A displacement compensation and sealing structure for a vacuum duct

Abstract

This invention provides a displacement compensation and sealing structure for vacuum pipelines, comprising: a connecting ring plate, which is installed on the vacuum pipeline on both sides of a thermal expansion joint; a compensation sealing element, which is installed inside the connecting ring plate and sleeved on the outside of the thermal expansion joint; the compensation sealing element includes a compensation part and a connecting sealing part, the connecting sealing part being disposed at both ends of the compensation part, the compensation part being arched or arc-shaped, and the compensation part protruding towards the side away from the thermal expansion joint. The displacement compensation and sealing structure for vacuum pipelines described in this invention has the following advantages: 1. It can be better used for displacement compensation of rectangular pipelines and other irregularly shaped pipelines; 2. It can better ensure pipeline displacement compensation and vacuum sealing performance under vacuum conditions; 3. The structure is simple and easy to install, inspect, maintain, and replace.

Description

Technical Field

[0001] This invention relates to the field of vacuum pipelines, and more specifically, to a displacement compensation and sealing structure for vacuum pipelines. Background Technology

[0002] Vacuum pipes expand and contract with temperature changes in the external environment, requiring compensation measures.

[0003] Due to their superior compensation capabilities, metal bellows are widely used as compensating sealing elements in vacuum and pressure pipelines. However, the integral forming method is primarily suitable for circular pipes. For rectangular and other irregularly shaped pipes, splicing processes are required, making it difficult to guarantee performance. Furthermore, the primary method of connecting bellows is welding, which makes installation difficult in high-risk environments such as hot work, and also increases the difficulty of inspection, maintenance, and replacement after a malfunction.

[0004] Existing technology, patent application number CN202211375811.0, discloses a telescopic device for a vacuum pipeline, comprising: an arc-shaped ring plate, a support ring, and a support cylinder; the arc-shaped ring plate circumferentially surrounds the outside of the thermal expansion joint between two sections of vacuum pipeline, with a first end fixedly connected to the outer surface of the first section of vacuum pipeline and a second end fixedly connected to the outer surface of the second section of vacuum pipeline; the support cylinder circumferentially surrounds above the thermal expansion joint and is located inside the arc-shaped ring plate, with one end fixedly connected to the first section of vacuum pipeline and a first gap provided between the other end and the second section of vacuum pipeline; the support ring is arranged around above the support cylinder, with its top fixedly connected to the arc-shaped ring plate and a second gap provided between its bottom and the outer surface of the support cylinder. Although this patent can be applied to vacuum pipelines with rectangular or other irregular shapes, the sealing performance of this displacement compensation device is poor and it is inconvenient to install and maintain.

[0005] In view of this, the present invention is hereby proposed. Summary of the Invention

[0006] The purpose of this invention is to propose a displacement compensation and sealing structure for vacuum pipelines, so as to solve the problems of poor sealing performance and inconvenience of installation and maintenance of displacement compensation devices in the prior art.

[0007] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0008] A displacement compensation and sealing structure for a vacuum pipeline, the displacement compensation and sealing structure for the vacuum pipeline comprising:

[0009] A connecting ring plate is installed on the vacuum pipes on both sides of the thermal expansion joint;

[0010] A compensating sealing element is installed inside the connecting ring plate and is sleeved on the outside of the thermal expansion joint;

[0011] The compensating sealing element includes a compensating part and a connecting sealing part. The connecting sealing part is disposed at both ends of the compensating part. The compensating part is arched or arc-shaped and protrudes towards the side away from the thermal expansion joint.

[0012] The displacement compensation and sealing structure for vacuum pipelines described in this invention has the following advantages: 1. It can be better used for displacement compensation of circular pipelines, rectangular pipelines, and other irregularly shaped pipelines; 2. It can better ensure pipeline displacement compensation and vacuum sealing performance under vacuum conditions; 3. It has a simple structure and is easy to install, inspect, maintain, and replace.

[0013] Furthermore, the angle between the line connecting the midpoint and the endpoint of the compensation unit and the horizontal line is α, and α satisfies: 0° < α < 45°.

[0014] The angle α between the line connecting the midpoint and the endpoint of the compensation section and the horizontal line must satisfy 0° < α < 45° to ensure the vacuum sealing performance of the displacement compensation and sealing structure for vacuum pipelines described in this invention.

[0015] Furthermore, structural sealant is used to connect the connecting sealing part and the connecting ring plate on the side away from the thermal expansion joint.

[0016] This setup is equivalent to using structural sealant on the higher pressure side of the connection between the compensating sealing element and the connecting ring plate. On the one hand, it ensures good connection strength between the compensating sealing element and the connecting ring plate; on the other hand, when the pipeline enters a vacuum environment, the structural sealant can play a certain sealing role, thereby improving the sealing performance of the displacement compensation and sealing structure for vacuum pipelines described in this invention.

[0017] Furthermore, the connecting sealing part is arched or arc-shaped.

[0018] Furthermore, the connecting sealing portion is provided to protrude toward the side close to the compensation portion.

[0019] Furthermore, the angle between the line connecting the midpoint and the end point of the connecting sealing part and the horizontal line is β, and β satisfies: 45° < β < 90°.

[0020] Furthermore, the compensating sealing element is integrally formed or the compensating part and the connecting sealing part are heat-fused together.

[0021] Furthermore, the compensating sealing element is integrally molded.

[0022] The compensating sealing element is integrally molded to avoid splicing and ensure the pipe displacement compensation and vacuum sealing performance of the compensating sealing element.

[0023] Furthermore, the compensating sealing element is made of a non-metallic material.

[0024] Non-metallic materials are inherently dense and have a certain strength, possessing gas-sealing capabilities, which further improves the sealing performance of the displacement compensation and sealing structure for vacuum pipelines described in this invention.

[0025] Furthermore, the connecting ring plate is welded to the vacuum pipe.

[0026] This invention proposes a displacement compensation and sealing structure for vacuum pipelines. Compared with the prior art, the displacement compensation and sealing structure for vacuum pipelines described in this invention has the following advantages:

[0027] 1) The displacement compensation and sealing structure for vacuum pipelines described in this invention can ensure good vacuum sealing and pipeline displacement compensation functions.

[0028] 2) The displacement compensation and sealing structure for vacuum pipelines described in this invention can be better used for displacement compensation of rectangular pipelines and other irregularly shaped pipelines in vacuum pipelines. For pipelines with special shapes, it is easy to achieve good one-piece molding, avoid splicing, and ensure the performance of compensation and sealing elements.

[0029] 3) The displacement compensation and sealing structure for vacuum pipelines described in this invention is easy to install, inspect, maintain and replace, and is especially suitable for occasions where welding is not allowed. Attached Figure Description

[0030] Figure 1 This is one of the structural schematic diagrams of a displacement compensation and sealing structure for a vacuum pipeline according to an embodiment of the present invention;

[0031] Figure 2 This is a second schematic diagram of a displacement compensation and sealing structure for a vacuum pipeline according to an embodiment of the present invention;

[0032] Figure 3 This is a schematic diagram of a compensation sealing element for a displacement compensation and sealing structure of a vacuum pipeline, as described in an embodiment of the present invention.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1. Vacuum pipe; 11. First pipe; 12. Second pipe; 2. Connecting ring plate; 21. First ring plate; 22. Second ring plate; 3. Compensating sealing element; 31. Compensating part; 32. Connecting sealing part; 4. Structural sealant; 100. Thermal expansion joint. Detailed Implementation

[0035] It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of the present invention can be combined with each other. The descriptions of "first," "second," etc., mentioned in the embodiments of the present invention are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0036] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0037] Example 1

[0038] like Figures 1-3 As shown, this embodiment proposes a displacement compensation and sealing structure for vacuum pipelines, which includes:

[0039] Connecting ring plate 2, the connecting ring plate 2 is installed on the vacuum pipes 1 on both sides of the thermal expansion joint 100;

[0040] Compensating sealing element 3 is installed inside the connecting ring plate 2 and is sleeved on the outside of the thermal expansion joint 100;

[0041] The compensating sealing element 3 includes a compensating part 31 and a connecting sealing part 32. The connecting sealing part 32 is disposed at both ends of the compensating part 31. The connecting sealing part 32 of the compensating sealing element 3 is connected to the connecting ring plate 2 by a gas seal. The compensating part 31 is arched or arc-shaped and protrudes towards the side away from the thermal expansion joint 100.

[0042] The displacement compensation and sealing structure for vacuum pipelines described in this invention has two advantages: First, it can be better used for displacement compensation in vacuum pipelines with rectangular or other irregular shapes. Second, it can ensure good pipeline displacement compensation and vacuum sealing performance: when the pipeline shifts due to thermal expansion and contraction, the arched or arc-shaped compensation part 31 can absorb the displacement, thereby achieving pipeline displacement compensation. Figure 2As shown, when a vacuum environment is entered inside the vacuum pipeline 1, the air pressure on the connecting sealing part 32 will cause the connecting sealing part 32 to press against the connecting ring plate 2, thereby ensuring better sealing performance. This allows the connecting sealing part 32 of the compensating sealing element 3 and the connecting ring plate 2 to be connected together via a gas seal. The compensating part 31 is protruding towards the side away from the thermal expansion joint 100, i.e., the compensating sealing element 3 protrudes towards the atmospheric pressure contact side. The air pressure on the compensating part 31 will cause it to press against the vacuum pipeline 1. Simultaneously, the air pressure on the compensating part 31 is mainly borne by the membrane stress. The compensating part 31 converts the air pressure into a thrust on the connecting sealing part 32, further pressing the connecting sealing part 32, thereby ensuring better sealing performance. This facilitates the gas seal connection between the connecting sealing part 32 of the compensating sealing element 3 and the connecting ring plate 2. Thirdly, the displacement compensation and sealing structure for vacuum pipelines described in this invention is simple and easy to install, inspect, maintain, and replace.

[0043] Specifically, such as Figure 1 As shown, a thermal expansion joint 100 exists between the first pipe 11 and the second pipe 12 of the vacuum pipe 1. The connecting ring plate 2 includes a first ring plate 21 and a second ring plate 22. The first ring plate 21 is mounted on the first pipe 11, and the second ring plate 22 is mounted on the second pipe 12. The first ring plate 21 and the first pipe 11 form a 90° angle, and the second ring plate 22 and the second pipe 12 also form a 90° angle. More specifically, the inner side of the first ring plate 21 is welded to the first pipe 11, and the inner side of the second ring plate 22 is welded to the second pipe 12. The outer sides of the first ring plate 21 and the second ring plate 22 are suspended. This arrangement enhances the installation stability and strength of the connecting ring plate 2; it also facilitates the installation of the compensating sealing element 3.

[0044] Specifically, such as Figure 3 As shown, the angle between the line connecting the midpoint and the endpoint of the compensation unit 31 and the horizontal line is α, and α satisfies: 0° < α < 45°.

[0045] The angle α between the line connecting the midpoint and the endpoint of the compensation section 31 and the horizontal line must satisfy 0° < α < 45° to ensure the vacuum sealing performance of the displacement compensation and sealing structure for vacuum pipelines described in this invention.

[0046] Specifically, the connecting sealing part 32 is arched or arc-shaped.

[0047] Specifically, the connecting sealing part 32 is provided to protrude toward the side close to the compensation part 31.

[0048] The connecting sealing part 32 is protruding towards the side close to the compensation part 31. When a vacuum environment is entered into the vacuum pipeline 1, the air pressure on the connecting sealing part 32 will cause the connecting sealing part 32 to press against the connecting ring plate 2, thereby ensuring good sealing performance. In this way, the connecting sealing part 32 of the compensation sealing element 3 and the connecting ring plate 2 are connected together by gas sealing.

[0049] Specifically, the angle between the line connecting the midpoint and the end point of the connecting sealing part 32 and the horizontal line is β, and β satisfies: 45° < β < 90°.

[0050] The angle β between the line connecting the midpoint and the end point of the sealing part 32 and the horizontal line satisfies 45°<β<90°, so that the vacuum sealing performance of the displacement compensation and sealing structure for vacuum pipelines described in this invention can be better realized.

[0051] Specifically, the compensating sealing element 3 is integrally formed or the compensating part 31 and the connecting sealing part 32 are heat-fused together.

[0052] Specifically, the compensating sealing element 3 is integrally molded. This integral molding avoids splicing and ensures the pipe displacement compensation and vacuum sealing performance of the compensating sealing element 3.

[0053] Specifically, the compensating sealing element 3 is made of a non-metallic material. Non-metallic materials are inherently dense and possess a certain strength, exhibiting gas-sealing capabilities, further improving the sealing performance of the displacement compensation and sealing structure for vacuum pipelines described in this invention.

[0054] Specifically, the non-metallic materials mentioned are not specifically limited.

[0055] Preferably, in this embodiment, the compensating sealing element 3 is made of rubber. Rubber material itself is denser and has a stronger gas-sealing ability, greatly improving the sealing performance of the displacement compensation and sealing structure for vacuum pipelines described in this invention.

[0056] Specifically, the connecting ring plate 2 is welded to the vacuum pipe 1. This arrangement ensures that the displacement compensation and sealing structure for vacuum pipes described in this invention has vacuum sealing performance, and also gives the connecting ring plate 2 and vacuum pipe 1 good connection strength.

[0057] During installation, the displacement compensation and sealing structure for vacuum pipelines described in this invention is first connected to the vacuum pipeline 1 by welding or other metallurgical methods; then the compensation and sealing element 3 is fitted onto the outside of the thermal expansion joint 100 of the vacuum pipeline 1, properly fitting with the connecting ring plate 2.

[0058] The displacement compensation and sealing structure for vacuum pipelines described in this invention, with the connecting ring plate 2 and the compensation sealing element 3 interconnected, serves multiple functions: First, it can be better used for displacement compensation in vacuum pipelines with rectangular or other irregular shapes; second, it ensures good pipeline displacement compensation and vacuum sealing performance: when the pipeline shifts due to thermal expansion and contraction, the arched or arc-shaped compensation part 31 can absorb the displacement, thereby achieving pipeline displacement compensation; Figure 2 As shown, when a vacuum environment is entered inside the vacuum pipeline 1, the air pressure on the connecting sealing part 32 will cause the connecting sealing part 32 to press against the connecting ring plate 2, thereby ensuring better sealing performance. This allows the connecting sealing part 32 of the compensating sealing element 3 and the connecting ring plate 2 to be connected together via a gas seal. The compensating part 31 is protruding towards the side away from the thermal expansion joint 100, i.e., the compensating sealing element 3 protrudes towards the atmospheric pressure contact side. The air pressure on the compensating part 31 will cause it to press against the vacuum pipeline 1. Simultaneously, the air pressure on the compensating part 31 is mainly borne by the membrane stress. The compensating part 31 converts the air pressure into a thrust on the connecting sealing part 32, further pressing the connecting sealing part 32, thereby ensuring better sealing performance. This facilitates the gas seal connection between the connecting sealing part 32 of the compensating sealing element 3 and the connecting ring plate 2. Thirdly, the displacement compensation and sealing structure for vacuum pipelines described in this invention is simple and easy to install, inspect, maintain, and replace.

[0059] Example 2

[0060] Unlike Example 1, in this example, specifically, as shown... Figure 2 As shown, structural sealant 4 is used to connect the compensating sealing element 3 and the connecting ring plate 2 on the side away from the thermal expansion joint 100.

[0061] This setup is equivalent to using structural sealant 4 to connect the compensating sealing element 3 and the connecting ring plate 2 on the side with higher pressure. On the one hand, it can ensure that there is a good connection strength between the compensating sealing element 3 and the connecting ring plate 2; on the other hand, when the pipeline enters a vacuum environment, the structural sealant 4 can play a certain sealing role, thereby improving the sealing performance of the displacement compensation and sealing structure for vacuum pipelines described in this invention.

[0062] During installation, the displacement compensation and sealing structure for vacuum pipelines described in this invention is first connected to the vacuum pipeline 1 by welding or other metallurgical methods; then, the compensation sealing element 3 is fitted onto the outside of the thermal expansion joint 100 of the vacuum pipeline 1, properly fitting with the connecting ring plate 2; finally, structural sealant 4 is used to connect the compensation sealing element 3 and the connecting ring plate 2 on the side with higher pressure.

[0063] The displacement compensation and sealing structure for vacuum pipelines described in this invention, with the connecting ring plate 2, compensation sealing element 3, and structural sealant 4 interconnected, serves multiple functions: 1. It can be better used for displacement compensation in vacuum pipelines with rectangular or other irregular shapes; 2. It ensures good pipeline displacement compensation and vacuum sealing performance: when the pipeline shifts due to thermal expansion and contraction, the arched or arc-shaped compensation part 31 can absorb the displacement, thereby achieving pipeline displacement compensation; Figure 2 As shown, when a vacuum environment is entered inside the vacuum pipe 1, the air pressure on the connecting sealing part 32 will cause the connecting sealing part 32 to press against the connecting ring plate 2, thereby ensuring good sealing performance. This achieves a gas-sealed connection between the connecting sealing part 32 and the connecting ring plate 2 of the compensating sealing element 3. The compensating part 31 is protruding towards the side away from the thermal expansion joint 100, i.e., the compensating sealing element 3 protrudes towards the atmospheric pressure contact side. The air pressure on the compensating part 31 will cause it to press against the vacuum pipe 1. Simultaneously, the air pressure on the compensating part 31 is mainly borne by the membrane stress. The compensating part 31 converts the air pressure into a thrust on the connecting sealing part 32, further pressing the connecting sealing part 32. 2. This ensures better sealing performance, which in turn facilitates the gas-sealed connection between the connecting sealing part 32 of the compensating sealing element 3 and the connecting ring plate 2; 3. The displacement compensation and sealing structure for vacuum pipelines described in this invention is simple and easy to install, inspect, maintain, and replace; 4. Structural sealant 4 is used for connection at the higher pressure side of the connection between the compensating sealing element 3 and the connecting ring plate 2. On the one hand, this ensures good connection strength between the compensating sealing element 3 and the connecting ring plate 2; on the other hand, when the pipeline enters a vacuum environment, the structural sealant 4 can play a certain sealing role, thereby improving the sealing performance of the displacement compensation and sealing structure for vacuum pipelines described in this invention.

[0064] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A displacement compensation and sealing structure for a vacuum tube, characterized by, The displacement compensation and sealing structure for vacuum pipelines includes: Connecting ring plate (2), the connecting ring plate (2) is installed on the vacuum pipe (1) on both sides of the thermal expansion joint (100); Compensating sealing element (3), the compensating sealing element (3) is installed inside the connecting ring plate (2), and the compensating sealing element (3) is sleeved on the outside of the thermal expansion joint (100); The compensating sealing element (3) includes a compensating part (31) and a connecting sealing part (32). The connecting sealing part (32) is disposed at both ends of the compensating part (31). The compensating part (31) is arched or arc-shaped and protrudes towards the side away from the thermal expansion joint (100). The angle between the line connecting the midpoint and the endpoint of the compensation part (31) and the horizontal line is α, and α satisfies: 0°<α<45°; Structural sealant (4) is used to connect the connecting sealing part (32) and the connecting ring plate (2) on the side away from the thermal expansion joint (100); The connecting sealing part (32) is arched or arc-shaped; The connecting sealing part (32) is provided to protrude toward the side close to the compensation part (31); The angle between the line connecting the midpoint and the end point of the connecting sealing part (32) and the horizontal line is β, and β satisfies: 45°<β<90°; When the vacuum environment is entered into the vacuum pipe (1), the gas pressure on the connecting sealing part (32) will cause the connecting sealing part (32) to press against the connecting ring plate (2), thereby ensuring better sealing performance, and thus realizing the gas seal connection between the connecting sealing part (32) and the connecting ring plate (2) of the compensation sealing element (3); the gas pressure on the compensation part (31) will cause the compensation part (31) to press against the vacuum pipe (1), and at the same time, the gas pressure on the compensation part (31) is mainly borne by the membrane stress. The compensation part (31) converts the gas pressure into a thrust on the connecting sealing part (32), further pressing the connecting sealing part (32), thereby ensuring better sealing performance, and thus facilitating the gas seal connection between the connecting sealing part (32) and the connecting ring plate (2) of the compensation sealing element (3) 3.

2. The displacement compensation and sealing structure for a vacuum tube according to claim 1, wherein The compensation part (31) and the connecting sealing part (32) are heat-fused together.

3. The displacement compensation and sealing structure for a vacuum pipeline according to claim 1, characterized in that, The compensating sealing element (3) is integrally formed.

4. The displacement compensation and sealing structure for a vacuum tube according to claim 1, wherein The compensating sealing element (3) is made of non-metallic material.

5. The displacement compensation and sealing structure for a vacuum tube according to claim 1, wherein The connecting ring plate (2) is welded to the vacuum pipe (1).

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