CN212203559U

CN212203559U - Expansion joint

Info

Publication number: CN212203559U
Application number: CN202020959244.3U
Authority: CN
Inventors: 璧垫亥; 赵溥
Original assignee: Tianjin Jintong Valve Manufacturing Co ltd
Current assignee: Tianjin Jintong Valve Manufacturing Co ltd
Priority date: 2020-05-29
Filing date: 2020-05-29
Publication date: 2020-12-22
Anticipated expiration: 2030-05-29

Abstract

The utility model discloses a telescopic joint, take over including outer connecting pipe and interconnection, the left end that the interconnection was taken over runs through the inside of outer connecting pipe and extending to the outer connecting pipe, the surface of outer connecting pipe and the surface of interconnection takeover all coat and have wear-resisting coating, the internal surface of outer connecting pipe and the internal surface of interconnection takeover all coat and have thermal barrier coating, the fixed surface that the interconnection was taken over and is extended to the inside one end of outer connecting pipe is connected with sealing mechanism, the utility model relates to a telescopic joint technical field. This telescopic joint, the fixed surface who extends to the inside one end of outer joint pipe through the inner connection is connected with sealing mechanism, and sealing mechanism includes elastic sealing ring, and elastic sealing ring's external surface is fixedly connected with metal seal circle, sets up metal gasket and metal seal circle around elastic sealing ring, has improved sealing mechanism's sealed effect and anti deformability, slows down sealing mechanism's ageing, extension sealing mechanism's life.

Description

Expansion joint

Technical Field

The utility model relates to an expansion joint technical field specifically is an expansion joint.

Background

The telescopic joint can also be called as a pipeline telescopic joint, a compensator and a telescopic device, and comprises the following components: the corrugated expansion joint, the sleeve expansion joint, the square natural compensation expansion joint and the like are used commonly, the expansion joint can compensate and absorb the expansion deformation of the pipeline caused by heating in the axial direction, the transverse direction and the angular direction, absorb the vibration of equipment, reduce the influence of the vibration of the equipment on the pipeline, and absorb the deformation of earthquake and ground subsidence on the pipeline, because of the expansion caused by heat and the contraction caused by cold of the pipeline, the pipeline needs to generate the stress and the push-pull force of the pipeline wall, the stress of the pipeline wall, the strength of the pipeline and the push-pull force are influenced, the push-pull force is increased, the fixed support of the pipeline needs to be made very large to bear the push-pull force generated by the expansion of the pipeline, so the expansion joint compensation method is utilized to reduce the stress and the push-pull force of the pipeline wall, the expansion joint (expansion joint) is mainly used for compensating the expansion deformation of the pipeline caused by the temperature change, the expansion joint mainly comprises three structural forms, namely a bent pipe type expansion joint, a corrugated pipe expansion joint and a sleeve expansion joint.

The telescopic deformation of the pipeline is compensated by installing the telescopic joint on the pipeline, but a gap exists between the outer pipe and the inner pipe of the conventional telescopic joint, the sealing ring is used for sealing, but the sealing ring is influenced by high temperature and high pressure for a long time, the aging deformation of the sealing ring can be accelerated, and the service life of the sealing ring is shortened.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art, the utility model provides a telescopic joint has solved the sealing washer and has received the highly compressed influence of high temperature for a long time, can accelerate its ageing deformation, shortens sealing washer life's problem.

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: a telescopic joint comprises an outer connecting pipe and an inner connecting pipe, wherein the left end of the inner connecting pipe penetrates through the outer connecting pipe and extends into the outer connecting pipe, the outer surface of the outer connecting pipe and the outer surface of the inner connecting pipe are coated with wear-resistant coatings, the inner surface of the outer connecting pipe and the inner surface of the inner connecting pipe are coated with heat-insulating coatings, and the surface of one end, extending into the outer connecting pipe, of the inner connecting pipe is fixedly connected with a sealing mechanism;

sealing mechanism includes elastic sealing ring, elastic sealing ring's surface fixedly connected with metal seal circle, elastic sealing ring's left side fixedly connected with metal seal piece, the ring channel with metal seal circle looks adaptation is seted up to the surface of interconnection takeover, the spout with metal seal circle looks adaptation is seted up to the inner wall of outer connecting pipe.

Preferably, the surface of the outer connecting pipe is fixedly connected with a first annular plate, and the surface of the inner connecting pipe is fixedly connected with a second annular plate.

Preferably, a threaded rod is connected between the opposite sides of the first annular plate and the second annular plate in a threaded manner, and two ends of the threaded rod penetrate through the first annular plate and the second annular plate respectively and extend to the outer parts of the first annular plate and the second annular plate.

Preferably, the opposite sides of the surfaces of the first annular plate and the second annular plate are movably connected with anti-loosening gaskets, and the surfaces of the first annular plate and the second annular plate and the side, located on the anti-loosening gaskets, of the first annular plate and the second annular plate are in threaded connection with nuts.

Preferably, the left side of the outer connecting pipe is fixedly connected with a first flange, and the right side of the inner connecting pipe is fixedly connected with a second flange.

Preferably, through holes are formed in the surface of the first flange plate and the surface of the second flange plate.

Advantageous effects

The utility model provides an expansion joint. Compared with the prior art, the method has the following beneficial effects:

(1) this telescopic joint, the fixed surface who extends to the inside one end of outer joint pipe through the interconnection takeover is connected with sealing mechanism, sealing mechanism includes elastic sealing ring, elastic sealing ring's fixed surface is connected with the metal seal circle, elastic sealing ring's left side fixedly connected with metal seal piece, the ring channel with metal seal circle looks adaptation is seted up to the surface of interconnection takeover, the spout with metal seal circle looks adaptation is seted up to the inner wall of outer joint pipe, set up metal seal piece and metal seal circle around elastic sealing ring, sealing mechanism's sealed effect and resistance to deformation have been improved, slow down sealing mechanism's ageing, extension sealing mechanism's life.

(2) This telescopic joint, through the equal swing joint in one side that first annular plate and second annular plate surface are relative, the surface of first annular plate and second annular plate and be located one side threaded connection of check washer have the nut, be provided with check washer in the fixed department of threaded rod and nut for the stability of threaded rod and nut fixed department is higher, and the nut is difficult not hard up, and it is convenient safely more to use.

Drawings

FIG. 1 is a sectional view of the structure of the present invention;

FIG. 2 is a perspective view of the structure of the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 1;

fig. 4 is a side sectional view of the inner connecting pipe structure of the present invention.

In the figure: the sealing structure comprises an outer connecting pipe 1, an inner connecting pipe 2, a wear-resistant coating 3, a heat-insulating coating 4, a sealing mechanism 5, an elastic sealing ring 51, a metal sealing ring 52, a metal sealing sheet 53, an annular groove 54, a sliding groove 55, a first annular plate 6, a second annular plate 7, a threaded rod 8, a check gasket 9, a nut 10, a first flange plate 11, a second flange plate 12 and a through hole 13.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-4, the present invention provides a technical solution: an expansion joint comprises an outer connecting pipe 1 and an inner connecting pipe 2, wherein a first flange plate 11 is fixedly connected to the left side of the outer connecting pipe 1, through holes 13 are formed in the surface of the first flange plate 11 and the surface of a second flange plate 12, a plurality of through holes 13 are formed, a second flange plate 12 is fixedly connected to the right side of the inner connecting pipe 2 and is connected with an external pipeline through the first flange plate 11 and the second flange plate 12, a first annular plate 6 is fixedly connected to the surface of the outer connecting pipe 1, a check gasket 9 is movably connected to one side, opposite to the surfaces of the first annular plate 6 and the second annular plate 7, of the first annular plate 6, a nut 10 is movably connected to one side, the check gasket 9 enables the stability of a fixing position of the threaded rod 8 and the nut 10 to be higher, the nut 10 is not easy to loosen and is safer and more convenient to use, a nut 10 is in threaded connection with the surfaces of the first annular plate 6 and the second annular, the two ends of the threaded rod 8 penetrate through the first annular plate 6 and the second annular plate 7 respectively and extend to the outside of the first annular plate 6 and the second annular plate 7, the surface of the inner connecting pipe 2 is fixedly connected with the second annular plate 7, the left end of the inner connecting pipe 2 penetrates through the outer connecting pipe 1 and extends to the inside of the outer connecting pipe 1, the outer surface of the outer connecting pipe 1 and the outer surface of the inner connecting pipe 2 are both coated with wear-resistant coatings 3, the wear-resistant coatings 3 are made of phosphate lead powder, the inner surface of the outer connecting pipe 1 and the inner surface of the inner connecting pipe 2 are both coated with heat-insulating coatings 4, the heat-insulating coatings 4 are made of polyurethane materials, the surface of one end, extending to the inside of the outer connecting pipe 1, of the inner connecting pipe 2 is fixedly connected with a sealing mechanism 5, the sealing mechanism 5 comprises an elastic sealing ring 51, the outer surface of, the elastic sealing ring 51 is surrounded by the metal sealing sheet 53 and the metal sealing ring 52, so that the deformation resistance of the sealing ring is improved, the outer surface of the inner connecting pipe 2 is provided with an annular groove 54 matched with the metal sealing ring 52, and the inner wall of the outer connecting pipe 1 is provided with a sliding groove 55 matched with the metal sealing ring 52.

When the telescopic joint is used, one end of the inner connecting pipe 2 extends into the outer connecting pipe 1, the sealing mechanism 5 is arranged at the joint of the inner connecting pipe 2 and the outer connecting pipe 1, the metal sealing sheet 53 and the metal sealing ring 52 are arranged outside the elastic sealing ring 51, so that the anti-deformation capability of the sealing mechanism 5 is better, the inner connecting pipe 2 can move towards the inside of the outer connecting pipe 1 by unscrewing the nut 10 fixed on the threaded rod 8, the sealing mechanism 5 is driven to move towards the inside of the outer connecting pipe 1 in the process that the inner connecting pipe 2 moves towards the inside of the outer connecting pipe 1, the upper part of the sealing mechanism 5 slides towards the inside of the outer connecting pipe 1 in the sliding groove 55, after the inner connecting pipe 2 is adjusted, the nut 10 is rotated again to the joint of the threaded rod 8 and the first annular plate 6 and the second annular plate 7, the threaded rod 8 is locked, the length of the telescopic joint is fixed, and the anti-loosening gasket 9 is arranged between the nut, the nut 10 is prevented from loosening, the wear-resisting property of the expansion joint is improved by the wear-resisting coating 3, the heat-resisting property of the expansion joint is better by the heat-insulating coating 4, and the normal work of the expansion joint is ensured.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. An expansion joint, includes outer connecting pipe (1) and inner connection pipe (2), its characterized in that: the left end of the inner connecting pipe (2) penetrates through the outer connecting pipe (1) and extends to the inside of the outer connecting pipe (1), the outer surface of the outer connecting pipe (1) and the outer surface of the inner connecting pipe (2) are coated with wear-resistant coatings (3), the inner surface of the outer connecting pipe (1) and the inner surface of the inner connecting pipe (2) are coated with heat-insulating coatings (4), and the surface of one end, extending to the inside of the outer connecting pipe (1), of the inner connecting pipe (2) is fixedly connected with a sealing mechanism (5);

sealing mechanism (5) are including elastic sealing ring (51), the outer fixed surface of elastic sealing ring (51) is connected with metal seal circle (52), the left side fixedly connected with metal seal piece (53) of elastic sealing ring (51), ring channel (54) with metal seal circle (52) looks adaptation are seted up to the surface of in-connection pipe (2), spout (55) with metal seal circle (52) looks adaptation are seted up to the inner wall of outer joint pipe (1).

2. A telescopic joint according to claim 1, wherein: the surface of the outer connecting pipe (1) is fixedly connected with a first annular plate (6), and the surface of the inner connecting pipe (2) is fixedly connected with a second annular plate (7).

3. A telescopic joint according to claim 2, wherein: threaded connection has threaded rod (8) between first annular plate (6) and the opposite one side of second annular plate (7), the both ends of threaded rod (8) run through first annular plate (6) and second annular plate (7) respectively and extend to the outside of first annular plate (6) and second annular plate (7).

4. A telescopic joint according to claim 2, wherein: the surface opposite to one side of the first annular plate (6) and the second annular plate (7) is movably connected with a check washer (9), and the surface of the first annular plate (6) and the second annular plate (7) and the side of the check washer (9) are in threaded connection with a nut (10).

5. A telescopic joint according to claim 1, wherein: the left side fixedly connected with first ring flange (11) of outer joint pipe (1), the right side fixedly connected with second ring flange (12) of in-connection pipe (2).

6. A telescopic joint according to claim 5, wherein: through holes (13) are formed in the surface of the first flange plate (11) and the surface of the second flange plate (12).