JPH08266679A - Connecting base of fire-fighting equipment - Google Patents

Abstract

PURPOSE: To enable even fire hoses of different bores to be neatly and securely connected to the spout or water supply opening, etc., of fire-fighting equipment, such as a fire hydrant valve. CONSTITUTION: This connecting base comprises: a cylindrical internally threaded part 2, connected at one end to the spout or water supply opening, etc., of fire-fighting equipment, such as a fire hydrant valve, and having a connecting external thread 2d formed on the outer peripheral surface of the other end; and a cylindrical externally threaded part 3 hermetically fitted over the outer peripheral surface of the internally threaded part 2 in such a way as to freely slide in the direction of its axis, covering the external thread 2d of the internally threaded part 2 in such a way that it is freely removable, having a connecting external thread 3b formed on its outer peripheral surface, and being larger in diameter than the internally threaded part 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire hydrant valve for a fire hydrant device, a ground fire hydrant, an underground fire hydrant, a stand-type water supply port and a water intake port, a wall-embedded water supply port and a water intake port, a fire engine pump, and a connection. The present invention relates to a screw-type connection mouthpiece that is used by connecting to a discharge port or a water supply port of a firefighting device such as a joint, and relates to a connection mouthpiece of a firefighting device that can connect fire hoses with different diameters, respectively.

[0002]

2. Description of the Related Art Conventionally, as a screw type connection mouthpiece connected to a discharge port of fire fighting equipment such as a fire hydrant valve, the one shown in FIG. 5 is known. That is, the connection mouth ring 20 is formed in a tubular shape, and one end thereof is connected and fixed to the discharge port of the fire hydrant valve 21 by screwing. Further, on the outer peripheral surface of the other end portion of the connection mouthpiece 20, a male screw 20a to which a screw type female metal fitting (not shown) provided at an end portion of a fire hose (not shown) is connected is formed. Then, the fire hydrant valve 21 and the fire hose are connected by screwing the female fitting of the fire hose into the male screw 20a of the connection mouthpiece 20.

[0003]

By the way, conventionally, the fire brigade used a fire hose with a diameter of 65 A and connected this to a fire hydrant valve (water discharge port) to extinguish the fire. It is now possible to use fire hoses and fire hydrant valves with sizes other than 65A at the discretion of the district fire chief, and firefighter hoses and fire hydrant valves with smaller diameters such as 50A are used for reasons such as weight reduction. Have begun.

However, at present, since the fire hose used for each fire brigade has different diameters, it can be connected to a fire hydrant valve (water outlet) within the area of jurisdiction, but it will be supported in other areas due to a big fire or the like. If you go to, there is a problem that you can not connect to the fire hydrant valve (water outlet).

In order to solve this problem, intermediary metal fittings having different diameters at both ends are connected in advance in the vicinity of the fire hydrant valve by a chain, or the fire brigade brings the intermediary metal fittings to form the fire hydrant valve. The fire hose was connected via an intermediary metal fitting.

However, when the medium metal fitting is used, the medium metal fitting and the fire hydrant valve must be connected to each other, and the medium metal fitting and the fire hose must be connected to each other, so that there is a problem that it takes time to connect the fire hydrant valve and the fire hose. . Also, forget the intermediary metal fittings,
The intermediary metal fittings I brought in may not fit the fire hydrant valve,
There was also a problem that the fire hose could not be connected to the fire hydrant valve.

The present invention was created in order to solve the above-mentioned problems, and its purpose is to ensure that even a fire hose with a different diameter can be connected to the discharge port or water supply port of a fire-fighting device such as a fire hydrant valve. To provide a connection base for fire fighting equipment that can be connected to.

[0008]

To achieve the above object, the connection mouthpiece of a fire-fighting device of the present invention has one end connected to a discharge port or a water supply port of a fire-fighting device such as a fire hydrant valve. , A cylindrical inner threaded metal fitting having a male thread for connection formed on the outer peripheral surface of the other end, and an outer peripheral surface of the inner threaded metal fitting which is fitted in an airtight manner and is slidable in the axial direction. It is configured by an outer threaded metal fitting having a diameter larger than that of the inner threaded metal fitting which covers the screw openly and has a male thread for connection formed on the outer peripheral surface.

[0009]

[Operation] When connecting a fire hose with a small diameter to the connection mouthpiece, the outer screw fitting is moved along the inner screw fitting to open the male screw portion of the inner screw fitting. Next, the screw type female metal fitting provided at the end of the fire hose is screwed to the male screw of the inner screw hardware. As a result, the fire hose with a small diameter is in a state of being connected to the inner screw fitting of the connection mouthpiece.

On the other hand, when connecting a fire hose having a large diameter to the connection mouthpiece, the outer screw fitting is moved in the opposite direction along the inner screw fitting to cover the male screw portion of the inner screw fitting. Next, the female screw-type metal fitting provided at the end of the fire hose is screwed onto the male screw of the outer screw fitting. As a result, the fire hose with a large diameter is in a state of being connected to the outer screw fitting of the connection mouthpiece.

As described above, since the connection mouthpiece is composed of the inner threaded metal fittings and the outer threaded metal fittings having different diameters, even a fire hose having different diameters can be satisfactorily and reliably connected. .

[0012]

Embodiments of the present invention will now be described in detail with reference to the drawings. 1 to 4 show a connection mouthpiece 1 according to an embodiment of the present invention. The connection mouthpiece 1 includes a cylindrical inner screw fitting 2 and a cylindrical outer screw fitting 3 having a diameter larger than that of the inner screw fitting 2. In the present embodiment, one end of the inner screw fitting 2 is connected and fixed to the discharge port 6a of the fire hydrant valve 4.

The inner screw fitting 2 is made of a metal material and has an outer peripheral surface formed in a stepped cylindrical shape, and one end thereof is connected and fixed to a discharge port or a water supply port of a fire fighting device such as a fire hydrant valve 4. At the same time, a fire hose (not shown) with a small diameter can be connected to the other end. That is, the inner screw fitting 2 has a connection portion 2b formed on the outer peripheral surface thereof with a male screw 2a screwed to a discharge port or a water supply port of a fire fighting device such as a fire hydrant valve 4.
And a supporting portion 2c that is a little thicker than the connecting portion 2b, which is connected to the connecting portion 2b and on which an outer screw fitting 3 described later is slidably fitted, and an outer peripheral surface that is connected to the supporting portion 2c. It is composed of an inner connecting portion 2e which is slightly thicker than a supporting portion 2c formed with a male screw 2d for connection to which a screw type female metal fitting (not shown) provided at the end of the fire hose is screwed. The outer diameter of the inner connecting portion 2e is set so that a fire hose with a diameter of 50A can be connected.

The outer screw fitting 3 is formed of a metal material in a cylindrical shape. One end of the outer screw fitting 3 is airtightly fitted to the outer peripheral surface of the inner screw fitting 2 so as to be slidable in the axial direction. The two male screws 2d are openably covered, and a fire hose (not shown) having a large diameter can be connected to the other end. That is, the outer screw metal fitting 3 is a sliding portion 3a which is airtightly fitted to the outer peripheral surface of the support portion 2c of the inner screw metal fitting 2 via the O-ring 5 and is slidable in the axial direction.
And the male screw 2d of the inner connecting portion 2e of the inner screw fitting 2 which is continuously provided on the sliding portion 3a and is openable, and the outer peripheral surface of which is screwed with a screw-type female fitting provided at the end of the fire hose. It comprises an outer connecting portion 3c formed with a male screw 3b for connection, and a flange portion 3d which is connected to the sliding portion 3a and can come into contact with a threaded female metal fitting of a fire hose. A grip portion 3e is connected to the flange portion 3d so that the outer screw fitting 3 can be easily rotated. The outer diameter of the outer connecting portion 3c is set so that a fire hose having a diameter of 65A can be connected. The overall length of the outer screw fitting 3 is selected to be the same as the length of the support portion 2c of the inner screw fitting 2, and the outer screw fitting 3 faces the outer peripheral surface of the support portion 2c as shown in FIG. Then, the inner connecting portion 2e of the inner screw fitting 2 is opened, and the outer screw fitting 3 is moved to the inner connecting portion 2e side as shown in FIG. 2 to move the sliding portion 3a to the step portion of the inner connecting portion 2e. When contacted, the outer connecting portion 3c
Covers the inner connecting portion 2e.

As shown in FIG. 4, the connection mouthpiece 1 is attached to the fire hydrant valve 4 by screwing the connection portion 2b of the inner screw fitting 2 into the discharge port 6a of the fire hydrant valve 4. There is. In FIG. 4, 6 is a valve box, 6a is an inlet, 6b is a discharge port, 7 is a lid, 8 is a valve rod, 9 is a valve, 1
0 is a seat, 11 is a handle, and 12 is an O-ring.

When connecting a fire hose having a diameter of 50 A to the connection mouthpiece 1, as shown in FIG. 1, the outer screw metal fitting 3 is slidably moved in the direction of the connecting portion 2b to the inside of the inner screw metal fitting 2. The connection part 2e is opened. And 50A
The screw type female metal fitting provided at the end of the fire hose is screwed to the male screw 2d of the inner connecting portion 2e. By this, 5
The 0A fire hose is in a state of being connected to the inner screw fitting 2 of the connection mouthpiece 1. At this time, the female fitting of the fire hose comes into contact with the end surface of the outer screw fitting 3 to regulate the tightening amount.

When connecting a fire hose having a diameter of 65 A to the connection mouthpiece 1, the outer screw fitting 3 is slidably moved toward the inner connecting portion 2e of the inner screw fitting 2 as shown in FIG. Then, the inner connecting portion 2e is covered. Then, a screw-type female metal fitting provided at the end of the fire hose of 65A is screwed onto the male screw 3b of the outer connecting portion 3c of the outer screw fitting 3. As a result, the fire hose of 65 A is in a state of being connected to the outer screw fitting 3 of the connection mouth ring 1. At this time, the female fitting of the fire hose comes into contact with the flange portion 3d to regulate the tightening amount.

In this way, the outer screw fitting 3 is moved along the inner screw fitting 2 to open or cover the inner connecting portion 2e of the inner screw fitting 2, so that the connecting cap 1 has a different diameter. Fire hoses can be connected to each.

In the above embodiment, the inner connecting portion 2e is formed to have a diameter capable of connecting a fire hose of 50A, and the outer connecting portion 3c is formed to have a diameter capable of connecting a fire hose of 65A. In the embodiment of FIG.
The outer diameter of the outer connecting portion 3c may be 50A or 65A.

In the above embodiment, the connection mouthpiece 1 is connected to the discharge opening 6b of the fire hydrant valve 4, but in other embodiments, the connection mouthpiece 1 is connected to the ground type fire hydrant or underground type. It may be connected to a fire hydrant, a stand-type water supply port or a water intake port, a wall-embedded water supply port or a water intake port, a pump of a fire engine, a discharge port or a water supply port of fire fighting equipment such as a connection joint.

[0021]

As described above, the connection mouthpiece of the fire-fighting equipment of the present invention has a cylindrical inner threaded metal fitting formed with a male thread for connection on a part of its outer peripheral surface, and an airtight inner threaded fitting. Since it is configured to be slidably fitted in the axial direction and has an outer threaded fitting with a larger diameter than the inner threaded fitting with a male thread for connection formed on a part of the outer peripheral surface, the inner threaded fitting or the outer threaded fitting By using any of the metal fittings, it is possible to connect fire hoses having different diameters. That is, by using the connection mouthpiece of the present invention, it is possible to connect fire fighting hoses having different diameters to fire fighting equipment such as a fire hydrant valve, and solve the problems described at the beginning. Further, by connecting the connection mouthpiece of the present invention to the discharge port or the water supply port of an existing fire fighting device such as a fire hydrant valve, it is possible to switch to a fire hose with a small diameter without abolishing expensive fire fighting devices. can go.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of a connection mouthpiece of a fire fighting device according to an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view of a connection mouthpiece in a state where an outer screw fitting is moved.

FIG. 3 is a side view of a connection mouthpiece.

FIG. 4 is a partially cutaway front view showing a state in which a connection mouthpiece is connected to a discharge port of a fire hydrant valve.

FIG. 5 is a front view of a state in which a conventional screw-type connection mouthpiece is connected to a discharge port of a fire hydrant valve.

[Explanation of symbols]

Reference numeral 1 is a connection mouthpiece, 2 is an inner screw metal fitting, 2d is an inner screw metal fitting external thread, 3 is an outer screw metal fitting, and 3b is an outer screw metal fitting external screw.

Claims (1)

[Claims] 1. A tubular shape, one end of which is connected to a discharge port or a water supply port of a fire fighting device such as a fire hydrant valve (4) and the other end of which is formed with a male screw (2d) for connection. Of the inner screw metal fitting (2) and the outer peripheral surface of the inner screw metal fitting (2) are airtight and slidably fitted in the axial direction so as to be slidable in the axial direction.
And a cylindrical outer threaded metal fitting (3) having a diameter larger than that of the inner threaded metal fitting (2) having an outer peripheral surface formed with a male thread (3b) for connection. A connection base for fire fighting equipment that is characterized by