JP2018089211A - Fire hydrant equipment in tunnel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To remotely open a separately-disposed hydrant valve by an operation of a hydrant valve opening/closing lever in a hose storage part side without any necessity of mechanical connection such as a wire link.SOLUTION: A hydrant valve 72 separately disposed from a hose storage part, includes a valve opening/closing mechanism that is opened by application of a pilot pressure by a supply of a fire-fighting water to a cylinder chamber 80, and that is closed by reduction in the pilot pressure by discharge of the fire-fighting water from the cylinder chamber 80. A manual pilot valve 90 is disposed at a hose storage part side and, by opening operation of the manual pilot valve 90, the fire-fighting water is supplied via pilot pipes 86a and 86b to the hydrant valve 72. This configuration can remotely open the hydrant valve by application of the pilot pressure.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a fire hydrant facility in a tunnel that draws out a hose with a nozzle housed in a hose housing part and discharges fire-fighting water or fire-fighting bubbles by opening a fire hydrant valve.

  Conventionally, fire hydrant devices have been provided as emergency equipment for tunnels installed in tunnels such as expressways and motorway roads, and the fire hydrant device has a nozzle at the tip of the fire hydrant storage part of the housing with an openable fire hydrant door. Contains hoses and fire hydrant valves.

  Such a fire hydrant apparatus is installed at intervals of, for example, 50 meters along a side wall facing a supervisor 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 necessary to inspect various devices including fire hydrants installed safely in the tunnel without obstructing vehicle traffic in the tunnel. It is possible.

  When a vehicle accident involving a fire occurs, the user of the accident vehicle driver opens the fire hydrant door of the fire hydrant device, pulls out the hose with a nozzle, and operates the fire hydrant valve opening / closing lever. Fire extinguishing work can be performed by opening fire extinguishing pump equipment and discharging water.

JP 2008-055024 A JP 2009-285126 A

  However, in such a conventional fire hydrant device installed in the tunnel, it was installed along the tunnel side wall facing the observer passage, so that when a fire caused by a vehicle accident occurred, the user could It is necessary to reach out to 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 perform fire extinguishing work, and the fire hydrant device is installed at a high position away from the road surface Some people may have to go up and operate the guard passage without reaching their hands, and some guard passages are equipped with handrails that interfere with fire fighting operations and are difficult to handle. There was a case.

  In order to solve this problem, a fire hydrant device is embedded in the monitoring staff passage, a front door that is slid on the wall of the monitoring staff passage facing the road is provided, and is opened and closed upward on the road surface of the monitoring staff passage. Fire hydrant equipment with an upper door has been proposed.

  Thus, according to the fire hydrant device embedded in the surveillance passage, the user can easily and easily attach the nozzle from the hose storage section by opening the front door facing the road when a fire occurs due to a vehicle accident. The fire can be extinguished by pulling out the hose. If the vehicle stops in front of the fire hydrant device and cannot be operated from the front door, open the upper door of the supervisor passage and pull out the hose with a nozzle to prevent the fire from being interrupted. It can be carried out.

  However, in such a fire hydrant installation embedded in the supervisor passage, there is a restriction on the installation space of the fire hydrant equipment that can be secured in the supervisor passage, so a hose storage part is arranged on the supervisor passage side. The valves including the fire hydrant valve are separated and arranged in the management passage away from the underside of the supervisor passage, and the fire hydrant valve separated from the fire hydrant valve opening / closing lever installed on the hose housing part side There is a distance of about several meters, and the connection by the conventional wire link is too long to open and close the fire hydrant valve separated by the fire hydrant valve opening / closing lever.

  The present invention provides a fire hydrant facility in a tunnel that can remotely open a fire hydrant valve that is separately arranged by operating a fire hydrant valve opening / closing lever on the hose housing part side without requiring mechanical connection such as a wire link The purpose is to provide.

(Fire hydrant equipment with a pressure-release fire hydrant valve)
The present invention provides a fire hydrant facility in a tunnel,
A hose housed in a hose housing part and provided with a nozzle at the tip;
Valve opening and closing that is supplied with fire-extinguishing water on the primary side and connected to the hose on the secondary side, and is opened when the pilot pressure is increased by supplying fire-extinguishing water, and is closed when the pilot pressure is reduced by discharging fire-extinguishing water A fire hydrant valve with a mechanism;
A pilot valve that is arranged on the hose housing side, supplies fire-extinguishing water to the valve opening / closing mechanism of the fire hydrant valve via the pilot piping by opening the fire hydrant opening / closing lever, and is opened by pressurization of the pilot pressure;
When the pilot valve is closed, an orifice that drains fire-fighting water from the valve opening and closing mechanism of the fire hydrant valve and closes it by reducing the pilot pressure,
Is provided.

(Manually operated manual release valve and manual drain valve)
In the vicinity of the pressure-release fire hydrant valve,
A manual opening valve for supplying water for fire extinguishing to the valve opening and closing mechanism of the hydrant valve by opening operation and opening it by pressurization of pilot pressure;
A manual drain valve connected in parallel with the orifice;
Is provided.

(Fire hydrant equipment equipped with a decompression-open fire hydrant valve)
In another embodiment of the present invention, in a fire hydrant facility in a tunnel,
A hose housed in the hose housing part and provided with a nozzle at the tip;
Valve opening and closing that is supplied with extinguishing water on the primary side and connected to the hose on the secondary side, is opened when the pilot pressure is reduced by discharging the extinguishing water, and is closed when the pilot pressure is increased by supplying the extinguishing water A fire hydrant valve with a mechanism;
A pilot valve disposed on the hose housing side, draining fire-extinguishing water from the valve opening / closing mechanism of the fire hydrant valve via the pilot piping by opening the fire hydrant opening / closing lever, and opening the pilot valve by reducing the pilot pressure;
An orifice for supplying water for fire extinguishing to the valve opening and closing mechanism of the fire hydrant valve when the pilot valve is closed, and closing it by increasing the pilot pressure;
Is provided.

(Hand operated manual drain valve and manual shut-off valve)
In the vicinity of the decompression open type fire hydrant valve,
A manual drain valve that drains fire-fighting water from the valve opening and closing mechanism of the hydrant valve by opening operation and opens it by reducing the pilot pressure;
A manual shut-off valve connected in parallel with the orifice;
Is provided.

(Fire hydrant valve secondary drain valve)
A manual drain valve or an automatic drain valve is provided on the secondary pipe of the fire hydrant valve.

(Release of foam extinguishing liquid)
The nozzle is a foam nozzle that emits fire extinguishing foam,
On the secondary side of the fire hydrant valve, a mixer is provided for mixing the foam stock solution in a predetermined ratio with the fire-extinguishing water, and the foam-extinguishing water mixed in the mixer is supplied to the foam nozzle to discharge the fire-extinguishing foam.

(Separate arrangement of hose storage and other parts)
A hose with a nozzle at the tip is housed and the hose housing part where the pilot valve is placed is embedded in the observer passage in the tunnel, and the other parts including the fire hydrant valve are below the observer passage Are separated and arranged in predetermined sections.

(Effect of fire hydrant equipment equipped with a pressure open fire hydrant valve)
In the fire hydrant facility in the tunnel, the present invention is housed in a hose housing portion, a hose provided with a nozzle at the tip, fire water is supplied to the primary side, and the hose is connected to the secondary side, A fire hydrant valve equipped with a valve opening / closing mechanism that is opened when the pilot pressure is increased by supplying fire-extinguishing water and is closed when the pilot pressure is reduced by discharging fire-extinguishing water, and the opening of the hydrant opening / closing lever A pilot valve that supplies fire-fighting water to the valve opening / closing mechanism of the fire hydrant valve via the pilot pipe by operation and opens when the pilot pressure is increased, and when the pilot valve is closed, the fire-fighting water from the valve opening / closing mechanism of the fire hydrant valve An orifice that drains the water and closes it by reducing the pilot pressure is provided, so opening the fire hydrant valve opening / closing lever provided in the hose housing opens the pilot valve. Even if the fire hydrant valve is installed more than a few meters away by increasing the pilot pressure by supplying fire water through the pilot piping to the fire hydrant valve, the fire hydrant is reliably controlled by remote control of the pilot fluid pressure. The valve is opened, and it is possible to discharge water for fire extinguishing from the nozzle of the drawn hose.

  Further, when the pilot valve is closed, the water for fire extinguishing is drained to the valve opening / closing mechanism through the orifice, so that the pilot pressure is slowly reduced and the fire hydrant valve can be smoothly closed without causing an impact.

  Even if the pilot valve and the fire hydrant valve are separated by more than a few meters, they are connected by a pilot pipe with a small diameter of, for example, 10 millimeters, so that piping work can be performed easily even if the distance is long. It is possible to reduce the equipment cost.

(Effects of hand operated manual release valve and manual drain valve)
Also, in the vicinity of the pressure-opening type fire hydrant valve, a manual opening valve that supplies water for extinguishing to the valve opening / closing mechanism of the fire hydrant valve by opening operation and opens it by pressurizing the pilot pressure, and a manual opening valve connected in parallel with the orifice When checking the fire hydrant equipment, when opening the manual release valve at the place where the fire hydrant valve is installed, the pilot pressure is increased and the fire hydrant valve is opened, and the fire hydrant valve is closed. In this case, when the manual release valve is closed, the pilot pressure is slowly reduced through the orifice, and the fire hydrant valve can be closed smoothly without causing an impact. In this case, if the manual drain valve connected in parallel to the orifice is opened, the pilot pressure is quickly reduced, the fire hydrant valve is closed in a short time, and the restoration work can be performed in a short time after inspection.

(Effect of automatic drain valve)
In addition, when an automatic drain valve is provided instead of a manual drain valve, when the pilot valve is closed, the valve opening and closing mechanism of the fire hydrant valve and the pilot pipe are drained automatically, thereby preventing corrosion of the pilot pipe. The durability of the piping equipment is improved, and in addition, there is no risk of forgetting to close it in the case of a manual drain valve. Furthermore, since drainage can be performed under the floor slab instead of the roadway, vehicle traffic safety is ensured.

(Effect of fire hydrant equipment equipped with a decompression-open fire hydrant valve)
In another embodiment of the present invention, in a fire hydrant facility in a tunnel, a hose housed in a hose housing part and provided with a nozzle at the tip, water for fire extinguishing is supplied to the primary side, and on the secondary side A fire hydrant valve having a valve opening / closing mechanism connected to the hose, opened by reducing the pilot pressure by discharging fire-extinguishing water, and closed by increasing the pilot pressure by supplying fire-extinguishing water, and disposed on the hose housing side. The pilot valve that drains fire-fighting water from the valve opening / closing mechanism of the fire hydrant valve via the pilot pipe by opening the fire hydrant opening / closing lever and opens it by reducing the pilot pressure, and when the pilot valve is closed, An orifice that is supplied to the valve opening / closing mechanism of the valve and closed by the application of the pilot pressure is provided, so that if the hydrant valve opening / closing lever provided in the hose housing is opened, The pilot valve is opened, and the pilot pressure is reduced by supplying fire-fighting water to the fire hydrant valve via the pilot pipe. The fire hydrant valve is reliably opened by the control, and the fire water can be discharged from the nozzle of the drawn hose.

  Further, when the pilot valve is closed, the water for fire extinguishing is supplied to the valve opening / closing mechanism through the orifice, so that the pilot pressure is slowly increased and the fire hydrant valve can be closed.

  Even if the pilot valve and the fire hydrant valve are separated by more than a few meters, they are connected by a pilot pipe with a small diameter of, for example, 10 millimeters, so that piping work can be performed easily even if the distance is long. It is possible to reduce the equipment cost. In the case of a decompression open type fire hydrant valve, the pilot pipe connecting the fire hydrant valve and the pilot valve is only one for drainage, and the piping work of the pilot pipe is further simplified.

(Effects of hand operated manual release valve and manual close valve)
In addition, a manual open valve that drains fire-extinguishing water from the valve opening / closing mechanism of the fire hydrant valve and opens it by reducing the pilot pressure in the vicinity of the decompression open type fire hydrant valve, and a manual closing valve connected in parallel with the orifice Therefore, when checking the fire hydrant equipment, opening the manual drain valve at the place where the hydrant valve is installed opens the fire hydrant valve by reducing the pilot pressure, and when closing the fire hydrant valve, When the manual drain valve is closed, the pilot pressure is slowly increased through the orifice and the fire hydrant valve can be closed. In this case, if the manual closing valve connected in parallel to the orifice is opened, the pilot pressure is quickly increased, and the fire hydrant valve can be closed in a short time.

(Effect of the drain valve on the secondary side of the fire hydrant valve)
In addition, since the manual drain valve or automatic drain valve is provided on the secondary pipe of the fire hydrant valve, when the fire hydrant valve is closed, the drainage in the secondary pipe by the manual drain valve or automatic drain valve It is possible to prevent corrosion. Further, in the case of a manual drain valve, the water in the pipe can be drained at a large flow rate. On the other hand, there is no risk of forgetting to close the automatic drain valve.

(Effect of releasing foam fire extinguishing liquid)
In addition, the nozzle is a foam nozzle that discharges fire-extinguishing foam. On the secondary side of the fire hydrant valve, a mixer for mixing the foam stock solution in a predetermined ratio with fire-extinguishing water is provided, and the foam fire-extinguishing water mixed in the mixer is foamed. Because the fire extinguishing foam is released by supplying it to the nozzle, the fire caused by the vehicle accident in the tunnel is a gasoline fire due to fuel leakage, and it is possible to reliably suppress the fire by discharging the fire extinguishing foam. And

(Effects of separate arrangement of hose storage and other parts)
The hose storage part in which the hose with the nozzle is stored and the pilot valve is arranged is embedded in the monitor passage in the tunnel, and the other part including the fire hydrant valve is a predetermined part formed below the monitor passage. Even if it is a tunnel structure such as a shield tunnel where sufficient installation space for fire hydrant equipment cannot be secured in the observer passage on the side of the tunnel wall along the road, space limitations are imposed by the separation arrangement. The fire hydrant equipment can be placed without receiving it.

(Effects of separate arrangement of hose storage and other parts)
In addition, a hose with a nozzle at the tip is housed and a hose housing part where a pilot valve is arranged is embedded in a monitoring person passage in the tunnel, and other parts including the fire hydrant valve are installed in the monitoring person passage. Since it is arranged separately in a predetermined section formed on the lower side, it is possible to perform a water discharge test etc. only under the floor slab, making testing and maintenance easy and enabling efficient work to proceed. And

Explanatory drawing showing emergency equipment for tunnels including fire hydrant equipment installed in a shield tunnel Explanatory drawing showing fire hydrant storage box for storing hose from front, plane and side Explanatory drawing which showed the internal structure of the fire hydrant storage box which stores a hose from the front, a plane, and a side Explanatory drawing which showed the water discharge control mechanism provided with the pressure open type fire hydrant valve with the cross section seen from the road surface side with the fire hydrant storage box by the side of a supervisor Explanatory drawing which showed the water discharge control mechanism provided with the decompression-opening type fire hydrant valve with the cross section seen from the road surface side with the fire hydrant storage box by the side of a supervisor

[Outline of tunnel emergency equipment]
FIG. 1 is an explanatory view showing a tunnel emergency facility including a fire hydrant facility installed in a tunnel of an automobile exclusive road. 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. In this example, The road 15 has two lanes in one direction.

  A supervisor passage 14 is provided along the tunnel wall 12 on the left side of the road 15 partitioned by the floor slab 18, and the inner space below the supervisor passage 14 is used as a duct 22, and a conduit is laid. . The monitoring staff passage 14 has a size of 90 centimeters in height and 70 centimeters in width, for example.

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

  A fire hydrant facility 16 is installed every 50 meters in the longitudinal direction of the tunnel 10, and the fire hydrant facility 16 is separately installed in a fire hydrant storage box 30 in which a hose is stored and a water discharge control mechanism storage unit 70.

  The fire hydrant storage box 30 is disposed in a fire hydrant embedding portion that is penetrated in a box shape over the road surface of the supervisor passage 14 and the wall surface on the road 15 side. The water discharge control mechanism storage unit 70 is disposed in the management passage 20 on the lower side of the fire hydrant storage box 30, the branch pipe 24 a branched from the water supply main pipe 24 is drawn in, and fire water is supplied to the fire hydrant storage box 30. The water supply piping to be started up.

[Fire hydrant equipment]
FIG. 2 is an explanatory view showing the fire hydrant storage box for storing the hose from the front, the plane and the side, and FIG. 3 is an explanatory view showing the internal structure of the fire hydrant storage box for storing the hose from the front, the plane and the side.

(External structure of fire hydrant storage box)
As shown in FIG. 2, the fire hydrant storage box 30 of the fire hydrant facility 16 is embedded in an internal space below the road surface of the supervisor passage 14. As shown in FIG. 2A, the fire hydrant storage box 30 has a fixed door 34 disposed below the center of the front surface, and a front door 32 disposed slidably in the vertical direction above the fixed door 34. Yes.

  As shown in FIG. 2B, an upper door 38 having the same width as the front door 32 can be opened and closed upward by a hinge 40 at the center of the upper surface of the fire hydrant storage box 30 on the road surface side of the monitoring person passage 14. Has been placed.

  The front door 32 and the upper door 38 are locked by the handle 36 in the closed state. When the handle 36 is opened, the lock is released, and the front door 32 falls to the back side of the fixed door 34 by its own weight, so that the fire hydrant storage box 30 The upper part of the front surface is opened, and the upper door 38 is opened upward to open the upper surface of the fire hydrant storage box 30.

  A notification device panel 42 is provided at the upper left of the front surface of the fire hydrant storage box 30. The notification device panel 42 is provided with a red indicator lamp 44, a transmitter 45, a telephone jack 46, and a response lamp 48. The red indicator lamp 44 is always lit so that the installation location of the fire hydrant facility can be seen from a distance. In the event of a fire, when the push button switch is turned on by pressing the transmitter 45, a transmission signal is transmitted to the fire receiver in the monitoring room, a fire alarm is issued, and a response signal is sent from the fire receiver accordingly, and a response lamp 48 is turned on and the red indicator lamp 44 is flashed.

(Internal structure of fire hydrant storage box)
As shown in FIG. 3, the inside lower side of the fire hydrant storage box 30 is a hose storage portion 50, and a hose 60 having a shape retaining structure is internally wound around the horizontal. Here, since the width of the fire hydrant storage box 30 is about 1.8 meters and the depth is about 0.7 meters, the length of one turn of the hose 60 wound inside the hose storage portion 50 is approximately 4.8. Since the hose length is about 25 meters or more, the hose 60 may be wound internally for several turns or more.

  A guide pipe 52 is disposed in the center of the fire hydrant storage box 30. The guide pipe 52 uses a metal pipe, and two guide pipes 56 bent in an L shape from the upper surface to the front surface are arranged inside the openings of the front door 32 and the upper door 38 shown in FIG. The guide pipe 54 is disposed laterally at the approximate center of the guide pipe 54 and both ends thereof are fixed to the guide pipe 56. When the front door 32 and the upper door 38 are opened, the upper front surface and the upper opening that follows the guide pipe 54, 56 are provided. The space for taking out the hose 60 is formed by partitioning with.

  A nozzle holder 64 is disposed on the back surface of the upper door 38, and a foam nozzle 62 provided at the tip of the hose 60 is detachably locked to the nozzle holder 64. For this reason, when the upper door 38 is opened, the foam nozzle 62 held on the rear surface of the door appears on the upper portion of the fire hydrant storage box 30.

  An operation box 66 is disposed on the upper side of the guide pipe 56 disposed on the right side in the fire hydrant storage box 30, and a fire hydrant valve opening / closing lever 68 is provided in the operation box 66 and provided inside the operation box 66. The manual pilot valve is opened and closed. When the fire hydrant valve opening / closing lever 68 is opened, the manual pilot valve is opened and the fire hydrant valves arranged separately can be remotely opened.

  Pilot pipes 86a and 86b are connected to the manual pilot valve provided in the operation box 66 from the lower side. The pilot pipes 86 a and 86 b are connected to a manual pilot valve in the operation box 66 through a pipe duct 65 disposed on the right side of the guide pipe 56 from the lower side.

  As shown in the plane of FIG. 3 (B), the hose 60 wound in the hose accommodating portion 50 is wound in a state of being slightly curved inward at the guide pipe 56 and the piping duct 65.

[Structure of water discharge control mechanism equipped with a pressure-release fire hydrant valve]
FIG. 4 is an explanatory view showing a water discharge control mechanism provided with a pressure-opening type fire hydrant valve as a cross-section viewed from the road surface side together with a fire hydrant storage box on the side of a supervisor.

(Configuration of water discharge control mechanism)
As shown in FIG. 4, a water discharge control mechanism storage unit 70 is disposed in the management passage 20 below the internal space of the supervisor passage 14 in which the fire hydrant storage box 30 is disposed.

  The water discharge control mechanism storage unit 70 is provided with a pressure-release type fire hydrant valve 72, an automatic pressure regulating valve 74, and a mixer 76 as valves constituting the water discharge control mechanism.

  The branch pipe 24 a branched from the water supply main pipe 24 is connected to the primary side of the fire hydrant valve 72, and the automatic pressure regulating valve 74 and the mixer 76 are connected to the fire hydrant valve 72. A pipe from the foam stock solution tank 78 is connected to the mixer 76, and the fire extinguishing water obtained by mixing the foam stock solution in a predetermined ratio with the fire extinguishing water flowing through the mixer 76 is connected to the hose 60 of the fire hydrant storage box 30 through the water supply pipe 25. To supply.

  The fire hydrant valve 72 is a valve opening / closing mechanism for releasing pressure, and a piston 82 is slidably provided in the cylinder chamber 80. A valve body 85 is connected to the piston 82 by a piston rod. A spring 84 is incorporated in the.

  The fire hydrant valve 72 is closed in a normal state. The fire hydrant valve 72 is closed by discharging fire water from the cylinder chamber 80, reducing the pilot pressure to zero, pushing the piston 82 in the closing direction by the spring 84, and bringing the valve body 85 into contact with the valve seat. The secondary side and secondary side flow paths are closed to a closed state.

  In order to open the fire hydrant valve 72, water for fire extinguishing is supplied to the cylinder chamber 80 to increase the pilot pressure, so that the piston 82 is stroked outward against the spring 84, and the valve body 85 is separated from the valve seat. Then, the primary side and the secondary side are made to communicate with each other.

  In order to open the fire hydrant valve 72 by remote operation, the operation box 66 of the fire hydrant storage box 30 is provided with a manual pilot valve 90 that is opened and closed by a fire hydrant valve opening / closing lever 68.

  A pilot pipe 86a drawn from the branch pipe 24a is connected to the primary side of the manual pilot valve 90. The secondary side of the manual pilot valve 90 is connected to the cylinder of the fire hydrant valve 72 via the check valve 93 by the pilot pipe 86b. It is connected to the chamber 80.

  The check valve 93 provided in the pilot pipe 86b prevents the water from flowing back into the pilot pipe 86b up to the manual pilot valve 90 of the fire hydrant storage box 30 when the manual release valve 92 is opened. It is out.

  A manual release valve 92 is connected between the pilot pipes 86a and 86b, and a manual drain valve 94 is connected between the pilot pipe 86b and the drain side in parallel with a pipe in which an orifice 95 and a check valve 104 are connected in series. Is connected.

  Further, a drain valve 97 is provided on the secondary pipe of the fire hydrant valve 72. The drain valve 97 may be an automatic drain valve. The manual drain valve 97 has an advantage that drainage can be performed at a larger flow rate than the automatic drain valve, but there is a risk of forgetting to close it. On the other hand, the automatic drain valve discharges water at a lower flow rate than the manual drain valve 97, but there is no problem of forgetting to close it.

  The water supply pipe 25 is provided with a pressure switch 100 that is turned on by pressurization. When the fire hydrant valve 72 is opened, the pressure switch 100 is turned on, and an on signal is sent to the disaster prevention reception panel via the fire hydrant storage box 30. The operation of the valve 72, for example, the start and stop of water discharge can be monitored.

  The pilot pipe 86b is also provided with a pressure switch 102 that is turned on under pressure. When the manual pilot valve 90 is opened, the pressure switch 102 is turned on, and an on signal is sent to the disaster prevention reception board via the fire hydrant storage box 30. The operation of the manual pilot valve 90 can be monitored. For example, the opening operation of the manual pilot valve 90 is detected to activate the fire fighting pump equipment, and the closing operation of the manual pilot valve 90 is detected to stop the fire fighting pump equipment. Make it possible.

  In the present embodiment, the manual pilot valve 90 is directly opened and closed by the fire hydrant valve opening / closing lever 68. However, the manual pilot valve 90 is disposed in another place in the fire hydrant storage box 30, and the wire link It may be opened and closed remotely.

(Operation of fire hydrant equipment)
When a vehicle accident involving a fire occurs in the tunnel 10, the user goes to the fire hydrant facility 16 near the place where the fire occurred and presses the transmitter 45 of the notification device panel 42 shown in FIG. A fire report signal is transmitted to the panel, a confirmation response signal is received from the disaster prevention reception panel, the response lamp 48 is turned on, and the red indicator lamp 44 is blinked to confirm the completion of the report to the monitoring center side.

  Subsequently, in order to perform a fire extinguishing operation, when the handle 36 of the fire hydrant storage box 30 is operated to release the lock, the front door 32 slides and opens, and when the upper door 38 is opened upward, FIG. As shown, the foam nozzle 62 locked to the back surface of the opened upper door 38 is exposed at the top.

  The user removes the foam nozzle 62 from the nozzle holder 64 and pulls out the hose 60. The hose 60 pulled out at this time is smoothly pulled out while sliding on the guide pipes 54 and 56.

  When the vehicle is stopped in front of the fire hydrant storage box 30 and cannot be operated from the front side, the user operates from the supervisor passage 14.

  Subsequently, when the hydrant valve opening / closing lever 68 provided in the operation box 66 arranged on the right side of the opening space of the hydrant storage box 30 is operated in the opening direction, the manual pilot valve 90 is opened, and the fire is discharged from the branch pipe 24a. Water is supplied to the cylinder chamber 80 of the fire hydrant valve 72 via the pilot pipe 86a, the manual pilot valve 90, and the pilot pipe 86b, the pilot pressure is increased, the piston 82 is stroked outward against the spring 84, and the valve The fire hydrant valve 72 is opened by separating the body 85 from the valve seat.

  When the fire hydrant valve 72 is opened, fire water from the water supply main 24 flows from the water supply pipe 25 toward the hose 60 of the fire hydrant storage box 30 through the fire hydrant valve 72, the automatic pressure regulating valve 74, and the mixer 76. When the foam stock solution is mixed at a predetermined ratio in 76 and the foam fire-extinguishing water is discharged from the foam nozzle 62 of the hose 60 drawn from the fire hydrant storage box 30, the fire-extinguishing foam formed by entraining air is released. .

  In addition, when the fire hydrant valve 72 is opened, it is necessary to send the pump activation signal to the fire extinguishing pump equipment to activate it. Therefore, the fire hydrant that is turned on by opening the fire hydrant valve opening / closing lever 68 and transmits the pump activation signal A valve opening detection switch is provided in the operation box 66.

  When the fire is extinguished and the extinguishing operation is completed, the hydrant valve opening / closing lever 68 is returned to the closed position, and the manual pilot valve 90 is closed. When the manual pilot valve 90 is closed, the water in the cylinder chamber 80 is slowly drained through the orifice 95, the pilot pressure is reduced to zero, the piston 82 is pushed back by the spring 84 and is brought into contact with the valve seat, Thereby, the fire hydrant valve 72 is closed, and the discharge of the fire-fighting bubbles is stopped.

  When it is confirmed that the fire hydrant valve 72 has been closed, the person in charge goes to the water discharge control mechanism housing 70 in the management passage 20 and opens the manual drain valve 97 to drain the water in the water supply pipe 25. As a result, the water supply pipe 25 is drained and corrosion can be prevented. Of course, when the drainage is confirmed, the manual drainage valve 97 is closed to restore the original state.

  Further, when the manual drain valve 97 is an automatic drain valve, draining of the water supply pipe 25 is automatically performed when the fire hydrant valve 72 is closed without requiring the operation of a person in charge.

  On the other hand, when checking the water discharge control mechanism, the person in charge goes to the water discharge control mechanism storage 70 arranged in the management passage 20 and opens the manual release valve 92, so that the water for extinguishing water is supplied to the cylinder chamber 80. The pilot pressure is increased, and the fire hydrant valve 72 is opened so that a predetermined water discharge test can be performed.

  The check valve 93 provided in the pilot pipe 86b prevents the water from flowing back into the pilot pipe 86b up to the manual pilot valve 90 of the fire hydrant storage box 30 when the manual release valve 92 is opened. It is out.

  When the water discharge test is completed, the manual release valve 92 is closed. When the manual release valve 92 is closed, the water in the cylinder chamber 80 is drained through the orifice 95, the pilot pressure is reduced to zero, and the fire hydrant valve 72 is closed.

  In this case, since the drainage through the orifice 95 takes time to close the fire hydrant valve 72, the fire hydrant valve 72 may be closed in a short time by opening the manual drainage valve 94 and draining it quickly.

[Fire hydrant equipment equipped with a decompression-open fire hydrant valve]
(Configuration of water discharge control mechanism)
FIG. 5 is an explanatory view showing a water discharge control mechanism provided with a decompression-opening type fire hydrant valve as seen from a road surface side together with a fire hydrant storage box on the side of a supervisor.

  As shown in FIG. 5, the water discharge control mechanism housing portion 70 installed in the management passage 20 includes a decompression open type fire hydrant valve 72, an automatic pressure control valve 74, and a mixer 76 as valves constituting the water discharge control mechanism. Is provided.

  The branch pipe 24 a branched from the water supply main pipe 24 is connected to the primary side of the fire hydrant valve 72, and the automatic pressure regulating valve 74 and the mixer 76 are connected to the fire hydrant valve 72, and the foam raw liquid tank 78 is connected to the mixer 76. Is connected to the water hose 60 of the fire hydrant storage box 30 via the water supply pipe 25.

  The fire hydrant valve 72 is a valve opening / closing mechanism for performing decompression and opening, and a piston 82 is slidably provided in an outer cylinder chamber 80. A valve body 85 is connected to the piston 82 by a piston rod. Incorporates a spring 84.

  The fire hydrant valve 72 is closed in a normal state. The hydrant valve 72 is closed by supplying a fire-extinguishing water to the cylinder chamber 80 to maintain the pilot pressure, pushing the piston 82 against the spring 84 in the closing direction, and the valve body 85 to the valve seat. By bringing them into contact with each other, the primary side and secondary side flow paths are closed and closed.

  In order to open the fire hydrant valve 72, the water for fire extinguishing is discharged from the cylinder chamber 80 and the pilot pressure is reduced to zero, whereby the piston 82 is stroked outward by the spring 84, and the valve body 85 is separated from the valve seat 1 An open state is established by communicating the secondary side and the secondary side.

  In order to open the fire hydrant valve 72 by remote control, the primary side of the manual pilot valve 90 provided in the operation box 66 of the fire hydrant storage box 30 is connected to the cylinder chamber 80 of the fire hydrant valve 72 by a pilot pipe 86, and the manual pilot valve The secondary side of 90 is the drain side.

  A manual drain valve 96 is connected between the pilot pipe 86 and the drain side, and a manual closing valve 98 is connected between the branch pipe 24a and the pilot pipe 86 in parallel with the pipe in which the orifice 99 and the check valve 106 are connected in series. It is connected. Further, a drain valve 97 is provided on the secondary pipe of the fire hydrant valve 72. The drain valve 97 may be an automatic drain valve.

  The water supply pipe 25 is provided with a pressure switch 100 that is turned on by pressurization. When the fire hydrant valve 72 is opened, the pressure switch 100 is turned on, and an on signal is sent to the disaster prevention receiving board via the fire hydrant storage box 30 to put the fire hydrant valve 72. For example, the start and stop of water discharge can be monitored.

  Also, the pilot pipe 86b is provided with a pressure force switch 104 that is turned on by depressurization. When the manual pilot valve 90 is opened and depressurized, the pressure switch 104 is turned on and is turned on to the disaster prevention reception board via the fire hydrant storage box 30. The operation of the manual pilot valve 90 can be monitored by sending a signal. For example, the opening operation of the manual pilot valve 90 is detected to activate the fire pumping equipment, and the closing operation of the manual pilot valve 90 is detected to Enable control to stop.

(Operation of fire hydrant equipment)
When a vehicle accident involving a fire occurs in the tunnel 10, as shown in FIG. 5, the front door 32 and the upper door 38 of the fire hydrant storage box 30 are opened and the foam nozzle locked to the back surface of the upper door 38. 62 is removed, the hose 60 is pulled out, and then the fire hydrant valve opening / closing lever 68 is operated in the opening direction.

  When the hydrant valve opening / closing lever 68 is opened, the manual pilot valve 90 is opened, and the fire water held in the cylinder chamber 80 of the hydrant valve 72 is drained via the pilot pipe 86 and the manual pilot valve 90, and the cylinder chamber 80 The pilot pressure is reduced to zero, the piston 82 is stroked outward by the spring 84, and the valve body 85 is separated from the valve seat, whereby the fire hydrant valve 72 is opened.

  When the fire hydrant valve 72 is opened, fire water from the water supply main 24 flows from the water supply pipe 25 toward the hose 60 of the fire hydrant storage box 30 through the fire hydrant valve 72, the automatic pressure regulating valve 74, and the mixer 76. When the foam stock solution is mixed at a predetermined ratio in 76 and the foam fire-extinguishing water is discharged from the foam nozzle 62 of the hose 60 drawn from the fire hydrant storage box 30, the fire-extinguishing foam formed by entraining air is released. .

  When the fire is extinguished and the extinguishing operation is completed, the hydrant valve opening / closing lever 68 is returned to the closed position, and the manual pilot valve 90 is closed. When the manual pilot valve 90 is closed, the water for fire extinguishing from the branch pipe 24 a is slowly supplied to the cylinder chamber 80 through the orifice 99 to increase the pilot pressure, and the piston 82 strokes against the spring 84. The valve body 85 is brought into contact with the valve seat, whereby the fire hydrant valve 72 is closed and the discharge of the fire-fighting bubbles is stopped.

  When it is confirmed that the fire hydrant valve 72 has been closed, the person in charge goes to the water discharge control mechanism housing 70 in the management passage 20 and opens the manual drain valve 97 to drain the water in the water supply pipe 25. As a result, the water supply pipe 25 is drained and corrosion can be prevented. Of course, when the drainage is confirmed, the manual drainage valve 97 is closed to restore the original state.

  Further, when the manual drain valve 97 is an automatic drain valve, draining of the water supply pipe 25 is automatically performed when the fire hydrant valve 72 is closed without requiring the operation of a person in charge.

  Further, when checking the water discharge control mechanism, when the person in charge goes to the water discharge control mechanism storage unit 70 disposed in the management passage 20 and opens the manual drain valve 96, the fire-fighting water held in the cylinder chamber 80 is opened. Is discharged, the pilot pressure is reduced to zero, and the fire hydrant valve 72 is opened to allow a predetermined water discharge test to be performed.

  Further, when the test water discharge is completed, when the manual drain valve 96 is closed, the fire hydrant valve 72 is closed by the pressurization of the pilot pressure by the supply of fire-extinguishing water through the orifice 99. In this case, since it takes time to close the fire hydrant valve 72 when the water for fire extinguishing is supplied through the orifice 99, the pilot valve is quickly pressurized by opening the manual shut-off valve 98, so that the fire hydrant valve 72 can be quickly closed. It may be closed.

[Modification of the present invention]
(Pilot valve)
In the above embodiment, the manual pilot valve 90 is directly operated by the fire hydrant valve opening / closing lever 68, but the present invention is not limited to this. For example, a fire hydrant valve opening / closing lever and a pilot valve may be arranged separately, and both may be connected by a wire link for opening / closing operation, or the pilot valve may be an electric valve, and the operation of the fire hydrant valve opening / closing lever may be detected by a switch. You may make it open and close the motor operated valve provided as a valve.

(Fixed installation type hose compartment)
In the above embodiment, a fire hydrant facility that opens the front door and the upper door provided in the fire hydrant storage box and pulls out the hose provided with the foam nozzle is taken as an example, but the present invention is not limited to this. The same water discharge control mechanism as that of the above-described embodiment may also be used for an elevating type fire hydrant facility that raises the hose storage portion by the elevating mechanism and exposes it on the supervisor passage when performing.

(Integration of fire hydrant valve and automatic pressure control valve)
In the above embodiment, the fire hydrant valve and the automatic pressure control valve are connected by separate pipes, but the present invention is not limited to this, and an automatic pressure control type fire hydrant valve in which the fire hydrant valve and the automatic pressure control valve are integrated is provided. It may be provided. By integrating a fire hydrant valve and an automatic pressure control valve, it is possible to reduce the size of the valves and reduce the installation space.

(Drainage test facility under floor slab)
In the above-described embodiment shown in FIGS. 4 and 5, a branch pipe capable of connecting a maintenance hose to the water supply pipe 25 provided in the manager passage 20 under the floor slab via an on-off valve that opens and closes the flow path. In addition, a hose connection port may be provided to enable a water discharge test under the floor slab.

(Foam hydrant equipment)
Although the said embodiment has taken the foam fire hydrant equipment which discharges a fire-fighting foam as an example, it is not limited to this, It is good also as a fire hydrant equipment which discharges water for fire extinguishing.

(Other)
The present invention includes appropriate modifications that do not impair the object and advantages thereof, and is not limited by the numerical values shown in the above embodiments.

10: Tunnel 12: Tunnel wall 14: Monitor passage 15: Road 16: Fire hydrant equipment 18: Floor slab 20: Management passage 22: Duct 24: Water supply main 24a: Branch pipe 25: Water supply pipe 30: Fire hydrant storage box 32 : Front door 34: Fixed door 36: Handle 38: Upper door 40: Hinge 42: Notification device panel 44: Red indicator lamp 45: Transmitter 46: Telephone jack 48: Response lamp 50: Hose storage parts 52, 54, 56: Guide pipe 60: Hose 62: Foam nozzle 64: Nozzle holder 66: Operation box 68: Fire hydrant valve opening / closing lever 70: Water discharge control mechanism storage 72: Fire hydrant valve 74: Automatic pressure regulating valve 76: Mixer 78: Foam stock solution tank 80: Cylinder chamber 82: Piston 84: Spring 85: Valve bodies 86, 86a, 86b: Pilot piping 90: Manual pilot valve 92: Manual release valves 93, 10 , 108: check valve 98: the manual closing valves 94,96,97: Manual drain valve 95, 99: Orifice 100, 102, 104: pressure switch

Claims (7)

A hose housed in the hose housing part and provided with a nozzle at the tip;
Fire extinguishing water is supplied to the primary side and the hose is connected to the secondary side, and is opened when the pilot pressure is increased by supplying the fire extinguishing water, and is closed when the pilot pressure is reduced by discharging the extinguishing water. A fire hydrant valve equipped with a valve opening and closing mechanism,
A pilot valve that is disposed on the hose housing side and that supplies the fire-extinguishing water to the valve opening / closing mechanism of the fire hydrant valve via a pilot pipe by opening a fire hydrant opening / closing lever and opens the pilot valve by pressurizing the pilot pressure; ,
An orifice that drains the fire-fighting water from the valve opening and closing mechanism of the fire hydrant valve and closes it by reducing the pilot pressure when the pilot valve is closed;
A fire hydrant facility in the tunnel characterized by the provision of
In the tunnel fire hydrant facility according to claim 1,
In the vicinity of the fire hydrant valve,
A manual opening valve that supplies the water for fire extinguishing to the valve opening and closing mechanism of the fire hydrant valve by an opening operation and opens it by pressurization of the pilot pressure;
A manual drain valve connected in parallel with the orifice;
A fire hydrant facility in the tunnel characterized by the provision of
A hose housed in the hose housing part and provided with a nozzle at the tip;
Fire extinguishing water is supplied to the primary side and the hose is connected to the secondary side, and is opened when the pilot pressure is reduced by discharging the fire extinguishing water, and is closed when the pilot pressure is increased by supplying the fire extinguishing water. A fire hydrant valve equipped with a valve opening and closing mechanism,
A pilot valve disposed on the hose housing side, draining the water for fire extinguishing from the valve opening / closing mechanism of the fire hydrant valve via a pilot pipe by opening the fire hydrant opening / closing lever, and opening the pilot valve by reducing the pilot pressure;
An orifice that supplies the fire-fighting water to the valve opening / closing mechanism of the fire hydrant valve when the pilot valve is closed, and closes it by pressurization of the pilot pressure;
A fire hydrant facility in the tunnel characterized by the provision of
In the fire hydrant facility in a tunnel according to claim 3,
In the vicinity of the fire hydrant valve,
A manual drain valve that drains the fire-extinguishing water from the valve opening / closing mechanism of the fire hydrant valve by an opening operation and opens the pilot fire by reducing the pilot pressure;
A manual shut-off valve connected in parallel with the orifice;
A fire hydrant facility in the tunnel characterized by the provision of
The fire hydrant equipment in a tunnel according to claim 1 or 3, wherein a manual drain valve or an automatic drain valve is provided in a secondary pipe of the fire hydrant valve.
In the fire hydrant facility in a tunnel according to claim 1 or 3,
The nozzle is a foam nozzle that discharges fire-extinguishing foam,
On the secondary side of the fire hydrant valve, a mixer is provided for mixing the foam stock solution in a predetermined ratio with the fire-extinguishing water, and the foam-extinguishing water mixed in the mixer is supplied to the foam nozzle to discharge the fire-extinguishing foam. Fire hydrant equipment in the tunnel characterized by
In the fire hydrant facility in a tunnel according to claim 1 or 3,
The hose containing the nozzle at the tip is accommodated and the hose accommodating part where the pilot valve is arranged is embedded in a monitor passage in a tunnel, and other parts including the fire hydrant valve are A fire hydrant facility in a tunnel, which is arranged separately in a predetermined section formed on the lower side of a supervisor passage.

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