JPH02126865A - Waiting type automatic opening and closing valve - Google Patents

Abstract

PURPOSE:To enable the feed of a fluid after the lapse of a fixed time by provid ing an extension pipe in the top end part of an inner pipe of a waiting type automatic opening and closing valve and making the extension pipe contain a valve body released by the sliding of the inner pipe. CONSTITUTION:In a fire, a person takes out a nozzle from a fire hydrant, opens a main valve and then goes to the fire field. Water is introduced into an outer pipe 2 by the opening of the main valve and run into an inner pipe 4 through a small hole 4a. The water is gradually charged in a secondary cham ber formed of the inner pipe 4, a regulating pipe 7 and an extension pipe 5, and the chamber is fulfilled within a fixed time. The pressure of the secondary chamber is increased to slide the extension pipe 5, whereby the inner pipe 4 is released. Thus, the inner pipe 4 is slidingly moved and communicated with the outer pipe 2, while a valve body 8 is separated from a valve seat 5b by a chain 12 to release the valve, and the feed water is started. As the valve is thus released after the lapse of a fixed time, the time from opening of the main valve to extension of the hose can be maintained.

Description

[Detailed description of the invention] a. Industrial application field The present invention relates to a standby automatic on-off valve.

b. Conventional technology When using a fire hydrant in the event of a fire, the hose stored in the storage box is pulled out, one of the fire extinguishers holds the water nozzle, and another fire extinguisher opens the hydrant valve to let water flow through. , are conducting fire extinguishing work. Therefore, when there is only one person with a fire extinguisher, it is virtually impossible to open the fire hydrant valve while holding the water discharge nozzle because the water pressure at the fire hydrant is high.

Therefore, an application was previously filed for a fire hydrant valve (Utility Application No. 59-28400) as shown in Fig. 3, which allows for easy raking with a single fire extinguisher.

In this fire hydrant valve, a cylindrical inner pipe 102 is slidably fitted into a right-angled outer pipe 101 which is rotatably fitted into a water supply port 100, and between the outer pipe 101 and the inner pipe 102. is equipped with O-rings 103 and 104 to ensure watertightness. On the other hand, a fire hose 105 is attached to the tip of the inner tube 102, and a nozzle (not shown) is attached to the tip of the fire hose 105.

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 105. When the inner pipe 102 slides, the outer pipe 101 and the inner pipe 102 communicate with each other. As a result, water flows from the outer tube 102 through the inner tube 102, and water discharge is started.

According to such a fire hydrant valve, although damp watering can be performed using a single fire extinguisher, the water pressure inside the outer pipe 101 acts on the side surface of the inner pipe 102. Therefore, the inner diameter is 4f) us
It is used for hoses with a water pressure of usually 4 kg/cd.
, a pulling force of 12 kg is required, and the water pressure is 7 kg.
g/c-, a pulling force of 20 kg is required, so the inner tube 102 must be pulled with considerable force when opening the valve. Therefore, it is difficult for a person who is inexperienced to operate the valve or a person with limited strength such as a woman to operate it. and fire hose 10
I thought I was subtracting 5, but actually the inner tube was 10.
2 may not slide and water discharging may not start, so try again.
Operations such as pulling the fire hose 105 are required.

Therefore, a fire hydrant valve (Japanese Patent Application No. 168405/1982) is known in which a small hole is provided in the inner tube and a valve body is provided in the inner tube.

According to this prior art, water is injected into the inner tube through the small hole, and when the inner tube is filled with water, the inner tube slides due to the water pressure and opens the valve.

C1 Problem to be Solved by the Invention However, since the volume inside the inner pipe is limited, it is suitable for extending a hose with an inner diameter of 40 m by about 30 m for indoor fire hydrants, but for outdoor fire hydrants with an inner diameter of 50 or 65 m.
If several hoses with a length of 20+* were connected, there was a risk that water would start discharging before reaching the site.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above problems and provide a standby automatic on-off valve that can supply fluid after a certain period of time has elapsed.

d. Means for Solving the Problems In order to solve the above problems, the present invention includes an outer pipe provided on the main stopper side, and an inner pipe whose one end is slidably fitted into the outer pipe. sliding the inner tube by the pressure of fluid introduced into the inner tube through a passage communicating between the inside of the outer tube and the inside of the inner tube;
In the standby automatic on-off valve that directly communicates the inside of the outer pipe with the inside of the inner pipe, an extension pipe is interposed at the tip of the inner pipe, and the extension pipe has a built-in valve body that opens when the inner pipe slides. be.

e. Opening of the source valve allows fluid to be introduced into the inner tube through the small hole. The fluid introduced into the inner tube fills the inner tube and the extension tube,
Slide the extension tube and inner tube.

The valve body is opened by sliding the inner pipe, and fluid is supplied.

f. Example Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a sectional view showing a standby automatic on-off valve.

In the figure, the standby automatic on-off valve includes an L-shaped outer pipe 2 connected to a water supply port 1, an inner pipe 4 that is partially slidably fitted into the cylindrical part 3 of the outer pipe 2, and It consists of an extension tube 5 connected to the tip of this inner tube 4.

The outer tube 2 has a claw part 6 biased by a spring (not shown) on the inner surface of the opening end on the side of the water supply port 1, and is rotatably fitted into the water supply port l via the claw part 6. There is.

The inner pipe 4 constitutes a primary valve that blocks the flow path of the outer pipe 2,
In addition, a small hole 4a communicating with the outer tube 2 is bored in the side wall surface of the inner tube 4. The extension pipe 5 is connected to the tip of the inner pipe 4 via a regulating pipe 7, and a valve body 8 is provided inside the extension pipe 5.
is installed inside and constitutes a secondary valve. ii The joint pipe 7 is provided with joint parts 9.9□ at both ends, and is connected to the joint parts 10.11 of the inner pipe 4 and the extension pipe 5'', respectively.1ll
The length of the lff pipe 7 is set in consideration of the length of the hose and the time it takes to carry the hose and reach the fire scene.

The valve body 8 has a chain 12 attached to a lid portion 2a that closes the rear end of the outer tube 2.
The extension tubes 5 are connected to each other via the extension tube 5, and are positioned within the large diameter portion Sa by sliding the extension tube 5. 5b is extension tube 5
The valve seat 13 provided inside is a stopper provided inside the extension tube 5, which is a circular plate with radial holes. 14 is a hose connected to the tip of the extension tube 5;
A nozzle (not shown) is provided at its tip.

According to the above configuration, in the event of a fire, the nozzle is taken out from the fire hydrant, the main hydrant is opened, and the person heads to the fire scene.

When the main valve is opened, water is introduced into the outer tube 2, and the small hole 4a
It flows into the inner tube 4 through the tube. The water introduced into the inner pipe 4 is transferred to the inner pipe 4. The secondary chamber formed by the adjustment tube 7 and the extension tube 5 gradually fills up, and becomes full in a certain period of time. Then, the pressure in the secondary chamber increases, causing the extension tube 5 to slide and the inner tube 4 to open. In this way, the inner tube 4 slides and the outer tube 2 and the inner tube 4 are directly connected, while the valve body 8 moves away from the valve seat 5b to open the valve and water supply is started.

g. Effects of the Invention As described above, according to the standby automatic opening/closing valve according to the present invention, the valve is opened after a certain period of time has elapsed, so the time from opening the main pulp to stretching the hose can be secured. Can be done.

In particular, by applying the present invention to a fire hydrant, a single operator can easily extinguish a fire.

[Brief explanation of drawings]

FIGS. 1 and 2 are sectional views showing a standby automatic on-off valve according to an embodiment of the present invention, and FIG. 3 is a sectional view showing a conventional automatic on-off valve for a fire hydrant. 1...Water supply port, 2...Outer pipe, 4...Inner pipe, 5...Extension pipe, 7...Adjustment pipe,
8... Valve body. Figure Figure

Claims (1)

[Claims] Comprising an outer tube provided on the main stopper side and an inner tube having one end slidably fitted into the outer tube, the fluid is introduced into the inner tube through a passage communicating between the outer tube and the inner tube. In a standby automatic on-off valve that slides the inner pipe under pressure and directly communicates the inside of the outer pipe with the inside of the inner pipe, an extension pipe of a set length is interposed at the tip of the inner pipe, and the inner pipe is connected to the extension pipe. A standby automatic opening/closing valve characterized by having a built-in valve body that opens by sliding.