JPS6317489Y2 - - Google Patents

Description

[Detailed Description of the Invention] a. Field of Industrial Application The present invention relates to a fire hydrant valve used in a fire hydrant in a building, etc., and relates to an improvement of a fire hydrant valve that facilitates the opening operation of the valve.

b Prior art When using a fire hydrant in the event of a fire, the hose stored in the storage box is pulled out, one firefighter holds the water nozzle, and another firefighter opens the hydrant valve to let water flow through, extinguishing the fire. work is being done. Therefore, when there is only one firefighter, the water pressure at the hydrant is so high that it is virtually impossible to open the hydrant valve while holding the water discharge nozzle.

Therefore, a fire hydrant valve is used, as shown in Figure 1, which can be easily operated by a single firefighter.

In this fire hydrant valve, a cylindrical inner pipe 3 is slidably fitted into a right-angled outer pipe 2 which is rotatably fitted into a water supply port 1, and a cylindrical inner pipe 3 is fitted between the outer pipe 2 and the inner pipe 3. is O
Rings 4 and 5 are arranged to provide watertightness. On the other hand, a fire hose 6 is attached to the tip of the inner pipe 3.
A nozzle (not shown) is attached to the tip of the fire hose 6.

In the event of a fire, open the main valve of the fire hydrant, go to the fire scene with the water nozzle in hand, and pull the fire hose 6, the inner pipe 3 will slide and the outer pipe 2
and the inner pipe 3 communicate with each other. As a result, water flows from the outer tube 2 through the inner tube 3, and water discharge is started.

According to such a conventional fire hydrant valve, although it can be operated by one firefighter, the water pressure inside the outer pipe 2 acts on the side of the inner pipe 3, and when the valve is opened, a considerable force is applied to the inner pipe. I had to subtract 3. In addition, there is a risk that the O-ring 4 for ensuring watertightness between the outer tube 2 and the inner tube 3 will come off due to water pressure when the inner tube 3 slides, making it difficult to maintain watertightness. It was hot.

c. Purpose of the invention The purpose of the invention is to provide a fire hydrant valve that can solve the above-mentioned drawbacks of the prior art, maintain sufficient watertightness, and be easily operated by a single firefighter. shall be.

d. Structure of the invention Hereinafter, the invention will be explained in detail with reference to the illustrated embodiments.

FIG. 2 is a perspective view showing a front-folding fire hydrant box, and FIGS. 3 a and 3 b are partial sectional views showing a right-angled fire hydrant valve.

In FIG. 2, a fire hydrant box 10 is equipped with a front-folding door 12 on the front side of a box body 11, and two shafts 13 are protruded from the back side of the door 12 at a predetermined interval. A fire hose 14 is wound around this shaft 13 to support it. Two fire hoses 14 are connected and stored, with a water discharge nozzle 15 attached to one end of one fire hose 14, and one end of the other fire hose 14 connected to a fire hydrant valve 16, which will be described later. connected to the pipe.

This fire hydrant valve 16 will be explained with reference to FIGS. 3a and 3b.

This fire hydrant valve 16 includes an L-shaped outer pipe 17 consisting of a base 17a and a cylindrical part 17b, an inner pipe 18 that is partially slidably fitted into the cylindrical part 17b of the outer pipe 17, and the outer pipe 17. It is comprised of a butterfly-type on-off valve 19 that opens and closes by the sliding movement of the inner tube 18 provided at the inner base 17a. The outer tube 17 is provided with a claw portion 20 on the inner surface of the open end of the base portion 17a, which is biased by a spring (not shown).
It is rotatably fitted into the water supply port 21 via.
The on-off valve 19 includes a valve body 22 provided on the inner surface of the base 17a of the outer tube 17, and a link 23 for operating the valve body 22. The valve body 22 is rotatably supported within the outer tube via a shaft 22a passing through the center of the disc. The link 23 is
A V-shaped arm 23a connected to the shaft 22a of the valve body 22 and the peripheral edge of the valve body, and an arm 23 rotatably connected to the base end of this arm 23a and the inner tube 18.
b, and opens and closes the on-off valve 19 by rotating the valve body 22 around the shaft 22a in response to the sliding movement of the inner pipe 18. The above outer tube 17
A locking portion 17c is provided on the inner surface of the base portion 17a, which abuts against the outer periphery of the valve body 22 and maintains watertightness.

The water spray nozzle 15 is supported by a holder 24 attached to the back side of the door 12.
The fire hose 14 is pulled out by holding it and running. 25 is a fire hose 14 when stored
It is a support arm that prevents it from unraveling.

e Function of the invention Next, the function of the fire hydrant valve of the invention will be explained.

In the event of a fire, the firefighter first opens the door 12, presses the alarm switch to report the occurrence of a fire, and presses the pump start switch.

Next, when the water spray nozzle 15 is removed and the fire hose 14 is moved toward the fire point, the fire hose 14 is aligned with the shaft 1.
3, and the fire hydrant valve 16 changes direction following the extending direction of the fire hose 14.
When the fire hose 14 is fully extended and pulled, the inner pipe 18 connected to the base of the fire hose 14 slides, and the valve body 22 rotates around the axis via the link 23. Then, the on-off valve 19 opens.

As a result, water is passed toward the water spraying nozzle 15, and water spraying work can begin. Thus,
Fire extinguishing operations can be carried out quickly and smoothly by one firefighter.

In this case, if the fire point is nearby and two fire hoses are not required, the connection can be separated and the front hose base can be directly connected to the inner pipe 18 of the fire hydrant valve 16. .

f Other embodiments Figures 4a and b show other embodiments in which the present invention is applied to a linear fire hydrant valve, and the same parts as in Figures 3a and b are given the same reference numerals and explained. is omitted.

In this case, an on-off valve 19 is provided in the cylindrical portion 26a of the linear outer tube 26, and this on-off valve 19 is connected to the shaft 26a.
The valve body 22 supported by the valve body 2a and the inner pipe 18 are connected by a link 27.

As a result, when the fire hose 14 is pulled, the inner pipe 18 slides, and the valve body 2
The valve body 2 is
2 to open the on-off valve 19 as shown in Fig. 4b.
This is for open operation.

g Effect of the invention As mentioned above, according to the fire hydrant valve of the invention, the valve can be easily opened by simply pulling the fire hose, so a single firefighter can easily extinguish a fire. Can carry out activities. Furthermore, since an on-off valve is provided that opens and closes by sliding the inner tube, complete watertightness can be obtained and the opening and closing operations can be performed reliably.

[Brief explanation of drawings]

Figure 1 is a sectional view showing a conventional fire hydrant valve;
FIG. 2 is a perspective view showing a front-loading fire hydrant box, FIGS. 3 a and b are partial cross-sectional views showing a fire hydrant valve according to an embodiment of the present invention, and FIGS. 4 a and b are views of another embodiment of the present invention. It is a partial sectional view showing a fire hydrant valve by an example. 10... Fire hydrant box, 14... Fire hose, 15... Water discharge nozzle, 16... Fire hydrant valve, 17, 26... Outer pipe, 18... Inner pipe, 19
...Opening/closing valve, 22... Valve body, 23, 27... Link.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) An outer tube that is connected to a water supply port and changes direction following the direction of extension of the hose, and an inner tube that is slidably fitted into the cylindrical portion of the outer tube. , a valve body rotatably supported within the outer tube via a shaft, a link provided between the valve body and the tip of the inner tube, and a base of the hose at the tip of the inner tube. A valve for a fire hydrant, characterized in that the on-off valve is opened and closed by the sliding movement of the inner pipe. (2) The fire hydrant valve according to claim (1) of the utility model registration claim, characterized in that the outer pipe is a right-angled outer pipe. (3) The fire hydrant valve according to claim (1) of the utility model registration claim, characterized in that the outer pipe is a straight type outer pipe.