JPH0445729Y2 - - Google Patents

Description

[Detailed Description of the Invention] a. Field of Industrial Application The present invention relates to a fire hydrant valve that uses a fire hydrant in a building, etc., and relates to a fire hydrant valve that facilitates the opening operation of the 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. Fire extinguishing work is underway. 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, we first filed an application for a fire hydrant valve (Utility Application No. 59-28400) as shown in Figure 4, which can be easily operated by a single firefighter.

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.
O-rings 103 and 104 are arranged between the two and 02 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 main valve of the fire hydrant is opened, the nozzle is taken to the scene of the fire, and when the fire hose 105 is pulled, the inner pipe 102 slides and the outer pipe 101 and the inner pipe 102 communicate with each other. By this,
Water flows from the outer tube 101 through the inner tube 102, and water discharge is started.

c. Problems to be solved by the invention According to such a fire hydrant valve, it can be operated by one firefighter, but the water pressure in the outer pipe 101 acts on the side of the inner pipe 102, and the water pressure is normally reduced. When the pressure is 4 kg/cm ² , a pulling force of 12 kg is required, so the inner tube 102 must be pulled with considerable force when opening the valve. For this reason, when a person who is inexperienced with the operation or a person with limited strength such as a woman is trying to pull the fire hose 105, the inner pipe 102 does not slide and water starts to be discharged. In some cases, the fire hose 105 may not be activated, and operations such as pulling the fire hose 105 again are required.

It is an object of the present invention to provide a fire hydrant valve that solves the above-mentioned problems and allows even a single operator or a weak person such as a woman to easily extinguish a fire.

d Means for Solving the Problems The present invention consists of an L-shaped outer tube that is connected to a water supply port through one open end and has a flow path orthogonal to the other, and the base of a hose is connected to the tip. , and an inner tube coaxially inserted from the other open end of the outer tube to block the flow path and insert the rear end side, and the valve for a fire hydrant is configured to open the flow path by pulling out the inner tube. A small-diameter portion is formed at the rear end of the inner tube, a cylindrical sleeve is slidably fitted into the small-diameter portion, and the sleeve and inner tube are axially shifted from each other to form inner and outer surfaces. A communicating passage is provided, and the passages are made to coincide with each other by sliding the inner tube.

e Effect When a fire occurs, when the fire hose is pulled out and the fire hose is pulled after reaching the scene, the inner pipe connected to the fire hose slides. At this time, the sleeve remains in that position due to friction with the inner surface of the outer tube, and only the inner tube slides first. Then, when the inner tube slides a predetermined distance, the sleeve slides due to friction with the inner tube, aligning with the passage in the sleeve, the outer tube and the inner tube communicate, and water is introduced into the inner tube through the passage. . This brings the water pressure inside and outside the inner tube closer together, making it easier to pull out the inner tube. In this way, the sleeve also slides together with the inner tube, completely opening the flow path at the rear end of the inner tube.

f. Embodiments The present invention will be described in detail below with reference to illustrated embodiments.

1 and 2 are cross-sectional views showing one embodiment of the fire hydrant valve of the present invention, and FIG. 3 is a conceptual diagram showing a fire hydrant box.

In FIG. 3, reference numeral 1 denotes a fire hydrant box having a side-opening door 3 on the front side of the box body 2.
A basket-type hose storage 4 is provided inside the fire hydrant box 1, and in this hose storage 4, two fire hoses 6 are usually folded and stored in upper and lower baskets 5. There is. A fire hose 6 stored in the upper stage is equipped with a water spray nozzle 7 and supported by a holder 8. The two fire hoses 6 are connected to each other via one end, and the other end of the fire hose 6 stored in the lower basket 5 is connected to a fire hydrant valve 9.

The fire hydrant valve 9 is a release valve that opens by pulling the fire hose 6, and rotates in the direction of the fire hose 6.

This fire hydrant valve 9 will be explained with reference to FIGS. 1 and 2.

This fire hydrant valve 9 includes an L-shaped outer pipe 11 connected to a water supply port 10, and a cylindrical portion 12 of this outer pipe 11.
The valve is composed of an inner tube 13, a portion of which is slidably fitted into the inner tube, and opens and closes a flow path by sliding the inner tube 13. The outer pipe 11 is the water supply port 1
A claw portion (not shown) biased by a spring (not shown) is provided on the inner surface of the opening end on the 0 side, and is rotatably fitted into the water supply port 10 via the claw portion.

A small diameter portion 15 is provided at the rear end portion 14 of the inner tube 13, and a plurality of passages 16, which will be described later, are formed in the small diameter portion 15, communicating the inside and outside of the inner tube 13.

Reference numeral 17 denotes a cylindrical sleeve that is slidably fitted in the small diameter portion 15 of the inner tube 13 in the axial direction.
8 to maintain watertightness.

At the end of the small diameter portion 15 of the inner tube 13, a protrusion 13a for preventing slipping off is provided on the outer circumferential side, and is adapted to lock the rear end 17a of the sleeve 17.

Reference numeral 19 denotes a protrusion that prevents the inner tube 13 from coming off, and is adapted to engage with a locking portion (not shown) of the outer tube 11 at a predetermined position.

Passages 21 and 22 are formed in the sleeve 17 and the inner tube 13, respectively, to communicate between the inside and outside, and the positions of the passages 21 and 22 are shifted from each other in the axial direction. A circumferential groove (not shown) is formed on the outer surface of the inner tube 13 to correspond to the passage 22 . 2
3 is a rubber gasket provided on the inner surface of the sleeve 17.

Next, the operation of the fire hydrant valve will be explained.

In the event of a fire, open the fire hydrant door, press the alarm switch, and press the pump start switch.

Then, the user goes to the fire scene with the water spray nozzle 7 and pulls the fire hose 6.

At this time, the sleeve 17 is held in place due to friction with the rubber packing 18 on the inner surface of the outer tube 11, and only the inner tube 13 is pulled out.

This allows the passage 21 of the sleeve and the inner tube 13 to
The passages 22 of the inner tube 13 meet, the passage 22 of the inner tube 13 is opened, and water is introduced into the inner tube 13 through the passages 21 and 22. In this way, the water pressure inside and outside the inner tube 13 does not change, so the inner tube 13 can easily slide.
The sleeve 17 is connected to the protrusion 13 of the inner tube 13.
a and slides together with the inner tube 13 to completely open the flow path.

g. Effects of the invention As described above, the fire hydrant valve of the invention has an L-shaped outer pipe that is connected to the water supply port through one open end and forms a flow path orthogonal to the other, and a distal end. The base of the hose is connected to the inner tube, and the inner tube is inserted coaxially from the other open end of the outer tube to cut off the flow path and insert the rear end side, and the inner tube is pulled out to open the flow path. In the fire hydrant valve, a small diameter part is formed at the rear end of the inner pipe, a cylindrical sleeve is slidably fitted into the small diameter part, and the sleeve and the inner pipe are each fitted with a small diameter part in the axial direction. A passage communicating between the inside and outside was provided by shifting the position of the inner tube, and the passages were made to match each other by sliding the inner tube, so that when the inner tube was pulled slightly, the passage in the sleeve and the passage in the inner tube were aligned. As a result, water is introduced into the inner pipe and the water pressure inside and outside the inner pipe can be brought close to each other, so that even a single operator or a weak person can easily carry out fire extinguishing operations. Since the rear end of the inner tube only experiences friction with the sleeve, the coefficient of friction is smaller than in conventional systems in which the inner tube and outer tube slide directly. It can be done by force.

[Brief explanation of the drawing]

Figures 1 and 2 are cross-sectional views showing an embodiment of the fire hydrant valve of the present invention, Figure 3 is a conceptual diagram showing a fire hydrant box, and Figure 4 is a cross-sectional view showing a conventional fire hydrant valve. . 9...Bubble for fire hydrant, 11...Outer pipe, 12...
...Cylinder part, 13...Inner pipe, 15...Small diameter part, 17...
...Sleeve, 21, 22...Passway.

Claims (1)

[Scope of utility model registration request] An L-shaped outer tube is connected to the water supply port through one open end and has a flow path orthogonal to the other, and the base of the hose is connected to the tip, and the outer tube is coaxially connected to the other open end of the outer tube. In the fire hydrant valve, the fire hydrant valve is provided with an inner pipe whose rear end is inserted to block the flow path, and the inner pipe is pulled out to open the flow path, and the rear end of the inner pipe has a small diameter A cylindrical sleeve is slidably fitted into this small-diameter portion, and passages are provided in the sleeve and the inner tube that are shifted in position in the axial direction to communicate between the inside and the outside. A fire hydrant valve characterized in that the passages are aligned with each other.