the inspection control unit 75 subsequently controls the pilot motor operated valve 52 to close 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 is stopped, and the fire-extinguishing water in the cylinder chamber 94 is throttled by the orifice 54 and passed through the check valve 56 at a predetermined amount. As the pressure in the cylinder chamber 94 decreases, the piston 90 is pushed by the spring 96 to move, and the valve body 82 comes into contact with the second valve seat 88 to switch to the water discharge switching position where the drain port 80 is closed. .

In this way, when the inspection switching valve 50 is slowly switched from the drainage switching position to the water discharge switching position in a state where the supply of fire extinguishing water from the primary side is stopped, the outflow port 78 and the drain port 80 are in communication via the valve hole 84, and the outflow port 78 is open to the atmosphere via the hose 38. The fire-fighting water remaining between the pipes is discharged from the drain hose 58 and does not remain in the pipe.

When the inspection switching valve 50 is switched to the water discharge switching position, the strain detection signal indicating detection of the water discharge switching position is output from the first strain sensor 64 that receives the pressure of the piston 90. Knowing the recovery of the switching valve 50, it determines the end of the inspection, notifies the disaster prevention receiving panel of the end of the inspection, and causes the next fire hydrant device to be inspected.

Moreover, the inspection of the fire hydrant device 10 can also be performed at the installation location of the fire hydrant device 10 by operating the manual inspection switch 74 shown in FIG.

[Inspection control of fire hydrant equipment]
FIG. 8 is a flow chart showing inspection control of the fire hydrant device inspection system, which is a control operation by the inspection control unit 75 shown in FIG.

As shown in FIG. 8, when the inspection control unit 75 determines reception of an inspection instruction signal from the disaster prevention receiving panel in step S1, the process proceeds to step S2, where it controls the opening of the pilot motor-operated valve 52, and 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 drainage switching position shown in FIG.

Subsequently, when the inspection control unit 75 determines detection of the drainage switching position from the strain detection signal of the second strain sensor in step S3, the process proceeds to step S4, and controls the electric actuator 60 to open, thereby driving the fire hydrant valve 46 to open. Then, fire-fighting water is supplied to the inspection switching valve 50 through the automatic pressure regulating valve 48, and an inspection water discharge state is established in which fire-fighting water flows through the drainage hose 58 through the inspection switching valve 50 switched to the drainage 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 normality is determined in step S6, a drainage pressure normal signal is sent to the disaster prevention receiver 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 receiving panel in step S8.

Subsequently, when the inspection control unit 75 determines that an inspection end signal has been received from the disaster prevention receiving panel in step S9, the process proceeds to step S10, where the electric actuator 60 is controlled to close to close the fire hydrant valve 46, and the inspection switching valve 50 is passed through. Then, in step S11, the pilot electric valve 52 is controlled to be closed to drive the inspection switching valve 50 to the water discharge switching position, and in step S12, the strain detection signal of the first strain sensor 64 is detected. When it is determined that the water discharge switching position has been detected by , the process proceeds to step S13, an inspection end signal is transmitted to the disaster prevention receiving panel, and a series of inspection control is completed.

[Opening and closing 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 opens and closes a fire hydrant valve by a hydraulic actuator.

In the embodiment of FIG. 5, the electric actuator 60 is provided to drive the fire hydrant valve 46 to open and close, but in this embodiment, as shown in FIG. 110 is provided.

The hydraulic actuator 110 is composed of a hydraulic drive mechanism 110 functioning as a second drive mechanism and a rack and pinion mechanism. The hydraulic drive mechanism 110 has a piston 116 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 the pilot pipe 128 is provided with a second pilot electric valve 130 . Also, the cylinder chamber 114 is connected to the drain side through an orifice 115 .

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

A rotating shaft of the pinion gear 124 is connected to a 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 of 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.

Since other configurations and functions are the same as those of the embodiment of FIG.

In this embodiment, when the inspection switching valve 50 is switched to the drainage switching position by the open control of the pilot electric valve 52 during inspection of the fire hydrant device 10, the second pilot of the hydraulic actuator 110 is operated. The electric valve 130 is controlled to open.

When the second pilot motor operated valve 130 is controlled to open, 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 linear movement of the rack gear 122 causes the pinion gear 114 to move. to open the fire 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, and inspection water discharge is performed by flowing fire extinguishing water to the drain hose 58, and the pressure sensor 68 measures the drain pressure. is determined by

During inspection, the fire-extinguishing water supplied to the cylinder chamber 114 of the hydraulic drive mechanism 110 flows through the orifice 115 to the drainage side, but the amount of drainage is limited by the orifice 115, and the fire-extinguishing water from the pilot pipe 128 is sufficiently above the displacement to maintain the water pressure in the cylinder chamber 114, allowing the piston 116 to hold the fire hydrant valve 46 in the open position via the rack and pinion mechanism.

When the inspection water discharge for measuring the drainage pressure is completed, first, the second pilot motor operated valve 130 is controlled to be closed, the supply of fire-fighting water to the cylinder chamber 114 of the hydraulic drive mechanism 112 is stopped, and the fire-fighting water in the cylinder chamber 114 is discharged from the orifice. Draining via 115 reduces pressure, spring 118 pushes piston 116 back to its initial position, rack gear 122 rotates pinion gear 124 in the opposite direction, and fire hydrant valve 46 is engaged via two-way clutch 126. Close driven to close.

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

In the hydraulic actuator 110 of this 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. 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 reducing the size of the cable laid in the tunnel. can be reduced, the capacity of the emergency power supply can be reduced, and 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 device inspection system, the inspection switching valve 50 can generally be used as a three-way switching valve.

When the inspection switching valve 50 is a general three-way switching valve, as shown in FIG. port 80 serves as a second outflow port 80), and movement of the valve body 82 by the piston-cylinder mechanism communicates the inflow port 76 with the first outflow port 78, and connects the inflow port 76 and the second outflow port. and a second switching position that disconnects the inlet 76 and the first outlet 78 and communicates the inlet 76 with the second outlet 80 .

The interior of the valve body 51 is partitioned by a partition wall 83 into an inflow chamber having an inflow port 76 and an outflow chamber having a first outflow port 78 . A first valve seat 85 is formed on the side of the body, a second outlet 80 is coaxially formed in the outer shell of the body facing the valve hole 84 , and a first outlet 80 is formed on the inlet chamber side of the second outlet 80 . A second valve seat 88 is formed opposite to the valve seat 85 of the second valve seat 85, and a valve body 82 axially moved by a piston-cylinder mechanism is arranged 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 the first switching position where the valve body 82 is brought into contact with the second valve seat 88 by the spring 96 . It is configured to move the piston 90 to the second switching position where the piston 90 is brought into contact with the first valve seat 85 by supplying fire extinguishing water.

With such a configuration, a function as a three-way switching valve that selectively switches between the first or second outlets 78 and 80 with respect to the inlet 76 is realized by the linear movement of the valve body 82 driven by the hydraulic pressure of the piston/cylinder mechanism. The switching operation of the three-way switching valve can be done by supplying fire extinguishing water with a small pilot motor operated valve installed in a small diameter pilot pipe, so it is possible to reduce power consumption, reduce cable size, reduce power supply capacity, etc. It is possible to reduce costs accordingly.

In addition, compared to the conventional three-way electric switching valve that rotates the valve body, the valve body 82 is brought into contact with the first or second valve seats 85 and 88, so the conventional three-way electric switching valve that rotates the valve body is improved. It is possible to selectively switch the inflow port 76 to the first outflow port 78 or the second outflow port 80 without such water leakage.

The inspection switching valve 50, which functions as a three-way switching valve, normally maintains the valve body 82 in the first switching position by the force of the spring 96 and communicates with the first outflow port 78 side and the second switching valve. The outflow port 80 side is fully closed, and a high fail-safe function is obtained by maintaining the first switching position regardless of loss of power.

[Modification of the present invention]
(Monitoring of valve body and valve seat)
In the above embodiment, various sensors are used to detect the opening and closing of the valve. Further, a strain sensor and a contact sensor are embedded in the valve body and valve seat seal so that the seating state of the valve body can be monitored. You can do it. As a result, it is possible to detect clogging of the valve body with dust and detect abnormalities in the operation of the valve body as soon as possible, thereby preventing failures and performing 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 magnetostrictive power generation element is placed at a position where vibration is generated by water flow, and it is used as a sensor power supply. You can This eliminates the need for an external sensor power supply, which reduces costs and simplifies the system.

For example, the spring 96 provided in the inspection switching valve 50 is coated with a piezoelectric power generation element to form a sensor power source. Specifically, a lower electrode layer, a piezoelectric layer, and an upper electrode layer are laminated on the surface of the spring 96, and a pair of lead wires are led out from the lower electrode layer and the upper electrode layer.

Its manufacturing method is to apply silver paste on the surface of a metal spring 96 to form a lower electrode layer, spray-coat a piezoelectric solvent on the surface, and then hot-air dry to produce a film, and then applying a predetermined high voltage from a corona electrode spaced a predetermined distance from the surface of the film for a predetermined period of time to polarize the piezoelectric layer to form a piezoelectric layer; applying silver paste on the upper surface of the piezoelectric layer to form an upper electrode layer; Finally, lead wires are adhered to the upper electrode layer and the lower electrode layer using a conductive adhesive. As a result, the piezoelectric power generation element can be simply and easily provided on the spring 96, and the function of the spring 96 is not impaired even when the piezoelectric power generation element is provided.

(others)
In the above-described embodiment, the automatic pressure regulating valve 48 is provided upstream of the inspection switching valve 50, but instead of the automatic pressure regulating valve 48, a water flow controller such as a constant flow valve may be provided. 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 controller is correct.

Also, in the above embodiment, a strain sensor is used as a position detector, but an appropriate method such as a combination of physical switches may be used. For example, the piston rod 92 is extended to pass through 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, and a water discharge switch. A drain switching position detection switch is provided that contacts the switch pressing portion in the switching position. By adopting 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.

Moreover, the present invention includes appropriate modifications that do not impair its purpose and advantages, and is not limited by the numerical values shown in the above embodiments.

10: Fire hydrant device 12: Device body 14: Fire hydrant door 15: Maintenance door 16: Door handle 18: Reporting device door 20: Push button reporting device 22: Red indicator light 24: Speaker 25: Hinge 26: Fire extinguisher door 28: Fire extinguisher 30: Fire extinguishing 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: Rising pipes 45, 47: Piping 46: Fire hydrant valve 48: Automatic adjustment Pressure valve 50: Inspection switching valve 51: Valve body 52: Pilot electric valves 53, 128: Pilot piping 54: Orifice 56: Check valve 58: Drain hose 60: Electric actuator 61: Torque limiter actuation 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 : Manual inspection switch 75 : Inspection control section 76 : Inlet 78 : Outlet 80 : Drain 82 : Valve body 83: Partition wall 84: Valve hole 86: First valve seat 88: Second valve seat 90: Piston 92: Piston rod 94: Cylinder chamber 96: Springs 98, 100: Pulley 101: Link wires 102, 104 , 126: two-way 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 (2)

A fire hydrant device inspection system for performing a functional check of a fire hydrant device that discharges water from a hose ,
A fire hydrant valve provided in a pipe leading to the hose and opened and closed by operating a fire hydrant valve opening and closing lever via a remote control mechanism;
A water discharge switching position that is provided following the fire hydrant valve and that communicates the inflow port and the outflow port and disconnects the inflow port and the drain port by movement of a valve body by a drive mechanism in which a piston is provided in a cylinder chamber; an inspection switching valve that disconnects the inlet and the outlet and switches to a drainage switching position that communicates the inlet and the outlet;
a pilot motor-operated 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 the fire hydrant valve via the remote control mechanism ;
a switching position detector that detects the water discharge switching position or the drainage switching position of the inspection switching valve;
When inspection is started, the pilot motor operated valve is controlled to open to switch the inspection switching valve to the drainage switching position, and when the switching position detector detects the drainage switching position, the fire hydrant valve is controlled by the actuator. an inspection control unit that drives the open drive to flow fire extinguishing water to the drainage side through the inspection switching valve for inspection;
A fire hydrant device inspection system characterized by being provided with.
In the fire hydrant device inspection system according to claim 1,
A clutch mechanism is provided between the remote control mechanism and the fire hydrant valve, between the remote control mechanism and the fire hydrant valve opening/closing lever, or between the remote control mechanism and the fire hydrant valve. Fire hydrant equipment inspection system.

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