JPS6235495Y2 - - Google Patents

Description

[Detailed Description of the Invention] a. Field of Industrial Application The present invention relates to a fire hydrant valve used for 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, the user opens the main valve of the fire hydrant, goes to the fire scene with the nozzle, and pulls the fire hose 6. When the inner pipe 3 slides, the outer pipe 2 and the inner pipe 3 communicate with each other. By this, from the outer pipe 2 to the inner pipe 3
Water flows through it and water discharge begins.

According to such a conventional fire hydrant valve, although it can be operated by one firefighter, the water pressure in the outer pipe 2 acts on the side of the inner pipe 3, and when the bubble opens, the inner pipe is hit with considerable force. 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 nozzle 15 attached to one end of one fire hose 14, and a nozzle 15 attached to one end of the fire hose 14.
One end of 4 is connected to an inner pipe of the fire hydrant valve 16, which will be described later.

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 18 connected to a water supply port 17, and a cylindrical portion 19 of this outer pipe 18.
The valve is composed of an inner tube 20, a portion of which is slidably fitted into the inner tube, and is opened and closed by sliding the inner tube 20. The outer tube 18 has a claw portion 21 biased by a spring (not shown) on the inner surface of the opening end on the water supply port 17 side, and is rotatably fitted into the water supply port 17 via the claw portion 21. There is.

A valve body 22 is disposed on the axis of the cylindrical portion 19 of the outer tube 18.
is supported, and when the inner tube 20 is fitted into or separated from the valve body 22, the valve is opened and closed. The valve body 22 consists of two discs 2 made of bowl leather 23.
4 and 25, and the opposing surface 19a of the cylindrical portion 19 is secured by a bolt 26 passing through the center thereof.
is supported by An O-ring 27 is disposed on the inner circumferential surface of the outer tube 18 on the opening side to maintain the watertightness of the opening. 20 Gap 2 between the tip and the outer peripheral surface
8 is provided. Through this gap 28, the inner tube 20
Water pressure acts on the end face of the tip to help pull out the inner tube 20 when it slides. Locking portions 18a, 18 are provided on the inner wall surface of the outer tube 18 to lock onto protrusions 20a protruding from the tip and outer peripheral surface of the inner tube 20.
b is provided protrudingly.

The water spray nozzle 15 is supported by a holder 29 attached to the back side of the door 12.
The fire hose 14 is pulled out by holding it and running. 30 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.
Then, when the fire hose 14 is fully extended and pulled, the inner pipe 20 connected to the base of the fire hose 14 slides, and the inner pipe 20 separates from the valve body 22. The valve is opened. At this time, since water pressure is acting on the end face of the distal end of the inner tube 20 through the gap 28, the valve can be opened with a small amount of force.

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 may be separated and the front hose base may be directly connected to the inner pipe 20 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, a support member 32 having a water passage hole 32a formed in the plate surface is provided inside the linear outer tube 31, and the valve body 22 is mounted on the support member 32. On the other hand, the diameter of the wall surface of the outer tube 31 corresponding to the valve body 22 is increased so that the flow path becomes larger. 32
b is a locking portion provided on the support member 32 for locking the inner tube 20.

As a result, the inner pipe 20 slides and the valve body 22
When the support member 32 is separated from the support member 32, water flows into the inner pipe 20 through the water passage hole 32a of the support member 32, and water starts to be sprayed from the water spray nozzle via the fire hose 14. At this time, since water pressure is acting on the end surface of the inner tube 20, the inner tube 20 can be easily separated from the valve body 22.

g. Effects 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 it can be easily opened by a single firefighter. Able to carry out fire extinguishing activities. Furthermore, since a valve body 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 the drawing]

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. FIG. 2 is a partial cross-sectional view showing a fire hydrant valve according to an example. 10... Fire hydrant box, 14... Fire hose, 15... Nozzle, 16... Fire hydrant valve,
18, 31...Outer pipe, 19...Cylinder part, 20...Inner pipe, 22...Valve body, 28...Gap.

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 supported by the outer tube and fitted into the inner tube, a base of a hose connected to the tip of the inner tube, and sliding on the inner tube by pulling the tip of the hose. A valve for a fire hydrant, characterized in that the valve is opened by separating from the valve body. (2) The fire hydrant valve according to claim 1, which is characterized in that the outer pipe is a right-angled outer pipe. (3) The fire hydrant valve according to claim 1, which is characterized in that the outer pipe is a linear outer pipe.