Leak-proof chemical pipeline connecting structure

Abstract

This utility model relates to the technical field of chemical pipeline connection structures, specifically disclosing a leak-proof chemical pipeline connection structure, including a first pipe body and a fourth clamping sleeve. The first pipe body has a first clamping sleeve at its front end and a second clamping sleeve at its rear end. The first clamping sleeve and the second clamping sleeve are fixedly connected by bolts. The first pipe body has a first protective inner sleeve inside, and the inner wall of the first protective inner sleeve has a first clamping groove. The mechanical interlocking structure of the first limiting sleeve and the second limiting sleeve with the locking element replaces the traditional flange bolt connection, eliminating the risk of bolt stress relaxation and gasket creep failure. The multi-point interlocking design of the clamping sleeve with the first clamping groove and the second clamping groove reduces the possibility of leakage when the traditional flange is pried open. The double-layer buffer structure of the first protective inner sleeve and the second protective inner sleeve absorbs pipeline vibration and thermal expansion and contraction stress, reducing interface fretting wear.

Description

Technical Field

[0001] This utility model relates to the technical field of chemical pipeline connection structures, specifically a leak-proof chemical pipeline connection structure. Background Technology

[0002] Pipeline connection structures are core components ensuring the safe and efficient transmission of fluids. Their design must comprehensively consider material compatibility, sealing reliability, and ease of operation. Welded connections that achieve permanent seals through high-temperature fusion require strict control of the welding process to avoid defects. Flange connections that use bolt preload to compress gaskets to form a seal are suitable for scenarios requiring frequent disassembly and inspection, but gasket aging needs to be checked regularly. Compression fitting connections using a double compression structure achieve sealing through mechanical compression and have strong vibration resistance. In addition, the design of pipeline connection structures must also consider factors such as ease of installation and maintenance, durability of sealing performance, and cost-effectiveness to ensure the high efficiency and safety of chemical production.

[0003] When existing chemical leak-proof pipelines are assembled and used, they mostly rely on connecting flanges on both sides for assembly. However, in areas with excessive load-bearing capacity, such as intermediate support points of long-distance horizontal pipelines or connections between pipelines and heavy equipment, traditional flange connections are used. These flanges are fixed with multiple screws, which can easily loosen over time. Additionally, the rubber rings or sealing sheets in the middle can be flattened and lose elasticity, leading to pipeline leaks. Pressure within the pipeline can push the two flange joints outwards, creating gaps. Pipeline vibration or thermal expansion and contraction can continuously rub and pull on the joints, damaging the sealing surface and easily creating gaps that lead to leaks. Furthermore, the pipeline contains filters to filter impurities from the liquid flowing through it. Cleaning and replacing these filters requires disassembling the pipeline. Each disassembly involves mechanical scraping of the sealing surface, and the repeated tightening of the flanges and gaskets through bolt connections can cause permanent interlayer collapse, making the pipeline connections prone to leaks. Utility Model Content

[0004] The purpose of this utility model is to provide a leak-proof chemical pipeline connection structure to solve the problems mentioned in the background art, such as leakage caused by loose bolts, gasket aging and failure, damage to the sealing surface during disassembly and maintenance, and easy deformation and leakage of load-bearing parts.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a leak-proof chemical pipeline connection structure, comprising: a first pipe body and a fourth clamping sleeve, wherein a first clamping sleeve is provided at the front end of the first pipe body, a second clamping sleeve is provided at the rear end of the first pipe body, the first clamping sleeve and the second clamping sleeve are fixedly connected by bolts, and a first protective inner sleeve is provided inside the first pipe body, and a first clamping groove is provided on the inner wall of the first protective inner sleeve.

[0006] It also includes a first limiting sleeve, a second limiting sleeve, and a locking component. The outer walls of the first and second limiting sleeves are fixedly connected to a third snap-fit ​​sleeve, and the inner wall of the third snap-fit ​​sleeve is fixedly connected to a third limiting sleeve. The inner wall of the third limiting sleeve is provided with multiple second snap-fit ​​grooves, and a filter plate is snap-fitted into the inside of the second snap-fit ​​grooves. The outer wall of one side of the filter plate is provided with multiple filter holes. The first limiting sleeve and the second limiting sleeve are fixedly engaged by the locking component.

[0007] The outer walls on both sides of the first tube are provided with second snap-fit ​​components, and the inner walls on both sides of the second snap-fit ​​components are fitted with third tubes.

[0008] The fourth snap-fit ​​sleeve has a second protective inner sleeve inside, and the second protective inner sleeve has a second pipe body inside, and a first connecting flange is fixedly connected to the outer wall of one side of the second pipe body.

[0009] The second limiting sleeve and the first limiting sleeve are made of high-strength and tough special steel.

[0010] The filter plate is made of 316L stainless steel.

[0011] The second snap-fit ​​component is engaged with the first tube body through the first snap-fit ​​groove.

[0012] The upper end of the fourth clamping sleeve is fixedly connected to the second connecting flange, and the side of the fourth clamping sleeve away from the first connecting flange is fixedly connected to the third connecting flange.

[0013] This utility model has at least the following beneficial effects:

[0014] The mechanical interlocking structure of the first and second limiting sleeves and locking components replaces the traditional flange bolt connection, eliminating the risk of bolt stress relaxation and gasket creep failure, thus significantly improving sealing reliability. The multi-point engagement design of the snap-fit ​​sleeve with the first and second snap-fit ​​grooves can suppress the separation of the sealing surface under the impact of internal pipeline pressure, reducing the leakage caused by the expansion of traditional flanges. The double-layer buffer structure of the first and second protective inner sleeves absorbs pipeline vibration and thermal expansion and contraction stress, reducing interface fretting wear. The snap-fit ​​component is flexibly connected to the pipe body, avoiding sealing surface misalignment caused by thermal mismatch of rigid flanges. The filter maintenance convenience is greatly improved. The pluggable filter plate can be installed independently through the second snap-fit ​​groove. When replacing the filter screen, there is no need to disassemble the main pipe body, reducing sealing surface damage caused by frequent disassembly and assembly. The filter plate and the limiting sleeve adopt a snap-fit ​​seal, avoiding permanent deformation of the gasket caused by the compression of traditional flanges. A composite structure of the third snap-fit ​​sleeve and the first, second and third connecting flanges is set at the key load-bearing points of the pipeline to disperse mechanical load and thermal stress, preventing deformation and leakage of the interface due to gravity accumulation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is an exploded view of the third snap-fit ​​sleeve and the first tube body in this utility model;

[0017] Figure 3 This is an exploded view of the third tube in this utility model;

[0018] Figure 4 This is an exploded view of the second snap-fit ​​assembly in this utility model;

[0019] Figure 5 This is a front view of the structure of this utility model.

[0020] In the diagram: 1. First pipe body; 2. First snap-fit ​​sleeve; 3. Second snap-fit ​​sleeve; 4. First protective inner sleeve; 5. First snap-fit ​​groove; 6. First limiting sleeve; 7. Second limiting sleeve; 8. Third snap-fit ​​sleeve; 9. Locking element; 10. Third limiting sleeve; 11. Second snap-fit ​​groove; 12. Filter plate; 13. Filter hole; 14. Fourth snap-fit ​​sleeve; 15. Second protective inner sleeve; 16. Second pipe body; 17. First connecting flange; 18. Second connecting flange; 19. Third connecting flange; 20. Second snap-fit ​​assembly; 21. Third pipe body. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Example 1

[0023] Please see Figures 1 to 5 This utility model provides a technical solution: a leak-proof chemical pipeline connection structure, including: a first pipe body 1 and a fourth clamping sleeve 14, a first clamping sleeve 2 is provided at the front end of the first pipe body 1, a second clamping sleeve 3 is provided at the rear end of the first pipe body 1, the first clamping sleeve 2 and the second clamping sleeve 3 are fixedly connected by bolts, a first protective inner sleeve 4 is provided inside the first pipe body 1, and a first clamping groove 5 is opened on the inner wall of the first protective inner sleeve 4;

[0024] It also includes a first limiting sleeve 6, a second limiting sleeve 7, and a locking element 9. The locking element 9 is composed of bolts, buckles, sleeves, and threaded holes. The buckle is snapped into the sleeve, and then the bolt is screwed into the threaded hole to fix the buckle and sleeve. A third snap-fit ​​sleeve 8 is fixedly connected to the outer wall of one side of the first limiting sleeve 6 and the second limiting sleeve 7. A third limiting sleeve 10 is fixedly connected to the inner wall of the third snap-fit ​​sleeve 8. The inner wall of the third limiting sleeve 10 has multiple second snap-fit ​​grooves 11. A filter plate 12 is snap-fitted into the inside of the second snap-fit ​​grooves 11. A multiple filter holes 13 are opened on the outer wall of one side of the filter plate 12. The first limiting sleeve 6 and the second limiting sleeve 7 are fixedly engaged by the locking element 9. The first protective inner sleeve 4 and the second protective inner sleeve 15 are connected by a ladder. To buffer vibration and thermal stress, the flexible connection of the second snap-fit ​​assembly 20 compensates for installation deviations. The load-bearing parts adopt a composite frame of the third snap-fit ​​sleeve 14, the first connecting flange 17, the second connecting flange 18, and the third connecting flange 19 to distribute the load to the pipe wall and external support, thereby reducing leakage of traditional flanges under dynamic loads. The first limiting sleeve 6 and the second limiting sleeve 7 are rigidly locked by the locking element 9, forcing the third snap-fit ​​sleeve 8 to form a multi-point meshing sealing band with the first snap-fit ​​groove 5 on the pipe body, converting the internal pressure of the pipeline into the lateral shear resistance of the sealing surface, reducing leakage caused by bolt loosening and gasket failure. The pluggable filter plate 12 is integrated into the second snap-fit ​​groove 11. When replacing, only the partial locking element is released to avoid damage to the sealing interface by overall disassembly.

[0025] Example 2

[0026] The outer walls on both sides of the first pipe body 1 are provided with second snap-fit ​​components 20, and the inner walls on both sides of the second snap-fit ​​components 20 are fitted with third pipe bodies 21. Through the mechanical interlocking structure, the traditional flange bolt connection is replaced, eliminating the risk of bolt stress relaxation and gasket creep failure.

[0027] The fourth clamp sleeve 14 is provided with a second protective inner sleeve 15, and the second protective inner sleeve 15 is provided with a second pipe body 16. The outer wall of one side of the second pipe body 16 is fixedly connected to a first connecting flange 17. The second protective inner sleeve 15 is provided to reduce the corrosion of the pipeline by chemical products.

[0028] The second limiting sleeve 7 and the first limiting sleeve 6 are made of high-strength and tough special steel. High-strength and tough special steel has high toughness, good plasticity, and high resistance strength.

[0029] The filter plate 12 is made of 316L stainless steel. 316L stainless steel has strong corrosion resistance, which reduces the corrosion caused by chemical products.

[0030] The second snap-fit ​​assembly 20 is snapped into the first pipe body 1 through the first snap-fit ​​groove 5. Through the snap-fit ​​engagement, the snap-fit ​​assembly and the pipe body are flexibly connected, avoiding misalignment of the sealing surface caused by thermal mismatch of the rigid flange.

[0031] The upper end of the fourth clamp sleeve 14 is fixedly connected to the second connecting flange 18, and the side of the fourth clamp sleeve 14 away from the first connecting flange 17 is fixedly connected to the third connecting flange 19. By providing multiple connecting flanges, it is easy to integrate with other pipeline lines.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0033] Although embodiments of the present invention 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 to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A leak-proof chemical pipeline connection structure, comprising: The first tube body and the fourth snap-fit ​​sleeve, the front end of the first tube body is provided with a first snap-fit ​​sleeve, the rear end of the first tube body is provided with a second snap-fit ​​sleeve, the first snap-fit ​​sleeve and the second snap-fit ​​sleeve are fixedly connected by bolts, the inside of the first tube body is provided with a first protective inner sleeve, and the inner wall of the first protective inner sleeve is provided with a first snap-fit ​​groove. The feature is that it further includes a first limiting sleeve, a second limiting sleeve, and a locking member. The outer walls of the first limiting sleeve and the second limiting sleeve are fixedly connected to a third snap-fit ​​sleeve on one side. The inner wall of the third snap-fit ​​sleeve is fixedly connected to a third limiting sleeve. The inner wall of the third limiting sleeve is provided with a plurality of second snap-fit ​​grooves. A filter plate is snap-fitted into the interior of the second snap-fit ​​grooves. The outer wall of one side of the filter plate is provided with a plurality of filter holes. The first limiting sleeve and the second limiting sleeve are fixedly engaged by the locking member.

2. The leak-proof chemical pipeline connection structure according to claim 1, characterized in that: The outer walls on both sides of the first tube are provided with second snap-fit ​​components, and the inner walls on both sides of the second snap-fit ​​components are fitted with third tubes.

3. The leak-proof chemical pipeline connection structure according to claim 2, characterized in that: The fourth snap-fit ​​sleeve is provided with a second protective inner sleeve, and the second protective inner sleeve is provided with a second pipe body, and a first connecting flange is fixedly connected to the outer wall of one side of the second pipe body.

4. The leak-proof chemical pipeline connection structure according to claim 1, characterized in that: The second limiting sleeve and the first limiting sleeve are made of high-strength and tough special steel.

5. The leak-proof chemical pipeline connection structure according to claim 1, characterized in that: The filter plate is made of 316L stainless steel.

6. The leak-proof chemical pipeline connection structure according to claim 2, characterized in that: The second snap-fit ​​component is snapped into the first tube body through the first snap-fit ​​groove.

7. The leak-proof chemical pipeline connection structure according to claim 3, characterized in that: The upper end of the fourth snap-fit ​​sleeve is fixedly connected to a second connecting flange, and the side of the fourth snap-fit ​​sleeve away from the first connecting flange is fixedly connected to a third connecting flange.

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