JPH0454394A - Tube fitting - Google Patents

Abstract

PURPOSE:To keep a clearance between a receiving port and inserting port uniform in the circumferential direction by setting up a superconductive material at one side of an inmost inner circumferential surface of the receiving port and an outer circumferential surface of the inserting port, and a permanent magnet at the other side, respectively. CONSTITUTION:A sealant holding groove 4 is formed on the inner circumference of an opening end of a receiving port 1, and a ring rubber sealant 5 is installed in the groove. A tubular superconductive material 6 is solidly installed on the inner circumference of the receiving port 1, and on the outer circumference of an inserting port 2, a tubular permanent magnet 7 is fitted in a range over the range of length being inserted into the receiving port 1 and locked tight. According to a suchlike constitution, if the superconductive material 6 is made into a superconductive state and the inserting port 2 is inserted into the receiving port 1, magnetic force of the permanent magnet 7 is repulsed by the superconductive material 6. In consequence, the inserting port 2 is supported in the radial direction by dint of magnetic force over the whole circumference, that is, supported in a state of being floated in the air, so that a clearance between the receiving port 1 and the inserting port 2 becomes uniformized over the whole circumference. Consequently, the possibility that the load of a tube body 1 at the side of the inserting port 2 might act on the sealant 5 is eliminated, thus the sealant 5 is made enough to secure its sealability only.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a pipe joint, and more particularly to a pipe joint which is connected by inserting a socket into a socket.

Conventional technology Conventionally, pipe fittings were connected by inserting a socket into a socket.
An elastic sealing material is placed around the inner circumference of the opening of the socket, and this elastic sealing material is compressed between the outer circumferential surface of the socket inserted into the socket and the socket to ensure a predetermined seal, and the socket is closed. Furthermore, a telescopic pipe joint is known in which an insertable space is formed at the back of the socket so that the socket and the socket can be moved relative to each other in the tube axis direction.

However, in such conventional pipe joints, the weight of the pipe on the insertion side acts on the lower part of the elastic sealing material, and the weight of the pipe is supported by the elastic sealing material. , the gap between the socket and the socket is large at the top and small at the bottom, making it uneven in the circumferential direction. Therefore, as an elastic sealing material, it can support a large load, while also being compressible. There is a problem in that it is necessary to use a special structure that has the necessary sealing performance even if the sealing material is small.

In addition, since the weight of the tube on the insertion port side is supported by the elastic sealing material, it is difficult to expand and contract in the tube axis direction between the socket and the insertion port, and as a result, the amount of expansion and contraction is limited. There is also the problem that it cannot be taken in large quantities.

SUMMARY OF THE INVENTION An object of the present invention is to solve these problems and provide a pipe joint that can make the gap between the socket and the socket uniform in the circumferential direction, and that can expand and contract to a large extent.

Means for Solving the Problems In order to achieve the above objects, the present invention provides a pipe joint in which a socket is inserted into a socket and joined together, in which a sealing material is disposed on the inner periphery of the opening of the socket to press against the outer peripheral surface of the socket. ! However, a superconducting material is disposed on one side of the inner circumferential surface of the deep part of the socket and an outer circumferential surface of the socket facing the inner circumferential surface in the radial direction, and a permanent magnet is disposed on the other side.

Effect According to the above structure, when the superconducting material is in a superconducting state and the socket is inserted into the socket, the permanent magnet and the superconducting material magnetically repel each other, and the socket is supported from the surroundings by magnetic force, so that the socket is not inserted into the socket. 1llIWI between the inner circumferential surface of the mouth and the outer circumferential surface of the socket is uniform in the layer direction. As a result, the sealing material disposed on the inner circumference of the opening of the socket is evenly pressed against the outer peripheral surface of the socket over the entire circumference. Therefore, the pressing force of the sealing material against the outer peripheral surface of the socket only needs to be large enough to ensure sealing performance.
The expansion and contraction movement of the socket and the socket becomes smooth, and as a result, the amount of expansion and contraction can be increased.

Embodiment In FIG. 1, ``■'' is a socket formed at the end of one tube 3, and 2 is a socket formed at the end of the other tube 3. By inserting the insertion port 2, the tube bodies 3 are connected.

A sealing material holding groove 4 is formed on the inner periphery of the open end of the socket 1, and an annular rubber sealing material 5 is attached thereto. The socket 1 is formed to be long so that the inserted socket 2 can move relatively in the tube axis direction, that is, expand and contract, and a cylindrical superconducting material 6 is integrally disposed on the inner periphery of the socket 1 . On the other hand, a cylindrical permanent magnet 7 is fitted and fixed on the outer periphery of the socket 2 over a length range inserted into the socket 1 .

According to such a configuration, when the superconducting material 6 is in a superconducting state and the socket 2 is inserted into the socket 1, the magnetic force of the permanent magnet 7 on the outer periphery of the socket 2 is applied to the superconducting material 6 on the inner periphery of the socket 1. It is repulsed by this. As a result, the socket 2 is supported in the radial direction by magnetic force over the entire circumference and is supported in a suspended state, and the gap between the socket part 1 and the socket part 2 becomes equal over the entire circumference. Therefore, the load of the pipe body 1 of the insertion port 2@ does not act on the sealing material 5, and therefore the sealing material 5 only needs to be constructed with consideration to ensuring sealing performance, and it is sufficient to use a special material. There is no need to use it anymore. Further, the pressing force of the sealing material against the outer circumferential surface of the socket 2 is small, so that the expansion and contraction movements of the socket 1 and the socket 2 are smooth, and the amount of expansion and contraction can be increased accordingly.

Effects of the Invention As described above, according to the present invention, when the superconducting material is in a superconducting state and the socket is inserted into the socket, the permanent magnet and the superconducting material magnetically repel each other, and the socket is moved by magnetic force. It is supported from the surroundings, so the gap between the inner circumferential surface of the socket and the outer circumferential surface of the socket is uniform in the circumferential direction, and therefore a pressure force sufficient to ensure sealing is applied between the sealing material and the outer peripheral surface of the socket. Therefore, the expansion and contraction movement of the receptacle and the socket becomes smooth, and as a result, the amount of expansion and contraction can be increased.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a pipe joint in one embodiment of the present invention. 1... Socket, 2... Socket, 5... Seal material, 6...
...Superconducting material, 7...Permanent magnet. Agent Yoshihiro Morimoto

Claims (1)

[Claims] 1. In pipe fittings that are joined by inserting a socket into a socket, a sealing material that presses against the outer peripheral surface of the socket is placed on the inner circumference of the opening of the socket, and the sealing material is placed in pressure contact with the outer peripheral surface of the socket, and A pipe joint characterized in that a superconducting material is disposed on one of the outer circumferential surfaces of opposing sockets, and a permanent magnet is disposed on the other.