JPS6226114Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a fire hydrant device, particularly a fire hydrant device disposed in a motorway tunnel.

Fires in motorway tunnels are mainly caused by the ignition of gasoline during collisions, and the propagation speed of combustion is extremely fast, so rapid initial extinguishing is required. By the way, on both sides of the tunnel, there is an inspection corridor about 1m high and about 1m wide for the walking safety of observers. A fire hydrant system is desired that allows water to be sprayed while standing on the road without having to climb up.

As a fire hydrant device that meets these demands, there is a device described in Japanese Utility Model Application Laid-open No. 54-131398. In this system, a hose reel that can swing around a vertical axis is placed inside a fire extinguishing box, and a water supply pipe that supplies water to the hose wound around this hose reel is connected to a water supply base pipe, an intermediate water supply pipe, and a hose reel section. Consisting of three water supply pipes, the intermediate water supply pipe is arranged on the back of the forward-tiling door, and a manual valve is installed on this intermediate water supply pipe, and the water supply is installed between the intermediate water supply pipe and the water supply base pipe, and between the intermediate water supply pipe and the hose reel section. It is characterized in that the tubes are connected by flexible tubes. According to this conventional example, since the water spraying operation can be performed using a manual valve provided on the back side of the forward-tilting door, the operator can perform the water spraying operation without climbing into the inspection gallery. However, since the entire amount of water passes through the intermediate water supply pipe, it is necessary to install piping with dimensions that match this and a manual valve.
These dimensions must be quite large. Therefore, the weight of the intermediate water supply pipe and the manual valve that are loaded on the forward-tilting door becomes large, making it difficult to open and close the forward-tilting door smoothly, resulting in a drawback that prompt firefighting operations are hindered.

Another disadvantage is that the intermediate water supply pipe and manual valve cannot be designed compactly, leading to increased costs. Furthermore, in the conventional example described above, since the water pressure discharged from the hose cannot be changed when the hose is fully open, there is also the drawback that firefighting in a tunnel cannot be carried out with the desired water pressure.

The fire hydrant device of the present invention corrects the drawbacks of the conventional example described above, and as shown in the drawing, one embodiment of the fire hydrant device includes a hose reel 1 configured to be able to swing around a vertical axis P in a fire extinguishing box 2. A water supply pipe 4 that supplies water to the hose 3 wound around the hose reel 1 is provided with a release valve 5 with a pressure reducer, and the release valve 5 with a pressure reducer branches off from the release valve 5 and is connected to the water supply pipe 4 that supplies water to the hose 3 wound around the hose reel 1. It is characterized in that a control pipe 6 for opening the water and a manual valve 7 for opening and closing the drainage channel of the control pipe 6 are arranged on the back surface 8 of the forward-tilting door.

The present invention will be specifically explained below based on the above embodiments. A forward tilting door 8 is attached to the front of the fire extinguishing box 2 so that it can be opened and closed via pivots 9, 9 and shock absorbers 10, 10, and stoppers 11, 11 are installed so that the forward tilting door 8 becomes approximately horizontal when the door is opened. establish. Hose reel 1 placed inside fire extinguisher box 2
is configured to be able to swing around a vertical axis P. In the illustrated example, a rotation joint 1 is installed between a pair of upper and lower channel members 12, 12, which are buried and fixed in the upper and lower wall surfaces of a box storage space provided on a tunnel side wall.
A reel support frame 14 is swingably mounted via the support frame 14, and a horizontal shaft 16 is pivotally supported between both sides 15, 15 of the support frame 14, and the hose reel 1 is supported rotatably around the horizontal shaft 16. This horizontal axis 16 is the center line of the rotation joints 13, 13, that is, the vertical axis P
The hose reel 1 is placed at an eccentric position relative to the hose reel 1, so that it protrudes forward when the hose reel 1 is rotated 90 degrees from the stored state, as shown by the imaginary line in FIG.

The base end of the hose 3 wound around the hose reel 1 is connected to the tip 17 of the water supply pipe 4. In addition, the water supply pipe 4 here is a concept that also includes a water supply channel provided integrally with the support member of the hose reel 1. A fire extinguishing nozzle 18 provided at the tip of the hose 3
It is removably supported by engaging metal fittings 19, 19 provided on the back surface of.

A water supply pipe 4 disposed within the fire extinguishing box 2 is provided with a release valve 5 equipped with a pressure reducing device. As an example of this release valve 5 is shown in FIG. By seating the valve seat 24, both flow paths 20,
21, while the water in the primary flow path 20 is configured to reach the control port 26 through the pore 25 provided in the valve body 23. A control pipe 6 for opening the release valve 5 arranged on the back side of the forward-tiling door 8 is connected to the control port 26 via a flexible pipe 27. When the manual valve 7 provided in the control pipe 6 is closed, the back pressure of the valve body 23 increases and the valve is closed. On the other hand, when the manual valve 7 is opened, water is discharged from the control pipe 6 to the outside, so the back pressure of the valve body 23 decreases and the valve opens, and the water on the primary side flows into the secondary side, and the water is discharged to the outside from the control pipe 6. Reach 3. At this time, the flow path of the water flowing between the valve body 23 and the valve seat 24 is constricted and bent, so that the pressure is reduced. The degree of this pressure reduction can be adjusted by vertically moving the spindle 28 provided on the release valve 5.

The manual valve 7 has a forward tilting door 8 as shown in FIG.
It is located as far forward as possible to make it easier for the operator to operate the door when opening the door. In addition, 29 is a spigot for the fire brigade, and 30 is a rubber hose attached to the tip of the control pipe 6, which allows water flowing through the control pipe 6 to be guided to the outside of the fire extinguishing box 2. Also 31,3
1 is a metal fitting for fixing the control pipe 6 to the back surface of the forward-tiling door 8.

Since the present invention is constructed as described above, the forward tilting door 8
The diameter of the control pipe 6 disposed on the back surface of the control pipe 6 may be determined so as to maintain or allow water to flow out in an amount sufficient to control the release valve 5 with a pressure reducing device. Since this amount of water is much smaller than the amount of water flowing through the water supply pipe 4,
The diameter of the control pipe 6 can be reduced to about one third of that of the water supply pipe 4. Therefore, the control pipe 6
The manual valve 7 can be made smaller in diameter and lighter in weight than the intermediate water supply pipe and manual valve of the conventional example. As a result, the weight loaded on the forward-tilting door 8 is significantly reduced, and the forward-tilting door can be opened and closed smoothly, thereby ensuring prompt firefighting.

Furthermore, by making the piping on the back side of the forward-tilting door 8 and the manual valve 7 more compact, costs can be reduced. For example, the piping (intermediate water supply pipe) in the device described in Japanese Utility Model Application Publication No. 54-131398 uses a 11/2 inch diameter manual valve with a size suitable for this, but the cost of this manual valve is is approximately 11,000 yen. In contrast, in the present invention, the piping (control pipe)
6 can be of 1/2 inch diameter and a suitable compact manual valve 7 can be used. The cost of this manual valve 7 is approximately 2000 yen,
Compared to the conventional example described above, a significant cost reduction can be achieved.

According to the present invention, in addition to the above-mentioned effects, it is possible to reduce the pressure of the primary side pressure water and send the secondary side pressure water having the desired water pressure to the hose by using the release valve 5 with a pressure reducing device. Firefighting activities will be ensured.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a perspective view thereof, FIG. 2 is a side view thereof, and FIG. 3 is a sectional view showing an example of a release valve with a pressure reducing device. 1...Hose reel, 2...Fire extinguisher box, 3
... Hose, 4 ... Water supply pipe, 5 ... Release valve with pressure reducing device, 6 ... Control pipe, 7 ... Manual valve, 8 ... Forward tilting door.

Claims (1)

[Scope of utility model registration request] A hose reel configured to be able to swing around a vertical axis is placed inside the fire extinguishing box, and a release valve with a pressure reducing device is provided on the water supply pipe that supplies water to the hose wound around the hose reel. A control pipe that opens the release valve with a pressure reducing device when branching and draining water, and a manual valve that opens and closes the drainage channel of the control pipe,
A fire hydrant device characterized by being installed on the back side of the front-tiling door.