CN216813384U

CN216813384U - Anti-scouring corrosion jacketed pipe expansion joint

Info

Publication number: CN216813384U
Application number: CN202122335690.4U
Authority: CN
Inventors: 宋友立; 王国圈; 张蒲根; 殷小明; 王克; 董樑; 林金峰
Original assignee: Shanghai Special Equipment Supervision and Inspection Technology Institute
Current assignee: Shanghai Special Equipment Supervision and Inspection Technology Institute
Priority date: 2021-09-26
Filing date: 2021-09-26
Publication date: 2022-06-24
Anticipated expiration: 2031-09-26

Abstract

The utility model relates to an anti-erosion and anti-corrosion jacketed pipe expansion joint which comprises an outer pipe, an inner pipe and an anti-erosion pipe, wherein the outer pipe is provided with an outer corrugated pipe, the inner pipe is provided with an inner corrugated pipe, the inner pipe is arranged in the outer pipe, outer corrugations of the inner corrugated pipe and inner corrugations of the outer corrugated pipe are arranged in a mutually staggered mode, and the anti-erosion pipe is arranged in the inner pipe. Compared with the prior art, the utility model has the advantages of effectively reducing the whole size, the displacement generated at the corrugated pipe caused by the expansion of the inner-layer pipeline, the thermal stress, avoiding the pull-off of the welding line and the like.

Description

Anti-scouring corrosion jacketed pipe expansion joint

Technical Field

The utility model relates to the technical field of expansion joints, in particular to an anti-scour corrosion jacketed pipe expansion joint.

Background

The expansion joint is a flexible element that is disposed on the vessel shell or pipe to effectively compensate for axial deformation in order to compensate for additional stresses caused by temperature differences and mechanical vibrations. Expansion joints are also conventionally called compensators, or expansion joints. As the expansion joint is an elastic compensation element capable of freely stretching, the expansion joint has the advantages of reliable work, good performance, compact structure and the like, and is widely applied to chemical, metallurgical, nuclear and other departments.

An expansion joint of the prior art is composed of a main body of corrugated pipe (an elastic element), an end pipe, a support, a flange, a conduit and the like. The working principle is that the effective telescopic deformation of the main corrugated pipe is utilized to absorb the dimensional change of pipelines, conduits, containers and the like caused by expansion and contraction due to heat and the like or compensate the axial, transverse and angular displacement of the pipelines, the conduits, the containers and the like. The compensator is arranged on the pipeline to compensate the thermal extension of the pipeline, thereby reducing the stress of the pipeline wall and the acting force acting on the valve member or the bracket structure.

However, the existing expansion joint structure has the following problems: 1. the single pipeline has poor heat insulation performance, and the use of the outer sleeve pipe easily causes the oversize of the whole size or the pull-off of a welding line. 2. Because turbulence is generated at the corrugated pipe, erosion corrosion is easily caused to the corrugated pipe, and the service life is reduced.

SUMMERY OF THE UTILITY MODEL

The present invention aims to overcome the above-mentioned drawbacks of the prior art and to provide an anti-erosion jacketed pipe expansion joint.

The purpose of the utility model can be realized by the following technical scheme:

the utility model provides a double-layered sleeve pipe expansion joint of scour protection corruption, includes outer pipeline, inlayer pipeline and scour protection pipeline, outer bellows has on the outer pipeline, bellows in having on the inlayer pipeline, the inlayer pipeline sets up in outer pipeline, and the outside ripple of bellows and the inboard ripple of outer bellows are crisscross the setting mutually in the outside ripple of while, the scour protection pipeline sets up in the inlayer pipeline.

Further, still include first flange and second flange, first flange is located one side of outer pipeline, and outer pipeline, inlayer pipeline and scour protection pipeline are connected to this first flange, the second flange is located the opposite side of outer pipeline, and this second flange only connects outer pipeline and inlayer pipeline.

Further, the first flange is used for welding the outer layer pipeline and the inner layer pipeline; and the second flange is used for welding the outer layer pipeline and the inner layer pipeline.

Further, the first flange is connected with an anti-impact pipeline through bolts.

Further, be equipped with the mounting groove on the first flange, the one end of scour protection pipeline is equipped with the mounting disc, the mounting disc fix in the mounting groove to it is fixed with the mounting groove through the bolt.

Further, the other end of the scour protection pipeline penetrates through the inner corrugated pipe part of the inner layer pipeline.

Furthermore, the number of the convex rings of the outer corrugated pipe is greater than that of the convex rings of the inner corrugated pipe, and two sides of each convex ring of the inner corrugated pipe are respectively provided with one convex ring of the outer corrugated pipe.

Further, outer pipeline, inlayer pipeline and scour protection pipeline coaxial axle center set up.

Furthermore, the outer layer pipeline, the inner layer pipeline and the scour prevention pipeline are all metal pipelines.

Compared with the prior art, the utility model has the following beneficial effects:

1. the utility model designs the outer layer pipeline with the outer corrugated pipe and the inner layer pipeline with the inner corrugated pipe, and the corrugated pipes of the outer and inner corrugated pipes are mutually staggered to form a sleeve structure with a heat preservation function, so that the overall size is effectively reduced; meanwhile, the structure can effectively deal with the displacement generated at the corrugated pipe caused by the expansion of the inner layer pipeline, reduce the thermal stress and avoid the pull-off of the welding line.

2. According to the utility model, the anti-scouring pipeline is arranged, so that the inner corrugated pipe is prevented from being directly scoured by a medium, the scouring corrosion of turbulence is reduced, the service life of the expansion joint can be effectively prolonged, and the safe operation of the pipeline is ensured.

3. The scour protection pipeline is connected with the first flange through bolts, and maintenance and replacement are facilitated.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Reference numerals: 1. outer pipeline, 11, outer bellows, 2, inner pipeline, 21, interior bellows, 3, scour protection pipeline, 31, mounting disc, 4, first flange, 41, mounting groove, 5, second flange.

Detailed Description

The utility model is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.

As shown in fig. 1, the present embodiment provides an erosion and corrosion resistant jacketed pipe expansion joint, which comprises an outer pipe 1, an inner pipe 2, an erosion resistant pipe 3, a first flange 4 and a second flange 5. The inner layer pipeline 2 is arranged in the outer layer pipeline 1, and the anti-impact pipeline 3 is arranged in the inner layer pipeline 2; that is to say, the outer layer pipeline 1, the inner layer pipeline 2 and the anti-impact pipeline 3 are coaxially arranged and directly have a certain gap with each other. The first flange 4 is positioned at one side of the outer layer pipeline 1, and the first flange 4 is connected with the outer layer pipeline 1, the inner layer pipeline 2 and the anti-impact pipeline 3; a second flange 5 is positioned at the other side of the outer pipe 1, and the second flange 5 connects only the outer pipe 1 and the inner pipe 2.

An outer corrugated pipe 11 is arranged at the middle position of the outer pipe 1, an inner corrugated pipe 21 is arranged at the middle position of the inner pipe 2, and the outer corrugations of the inner corrugated pipe 21 and the inner corrugations of the outer corrugated pipe 11 are arranged in a mutually staggered mode. The number of convex circles on the outer corrugated pipe 11 is greater than that of the convex circles of the inner corrugated pipe 21, so that two sides of the convex circle of each inner corrugated pipe 21 are respectively provided with one convex circle of the outer corrugated pipe 11. In this embodiment, the number of the convex rings of the outer bellows 11 is four, and the number of the convex rings of the inner bellows 21 is three. The structure can effectively deal with the convex ring displacement of the inner corrugated pipe 21 caused by the expansion of the inner pipeline 2, reduce the thermal stress and improve the installation stability of the inner pipeline 2.

In the embodiment, the first flange 4 is used for welding the outer-layer pipeline 1 and the inner-layer pipeline 2; the second flange 5 is used for welding the outer layer pipeline 1 and the inner layer pipeline 2; the first flange 4 is connected with the scour protection pipe 3 through bolts. The specific development is as follows: be equipped with a mounting groove 41 on the first flange 4, the one end of scour protection pipeline 3 is equipped with mounting disc 31, and mounting disc 31 is fixed in mounting groove 41 to it is fixed with mounting groove 41 through the bolt. The other end of the anti-impact pipeline 3 penetrates through the inner corrugated pipe 21 of the inner pipeline 2, so that the inner corrugated pipe 21 is prevented from being directly washed by a medium, the washing corrosion of turbulence is reduced, the service life of an expansion joint can be effectively prolonged, and the safe operation of the pipeline is guaranteed. The bolt structure is also convenient for maintenance and replacement.

The materials of the outer layer pipeline 1, the inner layer pipeline 2 and the anti-impact pipeline 3 are not limited generally, and all are metal pipelines in the embodiment.

The foregoing detailed description of the preferred embodiments of the utility model has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.

Claims

1. The utility model provides a double-layered sleeve pipe expansion joint of scour protection corruption, its characterized in that, includes outer pipeline (1), inner pipeline (2) and scour protection pipeline (3), outer bellows (11) have on outer pipeline (1), bellows (21) in having on inner pipeline (2), inner pipeline (2) set up in outer pipeline (1), and the outside ripple of bellows (21) and the inboard ripple of outer bellows (11) set up in a staggered way mutually simultaneously, scour protection pipeline (3) set up in inner pipeline (2).

2. An erosion and corrosion resistant jacketed pipe expansion joint according to claim 1, further comprising a first flange (4) and a second flange (5), wherein the first flange (4) is located on one side of the outer pipe (1), the first flange (4) connects the outer pipe (1), the inner pipe (2) and the erosion resistant pipe (3), the second flange (5) is located on the other side of the outer pipe (1), and the second flange (5) connects only the outer pipe (1) and the inner pipe (2).

3. An erosion and corrosion resistant jacketed pipe expansion joint according to claim 2, characterized in that the first flange (4) welds the outer pipe (1) and the inner pipe (2); and the second flange (5) is welded with the outer layer pipeline (1) and the inner layer pipeline (2).

4. An erosion and corrosion resistant jacketed pipe expansion joint according to claim 2, characterized in that the first flange (4) is bolted to the erosion protection pipe (3).

5. An erosion and corrosion resistant jacketed pipe expansion joint according to claim 4, characterized in that the first flange (4) is provided with a mounting groove (41), one end of the erosion resistant pipe (3) is provided with a mounting plate (31), and the mounting plate (31) is fixed in the mounting groove (41) and fixed with the mounting groove (41) by bolts.

6. An erosion and corrosion resistant jacketed pipe expansion joint according to claim 5, characterized in that the other end of the erosion protection pipe (3) passes through the inner bellows (21) part of the inner pipe (2).

7. An erosion and corrosion resistant jacketed pipe expansion joint according to claim 1, characterized in that the number of the convex rings of the outer corrugated pipe (11) is greater than the number of the convex rings of the inner corrugated pipe (21), and two sides of each convex ring of the inner corrugated pipe (21) are respectively provided with one convex ring of the outer corrugated pipe (11).

8. An erosion and corrosion resistant jacketed pipe expansion joint according to claim 1, characterized in that the outer (1), inner (2) and erosion resistant (3) pipes are arranged coaxially.

9. An erosion and corrosion resistant jacketed pipe expansion joint according to claim 1, characterized in that the outer (1), inner (2) and erosion resistant (3) pipes are metal pipes.