Anti-corrosion sealing expansion joint

Abstract

The utility model relates to an anti-corrosion sealing expansion joint. The sealing structure comprises a pair of end plates, a screw rod, a welding groove and a screw hole, and further comprises a sealing component, a sealing groove is formed in each end plate, the sealing component comprises a sealing plate, one side face of the sealing plate right faces the sealing groove and is arranged to be a front sealing end face, and the other end of the sealing plate is arranged to be a rear sealing end face; a front sealing ring for sealing the sealing groove is fixedly arranged on the front sealing end surface; a rear sealing ring for sealing the rear sealing end surface when the expansion joint is mounted is fixedly arranged on the rear sealing end surface; the welding groove is formed in the outer end edge of the end plate of the anti-corrosion sealing expansion joint, the problem that when a traditional expansion joint is connected with an external industrial pipeline, a welding point is located outside, and breakage is prone to being caused by slight dislocation is solved, and the welding groove is formed so that the connecting welding point of the expansion joint and the pipeline can be located in the structure of the expansion joint; the stability and the reliability of connection are enhanced, and the risk that the welding position is broken due to external force is reduced.

Description

Technical Field

[0001] This utility model relates to the field of expansion joint technology, specifically to a corrosion-resistant and sealing expansion joint. Background Technology

[0002] In industrial piping systems, expansion joints serve as critical connecting components, absorbing displacement and temperature changes in the pipeline to ensure system stability and safety.

[0003] However, traditional expansion joints have shortcomings in corrosion protection and sealing, which can easily lead to decreased sealing performance and leakage problems, affecting the normal operation and safety of the pipeline system. This is especially true at the connection between the expansion joint and the external industrial pipeline, where leakage is prone to occur and corrosion can occur at the joint. In addition, since most current expansion joints are cast in one piece without welds or weld bevels, the weld points are located outside the expansion joint when the connection is made with the industrial pipeline. Therefore, even slight misalignment of the expansion joint can easily cause the weld to break. Therefore, we have made technical improvements to existing expansion joints to meet the usage requirements. Utility Model Content

[0004] The technical problem to be solved by this utility model is to address the shortcomings of the existing technology by providing a corrosion-resistant and sealing expansion joint with a welding bevel and improved sealing effect by adding sealing components.

[0005] The technical problem to be solved by this utility model is achieved through the following technical solution: a corrosion-resistant and sealing expansion joint, comprising;

[0006] A pair of end plates, with a corrugated pipe fixedly installed between the pair of end plates, and several sets of nuts fixedly installed on the outer circumferential surface of the end plates, with screws threaded onto the nuts;

[0007] The welding bevel is formed on the flat end face edge of the end plate away from the bellows.

[0008] The screw hole is located on the end plate between the welding bevel and the bellows.

[0009] A sealing component, comprising a sealing plate that runs through the middle, a sealing groove for accommodating the sealing plate is provided on the flat end face of the end plate away from the bellows, a through hole communicating with the screw hole is provided on the sealing plate, one side of the sealing plate faces the sealing groove and is set as the front sealing end face, and the other end is set as the rear sealing end face.

[0010] A front sealing ring is fixedly provided on the front sealing end face, and an installation groove is provided in the sealing groove to accommodate the front sealing ring.

[0011] A rear sealing ring is fixedly provided on the rear sealing end face to seal the rear sealing end face during expansion joint installation.

[0012] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the anti-corrosion sealing expansion joint described above has three sets of nuts, and the included angle of adjacent sets of nuts is the same.

[0013] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the anti-corrosion sealing expansion joint described above, wherein the axes of the sealing plate, the front sealing ring and the rear sealing ring are collinear.

[0014] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the anti-corrosion sealing expansion joint described above, wherein the sealing plate is formed into an annular plate structure.

[0015] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the anti-corrosion sealing expansion joint described above, wherein the thickness of the sealing plate is half the thickness of the end plate.

[0016] Compared with the prior art, the beneficial technical effects of this utility model are as follows:

[0017] (1) The outer edge of the end plate of the anti-corrosion sealing expansion joint is provided with a welding bevel, which avoids the problem that the welding point of the traditional expansion joint is located on the outside when connected to the external industrial pipeline and is prone to breakage due to slight misalignment. The setting of the welding bevel allows the connection welding point between the expansion joint and the pipeline to be located inside its structure, which enhances the stability and reliability of the connection and reduces the risk of the weld breaking due to external force.

[0018] (2) The sealing plate of the sealing component and the front sealing ring and the rear sealing ring fixed on the front and rear end faces not only ensure that the expansion joint has good sealing performance during installation and operation, effectively preventing leakage problems, but also enhance the corrosion resistance of the expansion joint connection and extend its service life. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the sealing plate of this utility model from the left side.

[0021] Reference numerals: 1. End plate; 2. Bellows; 3. Nut; 4. Screw; 5. Welding bevel; 6. Screw hole; 7. Sealing plate; 8. Sealing groove; 9. Front sealing ring; 10. Mounting groove; 11. Rear sealing ring. Detailed Implementation

[0022] The specific technical solutions of this utility model are further described below with reference to the accompanying drawings, so as to enable those skilled in the art to further understand this utility model, without constituting a limitation on its rights.

[0023] Example 1, referring to Figure 1-2 A corrosion-resistant sealing expansion joint, comprising:

[0024] A pair of end plates 1, the end plates 1 are formed into a roughly annular plate structure, a corrugated pipe 2 is fixedly installed between the pair of end plates 1, and several sets of nuts 3 are fixedly installed on the outer circumferential surface of the end plates 1. There are three sets of nuts 3, and the included angle between two adjacent sets of nuts 3 is the same. A screw rod 4 is screwed onto the nut 3.

[0025] To avoid the defects caused by external weld points being prone to breakage, we have added a welding bevel 5. The welding bevel 5 is roughly circular in shape and is set on the flat end edge of the end plate 1 away from the bellows 2. The addition of the welding bevel 5 avoids the problem that the welding point of the traditional expansion joint is located on the outside when connected to the external industrial pipeline, which is prone to breakage due to slight misalignment. The setting of the welding bevel 5 allows the connection weld point between the expansion joint and the pipeline to be located inside its structure, which enhances the stability and reliability of the connection and reduces the risk of the weld breaking due to external force.

[0026] Screw hole 6 is provided on end plate 1 between welding bevel 5 and bellows 2;

[0027] To improve the sealing performance of the expansion joint, a sealing component is added. The sealing component includes a sealing plate 7 that runs through the middle. The sealing plate 7 is formed into a roughly circular annular plate structure. A sealing groove 8 is formed on the flat end face of the end plate 1 away from the bellows 2 to accommodate the sealing plate 7. The sealing groove 8 is formed into a roughly annular groove. A through hole is formed on the sealing plate 7 that communicates with the screw hole 6. One side of the sealing plate 7 faces the sealing groove 8 and is set as the front sealing end face, and the other end is set as the rear sealing end face.

[0028] A front sealing ring 9 is fixedly provided on the front sealing end face. The front sealing ring 9 is formed into a circular ring shape. An installation groove 10 is provided in the sealing groove 8 to accommodate the front sealing ring 9. The installation groove 10 is formed into an annular groove.

[0029] A rear sealing ring 11 is fixedly provided on the rear sealing end face to seal the rear sealing end face during the installation of the expansion joint. The rear sealing ring 11 is formed into a circular ring shape, and the axes of the sealing plate 7, the front sealing ring 9 and the rear sealing ring 11 are collinear.

[0030] When using the anti-corrosion sealing expansion joint described in Example 1, simply place the sealing plate 7 in the sealing groove 8, and then connect the expansion joint to the external pipe flange with bolt fasteners. This causes the front sealing ring 9 to abut against the bottom of the mounting groove 10, and the rear sealing ring 11 to abut against the inner wall of the external pipe, thus forming two seals. Then, the flange end face of the external pipe is welded to the welding bevel 5 of the expansion joint to further increase its sealing performance.

[0031] Compared to traditional expansion joints, this design solves the problem that exposed weld points in traditional designs are easily damaged and broken due to slight displacement of the pipeline. In other words, by cleverly opening a welding bevel 5 on the edge of the end plate 1, the welding operation can be carried out inside the expansion joint structure, thereby ensuring effective isolation of the weld point from the external environment. This not only greatly enhances the stability and reliability of the connection between the expansion joint and the pipeline, but also significantly reduces the risk of weld point breakage due to external forces, ensuring the stable operation of industrial pipelines and extending their service life to a certain extent.

Claims

1. A corrosion-resistant and sealing expansion joint, characterized in that: It includes; A pair of end plates, with a corrugated pipe fixedly installed between the pair of end plates, and several sets of nuts fixedly installed on the outer circumferential surface of the end plates, with screws threaded onto the nuts; The welding bevel is formed on the flat end face edge of the end plate away from the bellows. The screw hole is located on the end plate between the welding bevel and the bellows. A sealing component, comprising a sealing plate that runs through the middle, a sealing groove for accommodating the sealing plate is provided on the flat end face of the end plate away from the bellows, a through hole communicating with the screw hole is provided on the sealing plate, one side of the sealing plate faces the sealing groove and is set as the front sealing end face, and the other end is set as the rear sealing end face. A front sealing ring is fixedly provided on the front sealing end face, and an installation groove is provided in the sealing groove to accommodate the front sealing ring. A rear sealing ring is fixedly provided on the rear sealing end face to seal the rear sealing end face during expansion joint installation.

2. The anti-corrosion sealing expansion joint according to claim 1, characterized in that: The nuts are provided in three sets, with the included angle between adjacent sets of nuts being the same.

3. The anti-corrosion sealing expansion joint according to claim 1, characterized in that: The axes of the sealing plate, the front sealing ring, and the rear sealing ring are collinear.

4. The anti-corrosion sealing expansion joint according to claim 1, characterized in that: The sealing plate is formed into a ring-shaped plate structure.

5. The anti-corrosion sealing expansion joint according to claim 1, characterized in that: The thickness of the sealing plate is half the thickness of the end plate.

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