JPS6237037Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is useful for cases where, for example, an LP gas cylinder falls down due to an earthquake, or when a fire occurs, an external force exceeding a certain level is applied to the pipe joint while it is still connected. When the sleeve is removed, the socket and plug are automatically separated without the need to manually pull out the sleeve.
This invention relates to a pipe joint that simultaneously closes a valve body.

Traditionally, LP gas cylinders used at home are
The indoor equipment and the LP gas cylinder installed outdoors are connected with a rubber hose or copper pipe.
If a hose falls off or breaks during an earthquake, or if a copper pipe cracks, there is a danger of gas leaking. Furthermore, in the event of a fire, it would be difficult to remove the cylinder from the rubber hose or copper pipe, increasing the risk of a gas explosion.

In view of these circumstances, the present invention is designed to separate the socket and plug of the pipe fitting when a certain amount of external force is applied to the pipe joint in the pulling direction, regardless of the operation of the sleeve, and close the valve body at the same time, thereby discharging the gas in the cylinder. The purpose of this invention is to prevent the danger of gas leakage into the atmosphere and to allow gas cylinders to be quickly moved from the fire scene to other locations.Examples of the present invention will be described below.

A rear cylindrical body 3 with a slightly larger diameter is located at the rear of the front cylindrical body 2.
are connected to form the socket body, and the rear cylindrical body 3
A hexagonal tightening nut 4 is screwed onto the outer periphery of the hexagonal tightening nut 4. A locking part 5 is provided on the right side of the tightening nut 4 in FIG. . 8
is an engaging portion protruding from the outer periphery of the rear end portion. Reference numeral 10 denotes a screw hole for connecting a pipe (not shown) provided on the inner surface of the tip of the front cylindrical body 2. A screw hole 10 of a slightly larger diameter is formed adjacent to a locking step 11 that is continuous with the screw hole 10. A hooking portion 13 is provided continuously to the bearing hole 12, and a large diameter portion 14 is formed following the hooking portion 13.

Reference numeral 16 denotes a large cylinder, and a front cylinder part 17 is provided at the tip thereof to be supported in the shaft bearing hole 12, and a body part 19 is provided at the rear of the front cylinder part 17 via a stepped part 18 that engages with the hook part 13. A locking step portion 2 is inserted into the large-diameter hole 7 and engaged with the outer surface of the locking wall 6 at the rear of the body portion 19.
A rear cylindrical portion 21 is formed through 0.

An O-ring 22 is attached to the outer periphery of the tip of the front cylinder part 17 to seal the space between it and the shaft bearing hole 12, and an engaging ring 24 is fixed to a locking ring 23 attached to the outer periphery of the front part of the body part. A strong spring 25 is installed between the inner surface of the locking wall 6 and the inner cylinder 1.
6 is given a force to advance in an anti-outward direction.

27 is a valve port provided approximately in the middle of the inner cylinder 16;
A valve body 26 springed from the front side of the inner cylinder is seated, a housing chamber 28 for housing a plug to be described later is provided at the rear side of the valve port 27, and a seal ring 29 is attached to the inner surface of the housing chamber. At the same time, lock balls 31 having a diameter larger than the wall thickness of the rear cylinder part are loosely fitted into a plurality of taper holes 30 formed in the same circumferential shape on the peripheral surface of the rear cylinder part 21 in which the storage chamber 28 is located inside. .

Reference numeral 35 denotes a sleeve having a pressing surface 36 for restraining the lock ball, which is slidably and rotatably attached to the outer periphery of the rear cylinder section 21, and is connected to the inner surface of the sleeve 35 and the locking wall 6.
The spring 37 is activated between the sleeve and the large diameter portion of the front end of the sleeve is engaged with the engaging portion 8, and a stop spring 38 that engages the engaging portion 8 is attached to the inner surface of the front end of the sleeve to prevent the sleeve from coming out. The socket 1 is formed by preventing this.

Note that the notch 3 provided on one side of the front part of the sleeve 35
A locking pin or locking ball 33 that engages with the locking mechanism 9 is provided protruding from the outer surface of the rear body 3 to constitute a locking mechanism 40.

Reference numeral 42 denotes a plug that is detachably connected to the housing chamber 28 of the socket, and has a hexagonal tightening nut 4 on the outer periphery.
3, and a locking recessed groove 44 with which the lock ball 31 engages is provided on the outer periphery of the approximately middle portion of the plug.
45 is a screw hole for pipe connection provided inside the rear end,
A valve port 46 is formed at the center of the tip of the plug 42, and a valve body 47 spring-loaded from the rear side of the valve port 46 is seated.

Next, how to connect the socket 1 and the plug 42 will be explained.

First, the sleeve 35 is moved to the left in FIG. 1 against the force of the spring 37 to remove the pressing portion 36 from the lock ball 31, thereby making the ball free.

Then, insert the plug 42 into the housing chamber 28 of the socket.
When the ball is engaged with the engagement groove 44 and the hand is released from the sleeve 3, the elastic force of the spring 37 causes the sleeve to move in the left-right direction in FIG. is pressed in the axial direction, and the socket 1 and the plug 42 are firmly connected, and at the same time, the valve bodies 26 and 47, which the socket and the plug have individually, butt against each other, each retreating against the spring, and the valves are closed to each other. Ports 27 and 46 are opened to allow fluid to flow. Next, by rotating the sleeve 35 in the circumferential direction and shifting the positions of the locking pin 33 and the notch 39 from each other as shown by solid lines in FIG. Even if an external force is applied to the sleeve 35, the strong elastic force of the spring 25 acts on the inner cylinder 16 that supports the sleeve 35, and a force that presses the sleeve against the locking pin 33 on the inner cylinder 16 acts on the sleeve 35. Therefore, the sleeve 35 will not rotate and the locking pin 33 will not move into the notch 39. Therefore, the third
There is no force to move the sleeve 35 to the left in FIGS. 5 and 5, and the plug 42 will not come off inadvertently.

If a large tensile force greater than the elastic force of the spring 25 is applied when the socket 1 and the plug 42 are in the above-mentioned connected state, the inner cylinder 16 of the socket 1 will resist the elastic force of the spring 25 and move into the third and fourth positions. Lock ball 3 moving to the right in the figure and attached to the rear body
1 and 31 are removed from the pressing surface 36 of the sleeve. At this time, the ball 31 becomes movable outward in the radial direction of the inner cylinder 16, and as a result, the ball 31 disengages from the engagement groove 44 of the plug, so that the plug 42 disengages from the accommodation chamber 28 of the socket 1 and simultaneously closes the socket. The valve bodies 25 and 47 built into the plug close the valve ports 27 and 46, respectively, and cut off the gas flow path. At the same time that the plug 42 is removed from the inner cylinder 16 of the socket 1, the inner cylinder 16 is moved to the left in FIG. 4 by the elastic force of the spring 25 and returned to its original position.

As is clear from the above embodiments, the present invention enables the locking ball 31 provided in the socket 1 to engage and disengage the engagement groove 44 formed in the plug 42, thereby locking the valve body 26 provided separately in the socket 1 and the plug 42. ,4
7 elastically press each other to open and connect and separate the two, and the lock ball is inserted into the socket 1.
In a pipe with valve bodies 26, 47 that are released or restrained by operating a sleeve 35 fitted on the outer periphery,
The inner cylinder 16, which is biased by a strong spring 25 to advance in the counter-outward direction, is fitted into the socket 1 so as to be slidable in the axial direction, and the lock ball can freely move in and out from the wall surface of the inner cylinder 16. The sleeve 35 and the socket body are further provided with a locking mechanism 40 that restricts the movement of the sleeve 35 in the axial direction when the socket and plug are connected. If the cylinder is used to connect with a copper pipe, even if the cylinder collapses due to an earthquake or is knocked down by careless human action, the large tensile force (pulling force) at that time will cause the spring 25 to The inner cylinder 16 holding the lock ball 31 moves against the elastic force, and the lock ball 31 is momentarily released from the restraining force of the sleeve 35, and the socket 1 and plug 4 are released.
It is possible to separate the two. In this way, according to the present invention, the cylinder can be safely disconnected from the piping, thereby preventing damage to piping systems such as rubber hoses and copper pipes, and by extension preventing gas explosion accidents. .

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; Fig. 1 is a partially cutaway front view of the socket, Fig. 2 is a partially cutaway front view of the plug, and Fig. 3 is a state in which the socket and plug are connected. Fig. 4 is a partially cutaway front view showing the condition when a large force is applied in the direction of pulling out the plug, and Fig. 5 is a partially cutaway front view showing the state when a large force is applied in the direction of pulling out the plug. It is a front view showing a state. DESCRIPTION OF SYMBOLS 1...Socket, 16...Inner cylinder, 25...Spring, 26, 47...Valve body, 31...Lock ball, 35...Sleeve, 37...First spring, 40...Lock mechanism, 42... Plug, 44
...Engagement groove.

Claims (1)

[Scope of utility model registration request] Due to the engagement and disengagement between the lock ball provided on the socket and the engagement groove formed on the plug, the valve bodies separately provided on the socket and plug elastically press against each other and open to connect and separate the two. In addition, in a pipe joint with a valve body that releases or restrains the lock ball by operating a sleeve fitted to the outer circumference of the socket, an inner cylinder biased by a strong spring to advance in an anti-outward direction is inserted into the socket. The lock ball is provided on the wall surface of the inner cylinder so that it can freely move in and out in the inner and outer directions, and the sleeve and the socket body are fitted so that they can slide freely in the axial direction. Pipe fittings with a locking mechanism that regulates