JP2001238975A - Automatic water pressure regulator for fire protection hose - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automatic pressure regulator for fire protection hoses which does not give rise to hindrance in water feeding force and eliminates the possibility of rupturing the fire protection hoses even if the fire protection hoses are compressed from the outside during the supply of water to the fire protection hoses in fire extinguishing activity. SOLUTION: This automatic pressure regulator for the fire protection hoses is constituted by communicating and opening the front and rear of a blind water escape pipe 5 to the lateral side of the water feed pipe 2 screwed at the front and rear between the joints of the first fire protection hose 1 and the second fire protection hose 3 and has a means for releasing the backflow water to the outside by closing the rear side aperture of the water feed pipe 2 and bypassing and admitting the backflow water toward the blind water escape pipe 5 at the external pressure of the fire protection hoses.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic water pressure adjusting device for a fire hose that discharges excess backflow water to the outside through a fire hose when water supply is stopped by external pressure.

[0002]

2. Description of the Related Art Conventionally, in a fire fighting activity using a fire hose, a block provided with a concave portion on the inside of a base provided with a rounded inclined surface is arranged side by side on the right and left, and the fire hose is provided in the concave portion. There has been proposed a car bridge in which a fire hose is not directly hindered (for example, see Japanese Patent Application Laid-Open No. 7-185032).

[0003]

In the fire brigade for fire hoses, when a fire hose is extended on a road surface, a conventional fire hose car bridge is fitted into a recess of the car bridge to facilitate water discharge. However, in places with heavy traffic, it is not always feasible for many wheels to pass over the car bridge during firefighting, especially trucks and cars passing near the fire location. Since the fire hose is directly compressed, the fire fighting work is hindered, and the fire hose itself may be ruptured, and the fire extinguishing equipment is adversely affected.

[0004] In addition, there is also a problem that it takes time to insert a fire hose and the fire area is expanded.

[0005] Therefore, the invention according to claims 1 to 4 of the present invention is characterized in that when water absorbed from a water suction pipe through a fire fighting device is supplied to a fire hose by a fire pump and the fire hose is compressed from outside. The purpose of the present invention is to provide an automatic water pressure adjusting device for a fire hose for allowing backflow water caused by water pressure to flow in the direction of a bottomed drain pipe by means of automatic water pressure adjusting means so as to smoothly drive without impairing water supply power. It was done.

Another object of the present invention is to provide an automatic water pressure regulator for a fire hose capable of discharging supply water and backflow water to the outside.

[0007]

In order to achieve the above object, according to the first aspect of the present invention, the front and rear portions are screwed between joints of the first fire hose and the second fire hose. The front and rear portions of the bottomed drain pipe are connected and opened to the side of the drained water pipe, the rear opening of the water pipe is closed at the time of the external pressure of the fire hose, and the backflow water flows in the direction of the bottomed drain pipe and is discharged to the outside. Means are provided.

In the invention according to claim 2 of the present invention, one end of a forked connecting portion which is screwed to a joint of a fire hose is integrally connected to a rear opening of a water pipe. And the other of the tip end port is connected to the bottom end of the bottomed drain pipe, and a means for allowing the backflow water to bypass the bottomed drain pipe in the direction of the bottomed drain pipe is a check valve provided with the water pipe rear opening part capable of being opened and closed, An external discharge means of the backflow water is provided with a check valve inside the bottomed drain pipe and a spout supporting the check valve, and a water discharge port formed on the outer periphery at the rear of the bottomed drain pipe, and the outside of the supply water and the backflow water is provided. The discharge means is opened by communicating the lateral front of the water pipe and the front of the bottomed drain pipe with a check valve pressure adjusting water pipe, slightly behind the check valve pressure adjusting water pipe and on the upper surface of the bottomed drain pipe. It is a water discharge pipe with a high-pressure meter cock that can be opened and closed. To.

According to a third aspect of the present invention, the check valve and the high-pressure meter cock each have a rotating shaft, and the support shaft of the check valve has a lower end portion of the rotating shaft penetrating a connection portion. A large-diameter gear is fixed to the upper end thereof, and a lower-diameter gear is fixed to the high-pressure meter cock, and a lower-diameter gear is fixed to the upper end thereof. And a large diameter gear is provided with one end of a spring.

The invention according to claim 4 of the present invention is characterized in that the inside of the lid of the check valve for opening and closing the rear opening of the water pipe is formed in a concave portion.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In each of the drawings, FIG. 1 is a partially cut-away plan sectional view of a main part showing a state in which a water pipe rear opening is opened, and FIG. 2 is a part of a main part showing a state in which a water pipe rear opening is closed. 3 is a plan view, FIG. 4 is a front view, and FIG. 5 is a rear view.

First, in FIGS. 1 to 5, the front opening is
The rear opening of the water supply pipe 2 screwed with the joint of the first fire hose 1 and the rear end opening of the front end of the forked connection 4 screwed with the joint of the second fire hose 3 And the other end is connected to the rear end of the bottomed drain pipe 5 so that the bottomed drain pipe 5 is provided alongside the water pipe 2,
The front and rear of the water pipe 2 and the bottomed drain pipe 5 are supported by support plates 6a and 6b. In front of the bottomed drain pipe 2, there is formed a check valve pressure adjusting water pipe 7 communicating with and opening to the water pipe 2. A water discharge pipe 8 having a high-pressure meter cock 9 built therein is formed so as to rise from the upper surface and straddle in the direction of the water supply pipe 2. The bottomed drain pipe 5 has a built-in check valve 11 supported by a spline 10 and a water outlet 12 provided at the rear of the outer periphery. The high-pressure meter cock 9 is provided with a rotating shaft 15 to which a small-diameter gear 13 is fixed at an upper portion. A rotary shaft 16 having a large-diameter gear 14 fixed to the upper end is provided near the distal end opening of the forked connecting portion 4 on the bottomed drain pipe 5 side,
The small-diameter gear 13 and the large-diameter gear 14 are suspended by a chain 17 so as to rotate forward and backward synchronously. A lower portion of the rotary shaft 16 having the large-diameter gear 14 fixed to the upper end thereof penetrates the bifurcated connection portion 4, and a lower end portion of a check valve 18 which can open and close the rear opening of the water pipe 2 is attached by a support shaft. Have been. A spring mounting portion 19 is formed at a position above the water pipe 2 of the front support plate 6a, and one of the springs 20 is mounted in a spring mounting hole 21 for adjusting the tension of the spring 20 in accordance with the water pressure, and the other has a large diameter. It is attached to the gear 14.

Next, the actual operation of such an embodiment will be described. During firefighting activities, when a fire hose is laid on a traffic route and a truck or other transportation system passes over the fire hose, the fire hose is compressed by pressurization and a backflow phenomenon occurs, and the supply water in the fire hose flows backward. FIG.
As shown in FIG. 2, the opened check valve 18 is pressed by the backflow water, and as shown in FIG.
At the same time, the rear opening of the water pipe 2 is closed by the lid force, and the large-diameter gear 14 and the small-diameter gear 13 rotate synchronously via the chain 17 to open the closed high-pressure meter cock 9. Specifically, the check valve 18 rotates 60 ° and the water pipe 2
When the rear opening is closed, the large-diameter gear 14 also rotates 60 ° via the rotating shaft 16 and the small-diameter gear 13 rotates 90 ° via the chain 17. Therefore, the high-pressure meter cock 9 also rotates 90 ° via the rotation shaft 15. Then, the backflow water is detoured in the direction of the bottomed drain pipe 5, and the check valve 1 in the bottomed drain pipe 5 is sent by the water pressure.
1 compresses and retracts the firing 10. The water discharge port 12 closed by the sliding contact of the check valve 11 is opened, and the backflow water is discharged to the outside by the water discharge port 12 and at the same time, passes through the gap of the check valve 11 to cut the front side in the bottomed drain pipe 5. After passing through, the water is discharged from the water discharge pipe 8 to the outside through the open high-pressure meter cock 9. Supply water supplied by a pump through a water suction pipe (not shown) flows into a bottomed drain pipe 5 through a check valve pressure adjusting water supply pipe 7, and then flows through a high pressure meter cock 9 which is opened. The water is discharged from the water discharge pipe 8 to the outside, and thus the balance between the supply water pressure and the backflow water pressure is maintained by the size of the check valve pressure adjusting water supply pipe 7, so that the fire hose is ruptured. Danger can be prevented and fire fighting can be performed smoothly.

At the same time as the external obstacle is resolved, the supply water flows in the water pipe 2 in the direction of the second fire hose 3, and the rotating shaft 16, the large-diameter gear 14 and the check valve 18 rotate at the same time. The stop valve 18 opens the rear opening of the water pipe 2 and the large-diameter gear 1
4 rotates the small-diameter gear 13 via the chain 17, closes the high-pressure meter cock 9, restores the spring 20 and the spring 10 by the force of the lid, and moves the check valve 11 to its original position.

Here, the material of the automatic water pressure adjusting device for the fire hose is not particularly limited, but it is rustproof, easy to carry,
For example, those made of stainless steel or synthetic resin having strength are preferable.

Although the present invention has been described in terms of mounting a single spring 20, the present invention is not limited to this, and may include mounting a plurality of springs. Also, the shape of the check valve 18 is not limited as long as it can open and close the rear opening of the water pipe 2.

[0017]

Since the present invention is configured as described above, the following effects can be obtained.

According to the first aspect of the present invention, since the threaded portion is formed in the front and rear openings of the water supply pipe, the fire hose can be easily threaded and the bottomed drain pipe is provided. Even if an external pressure is applied to the fire hose, there is an effect that there is no fear of failure of the pump or burst of the fire hose.

According to a second aspect of the present invention, the rear opening of the water pipe and the rear end of the bottomed drain pipe are connected by a two-way connection, and the front side of the water pipe and the front of the bottomed drain pipe have a check valve pressure. It has a check valve that opens and closes the communication pipe with the adjusting water pipe, and the opening on the rear side of the water pipe can be freely opened and closed. A water discharge pipe equipped with a mail cock is provided, and even if the fire hose is subjected to external pressure due to the chain drive of the large-diameter gear and the small-diameter gear, the supply water and the backflow water are sent. By closing the rear opening of the water pipe with a check valve, it flows around in the direction of the bottomed drain pipe and is discharged to the outside from the water discharge port and the water discharge pipe, preventing the impact of the fire hose and smoothly extinguishing the fire. There is an effect that it can be continued.

Further, since the inside of the lid of the check valve is depressed, normal water supply can be performed immediately when the external pressure is released.

[Brief description of the drawings]

FIG. 1 is a partially cutaway plan sectional view of a main part showing a state in which a rear opening of a water pipe is opened.

FIG. 2 is a partially cutaway cross-sectional plan view of a main part showing a state where a rear opening of a water pipe is closed.

FIG. 3 is a plan view.

FIG. 4 is a front view.

FIG. 5 is a rear view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 1st fire hose 2 water supply pipe 3 2nd fire hose 4 bifurcated connection part 5 drainage pipe with bottom 7 water supply pipe for check valve pressure regulation 8 water discharge pipe 9 high pressure meter cock 10 spring 11 check valve 12 water outlet 13 small diameter Gear 14 Large-diameter gear 15, 16 Rotating shaft 17 Chain 18 Check valve 20 Spring

Claims (4)

[Claims] 1. A front and rear portion of a bottomed drain pipe is opened between a joint of a first fire hose and a second fire hose at a side of a water pipe into which the front and rear portions are screwed. An automatic water pressure adjusting device for a fire hose, comprising an external discharge means for sometimes closing the rear opening of the water supply pipe and allowing the backflow water to bypassly flow in the direction of the bottomed drain pipe. 2. A rear end opening of the water supply pipe is integrally connected to one end of a forked connecting portion screwed to a joint of a fire hose, and the other end is connected to a bottomed bottom. A means connected to the rear end of the drain pipe, and a means for diverting the backflow water in the direction of the bottomed drain pipe is a check valve provided with a water pipe rear opening capable of being opened and closed. A drain valve formed on the rear outer periphery of the bottomed drain pipe is provided with a check valve and a spout supporting the check valve inside the drain pipe, and external discharge means for supply water and backflow water is provided on the front side of the water pipe. A water discharge pipe having a high pressure meter cock openable and closable at the front of the bottomed drain pipe with a check valve pressure adjusting water pipe slightly behind the check valve pressure adjusting water pipe and on the upper surface of the bottomed drain pipe. The fire hose according to claim 1, wherein Hydraulic pressure adjusting device. 3. The check valve and the high-pressure meter cock according to claim 2 each have a rotating shaft, and a lower end portion of the rotating shaft penetrating a bifurcated connecting portion is attached to a support shaft of the check valve. A large-diameter gear is fixed to the upper end, and a lower-diameter gear is fixed to the high-pressure meter cock, and a lower-diameter gear is fixed to the upper end, and a chain is attached to the large-diameter gear and the small-diameter gear. 3. The automatic water pressure adjusting device for a fire hose according to claim 2, wherein one end of a spring is attached to the large-diameter gear while being suspended. 4. The check valve according to claim 1, wherein the inside of the lid of the check valve for opening and closing the rear opening of the water pipe is formed in a recess.
4. The automatic water pressure adjusting device for a fire hose according to 2 or 3.