JPS6365347B2 - - 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 or the like, and more particularly 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. When only one firefighter was present, the water pressure at the hydrant was so high that it was virtually impossible to open the hydrant valve while holding the water nozzle.

Therefore, we first filed an application for a fire hydrant valve (Utility Application No. 59-28400), as shown in Figure 7, 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.

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 2 acts on the side of the inner pipe 3, and the water pressure normally increases. When the water pressure is 4 kg/cm ² , a pulling force of 12 kg is required, and when the water pressure is 7 kg/cm ² , a pulling force of 20 kg is required, so when the valve is opened, the inner pipe 3 must be pulled with considerable force. For this reason, when a person who is inexperienced with the operation or a person with limited strength, such as a woman, attempts to pull the fire hose 6, the inner pipe 3 does not slide and water starts to be sprayed. In some cases, the fire hose 6 may not be activated, and operations such as pulling the fire hose 6 may be required again.

SUMMARY OF THE INVENTION An object of the present invention is 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 provides an L-shaped outer tube that is connected to a water supply port through one open end and has a flow path in an orthogonal direction, and the base of a hose is connected to the tip. an inner tube whose rear end is inserted coaxially from the other open end of the outer tube to block the flow path; and a valve body supported by the outer tube and fitted into the inner tube. A passageway is provided that communicates the space on the proximal end side of the outer tube and the space on the rear end side of the inner tube, which is blocked by the inner tube, and a solenoid valve is provided to open and close the passageway. The reason is that a control means is provided for arbitrarily setting the operation of the .

e Effect: In the event of a fire, pull out the fire hose and set the operating time of the solenoid valve before heading to the scene. Then, when the solenoid valve reaches the site, the solenoid valve is activated to open the passage, thereby communicating the space on the proximal end side of the outer tube and the space on the rear end side of the inner tube. As a result, the space on the rear end side of the inner tube is filled with water through the passage, and the water pressure in the space increases, causing the inner tube to slide and opening the valve.

f Examples The present invention will be described in detail below with reference to examples shown in the drawings.

1 to 3 are sectional views showing one embodiment of the fire hydrant valve of the present invention, and FIG. 4 is a conceptual diagram showing a fire hydrant box.

In FIG. 4, reference numeral 10 is a fire hydrant box having a side-opening door 12 on the front side of a box body 11. A basket-type hose storage 13 is provided inside the fire hydrant box 10, and the hose storage 13 includes upper and lower baskets 14 ₁ ,
14 ₂ , usually two fire hoses 15 are folded and stored. A fire hose 15 stored in the upper stage is equipped with a water spray nozzle 16 and supported by a holder 17. 2 fire hoses 1
5 are connected to each other through one end, and the fire hose 15 stored in the lower basket ₁₄₂
The other end is connected to a fire hydrant valve 18.

The fire hydrant valve 18 is a release valve that opens by pulling the fire hose 15, and rotates in the direction of the fire hose 15.

This fire hydrant valve 18 will be explained with reference to FIGS. 1 to 3.

This fire hydrant valve 18 includes an L-shaped outer pipe 20 connected to a water supply port 19, and a cylindrical portion 2 of this outer pipe 20.
1 and an inner tube 22 that is partially slidably fitted into the valve.By sliding the inner tube 22, the valve opens and closes a flow path. The outer tube 20 has a claw part 23 biased by a spring (not shown) on the inner surface of the opening end on the side of the water supply port 19, and is rotatably fitted into the water supply port 19 via the claw part 23. There is.

A valve body 24 is disposed on the axis of the cylindrical portion 21 of the outer tube 20.
is supported, and when the inner tube 22 is fitted into or separated from the valve body 24, the valve is opened and closed. The valve body 24 includes a valve body 25 and an O-ring 2.
6, which is attached to a bolt 27 passing through an insertion hole in the center thereof, and is supported by the closed end wall surface 21a of the cylindrical portion 21.

The wall surface of the rear end of the inner tube 22 has a space A on the proximal end side of the outer tube 20 and a space B on the rear end side of the inner tube 22, with the inner tube 22 blocking the flow path of the outer tube 20. A communicating passage 28 is provided.

A solenoid valve 29 opens and closes the passage 28, and is composed of a valve body 30, an electromagnet 31 that operates the valve body 30, and a return spring 32.

The valve body 30 has a plunger 33 arranged concentrically with the bolt 27, and a radial support plate 3.
4, and a resin ring 35 is attached to this support plate 34.
It is equipped with. On the other hand, the plunger 3
The electromagnet 31 that operates the wall 21 of the cylindrical portion 21
The return spring 32 is disposed on the outside of the plunger 33 and is interposed between a protrusion 33a provided in the middle of the plunger 33 and the wall surface 21a.
21b is a cylindrical portion provided on the wall surface 21a concentrically with the plunger 33;
The above-mentioned return spring 32 is disposed inside, and the above-mentioned protrusion 33 is disposed at the open end of the cylindrical portion 21b.
A locking portion 21c is provided for locking a. The inner circumferential surface of the inner tube 22 is formed with a serrated edge-shaped uneven portion 36 for increasing flow resistance, and the outer circumferential surface is provided with a retainer formed on the inner circumferential surface of the outer tube 20. A step portion 22a is formed which locks onto the step portion 20a for use. 37 is an O-ring provided on the inner peripheral surface of the outer tube 20.

Returning to FIG. 1, 38 is an alarm switch, 39 is a pump start switch, 40 is an adjustment button for setting the operating time of the solenoid valve 29, and 41 is a start button. This adjustment button 40 operates a control means, such as a timer relay, which can set the time until the hose is fully extended, usually from 0 to 30 seconds.

Next, the operation of the fire hydrant valve of the present invention having the above configuration will be explained.

In the event of a fire, open the fire hydrant door 12,
Press alarm switch 38 and pump start switch 39. Next, the time until the electromagnetic valve 29 is activated is set using the adjustment button, and the user holds the water discharge nozzle 16 and presses the start button 41. Then, after a certain period of time has elapsed after heading towards the fire scene, the solenoid valve 29 is activated and the valve body 30 is caused to slide. Therefore, the passage 28 is opened and water flows into the space B. When the space B is filled with water and the internal pressure increases, the water pressure causes the inner tube 22 to slide and separate from the valve body 24. In this way, the outer tube 2
The base end side of the tube 0 communicates with the inside of the inner tube 22, and water discharge starts. At this time, the flow path resistance increases due to the uneven portion 36 within the inner tube 22, so that the sliding movement of the inner tube 22 is facilitated.

When the fire extinguishing work is completed, the operation of the pump and the solenoid valve 31 are stopped, the water supply is stopped, and the inner pipe 2
2 into the outer pipe 20, the fire hydrant valve is returned to its original state.

g Other Embodiments FIGS. 5 and 6 show other embodiments of the present invention, in which the same parts as in FIG. 1 are given the same reference numerals and their explanations are omitted.

In this case, the proximal space A of the outer tube 20 and the inner tube 2
A hole 42 that is perpendicular to the middle of the passage 28 that communicates with the rear end side space B of 2 is bored in the axial direction of the wall surface of the inner tube 22, and the valve body 44 of the valve body 43 of the solenoid valve 43 is inserted into this hole 42. It is designed to slide. This valve body 44 is provided on a ring 47 provided on the plunger 45 via a support plate 46 .
48 is a return spring.

In this embodiment as well, by setting the operating time of the solenoid valve 43 using the adjustment button 40 and pressing the start button 41, the solenoid valve 43 is activated and the valve body 44 is activated when the fire scene is reached. It slides to open the passage 28. Then, water flows into the space B through the passage 28, and when the space B is filled with water, the inner pipe 22 is slid, and the inner pipe 22 is separated from the valve body 24. In this way, the valve opens and water supply begins.

h Effects of the Invention As described above, according to the fire hydrant valve according to the present invention, the L-shaped outer pipe is connected to the water supply port through one open end and has a flow path in an orthogonal direction; The base of the hose is connected to the inner tube, and the rear end of the hose is inserted coaxially from the other open end of the outer tube, blocking the flow path. an electromagnetic valve that includes a fitted valve body, provides a passage that communicates a space on the proximal end side of the outer tube that is blocked by the inner tube and a space on the rear end side of the inner tube, and opens and closes the passage; Since a control means is provided to arbitrarily set the operation of this solenoid valve, the fire hydrant valve can be opened after a certain period of time has passed after pressing the push button switch, making it easy to extinguish a fire even by a single operator. Can carry out activities. Further, since the time until the start of water spraying can be set using the adjustment button, the time until the start of water spraying can be easily set based on the distance to the site, etc.

Note that there are the following prior art related to the present invention.

Utility Application No. 59-32009 "Valve for Fire Hydrant" 〃 No. 59-33741 "〃" Patent Application No. 59-219964 "Valve Operating Method and Valve Structure for Fire Hydrant Valve"

[Brief explanation of drawings]

1 to 3 are sectional views showing one embodiment of the fire hydrant valve of the present invention, FIG. 4 is a conceptual diagram showing a fire hydrant box, and FIGS. 5 and 6 are sectional views showing another embodiment of the fire hydrant valve. A sectional view showing an example, FIG. 7 is a sectional view showing a conventional fire hydrant valve. 20... Fire hydrant valve, 20... Outer pipe, 21... Cylinder part, 22... Inner pipe, 24... Valve body, 28... Passage, 2
9,43...Solenoid valve, 30,44...Valve body, 36...
Uneven part, 40...adjustment button, 42...hole.

Claims (1)

[Scope of Claims] 1. An L-shaped outer tube that is connected to a water supply port through one open end and has a flow path formed in an orthogonal direction;
An inner tube is connected to the base of the hose at its tip, and the rear end is inserted coaxially from the other open end of the outer tube to block the flow path, and the inner tube is supported by the outer tube and is connected to the inner tube. a valve body fitted into the inner tube, and a passageway communicating between the space on the proximal end side of the outer tube and the space on the rear end side of the inner tube, which are blocked by the inner tube, and an electromagnetic valve for opening and closing the passageway. A valve for a fire hydrant, comprising a valve and a control means for arbitrarily setting the operation of the solenoid valve. 2. The fire hydrant valve according to claim 1, wherein an uneven portion is formed on the inner circumferential surface of the inner pipe.