Non-metallic compensators for pipeline repair

Abstract

This utility model belongs to the field of pipeline equipment, and particularly relates to a non-metallic compensator for pipeline repair. It includes a skin and connecting discs at both ends of the skin. The end of the connecting disc furthest from the skin has a sleeve for fitting onto the pipe to be repaired. A connecting ring is also fitted outside the skin. An adjusting column is provided on the side wall of the connecting ring, and the adjusting column has a through hole extending through the adjusting column along the axial direction of the connecting ring. An adjusting block is provided inside the through hole. A limiting rod is provided between the adjusting block and the connecting disc, with its two ends hinged to the connecting disc and the adjusting block, respectively. This utility model, by adding a connecting ring between the two connecting discs and replacing the traditional single screw with two screws, and utilizing the hinged structure, allows for adjustable angle between the two connecting discs, thus meeting the needs of pipeline repair with small offset angles in cases of pipeline damage such as uneven foundation settlement and equipment displacement.

Description

Technical Field

[0001] This utility model belongs to the field of pipeline equipment, and in particular relates to a non-metallic compensator for pipeline repair. Background Technology

[0002] Pipeline compensators, also known as expansion joints, are key components in piping systems. They are flexible elements that effectively compensate for axial deformation. For example, expansion joints welded to the shell of a fixed tubesheet heat exchanger have high axial flexibility and are easily deformable. They can compensate for the thermal expansion difference between the tubes and the shell due to different wall temperatures, reducing their axial load and thus decreasing the thermal stress on the tubes, tubesheet, and shell, preventing strength failure, instability failure, and tube pull-out failure. There are many types of expansion joints, commonly including corrugated, welded ring plate, and clamp-type structures. Corrugated expansion joints are the most widely used, while welded ring plate expansion joints are only suitable for normal or low-pressure applications. Expansion joints are also commonly called compensators or expansion joints. They consist of a bellows (an elastic element) that forms the main working body, and accessories such as end pipes, supports, flanges, and guide pipes. Expansion joints are flexible structures installed on container shells or pipelines to compensate for additional stress caused by temperature differences and mechanical vibrations. Expansion joints utilize the effective expansion and contraction of their main working element, the bellows, to absorb dimensional changes in pipelines, ducts, and containers caused by thermal expansion and contraction, or to compensate for axial, lateral, and angular displacements. They can also be used for noise reduction and vibration damping, and in heating systems. To prevent pipeline deformation or damage due to thermal expansion or temperature stress during heating, compensators are installed on the pipeline to compensate for thermal expansion, thereby reducing stress on the pipe wall and the forces acting on valves or support structures. As a freely expandable elastic compensating element, expansion joints offer advantages such as reliable operation, good performance, and compact structure, and are widely used in chemical, metallurgical, and nuclear energy sectors.

[0003] Existing pipe expansion joints mainly consist of a skin and connecting discs at both ends of the skin. The skin is the main expansion joint component of the non-metallic expansion joint, and is made of multiple layers of high-performance silicone rubber or high-silica polytetrafluoroethylene and alkali-free glass wool. It is a high-strength sealing composite material whose function is to absorb expansion and prevent air leakage and rainwater seepage. To ensure the stability of the entire expansion joint structure, the two connecting discs are fixed together by bolts and nuts.

[0004] While the aforementioned structure can provide elastic compensation, in actual use, uneven foundation settlement, equipment displacement, and other factors can cause pipeline displacement and damage. The support structure of the screw and nut limits the compensator from achieving a certain angle of displacement, thus making it impossible to repair such pipeline conditions. Utility Model Content

[0005] This invention addresses the inability of existing compensators to repair pipeline damage caused by uneven foundation settlement, equipment displacement, and other reasons. It proposes a non-metallic compensator that is reasonably designed, simple in structure, easy to manufacture, and capable of meeting the requirements for small-range displacement.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: This utility model provides a non-metallic compensator for pipeline repair, including a skin and connecting discs disposed at both ends of the skin. A sleeve for fitting onto the pipe to be repaired is provided at the end of the connecting disc furthest from the skin. A connecting ring is also fitted outside the skin. An adjusting column is provided on the side wall of the connecting ring. The adjusting column has a through hole that extends through the adjusting column along the axial direction of the connecting ring. An adjusting block is disposed within the through hole. A limiting rod is provided between the adjusting block and the connecting disc. The two ends of the limiting rod are hinged to the connecting disc and the adjusting block, respectively. Connecting columns are provided at the upper and lower ends of the adjusting block. A blind hole for inserting the connecting column is provided on the adjusting column. An adjusting spring is disposed between the connecting column and the adjusting column, and the adjusting spring is fitted into the blind hole.

[0007] Preferably, the inner or outer wall of the sleeve is provided with adhesive threads.

[0008] Preferably, the connecting plate is provided with a connecting ear, the connecting ear is provided with a U-shaped hole in the middle, a hinge block is provided in the U-shaped hole, the hinge block is rotatably disposed in the U-shaped hole, the hinge block is provided with a connecting hole in the middle, and the limiting rod is provided through the connecting hole.

[0009] Preferably, the limiting rod is threaded with a connecting nut, which is located at both ends of the connecting hole.

[0010] Preferably, the connecting nut at the end of the limiting rod extending out of the connecting hole is spaced apart from the hinge block.

[0011] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0012] This utility model provides a non-metallic compensator for pipeline repair. By adding a connecting ring between two connecting discs and replacing the traditional single screw with two screws, and by utilizing a hinged structure, the angle between the two connecting discs can be adjusted. This satisfies the need for pipeline repair with a small offset angle in cases of pipeline damage such as uneven foundation settlement and equipment displacement. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of the non-metallic compensator for pipeline repair provided in Example 1;

[0015] Figure 2 A top view of the non-metallic compensator for pipeline repair provided in Example 1;

[0016] Figure 3 This is a half-sectional view of the connecting ring portion structure provided in Example 1;

[0017] In the above figures, 1. Skin; 2. Connecting disc; 21. Tube sleeve; 211. Adhesive thread; 22. Connecting lug; 221. U-shaped hole; 3. Hinge block; 31. Rotating shaft; 4. Connecting ring; 41. Adjusting post; 411. Through hole; 412. Blind hole; 5. Adjusting block; 51. Connecting post; 52. Hinge lug; 6. Adjusting spring; 7. Limiting rod; 8. Connecting nut. Detailed Implementation

[0018] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0019] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0020] Example 1, as Figures 1-3 As shown, this embodiment aims to provide a non-metallic compensator suitable for repairing pipelines with small angles (less than 20 degrees) under pipeline damage caused by uneven foundation settlement, equipment displacement, etc. To achieve the above objective, the non-metallic compensator for pipeline repair provided in this embodiment includes a skin 1 and connecting plates 2 disposed at both ends of the skin 1. The above structure consists of common components and connection relationships of existing compensators, and therefore will not be described in detail in this embodiment.

[0021] To facilitate pipe repair, in this embodiment, a sleeve 21 is provided at the end of the connecting plate 2 away from the skin 1 for fitting onto the pipe to be repaired. The sleeve 21 is used to fit over or insert into the pipe to be repaired, and then the sleeve is fixed to the pipe by adhesive. Since adhesive is used for fixing, the sleeve needs to be made of a non-metallic material; in this embodiment, plastic, more specifically PVC, is selected.

[0022] Considering the damage to pipelines caused by uneven foundation settlement and equipment displacement, which is essentially a case of the original straight pipeline being twisted and broken, after sawing off both ends of the opening, the axes of the two openings are not on the same straight line. Therefore, the traditional method of fixing the connecting plate 2 with screws and nuts is not feasible. However, the connecting plates 2 still need to maintain a certain degree of stability. Therefore, in this embodiment, a connecting ring 4 is also fitted outside the skin 1. The inner diameter of the connecting ring 4 is larger than the outer diameter of the skin 1. Adjusting columns 41 are also provided on the side wall of the connecting ring 4. The adjusting columns 41 are evenly distributed on the side wall of the connecting ring 4. In this embodiment, a total of 2 adjusting columns 41 are provided, and the included angle between adjacent adjusting columns 41 is 180°.

[0023] To achieve connection with the connecting plate 2, a through hole 411 is provided on the adjusting column 41, extending through the adjusting column 41 along the axial direction of the connecting ring 4. An adjusting block 5 is provided inside the through hole 411. The adjusting block 5 is generally square in shape. A limit rod 7 is provided between the adjusting block 5 and the connecting plate 2. The two ends of the limit rod 7 are hinged to the connecting plate 2 and the adjusting block 5, respectively. Specifically, adjusting ears 52 are provided at both ends of the adjusting block 5. The adjusting ears 52 are two spaced plates. A rotating shaft passes through the end of the limit rod 7. Holes are made in the plates for installing the rotating shaft. Of course, the rotating shaft is fixedly connected to the limit rod 7. In this way, the connection is achieved. The limiting rod 7 rotates on the rotating shaft. A connecting ear 22 is provided on the connecting plate 2, and the connecting ear 22 is also oriented in a specific direction. A U-shaped hole 221 is provided in the middle of the connecting ear 22, extending through the front, back, and top of the connecting ear 22. A hinge block 3 is provided inside the U-shaped hole 221. The hinge block 3 is also a square block and is rotatably mounted within the U-shaped hole 221. Specifically, rotating shafts 31 are provided at both ends of the hinge block 3, and the rotating shafts 31 are rotatably mounted on the connecting ear 22, thus enabling the rotation of the hinge block 3. Simultaneously, a connecting hole is provided in the middle of the hinge block 3, through which the limiting rod 7 passes. In this embodiment, the end of the limiting rod 7 near the hinge block 3 is threaded, and a connecting nut 8 is threaded onto the limiting rod 7. The connecting nuts 8 are located at both ends of the connecting hole. Thus, by providing connecting nuts 8 at both ends, the distance of the limiting rod 7 is limited.

[0024] Considering that the two connecting discs 2 are not aligned on the same axis, the angle of the limiting rod 7 needs to change. Therefore, the connecting nut 8 extending from the connecting hole of the limiting rod 7 is spaced apart from the hinge block 3. In this way, the two connecting nuts 8 are not tightly attached to the hinge block 3, which provides a margin for angle change, thereby realizing the angle change.

[0025] To better adjust the angle, in this embodiment, connecting posts are provided at both the upper and lower ends of the adjusting block 5. A blind hole 412 for inserting the connecting post is provided on the adjusting post 41. An adjusting spring 6 is provided between the connecting post and the adjusting post 41, and the adjusting spring 6 is fitted into the blind hole 412. Since adjusting springs 6 are provided at both the upper and lower ends, the adjusting block 5 remains stationary when the two connecting discs 2 are horizontal. When the connecting discs 2 are installed, the angle between the two connecting discs 2 changes. At this time, the adjusting spring 6 can be compressed or stretched to keep the connecting ring 4 stationary, thus minimizing pressure on the skin 1 from the connecting ring 4.

[0026] To improve the bonding effect, bonding threads 211 are provided on the inner or outer wall of the sleeve 21. In this embodiment, bonding threads 211 are provided on the outer wall to increase friction and improve the bonding effect.

[0027] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A non-metallic compensator for pipeline repair, comprising a skin and a connecting disc provided at both ends of the skin, characterized in that, The end of the connecting plate away from the skin is provided with a sleeve for fitting onto the tube to be repaired. A connecting ring is also fitted outside the skin. An adjusting post is provided on the side wall of the connecting ring. The adjusting post has a through hole that extends through the adjusting post along the axial direction of the connecting ring. An adjusting block is provided inside the through hole. A limit rod is provided between the adjusting block and the connecting plate. The two ends of the limit rod are respectively hinged to the connecting plate and the adjusting block. Connecting posts are provided at the upper and lower ends of the adjusting block. A blind hole is provided on the adjusting post for inserting the connecting post. An adjusting spring is provided between the connecting post and the adjusting post, and the adjusting spring is fitted into the blind hole.

2. The non-metallic compensator for track repair according to claim 1, characterized in that, The inner or outer wall of the sleeve is provided with adhesive threads.

3. The non-metallic compensator for track repair according to claim 2, characterized in that, The connecting plate is provided with a connecting ear, and a U-shaped hole is provided in the middle of the connecting ear. A hinge block is provided in the U-shaped hole. The hinge block is rotatably disposed in the U-shaped hole. A connecting hole is provided in the middle of the hinge block. The limiting rod passes through the connecting hole.

4. The non-metallic compensator for track repair according to claim 3, characterized in that, The limiting rod is threaded with a connecting nut, which is located at both ends of the connecting hole.

5. The non-metallic compensator for track repair according to claim 4, characterized in that, The connecting nut at the end of the limiting rod extending out of the connecting hole is spaced apart from the hinge block.

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