A protective liner installation structure and base pipe repair method

Abstract

The present invention discloses a protective liner installation structure and a base pipe repair method, comprising: a liner body, a tube box, a tube sheet, a base pipe, and a sealing ring. The bottom of the tube box has a pressure plate, the tube box is installed on the upper surface of the tube sheet, the lower surface of the pressure plate abuts against the upper surface of the tube sheet, one end of the base pipe is installed on the tube sheet, the lower part of the liner body extends into the base pipe, the sealing ring is sleeved on the upper part of the liner body, the lower surface of the sealing ring abuts against the upper surface of the tube sheet, and the upper part of the liner body abuts against the upper surface of the sealing ring. Through the application of the present invention, a protective liner installation structure and a base pipe repair method are provided. When the base pipe is damaged, the second tube body is extended into the base pipe and fixed by the first tube body, without the need to disassemble the base pipe for repair, thus saving repair time. The present invention has a simple structure, is easy and quick to install, and is convenient for production.

Description

Technical Field

[0001] The present invention relates to the technical field of heat exchange device structures of indirect air cooling system equipment, and in particular to a protective liner installation structure and a base pipe repair method. Background Art

[0002] Indirect air-cooling units operate in high-altitude, cold regions for extended periods. Due to various factors, such as medium corrosion, fluid erosion, and harsh external conditions, the base pipes experience thinning wall thickness and even cracking. Leaking radiators require long factory repair times, complex processes, and high costs, and their direct impact on the operating air-cooling units. Therefore, to minimize economic losses, on-site repair of acceptable base pipe damage has become the preferred approach for power plants and manufacturers. Currently, the conventional maintenance method involves hoisting leaking cooling columns to the ground one by one and repairing them by installing a complete liner. This approach carries high maintenance costs, and sometimes, due to various restrictions, hoisting is not feasible. Summary of the Invention

[0003] In view of this, in order to solve the above problems, the present invention aims to provide a protective liner installation structure, comprising:

[0004] The liner body, tube box, tube sheet, base pipe and sealing ring are provided with a pressure plate at the bottom of the tube box, the tube box is installed on the upper surface of the tube sheet, the lower surface of the pressure plate is against the upper surface of the tube sheet, one end of the base pipe is installed on the tube sheet, the lower part of the liner body extends into the base pipe, the sealing ring is sleeved on the upper part of the liner body, the lower surface of the sealing ring is against the upper surface of the tube sheet, and the upper part of the liner body is against the upper surface of the sealing ring.

[0005] In another preferred embodiment, the outer diameter of the upper portion of the liner body is greater than the inner diameter of the base pipe, and the outer diameter of the lower portion of the liner body is less than or equal to the inner diameter of the base pipe.

[0006] In another preferred embodiment, the liner body includes a first tube body and a second tube body connected in sequence from top to bottom, the inner diameter of the first tube body is equal to the inner diameter of the second tube body, and the outer diameter of the first tube body is greater than the outer diameter of the second tube body.

[0007] In another preferred embodiment, the first tube body and the second tube body are integrally provided.

[0008] In another preferred embodiment, a mounting hole is provided on the tube plate, one end of the base pipe is sleeved in the mounting hole, and the inner diameter of the mounting hole is equal to the outer diameter of the base pipe.

[0009] In another preferred embodiment, a fixing hole is opened on the pressure plate, and the fixing hole includes a first channel portion, a second channel portion and a third channel portion connected in sequence from top to bottom. The inner diameter of the first channel portion is smaller than the outer diameter of the first tube body, the inner diameter of the second channel portion is equal to the outer diameter of the first tube body, and the inner contour of the third channel portion matches the outer contour of the sealing ring.

[0010] In another preferred embodiment, the outer diameter of the second pipe body is equal to the inner diameter of the base pipe.

[0011] In another preferred embodiment, it further comprises: a fastening assembly, wherein the lower portion of the fastening assembly is mounted on the tube sheet, and the upper portion of the fastening assembly abuts against the outer wall of the tube box.

[0012] In another preferred embodiment, the fastening assembly includes: a bolt and a nut, an adjustment hole is opened on the tube plate, the lower part of the bolt is installed in the adjustment hole, the nut is sleeved on the lower end of the bolt, and the upper part of the bolt is against the outer wall of the tube box.

[0013] The present invention also aims to provide a protective liner installation structure and a base pipe repair method, including any one of the above protective liner installation structures, comprising the following steps:

[0014] Step S1, cutting one end of the damaged base tube to be flush with or lower than the upper surface of the tube sheet;

[0015] Step S2, sleeve the sealing ring on the upper part of the liner body;

[0016] Step S3, the lower portion of the liner body extends into the base pipe until the lower surface of the sealing ring abuts against the upper surface of the tube sheet;

[0017] Step S4, using a tube expansion device to tightly fit the outer wall of the lower portion of the liner body to the inner wall of the base pipe;

[0018] Step S5: Place the tube box on the tube sheet, and allow the upper end of the protective liner to extend into the pressure plate.

[0019] Due to the adoption of the above technical solution, the present invention has the following positive effects compared with the prior art: through the application of the present invention, a protective liner installation structure and a base pipe repair method are provided. When the base pipe is damaged, the second pipe body is extended into the base pipe and fixed by the first pipe body. There is no need to disassemble the base pipe for maintenance, which saves maintenance time. The present invention has a simple structure, is easy and quick to install, and is convenient for production. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a partial schematic diagram of a protective liner installation structure of the present invention;

[0021] Figure 2This is a schematic diagram of the installation of a protective liner installation structure of the present invention.

[0022] In the accompanying drawings: 1. liner body; 2. first tube body; 3. second tube body; 4. tube box; 5. tube sheet; 6. base tube; 7. sealing ring; 8. mounting hole; 9. fixing hole; 10. fastening assembly; 11. nut; 12. bolt; 13. pressure plate. DETAILED DESCRIPTION

[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0024] like Figures 1 to 2 As shown, a protective liner installation structure of a preferred embodiment is shown, comprising:

[0025] The liner body 1, the tube box 4, the tube sheet 5, the base pipe 6 and the sealing ring 7. The bottom of the tube box 4 has a pressure plate 13. The tube box 4 is installed on the upper surface of the tube sheet 5. The lower surface of the pressure plate 13 is against the upper surface of the tube sheet 5. One end of the base pipe 6 is installed on the tube sheet 5. The lower part of the liner body 1 extends into the base pipe 6. The sealing ring 7 is sleeved on the upper part of the liner body 1. The lower surface of the sealing ring 7 is against the upper surface of the tube sheet 5. The upper part of the liner body 1 is against the upper surface of the sealing ring 7.

[0026] Furthermore, as a preferred embodiment, the outer diameter of the upper portion of the liner body 1 is greater than the inner diameter of the base pipe 6 , and the outer diameter of the lower portion of the liner body 1 is less than or equal to the inner diameter of the base pipe 6 .

[0027] Furthermore, as a preferred embodiment, the liner body 1 includes a first tube body 2 and a second tube body 3 connected sequentially from top to bottom. The inner diameter of the first tube body 2 is equal to the inner diameter of the second tube body 3, and the outer diameter of the first tube body 2 is greater than the outer diameter of the second tube body 3. Furthermore, the first tube body 2 and the second tube body 3 are coaxially arranged. An annular surface is formed along the lower end of the first tube body 2, which abuts against the upper surface of the sealing ring 7 to facilitate the fixing of the liner body 1.

[0028] Furthermore, as a preferred embodiment, the first tube body 2 and the second tube body 3 are integrally provided.

[0029] Furthermore, as a preferred embodiment, the liner body 1 is made of nylon material.

[0030] Furthermore, as a preferred embodiment, a mounting hole 8 is provided on the tube plate 5 , one end of the base tube 6 is sleeved in the mounting hole 8 , and the inner diameter of the mounting hole 8 is equal to the outer diameter of the base tube 6 .

[0031] Furthermore, as a preferred embodiment, a fixing hole 9 is defined in the pressure plate 13. The fixing hole 9 includes a first channel portion, a second channel portion, and a third channel portion, which are sequentially connected from top to bottom. The inner diameter of the first channel portion is smaller than the outer diameter of the first tube body 2, the inner diameter of the second channel portion is equal to the outer diameter of the first tube body 2, and the inner contour of the third channel portion matches the outer contour of the sealing ring 7. Furthermore, the axial length of the second channel portion is equal to the axial length of the first tube body 2, and the axial length of the third channel portion is equal to the axial length of the sealing ring 7. This ensures that the first tube body 2, the sealing ring 7, and the tube sheet 5 are in close contact with each other during installation.

[0032] Furthermore, as a preferred embodiment, the outer diameter of the second tube body 3 is equal to the inner diameter of the base tube 6 .

[0033] The above are only preferred embodiments of the present invention and are not intended to limit the implementation and protection scope of the present invention.

[0034] The present invention also has the following implementation modes based on the above:

[0035] In a further embodiment of the present invention, the present invention further comprises: a fastening assembly 10 , wherein the lower portion of the fastening assembly 10 is mounted on the tube sheet 5 , and the upper portion of the fastening assembly 10 abuts against the outer wall of the tube box 4 .

[0036] In a further embodiment of the present invention, the fastening assembly 10 includes: a bolt 12 and a nut 11. An adjustment hole is opened on the tube plate 5. The lower part of the bolt 12 is installed in the adjustment hole. The nut 11 is sleeved on the lower end of the bolt 12. The upper part of the bolt 12 is against the outer wall of the pipe box 4.

[0037] The present invention also aims to provide a protective liner installation structure and a base pipe repair method, including any one of the above protective liner installation structures, comprising the following steps:

[0038] Step S1: Cut one end of the damaged base tube 6 to the level with or below the upper surface of the tube sheet 5.

[0039] Step S2, sleeve the sealing ring 7 on the upper part of the liner body 1;

[0040] Step S3: The lower portion of the liner body 1 extends into the base pipe 6 until the lower surface of the sealing ring 7 abuts against the upper surface of the tube sheet 5;

[0041] Step S4, using a tube expansion device to tightly fit the outer wall of the lower portion of the liner body 1 to the inner wall of the base pipe 6;

[0042] Step S5: Place the tube box 3 on the tube sheet 5, and make the upper end of the liner body 1 extend into the pressing plate 13;

[0043] Step S6: Use the fastening assembly 10 to butt the tube sheet 2 against the tube box 3 .

[0044] In a further embodiment of the present invention, the tube expansion device includes a plug that is operable to expand outward or contract inward radially of the liner body 1. Furthermore, during use, the plug is inserted into the second tube body 3 and expanded radially outwardly, thereby tightly contacting the outer wall of the second tube body 3 with the inner wall of the base pipe 9.

[0045] The above are only preferred embodiments of the present invention and do not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A protective liner installation structure, characterized in that: include: A liner body, a tube box, a tube sheet, a base pipe, and a sealing ring. The bottom of the tube box has a pressure plate. The tube box is mounted on the upper surface of the tube sheet. The lower surface of the pressure plate abuts against the upper surface of the tube sheet. One end of the base pipe is mounted on the tube sheet. The lower portion of the liner body extends into the base pipe. The sealing ring is sleeved on the upper portion of the liner body. The lower surface of the sealing ring abuts against the upper surface of the tube sheet. The upper portion of the liner body abuts against the upper surface of the sealing ring. It also includes a fastening assembly, the lower part of which is installed on the tube plate, and the upper part of which is against the outer wall of the tube box.

2. The protective liner installation structure according to claim 1, characterized in that: The outer diameter of the upper portion of the liner body is greater than the inner diameter of the base pipe, and the outer diameter of the lower portion of the liner body is less than or equal to the inner diameter of the base pipe.

3. The protective liner installation structure according to claim 1, characterized in that: The liner body includes a first tube body and a second tube body connected in sequence from top to bottom, the inner diameter of the first tube body is equal to the inner diameter of the second tube body, and the outer diameter of the first tube body is greater than the outer diameter of the second tube body.

4. The protective liner installation structure according to claim 3, characterized in that: The first tube body and the second tube body are integrally provided.

5. The protective liner installation structure according to claim 1, characterized in that: The tube plate is provided with a mounting hole, one end of the base tube is sleeved in the mounting hole, and the inner diameter of the mounting hole is equal to the outer diameter of the base tube.

6. The protective liner installation structure according to claim 3, characterized in that: A fixing hole is provided on the pressure plate, and the fixing hole includes a first channel portion, a second channel portion and a third channel portion connected in sequence from top to bottom. The inner diameter of the first channel portion is smaller than the outer diameter of the first tube body, the inner diameter of the second channel portion is equal to the outer diameter of the first tube body, and the inner contour of the third channel portion matches the outer contour of the sealing ring.

7. The protective liner installation structure according to claim 3, characterized in that: The outer diameter of the second tube body is equal to the inner diameter of the base tube.

8. The protective liner installation structure according to claim 1, characterized in that: The fastening assembly includes: a bolt and a nut. An adjustment hole is opened on the tube plate. The lower part of the bolt is installed in the adjustment hole. The nut is sleeved on the lower end of the bolt. The upper part of the bolt is against the outer wall of the tube box.

9. A protective liner installation structure and a base pipe repair method, comprising the protective liner installation structure according to any one of claims 1 to 8, characterized in that: The steps include: Step S1, cutting one end of the damaged base tube to be flush with or lower than the upper surface of the tube sheet; Step S2, sleeve the sealing ring on the upper part of the liner body; Step S3, the lower portion of the liner body extends into the base pipe until the lower surface of the sealing ring abuts against the upper surface of the tube sheet; Step S4, using a tube expansion device to tightly fit the outer wall of the lower portion of the liner body to the inner wall of the base pipe; Step S5: placing the tube box on the tube sheet, and allowing the upper end of the liner body to extend into the pressure plate.

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