Leakage repair clamp

By forming a glue injection cavity above the heat exchanger tube plate and injecting sealant, the problem of the leakage point of the heat exchanger tube plate cannot be effectively repaired in the prior art, and large-scale repair and efficient sealing are achieved.

CN222481240UActive Publication Date: 2025-02-14TIANJIN SLINGLIK SEALING TECH CO LTD
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Patent Information

Application Number
CN202421206932.7
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-05-30
Publication Date
2025-02-14
Estimated Expiration
2034-05-30

AI Technical Summary

Technical Problem

The prior art is difficult to effectively repair leak points that cannot be observed or have potential leakage risks in the heat exchanger tube plate, resulting in a small repair range and poor effect.

Method used

Provide a leakage repair fixture, which forms an injection cavity above the pipe plate through a closed loop connected by multiple sections of head and tail. Sealant is injected into the cavity using the injection hole to achieve a repair in the form of full injection, and further through the sealing groove and connection channel. Enhance the sealing effect.

Benefits of technology

It realizes extensive repair of the heat exchanger tube plate, enhances the sealing effect after repair, prevents media from leaking from bolt gaps, and significantly improves the repair effect.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model belongs to the technical field of heat exchanger leakage repairing, and discloses a leakage repairing clamp which comprises a plurality of closed rings connected end to end, each closed ring comprises a closed part and an insertion part connected with the closed part, the closed parts abut against a tube box and a shell pass, and the insertion parts are inserted between the tube box and the shell pass and used for forming a glue injection cavity above a tube plate. And the plurality of sections of closed rings are provided with glue injection holes communicated with the glue injection cavity. The sealing glue is injected into the glue injection cavity through the glue injection hole formed in the closed ring, so that the tube plate is repaired in a full glue injection mode, the repairing range is large, certain pressure can be generated on the sealing glue along with continuous injection of the sealing glue into the glue injection cavity, the effect is better after the sealing glue is repaired, and in addition, the sealing glue can be continuously injected into the glue injection cavity. And along with continuous injection of the sealant, the sealant is squeezed into a gap for connecting the tube box and the shell pass bolt under the action of pressure, so that a medium is prevented from leaking from the gap of the bolt, and the sealing effect after repair is further improved.
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Description

Technical Field

[0001] The utility model relates to the technical field of heat exchanger leakage repair, in particular to a leakage repair fixture. Background Art

[0002] Shell and tube heat exchangers are also called shell and tube heat exchangers. They mainly realize inter-wall heat transfer through the wall of the tube bundle enclosed in a cylindrical shell. This type of heat exchanger is widely used in various industrial fields due to its simple structure, low cost, reliable operation and easy cleaning and maintenance. The shell and tube heat exchanger mainly includes components such as the shell side, heat transfer tube bundle, tube sheet, baffle and tube box. The tube sheet is sandwiched between the shell side and the tube box, and a gasket for sealing is provided at the tube sheet.

[0003] As the heat exchanger runs for a long time, the gasket at the tube sheet seal will be damaged by many factors such as medium corrosion, internal pressure or temperature of the heat exchanger, etc., which will cause leakage at the tube sheet due to damage to the gasket.

[0004] At present, the common method of repairing is to apply sealant on the gasket of the tube sheet to seal the leakage point. However, this method can only repair the leakage points that can be observed. It cannot repair the places that cannot be observed or have potential leakage risks. The repair range is small and the repair effect is poor. Utility Model Content

[0005] The utility model aims to provide a leakage repairing fixture with a large repairing range and good repairing effect.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A leak repair fixture is provided, which is used to repair leaks at a tube sheet of a heat exchanger. The heat exchanger also includes a tube box and a shell side located on both sides of the tube sheet and bolted to each other. The leak repair fixture includes multiple sections of closed rings connected end to end. The closed rings include a closed portion and an inserted portion connected to the closed portion. The closed portion abuts against the tube box and the shell side. The inserted portion is inserted between the tube box and the shell side to form a glue injection cavity above the tube sheet. Multiple sections of the closed rings are provided with glue injection holes connected to the glue injection cavity.

[0008] Optionally, a sealing groove for filling a sealing material is further provided on the end surface of the insertion portion facing the pipe box and the shell side.

[0009] Optionally, the closed ring is provided with a plurality of rows of the glue injection holes evenly distributed between the two sealing grooves.

[0010] Optionally, a connecting channel is further provided on the closed ring, and the connecting channel is used to connect the sealing groove and the glue injection holes in an adjacent row.

[0011] Optionally, the leakage repair fixture further includes a splicing ear plate, which is arranged at both ends of the closed ring and is used to connect two adjacent closed rings.

[0012] Optionally, a mounting groove is provided on the splicing ear plate, and the closed ring is inserted into the mounting groove.

[0013] Optionally, a connecting through hole is provided on the splicing ear plate, and the leakage repair fixture includes a connecting bolt and a connecting nut, the head of the connecting bolt abuts against any one of the two adjacent splicing ear plates, the rod of the connecting bolt passes through the connecting through hole on the two adjacent splicing ear plates and is connected to the connecting nut, and the connecting nut abuts against the other of the two adjacent splicing ear plates.

[0014] Optionally, a plurality of the connecting through holes are provided on the splicing ear plate, and the leakage repair fixture includes the connecting bolts and the connecting nuts corresponding to the connecting through holes one by one.

[0015] Optionally, the leakage repair fixture further includes a glue injection joint, and the glue injection joint is inserted into the glue injection hole.

[0016] Optionally, a plugging slope is provided on a side of the insertion portion facing away from the closing portion.

[0017] Beneficial effects of the utility model:

[0018] The utility model provides a leakage repair clamp, which makes the closing parts on a plurality of closing rings connected end to end abut against the tube box and the shell side, and inserts the insertion part of the closing ring between the tube box and the shell side, so that the plurality of closing rings and the heat exchanger form a glue injection cavity above the tube sheet, and injects sealant into the glue injection cavity through the glue injection holes provided on the closing rings, so as to achieve full glue injection repair of the tube sheet, which not only has a large repair range, but also as the sealant is continuously injected into the glue injection cavity, a certain pressure is generated on the sealant, so that the effect of the sealant after repair is better, in addition, as the sealant is continuously injected, the sealant is squeezed into the gap of the bolts used to connect the tube box and the shell side under the action of pressure, so as to prevent the medium from leaking out from the gap of the bolts, and further improve the sealing effect after repair. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the connection between the leakage repair fixture provided by the utility model and the heat exchanger;

[0020] Figure 2It is a top view of the leakage repair fixture provided by the utility model;

[0021] Figure 3 yes Figure 2 Cross-sectional view along AA direction;

[0022] Figure 4 yes Figure 2 Cross-sectional view along direction BB;

[0023] Figure 5 It is a three-dimensional view of the leak repair fixture provided by the utility model;

[0024] Figure 6 It is a cross-sectional view of a closed ring in the leakage repair fixture provided by the utility model.

[0025] In the figure:

[0026] 100, shell side; 200, tube box; 300, tube sheet;

[0027] 1. Closed ring; 11. Closed portion; 12. Insertion portion; 13. Glue injection hole; 14. Sealing groove; 15. Connecting channel;

[0028] 2. Splice the ear panels;

[0029] 3. Connecting bolts;

[0030] 4. Connecting nut;

[0031] 5. Glue injection joint. DETAILED DESCRIPTION

[0032] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0033] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0035] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0036] Shell and tube heat exchangers are also called shell and tube heat exchangers. They mainly realize inter-wall heat transfer through the wall of the tube bundle enclosed in a cylindrical shell. This type of heat exchanger is widely used in various industrial fields due to its simple structure, low cost, reliable operation and easy cleaning and maintenance. The shell and tube heat exchanger mainly includes components such as the shell side, heat transfer tube bundle, tube sheet, baffle and tube box. The tube sheet is sandwiched between the shell side and the tube box, and a gasket for sealing is provided at the tube sheet.

[0037] As the heat exchanger runs for a long time, the gasket at the tube sheet seal will be damaged by many factors such as medium corrosion, internal pressure or temperature of the heat exchanger, etc., which will cause leakage at the tube sheet due to damage to the gasket.

[0038] At present, the common method of repairing is to apply sealant on the gasket of the tube sheet to seal the leakage point. However, this method can only repair the leakage points that can be observed. It cannot repair the places that cannot be observed or have potential leakage risks. The repair range is small and the repair effect is poor.

[0039] Therefore, in order to expand the scope of repair and improve the sealing effect after repair, this embodiment provides a leak repair fixture, which is used to repair the leakage point at the tube sheet of the heat exchanger. The heat exchanger includes a tube box and a shell side, and the tube sheet is located between the tube box and the shell side.

[0040] like Figures 1 to 6As shown, the leakage repair fixture includes a plurality of closed rings 1 connected end to end, the closed ring 1 includes a closed portion 11 and an inserted portion 12 connected to the closed portion 11, the closed portion 11 abuts against the pipe box 200 and the shell side 100, the inserted portion 12 is inserted between the pipe box 200 and the shell side 100 to form a glue injection cavity above the tube sheet 300, and the plurality of closed rings 1 are all provided with a glue injection hole 13 connected to the glue injection cavity.

[0041] By bringing the closing parts 11 on a plurality of closed rings 1 connected end to end into contact with the pipe box 200 and the shell side 100, and inserting the inserting part 12 of the closed ring 1 between the pipe box 200 and the shell side 100, a glue injection cavity is formed above the tube sheet 300 between the plurality of closed rings 1 and the heat exchanger, and sealant is injected into the glue injection cavity through the glue injection holes 13 provided on the closed ring 1, thereby achieving full glue injection repair of the tube sheet 300. Not only is the repair range large, but as the sealant is continuously injected into the glue injection cavity, a certain pressure is generated on the sealant, thereby making the effect of the sealant after repair better. In addition, as the sealant is continuously injected, the sealant is squeezed into the gap of the bolts used to connect the pipe box 200 and the shell side 100 under the action of pressure, thereby preventing the medium from leaking out from the gap of the bolts, further improving the sealing effect after repair.

[0042] Among them, since multiple closed rings 1 can be used to form the leakage repair fixture, the number of closed rings 1 can be freely set according to needs. In this embodiment, four closed rings 1 are used to form the leakage repair fixture, wherein the closing part 11 and the insertion part 12 on the closed ring 1 are manufactured by integral molding.

[0043] Alternatively, if Figure 6 As shown, a sealing groove 14 for filling a sealing material is provided on the end surface of the inserting portion 12 facing the pipe box 200 and the shell side 100. By providing a sealing groove 14 for filling a sealing material on the end surface of the inserting portion 12 facing the pipe box 200 and the shell side 100, the injection cavity is sealed to prevent the sealant from leaking out from the gap between the inserting portion 12 and the pipe box 200 or between the inserting portion 12 and the shell side 100 during injection. In this embodiment, the sealing material is a packing.

[0044] Furthermore, if Figure 6 As shown, the closed ring 1 is provided with multiple rows of injection holes 13 evenly distributed between two sealing grooves 14. By providing multiple rows of evenly distributed injection holes 13, the speed of injecting sealant is accelerated, and the uniformity of injection is ensured, thereby enhancing the sealing effect after repair.

[0045] Furthermore, if Figure 6As shown, the closed ring 1 is further provided with a connecting channel 15, which is used to connect the sealing groove 14 and the glue injection holes 13 in an adjacent row. By providing the connecting channel 15 connecting the sealing groove 14 and the glue injection holes 13, when the glue is injected, the sealant enters the sealing groove 14 through the connecting channel 15, exerts pressure on the sealing material in the sealing groove 14, and improves the sealing effect.

[0046] Alternatively, if Figure 5 As shown, the leakage repair fixture also includes a splicing ear plate 2, which is arranged at both ends of the closed ring 1, and the splicing ear plate 2 is used to connect two adjacent closed rings 1. By providing the splicing ear plate 2, it is convenient to connect two adjacent closed rings 1, thereby improving the convenience of connection.

[0047] Furthermore, a mounting groove is provided on the splicing ear plate 2, and the closed ring 1 is inserted into the mounting groove. By providing the mounting groove on the splicing ear plate 2, a certain distance is reserved between the splicing ear plate 2 and the heat exchanger, thereby providing an operating space for subsequent connection work. In this embodiment, after the splicing ear plate 2 is provided on the closed ring 1 through the mounting groove, the splicing ear plate 2 and the closed ring 1 are welded to ensure the firmness of the connection.

[0048] Alternatively, if Figure 5 As shown, a connecting through hole is provided on the splicing ear plate 2, and the leakage repair fixture includes a connecting bolt 3 and a connecting nut 4. The head of the connecting bolt 3 abuts against any one of the two adjacent splicing ear plates 2, and the rod of the connecting bolt 3 passes through the connecting through holes on the two adjacent splicing ear plates 2 to connect with the connecting nut 4, and the connecting nut 4 abuts against the other of the two adjacent splicing ear plates 2. The bolt connection method is convenient for disassembling and assembling the two adjacent splicing ear plates 2.

[0049] Furthermore, a plurality of connecting through holes are provided on the splicing ear plate 2, and the leakage repair fixture includes connecting bolts 3 and connecting nuts 4 corresponding to the connecting through holes. By providing a plurality of connecting through holes on the splicing ear plate 2, and connecting bolts 3 and connecting nuts 4 corresponding to the plurality of connecting through holes, the firmness of the connection between two adjacent splicing ear plates 2 is ensured. In this embodiment, three sets of connecting bolts 3 and connecting nuts 4 are used to connect each two adjacent splicing ear plates 2.

[0050] Alternatively, if Figure 5 As shown, the leak repair fixture also includes a glue injection joint 5, and the glue injection joint 5 is inserted in the glue injection hole 13. By providing the glue injection joint 5, it is convenient for the glue injection device to be docked with the glue injection hole 13.

[0051] Optionally, a plugging slope is provided on the side of the inserting portion 12 away from the closing portion 11. By providing the plugging slope on the side of the inserting portion 12 away from the closing portion 11, the plugging slope guides the plugging of the inserting portion 12, making it easier for the inserting portion 12 to be inserted between the pipe box 200 and the shell 100.

[0052] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A leak repair fixture, the leak repair fixture is used to repair a leak point at a tube sheet (300) of a heat exchanger, the heat exchanger further comprising a tube box (200) and a shell side (100) located on both sides of the tube sheet (300) and bolted to each other, characterized in that: The leakage repair fixture comprises a plurality of closed rings (1) connected end to end, the closed ring (1) comprising a closed portion (11) and an inserted portion (12) connected to the closed portion (11), the closed portion (11) abutting against the pipe box (200) and the shell side (100), the inserted portion (12) being inserted between the pipe box (200) and the shell side (100) to form a glue injection cavity above the tube sheet (300), and the plurality of closed rings (1) are each provided with a glue injection hole (13) connected to the glue injection cavity.

2. The leak repair fixture according to claim 1, characterized in that: A sealing groove (14) for filling a sealing material is also provided on the end surface of the insertion portion (12) facing the pipe box (200) and the shell side (100).

3. The leak repair fixture according to claim 2, characterized in that: The closed ring (1) is provided with a plurality of rows of glue injection holes (13) evenly distributed between the two sealing grooves (14).

4. The leak repair fixture according to claim 3, characterized in that: The closed ring (1) is also provided with a connecting channel (15), and the connecting channel (15) is used to connect the sealing groove (14) and the glue injection holes (13) in an adjacent row.

5. The leak repair fixture according to claim 1, characterized in that: The leakage repair fixture further comprises a splicing ear plate (2), wherein the splicing ear plate (2) is arranged at both ends of the closed ring (1), and the splicing ear plate (2) is used to connect two adjacent closed rings (1).

6. The leak repair fixture according to claim 5, characterized in that: The splicing ear plate (2) is provided with a mounting groove, and the closed ring (1) is inserted into the mounting groove.

7. The leak repair fixture according to claim 5, characterized in that: A connecting through hole is provided on the splicing ear plate (2), and the leakage repair fixture comprises a connecting bolt (3) and a connecting nut (4), the head of the connecting bolt (3) abuts against any one of the two adjacent splicing ear plates (2), the rod of the connecting bolt (3) passes through the connecting through hole on the two adjacent splicing ear plates (2) and is connected to the connecting nut (4), and the connecting nut (4) abuts against the other of the two adjacent splicing ear plates (2).

8. The leak repair fixture according to claim 7, characterized in that: The splicing ear plate (2) is provided with a plurality of the connecting through holes, and the leakage repair fixture comprises the connecting bolts (3) and the connecting nuts (4) corresponding one by one to the connecting through holes.

9. The leak repair fixture according to claim 1, characterized in that: The leakage repair fixture further comprises a glue injection joint (5), and the glue injection joint (5) is inserted into the glue injection hole (13).

10. The leak repair fixture according to claim 1, characterized in that: A plugging slope is provided on the side of the insertion portion (12) facing away from the closing portion (11).