JPS62470Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention consists of a plug connected to the gas main valve side,
and a socket connected to the gas appliance side, and the plug is provided with a safety valve device that immediately prevents gas from flowing out when the socket is separated from the plug, and
This invention relates to a gas pipe joint in which a safety valve opening mechanism is provided in a socket.

Household propane gas and city gas are supplied at relatively low pressure, so if the flow resistance in the gas piping or gas flow path of gas appliances is excessive, the gas flow rate will decrease and there is a risk of incomplete combustion or extinction. be.
Therefore, gas appliances and the like must be designed so that the flow resistance is as small as possible.

Such considerations are of course necessary for the above-mentioned pipe joints; one wire is bent into an elongated U-shape, and each end of the wire is fixed to the inner wall of the inner cylinder of the socket, while the free bent end is A safety valve in which the valve body of the safety valve is pushed to the open position has also been proposed. It is true that the flow resistance can be made sufficiently small with this valve opening operation mechanism, but since this valve pushing wire is only supported at its end, the bending free end is When inserting the plug into the socket, the wire may deviate from the center axis of the socket inner cylinder or be bent, making it impossible to apply the necessary and sufficient pressing force to the valve body surface, resulting in poor operation. It is inferior in reliability.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a gas pipe joint that has low flow resistance, no displacement or bending of the valve pushing member, and has excellent operational reliability and durability. Hereinafter, a detailed explanation will be given based on the illustrated embodiment.

In FIG. 1, the socket includes a socket inner cylinder 3 having a gas hose insertion part 2 at one end, and a socket outer cylinder 4 that is fitted and fixed to the outside of the socket inner cylinder 3.
and a sliding tube 5 fitted inside the socket inner tube 3.
and an operating cylinder 6 fitted between an inner socket cylinder 3 and an outer socket cylinder 4.

A thin plate-shaped portion 7 is integrally formed on the inner wall of the socket inner cylinder 3 to protrude along its axial direction, and a short valve pusher rod 8 is protruded from the center of the tip of this thin plate-shaped portion 7. . A guide groove 9 is formed in the smooth inner wall of the sliding tube 5 in the axial direction thereof, and a side edge of the thin plate-shaped portion 7 is slidably fitted into the guide groove 9. As shown in FIG. 5, this guide groove 9
are 2 projecting parallel to each other on the inner wall surface of the sliding tube 5.
It is formed between the protrusions 34 and 35 of the strip. still,
The guide groove 9 may be recessed in the inner wall surface of the sliding tube 5, as shown in FIG.

An annular packing 11 is fitted into the front large diameter portion 10 of the sliding tube 5, and the rear small diameter portion 12 of the sliding tube 5 is fitted with an annular packing 11.
The ring plate 14, which is loosely fitted into the socket, is pressed against the inner circumferential stepped surface 13 of the socket inner cylinder by a spring 15 interposed between the ring plate 14 and the large diameter portion 10 at the front end. This inner step surface 13
An O-ring 17 is fitted into the stepped portion 16 which is continuous with the O-ring 17, and is prevented from being removed by the ring plate 14. A flange portion 18 that engages with and disengages from the O-ring 17 is provided on the outer periphery of the rear end of the sliding tube 5 in a protruding manner.

In FIG. 2, the plug 19 has one end as a gas hose insertion part 20, the other end as a socket insertion part 21, and a valve chamber 22 in the middle. has been formed. A safety valve device consisting of a rubber valve seat 24, a valve body 25, and a valve spring 26 is built into the valve chamber 22.

When this plug 19 is inserted into the socket 1 and connected, the tip spherical surface portion 27 of the socket insertion portion 21
In order to push the annular packing 11 of the sliding tube 5, the sliding tube 5 slides backward against the bias of the spring 15. Thus, when the circumferential groove 23 of the plug reaches a position facing the through hole 28 formed in the circumferential wall of the socket inner cylinder 3, the small ball 29, which has a diameter larger than the wall thickness of the inner cylinder 3, is attached to the spring 30. As a result, the small ball 29 is pushed by the inner inclined step surface 31 of the operation barrel 6 which is urged forward.
A part of the groove 23 engages with the circumferential groove 23. After this engagement, as shown in FIG. 3, movement is prevented by the inner circumferential surface 32 of the advanced operation barrel 6, so that the connection state between the plug 19 and the socket 1 by the small ball 29 is accurate. will be maintained. Plug 19 and socket 1
When the valve body 25 is connected, the valve pushing rod 8 presses the center of the trifurcated cross-section guide portion 33 of the valve body 25.
5 is held in the open position.

In FIG. 3, when the operation tube 6 is moved backward against the spring 30, the restriction by the inner circumferential surface 32 is released, so that the small ball 29 is biased by the spring 15 acting through the sliding tube 5. Therefore, the plug escapes from the circumferential groove 23 of the plug, a portion protrudes from the outer surface of the inner circumference 3 of the socket, and engages again with the inclined inner circumferential stepped surface 31 of the operating barrel 6, as shown in FIG. The operating barrel 6 is held in the retracted position. The sliding tube 5 then slides forward under the bias of the spring 15 until the rear end flange 18 engages with the O-ring 17, pushing the socket fitting portion 21 of the plug out of the socket 1. When the plug 19 and the socket 1 are separated, the valve pusher rod 8 is removed from the valve body 25, so that the valve body 25 is immediately returned to the closed position by the bias of the spring 26.

As described above, in the gas pipe joint of the present invention, the thin plate-shaped portion 7 is integrally formed to protrude from the inner wall of the socket inner cylinder 3 along its axial direction, and the valve pusher rod 8 is provided at the center of the tip of the thin plate-shaped portion 7. Therefore, the pressure loss and flow resistance in the safety valve opening operation mechanism will not be excessive. A guide groove 9 is formed in the inner wall of the sliding tube 5 in the axial direction, and the thin plate part 7 is fitted into the guide groove 9, so that the thin plate part 7 is resistant to bending and buckling. This makes it possible for the valve pusher rod 8 to accurately push the center of the valve element without swinging relative to its axis, and to transmit the necessary and sufficient pressing force to open the valve. Further, by reinforcing the guide groove 9 by reinforcing it, the thickness and width of the thin plate portion 7 can be further reduced, which greatly contributes to reducing flow resistance.

That is, according to the present invention, a gas pipe joint with sufficiently low flow resistance and excellent operational reliability can be easily obtained, and this has great practical value.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a longitudinal sectional view of the socket, FIG. 2 is a longitudinal sectional view of the plug, FIG. 3 is a longitudinal sectional view of the socket and plug connected, and FIG. 4 is a longitudinal sectional view of the socket. 5 is a front view of the socket inner cylinder, FIG. 5 is a front view of the sliding cylinder, FIG. 6 is a front view of the valve body, and FIG. 7 is a front view of the sliding cylinder according to another embodiment. DESCRIPTION OF SYMBOLS 1...Socket, 3...Socket inner cylinder, 4...Socket outer cylinder, 5...Sliding cylinder, 6...Operation cylinder, 7...Thin plate-like part, 8...Valve pushing part, 9...Guide groove, 19...Plug,
25... Valve body, 29... Small ball for connection.

Claims (1)

[Scope of utility model registration request] When the plug is inserted into the socket inner cylinder, the valve pushing rod installed inside the socket inner cylinder pushes the valve body of the safety valve built into the plug to the open position, and the sliding cylinder inside the socket inner cylinder is pushed by the plug. When pressed, the connecting small ball engages the socket inner cylinder and the plug to connect them together, while when the operating cylinder for disconnecting is pushed,
The gas pipe joint is configured such that the sliding tube returns to its original position and the small ball engages with both the socket inner tube and the operation tube, thereby separating the plug and the socket inner tube. A thin plate-shaped part is integrally formed to protrude from the inner wall along the axial direction, a valve pushing rod is formed at the center of the tip of the thin plate-shaped part, and a guide groove is formed in the inner wall surface of the sliding cylinder. A gas pipe joint, characterized in that the thin plate-like portion is fitted into the pipe fitting.