Thick-wall expansion joint

Abstract

The utility model provides a thick-wall expansion joint, which relates to the technical field of thick-wall expansion joints and comprises a pipeline, a fixing plate is fixedly connected onto the pipeline, a protective component is arranged on the fixing plate and comprises a first bidirectional hinge, two ends of the first bidirectional hinge are movably connected with first protective plates with the same size, and the two ends of the first bidirectional hinge are movably connected with second protective plates with the same size. The protection assembly further comprises a second bidirectional hinge, by arranging the protection assembly, in a normal state, the two pairs of first protection plates and second protection plates are in a closed state, sealing is achieved, the elastic thick-wall expansion joint in the protection assembly is prevented from making contact with the external environment and being corroded, and when the elastic thick-wall expansion joint needs to be maintained, the elastic thick-wall expansion joint is prevented from being damaged. The second bolt is unscrewed, the fixing state of the first protection plate and the second protection plate is released, the first protection plate and the second protection plate rotate around the first bidirectional hinge and the second bidirectional hinge in the opposite directions, a worker can conveniently maintain the elastic thick-wall expansion joint, and the service life of equipment is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of thick-wall expansion joints, in particular to a thick-wall expansion joint. Background Art

[0002] Expansion joints, also commonly called compensators or expansion joints, consist of a bellows (an elastic element) forming the working body and accessories such as end pipes, brackets, flanges, and conduits. Expansion joints are flexible structures installed on container shells or pipelines to compensate for additional stress caused by temperature differences and mechanical vibration. They utilize the effective expansion and contraction of the bellows to absorb dimensional changes caused by thermal expansion and contraction in pipelines, conduits, and containers, or to compensate for axial, lateral, and angular displacement. They are also used for noise and vibration reduction, as well as for heating. To prevent deformation or damage to heating pipes caused by thermal expansion or temperature stress during heating, compensators are installed on the pipes to compensate for thermal expansion, thereby reducing stress on the pipe wall and forces acting on valves and support structures. As flexible and retractable compensating elements, expansion joints offer advantages such as reliability, excellent performance, and compact structure, making them widely used in the chemical, metallurgical, and nuclear energy sectors. There are many forms of expansion joints used in containers. In terms of the shape of the corrugations, U-shaped expansion joints are the most widely used, followed by Ω-shaped and C-shaped ones. In terms of structural compensation, expansion joints used in pipelines are divided into universal type, pressure-balanced type, hinge type and universal joint type.

[0003] In the prior art, the utility model with the announcement number CN219013667U provides a thick-walled expansion joint that is directly welded into a fluid pipeline, including a metal expansion joint that is sleeved and installed on the outside of the metal straight pipe, and the inner side of the metal expansion joint and the outer side of the metal straight pipe are welded and fixed to each other, and the metal expansion joints are welded to the outside of the metal straight pipe in parallel up and down; a shock absorber is fixedly installed on the inner side wall of the metal expansion joint. The thick-walled expansion joint that is directly welded into the fluid pipeline adopts a new structural design, so that the metal expansion joint is welded and fixedly installed on the outside of the metal straight pipe, and positioning welding pieces are welded and reinforced on the outside of two adjacent groups of metal expansion joints, thereby improving the stability of the metal expansion joint assembly position and preventing it from falling off and separating from the metal straight pipe.

[0004] However, during the actual production and processing process, the applicant found that during the use of thick-walled expansion joints, the working principle of thick-walled expansion joints is based on elastic deformation. When the pipeline or equipment expands or contracts due to temperature changes, the corrugations or folds inside it will deform accordingly to absorb stress and maintain the stability of the system. However, these corrugated parts, as key pressure elements, provide the necessary displacement through deformation during operation and are susceptible to corrosion. For this reason, the present application provides a thick-walled expansion joint. Summary of the Invention

[0005] The purpose of the utility model is to solve the shortcomings of the prior art and provide a thick-wall expansion joint.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions: a thick-walled expansion joint, comprising a pipe, a fixed plate fixedly connected to the pipe, a protective assembly provided on the fixed plate, the protective assembly comprising a first two-way hinge, first protective plates of the same size being movably connected at both ends of the first two-way hinge, the protective assembly further comprising a second two-way hinge, second protective plates of the same size being movably connected at both ends of the second two-way hinge, a slide groove being provided in the first protective plate, the second protective plate being movably connected in the slide groove, and a fixed block being fixedly connected to one end of the first protective plate and the second protective plate away from the first two-way hinge.

[0007] As a preferred embodiment, the fixing block fixes the two symmetrically arranged first protective plates and the second protective plate together through a second bolt, a spring is fixedly connected to the top end of the second protective plate, and the spring is fixedly connected to the first protective plate at one end away from the second protective plate.

[0008] The technical effect of adopting the above-mentioned further scheme is that the pipeline will be subject to different degrees of corrosion in different working environments for a long time. When the staff installs the elastic thick-walled expansion joint, a first protective plate and a second protective plate are fixed on the outside of the elastic thick-walled expansion joint. The second protective plate is slidably connected in the spring opened in the first protective plate, and the first protective plate and the second protective plate are connected by a spring, so that when the elastic thick-walled expansion joint is elongated or compressed under the influence of temperature, pressure and other conditions, the first protective plate and the second protective plate can be adjusted in time with the changes of the elastic thick-walled expansion joint, and the spring can promote the contraction of the second protective plate in the spring, thereby realizing the isolation and protection effect between the elastic thick-walled expansion joint and the external working environment, preventing the corrosion of the elastic thick-walled expansion joint, and extending the service life of the elastic thick-walled expansion joint.

[0009] As a preferred embodiment, an elastic thick-walled expansion joint is arranged between the pipe and the first protective plate and the second protective plate. The two ends of the elastic thick-walled expansion joint are fixedly connected to the fixed plate. A first bolt is arranged on the fixed plate fixedly connected to the top end of the pipe. The first bolt fixes the fixed plate fixedly connected to the top end of the pipe with the fixed plate fixedly connected to the bottom end of the adjacent elastic thick-walled expansion joint.

[0010] The technical effect of adopting the above further solution is: connecting two adjacent protective components through the first bolt to better ensure the sealing effect of the thick-walled expansion joint.

[0011] Compared with the prior art, the advantages and positive effects of the present invention lie in that, by setting up a protective component, under normal conditions, the two pairs of first protective plates and the second protective plates are in a closed state, and the first protective plates and the second protective plates are sealed by the second bolt, thereby preventing the elastic thick-walled expansion joint in the protective component from being exposed to the external environment and being corroded. When the elastic thick-walled expansion joint needs to be maintained, the second bolt is unscrewed, the fixed state of the first protective plate and the second protective plate is released, and the first protective plate and the second protective plate are rotated in opposite directions around the first two-way hinge and the second two-way hinge to expose the elastic thick-walled expansion joint inside the protective component, thereby facilitating the maintenance of the elastic thick-walled expansion joint by the staff and extending the life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a structural schematic diagram of the thick-wall expansion joint provided by the utility model.

[0013] Figure 2 This is a working schematic diagram of the thick-wall expansion joint provided by the utility model.

[0014] Figure 3 This is a disassembly diagram of the thick-walled expansion joint protection assembly provided by the utility model.

[0015] Figure 4 This is an internal diagram of the thick-walled expansion joint protection assembly provided by the utility model.

[0016] Legend: 1. Pipe; 2. Fixing plate; 3. Elastic thick-wall expansion joint; 4. First bolt; 5. Protective assembly; 51. First protective plate; 52. Second protective plate; 53. Second bolt; 54. Fixing block; 55. First two-way hinge; 56. Second two-way hinge; 57. Spring; 58. Slide groove. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] like Figure 1 - Figure 4As shown, this embodiment provides a thick-walled expansion joint, including a pipe 1, a fixed plate 2 is fixedly connected to the pipe 1, a protective assembly 5 is provided on the fixed plate 2, the protective assembly 5 includes a first two-way hinge 55, and the first two-way hinge 55 is movably connected at both ends with a first protective plate 51 of the same size, the protective assembly 5 also includes a second two-way hinge 56, and the second two-way hinge 56 is movably connected at both ends with a second protective plate 52 of the same size, a slide groove 58 is provided in the first protective plate 51, and the second protective plate 52 is movably connected in the slide groove 58, and the first protective plate 51 and the second protective plate 52 are fixedly connected to a fixed block 54 at one end away from the first two-way hinge 55. Under normal conditions, the two pairs of The first protective plate 51 and the second protective plate 52 are in a closed state, and the first protective plate 51 and the second protective plate 52 are sealed by the second bolt 53 to prevent the elastic thick-walled expansion joint 3 in the protective component 5 from being exposed to the external environment and corroded. When the elastic thick-walled expansion joint 3 needs to be maintained, the second bolt 53 is unscrewed to release the fixed state of the first protective plate 51 and the second protective plate 52, and the first protective plate 51 and the second protective plate 52 are rotated in opposite directions around the first two-way hinge 55 and the second two-way hinge 56 to expose the elastic thick-walled expansion joint 3 inside the protective component 5, so as to facilitate the maintenance of the elastic thick-walled expansion joint 3 by the staff and extend the life of the equipment.

[0019] Furthermore, if Figure 3 As shown, the fixing block 54 fixes the two symmetrically arranged first protective plates 51 and second protective plates 52 together through the second bolt 53. The top of the second protective plate 52 is fixedly connected with a spring 57. The end of the spring 57 away from the second protective plate 52 is fixedly connected to the first protective plate 51. The pipeline 1 will be corroded to varying degrees in different working environments for a long time. When the staff installs the elastic thick-walled expansion joint 3, the first protective plate 51 and the second protective plate 52 are fixedly arranged on the outside of the elastic thick-walled expansion joint 3. The second protective plate 52 is opened in the first protective plate 51. The first protective plate 51 and the second protective plate 52 are connected by the spring 57, so that when the elastic thick-walled expansion joint 3 is extended or compressed under the influence of temperature, pressure and other conditions, the first protective plate 51 and the second protective plate 52 can be adjusted in time with the changes of the elastic thick-walled expansion joint 3. The spring 57 can promote the contraction of the second protective plate 52 in the spring 57, thereby realizing the isolation and protection of the elastic thick-walled expansion joint 3 from the external working environment, preventing the corrosion of the elastic thick-walled expansion joint 3, and extending the service life of the elastic thick-walled expansion joint 3.

[0020] The above solution still has the problem of how to achieve the protection effect of the thick-wall expansion joint on the entire pipeline 1, such as Figure 1 - Figure 3As shown: In this solution, an elastic thick-walled expansion joint 3 is arranged between the pipeline 1 and the first protective plate 51 and the second protective plate 52. The two ends of the elastic thick-walled expansion joint 3 are fixedly connected to the fixed plate 2. A first bolt 4 is provided on the fixed plate 2 fixedly connected to the top of the pipeline 1. The first bolt 4 fixes the fixed plate 2 fixedly connected to the top of the pipeline 1 and the fixed plate 2 fixedly connected to the bottom end of the adjacent elastic thick-walled expansion joint 3. The two adjacent protective components 5 are connected by the first bolt 4 to better ensure the sealing effect of the thick-walled expansion joint.

[0021] Working principle: Figure 1-4 As shown, when in use, the pipeline 1 will be subject to different degrees of corrosion in different working environments for a long time. When the staff installs the elastic thick-walled expansion joint 3, a first protective plate 51 and a second protective plate 52 are fixedly provided on the outside of the elastic thick-walled expansion joint 3. The second protective plate 52 is slidably connected in the spring 57 opened in the first protective plate 51, and the first protective plate 51 and the second protective plate 52 are connected by the spring 57, so that when the elastic thick-walled expansion joint 3 is extended or compressed under the influence of temperature, pressure and other conditions, the first protective plate 51 and the second protective plate 52 can be adjusted in time with the changes of the elastic thick-walled expansion joint 3, and the spring 57 can be adjusted in time with the changes of the elastic thick-walled expansion joint 3. Promote the contraction of the second protective plate 52 in the spring 57, realize the isolation and protection effect of the elastic thick-walled expansion joint 3 and the external working environment, prevent the corrosion of the elastic thick-walled expansion joint 3, and extend the service life of the elastic thick-walled expansion joint 3. When the elastic thick-walled expansion joint 3 needs to be maintained, unscrew the second bolt 53, release the fixed state of the first protective plate 51 and the second protective plate 52, and rotate the first protective plate 51 and the second protective plate 52 in opposite directions around the first two-way hinge 55 and the second two-way hinge 56 to expose the elastic thick-walled expansion joint 3 inside the protective component 5, so as to facilitate the maintenance of the elastic thick-walled expansion joint 3 by the staff and extend the life of the equipment.

[0022] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any other form. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes for application in other fields. However, any simple modification, equivalent change and modification of the above embodiment made according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A thick-walled expansion joint comprising a pipe (1), characterized in that: A fixed plate (2) is fixedly connected to the pipe (1), and a protective assembly (5) is provided on the fixed plate (2). The protective assembly (5) comprises a first bidirectional hinge (55), and both ends of the first bidirectional hinge (55) are movably connected to first protective plates (51) of the same size. The protective assembly (5) further comprises a second bidirectional hinge (56), and both ends of the second bidirectional hinge (56) are movably connected to second protective plates (52) of the same size.

2. The thick-wall expansion joint according to claim 1, characterized in that: A sliding groove (58) is provided in the first protective plate (51), and the second protective plate (52) is movably connected in the sliding groove (58). The first protective plate (51) and the second protective plate (52) are fixedly connected with a fixed block (54) at one end away from the first two-way hinge (55).

3. The thick-wall expansion joint according to claim 2, characterized in that: The fixing block (54) fixes and connects the two symmetrically arranged first protection plates (51) and the second protection plates (52) via a second bolt (53).

4. The thick-wall expansion joint according to claim 2, characterized in that: A spring (57) is fixedly connected to the top of the second protective plate (52), and one end of the spring (57) away from the second protective plate (52) is fixedly connected to the first protective plate (51).

5. The thick-wall expansion joint according to claim 4, characterized in that: An elastic thick-wall expansion joint (3) is provided between the pipeline (1) and the first protective plate (51) and the second protective plate (52), and both ends of the elastic thick-wall expansion joint (3) are fixedly connected to the fixing plate (2).

6. The thick-wall expansion joint according to claim 1, characterized in that: A first bolt (4) is provided on the fixing plate (2) fixedly connected to the top end of the pipeline (1), and the first bolt (4) fixedly connects the fixing plate (2) fixedly connected to the top end of the pipeline (1) to the fixing plate (2) fixedly connected to the bottom end of the adjacent elastic thick-wall expansion joint (3).

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