JPH0314633Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a pipe joint used for connection using fluid.

[Prior art] With regard to joints used in automobile engine test lines, etc., various test machines and engines are frequently connected, so the connection can be completed quickly.
Also, it must be done to ensure that there are no leaks or omissions.

In conventional fittings, a pipe is inserted into a socket and compressed air is supplied to the inside of a seal ring that contacts the outer circumferential surface of the pipe, thereby causing the pipe and seal ring to expand and press against each other to prevent fluid from leaking to the outside. In addition, by rotating the handle, the shallow part of the slanted recess of the rotary sleeve is moved to the position of the ball, and the ball is locked by pressing it against the outer circumferential surface of the pipe.
It is known from the publication No. 6592.

In other pipe joints, as shown in Japanese Utility Model Application Publication No. 11084/1984, a pipe with a flange on the outer periphery of the tip is inserted into the insertion part of the socket, and the locking lever is pressed. There is also generally known a structure in which the pipe and the socket are locked by engaging the claw at the tip of the stop lever with the collar of the pipe.

[Problems to be solved by the invention] However, in the pipe joint of the structure shown in Japanese Utility Model Application Publication No. 62-6592, it is difficult to confirm that the pipe is inserted into the socket securely and that the ball is locked. After that, compressed air must be supplied to the inside of the seal ring to seal it. If you do this in the wrong order, it will not lock (the pipe will come into contact with the expanded seal ring, and the pipe will not reach the position of the ball). was not inserted), and it would be extremely dangerous if fluid was supplied into the pipe in this condition. Also, the seal ring may be damaged by chips etc., resulting in an incomplete seal.
There were drawbacks such as fluid leakage to the outside, and the handle becoming loose and unlocked due to vibrations.

In addition, in Utility Model Application Publication No. 61-11084, the structure is such that the pipe is inserted into the fitting part of the socket, so when the diameter of the pipe changes, it is necessary to replace the socket with one that matches the diameter of the pipe. However, there was a drawback that there was a lot of time wasted when testing engines with various pipe diameters.

[Means for solving the problem] The technical means according to the present invention is provided with a locking mechanism that uses pressure fluid to project a piston to the outer circumference to swing the locking pawl inward,
It also includes a piston rod that is moved inside the socket by pressure fluid, and a seal that is compressed and expanded by the movement of the piston rod.

[Operation] After inserting a pipe with a flange on the outer periphery of the tip into the socket, pressurized fluid is supplied to the pressurizing chamber formed in the socket to cause the piston to protrude outward, thereby locking the locking pawl. At the same time, the pressure fluid causes the sealing material attached to the outer circumference of the piston rod sliding in the socket to compress and expand. The sealing material and the inside of the pipe are privately sealed.

When removing the pipe from the socket, stop the supply of pressure fluid, the locking lever will automatically return to its original position using the tension ring, and the lock will be released by releasing the collar of the pipe, and the piston rod in the socket will also be released. By returning to the original state, the seal between the sealing material and the pipe is released.

[Example] An example of the present invention will be described with reference to the drawings.
FIG. 1 is a sectional view of a pipe joint according to the present invention, and FIG. 2 is a sectional view taken along line A'-A' in FIG.

P is a pipe such as an engine water supply and drainage port, for example, and a locking flange P1 is formed on the outer periphery of the tip.

S is a socket, and a freely slidable piston rod 2 is installed inside the cylinder body 1, and a connecting pipe 3 having an insertion port 3a for a test machine, etc. is screwed into one end of the cylinder body 1. It is worn.

A cylinder chamber 4 is formed between the piston rod 2 and the connecting pipe 3, and a spring 5 is installed inside the cylinder chamber 4 to constantly press the piston rod 2 in one direction (to the left in FIG. 1).

5a is an air vent hole of the cylinder chamber 4.

A chamber 7 having a plurality of (two in this invention) push-up pins 6 is provided at the other end of the cylinder body 1, and the push-up pins 6 are attached to this chamber 7 so as to be able to slide up and down. This push-up pin 6
One end of the cylinder projects outward from the cylinder body 1. Further, the small diameter portion of the push-up pin 6 is guided by a metal 61 and also serves to prevent it from coming off. The lower part of the large diameter portion is a pressurizing chamber 62, and this pressurizing chamber 62 and the cylinder chamber 4a communicate with each other through a communication passage 1a.

In addition, in the pressurizing chamber 62, the supply hole 11 provided in the cylinder body 1 as shown in FIG.
It is communicated with through a communication path 1b. Therefore, the supply hole 11→the communicating passage 1b→the pressurizing chamber 62→the communicating passage 1a→the cylinder chamber 4a are in communication with each other.

One end of the push-up pin 6 projecting to the outside is in contact with a locking lever 8, and the locking lever 8 is swingably supported by a pin 9 at its center. 91 is a pin holder. Further, a claw portion 8a is formed at one end of the locking lever 8, and the claw portion 8a and the collar P1 of the pipe P are engaged with each other.

A tension ring 10 is wound around the vicinity of the other end of the claw portion 8a, and in a normal state, the locking lever 8 and the push-up pin 6 are constantly brought into contact with each other.

A nut 21 is fixed to the outer periphery of the pipe-side end of the piston rod 2, and a sealing material A having a hollow interior is installed between the protrusion 21a of the nut 21 and the supporting material 22. When the piston rod slides, the sealing material A is compressed and expanded between the protrusion 21a of the nut 21 and the support member 22.

When the pipe P is inserted into the socket S and the end of the pipe P is in contact with the support member 22 as shown in FIG. 1, when pressurized fluid is supplied from the supply hole 11, the pressurized fluid passes through the communication path 1b. By flowing into the pressurizing chamber 62 and pushing the push-up pin 6 outward, the locking lever 8 moves the pipe P with the pin 9 as a fulcrum.
The claw portion 8a of the locking lever 8 locks into the pipe P.
At the same time, pressurized fluid flows into the cylinder chamber 4a from the communication passage 1a, causing the piston rod 2 to slide to the right in FIG. The sealing material A located between the protruding portion 21a and the support member 22 is compressed and expanded, and is pressed against the inner circumferential surface of the pipe P to be sealed.

As described above, the connection and sealing between the pipe P and the socket S is completed, and various tests on the engine are performed in this state. After that, in order to separate the pipe P and the socket S, when the pressurized fluid from the supply hole 11 is stopped, the supply of fluid to the pressurizing chamber 62 is stopped. 10, the locking lever 8 acts in the direction of pushing the push-up pin 6 inward using the pin 9 as a fulcrum, and the collar P1 of the pipe P and the claw portion 8a of the locking lever 8
The lock is released. The piston rod 2 is slid to the left in FIG.
The seal between the socket and the socket S is released, and the state shown in FIG. 1 is reached.

[Function] As described above, according to the present invention, pressurized fluid is supplied from the supply hole 11 with the pipe P inserted into the socket S, and the locking lever 8 is swung by the push-up pin 6 to lock the pipe P. By locking the retaining pawl 8a and the collar P1 of the pipe P and compressing and expanding the sealing material by sliding the piston rod 2, the structure seals the sealing material A and the inner periphery of the pipe P.
Connection and sealing are completed at the same time by supplying pressurized fluid, which prevents accidents caused by incorrect operating procedures.Also, since the sealing material is compressed and expanded to seal with the pipe, the sealing material is free from chips. Even if it is damaged by such things, it will not affect the sealing force in any way. In addition, even if the diameter of the pipe is different, it can be covered within the expansion rate of the sealing material.
Even if the diameter of the pipe is slightly different, it can be fully accommodated. Furthermore, if the pipe can be automatically inserted into the socket, the test line for engines, etc. can be automated.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the pipe joint of the present invention, and the second
The figure is a sectional view taken along line A'-A' in FIG. P... Pipe, S... Socket, A... Seal material, 1... Cylinder body, 2... Piston rod, 6... Push-up pin, 8... Locking lever, 8a
...Claw part, 10...Tension ring, 21...Natsuto.

Claims (1)

[Scope of utility model registration request] In pipe fittings that insert a pipe into a socket and mechanically and airtightly connect the two, the locking mechanism is achieved by operating a push-up pin using pressurized fluid and swinging a locking lever that comes into contact with the push-up pin. A locking mechanism that locks with a pawl at the tip of a lever, and a seal that performs sealing by sliding a piston rod using the pressurized fluid and compressing and expanding a sealing material attached to a nut fixed to the end of the piston rod. A pipe joint characterized by being equipped with a mechanism.