CN219300186U

CN219300186U - Expansion joint of metal corrugated pipe

Info

Publication number: CN219300186U
Application number: CN202223443734.6U
Authority: CN
Inventors: 彭建
Original assignee: Wuhan Zhongdian Regional Energy Development Co ltd
Current assignee: Wuhan Zhongdian Regional Energy Development Co ltd
Priority date: 2022-12-22
Filing date: 2022-12-22
Publication date: 2023-07-04
Anticipated expiration: 2032-12-22

Abstract

The utility model discloses a metal corrugated pipe expansion joint which comprises a corrugated pipe body and two connecting flanges, wherein connecting ends are fixedly arranged at two ends of the corrugated pipe body, sealing rings are arranged on one side surfaces of the two connecting flanges, an annular sealing groove matched with the connecting ends is formed in one side surface of each sealing ring, an annular sealing gasket is arranged in each arc sealing groove, a rubber sealing ring is sleeved on the outer wall of an inner ring of each annular sealing groove, and four bolt mounting holes are formed in the surfaces of the two connecting flanges. The corrugated pipe is provided with the corrugated pipe body, the two connecting flanges, the two connecting ends, the two sealing rings, the annular sealing gasket and the rubber sealing ring, has the advantages of saving space and materials, being applicable to standardized mass production, being good in integral sealing performance, being convenient to detach and replace the corrugated pipe body and the connecting flanges when the corrugated pipe body is damaged and needs to be replaced, and being convenient to detach and replace.

Description

Expansion joint of metal corrugated pipe

Technical Field

The utility model relates to the technical field of corrugated pipes, in particular to a metal corrugated pipe expansion joint.

Background

Expansion joints are also conventionally known as compensators, or telescopic joints. The device consists of a corrugated pipe (an elastic element) which forms a working main body of the device, and accessories such as an end pipe, a bracket, a flange, a conduit and the like. Expansion joints are a flexible structure provided on the vessel shell or pipe in order to compensate for additional stresses caused by temperature differences and mechanical vibrations. The effective expansion and contraction deformation of the corrugated pipe of the working main body is utilized to absorb the dimensional changes of pipelines, ducts, containers and the like caused by expansion due to heat, contraction due to cold and the like, or compensate the axial, transverse and angular displacement of the pipelines, ducts, containers and the like. And can also be used for noise reduction and vibration reduction.

The bellows expansion joint is an expansion joint made of metal bellows. The expansion joint of the corrugated pipe can stretch out and draw back along the axial direction of the pipeline and also allows a small amount of bending, has the advantages of saving space and saving materials, and can be used for standardized mass production, but has the defects of short service life, and when the expansion joint is damaged, the expansion joint and the corrugated pipe are difficult to detach and replace after being damaged due to the adoption of a welding mode, so that the expansion joint of the corrugated pipe is needed.

Disclosure of Invention

The utility model aims to provide a metal bellows expansion joint to solve the problems in the background art.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a metal bellows expansion joint, includes bellows body and two flange, the both ends of bellows body are all fixed to be provided with the link, and a side of two flange all is provided with the sealing ring, a side of sealing ring seted up with the annular seal groove that the link matches, be provided with annular seal in the annular seal groove and fill up, just the cover is equipped with rubber seal on the inner circle outer wall of annular seal groove.

Preferably, four bolt mounting holes are formed in the surfaces of the two connecting flanges.

Preferably, an external thread I is formed on the outer wall of the connecting end, and the connecting end is in threaded connection with the annular sealing groove through the external thread I.

Preferably, four through holes which are distributed annularly are formed in the surfaces of the connecting flanges, a guide rod is arranged between the two corresponding through holes on the connecting flanges, a first limit disc is fixedly arranged at one end of the guide rod, and a second limit disc is movably arranged at one end of the guide rod.

Preferably, a reset spring is arranged on one side surface of the first limit disc and one side surface of the second limit disc, and the two reset springs are sleeved on the surface of the guide rod.

Preferably, an external thread II is arranged on one end surface of the guide rod, and the guide rod is in threaded connection with the limiting plate II through the external thread II.

Compared with the prior art, the utility model has the beneficial effects that: the corrugated pipe is provided with the corrugated pipe body, the two connecting flanges, the two connecting ends, the two sealing rings, the annular sealing gasket and the rubber sealing ring, has the advantages of saving space and materials, being applicable to standardized mass production, being good in integral sealing performance, being convenient to detach and replace the corrugated pipe body and the connecting flanges when the corrugated pipe body is damaged and needs to be replaced, and being convenient to detach and replace.

Drawings

FIG. 1 is a schematic view of a split structure of two connecting flanges and a bellows body of the present utility model;

FIG. 2 is a schematic view of a front cross-sectional structure of the present utility model;

fig. 3 is an enlarged schematic view of a portion a in fig. 2.

In the figure: 1. a bellows body; 2. a connecting flange; 3. a connection end; 4. a seal ring; 5. an annular seal groove; 6. an annular gasket; 7. a rubber seal ring; 8. a bolt mounting hole; 9. a guide rod; 10. a first limiting disc; 11. a second limiting plate; 12. and a return spring.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-3, the present utility model provides a technical solution: the expansion joint of the metal corrugated pipe comprises a corrugated pipe body 1 and two connecting flanges 2, wherein the two ends of the corrugated pipe body 1 are welded with connecting ends 3, one side surface of each connecting flange 2 is welded with a sealing ring 4, one side surface of each sealing ring 4 is provided with an annular sealing groove 5 matched with the connecting end 3, an annular sealing gasket 6 made of rubber is arranged in each annular sealing groove 5, and the outer wall of the inner ring of each annular sealing groove 5 is sleeved with a rubber sealing ring 7;

four bolt mounting holes 8 are formed in the surfaces of the two connecting flanges 2;

the outer wall of the connecting end 3 is provided with an external thread I, and the connecting end 3 is in threaded connection with the annular sealing groove 5 through the external thread I;

in order to carry out spacing wire to bellows body 1 for bellows body 1 only can carry out axial extension, four through-holes that are annular distribution have all been seted up on the surface of two flange 2, install guide bar 9 between two through-holes that correspond on two flange 2, the one end fixed mounting of guide bar 9 has spacing dish one 10, and the one end movable mounting of guide bar 9 has spacing dish two 11, reset spring 12 is all installed to one side of spacing dish one 10 and spacing dish two 11, two reset springs 12 all overlap and establish the surface at guide bar 9, the one end surface mounting of guide bar 9 has external screw thread two, guide bar 9 passes through external screw thread two and spacing dish two 11 threaded connection.

Working principle: when the corrugated pipe is used, the corrugated pipe body 1 is fixedly connected with the connecting end 3 in a welding mode, then the corrugated pipe body 1 is in threaded connection with the annular sealing groove 5 on the sealing ring 4 through the connecting end 3, so that the corrugated pipe body 1 is connected with the connecting flange 2, double sealing is carried out between the corrugated pipe body 1 and the connecting flange through the annular sealing gasket 6 and the rubber sealing ring 7, tightness after connection is guaranteed, the corrugated pipe body is connected with an external pipeline through the connecting flange 2, when the corrugated pipe body 1 is damaged subsequently, the corrugated pipe body 1 and the connecting flange 2 are connected through threads, separation between the corrugated pipe body 1 and the connecting flange 2 is facilitated, the corrugated pipe body 1 is replaced with new corrugated pipe body 1 again, and disassembly and replacement are convenient.

It is noted that relational terms such as first and second, and the like are 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. Moreover, 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 utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a metal bellows expansion joint, includes bellows body (1) and two flange (2), its characterized in that: the corrugated pipe is characterized in that connecting ends (3) are fixedly arranged at two ends of the corrugated pipe body (1), sealing rings (4) are arranged on one side surfaces of the two connecting flanges (2), annular sealing grooves (5) matched with the connecting ends (3) are formed in one side surface of the sealing rings (4), annular sealing gaskets (6) are arranged in the annular sealing grooves (5), and rubber sealing rings (7) are sleeved on the outer wall of the inner ring of the annular sealing grooves (5).

2. A metal bellows expansion joint according to claim 1, wherein: four bolt mounting holes (8) are formed in the surfaces of the two connecting flanges (2).

3. A metal bellows expansion joint according to claim 1, wherein: an external thread I is formed on the outer wall of the connecting end (3), and the connecting end (3) is in threaded connection with the annular sealing groove (5) through the external thread I.

4. A metal bellows expansion joint according to claim 1, wherein: four through holes which are distributed annularly are formed in the surfaces of the connecting flanges (2), guide rods (9) are arranged between the two corresponding through holes on the connecting flanges (2), one end of each guide rod (9) is fixedly provided with a first limiting disc (10), and one end of each guide rod (9) is movably provided with a second limiting disc (11).

5. A metal bellows expansion joint according to claim 4, wherein: and a reset spring (12) is arranged on one side surface of the first limit disc (10) and one side surface of the second limit disc (11), and the two reset springs (12) are sleeved on the surface of the guide rod (9).

6. A metal bellows expansion joint according to claim 5, wherein: an external thread II is arranged on one end surface of the guide rod (9), and the guide rod (9) is in threaded connection with the limiting disc II (11) through the external thread II.