JP7162686B2 - Fire hydrant device - Google Patents

Description

The present invention relates to fire hydrant systems, and more particularly to fire hydrant systems capable of releasing foam.

2. Description of the Related Art Conventionally, there is a fire hydrant device (hereinafter also referred to as a foam fire hydrant device) installed in a tunnel and capable of discharging foam to extinguish a fire (see, for example, Patent Literature 1). Such a fire hydrant device is equipped with a fire extinguishing agent tank for storing fire extinguishing agents. When a fire breaks out, fire extinguishing water and fire extinguishing agents are mixed in a mixer to generate an aqueous foam solution. is designed to emit

Also, the fire hydrant system was installed by embedding it in the space created by removing the box from the wall of the tunnel, but in recent years, the shield construction method has been used to excavate the tunnel. It becomes difficult to secure the installation space for the fire hydrant device by unboxing the wall surface. Therefore, in tunnels excavated by the shield construction method, the fire hydrant system should not be embedded in the tunnel wall, but should be installed in a relatively empty space (e.g. along the wall above the passageway for observers) within the section targeted for fire extinguishing by the fire hydrant system. The Rukoto.

JP 2014-79407 A

Since a passageway for guards in a tunnel or the like is a relatively narrow space, it is required to reduce the size and thickness of the fire hydrant device installed there. A foam fire hydrant system requires a fire extinguishing agent tank for storing fire extinguishing agent, and the volume of the fire extinguishing agent tank is closely related to the fire extinguishing performance of the fire hydrant system, such as the amount of foam discharged. Therefore, the volume of the fire extinguishing agent tank must be designed so that the required amount of foam can be released in the event of a fire.

Since the fire extinguishing agent tank is stored in the housing of the fire hydrant device, in the conventional fire hydrant device, the size of the housing must be increased according to the volume of the fire extinguishing agent tank. This has been an obstacle to miniaturization and thinning.

Therefore, in the present invention, without impairing the performance of the foam fire hydrant device, it is made smaller and thinner.
It is an object of the present invention to provide a foam fire hydrant device that can be

The present invention is a fire hydrant device installed in a tunnel in which a space is partitioned into an upper space and a lower space, and is installed in the upper space and has a fire hose with a nozzle on the tip side. , a foam generating unit installed in the lower space and having a fire extinguishing agent tank for storing a fire extinguishing agent and a mixer for mixing the extinguishing agent and the fire extinguishing water; and provided on the primary side of the mixer , a fire hydrant valve that shuts off the inflow of fire extinguishing water from the fire extinguishing pipe , and a check valve provided on the secondary side of the mixer, and the foam generating unit is located on the primary side and the water spraying unit. It is installed at a position spaced apart from the water spraying section on the lower position side, and the water spraying section is made thin by being separate from the foam generating section, and the water spraying section and the foam generating section are connected via a connection hose. It is a fire hydrant device characterized by being connected.
In addition, the present invention can further comprise a drain valve provided on the secondary side of the check valve, and a waste liquid tank for storing the waste liquid drained from the drain valve. Further, according to the present invention, the water spraying section is installed on the lifeguard passage provided on both sides of the road surface of the tunnel, and the foam generating section is installed so as to be embedded in the lifeguard passage. It is possible to assume

According to the present invention, the water spraying section and the foam generating section are configured as separate bodies, thereby making it possible to further reduce the thickness of the housing of the water spraying section. In addition, since the configuration of the fire hydrant device that needs to be operated when performing fire extinguishing work is summarized in the water sprinkler installed in the upper space, it is sufficient for fire extinguishing work if at least the sprinkler is installed in the upper space. It will happen.

Therefore, the present invention can provide a smaller and thinner foam fire hydrant device without impairing the performance of the foam fire hydrant device.

1 is a schematic diagram illustrating an embodiment of the present invention; FIG. It is a front view of the sprinkler part in embodiment of this invention. It is a perspective view of the sprinkler part in embodiment of this invention. It is a front view of the bubble production|generation part in embodiment of this invention. 1 is a system diagram of an embodiment of the present invention; FIG.

An embodiment of the present invention will be described with reference to FIGS. 1 to 5. FIG. The fire hydrant device 1 is installed, for example, in a tunnel 4, and includes a fire hydrant unit 2 as a sprinkler section, a foam generation unit 3 as a foam generation section, and a fire hydrant valve 32b. In this embodiment, the fire hydrant valve 32b is provided within the foam generation unit 3 . Also, the fire hydrant unit 2 and the foam generating unit 3 are connected via a connection hose 10 .

In this embodiment, the tunnel 4 is excavated by the shield construction method, and the wall portion 40 is provided in a substantially cylindrical shape. The space inside the wall portion 40 is vertically partitioned into an upper space 42 and a lower space 43 by a floor plate 41 or the like.

The upper space 42 includes a road surface 44 on which automobiles and the like pass and a guard passage 45 provided on both sides of the road surface 44 . In addition, the upper space 42 is provided with a fire hydrant installation section 46 for installing one or a plurality of fire hydrant units 2 according to the length of the tunnel 4 . The lower space 43 is provided with piping equipment such as a fire extinguishing pipe 47 and the like.

The connection hose 10 is installed, for example, in a space 43 a provided on the wall portion 40 side of the lower space 43 . Various hoses can be selected as the connection hose 10 as required, but for example, a flexible metal pipe, a shape-retaining hose, or the like is selected from the viewpoint of ease of construction.

The fire hydrant unit 2 is installed in a fire hydrant installation portion 46 provided in an upper space 42 that is a section to be extinguished by the fire hydrant device 1 . In the present embodiment, the fire hydrant installation portion 46 is provided in the observer passage 45 , and the fire hydrant unit 2 is installed in a form embedded in the observer passage 45 . Even if the fire hydrant unit 2 is embedded in the observer passage 45 , it is preferable that the fire hydrant unit 2 is thin, so that it becomes easier to walk on the observer passage 45 .

The fire hydrant unit 2 has a housing 20 . The housing 20 has a substantially box-shaped body portion 20a and a top plate 20b, and is provided with an indicator lamp 21 and a transmitter 22. As shown in FIG. The housing 20 is formed thinner in the depth direction than the housing 33 of the foam generating unit 3, which will be described later.

Fire hydrant doors 20d and 20e and fire extinguisher doors 20f and 20g, which are normally closed and opened during fire extinguishing work, are provided on the front panel 20c and the top plate 20b of the main body 20a, respectively. 2 and 3 show a state in which the fire hydrant door 20d and the fire extinguisher door 20f are open, and in the same figures, the state in which the fire hydrant door 20d and the fire extinguisher door 20f are closed is indicated by a chain double-dashed line. .

A pipe (not shown) connected to the connection hose 10 is provided in the housing 20, and the pipe is provided with a maintenance valve (not shown) consisting of a three-way valve. By operating the maintenance valve, the fire hydrant device 1 can switch the route of the foamy aqueous solution flowing through the connection hose 10, and can perform an operation test without using the fire hose 24. there is

The maintenance valve may be provided in the foam generating unit 3, or may be provided in both the fire hydrant unit 1 and the foam generating unit 2. When a maintenance valve (three-way valve) is provided on the foam generating unit 3 side, it is provided, for example, on the secondary side of the mixer 31 and near the check valve 12 inside or outside the housing 33 . By doing so, since the operation test of the fire hydrant device 1 can be performed in the lower space 43 under the floor plate 41, compared with the case of performing the operation test in the upper space 42, the test can be easily performed without road lane restrictions and the like. can be completed.

A fire extinguisher 23 is accommodated in the space inside the housing 20 corresponding to the back side of the fire extinguisher doors 20f and 20g. A fire hose 24 and a lever 25 are provided in the space inside the housing 20 corresponding to the back side of the fire hydrant doors 20d and 20e. A nozzle 24a is attached to the tip of the fire extinguishing hose 24, and the nozzle 24a is provided for discharging foam toward a fire source or the like in the event of a fire. Further, the lever 25 is provided to open the fire hydrant valve 32b, although the details will be described later.

In this embodiment, the nozzle 24a and the fire hose 24 can be taken out from either of the fire hydrant doors 20d and 20e. Also, the fire extinguisher 23 can be taken out from either of the fire extinguisher doors 20f and 20g. That is, in this embodiment, the fire extinguishing hose 24 (nozzle 24a) and the fire extinguisher 23 can be taken out of the housing 20 both from the guard passage 45 and from the road surface 44 side, and the lever 25 can be operated. It is possible.

In addition, when it is possible to operate the fire hydrant device 1 and take out the fire extinguisher 23 only from either the observer passage 45 or the road surface 44 side, the fire hydrant doors 20d and 20e and the fire extinguisher doors 20f and 20g can be provided only on either one of the main body portion 20a and the top plate 20b.

The foam generating unit 3 is installed at a position spaced lower than the fire hydrant unit 2, and in this embodiment, is installed in the lower space 43 of the tunnel 4, which is a section in which the fire extinguishing pipe 47 is installed. The foam generation unit 3 has a fire extinguishing agent tank 30 , a mixer 31 and a fire hydrant valve unit 32 , which are housed in a housing 33 .

The fire extinguishing agent tank 30 is provided to contain the extinguishing agent and to store it at all times. A siphon pipe 34 is attached to one edge in the longitudinal direction of the fire extinguishing agent tank 30 , and is connected to a chemical pipe 35 via the siphon pipe 34 . Further, the bottom of the extinguishing agent tank 30 is provided so as to be inclined downward toward the side where the siphon pipe 34 is attached.

A chemical pipe 35 is provided to connect the fire extinguishing chemical tank 30 to the mixer 31 . The chemical pipe 35 includes a chemical control valve 35a that is normally open and a chemical check valve 35b that can flow from the fire extinguishing agent tank 30 side to the mixer 31 side. is provided with a branch to a normally closed drug maintenance valve 35c.

The fire hydrant valve unit 32 has a secondary side connected to the primary side of the mixer 31 and a primary side connected to the fire extinguishing pipe 47 . The fire hydrant valve unit 32 includes, from at least the primary side, a normally open gate valve 32a, a normally closed fire hydrant valve 32b, a normally open automatic pressure regulating valve 32c, and an automatic drain valve 32d.

The fire hydrant valve 32b is provided on its secondary side to block the inflow of fire extinguishing water from the fire extinguishing pipe 47 . The fire hydrant valve 32b is connected via a wire 11 passing near a connection hose 10 connected to the lever 25 so that the fire hydrant valve 32b can be opened in conjunction with the operation of the lever 25. Specifically, the fire hydrant valve 32b and the lever 25 are each provided with a pulley (not shown), and the lever 25 opens the fire hydrant valve 32b by rotating the pulleys in conjunction with the wire 11. is possible.

In this embodiment, the fire hydrant unit 2 is installed in the upper space 42 and the foam generation unit 3 is installed in the lower space 43, so the length of the wire 11 is inevitably long. Therefore, the pulley on the side of the fire hydrant valve 32b is made equal to or larger in diameter than the pulley on the side of the lever 25, and the operating angle of the lever 25 (the movement angle of the pulley on the side of the lever 25) is The movement angle of the pulley on the side of the fire hydrant valve 32b is designed to be the same or smaller. By doing so, in this embodiment, the lever 25 can be operated with a light force, and even if the long wire 11 is stretched when the lever 25 is operated, the fire hydrant valve 32b can be fully opened. It looks like

The mixer 31 is provided to mix the fire extinguishing water and the fire extinguishing agent to generate a foam aqueous solution, and is connected to the fire extinguishing pipe 47 via the fire hydrant valve unit 32 and to the fire extinguishing agent tank via the chemical pipe 35. 30. The mixer 31 is of a line proportioner type, and when the fire extinguishing water is supplied from the fire extinguishing pipe 47, the mixer 31 sucks the inside of the chemical pipe 35, so that a negative pressure is applied to the fire extinguishing agent, and the extinguishing agent is extinguished. The drug is supplied from the drug pipe 35 to the mixer 31 . In the present embodiment, the mixer 31 is described as being of the line proportioner type, but the mixing method may be of another type, for example, of the pressure proportioner type.

Further, when the fire hydrant valve 32b is opened by operating the lever 25 of the fire hydrant unit 2, the mixer 31 is supplied with fire extinguishing water from the fire extinguishing pipe 47 by a pump (not shown). As fire-extinguishing water is supplied to the mixer 31 , the fire-extinguishing agent in the fire-extinguishing agent tank 30 is supplied to the mixer 31 through the agent pipe 35 . The mixer 31 then mixes the supplied fire extinguishing water and fire extinguishing agent to generate a foam solution.

The secondary side of the mixer 31 is branched into two directions, one of which is connected to an automatic drain valve 36, and the other of which is a check valve 12 provided outside the foam generation unit 3. It is connected to the fire hydrant unit 2 via a drain valve 13 and a connection hose 10 provided further on the secondary side of. The check valve 12 is provided to block the flow from the fire hydrant unit 2 side to the foam generation unit 3 side. Also, the drain valve 13 is connected to a waste liquid tank 14 , and the waste liquid drained from the drain valve 13 is accumulated in the waste liquid tank 14 .

Therefore, the foam aqueous solution generated by the mixer 31 is supplied from the foam generating unit 3 through the connecting hose 10 to the fire extinguishing hose 24 of the fire hydrant unit 2, and discharged from the nozzle 24a as foam toward the fire source. It is supposed to be done.

As in this embodiment, when there is a large drop between the position of the fire hydrant unit 2 and the position of the foam generating unit 3, when the foam discharge operation is completed and the pump stops, the foam remains in the connection hose 10 or the like. There is a possibility that the aqueous foam solution will flow back from the hydrant unit 2 to the foam generating unit 3 . If the foam solution flows back and enters the fire extinguishing pipe 47 through the foam generating unit 3, foam may be generated in the fire extinguishing pipe 47, which may cause a problem.

Therefore, in the present embodiment, the check valve 12 is provided to prevent the aqueous foam solution remaining in the connection hose 10 or the like from flowing back from the fire hydrant unit 2 to the foam generating unit 3. Drainage valve 13 drains to waste liquid tank 14 . The foam aqueous solution remaining in the foam generating unit 3 is discharged from the automatic drain valve 36 .

Therefore, in the fire hydrant device 1, the fire hydrant unit 2 and the foam generation unit 3 are configured as separate units, so that the housing 20 of the fire hydrant unit 2 can be made thinner. Since the configuration of the fire hydrant device 1 that needs to be operated when extinguishing a fire is summarized in the fire hydrant unit 2 installed in the upper space 42, if at least the fire hydrant unit 2 is installed in the upper space 42 , will be sufficient for fire extinguishing work.

Therefore, it is possible to install the foam generating unit 3, which has the fire extinguishing agent tank 30 and is difficult to miniaturize, in the lower space 43, which is a section in which it is relatively easy to secure a space. In other words, without miniaturizing the fire extinguishing agent tank 30, the fire hydrant unit 2 that needs to be installed in a relatively narrow space such as the guard passage 45 in the upper space 42 in the fire hydrant device 1 can be downsized and thinned. becomes possible.

Further, since the foam generating unit 3 is located in the lower space 43, the foam generating unit 3 is brought closer to the fire extinguishing pipe 47, and the fluctuation of the pressure of the fire extinguishing water is reduced, so that the operation of the mixer 31 becomes more stable. Since the lower space 43 has a certain amount of space, maintenance work such as replenishment of the fire extinguishing agent in the fire extinguishing agent tank 30 and disposal of the contents of the waste liquid tank 14 is facilitated.

Although the present invention has been described based on the above embodiments, the present invention is not limited to the above embodiments and can be modified as appropriate without changing the gist of the invention.

For example, (1) in the above embodiment, the water sprinkler (fire hydrant unit 2) is placed in the fire extinguishing target section (upper space 42) of the fire hydrant device 1, and the foam generation section (foam generation unit 3) is placed in the other section (lower space). 43), but it is also possible to install both in the section to be extinguished.

In this case, the foam generating section (foam generating unit 3) is thicker than the water spraying section (fire hydrant unit 2), but it can be embedded in the observer passage 45, and is separate from the foam generating section. Since the thinned water sprinkler can be installed on the observer passage 45, it is also possible to install the water sprinkler on the observer passage 45 and to install the foam generation unit so as to be embedded in the observer passage 45. .

(2) In the above embodiment, the fire hydrant valve 32b is provided inside the foam generating unit 3, but it may be provided separately from the foam generating unit 3 as long as it is on the primary side of the mixer 31.

(3) The check valve 12, the drain valve 13, and the waste liquid tank 14 are provided between the fire hydrant unit 2 and the foam generation unit 3 in the above embodiment, but on the secondary side of the mixer 31, the foam It may be provided within the generation unit 3 .

(4) In the above embodiment, the fire hydrant valve 32b is assumed to be opened by the wire 11 connected to the lever 25. However, for example, when the lever 25 is operated, the fire hydrant unit 2 may be opened as an electric valve or a solenoid valve. It is also possible to send a valve-open signal from to the fire hydrant valve 32b to open the valve. At that time, the signal may be transmitted by wire or wirelessly. Also, the signal line can be passed near the connection hose 10 in the same manner as the wire 11 .

The outline of the invention of the original application of the present application is added below.

[Summary of Invention]
[Problems to be solved by the invention]
Since a passageway for guards in a tunnel or the like is a relatively narrow space, it is required to reduce the size and thickness of the fire hydrant device installed there. A foam fire hydrant system requires a fire extinguishing agent tank for storing fire extinguishing agent, and the volume of the fire extinguishing agent tank is closely related to the fire extinguishing performance of the fire hydrant system, such as the amount of foam discharged. Therefore, the volume of the fire extinguishing agent tank must be designed so that the required amount of foam can be released in the event of a fire.

Since the fire extinguishing agent tank is stored in the housing of the fire hydrant device, in the conventional fire hydrant device, the size of the housing must be increased according to the volume of the fire extinguishing agent tank. This has been an obstacle to miniaturization and thinning.

Therefore, an object of the present invention is to provide a foam fire hydrant device that can be made smaller and thinner without impairing the performance of the foam fire hydrant device.

[Means to solve the problem]
The present invention is a fire hydrant device, and a water spray unit installed in a fire extinguishing target section of the fire hydrant device, and a foam installed at a position spaced apart from the water spray unit on the primary side and on the lower position side than the water spray unit. A generator and a fire hydrant valve for blocking the inflow of fire extinguishing water. and a lever for opening the fire hydrant valve is provided on the primary side of the mixer, and the water sprinkler and the foam generator are connected via a connection hose.

In the present invention, it is also possible to provide a check valve on the secondary side of the mixer. Also, in the present invention, it is possible to provide a drain valve on the secondary side of the check valve. Moreover, the present invention can further include a waste liquid tank for storing the waste liquid drained from the drain valve. In the present invention, the fire hydrant valve and the lever are each provided with a pulley, the pulley on the side of the fire hydrant valve has a larger diameter than the pulley on the side of the lever, and the operating angle of the lever is the same as that of the fire hydrant valve. It can be greater than the travel angle of the pulley.

[Effect of the invention]
In the present invention, the water spray part and the foam generating part are connected via a connection hose, and the fire hydrant valve can be opened by a lever provided in the water spray part. It is possible to install it in the section to be extinguished, and to install the foam generating part at a lower position than the water spraying part.

Therefore, in the present invention, it is possible to design the size of the housing of the water spraying unit without being directly affected by the size of the foam generating unit (in particular, the volume of the fire extinguishing agent tank). can be made smaller and thinner than a foam generator having a fire extinguishing agent tank. Therefore, the present invention can provide a smaller and thinner foam fire hydrant device without impairing the performance of the foam fire hydrant device.

1 Fire Hydrant Device 10 Connection Hose 11 Wire 12 Check Valve 13 Drain Valve 14 Waste Liquid Tank 2 Fire Hydrant Unit 20 Housing 20a Main Body 20b Top Board 20c Front Panel 20d Fire Hydrant Door 20e Fire Hydrant Door 20f Fire Extinguisher Door 20g Fire Extinguisher Door 21 Indicator Light 22 transmitter 23 fire extinguisher 24 fire hose 24a nozzle 25 lever 3 foam generation unit 30 fire extinguishing agent tank 31 mixer 32 fire hydrant valve unit 32a gate valve 32b fire hydrant valve 32c automatic pressure regulating valve 32d automatic drain valve 33 housing 34 siphon pipe 35 Chemical pipe 35a Chemical control valve 35b Chemical check valve 35c Chemical maintenance valve 36 Automatic drain valve 4 Tunnel 40 Wall portion 41 Floor plate 42 Upper space 43 Lower space 43a Space 44 Road surface 45 Observer passage 46 Fire hydrant installation portion 47 Fire extinguishing pipe

Claims (3)

A fire hydrant device installed in a tunnel in which the space is divided into an upper space and a lower space,
a water sprinkler installed in the upper space and having a fire extinguishing hose provided with a nozzle on the tip side ;
A foam generating unit installed in the lower space and having a fire extinguishing agent tank that stores a fire extinguishing agent and a mixer that mixes the extinguishing agent and the fire extinguishing water;
A fire hydrant valve that is provided on the primary side of the mixer and closes the inflow of fire extinguishing water from the fire extinguishing pipe ;
a check valve provided on the secondary side of the mixer,
The foam generating part is installed at a position spaced apart from the water spraying part on the primary side and on the lower position side than the water spraying part, and the water spraying part is made thin by being separate from the foam generating part,
A fire hydrant device, wherein the water sprinkler and the foam generator are connected via a connection hose. 2. The fire hydrant device according to claim 1, further comprising a drain valve provided on the secondary side of said check valve, and a waste liquid tank for storing waste liquid drained from said drain valve. The water spray unit is installed on a guard passage provided on both sides of the road surface of the tunnel,
3. The fire hydrant device according to claim 1, wherein said foam generator is installed so as to be embedded in said guard passage.

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