JP6963394B2 - Fire hydrant equipment and fire hydrant equipment in the tunnel - Google Patents

Description

The present invention relates to an in-tunnel fire hydrant facility and a fire hydrant device that raises a hose storage portion to enable hose removal.

Conventionally, a fire hydrant device has been provided as a tunnel emergency equipment installed in a tunnel such as a highway or a motorway, and the fire hydrant device is a fire extinguisher storage part of a housing equipped with an openable fire hydrant door and a nozzle at the tip. For example, two fire extinguishers are stored in a fire extinguisher storage unit equipped with a fire extinguisher door that can be opened and closed.

Such fire hydrant devices are installed, for example, at intervals of 50 meters along the side wall facing the observer passage provided in the tunnel. The observer passage is provided as a side wall passage that is about 1 meter higher than the road surface, and it is possible to safely inspect various equipment including the fire hydrant device installed in the tunnel without obstructing the passage of vehicles in the tunnel. It is said.

In the event of a vehicle accident involving a fire, users such as the driver of the accident vehicle open the fire hydrant door of the fire hydrant device, pull out the hose with a nozzle, and operate the fire hydrant valve open / close lever to operate the fire hydrant valve equipment. Fire extinguishing work can be performed by starting up and discharging water.

Japanese Unexamined Patent Publication No. 2008-055024 Japanese Unexamined Patent Publication No. 2009-285126

However, in such a conventional fire hydrant device installed in a tunnel, since it is installed along the side wall of the tunnel facing the observer passage, the user can observe from the road surface when a fire occurs due to a vehicle accident. It is necessary to reach for the fire hydrant device installed on the side wall of the tunnel beyond the passage, open the fire hydrant door, pull out the hose to extinguish the fire, and the fire hydrant device is installed at a high position away from the road surface. Depending on the person, it may be necessary to go up to the observer passage and operate it, and some observer passages are provided with handrails, which interfere with fire extinguishing work and are difficult to handle. There was a case.

In order to solve this problem, the applicant of the present application proposes an elevating type fire hydrant facility that can be easily and easily handled from the road side and the observer passage side. In the elevating type fire hydrant equipment, the hose storage part where the hose with a nozzle is stored is arranged in the observer passage so that it can be elevated by the elevating mechanism, and in the event of a vehicle accident involving fire in the tunnel, a predetermined switch When the operation is performed, the hose storage part is raised and held at the exposed position on the observer passage by the operation of the elevating mechanism, and the hose storage part exposed on the observer passage does not require the opening operation of the fire hydrant door. The hose with a nozzle can be pulled out easily and easily to extinguish the fire.

By the way, in such an elevating type fire hydrant facility, an elevating control circuit for elevating and lowering the hose storage portion by driving an actuator provided in the elevating mechanism by hydraulic pressure or hydraulic pressure is important, and the hose is moved up and down by a hydraulic actuator. The load hose compartment weighs more than 100 kilograms, and when using a fire hydrant, it is necessary to raise it to expose it on the observer passage and prevent it from falling to maintain this exposed state. Further, when the hose storage portion is stored in the observer passage, it is necessary to smoothly lower the hose storage portion without causing runaway or impact.

An object of the present invention is to provide an in-tunnel fire hydrant facility and a fire hydrant device provided with an elevating control circuit for reliably operating an elevating type fire hydrant device that raises a hose storage portion to enable hose removal.

(Fire hydrant equipment and fire hydrant equipment in the tunnel)
The present invention includes a hose receiving portion for accommodating a hose with a nozzle, an elevating mechanism for elevating the hose storage unit, fire hydrant apparatus comprising a lifting control circuit for controlling the lifting mechanism, and the fire hydrant apparatus does not use fire hydrant In the case where the hose storage is housed in the observer passage in the tunnel, and when a fire hydrant is used, the hose storage is raised and held in the exposed position on the road surface of the observer passage . In fire hydrant equipment
The elevating mechanism is equipped with a hydraulic actuator that elevates and lowers the hose housing.
Elevation control circuit, when using the fire hydrant, when controlling the hydraulic pressure for the hydraulic actuator to raise the hose housing section to the exposed position, for accommodating a fire hydrant in wardens passage, housing a hose housing section Control the hydraulic pressure on the hydraulic actuator to lower it to position,
It is characterized by that.

(Hydraulic lift control circuit)
The hydraulic actuator is a double-acting cylinder that slides the piston in both directions by switching between the supply of pressure water from the hydraulic source to the ascending cylinder chamber and the descending cylinder chamber and the discharge of pressure water to the drain side.
The elevating control circuit includes a first three-way switching valve and a second three-way switching valve.
The first three-way switching valve can switch between two positions, an ascending position and a descending position, and supplies pressure water to the ascending cylinder chamber of the double-acting cylinder at the ascending position and pressure water in the ascending cylinder chamber at the descending position. To discharge
The second three-way switching valve can switch between two positions, an ascending position and a descending position. At the ascending position, the pressure water in the lowering cylinder chamber of the double-acting cylinder is discharged, and at the descending position, the pressure water is discharged into the lowering cylinder chamber. Supply.

(Constant flow rate valve, flow rate control valve, check valve equipped with hydraulic lift control circuit)
The lift control circuit is further
The primary side piping to which the pressure water from the water pressure source is supplied to the first three-way switching valve and the second three-way switching valve is provided with a constant flow rate valve or an automatic pressure regulating valve that supplies a predetermined constant flow rate.
From the first three-way switching valve to the cylinder chamber for raising the double-acting cylinder and from the second three-way switching valve to the lowering cylinder chamber of the double-acting cylinder, each of the secondary pipes is connected to the double-acting cylinder side. parallel with the flow control valve for adjusting a check valve to prevent the return of pressure water from the double acting cylinder side as well as allows the supply of pressurized water, the flow rate of the pressurized water to be discharged to the discharge side of double acting cylinder-side It provided with a circuit.

(Flood control circuit)
The hydraulic actuator is a double-acting cylinder that slides the piston in both directions by switching between the supply of pressure oil from the hydraulic source and the discharge of pressure oil to the tank side to the ascending cylinder chamber and the descending cylinder chamber.
Elevation control circuit comprises a directional control valve,
The directional control valve can be switched between the ascending position, the neutral position, and the descending position, and the hydraulic pressure is adjusted so that the pressure oil cannot be supplied and discharged to the ascending cylinder chamber and the descending cylinder chamber of the double-acting cylinder at the neutral position. disconnected from the source and the tank side, raised position to discharge the pressure oil Rutotomoni lowering cylinder chamber to supply pressurized oil to the elevating cylinder chamber of double acting cylinder, the pressure lowering cylinder chamber of the double acting cylinder in the lowered position oil to discharge the pressurized oil Rutotomoni rising cylinder chamber to supply.

(Check valve, relief valve, flow control valve equipped with hydraulic lift control circuit )
The lift control circuit is further
A check valve is provided on the primary side piping where the pressure oil from the hydraulic source is supplied to the directional control valve to prevent the backflow of the pressure oil to the hydraulic source.
Between the primary side of the check valve from the directional control valve side of the pipe the pipe portion and the directional control valve between the tank return pipe being connected to the tank side, the hydraulic fluid supplied from the hydraulic source to the directional control valve Equipped with a relief valve that controls to a predetermined pressure
Allows the supply of pressure oil to the double-acting cylinder side and allows the supply of pressure oil from the double-acting cylinder side to each of the secondary side pipes connected from the directional control valve to the ascending cylinder chamber and the descending cylinder chamber of the double-acting cylinder. It is equipped with a check valve that blocks the discharge of pressure oil and a parallel circuit of a flow control valve that adjusts the flow rate of pressure oil discharged from the double-acting cylinder side to the tank side.

(Flood control lift control circuit with counter balance valve)
The hydraulic actuator is a double-acting cylinder that slides the piston in both directions by switching between the supply of pressure oil from the hydraulic source and the discharge of pressure oil to the tank side to the ascending cylinder chamber and the descending cylinder chamber.
Elevation control circuit comprises a directional control valve,
The directional control valve can be switched between the ascending position, the neutral position, and the descending position, and the pressure oil cannot be supplied from the hydraulic source to the ascending cylinder chamber and the descending cylinder chamber of the double-acting cylinder at the neutral position. communicated with the tank side elevation cylinder chamber and lowering cylinder chamber with disconnected, the pressure oil to increase cylinder chamber of the double acting cylinder is discharged pressure oil Rutotomoni lowering cylinder chamber to supply in the raised position, the lowered position in drained pressure oil Rutotomoni rising cylinder chamber to supply pressurized oil to the lowering cylinder chamber of double acting cylinder,
In addition
A counter balance that is released when the pressure oil discharged from the ascending cylinder chamber side to the tank side exceeds a predetermined pressure in the secondary side piping that is connected from the directional control valve to the ascending cylinder chamber of the double-acting cylinder. With a valve
Connected in series with the counter balance valve , it prevents oil from leaking from the counter balance valve to the tank side in the neutral position, and is released when the pressure oil discharged from the rising cylinder chamber side to the tank side exceeds the specified pressure. Pilot check valve and
To be equipped .

(Check valve, relief valve, flow control valve provided in the lift control circuit with counter balance valve)
The lift control circuit is further
A check valve is provided on the primary side piping where the pressure oil from the hydraulic source is supplied to the directional control valve to prevent the backflow of the pressure oil to the hydraulic source.
Between the primary side of the check valve from the directional control valve side of the pipe the pipe portion and the directional control valve between the tank return pipe being connected to the tank side, the hydraulic fluid supplied from the hydraulic source to the directional control valve Equipped with a relief valve that controls to a predetermined pressure
Allows the supply of pressure oil to the double-acting cylinder side and allows the supply of pressure oil from the double-acting cylinder side to each of the secondary side pipes connected from the directional control valve to the ascending cylinder chamber and the descending cylinder chamber of the double-acting cylinder. It is equipped with a check valve that blocks the discharge of pressure oil and a parallel circuit of a flow control valve that adjusts the flow rate of pressure oil returning from the double-acting cylinder side to the tank side.

(Flood control lift control circuit with three-way switching valve)
The hydraulic actuator is a double-acting cylinder that slides the piston in both directions by switching between the supply of pressure oil from the hydraulic source and the discharge of pressure oil to the tank side to the ascending cylinder chamber and the descending cylinder chamber.
The elevating control circuit includes a first three-way switching valve and a second three-way switching valve.
The first three-way switching valve can switch between two positions, an ascending position and a descending position, and supplies pressure oil to the ascending cylinder chamber of the double-acting cylinder at the ascending position and pressure oil in the ascending cylinder chamber at the descending position. To discharge,
The second three-way switching valve can switch between two positions, an ascending position and a descending position. At the ascending position, the pressure oil in the lowering cylinder chamber of the double-acting cylinder is discharged, and at the lowering position, the pressure oil is discharged into the lowering cylinder chamber. you supply.

(Check valve, relief valve, flow rate control valve provided in the lift control circuit equipped with a three-way switching valve)
The lift control circuit is further
The primary side of the piping pressure oil is supplied from the hydraulic source to the first three-way valve and the second three-way valve, comprising a check valve for preventing backflow of the pressurized oil to the hydraulic source,
Tank return connected from the check valve of the primary side pipe to the piping part on the side of the first three-way switching valve and the second three-way switching valve, the first three-way switching valve, and the second three-way switching valve to the tank side. between the use pipes, comprising a relief valve for controlling the hydraulic fluid supplied from the hydraulic source to the first three-way valve and the second three-way valve to a predetermined pressure,
From the first three-way switching valve to the cylinder chamber for raising the double-acting cylinder and from the second three-way switching valve to the lowering cylinder chamber of the double-acting cylinder, each of the pipes on the secondary side is connected to the double-acting cylinder side. parallel with the flow control valve for adjusting a check valve to prevent discharge of pressurized oil from the double acting cylinder side as well as allows the supply of the hydraulic fluid, the flow rate of the hydraulic fluid discharged from the double-acting cylinder side to the tank side It provided with a circuit.

(Elevation control circuit that hydraulically drives a single-acting cylinder)
Hydraulic actuator, the piston is toward selfish slide on one side by the supply of pressure oil from the hydraulic source to the cylinder chamber, the more piston spring on the other side in a state of being discharged from the cylinder chamber pressure oil to the tank side a single acting cylinder for countercurrent selfish slide,
The lift control circuit is equipped with a three-way switching valve.
The three-way switching valve can switch between two positions, an ascending position and a descending position. At the ascending position , pressure oil is supplied to the cylinder chamber of the single-acting cylinder, and at the descending position , pressure oil is discharged from the cylinder chamber.

(Check valve and flow control valve provided in the lift control circuit that hydraulically drives the single-acting cylinder)
The lift control circuit is further
The primary side of the piping pressure oil is supplied from the hydraulic source to the three-way valve, comprising a check valve for preventing backflow of the pressurized oil to the hydraulic source,
Between the pipe portion than the check valve of the primary pipe three-way valve side and the three-way switching valve and the tank return pipe being connected to the tank side, the hydraulic fluid supplied from the hydraulic source to the three-way valve Equipped with a relief valve that controls to a predetermined pressure
The piping section on the three-way switching valve side from the check valve on the primary side is equipped with a first flow control valve that can adjust the flow rate of the pressure oil supplied from the flood control source to the single-acting cylinder side.
The tank return pipe is provided with a second flow rate control valve capable of adjusting the flow rate of the pressure oil discharged from the single-acting cylinder side to the tank side.

(Pilot check valve and flow control valve provided in the lift control circuit that hydraulically drives the single-acting cylinder)
The lift control circuit is further
Adjusts the flow rate of pressure oil flowing to the tank side through the pilot check valve, which opens when the oil pressure on the single-acting cylinder side exceeds a predetermined pressure, and the pilot check valve, which communicates from the cylinder chamber to the tank side. A series circuit with a flow control valve is provided.

(Flood control lift control circuit with four-way switching valve)
The hydraulic actuator is a double-acting cylinder that slides the piston in both directions by switching between the supply of pressure oil from the hydraulic source and the discharge of pressure oil to the tank side to the ascending cylinder chamber and the descending cylinder chamber.
Elevation control circuit includes a four-way switching valve,
The four-way switching valve can switch between two positions, an ascending position and a descending position. At the ascending position, pressure oil is supplied to the ascending cylinder chamber of the double-acting cylinder and the pressure oil in the descending cylinder chamber is discharged, so that the descending position The ascending cylinder chamber and the descending cylinder chamber are communicated with each other, and the piston is lowered by the load pressure due to the weight of the hose storage portion.

(Check valve, relief valve, flow rate control valve provided in the lift control circuit equipped with a four-way switching valve)
The lift control circuit is further
The primary side of the piping pressure oil is supplied from the hydraulic source to the four-way switching valve, comprising a check valve for preventing backflow of the pressurized oil to the hydraulic source,
Between the primary side than the check valve of the piping of the four-way switching valve side piping section and the four-way switching valve with the tank return pipe being connected to the tank side, the hydraulic fluid supplied from the hydraulic source to the four-way switching valve Equipped with a relief valve that controls to a predetermined pressure
Allows the supply of pressure oil to the double-acting cylinder side and allows the supply of pressure oil from the double-acting cylinder side to each of the secondary side pipes connected from the four-way switching valve to the ascending cylinder chamber and the descending cylinder chamber of the double-acting cylinder. It is provided with a parallel circuit of a check valve for blocking the discharge of pressure oil and a flow control valve for adjusting the flow rate of the pressure oil discharged from the double-acting cylinder side to the tank side.

(Raising and lowering drive by gas pressure)
Another is in the form, fire hydrant apparatus comprising a hose housing section housing a hose with a nozzle, an elevating mechanism for elevating the hose housing portion, and a lift control circuit for controlling the lifting mechanism of the present invention, and the When the fire hydrant device does not use a fire hydrant, the hose compartment is housed in the observer passage in the tunnel, and when using a fire hydrant, the hose compartment is raised and held in an exposed position on the road surface of the observer passage. In the fire hydrant equipment in the tunnel installed in
The elevating mechanism is equipped with a gas pressure actuator that elevates and lowers the hose housing.
Elevation control circuit, when using the fire hydrant, when controlling the gas pressure to gas pressure actuator to raise the hose housing section to the exposed position, for accommodating a fire hydrant in wardens passage, housing a hose housing section Control the gas pressure on the gas pressure actuator to lower it to position,
It is characterized by that.

(Basic effect)
The present invention includes a hose receiving portion for accommodating a hose with a nozzle, an elevating mechanism for elevating the hose storage unit, fire hydrant apparatus comprising a lifting control circuit for controlling the lifting mechanism, and the fire hydrant apparatus does not use fire hydrant In the case where the hose storage is housed in the observer passage in the tunnel, and when a fire hydrant is used, the hose storage is raised and held in an exposed position on the road surface of the observer passage . In the fire hydrant equipment, the elevating mechanism is provided with a hydraulic actuator that raises and lowers the hose storage part, and the elevating control circuit is a liquid for the hydraulic actuator so as to raise the hose storage part to the exposed position when using the fire hydrant. controls pressure, in the case of housing the fire hydrants to the wardens passage, for controlling the hydraulic against hydraulic actuator so as to lower the hose storage unit in the storage position, in the event of a vehicle accident involving fire in tunnel When the specified switch is operated, the hose storage part housed in the observer passage is pushed up by the operation of the elevating mechanism by the elevating control circuit and exposed on the road surface of the observer passage, and the fire hydrant door is opened. The fire can be extinguished by easily and easily pulling out the hose with a nozzle from the hose storage portion exposed on the observer passage without the need for it.

(Effect of lifting the control circuit of the hydraulic)
The hydraulic actuator is a double-acting cylinder that slides the piston in both directions by switching between the supply of pressure water from the hydraulic source to the ascending cylinder chamber and the descending cylinder chamber and the discharge of pressure water to the drain side. Yes, the elevating control circuit is equipped with a first three-way switching valve and a second three-way switching valve, and the first three-way switching valve can switch between two positions, an ascending position and a descending position, and double-acts at the ascending position. Pressure water is supplied to the cylinder chamber for ascending the cylinder, and the pressure water in the cylinder chamber for ascending is discharged at the descending position. The pressure water in the lowering cylinder chamber of the double-acting cylinder is discharged at the position, and the pressure water is supplied to the lowering cylinder chamber at the lowering position. By operating the double-acting cylinder used, the hose storage part stored inside the observer passage can be pushed up from the fire extinguishing plug elevating port on the road surface to expose it on the road surface, and it is necessary to newly provide a drive source for the elevating mechanism. This makes it possible to simplify the equipment configuration and reduce the equipment cost.

(Effects of constant flow rate valve, flow rate control valve, and check valve provided in the hydraulic lift control circuit)
Further, the lift control circuit further includes a first primary side of the pipe pressure water is supplied from the hydraulic pressure source to the three-way switching valve and the second three-way valve, constant flow valve for supplying a predetermined constant flow rate Alternatively, each of the secondary side pipes provided with an automatic pressure regulating valve and connected from the first three-way switching valve to the ascending cylinder chamber of the double-acting cylinder and from the second three-way switching valve to the descending cylinder chamber of the double-acting cylinder. , adjustment and check valve to prevent the return of pressure water from the double acting cylinder side as well as allows the supply of pressurized water, the flow rate of the pressurized water to be discharged to the discharge side of double acting cylinder side to the double acting cylinder side Since it is equipped with a parallel circuit with the flow control valve, the pressure water supplied to the double-acting cylinder side by the constant flow valve or the automatic pressure regulating valve does not exceed a constant flow rate regardless of the pressure, so that the double-acting cylinder moves. Even if the water pressure on the water supply main side drops sharply, the check valve provided on the primary side pipe suppresses the effect of the pressure drop on the cylinder side. Further, the check valve provided on each of the secondary side pipes connected to the double-acting cylinder from the first three-way switching valve and the second three-way switching valve allows the pressure on the hydraulic source side with respect to the pressure on the cylinder side. The movement speed of the piston is suppressed by suppressing the return of the piston in the opposite direction when the pressure drops, and by making the flow rate of the pressure water discharged from the cylinder side constant by the flow control valve provided in the parallel circuit. Can be kept constant.

(Effect of hydraulic lift control circuit)
The hydraulic actuator is a double-acting cylinder that slides the piston in both directions by switching between the supply of pressure oil from the flood control source and the discharge of pressure oil to the tank side to the ascending cylinder chamber and the descending cylinder chamber. There, the lifting control circuit comprises a directional control valve, the directional control valve is a raised position, it is possible to switch three positions of the neutral position and a lowered position, raising the cylinder chamber and lowering cylinder double-acting cylinder in the neutral position disconnected from the hydraulic source and the tank side so as not to supply and discharge of pressure oil for the chamber, the pressure oil to increase cylinder chamber of the double acting cylinder is discharged pressure oil Rutotomoni lowering cylinder chamber to supply in the raised position, due to so as to discharge the pressurized oil lowering Rutotomoni elevating cylinder chamber to supply pressurized oil to the cylinder chamber of the double acting cylinder in the lowered position, by utilizing the hydraulic pressure from the hydraulic source with a hydraulic pump directional control valve By operating the double-acting cylinder, the hose storage part stored inside the observer passage can be pushed up from the fire extinguishing plug elevating port on the road surface to expose it on the road surface, and a flood pressure sufficiently high for hydraulic drive is used. As a result, equipment such as double-acting cylinders and valves used in the lift control circuit can be miniaturized, and the installation space can be reduced.

(Effects of check valves, relief valves, and flow control valves equipped with hydraulic lift control circuits)
In addition, the elevating control circuit is further equipped with a check valve on the primary side pipe where the pressure oil from the flood control source is supplied to the directional control valve to prevent the backflow of the pressure oil to the flood control source on the primary side. between the directional control valve side of the check valve of the piping pipe portion and the directional control valve between the tank return pipe being connected to the tank side, the hydraulic fluid supplied from the hydraulic source to a predetermined pressure in the direction control valve It is equipped with a relief valve to control, and allows flood control to be supplied to the double-acting cylinder side to each of the secondary side pipes connected from the directional control valve to the ascending cylinder chamber and the descending cylinder chamber of the double-acting cylinder. a check valve for preventing the discharge of pressurized oil from the double acting cylinder side with, for including a parallel circuit of the flow control valve for adjusting the flow rate of the hydraulic fluid discharged from the double-acting cylinder side to the tank side, by the relief valve The oil supply supplied to the double-acting cylinder side is kept constant, and even if the oil pressure of the hydraulic source drops sharply, the check valve provided on the primary side piping affects the pressure drop on the double-acting cylinder side. Is suppressed. In addition, the check valve provided on each of the secondary side pipes connected from the direction switching valve to the double-acting cylinder reverses the piston when the pressure on the hydraulic source side drops with respect to the pressure on the double-acting cylinder side. It is possible to keep the moving speed of the piston constant by suppressing the return in the direction and by keeping the flow rate of the pressure oil discharged from the cylinder side constant by the flow control valve provided in the parallel circuit. Become.

(Effect of hydraulic lift control circuit with counter balance valve)
The hydraulic actuator is a double-acting cylinder that slides the piston in both directions by switching between the supply of pressure oil from the hydraulic source and the discharge of pressure oil to the tank side for the ascending cylinder chamber and the descending cylinder chamber. There, the lifting control circuit comprises a directional control valve, the directional control valve is a raised position, it is possible to switch three positions of the neutral position and a lowered position, raising the cylinder chamber and lowering cylinder double-acting cylinder in the neutral position the elevating cylinder chamber and lowering cylinder chamber with disconnected from the hydraulic pressure source so as not to supply the pressure oil is communicated with the tank side against the chamber, the rewritable supply pressure oil to the rising cylinder chamber of the double acting cylinder in the raised position is discharged pressurized oil lowering cylinder chamber, the pressure oil in lowering cylinder chamber of the double acting cylinder is discharged pressure oil Rutotomoni rising cylinder chamber to supply in the lowered position, further double acting cylinder from a direction control valve In the secondary side piping connected to the ascending cylinder chamber, the counterbalance valve that opens when the pressure oil discharged from the ascending cylinder chamber side to the tank side exceeds the predetermined pressure, and the counterbalance valve. Pilot check that is connected in series to prevent oil leakage from the counter balance valve to the tank side in the neutral position and is released when the pressure oil discharged from the ascending cylinder chamber side to the tank side exceeds a predetermined pressure. Since it is equipped with a valve, when the hose housing is lowered by switching to the lowering position of the directional control valve, the pressure of the pressure oil returning from the rising cylinder chamber of the double acting cylinder to the tank side is controlled by the counterbalance valve. Prevents runaway of the hose storage part, which is a load. That is, the set pressure of the relief valve provided in the counter balance valve is set to a value higher than the load pressure by a predetermined value, and the pressure of the pressure oil discharged when the double-acting cylinder is driven downward is the setting of the relief valve. When the pressure is exceeded, it starts to flow to the tank side, and it is possible to suppress runaway when the downward drive of the hose storage part is started.

Also, when the directional control valve is returned to the neutral position after switching the directional control valve to the raised position and raising the hose housing, the counter balance valve is held on the cylinder side because it uses a spool valve. Pressure oil leaks from the gap of the spool valve to the tank side, and the double-acting cylinder that receives the weight of the hose storage part goes down, but the counter balance is due to the pilot check valve being installed in series with the counter balance valve. Leakage oil from the valve can be dammed up, and the raised position of the hose storage part by the double-acting cylinder can be reliably held.

(Effects of check valve, relief valve, and flow rate control valve provided in the lift control circuit with counter balance valve)
In addition, the elevating control circuit is further equipped with a check valve on the primary side pipe where the pressure oil from the flood control source is supplied to the directional control valve to prevent the backflow of the pressure oil to the flood control source on the primary side. between the directional control valve side of the check valve of the piping pipe portion and the directional control valve between the tank return pipe being connected to the tank side, the hydraulic fluid supplied from the hydraulic source to a predetermined pressure in the direction control valve It is equipped with a relief valve to control, and allows flood control to be supplied to the double-acting cylinder side to each of the secondary side pipes connected from the directional control valve to the ascending cylinder chamber and the descending cylinder chamber of the double-acting cylinder. to provide a check valve to prevent Haishutsu of pressure oil from the double acting cylinder side, a parallel circuit of the flow control valve for adjusting the flow rate of the hydraulic fluid returning from the double acting cylinder side to the tank side together, double acting by the relief valve The flood control supplied to the cylinder side is kept constant, and even if the flood control of the hydraulic source drops sharply, the check valve provided on the primary side piping suppresses the effect of the pressure drop on the double acting cylinder side. Will be done. In addition, the check valve provided on each of the secondary side pipes connected from the direction switching valve to the double-acting cylinder reverses the piston when the pressure on the hydraulic source side drops with respect to the pressure on the double-acting cylinder side. It is possible to keep the moving speed of the piston constant by suppressing the return in the direction and by keeping the flow rate of the pressure oil discharged from the cylinder side constant by the flow control valve provided in the parallel circuit. Become.

(Effect of hydraulic lift control circuit with three-way switching valve)
The hydraulic actuator is a double-acting cylinder that slides the piston in both directions by switching between the supply of pressure oil from the hydraulic source and the discharge of pressure oil to the tank side to the ascending cylinder chamber and the descending cylinder chamber. There, the lifting control circuit comprises a first three-way valve the second three-way valve, the first three-way valve is capable of switching two positions of the raised and lowered positions, double acting in the raised position The flood control oil is supplied to the cylinder chamber for raising the cylinder, and the flood control oil in the cylinder chamber for raising is discharged at the lowering position. is discharged pressurized oil lowering cylinder chamber of the double acting cylinder in a position, because you so that to supply pressure oil to the lowering cylinder chamber lowered position, three-way by utilizing the hydraulic pressure from the hydraulic source with a hydraulic pump By operating the double-acting cylinder with the switching valve, the hose storage part stored inside the observer passage can be pushed up from the fire extinguisher lifting port on the road surface to expose it on the road surface, and the flood pressure is sufficiently high for hydraulic drive. By using it, equipment such as double-acting cylinders and valves used in lift control circuits can be miniaturized and the installation space can be reduced.

(Effects of check valve, relief valve, and flow rate control valve provided in the elevating control circuit equipped with a three-way switching valve)
In addition, the elevating control circuit further prevents the check oil from flowing back to the hydraulic source in the primary side piping where the pressure oil from the flood control source is supplied to the first three-way switching valve and the second three-way switching valve. to comprise a check valve, the primary side first from the check valve of the piping of the three-way valve and the second three-way switching valve side pipe portion of the first three-way valve and a second tank from the three-way switching valve between the tank return pipe being connected to the side, the hydraulic fluid supplied from the hydraulic source to the first three-way valve and the second three-way valve comprises a relief valve that controls the predetermined pressure, the first The flood control oil to the double-acting cylinder side is applied to each of the secondary pipes connected from the three-way switching valve to the ascending cylinder chamber of the double-acting cylinder and from the second three-way switching valve to the descending cylinder chamber of the double-acting cylinder. comprising a parallel circuit of a check valve to prevent discharge of pressurized oil from the double acting cylinder side, a flow rate control valve for adjusting the flow rate of the hydraulic fluid discharged from the double-acting cylinder side to the tank side while permitting supply Therefore, the oil supply supplied to the double-acting cylinder side by the relief valve is kept constant, and even if the oil pressure of the hydraulic source drops sharply, the check valve provided in the primary side piping moves to the double-acting cylinder side. The effect of the pressure drop is suppressed. In addition, the check valve provided on each of the secondary side pipes connected from the three-way switching valve to the double-acting cylinder reverses the piston when the pressure on the hydraulic source side drops with respect to the pressure on the double-acting cylinder side. It is possible to keep the moving speed of the piston constant by suppressing the return in the direction and by keeping the flow rate of the pressure oil discharged from the cylinder side constant by the flow control valve provided in the parallel circuit. Become.

(Effect of lift control circuit that hydraulically drives a single-acting cylinder)
Further, the hydraulic actuator, the piston is toward selfish slide on one side by the supply of pressure oil from the hydraulic source to the cylinder chamber, the other more piston springs in a state of being discharged from the cylinder chamber pressure oil to the tank side a single acting cylinder for countercurrent selfish slide to the side, elevation control circuit comprises a three-way valve, three-way valve is capable of switching two positions of the raised and lowered positions, the single-acting cylinder in the raised position Since the pressure oil is supplied to the cylinder chamber and the pressure oil is discharged from the cylinder chamber at the descending position, only one three-way switching valve is required compared to the elevating control circuit of the double-acting cylinder, and the circuit configuration is simple and cost effective. Reduction is possible.

(Effects of check valves and flow control valves provided in the lift control circuit that hydraulically drives the single-acting cylinder)
In addition, the elevating control circuit is further equipped with a check valve on the primary side pipe where the pressure oil from the flood control source is supplied to the three-way switching valve to prevent the check oil from flowing back to the flood control source on the primary side. between the than the check valve of the pipe three-way valve side piping section and the three-way valve with the tank return pipe being connected to the tank side, the hydraulic fluid supplied from the hydraulic source to a predetermined pressure to the three-way switching valve A first flow control that is equipped with a relief valve to control and can adjust the flow rate of pressure oil supplied from the flood control source to the single-acting cylinder side in the piping section on the three-way switching valve side from the check valve of the primary side piping. a valve, for return tank pipe, for a second flow control valve capable of adjusting the flow rate of the hydraulic fluid discharged to the tank side from single-acting cylinder side, it is supplied to the single-acting cylinder side by the relief valve The oil pressure is kept constant, and even if the oil pressure of the oil pressure source drops sharply, the influence of the pressure drop on the single-acting cylinder side is suppressed by the check valve provided in the primary side pipe. Further, by setting the flow rate of the pressure oil supplied and discharged to the single-acting cylinder side by the flow rate control valve to a constant flow rate, the moving speed of the piston can be kept constant.

(Effect of pilot check valve and flow control valve provided in the lift control circuit that hydraulically drives the single-acting cylinder)
Further, the elevating control circuit further passes through a pilot check valve that opens when the oil pressure on the single-acting cylinder side exceeds a predetermined pressure and a pilot check valve through a pipe that communicates from the cylinder chamber to the tank side. Since it is equipped with a series circuit with a flow control valve that adjusts the flow rate of pressure oil flowing to the side, the pilot check valve opens when a shocking force is applied to the single-acting cylinder from the hose storage side, which is the load. The flow rate of pressure oil adjusted by the flow control valve flows to the tank side, absorbs the impact, and enables smooth movement.

(Effect of hydraulic lift control circuit with four-way switching valve)
The hydraulic actuator is a double-acting cylinder that slides the piston in both directions by switching between the supply of pressure oil from the hydraulic source and the discharge of pressure oil to the tank side for the ascending cylinder chamber and the descending cylinder chamber. There, the lifting control circuit includes a four-way switching valve, four-way switching valve is capable of switching two positions of the raised and lowered positions, supplies the pressure oil to the rising cylinder chamber of the double acting cylinder in the raised position When using a three-way switching valve, the pressure oil in the lowering cylinder chamber is discharged, and the ascending cylinder chamber and the lowering cylinder chamber are communicated at the lowering position so that the piston is lowered by the load pressure due to the weight of the hose housing. Two units are required, but this requires only one four-way switching valve, which simplifies the configuration of the elevating control circuit and makes it smaller.

(Effects of check valves, relief valves, and flow control valves provided in lift control circuits equipped with four-way switching valves)
In addition, the elevating control circuit is further equipped with a check valve on the primary side pipe where the pressure oil from the flood control source is supplied to the four-way switching valve to prevent the check oil from flowing back to the flood control source on the primary side. between than the check valve of the piping of the four-way switching valve side piping section and the four-way switching valve with the tank return pipe being connected to the tank side, the hydraulic fluid supplied from the hydraulic source to the four-way switching valve to a predetermined pressure It is equipped with a relief valve to control, and allows flood control to be supplied to the double-acting cylinder side for each of the secondary side pipes connected from the four-way switching valve to the ascending cylinder chamber and descending cylinder chamber of the double-acting cylinder. to provide a check valve for preventing the discharge of pressurized oil from the double acting cylinder side, a parallel circuit of a flow rate control valve for adjusting the flow rate of the hydraulic fluid discharged from the double-acting cylinder side to the tank side with a relief valve The oil supply to the double-acting cylinder side is kept constant, and even if the oil pressure of the hydraulic source drops sharply, the check valve provided on the primary side pipe reduces the pressure to the double-acting cylinder side. The effect is suppressed. In addition, the check valve provided on each of the secondary side pipes connected from the four-way switching valve to the double-acting cylinder reverses the piston when the pressure on the hydraulic source side drops with respect to the pressure on the double-acting cylinder side. The movement speed of the piston can be kept constant by suppressing the return in the direction and by keeping the flow rate of the pressure oil discharged from the double acting cylinder side constant by the flow control valve provided in the parallel circuit. It will be possible.

(Effect of lifting drive by gas pressure)
Another is in the form, fire hydrant apparatus comprising a hose housing section housing a hose with a nozzle, an elevating mechanism for elevating the hose housing portion, and a lift control circuit for controlling the lifting mechanism of the present invention, and the When the fire hydrant device does not use a fire hydrant, the hose compartment is housed in the observer passage in the tunnel, and when using a fire hydrant, the hose compartment is raised and held in an exposed position on the road surface of the observer passage. In the in- tunnel fire hydrant equipment installed as described above, the elevating mechanism is equipped with a gas pressure actuator that elevates the hose accommodating portion, and the elevating control circuit raises the hose accommodating portion to the exposed position when the fire hydrant is used. the gas pressure was controlled to gas pressure actuator as in the case for housing the fire hydrants to the wardens passage, due to so as to control the gas pressure to gas pressure actuator so as to lower the hose storage unit in the storage position, the tunnel In the event of a vehicle accident accompanied by a fire, when a predetermined switch is operated, the hose storage part housed in the observer passage is a lift mechanism by a lift control circuit that uses gas pressure such as air pressure or gas pressure as a drive source. It is pushed up by the operation of and exposed on the road surface of the observer passage, and the hose with a nozzle is easily and easily pulled out from the exposed hose storage part on the observer passage to extinguish the fire without the need to open the fire hydrant door. It can be performed.

Explanatory drawing showing tunnel emergency equipment including fire hydrant equipment installed in a shield tunnel Explanatory drawing showing the fire hydrant equipment from the road side Explanatory drawing showing the internal structure of the fire hydrant equipment in a cross section seen from the road side Explanatory drawing showing the internal structure of the hose storage part in the fire hydrant equipment with a cross section of the observer passage. Explanatory drawing showing the state where the hose storage part is raised by the elevating mechanism and exposed on the observer passage in the cross section seen from the road side. Explanatory drawing which showed the embodiment of the elevating control circuit for hydraulic drive together with the water discharge control circuit. Explanatory drawing which showed ascending control and descending control of the ascending / descending control circuit of FIG. Explanatory drawing which showed embodiment of the elevating control circuit for hydraulic drive using a directional control valve Explanatory drawing which showed other embodiment of the elevating control circuit for hydraulic drive using a counter balance valve. Explanatory drawing which showed embodiment of the elevating control circuit for hydraulic drive using a three-way switching valve Explanatory drawing which showed embodiment of the elevating control circuit which hydraulically drives a single-acting cylinder Explanatory drawing which showed embodiment of the lift control circuit for hydraulic drive using four-way switching valve Explanatory drawing showing the internal structure of the fire hydrant equipment using air pressure as the drive source of the elevating mechanism in a cross section seen from the road side. Explanatory drawing which showed the embodiment of the elevating control circuit for pneumatic drive together with the water discharge control circuit.

[Overview of fire extinguishing equipment in the tunnel]
FIG. 1 is an explanatory diagram showing tunnel emergency equipment including a fire hydrant equipment installed in a tunnel of a motorway. As shown in FIG. 1, the inside of the tunnel 10 constructed by the shield method is covered with a cylindrical tunnel wall surface 12, and a road 15 is provided by being partitioned by a floor slab 18, and in this example, the road 15 is provided. Road 15 has two lanes in one direction.

An observer passage 14 is provided along the tunnel wall surface 12 on the left side of the road 15 partitioned by the floor slab 18, and the internal space below the observer passage 14 is used as a duct 22 and conduits and the like are laid. ..

The lower side of the floor slab 18 on which the road 15 is formed is divided into a plurality of sections in the lateral direction of the tunnel. For example, the section located under the observer passage 14 is used as the management passage 20 and also. The management passage 20 is used as an emergency evacuation passage in the event of a fire in the tunnel. A water supply main 24 is laid in the management passage 20.

Fire hydrant equipment 16 is installed every 50 meters in the longitudinal direction of the tunnel 10, and the fire hydrant equipment 16 is separately installed in the hose storage unit 44 and the control mechanism storage unit 45.

The hose storage portion 44 is arranged in a fire hydrant embedding portion that is hollowed out in a box shape over the road surface of the observer passage 14 and the wall surface on the road 15 side. The control mechanism storage unit 45 is arranged in a management passage 20 below the hose storage unit 44, and a branch pipe branched from the water supply main pipe 24 is drawn in, and water supply for supplying fire extinguishing water to the hose storage unit 44. The piping has been set up.

A hose with a nozzle is housed in the hose storage portion 44 of the fire hydrant equipment 16, and is supported by an elevating mechanism in the observer passage 14. When a predetermined ascending operation is performed, the elevating mechanism exposes the exposed position on the observer passage 14. The hose storage portion 44 is raised to be exposed, and fire extinguishing work can be performed by pulling out the hose with a nozzle.

[Installation structure of fire hydrant equipment]
FIG. 2 is an explanatory view showing the fire hydrant equipment from the road side, FIG. 3 is an explanatory view showing the internal structure of the fire hydrant equipment in a cross section seen from the road side, and FIG. An explanatory view showing a cross section of the passage, FIG. 5 is an explanatory view showing a state in which the hose accommodating portion is raised by the elevating mechanism and exposed on the observer passage in a cross section seen from the road side.

(Exterior structure of fire hydrant equipment)
As shown in FIG. 2, the hose storage portion 44 of the fire hydrant equipment 16 is installed in the internal space under the floor of the observer passage 14 provided with the handrail 40, and is a combination of the elevating mechanism 46 using the pantograph mechanism. It is arranged so that it can be raised and lowered by driving the hydraulic pressure cylinder 60-1.

A notification device panel 28 and a fire hydrant panel 26 are installed on the front wall 14a facing the road of the observer passage 14 where the fire hydrant equipment 16 is installed. The fire hydrant panel 26 is fixedly installed by screwing or the like, and can be removed when inspecting the inside.

The reporting device panel 28 is provided with a red indicator lamp 30, a transmitter 32, and a response lamp 34. The red indicator light 30 is constantly lit so that the installation location of the fire hydrant equipment 16 can be seen from a distance. In the event of a fire, when the transmitter 32 is pressed and the push button switch is turned on, a fire alarm signal is sent to the disaster prevention receiver of the monitoring center to issue a fire alarm, and a response signal is sent from the disaster prevention receiver to respond. The lamp 34 is turned on and the red indicator lamp 30 is blinked.

Further, the notification device panel 28 is provided with an ascending switch 36a and a descending switch 36b for ascending and descending the hose accommodating portion of the fire hydrant equipment 16 arranged in the observer passage 14.

Further, the handrail 40 is not provided in the portion of the observer passage 14 in which the fire hydrant equipment 16 is installed, which interferes with the operation of the hose storage portion that rises from the inside and is exposed on the road surface of the observer passage 14. I try not to be.

The panel portion of the notification device panel 28 on which the ascending switch 36a and the descending switch 36b are arranged is oblique to the shoulder portion of the observer passage 14 in order to enable operation from both the road 15 side and the observer passage 14. It may be arranged so as to be located in, or it may be arranged in another place.

(Structure of fire hydrant equipment installed in the internal space)
As shown in FIGS. 3 and 4, a rectangular fire hydrant elevating port 42 is opened on the road surface corresponding to the installation location of the fire hydrant equipment 16 in the observer passage 14, and is located above the opening edge of the fire hydrant elevating port 42. Is formed with a step portion 42a.

A hose storage portion 44 of the fire hydrant equipment 16 is arranged so as to be able to move up and down with respect to the fire hydrant elevating port 42 from below. The hose storage portion 44 includes a box-shaped housing 48 opened on the front surface and the back surface, and four frame pipes 52 are arranged in the openings on the front surface and the back surface of the housing 48, and a hose outlet 55 is formed between them. ing.

Inside the hose storage portion 44, the hose 54 having the nozzle 56 attached to the tip is stored in an inwardly wound state, and the nozzle 56 attached to the tip of the hose is arranged in the central portion of the inwardly wound hose 54. The nozzle 56 can be taken out from either the front surface or the back surface of the hose.

Further, in the hose storage unit 44, a water discharge switch 38a and a water discharge stop switch 38b for operating the water discharge control circuit provided in the control mechanism storage unit 45 arranged in the management passage 20 are provided. ..

The hose storage portion 44 is supported by an elevating mechanism 46 so as to be able to elevate and lower. In the present embodiment, the elevating mechanism 46 using the pantograph mechanism using the pantograph mechanism as the elevating mechanism 46 has two link arms. It is composed of 46a and 46b. The left end of the link arm 46a is rotatably supported by the base 41 by the fulcrum 47a, and the left end of the link arm 46b is rotatably supported by the mounting base 43 by the fulcrum 47b, and the link arms 46a and 46b intersect at the center. It is rotatably connected at the fulcrum 47c.

Further, the right end of the link arm 46a is movably supported by the roller 49a along the mounting base 43, and the right end of the link arm 46b is movably supported by the roller 49b on the base 41.

A piston cylinder mechanism is provided as a drive mechanism for the elevating mechanism 46, and the lower end of the double hydraulic cylinder 60-1 is rotatably connected to the link arm 46b by a fulcrum 51a and slid into the double hydraulic cylinder 60-1. The tip of the piston rod 63 connected to the movably provided piston 61 is rotatably connected to the link arm 46a by a fulcrum 51b.

A control mechanism storage unit 45 is arranged in the management passage 20 below the internal space in which the elevating mechanism 46 is arranged, and the control mechanism storage unit 45 supplies fire extinguishing water to the hose 54 of the hose storage unit 44. A water discharge control circuit for discharging water and an elevating control circuit for driving the elevating mechanism 46 up and down are provided.

A branch pipe 24a branched from the water supply main 24 that functions as a water pressure source is connected to the control mechanism storage unit 45, and fire extinguishing water (pressure water) supplied from the fire pump equipment to the water supply main 24 is introduced. ing.

The pipe 57 from the water discharge control circuit built in the control mechanism accommodating portion 45 is connected to the flexible joint 65 which is the hose connection port of the hose accommodating portion 44 via the connecting hose 62. The connecting hose 62 has a hose length with a margin necessary for connection when the hose storage portion 44 is pushed up from the fire hydrant elevating port 42 of the observer passage 14 and held in the exposed position by the elevating mechanism 46. As a result, even if the hose storage portion 44 moves up and down with respect to the pipe on the fixed side, the hose storage portion 44 can move without disconnecting the connecting hose 62. Further, the movement of the connecting hose 62 generated by the elevating operation is absorbed by the movement of the flexible joint 65.

Further, from the elevating control circuit built in the control mechanism accommodating portion 45, two pipes 58 for supplying and draining fire extinguishing water are connected to the double-acting hydraulic cylinder 60-1 of the elevating mechanism 46.

Here, the hose storage unit 44 and the control mechanism storage unit 45 are connected to the hose storage unit 44 and the control mechanism storage unit 45, although the inside of the observer passage is the connecting hose 62 and the management passage 20 side is the piping. The space may be directly connected by a connecting hose. Also in this case, one or both of the connecting hoses are connected to the hose storage portion 44 side and the control mechanism storage portion 45 by a flexible joint.

[Operation of fire hydrant equipment]
(During normal monitoring)
During normal monitoring when a vehicle is passing through the road of the tunnel 10 shown in FIG. 1, the hose storage portion 44 of the fire hydrant equipment 16 is provided in the control mechanism storage portion 45 as shown in FIGS. 2 to 4. Since the supply of fire extinguishing water from the water discharge control circuit is stopped, the double-acting hydraulic cylinder 60-1 of the elevating mechanism 46 positions the piston 61 at the lowest point, whereby the elevating mechanism 46 moves the hose storage portion 44. Is stored in the internal space of the observer passage 14, and the road surface plate 50 on the upper surface of the housing 48 is pressed against the step portion 42a of the fire hydrant elevating port 42 to support the fire hydrant passage 14, and the fire hydrant equipment 16 is installed in the observer passage 14. Even so, it does not obstruct or pose a danger to the passage of people through the observer passage 14.

(In case of fire)
On the other hand, when a vehicle accident accompanied by a fire occurs in the tunnel 10, the user goes to the fire hydrant facility 16 near the place where the fire occurred and pushes the transmitter 32 of the notification device panel 28 shown in FIG. 2 to prevent disaster prevention at the monitoring center. A fire notification signal is transmitted to the receiving panel, a confirmation response signal is received from the disaster prevention receiving panel, the response lamp 34 is turned on, and the red indicator lamp 30 blinks to confirm the completion of the notification to the monitoring center side.

Subsequently, in order to extinguish the fire, the ascending switch 36a provided on the notification device panel 28 is pressed to turn it on. Fire water to double acting hydraulic cylinder 60-1 of the UP switch 36 a of the on-operation by the control mechanism from the accommodating unit 45 elevating mechanism 46 is transmitted, the piston 61 is raised by Fire water supplied into the cylinder, the piston rod The distance between the link arm 46a and the link arm 46b is expanded via 63.

Link arm 46a, the distance 46b is widened, central link arm 46a of the fulcrum 47c, the spread angle of 46b, moves the link arm 46a, the right end of the roller 49a, 49 b of 46b to the left, as a result, The mounting base 43 is pushed upward, and the hose storage portion 44 attached to the mounting base 43 is pushed up.

For this reason, the road surface plate 50 closing the fire hydrant elevating port 42 of the observer passage 14 is lifted, the hose storage portion 44 stored inside slowly appears from the road surface, rises to the exposed position shown in FIG. 5, and stops. , Hold this exposed position.

When the hose storage portion 44 is held in the exposed state on the observer passage 14 in this way, the user can easily and easily take out the nozzle 56 from the road side through the front opening of the housing 48 to easily and easily hose. 54 can be pulled out.

Subsequently, when the user presses the water discharge switch 38a provided in the exposed hose storage unit 44 to turn it on, an open control signal is output to the water discharge control circuit of the control mechanism storage unit 45, and fire extinguishing water is supplied via the connecting hose 62. It is supplied to the hose 54, and the fire can be extinguished by discharging water from the nozzle 56.

On the other hand, when the user extinguishes a fire from the observer passage 14 side, it is easy and easy to take out the nozzle 56 from the back opening of the housing 48 in the hose storage portion 44 exposed and held on the observer passage 14. The hose 54 can be easily pulled out to extinguish the fire.

When the fire is extinguished and the fire extinguishing work is completed, when the water discharge stop switch 38b provided in the hose storage unit 44 is pressed to turn it on, a water discharge stop signal is output to the water discharge control circuit of the control mechanism storage unit 45, and the nozzle 56 water discharge from the Ru is stopped.

Further, in the restoration work after the fire extinguishing work is completed, after draining the hose 54 , the hose 54 is stored in the hose storage portion 44 exposed and held on the observer passage 14 in an inwardly wound state. .. Subsequently, by turning on the lowering switch 36b provided on the notification device panel 28, the hose storage portion 44 is lowered by the elevating mechanism 46, and the road surface plate 50 is lowered to a position where the road surface plate 50 hits the step portion 42a of the fire hydrant elevating port 42. Then, the hose storage unit 44 is stored in the internal space of the observer passage 14.

[Water discharge control circuit]
FIG. 6 is an explanatory diagram showing an embodiment of a water discharge control circuit and an elevating control circuit provided in a control mechanism accommodating portion installed in a management passage.

(Water discharge control circuit)
As shown in FIG. 6, the water discharge control circuit 64 draws in a branch pipe 24a from the water supply main, and a check valve 70 is connected to a remote fire hydrant valve 72 using an electric valve. Following the remote hydrant valve 72 is self-valve 76 is connected via a gate valve 75, the secondary side of the automatic pressure regulating valve 76 is coupled to the hose receiving portion 44 through the connection hose 62. Further, from the front of the sluice valve 75, the pipe is branched to the drainage side, and the test drainage valve 74 is connected.

The remote fire hydrant valve 72 is opened and controlled by operating the water discharge switch 38a provided in the hose storage portion 44 shown in FIG. 2, and fire extinguishing water is supplied to the hose storage portion 44 side. Further, when the water discharge stop switch 38b provided in the hose storage portion 44 shown in FIG. 2 is operated during the water discharge operation, the remote fire hydrant valve 72 is closed and controlled, and the supply of fire extinguishing water to the hose storage portion 44 is stopped.

Instead of using the remote fire hydrant valve 72 as an electric valve, a fire hydrant valve opening / closing lever may be provided in the hose storage portion 44 and connected with a link wire, and the fire hydrant valve may be opened / closed by remote control by operating the fire hydrant valve opening / closing lever. ..

(Elevation control circuit)
As shown in FIG. 6, the elevating control circuit 66 includes a first three-way switching valve 82 and a second three-way switching valve 84. In the following description, the three-way switching valves 82 and 84 are referred to.

The three-way switching valves 82 and 84 are electric switching valves that are switched and operated by being driven by a motor. The three-way switching valve 82 can switch between two positions, an ascending position in which the ports a and b communicate with each other and a descending position in which the ports b and c communicate with each other. Further, the three-way switching valve 84 can switch between two positions, an ascending position in which the ports b and c communicate with each other and a descending position in which the ports a and b communicate with each other.

A check valve 78 is provided in the branch pipe drawn from the water supply main pipe 24 which is a water pressure source, followed by an automatic pressure regulating valve 80. The check valve 78 closes when the water pressure on the water supply main 24 side drops to prevent the backflow of fire extinguishing water. The automatic pressure regulating valve 80 controls the pressure of the fire extinguishing water (pressure water) supplied to the cylinder side to a predetermined pressure. A constant flow rate valve may be used instead of the automatic pressure regulating valve 80.

The secondary side of the automatic pressure regulating valve 80 is connected to the ports a of the three-way switching valves 82 and 84. The port b of the three-way switching valve 82 is connected to the ascending cylinder chamber 60a of the double-acting hydraulic cylinder 60-1, and the port b of the three-way switching valve 84 is connected to the descending cylinder chamber 60b of the double-acting hydraulic cylinder 60-1. Will be done. Further, the ports c of the three-way switching valves 82 and 84 are connected to the drain side.

A parallel circuit of the flow control valve 86 and the check valve 88 is connected to the secondary side pipe connected from the three-way switching valve 82 to the ascending cylinder chamber 60a of the double hydraulic cylinder 60-1, and the three-way switching valve is also connected. also connected to secondary side piping lowering cylinder chamber 60b of the double-acting hydraulic cylinders 60-1 to 84, the parallel circuit of the flow control valve 90 and the check valve 92 is connected.

The flow rate control valve 90 controls the flow rate of fire extinguishing water discharged from the lowering cylinder chamber 60b when the double-acting hydraulic cylinder 60-1 is driven up to a set flow rate, so that the ascending speed of the hose accommodating portion 44 by the piston 61 Is controlled to a predetermined speed.

The flow rate control valve 86 controls the flow rate of the fire extinguishing water discharged from the ascending cylinder chamber 60a to the set flow rate when the double-acting hydraulic cylinder 60-1 is driven downward, so that the lowering speed of the hose housing portion 44 by the piston 61 Is controlled to a predetermined speed.

(Control operation by elevating control circuit)
7A and 7B are explanatory views showing the ascending control and the descending control of the ascending / descending control circuit of FIG. 6, FIG. 7A shows the ascending control, and FIG. 7B shows the descending control.

First, during normal monitoring, as shown in FIG. 6, the three-way switching valves 82 and 84 are in the switching position where the ports b and c are communicated with each other, and the cylinder for raising the double-acting hydraulic cylinder 60-1. Both the chamber 60a and the lowering cylinder chamber 60b are communicated with each other on the drain side, and are in the lowering stop position under the load pressure due to the weight of the hose accommodating portion 44, and the hose accommodating portion 44 is accommodated in the observer passage 14. There is.

When the ascending operation is performed in this state, as shown in FIG. 7A, the three-way switching valve 82 switches to the ascending position where the ports a and b communicate with each other, and the fire extinguishing water is the ascending cylinder of the double-acting hydraulic cylinder 60-1. It is supplied to the chamber 60a, and the piston 61 starts to rise by overcoming the load pressure due to the weight of the hose storage portion 44. As the piston 61 rises, the fire extinguishing water in the lowering cylinder chamber 60b flows out to the drain side through the three-way switching valve 84, and at this time, the rising speed of the hose accommodating portion 44 by the piston 61 is determined by the set flow rate flowing through the flow rate control valve 90. ..

When the piston 61 reaches the full stroke, the hose storage portion 44 stops rising and is exposed on the observer passage 14, so that the fire can be extinguished by pulling out the hose with a nozzle. In the state where the hose storage portion 44 is stopped in the ascending position, the supply of fire extinguishing water to the ascending cylinder chamber 60a of the double hydraulic cylinder 60-1 is maintained by keeping the three-way switching valve 82 in the ascending position, and the piston 61. Holds the hose storage portion 44 in the ascending stop position by obtaining a pushing force exceeding the load pressure.

Further, if the water pressure on the water supply main 24 side temporarily drops while the hose storage portion 44 is held in the ascending stop position, the pressure drop on the cylinder side is prevented by closing the check valve 78. , The hose storage portion 44 can be stably held in the ascending stop position.

When the fire extinguishing work is completed, the hose is drained and stored in the hose storage unit 44, when the lowering operation is performed, the three-way switching valve 82 communicates the ports b and c as shown in FIG. 7 (B). It is switched to a lowering position to allow the three-way switching valve 84 to communicate with the ports a and b.

Therefore, fire extinguishing water is supplied to the lowering cylinder chamber 60b of the double-acting hydraulic cylinder 60-1 via the three-way switching valve 84, and the ascending cylinder chamber 60a is communicated with the drain side via the three-way switching valve 82 to extinguish the fire. The piston 61 starts descending under the load pressure due to the water pressure of the above and the weight of the hose housing portion 44. As the piston 61 descends, the fire extinguishing water in the ascending cylinder chamber 60a flows out to the drain side through the three-way switching valve 82, and at this time, the descending speed of the hose accommodating portion 44 by the piston 61 is determined by the set flow rate flowing through the flow rate control valve 86. ..

When the piston 61 strokes to the descending stop position, the hose accommodating portion 44 is accommodated in the observer passage 14, and the ports b and c of the three-way switching valve 84 are communicated with each other by a signal such as a detection switch operating at the descending stop position. It is switched to the ascending position, which returns to the normal monitoring shown in FIG.

[Elevation control circuit for hydraulic drive equipped with directional control valve]
FIG. 8 is an explanatory diagram showing an embodiment of a lift control circuit for hydraulic drive using a directional control valve.

(Structure of elevating control circuit)
As shown in FIG. 8, the lift control circuit for hydraulic drive according to the present embodiment is a hydraulic source for the raising cylinder chamber 60a and the lowering cylinder chamber 60b of the double acting hydraulic cylinder 60-2 that supports the hose storage portion as a load. By switching between the supply of pressure oil from 96 and the discharge of pressure oil to the tank 98 side, the piston is slid bidirectionally to raise and lower the hose storage portion.

The elevating control circuit of the present embodiment includes a directional control valve 100, and is in an ascending position and neutral due to the movement of the spool by an electromagnetic solenoid between the ports P and T on the primary side and the ports A and B on the secondary side. It is possible to switch between three positions, the position and the descending position. Here, the directional control valve 100 disconnects the ports P and T on the primary side from the ports A and B on the secondary side in the neutral position, and makes a straight connection in the ascending position and a cross connection in the descending position.

A check valve 104 is provided in the pipe from the hydraulic source 96 and closes when the oil pressure of the hydraulic source 96 temporarily drops to prevent the secondary side from dropping in flood control. The secondary side of the check valve 104 is connected to the port P of the directional control valve 100, and the tank 98 side is connected to the port T of the directional control valve 100.

Port A of the directional control valve 100 is connected to the ascending cylinder chamber 60a of the double-acting hydraulic cylinder 60-2, and port B of the directional control valve 100 is connected to the descending cylinder chamber 60b of the double-acting hydraulic cylinder 60-2. ..

A relief valve 106 is connected between the pipes for the ports P and T on the primary side of the directional control valve 100. A predetermined relief pressure required for driving the cylinder is set in the relief valve 106, and when the oil pressure from the hydraulic source 96 exceeds the set relief pressure, the relief valve 106 opens to allow excess flow to flow to the tank 98 side, and the port The pressure of the pressure oil supplied to P is maintained at a predetermined set relief pressure.

A parallel circuit of the flow control valve 108 and the check valve 110 is connected to the secondary side pipe connected from the directional control valve 100 to the ascending cylinder chamber 60a of the double-acting hydraulic cylinder 60-2, and the directional control valve is also connected. also connected to secondary side piping lowering cylinder chamber 60b of the double-acting hydraulic cylinders 60-2 100, a parallel circuit of the flow control valve 112 and check valve 114 are connected.

The flow rate control valve 112 determines the ascending speed of the hose accommodating portion by the piston by controlling the flow rate of the pressure oil discharged from the descending cylinder chamber 60b to the set flow rate when the double acting hydraulic cylinder 60-2 is driven ascending. Let the speed control.

The flow rate control valve 108 determines the lowering speed of the hose accommodating portion by the piston by controlling the flow rate of the pressure oil discharged from the ascending cylinder chamber 60a to the set flow rate when the double-acting hydraulic cylinder 60-2 is driven downward. Let the speed control.

Such an elevating control circuit realizes so-called double meter-out control in which the flow rate of the pressure oil returning from the double-acting hydraulic cylinder 60-2 to the tank 98 side is controlled by the flow rate control valves 108 and 112.

(Controller unit)
A control unit 94 is provided on the hose storage portion 44 side. For the control unit 94, the red indicator lamp 30, the transmitter 32, the response lamp 34, the ascending switch 36a, the descending switch 36b, and the hose accommodating portion shown in FIG. 3 provided on the notification device panel 28 shown in FIG. A water discharge switch 38a and a water discharge stop switch 38b provided in the 44 are connected.

Further, the remote fire hydrant valve 72 of the water discharge control circuit 64 and the three-way switching valves 82 and 84 of the elevating control circuit 66 are connected to the control unit 94. Further, the control unit 94 is connected to a transmission line drawn from the disaster prevention receiving board installed in the monitoring center, and transmits / receives IP packets to / from the disaster prevention receiving board via the transmission line. Therefore, a unique IP address is set in the control unit 94.

When the control unit 94 inputs a signal operated by the transmitter 32 provided on the notification device panel 28 of FIG. 2, the control unit 94 causes the disaster prevention receiving panel to transmit a fire notification signal, and receives a confirmation response signal from the disaster prevention receiving panel. Control is performed so that the response lamp 34 is turned on and the red indicator lamp 30 is blinked.

Further, when the control unit 94 inputs the operation signal of the ascending switch 38a provided on the notification device panel 28 of FIG. 2, the hose accommodating portion 44 is raised by the control of the three-way switching valves 82 and 84 to be on the observer passage 14. Controls the exposure to.

Further, when the operation signal of the water discharge switch 38a shown in FIG. 3 is input, the control unit 94 controls to open the remote fire hydrant valve 70 to discharge fire extinguishing water from the hose with a nozzle.

Further, when the operation signal of the water discharge stop switch 38b shown in FIG. 3 is input, the control unit 94 controls to close the remote fire hydrant valve 70 to stop the discharge of fire extinguishing water from the hose with a nozzle.

(Control operation by elevating control circuit)
First, during normal monitoring, as shown in FIG. 8, the directional control valve 100 is in the neutral position, and both the ascending cylinder chamber 60a and the descending cylinder chamber 60b of the double acting hydraulic cylinder 60-2 are hydraulic sources. It is separated from the 96 and the tank 98 side, the piston is in the descending stop position under the load pressure due to the weight of the hose storage portion 44, and the hose storage portion is housed in the observer passage.

When the ascending operation is performed in this state, the directional control valve 100 is switched to the ascending position which is a straight connection, the pressure oil from the hydraulic source 96 is supplied to the ascending cylinder chamber 60a of the double acting hydraulic cylinder 60-2, and the hose. The piston starts to rise by overcoming the load pressure due to the weight of the storage part. As the piston rises, the pressure oil in the lowering cylinder chamber 60b flows out to the tank 98 side through the directional control valve 100, and at this time, the rising speed of the hose accommodating portion by the piston is determined by the set flow rate flowing through the flow rate control valve 112.

When the piston reaches the full stroke, the hose storage section stops rising and is exposed on the observer passage, so that the hose with a nozzle can be pulled out to extinguish the fire. The direction control valve 100 is switched to the neutral position by detecting the state in which the hose accommodating portion is stopped in the ascending position with, for example, an ascending position detection switch, and the pressure oil is contained in the cylinder side to move the piston to the ascending stop position. And hold the hose storage part in the ascending stop position.

Further, when the spool valve leaks from the cylinder side to the tank side in the state where the directional control valve 100 is switched to the neutral position, the piston of the double-acting hydraulic cylinder 60-2 is lowered from the ascending / stopping position. In order to prevent this, the directional control valve 100 may be held in the ascending position, and the pressure oil may be continuously supplied to the ascending cylinder chamber 60a of the double-acting hydraulic cylinder 60-2.

Further, if the flood control of the hydraulic source 96 temporarily drops while the double-acting hydraulic cylinder 60-2 is held in the ascending stop position, the check valve 104 closes to prevent the pressure drop on the cylinder side. The hose storage unit can be stably held in the ascending stop position.

When the fire extinguishing work is completed, the hose is drained, stored in the hose storage portion, and the lowering operation is performed, the directional control valve 100 is switched to the lowering position which is a cross connection. Therefore, the pressure oil from the hydraulic source 96 is supplied to the lowering cylinder chamber 60b of the double-acting hydraulic cylinder 60-2 via the ports P and B of the directional control valve 100, and the ascending cylinder chamber 60a is the directional control valve 100. The piston is communicated to the tank 98 side via the ports A and T, and the piston starts to descend due to the load pressure due to the oil pressure and the weight of the hose storage portion.

As the piston descends, the pressure oil in the ascending cylinder chamber 60a flows out to the tank 98 side through the directional control valve 100, and at this time, the descending speed of the hose accommodating portion by the piston is determined by the set flow rate flowing through the flow rate control valve 108.

When the piston of the double-acting hydraulic cylinder 60-2 strokes to the descending stop position, the hose storage portion is accommodated in the observer passage, and the direction control valve 100 is placed in the neutral position by a signal such as a detection switch operating at the descending stop position. Switch to, which returns to the normal monitoring state.

[Elevation control circuit for hydraulic drive equipped with counter balance valve]
FIG. 9 is an explanatory diagram showing another embodiment of the lift control circuit for hydraulic drive using the counter balance valve.

The elevating control circuit of the present embodiment includes the directional control valve 100 as in the elevating control circuit shown in FIG. 8, but the directional control valve 100 of the present embodiment is a port on the secondary side when the position is switched to the neutral position. The difference is that A and B are communicated with the port T on the primary side, and along with this, a counter ballast valve 116 and a pilot check valve 118 are provided, and other configurations and operations are provided. Is the same as that of the embodiment shown in FIG.

A counter balance valve 116 and a pilot check valve 118 are provided on the secondary side pipe connecting the port A of the directional control valve 100 and the raising cylinder chamber 60a of the double-acting hydraulic cylinder 60-2.

The counterbalance valve 116 corresponds to a circuit in which a check valve 120 and a relief valve 122 are connected in parallel, and a spool valve is used. The counterbalance valve 116 is a double-acting hydraulic cylinder 60-2 under load pressure. By suppressing the discharge of pressure oil from the ascending cylinder chamber 60a, the piston of the double-acting hydraulic cylinder 60-2 is held at the ascending stop position to prevent its own weight from falling.

The relief valve 122 of the counter balance valve 116 is set to a predetermined pressure obtained by adding a predetermined value to the load pressure received by the double acting hydraulic cylinder 60-2, and the counter balance valve 116 is closed even when the load pressure is received. Therefore, the weight of the hose storage part is prevented from falling due to the load pressure.

By the way, since the counterbalance valve 116 uses a spool valve, it receives the load pressure when the double-acting hydraulic cylinder 60-2 is held in the ascending / stopping position, and thus passes through the gap of the spool valve to the port T side. In some cases, oil leaks and the piston of the double-acting hydraulic cylinder 60-2 under load pressure goes down, making it impossible to hold the hose housing in the ascending / stopping position.

A pilot check valve 118 is connected in series in order to prevent the counter balance valve 116 from dropping due to its own weight due to oil leakage. The pilot check valve 118 takes in the pressure of the input port as the pilot pressure, and when the pressure exceeds a predetermined set pressure, the check function is released and the pressure oil can flow in the reverse direction.

In the present embodiment, by setting the set pressure of the pilot check valve 118 to be the same as the set pressure of the counter balance valve 116, the double acting hydraulic cylinder 60-2 is set to the ascending stop position by closing the counter balance valve 116. The pilot check valve 118 prevents oil leakage due to the load pressure when it is held, and makes it possible to reliably prevent the vehicle from dropping by its own weight.

The counter balance valve 116 and the pilot check valve 118 shown in the figure have the same functions even if their positions are exchanged.

[Elevation control circuit for hydraulic drive equipped with a three-way switching valve]
10A and 10B are explanatory views showing an embodiment of an ascending / descending control circuit for hydraulic drive using a three-way switching valve, FIG. 10A shows ascending control, and FIG. 10B shows descending control. ..

The elevating control circuit of the present embodiment corresponds to a circuit in which the elevating control circuit for hydraulic drive shown in FIG. 6 is used for hydraulic drive.

As shown in FIG. 10, the elevating control circuit of the present embodiment includes a first three-way switching valve 124 and a second three-way switching valve 126. In the following description, the three-way switching valves 124 and 126 are referred to.

The three-way switching valves 124 and 126 are electric switching valves that are switched and operated by being driven by a motor. The three-way switching valve 124 can switch between two positions, an ascending position in which the ports a and b communicate with each other and a descending position in which the ports b and c communicate with each other. Further, the three-way switching valve 126 can switch between two positions, an ascending position in which the ports b and c are communicated and a descending position in which the ports a and b are communicated.

A check valve 104 is provided in the piping from the hydraulic source 96, and the piping on the secondary side of the check valve 104 is connected to the ports a of the three-way switching valves 124 and 126. The port b of the three-way switching valve 124 is connected to the raising cylinder chamber 60a of the double-acting hydraulic cylinder 60-2, and the port b of the three-way switching valve 126 is connected to the lowering cylinder chamber 60b of the double-acting hydraulic cylinder 60-2. Will be done. Further, the ports c of the three-way switching valves 124 and 126 are commonly connected to the tank 98 side.

Further, as in the embodiment of FIG. 8, a relief valve 106 is connected between the pipes of the three-way switching valves 124 and 126 with respect to the ports a and c, and the double-acting hydraulic cylinder 60-2 is connected from the three-way switching valve 124. A parallel circuit of the flow control valve 108 and the check valve 110 is connected to the secondary side pipe connected to the ascending cylinder chamber 60a of the above, and further, for descending the double-acting hydraulic cylinder 60-2 from the three-way switching valve 126. A parallel circuit of the flow control valve 112 and the check valve 114 is also connected to the secondary side pipe connected to the cylinder chamber 60b.

(Control operation by elevating control circuit)
First, during normal monitoring, the three-way switching valves 124 and 126 are in the lowering position in which the ports b and c communicate with each other, and the raising cylinder chamber 60a and the lowering cylinder chamber 60b of the double-acting hydraulic cylinder 60-2. Are both communicated with the tank 98 side, and are in the descending stop position under the load pressure of the hose storage portion.

When the ascending operation is performed in this state, as shown in FIG. 10A, the three-way switching valve 124 is switched to the ascending position where the ports a and b communicate with each other, and the pressure oil from the hydraulic source 96 is transferred to the three-way switching valve 124 and the three-way switching valve 124. It is supplied to the ascending cylinder chamber 60a of the double-acting hydraulic cylinder 60-2 via the check valve 110, overcomes the load pressure due to the weight of the hose housing portion, and the piston starts ascending.

As the piston rises, the pressure oil in the lowering cylinder chamber 60b flows to the tank 98 side through the flow control valve 112 and the three-way switching valve 126, and at this time, the hose accommodating portion rises due to the piston due to the set flow rate flowing through the flow control valve 112. The speed is decided.

When the piston of the double-acting hydraulic cylinder 60-2 reaches the full stroke, the hose storage portion stops rising and is exposed on the observer passage, so that the fire can be extinguished by pulling out the hose with a nozzle. When the hose housing is stopped in the ascending position, the pressure oil is maintained in the ascending cylinder chamber 60a of the double-acting hydraulic cylinder 60-2 by keeping the three-way switching valve 124 in the ascending position, and the load pressure is increased. By obtaining a pushing force that exceeds, the hose storage portion is held in the ascending stop position.

When the fire extinguishing work is completed and the drained hose is stored in the hose storage portion and the lowering operation is performed, the three-way switching valve 124 switches to the lowering position in which the ports b and c communicate with each other, as shown in FIG. 10B. In addition, the three-way switching valve 126 is switched to a lowering position that allows the ports a and b to communicate with each other.

Therefore, pressure oil is supplied to the lowering cylinder chamber 60b of the double-acting hydraulic cylinder 60-2 via the three-way switching valve 126 and the check valve 114, and the ascending cylinder chamber 60a connects the flow control valve 108 and the three-way switching valve 124. The piston of the double-acting hydraulic cylinder 60-2 starts to descend due to the load pressure due to the oil pressure and the weight of the hose accommodating portion. As the piston descends, the pressure oil in the ascending cylinder chamber 60a flows to the tank 98 side through the flow rate control valve 108 and the three-way switching valve 124, and the lowering speed of the hose accommodating portion by the piston due to the set flow rate flowing through the flow rate control valve 108. It is decided.

When the piston of the double-acting hydraulic cylinder 60-2 strokes to the descending stop position, the hose storage portion is accommodated in the observer passage, and for example, the three-way switching valve 126 is ported to the port b by a signal of a detection switch or the like operating at the descending stop position. , C is switched to the ascending position where communication is performed, and this returns to the normal monitoring state.

[Elevation control circuit that hydraulically drives a single-acting cylinder]
11A and 11B are explanatory views showing an embodiment of an ascending / descending control circuit for hydraulically driving a single-acting cylinder, FIG. 11A shows ascending control, and FIG. 11B shows descending control.

The elevating control circuit of this embodiment uses a single-acting hydraulic cylinder 130 as a hydraulic actuator. One of the single-acting hydraulic cylinders 130 partitioned by the piston 131 is a cylinder chamber 130a, and the other cylinder chamber 130b is opened to the outside air and is provided with a spring 132 that returns the piston 131 to the initial position.

The single-acting hydraulic cylinder 130 strokes the piston 131 against the load pressure and the spring 132 by supplying pressure oil to the cylinder chamber 130a, and when the pressure oil in the cylinder chamber is drained to the tank side, the load pressure and It is stroked to the initial position by the force of the spring 132.

As shown in FIG. 11, the elevating control circuit of the present embodiment includes a three-way switching valve 140, and the three-way switching valve 140 is an electric switching valve that is switched and operated by a motor drive, and ports a and b are communicated with each other. It is possible to switch between the ascending position and the descending position where the ports b and c communicate with each other.

A check valve 104 is provided in the pipe from the hydraulic source 96, and the pipe on the secondary side of the check valve 104 is connected to the port a of the three-way switching valve 140. The port b of the three-way switching valve 140 is connected to the cylinder chamber 130a of the single-acting hydraulic cylinder 130, and the port c of the three-way switching valve 140 is connected to the tank 98 side.

Further, a relief valve 106 is connected between the pipes for the ports a and c on the primary side of the three-way switching valve 140, and each of the pipes for the ports a and c on the primary side of the three-way switching valve 140 is connected. Flow control valves 134 and 136 using a needle valve are provided.

Further, a series circuit of the pilot check valve 142 and the flow rate control valve 144 using the needle valve is connected to the pipe drawn from the cylinder chamber 130a of the single-acting hydraulic cylinder 130 to the tank 98 side.

(Control operation by elevating control circuit)
First, during normal monitoring, the three-way switching valve 140 is in the descending position where the ports b and c are communicated, and the cylinder chamber 130a of the single-acting hydraulic cylinder 130 is communicated with the tank 98 side, and the hose is stored. It is in the descending stop position due to the load pressure due to the weight of the part.

When the ascending operation is performed in this state, as shown in FIG. 11A, the three-way switching valve 140 is switched to the ascending position where the ports a and b communicate with each other, and the pressure oil from the hydraulic source 96 is transferred to the single-acting hydraulic cylinder 130. The piston 131 starts to rise by being supplied to the cylinder chamber 130a of the above and overcoming the load pressure due to the weight of the hose storage portion and the spring 132.

Flows into the cylinder side pressure oil from the hydraulic source 96 with increasing piston 131 through a flow control valve 134, the rising speed of the hose housing section by the piston 131 is determined by setting flow rate through the flow control valve 134.

When the piston 131 of the single-acting hydraulic cylinder 130 reaches the full stroke, the hose storage portion stops rising and is exposed on the observer passage, so that the fire extinguishing work can be performed by pulling out the hose with a nozzle. When the hose housing is stopped in the raised position, by keeping the three-way switching valve 140 in the raised position, the supply of pressure oil to the cylinder chamber 130a of the single-acting hydraulic cylinder 130 is maintained, and a pushing force exceeding the load pressure is applied. By obtaining it, the hose storage portion is held in the ascending stop position.

When the fire extinguishing work is completed and the drained hose is stored in the hose storage portion and the lowering operation is performed, the three-way switching valve 140 switches to the lowering position in which the ports b and c communicate with each other, as shown in FIG. 11B. Be done.

Therefore, the cylinder chamber 130a of the single-acting hydraulic cylinder 130 is communicated with the tank 98 side via the three-way switching valve 140, and the piston 131 of the single-acting hydraulic cylinder 130 receives the load pressure due to the weight of the hose storage portion and the load of the spring 132. Starts descending.

As the piston 131 descends, the pressure oil in the cylinder chamber 130a flows out to the tank 98 side through the three-way switching valve 140, and at this time, the descending speed of the hose accommodating portion by the piston 131 is determined by the set flow rate flowing through the flow rate control valve 136.

When the piston 131 of the single-acting hydraulic cylinder 130 strokes to the descending stop position, the hose storage portion is accommodated in the observer passage, and for example, the three-way switching valve 140 is ported to the port b, by a signal of a detection switch or the like operating at the descending stop position. Switch to the ascending position where c is communicated, thereby returning to normal monitoring.

On the other hand, when an impact force is applied to the piston 131 of the single-acting hydraulic cylinder 130 via the hose storage portion while the piston 131 of the single-acting hydraulic cylinder 130 is held in the ascending stop position, the oil pressure in the cylinder chamber 130a is temporarily applied. Increase to. In this case, when the increased oil pressure in the cylinder chamber 130a exceeds the set pressure of the pilot check valve 142, the pilot check valve 142 opens and the pressure oil that becomes the set flow rate of the flow rate control valve 144 flows to the tank 98 side. The impact force applied to the single-acting hydraulic cylinder 130 is alleviated, and abnormal high pressure is prevented from being applied to equipment such as the cylinder chamber 130a and the three-way switching valve 140.

[Elevation control circuit for hydraulic drive equipped with a four-way switching valve]
12A and 12B are explanatory views showing an embodiment of an ascending / descending control circuit for hydraulic drive using a four-way switching valve, FIG. 12A shows ascending control, and FIG. 12B shows descending control. ..

As shown in FIG. 12, the elevating control circuit of the present embodiment includes a four-way switching valve 150. The four-way switching valve 150 is an electric switching valve that is switched and operated by being driven by a motor. The four-way switching valve 150 can switch between two positions, an ascending position in which ports a and b and ports c and d are communicated, and a descending position in which ports b and c and ports d and a are communicated with each other. It is also called an X switching valve because of its arrangement.

A check valve 104 is provided in the piping from the hydraulic source 96, and the piping on the secondary side of the check valve 104 is connected to the port a of the four-way switching valve 150. The port b of the four-way switching valve 150 is connected to the ascending cylinder chamber 60a of the double-acting hydraulic cylinder 60-2, and the port c is connected to the descending cylinder chamber 60b of the double-acting hydraulic cylinder 60-2. Further, the port d of the four-way switching valve 150 is commonly connected to the tank 98 side.

Further, as in the embodiment of FIG. 8, a relief valve 106 is connected between the pipes of the four-way switching valve 150 with respect to the ports a and d, and the double-acting hydraulic cylinder 60- is connected from the port b of the four-way switching valve 150. A parallel circuit of the flow control valve 108 and the check valve 110 is connected to the secondary side pipe connected to the ascending cylinder chamber 60a of 2, and further, the double-acting hydraulic cylinder 60- is connected from the port c of the four-way switching valve 150. also connected secondary side piping 2 of the lowering cylinder chamber 60b, the parallel circuits of the flow control valve 112 and check valve 114 are connected.

(Control operation by elevating control circuit)
First, during normal monitoring, the four-way switching valve 150 is in the lowering position shown in FIG. 12B in which ports b and c and ports a and d are communicated with each other, and the double-acting hydraulic cylinder 60-2 is raised. Both the cylinder chamber 60a for lowering and the cylinder chamber 60b for lowering are separated from the hydraulic source 96 side, and are in the lowering stop position under the load pressure of the hose housing portion.

When the ascending operation is performed in this state, as shown in FIG. 12A, the four-way switching valve 150 is switched to the ascending position where the ports a and b and the ports c and d communicate with each other, and the pressure oil from the hydraulic source 96 is released. It is supplied to the ascending cylinder chamber 60a of the double-acting hydraulic cylinder 60-2 via the four-way switching valve 150 and the check valve 110, overcomes the load pressure due to the weight of the hose housing portion, and the piston starts ascending.

As the piston rises, the pressure oil in the lowering cylinder chamber 60b flows to the tank 98 side through the flow control valve 112 and the three-way switching valve 126, and at this time, the hose accommodating portion rises due to the piston due to the set flow rate flowing through the flow control valve 112. The speed is decided.

When the piston of the double-acting hydraulic cylinder 60-2 reaches the full stroke, the hose storage portion stops rising and is exposed on the observer passage, so that the fire can be extinguished by pulling out the hose with a nozzle. When the hose housing is stopped in the ascending position, by keeping the four-way switching valve 150 in the ascending position, the supply of pressure oil is maintained in the ascending cylinder chamber 60a of the double-acting hydraulic cylinder 60-2, and the load pressure is increased. By obtaining a pushing force that exceeds, the hose storage portion is held in the ascending stop position.

When the fire extinguishing work is completed and the drained hose is stored in the hose storage portion and the descent operation is performed, the four-way switching valve 150 sets the ports b, c and "ports d, a" as shown in FIG. 12 (B). It can be switched to the descending position to communicate.

Therefore, the ascending cylinder chamber 60a and the descending cylinder chamber 60b of the double-acting hydraulic cylinder 60-2 are in communication with each other via the ports b and c of the four-way switching valve 150. When the load pressure is applied, the piston under the load pressure starts to descend, and the pressure oil in the ascending cylinder chamber 60a flows through the path of the flow control valve 108 , the four-way switching valve 150, and the check valve 114. The lowering speed of the hose accommodating portion by the piston is determined by the set flow rate that flows to 60b and flows through the flow control valve 108 at this time.

When the piston of the double-acting hydraulic cylinder 60-2 strokes to the lowering stop position, the hose storage portion is housed in the observer passage, whereby the normal monitoring state is returned.

[Embodiment equipped with a pneumatically driven elevating mechanism]
FIG. 13 is an explanatory view showing the internal structure of the fire hydrant equipment using air pressure as the gas pressure as the driving source of the elevating mechanism in a cross section viewed from the road side.

(Structure of fire hydrant equipment)
As shown in FIG. 13, the hose accommodating portion 44 is supported by an elevating mechanism 46 so as to be able to elevate and elevate, and in the present embodiment, a pantograph mechanism is used as the elevating mechanism 46.

As the drive mechanism of the elevating mechanism 46, a piston cylinder mechanism driven by air pressure is provided, and the lower end of the double-acting pneumatic cylinder 260 that functions as a gas pressure cylinder is rotatably connected to the link arm 46b by a fulcrum 51a. The tip of the piston rod 263 connected to the piston 261 slidably provided in the kinematic pneumatic cylinder 260 is rotatably connected to the link arm 46a by the fulcrum 51b. Since the configuration other than the elevating mechanism 46 is the same as that of the embodiment of FIG. 3, the same reference numerals are given and the description thereof will be omitted.

A control mechanism storage unit 45 is arranged in the management passage 20 below the internal space in which the elevating mechanism 46 is arranged, and the control mechanism storage unit 45 supplies fire extinguishing water to the hose 54 of the hose storage unit 44. A water discharge control circuit for discharging water and an elevating control circuit for driving the elevating mechanism 46 up and down are provided.

A branch pipe 24a branched from the water supply main 24 that functions as a water pressure source is connected to the control mechanism storage unit 45, and fire extinguishing water (pressure water) supplied from the fire pump equipment to the water supply main 24 is introduced. ing.

The pipe 57 from the water discharge control circuit built in the control mechanism accommodating portion 45 is connected to the flexible joint 65 which is the hose connection port of the hose accommodating portion 44 via the connecting hose 62.

Further, a branch pipe 224a branched from the air pipe 224 that functions as an air pressure source is connected to the control mechanism storage unit 45, and the pressurized air supplied to the air pipe 224 from the pressurized air supply facility using a compressor. Has been introduced.

The air pipe 226 from the boost control circuit built in the control mechanism accommodating portion 45 is connected to the cylinder chamber of the double acting pneumatic cylinder 260 via an air hose 228. The air hose 228 has a hose length having a sufficient margin for movement when the hose storage portion 44 is pushed up from the fire hydrant elevating port 42 of the observer passage 14 by the elevating mechanism 46 to be exposed, and the hose storage portion 44 moves up and down. Even if it operates, the hose storage portion 44 can move without the air hose 228 coming off.

(Elevation control circuit)
FIG. 14 is an explanatory diagram showing an embodiment of an elevating control circuit for pneumatic drive together with a water discharge control circuit.

As shown in FIG. 14, the elevating control circuit 266 includes a first three-way switching valve 282 and a second three-way switching valve 284. In the following description, it is referred to as a three-way switching valve 282, 284.

The three-way switching valves 282 and 284 are electric switching valves that are switched and operated by being driven by a motor. The three-way switching valve 282 can switch between two positions, an ascending position in which the ports a and b communicate with each other and a descending position in which the ports b and c communicate with each other. Further, the three-way switching valve 284 can switch between two positions, an ascending position in which the ports b and c communicate with each other and a descending position in which the ports a and b communicate with each other.

A check valve 278 is provided in the branch pipe 224a drawn from the air pipe 224 which is an air pressure source, followed by an automatic pressure regulating valve 280. The check valve 278 closes when the air pressure on the air pipe 224 side drops to prevent the backflow of pressurized air. The automatic pressure regulating valve 280 controls the pressure of the pressurized air supplied to the cylinder side to a predetermined pressure. A constant flow rate valve may be used instead of the automatic pressure regulating valve 280.

The secondary side of the automatic pressure regulating valve 280 is connected to the port a of the three-way switching valves 282 and 284. The port b of the three-way switching valve 282 is connected to the raising cylinder chamber 260a of the double-acting pneumatic cylinder 260, and the port b of the three-way switching valve 284 is connected to the lowering cylinder chamber 260b of the double-acting pneumatic cylinder 260. Furthermore, the port c of the three-way valve 282 and 284 is connected to the exhaust side.

A parallel circuit of the flow control valve 286 and the check valve 288 is connected to the secondary side pipe connected from the three-way switching valve 282 to the raising cylinder chamber 260a of the double-acting pneumatic cylinder 260, and from the three-way switching valve 284. to double-acting pneumatic secondary pipe connected to a lowering cylinder chamber 260b of the cylinder 260, a parallel circuit of the flow control valve 290 and check valve 292 are connected.

The flow rate control valve 290 controls the flow rate of the pressurized air discharged from the lowering cylinder chamber 260b when the double-acting pneumatic cylinder 260 is driven up to a set flow rate, thereby increasing the ascending speed of the hose housing portion 44 by the piston 261. It is controlled to a predetermined speed.

The flow rate control valve 286 controls the flow rate of the pressurized air discharged from the ascending cylinder chamber 260a when the double-acting pneumatic cylinder 260 is driven downward to a set flow rate, thereby reducing the lowering speed of the hose housing portion 44 by the piston 261. It is controlled to a predetermined speed.

(Control operation by elevating control circuit)
First, during normal monitoring, as shown in FIG. 14, the three-way switching valves 282 and 284 are in the switching positions where the ports b and c are communicated with each other, and the cylinder chamber 260a for raising the double-acting pneumatic cylinder 260 and the cylinder chamber 260a are located. lowering cylinder chamber 260b is communicated with the both exhaust side, located in the lowermost stop position under the load pressure due to the weight of the hose receiving portion 44, thereby accommodating the hose housing section 44 in the monitoring personnel passage 14.

When the ascending operation is performed in this state, the three-way switching valve 282 switches to the ascending position in which the ports a and b communicate with each other, and pressurized air is supplied to the ascending cylinder chamber 260a of the double-acting pneumatic cylinder 260, and the hose accommodating portion 44 The piston 261 starts to rise by overcoming the load pressure due to the weight. Pressurized air descending cylinder chamber 260b with the rise of the piston 261 through the three-way valve 284 flows into exhaust side, the rising speed of the hose receiving portion 44 by the piston 261 by setting the flow rate through this when the flow control valve 290 Is decided.

When the piston 261 reaches the full stroke, the hose storage portion 44 stops rising and is exposed on the observer passage 14, so that the fire can be extinguished by pulling out the hose with a nozzle. In the state where the hose storage portion 44 is stopped in the ascending position, the supply of pressurized air to the ascending cylinder chamber 260a of the double-acting pneumatic cylinder 260 is maintained by keeping the three-way switching valve 282 in the ascending position, and the piston 261 By obtaining a pushing force that exceeds the load pressure, the hose storage portion 44 is held in the ascending stop position.

Further, if the air pressure on the air pipe 224 side temporarily drops while the hose storage portion 44 is held in the ascending stop position, the check valve 278 is closed to prevent the pressure drop on the cylinder side. The hose storage portion 44 can be stably held in the ascending stop position.

When the fire extinguishing work is completed and the hose is drained and stored in the hose storage unit 44, when the lowering operation is performed, the three-way switching valve 282 is switched to the lowering position where the ports b and c communicate with each other, and the three-way switching valve 282 is switched to the lowering position. The switching valve 284 is switched to a lowering position that allows the ports a and b to communicate with each other.

Thus pressurized air via a three-way valve 284 is supplied to the lowering cylinder chamber 260b double-acting pneumatic cylinder 260, increasing cylinder chamber 260a is communicated with the exhaust side via a three-way valve 282, pressurizing piston 261 starts to descend by receiving the weight due to the load pressure of the air pressure and the hose receiving portion 44 of the air. Pressurized air rising cylinder chamber 260a with the downward movement of the piston 261 through the three-way valve 282 flows into exhaust side, the lowering speed of the hose receiving portion 44 by the piston 261 by setting the flow rate through the flow control valve 286 at this time Is decided.

When the piston 261 strokes to the descending stop position, the hose accommodating portion 44 is accommodated in the observer passage 14, and the ports b and c of the three-way switching valve 284 are communicated with each other by a signal such as a detection switch operating at the descending stop position. It is switched to the ascending position, which returns to normal monitoring.

Since the configuration and operation of the water discharge control circuit 64 shown in FIG. 14 are the same as those in the embodiment of FIG. 6, the same reference numerals are given and the description thereof is omitted.

Further, as the elevating control circuit 266 using the air pressure as the drive source, the elevating control circuit for hydraulic drive shown in FIGS. 8 to 12 also uses the air pressure shown in FIG. 14 as the drive source corresponding to FIG. Similar to the elevating control circuit, it can be an elevating control circuit using air pressure as a drive source.

Further, FIGS. 13 and 14 take as an example an elevating mechanism using an air pressure as a driving source as the gas pressure, but the present invention is not limited to this, and the elevating mechanism using the gas pressure of an inert gas such as nitrogen gas as the driving source is used as the gas pressure. It may be a mechanism. In the case of an elevating mechanism that uses gas pressure as a drive source, for example, a gas pressure supply facility using a gas cylinder is installed in the management passage, and a control mechanism storage unit of the fire hydrant facility is installed from the gas pressure supply facility by a gas pressure supply pipe. Gas pressure is supplied to the elevator to operate the elevating mechanism.

[Modification of the present invention]
(Elevation control circuit)
In the above-described embodiment, in the ascending / descending control using the double-acting cylinders shown in FIGS. 6, 8, 9 and 10, pressure water or pressure oil is supplied to the descending cylinder chamber even during the descending control, and the water pressure or The piston is driven downward by the load pressure due to the oil pressure and the weight of the hose housing, but the present invention is not limited to this. For example, as in the embodiment of FIG. 12, in the lowering control, the raising cylinder chamber and the lowering cylinder chamber of the double-acting cylinder are communicated with each other by a three-way switching valve or a direction switching valve, and only by the load pressure due to the weight of the hose housing portion. The piston may be driven downward.

(Fire hydrant storage)
In the above-mentioned fire hydrant equipment, the hose storage portion is supported by an elevating mechanism so as to be able to elevate, but the present invention is not limited to this. For example, even when a fire extinguisher storage unit is provided integrally with the hose storage unit to store the fire extinguisher and the fire extinguisher is used, the fire extinguisher storage unit is exposed on the observer passage integrally with the hose storage unit by the elevating mechanism. You may try to raise it to the position.

Therefore, in the event of a vehicle accident accompanied by a fire, the fire extinguisher storage unit housed in the observer passage is raised by the elevating mechanism together with the hose storage unit and exposed on the road surface of the observer passage, and the fire extinguisher is extinguished. The fire can be extinguished by simply and easily taking it out from the fire extinguisher storage portion exposed on the observer passage without requiring the opening operation of the door.

(Elevating mechanism)
The above embodiment exemplifies, but is not limited to, an elevating mechanism for directly elevating and lowering the hose accommodating portion by a hydraulic cylinder. For example, another mechanism driven by a hydraulic cylinder or a hydraulic cylinder, for example, a pantograph type elevating mechanism may be used.

(Fire hydrant device)
The hoses of the fire hydrant equipment, valves such as the fire hydrant valve, the configuration and arrangement of the notification device, and other configurations shown in the above embodiment are arbitrary, and an appropriate configuration may be adopted.

(others)
Further, 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: Tunnel 12: Tunnel wall surface 14: Observer passage 15: Road 16: Fire hydrant equipment 18: Floor slab 20: Management passage 22: Duct 24: Water supply main 24a: Branch pipe 26: Fire hydrant panel 28: Notification device panel 36a : Up switch 36b: Down switch 38a: Water discharge switch 38b: Water discharge stop switch 42: Fire hydrant lift 44: Hose storage 45: Control mechanism storage 46: Lift mechanism 48: Housing 50: Road plate 54: Hose 55: Hose Outlet 56: Nozzle 60-1: Double-acting hydraulic cylinder 60-2: Double-acting hydraulic cylinder 60a , 260a : Ascending cylinder chamber 60b , 260b : Lowering cylinder chamber 62: Connecting hose 65: Flexible joint 64: Water discharge control circuit 66 , 266 : Lifting control circuit 70, 78, 88, 92 , 104, 110, 114, 120, 278, 288, 292: Check valve 72: Remote fire hydrant valve 74: Test drain valve 76 , 80, 280 : Automatic Pressure regulating valve 82 , 84, 124, 126, 140, 286, 290: Three-way switching valve 86, 90, 108, 112, 134, 136, 144: Flow control valve 100: Direction control valve 106, 122: Relief valve 116: Counter Balance valve 118, 142: Pilot check valve
130: Single-acting hydraulic cylinder 150: Four-way switching valve 224,226: Air piping 228: Air hose 260: Double-acting pneumatic cylinder

Claims (30)

A hose housing section housing a hose with a nozzle, said a lifting mechanism for lifting the hose storage unit, fire hydrant apparatus comprising a lifting control circuit for controlling the lifting mechanism, wherein when not using the hydrant hose housing section Is housed in the observer passage in the tunnel, and when the fire hydrant is used, the hose storage part is installed in the fire hydrant equipment in the tunnel so as to be raised and held at an exposed position on the road surface of the observer passage. At
The elevating mechanism includes a hydraulic actuator that elevates and elevates the hose accommodating portion.
When the fire hydrant is used, the elevating control circuit controls the hydraulic pressure with respect to the hydraulic actuator so as to raise the hose accommodating portion to the exposed position, and when the fire hydrant is stored in the observer passage. The hydraulic pressure with respect to the hydraulic actuator is controlled so as to lower the hose accommodating portion to the accommodating position .
Fire hydrant equipment in the tunnel, which is characterized by this.
In the fire hydrant equipment in the tunnel according to claim 1.
The hydraulic actuator is a double-acting cylinder that slides the piston in both directions by switching between the supply of pressure water from the hydraulic source and the discharge of pressure water to the drain side to the ascending cylinder chamber and the descending cylinder chamber. ,
The elevating control circuit includes a first three-way switching valve and a second three-way switching valve.
The first three-way switching valve can switch between an ascending position and a descending position, supplies pressure water to the ascending cylinder chamber of the double-acting cylinder at the ascending position, and ascends at the descending position. Drain the pressure water in the cylinder chamber for
The second three-way switching valve can switch between an ascending position and a descending position, discharges pressure water from the lowering cylinder chamber of the double-acting cylinder at the ascending position, and causes the descending at the descending position. Supply pressure water to the cylinder chamber,
Fire hydrant equipment in the tunnel, which is characterized by this.
In the fire hydrant equipment in the tunnel according to claim 2.
The elevating control circuit further
The primary side of the pipe pressure water is supplied from the hydraulic source to the first three-way valve and the second three-way valve comprises a constant flow valve or an automatic pressure regulating valve for supplying a predetermined constant flow rate ,
From the first three-way switching valve to the ascending cylinder chamber of the double-acting cylinder and from the second three-way switching valve to each of the secondary-side pipes connected to the descending cylinder chamber of the double-acting cylinder. a check valve to prevent discharge of pressurized water from said double acting cylinder side as well as allows the supply of pressurized water to the double acting cylinder side, from the double acting cylinder side is the pressure water discharged to the drain side with a parallel circuit of a flow rate control valve for adjusting the flow rate,
Fire hydrant equipment in the tunnel, which is characterized by this.
In the fire hydrant equipment in the tunnel according to claim 1.
The hydraulic actuator is a double-acting cylinder that slides the piston in both directions by switching between the supply of pressure oil from the hydraulic source and the discharge of pressure oil to the tank side to the ascending cylinder chamber and the descending cylinder chamber. ,
The elevating control circuit includes a directional control valve.
The directional control valve can switch between an ascending position, a neutral position, and a descending position, and at the neutral position , supply and discharge of pressure oil to the ascending cylinder chamber and the descending cylinder chamber of the double-acting cylinder. and the separation from the hydraulic source and the tank side so that it can not, to discharge the pressure oil of Rutotomoni the lowering cylinder chamber to supply pressurized fluid to the elevating cylinder chamber of the double acting cylinder in said raised position, said descending position to discharge the pressure oil of the to supply pressure oil to the lowering cylinder chamber of the double acting cylinder Rutotomoni the raising cylinder chamber,
Fire hydrant equipment in the tunnel, which is characterized by this.
In the fire hydrant equipment in the tunnel according to claim 4.
The elevating control circuit further
The first primary pipe pressure oil is supplied from the hydraulic source to the directional control valve, comprising a check valve for preventing back flow of pressure oil to the hydraulic source,
Between the tank return pipe being connected to the tank side to the primary side of the directional control valve side piping section than the check valve of the pipe from the direction control valve, from the hydraulic source to the directional control valve Equipped with a relief valve that controls the supplied pressure oil to a predetermined pressure
The supply of pressure oil to the double-acting cylinder side is allowed to each of the secondary-side pipes connected from the directional control valve to the ascending cylinder chamber and the descending cylinder chamber of the double-acting cylinder, and the above-mentioned a check valve for preventing the discharge of pressurized oil from the double acting cylinder side, with a parallel circuit of a flow rate control valve for adjusting the flow rate of the hydraulic fluid discharged from said double acting cylinder side to the tank side,
Fire hydrant equipment in the tunnel, which is characterized by this.
In the fire hydrant equipment in the tunnel according to claim 1.
The hydraulic actuator is a double-acting cylinder that slides the piston in both directions by switching between the supply of pressure oil from the hydraulic source and the discharge of pressure oil to the tank side to the ascending cylinder chamber and the descending cylinder chamber. ,
The elevating control circuit includes a directional control valve.
The directional control valve can switch between an ascending position, a neutral position, and a descending position, and cannot supply pressure oil to the ascending cylinder chamber and the descending cylinder chamber of the double-acting cylinder at the neutral position. wherein the elevating cylinder chamber and the descending cylinder chamber with disconnected from the hydraulic pressure source is communicated to the tank side, Rutotomoni said to supply pressure oil to the rising cylinder chamber of the double acting cylinder in said raised position as is discharged pressurized oil lowering cylinder chamber, is discharged pressurized fluid of the to supply pressure oil to the lowering cylinder chamber of the double acting cylinder Rutotomoni the elevating cylinder chamber by the lowered position,
In addition
When the pressure oil discharged from the raising cylinder chamber side to the tank side exceeds a predetermined pressure in the secondary side piping connected from the directional control valve to the raising cylinder chamber of the double acting cylinder. The counter balance valve that is opened and
Connected in series with the counterbalance valve, the pressure oil predetermined pressure is discharged into the tank from the rising cylinder chamber side as well as preventing the leakage oil from the counter balance valve to the tank at the neutral position A pilot check valve that opens when the pressure is exceeded,
Fire hydrant equipment in the tunnel, which is characterized by being equipped with.
In the fire hydrant equipment in the tunnel according to claim 6.
The elevating control circuit further
The first primary pipe pressure oil is supplied from the hydraulic source to the directional control valve, comprising a check valve for preventing back flow of pressure oil to the hydraulic source,
Between the tank return pipe being connected to the tank side to the primary side of the directional control valve side piping section than the check valve of the pipe from the direction control valve, from the hydraulic source to the directional control valve Equipped with a relief valve that controls the supplied pressure oil to a predetermined pressure
The supply of pressure oil to the double-acting cylinder side is allowed to each of the secondary-side pipes connected from the directional control valve to the ascending cylinder chamber and the descending cylinder chamber of the double-acting cylinder, and the above-mentioned a check valve for preventing the discharge of pressurized oil from the double acting cylinder side, with a parallel circuit of the flow control valve for adjusting the flow rate of the hydraulic fluid discharged from said double acting cylinder side to the tank side,
Fire hydrant equipment in the tunnel, which is characterized by this.
In the fire hydrant equipment in the tunnel according to claim 1.
The hydraulic actuator is a double-acting cylinder that slides the piston in both directions by switching between the supply of pressure oil from the hydraulic source and the discharge of pressure oil to the tank side to the ascending cylinder chamber and the descending cylinder chamber. ,
The elevating control circuit includes a first three-way switching valve and a second three-way switching valve.
The first three-way switching valve can switch between an ascending position and a descending position, supplies pressure oil to the ascending cylinder chamber of the double-acting cylinder at the ascending position, and ascends at the descending position. Drain the pressure oil in the cylinder chamber for
The second three-way switching valve can switch between an ascending position and a descending position, discharges pressure oil from the lowering cylinder chamber of the double-acting cylinder at the ascending position, and causes the descending at the descending position. you supply the pressurized oil to use the cylinder chamber,
Fire hydrant equipment in the tunnel, which is characterized by this.
In the fire hydrant equipment in the tunnel according to claim 8.
The elevating control circuit further
Said first primary-side pressure oil from the hydraulic source to the three-way switching valve and the second three-way valve is a supply pipe, a check valve to prevent back flow of pressure oil to the hydraulic source Prepare ,
The primary side of the from the check valve of the pipe first three-way valve and the second of the three-way switching valve side piping section first three-way valve and the tank-side from the second three-way valve between the tank return pipe being connected to, it comprises a relief valve for controlling the pressure oil to a predetermined pressure supplied from the hydraulic source to the first three-way valve and the second three-way valve,
From the first three-way switching valve to the ascending cylinder chamber of the double-acting cylinder and from the second three-way switching valve to each of the secondary-side pipes connected to the descending cylinder chamber of the double-acting cylinder. a check valve which prevents the discharge of hydraulic fluid from said double acting cylinder side as well as allows the supply of pressure oil to the double acting cylinder side, from the double acting cylinder side of the pressure oil is discharged to the tank Equipped with a parallel circuit with a flow control valve that adjusts the flow rate,
Fire hydrant equipment in the tunnel, which is characterized by this.
In the fire hydrant equipment in the tunnel according to claim 1.
Said hydraulic actuator, the piston is toward selfish slide on one side by the supply of pressure oil from the hydraulic source to the cylinder chamber, the more the piston spring in a state of being discharged pressure oil to the tank side from the cylinder chamber a single acting cylinder for countercurrent selfish slide on the other side,
The elevating control circuit includes a three-way switching valve.
The three-way valve is capable of switching two positions of the raised and lowered positions, to supply pressure oil to the cylinder chamber before Symbol single-acting cylinder in said raised position, pressurized oil from the cylinder chamber in the lowered position To discharge
Fire hydrant equipment in the tunnel, which is characterized by this.
In the fire hydrant equipment in the tunnel according to claim 10.
The elevating control circuit further
The primary side of the piping pressure oil is supplied from the hydraulic source to the three-way valve, comprising a check valve for preventing back flow of pressure oil to the hydraulic source,
Between the tank return pipe being connected to said tank from said primary side than the check valve of the piping of the three-way valve side piping section and the three-way valve, from the hydraulic pressure source to said three-way valve Equipped with a relief valve that controls the supplied pressure oil to a predetermined pressure
The piping portion on the three-way switching valve side from the check valve of the piping on the primary side is provided with a first flow rate control valve capable of adjusting the flow rate of the pressure oil supplied from the hydraulic source to the single-acting cylinder side. ,
Wherein the tank return pipe, the flow rate of the hydraulic fluid discharged to the tank side from the single-acting cylinder-side with a second flow control valve adjustable,
Fire hydrant equipment in the tunnel, which is characterized by this.
In the in-tunnel fire hydrant equipment according to claim 10 or 11.
The elevating control circuit further
A pilot check valve that opens when the oil pressure on the single-acting cylinder side exceeds a predetermined pressure and a pressure that flows to the tank side through the pilot check valve in a pipe that communicates from the cylinder chamber to the tank side. Fire hydrant equipment in a tunnel characterized by having a series circuit with a flow control valve that regulates the flow rate of oil.
In the fire hydrant equipment in the tunnel according to claim 1.
The hydraulic actuator is a double-acting cylinder that slides the piston in both directions by switching between the supply of pressure oil from the hydraulic source and the discharge of pressure oil to the tank side to the ascending cylinder chamber and the descending cylinder chamber. ,
The elevating control circuit includes a four-way switching valve.
The four-way switching valve can switch between an ascending position and a descending position, and at the ascending position, the pressure oil is supplied to the ascending cylinder chamber of the double-acting cylinder and the pressure oil in the lowering cylinder chamber is supplied. The piston is discharged and the piston is lowered by the load pressure due to the weight of the hose accommodating portion by communicating the raising cylinder chamber and the lowering cylinder chamber at the lowering position.
Fire hydrant equipment in the tunnel, which is characterized by this.
In the in-tunnel fire hydrant equipment according to claim 13.
The elevating control circuit further
The first primary pipe pressure oil is supplied from the hydraulic source to the four-way switching valve, comprising a check valve for preventing back flow of pressure oil to the hydraulic source,
Between the tank return pipe being connected to the tank side to the primary side of the four-way switching valve side piping section than the check valve of the piping from the four-way switching valve, from the hydraulic source to the four-way switching valve Equipped with a relief valve that controls the supplied pressure oil to a predetermined pressure
Each of the secondary side pipes connected from the four-way switching valve to the ascending cylinder chamber and the descending cylinder chamber of the double-acting cylinder is allowed to supply pressure oil to the double-acting cylinder side, and the above-mentioned a check valve for preventing the discharge of pressurized oil from the double acting cylinder side, with a parallel circuit of a flow rate control valve for adjusting the flow rate of the hydraulic fluid discharged to the tank side from said double acting cylinder side,
Fire hydrant equipment in the tunnel, which is characterized by this.
A hose housing section housing a hose with a nozzle, said a lifting mechanism for lifting the hose storage unit, fire hydrant apparatus comprising a lifting control circuit for controlling the lifting mechanism, wherein when not using the hydrant hose housing section Is housed in the observer passage in the tunnel, and when the fire hydrant is used, the hose storage part is installed in the fire hydrant equipment in the tunnel so as to be raised and held at an exposed position on the road surface of the observer passage. At
The elevating mechanism includes a gas pressure actuator that elevates and elevates the hose accommodating portion.
The elevating control circuit controls the gas pressure with respect to the gas pressure actuator so as to raise the hose accommodating portion to the exposed position when using the fire hydrant, and when accommodating the fire hydrant in the observer passage . The gas pressure with respect to the gas pressure actuator is controlled so as to lower the hose storage portion to the storage position .
Fire hydrant equipment in the tunnel, which is characterized by this.
A hose storage unit that stores a hose with a nozzle, an elevating mechanism that raises and lowers the hose storage unit, and an elevating control circuit that controls the elevating mechanism are provided. In a tunnel fire hydrant device that is housed in an observer passage and is installed so that the hose storage portion is raised and held at an exposed position on the road surface of the observer passage when a fire hydrant is used.
The elevating mechanism includes a hydraulic actuator that elevates and elevates the hose accommodating portion.
When the fire hydrant is used in the installed state, the elevating control circuit controls the hydraulic pressure with respect to the hydraulic actuator so as to raise the hose storage portion to the exposed position, and the fire hydrant is placed in the observer passage in the installed state. The hydraulic pressure with respect to the hydraulic actuator is controlled so as to lower the hose accommodating portion to the accommodating position.
A fire hydrant device in a tunnel.
In the in-tunnel fire hydrant device according to claim 16.
The hydraulic actuator is a piston by switching between supplying pressure water from a hydraulic source connected to the ascending cylinder chamber and the descending cylinder chamber in the installed state and discharging pressure water to the drain side connected in the installed state. Is a double-acting cylinder that slides in both directions.
The elevating control circuit includes a first three-way switching valve and a second three-way switching valve.
The first three-way switching valve can switch between an ascending position and a descending position, supplies pressure water to the ascending cylinder chamber of the double-acting cylinder at the ascending position, and ascends at the descending position. Drain the pressure water in the cylinder chamber for
The second three-way switching valve can switch between an ascending position and a descending position, discharges pressure water from the lowering cylinder chamber of the double-acting cylinder at the ascending position, and causes the descending at the descending position. Supply pressure water to the cylinder chamber,
A fire hydrant device in a tunnel.
In the in-tunnel fire hydrant device according to claim 17.
The elevating control circuit further
The first three-way switching valve and the second three-way switching valve are provided with a constant flow rate valve or an automatic pressure regulating valve that supplies a predetermined constant flow rate to the piping on the primary side where the pressure water from the water pressure source is supplied. ,
From the first three-way switching valve to the ascending cylinder chamber of the double-acting cylinder and from the second three-way switching valve to each of the secondary-side pipes connected to the descending cylinder chamber of the double-acting cylinder. A check valve that allows the supply of pressure water to the double-acting cylinder side and prevents the discharge of pressure water from the double-acting cylinder side, and the pressure water discharged from the double-acting cylinder side to the drain side. Equipped with a parallel circuit with a flow control valve that adjusts the flow rate,
A fire hydrant device in a tunnel.
In the in-tunnel fire hydrant device according to claim 16.
The hydraulic actuator is a piston by switching between supply of pressure oil from a hydraulic source connected to the ascending cylinder chamber and lowering cylinder chamber in the installed state and discharging of pressure oil to the tank side connected in the installed state. Is a double-acting cylinder that slides in both directions.
The elevating control circuit includes a directional control valve.
The directional control valve can switch between an ascending position, a neutral position, and a descending position, and at the neutral position, supply and discharge of pressure oil to the ascending cylinder chamber and the descending cylinder chamber of the double-acting cylinder. It is separated from the hydraulic source and the tank side so that the pressure oil cannot be supplied, and the pressure oil in the ascending cylinder chamber of the double-acting cylinder is supplied and the pressure oil in the lowering cylinder chamber is discharged at the ascending position. To supply the pressure oil to the lowering cylinder chamber of the double-acting cylinder and to discharge the pressure oil from the ascending cylinder chamber.
A fire hydrant device in a tunnel.
In the in-tunnel fire hydrant device according to claim 19.
The elevating control circuit further
A check valve for preventing the backflow of the pressure oil to the hydraulic source is provided in the primary side pipe to which the pressure oil from the hydraulic source is supplied to the directional control valve.
From the hydraulic source to the directional control valve between the piping portion on the directional control valve side and the tank return pipe connected from the directional control valve to the tank side from the check valve of the primary side pipe. Equipped with a relief valve that controls the supplied pressure oil to a predetermined pressure
The supply of pressure oil to the double-acting cylinder side is allowed to each of the secondary-side pipes connected from the directional control valve to the ascending cylinder chamber and the descending cylinder chamber of the double-acting cylinder, and the above-mentioned A check valve for blocking the discharge of pressure oil from the double-acting cylinder side and a flow control valve for adjusting the flow rate of the pressure oil discharged from the double-acting cylinder side to the tank side are provided.
A fire hydrant device in a tunnel.
In the in-tunnel fire hydrant device according to claim 16.
The hydraulic actuator is a piston by switching between supply of pressure oil from a hydraulic source connected to the ascending cylinder chamber and lowering cylinder chamber in the installed state and discharging of pressure oil to the tank side connected in the installed state. Is a double-acting cylinder that slides in both directions.
The elevating control circuit includes a directional control valve.
The directional control valve can switch between an ascending position, a neutral position, and a descending position, and cannot supply pressure oil to the ascending cylinder chamber and the descending cylinder chamber of the double-acting cylinder at the neutral position. As described above, the ascending cylinder chamber and the descending cylinder chamber are communicated with the tank side while being separated from the hydraulic source, and the pressure oil is supplied to the ascending cylinder chamber of the double-acting cylinder at the ascending position and the descending is performed. The pressure oil in the cylinder chamber is discharged, the pressure oil is supplied to the lowering cylinder chamber of the double-acting cylinder at the lowering position, and the pressure oil in the ascending cylinder chamber is discharged.
In addition
When the pressure oil discharged from the raising cylinder chamber side to the tank side exceeds a predetermined pressure in the secondary side piping connected from the directional control valve to the raising cylinder chamber of the double acting cylinder. The counter balance valve that is opened and
It is connected in series to the counter balance valve to prevent oil leaking from the counter balance valve to the tank side at the neutral position, and the pressure oil discharged from the rising cylinder chamber side to the tank side exerts a predetermined pressure. A pilot check valve that opens when the pressure is exceeded,
A fire hydrant device in a tunnel, which is characterized by being equipped with.
In the in-tunnel fire hydrant device according to claim 21,
The elevating control circuit further
A check valve for preventing the backflow of the pressure oil to the hydraulic source is provided in the primary side pipe to which the pressure oil from the hydraulic source is supplied to the directional control valve.
From the hydraulic source to the directional control valve between the piping portion on the directional control valve side and the tank return pipe connected from the directional control valve to the tank side from the check valve of the primary side pipe. Equipped with a relief valve that controls the supplied pressure oil to a predetermined pressure
The supply of pressure oil to the double-acting cylinder side is allowed to each of the secondary-side pipes connected from the directional control valve to the ascending cylinder chamber and the descending cylinder chamber of the double-acting cylinder, and the above-mentioned A check valve for blocking the discharge of pressure oil from the double-acting cylinder side and a flow control valve for adjusting the flow rate of the pressure oil discharged from the double-acting cylinder side to the tank side are provided in parallel.
A fire hydrant device in a tunnel.
In the in-tunnel fire hydrant device according to claim 16.
The hydraulic actuator is a piston by switching between supply of pressure oil from a hydraulic source connected to the ascending cylinder chamber and lowering cylinder chamber in the installed state and discharging of pressure oil to the tank side connected in the installed state. Is a double-acting cylinder that slides in both directions.
The elevating control circuit includes a first three-way switching valve and a second three-way switching valve.
The first three-way switching valve can switch between an ascending position and a descending position, supplies pressure oil to the ascending cylinder chamber of the double-acting cylinder at the ascending position, and ascends at the descending position. Drain the pressure oil in the cylinder chamber for
The second three-way switching valve can switch between an ascending position and a descending position, discharges pressure oil from the lowering cylinder chamber of the double-acting cylinder at the ascending position, and causes the descending at the descending position. Supplying pressure oil to the cylinder chamber,
A fire hydrant device in a tunnel.
In the in-tunnel fire hydrant device according to claim 23.
The elevating control circuit further
A check valve that prevents the backflow of the pressure oil to the hydraulic source is provided in the piping on the primary side where the pressure oil from the hydraulic source is supplied to the first three-way switching valve and the second three-way switching valve. Prepare,
From the check valve of the primary side pipe to the piping portion on the side of the first three-way switching valve and the second three-way switching valve, the first three-way switching valve, and the second three-way switching valve to the tank side. A relief valve for controlling the pressure oil supplied from the hydraulic source to a predetermined pressure is provided in the first three-way switching valve and the second three-way switching valve between the tank return pipe connected to the tank return pipe.
From the first three-way switching valve to the ascending cylinder chamber of the double-acting cylinder and from the second three-way switching valve to each of the secondary-side pipes connected to the descending cylinder chamber of the double-acting cylinder. A check valve that allows the supply of pressure oil to the double-acting cylinder side and prevents the pressure oil from being discharged from the double-acting cylinder side, and the pressure oil that is discharged from the double-acting cylinder side to the tank side. Equipped with a parallel circuit with a flow control valve that adjusts the flow rate,
A fire hydrant device in a tunnel.
In the in-tunnel fire hydrant device according to claim 16.
The hydraulic actuator slides the piston toward one side by supplying pressure oil from a hydraulic source connected to the cylinder chamber in the installed state, and the tank side to which the pressure oil is connected from the cylinder chamber in the installed state. It is a single-acting cylinder that slides the piston toward the other side by a spring in the state of being discharged to the other side.
The elevating control circuit includes a three-way switching valve.
The three-way switching valve can switch between an ascending position and a descending position. At the ascending position, pressure oil is supplied to the cylinder chamber of the single-acting cylinder, and at the descending position, pressure oil is supplied from the cylinder chamber. To discharge
A fire hydrant device in a tunnel.
In the in-tunnel fire hydrant device according to claim 25.
The elevating control circuit further
The primary side pipe to which the pressure oil from the hydraulic source is supplied to the three-way switching valve is provided with a check valve for preventing the backflow of the pressure oil to the hydraulic source.
From the hydraulic source to the three-way switching valve between the piping portion on the three-way switching valve side and the tank return pipe connected from the three-way switching valve to the tank side from the check valve of the primary side pipe. Equipped with a relief valve that controls the supplied pressure oil to a predetermined pressure
The piping portion on the three-way switching valve side from the check valve of the piping on the primary side is provided with a first flow rate control valve capable of adjusting the flow rate of the pressure oil supplied from the hydraulic source to the single-acting cylinder side. ,
The tank return pipe is provided with a second flow rate control valve capable of adjusting the flow rate of the pressure oil discharged from the single-acting cylinder side to the tank side.
A fire hydrant device in a tunnel.
In the in-tunnel fire hydrant device according to claim 25 or 26.
The elevating control circuit further
A pilot check valve that opens when the oil pressure on the single-acting cylinder side exceeds a predetermined pressure and a pressure that flows to the tank side through the pilot check valve in a pipe that communicates from the cylinder chamber to the tank side. A fire hydrant device in a tunnel characterized by having a series circuit with a flow control valve that regulates the flow rate of oil.
In the in-tunnel fire hydrant device according to claim 16.
The hydraulic actuator is a piston by switching between supply of pressure oil from a hydraulic source connected to the ascending cylinder chamber and lowering cylinder chamber in the installed state and discharging of pressure oil to the tank side connected in the installed state. Is a double-acting cylinder that slides in both directions.
The elevating control circuit includes a four-way switching valve.
The four-way switching valve can switch between an ascending position and a descending position, and at the ascending position, the pressure oil is supplied to the ascending cylinder chamber of the double-acting cylinder and the pressure oil in the lowering cylinder chamber is supplied. The piston is discharged and the piston is lowered by the load pressure due to the weight of the hose accommodating portion by communicating the raising cylinder chamber and the lowering cylinder chamber at the lowering position.
A fire hydrant device in a tunnel.
In the in-tunnel fire hydrant device according to claim 28.
The elevating control circuit further
The piping on the primary side to which the pressure oil from the hydraulic source is supplied to the four-way switching valve is provided with a check valve for preventing the backflow of the pressure oil to the hydraulic source.
From the hydraulic source to the four-way switching valve between the piping portion on the four-way switching valve side and the tank return pipe connected from the four-way switching valve to the tank side from the check valve of the primary side pipe. Equipped with a relief valve that controls the supplied pressure oil to a predetermined pressure
Each of the secondary side pipes connected from the four-way switching valve to the ascending cylinder chamber and the descending cylinder chamber of the double-acting cylinder is allowed to supply pressure oil to the double-acting cylinder side, and the above-mentioned A check valve for blocking the discharge of pressure oil from the double-acting cylinder side and a flow control valve for adjusting the flow rate of the pressure oil discharged from the double-acting cylinder side to the tank side are provided.
A fire hydrant device in a tunnel.
A hose storage unit that stores a hose with a nozzle, an elevating mechanism that raises and lowers the hose storage unit, and an elevating control circuit that controls the elevating mechanism are provided. In a tunnel fire hydrant device that is housed in an observer passage and is installed so that the hose storage portion is raised and held at an exposed position on the road surface of the observer passage when a fire hydrant is used.
The elevating mechanism includes a gas pressure actuator that elevates and elevates the hose accommodating portion.
When the fire hydrant is used in the installed state, the elevating control circuit controls the gas pressure with respect to the gas pressure actuator so as to raise the hose accommodating portion to the exposed position, and the fire hydrant is placed in the observer passage in the installed state. The gas pressure with respect to the gas pressure actuator is controlled so as to lower the hose storage portion to the storage position when the hose is stored in the gas pressure actuator.
A fire hydrant device in a tunnel.

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