JPH02126866A - 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 internally installing an opening and closing valve to each of slidingly movable outer pipe and inner pipe, forming a leakage hole in the opening and closing valve on the upper stream side, sliding the outer pipe and the inner pipe by the pressure of the fluid in a storage chamber divided by the both opening and closing valves, and opening the opening and closing valve on the lower stream side later than the opening and closing valve on the upper stream side. CONSTITUTION:In a fire, a person opens a fire hydrant end goes direct to the field with a nozzle. Water is reached to an opening and closing valve 5 by the release of the main valve and run into a storage chamber 7 through a leakage hole 9 of the opening and closing valve 5. When the storage chamber 7 is fulfilled with water after the lapse of a fixed time, ar outer pipe 1 and an inner pipe 2 are slidingly moved and extended to the separating direction. Then, an elastic wire 10 is stretched to release the opening and closing valve 5, and when the inner pipe 2 is further slid, a chain 16 is stretched to release an opening and closing valve 6, and the release of water is started. The release of water can be thus extended until a fixed time passes from the release of the main valve, a sufficient waiting time can be maintained.

Description

[Detailed description of the invention] a. Industrial application field The present invention relates to a timing type 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 firefighter holds the water nozzle, and another firefighter opens the hydrant valve to let water flow through. , are conducting fire extinguishing work. Therefore, when there is only one firefighter, the water pressure at the fire hydrant is so high that it is virtually impossible to open the fire hydrant valve while holding the water discharge nozzle.

Therefore, an application was previously filed for a fire hydrant valve (Utility Application No. 59-28400) as shown in Fig. 3, which can be easily operated by a single firefighter.

This fire hydrant valve is mainly used for indoor fire hydrants, and has a cylindrical inner pipe 102 slidably fitted into a right-angled outer pipe 101 rotatably fitted to a water supply port 100.
An O-ring 1 is installed between the outer tube 101 and the inner tube 102.
03 and 104 are arranged to obtain 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, open the main valve of the fire hydrant, go to the fire scene with the nozzle, and pull the fire hose 105, and the inner pipe 102 will slide and the outer pipe 101 and the inner pipe 102 will communicate with each other. As a result, water flows from the outer tube 101 through the inner tube 102, and water discharge is started.

According to such a fire hydrant pulp, it can be operated with one fire extinguisher, but the water pressure inside the outer pipe 101 acts on the side of the inner pipe 102, and it is used for a hose with an inner diameter of 405 m, and the water pressure is usually 4 kg. /cd, a pulling force of 12 kg is required, and when the water pressure is 75 kg/C-, a pulling force of 20 kg is required. For this reason, when opening the pulp, the inner tube 102 must be pulled with considerable force. Therefore, a person who is inexperienced with the operation or a weak person such as a woman may operate the inner tube 102 while thinking that the fire hose 105 is being pulled. However, in reality, sometimes the inner pipe 102 does not slide and water discharging does not start, and the fire hose 1
An operation such as subtracting 05 is 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 water pressure is lowered and the inner tube slides, opening the valve.

Problems to be Solved by the C0 Invention However, since the volume inside the inner pipe is limited, there is a risk that the inner pipe will be filled in a short period of time and that water will start discharging before reaching the site.

Therefore, outdoor fire hydrants use many long fire hoses connected together, making it difficult to secure enough time to reach the scene.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and provide a timing 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 on-off valve inside each of the outer pipe and the inner pipe that are slidably fitted to each other, and the on-off valve is provided on the upstream side of these on-off valves. A leak hole is formed in the on-off valve,
The pressure of the fluid introduced into the storage chamber partitioned by the two on-off valves causes the outer tube and the inner tube to slide in the direction of separating them from each other, and the sliding action of the outer and inner tubes causes the two on-off valves to move away from each other. A means for opening the valve is provided internally, and the opening means is adjusted so as to open the on-off valve on the downstream side later than the on-off valve on the upstream side.

e. When the main valve for supplying the working fluid is opened, the fluid is gradually stored in the storage chamber through the leak hole of the on-off valve on the upstream side. When the fluid in the storage chamber becomes full, the outer tube and the inner tube gradually slide to expand the storage chamber. Then, when the outer pipe and the inner pipe are separated by a certain distance, the on-off valve on the upstream side opens, and the storage chamber is directly connected to the main valve side. Then, the fluid pressure speeds up the sliding of the outer and inner tubes,
further apart. In this way, the on-off valve on the downstream side opens and supplies fluid.

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 timing type automatic on-off valve.

In the figure, the timing type automatic on-off valve is composed of an outer pipe 1 connected to the main valve side and an inner pipe 2 connected to the nozzle side. The outer tube 1 may be directly connected to a water supply port (not shown) on the main valve side via a joint portion 3 at one end, or may be connected via a hose.

The inner tube 2 is connected to a hose via a joint portion 4 at one end, and is connected to a nozzle (not shown) via a plurality of hoses.

An on-off valve 5.6 is installed in each of the outer pipe 1 and the inner pipe 2, which temporarily cuts off the water supply from the main valve side and forms a storage chamber 7 between the two on-off valves 5.6. . The on-off valve 5 provided in the outer tube 1 uses a butterfly valve, and the valve body 8 is provided with a water leak hole 9 for water leakage. This valve body 8
An elastic binding lO made of rubber or the like is connected to the inner tube 2 at one end.

The on-off valve 6 provided in the inner tube 2 is composed of a valve body 11 made of an elastic material such as rubber and a valve seat 11a. A handle 13 for returning the valve body 11 is provided.

The connecting rod 12 is slidably supported on the axis of a support ring 14 provided on the inner surface of the inner tube 2, and connects a ring portion 12a at the rear end with a support ring 15 provided on the inner surface of the outer tube 1. 1
They are connected via 6. The support rings 14 and 15 are formed by connecting large and small rings with radial ribs, and the outer large-diameter rings are fixed to the inner peripheral surfaces of the outer tube 1 and the inner tube 2, respectively. The chain 16 is connected to the ring portion 12 of the connecting rod 12.
a and a fixed rod 17 fixed on the axis of the support ring 15.
The ring portion 17a is connected with a margin. The relationship between the elastic edge lO and 1116 is as follows:
slides in the direction of separation, and when it reaches a predetermined width, the elastic edge 1
0 is set to the length that causes the on-off valve 5 to open. When the sliding width of the outer tube 1 and the inner tube 2 reaches a set width, the chain 16 is tightened and the on-off valve 6 is opened.

Next, the operation of the timing type automatic on-off valve will be explained.

In the event of a fire, the main valve of the fire hydrant is opened, and water reaches the opening/closing valve 5 and is shut off by opening the main valve of the fire hydrant and going directly to the scene with the nozzle. The water that has reached the on-off valve 5 flows into the storage chamber 7 through the leak hole 9 of the on-off valve 5. and,
When the storage chamber 7 becomes full of water after a certain period of time has elapsed, the inner tube 2 slides with respect to the outer tube 1 and expands in a direction away from each other. As a result, the storage chamber 7 continues to be filled with water while expanding, and the elastic edge 10 is stretched, opening the on-off valve 5 and directly connecting the storage chamber 7 and the main valve side. Then, when the inner tube 2 slides further, il[16 is stretched, opening the on-off valve 6. In this way, water spraying begins.

g. Effects of the invention As stated above, the timing automatic on-off valve according to the present invention has the following advantages:
Water can be postponed until a certain period of time has elapsed after the main hydrant is opened, so it is possible to secure sufficient timing when it is necessary to reach the site by holding the nozzle, such as when using an outdoor fire hydrant. can. Moreover, the timing type automatic on-off valve can further extend the timing time by interposing it between each of a plurality of hoses.

[Brief explanation of drawings]

FIGS. 1 and 2 are cross-sectional views showing one embodiment of the timing automatic on-off valve of the present invention, and FIG. 3 is a cross-sectional view showing a conventional fire hydrant valve. l...outer tube, 2...inner tube, 3.4...
・Joint part, 5.6... Opening/closing valve, 7... Storage chamber, 8, 11... Valve body,... Water leak hole, 10... Elastic edge, 12... Connection port door. , 14.15...support ring, 16...chain. Patent Applicant Teikoku Textile Co., Ltd. (and 2 others) Figure

Claims (1)

[Claims] An on-off valve is installed inside each of the outer pipe and the inner pipe that fit slidably into each other, and a water leak hole is formed in the on-off valve provided on the upstream side of these on-off valves, so that the water is separated by both of the on-off valves. Internally equipped with a means for sliding the outer tube and the inner tube in a direction away from each other by the pressure of the fluid introduced into the storage chamber, and opening both the on-off valves by the sliding action of the outer tube and the inner tube, A standby automatic on-off valve characterized in that the opening means is adjusted to open the on-off valve on the downstream side later than the on-off valve on the upstream side.