Tube plate type convection heat exchange tube

By limiting the flow of flue gas in the pipe plate-type convection heat exchange pipe, ensuring that the welding interface does not come into contact with high-temperature flue gas, the problem of wear of the welds of traditional heat exchange pipes is solved, and a safer and more efficient heat exchange effect is achieved.

CN222460368UActive Publication Date: 2025-02-11CHANG ZHOU LIAN HE GUO LU RONG QI YOU XIAN GONG SI
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Patent Information

Application Number
CN202421193862.6
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-05-29
Publication Date
2025-02-11
Estimated Expiration
2034-05-29

AI Technical Summary

Technical Problem

The welds of traditional convection heat exchange pipes are prone to wear under the erosion of high-temperature flue gas, resulting in serious problems such as oil leakage and ignition.

Method used

A pipe plate-type convection heat exchange tube is designed to prevent wear by limiting the flow of flue gas between the pipe plates. At the same time, a contact layer made of rubber material is used to ensure sealing and protection.

Benefits of technology

It effectively prevents the welding interface from being washed and worn by flue gas, ensures the safe operation of the equipment, and improves the uniformity of the heat exchange effect and the sealing of the pipe body.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a tube plate type convection heat exchange tube, which is applied to the field of tube plate type heat exchange tubes and comprises a tube body, an inlet header is arranged at one end of the tube body, an outlet header is arranged at the other end of the tube body, first tube plates are arranged on two sides of the surface of the tube body, and second tube plates are arranged on the rear sides of the first tube plates. Flue gas at the high-temperature flue gas inlet and the high-temperature flue gas outlet circulates, so that heat is transferred to the surfaces of the tube bodies, the flue gas is limited between the first tube plate and the second tube plate, the high-temperature flue gas is only in contact with the tube bodies between the tube plates, and butt-joint welding openings between all the heat exchange tubes are located on the outer sides of the first tube plate and the second tube plate. The welding opening does not make contact with high-temperature flue gas, the welding opening is effectively prevented from being scoured by the flue gas and abraded, guarantee is provided for safe operation of equipment, and meanwhile the contact layer guarantees the sealing performance of the two ends of the pipe body.
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Description

Technical Field

[0001] The utility model belongs to the field of tube-sheet heat exchange tubes, in particular to tube-sheet convection heat exchange tubes. Background Art

[0002] Convection heat exchange tubes use high-temperature flue gas to flush the heat exchange tubes, and use the principle of convection heat transfer to heat the medium in the tubes, thereby achieving the purpose of heat exchange. In traditional convection heat exchange tubes, the entire heat exchange tube and the welds between the tubes are in contact with high-temperature flue gas. In the process of flue gas constantly flushing the heat exchange tubes, the welds of the tubes are the weakest point because of the large amount of dust in the high-temperature flue gas. The welds will be worn first during the continuous flushing process, resulting in serious consequences such as oil leakage and fire. Utility Model Content

[0003] The utility model aims to provide a tube-sheet type convection heat exchange tube, which has the advantages of effectively preventing the welding port from being washed by smoke and worn and having a significant heat exchange effect.

[0004] The above-mentioned technical objective of the utility model is achieved through the following technical scheme: a tube-sheet type convection heat exchange tube, comprising a tube body, one end of the tube body is provided with an inlet header, the other end of the tube body is provided with an outlet header, both sides of the surface of the tube body are provided with tube sheets 1, the rear side of the tube sheet 1 is provided with tube sheets 2, the opposite surfaces of the tube sheets 1 and 2 are provided with clamping grooves, one side of the tube body is fixedly installed with a positioning rod, the two ends of one side of the tube sheets 1 and 2 are respectively fixedly installed with mounting plates 1 and 2, one side of the mounting plate 1 is provided with bolts, the interior of the tube sheet 1 is penetrated by a left guide plate, the interior of the tube sheet 2 is penetrated by a right guide plate, the interiors of the tube sheets 1 and 2 are provided with through holes for respectively cooperating with the left guide plate and the right guide plate, the top of the left guide plate is provided with an insertion rod 1 that penetrates to the bottom of the left guide plate, and the top of the right guide plate is provided with an insertion rod 2 that penetrates to the bottom of the right guide plate.

[0005] The above technical solution is adopted: in the use of the tube-sheet type convection heat exchange tube, the inlet header and the outlet header are used in conjunction with the tube body respectively, and the flue gas at the high-temperature flue gas inlet and the high-temperature flue gas outlet circulates, thereby transferring heat to the surface of the tube body, wherein the flue gas is restricted between the two groups of tube sheets one and two, and the high-temperature flue gas only contacts the tube body between the tube sheets, and the welding joints between all the heat exchange tubes are on the outside of tube sheet one and tube sheet two, and the welding joints are not in contact with the high-temperature flue gas, which effectively prevents the welding joints from being eroded and worn by the flue gas, thereby providing a guarantee for the safe operation of the equipment. At the same time, the contact layer ensures the sealing of both ends of the tube body, and when the tube-sheet type convection heat exchange tube needs to be disassembled and maintained, the nuts and bolts can be removed to separate the mounting plate one and the mounting plate two, and then the tube sheet one and the tube sheet two can be easily removed to achieve subsequent maintenance and use. The use flexibility of the heat exchange tube is achieved through this setting, and the contact layer ensures the tube sheet one and the tube The contact protection between plate 1 and the tube body, at the same time, when reinstalling tube plate 1 and tube plate 2, the positioning groove and the positioning rod are used in conjunction with tube plate 1 and tube plate 2 for positioning and clamping, which increases the installation convenience of tube plate 1 and tube plate 2. When using tube plate 1 and tube plate 2, the high-temperature flue gas inlet is located at the bottom of the tube body, and the high-temperature flue gas outlet is located at the bottom of the tube body. The tube bodies arranged vertically up and down will cause the upper part of the tube body to block the flue gas transmission effect of the lower part of the tube body. The left guide plate and the right guide plate cooperate with the flue gas to transfer and guide in turn, and the tube body will be located between the left guide plate and the right guide plate. This arrangement facilitates the improvement of the uniformity of contact between the tube body and the flue gas, thereby avoiding the lower tube body being blocked by the upper tube body after the flue gas enters the heat exchanger, resulting in poor heat exchange effect. At the same time, after pulling out the plug rod 1 and the plug rod 2 to disengage them from the slot, the left guide plate and the right guide plate can be pulled out from tube plate 1 and tube plate 2 to achieve single replacement and disassembly.

[0006] The utility model is further configured such that the inlet header is communicated with one end of the pipe body, and the outlet header is communicated with the other end of the pipe body.

[0007] The above technical solution is adopted: the inlet header and the outlet header are used in conjunction with the pipe body respectively.

[0008] The utility model is further configured that the number of the tube bodies is multiple, a high-temperature smoke inlet is formed at the top of the tube body, and a high-temperature smoke outlet is formed at the bottom of the tube body.

[0009] The above technical solution is adopted: the smoke flows through the high-temperature smoke inlet and the high-temperature smoke outlet, thereby transferring heat to the surface of the pipe body.

[0010] The utility model is further configured such that a welding port is formed between two adjacent tube bodies, and the two adjacent tube bodies are welded to each other.

[0011] The above technical solution is adopted: two adjacent pipe bodies are welded and fixed through the welding joint.

[0012] The utility model is further configured that the clamping groove cooperates with the tube body for accommodating and clamping use.

[0013] The above technical solution is adopted: the tube sheet one and the tube sheet two are respectively connected to the tube body through the connecting grooves.

[0014] The utility model is further configured that the interior of the clamping groove is respectively fixedly bonded with a contact layer fixedly connected to the first tube sheet and the second tube sheet.

[0015] The above technical solution is adopted: the sealing of both ends of the pipe body is ensured by the contact layer.

[0016] The utility model is further configured that the contact layer cooperates with the tube body for contact use, and the contact layer is made of rubber material.

[0017] The above technical solution is adopted: the contact protection between the tube sheet 1 and the tube sheet 2 and the tube body is ensured by the contact layer.

[0018] The utility model is further configured that a positioning groove is provided inside the tube plate 2, and the positioning groove cooperates with a positioning rod for positioning and plugging.

[0019] The above technical solution is adopted: the positioning groove and the positioning rod are used to cooperate with the tube sheet one and the tube sheet two for positioning and clamping.

[0020] The utility model is further configured that one end of the bolt passes through the mounting plate one to one side of the mounting plate two, a nut is provided on one side of the mounting plate two, and the nut and the bolt are threadedly connected to each other.

[0021] The above technical solution is adopted: the first mounting plate and the second mounting plate are installed and used by means of bolts, and nuts are used to fasten and install them.

[0022] The utility model is further configured that a rubber ring is fixedly adhered inside the through hole, and the left guide plate and the right guide plate are both provided with slots for respectively cooperating with the first and second insertion rods for insertion.

[0023] The above technical solution is adopted: the through hole cooperates with the left guide plate and the right guide plate to penetrate the tube plate one and the tube plate two respectively, and the slot cooperates with the insertion rod one and the insertion rod two to penetrate the left guide plate and the right guide plate respectively.

[0024] In summary, the utility model has the following beneficial effects:

[0025] 1. In the use of the tube-sheet type convection heat exchange tube of the utility model, the flue gas at the high-temperature flue gas inlet and the high-temperature flue gas outlet circulates, thereby transferring heat to the surface of the tube body, wherein the flue gas is confined between the two groups of tube sheets 1 and 2, and the high-temperature flue gas only contacts the tube body between the tube sheets. The welding joints of all the heat exchange tubes are on the outside of the tube sheets 1 and 2, and the welding joints do not contact the high-temperature flue gas, which effectively prevents the welding joints from being washed and worn by the flue gas, providing a guarantee for the safe operation of the equipment, and at the same time, the contact layer guarantees the sealing of both ends of the tube body;

[0026] 2. When the tube-sheet type convection heat exchange tube needs to be disassembled and maintained, the utility model can separate the mounting plate 1 from the mounting plate 2 by removing the nuts and bolts, and then the tube sheet 1 and the tube sheet 2 can be easily disassembled to achieve subsequent maintenance and use. The heat exchange tube is flexible to use through the arrangement, and the contact layer ensures the contact protection between the tube sheet 1 and the tube sheet 2 and the tube body. At the same time, when the tube sheet 1 and the tube sheet 2 are reinstalled, the positioning groove and the positioning rod are used in conjunction with the tube sheet 1 and the tube sheet 2 for positioning and clamping, which increases the installation convenience of the tube sheet 1 and the tube sheet 2.

[0027] 3. In the use of tube sheet 1 and tube sheet 2 of the utility model, the high-temperature flue gas inlet is located at the bottom of the tube body, and the high-temperature flue gas outlet is located at the bottom of the tube body. The tube bodies arranged vertically up and down will cause the upper part of the tube body to block the flue gas transfer effect of the lower part of the tube body. The left guide plate and the right guide plate cooperate with the flue gas to transfer and guide in turn. The tube body will be located between the left guide plate and the right guide plate. This arrangement facilitates the improvement of the uniformity of the contact between the tube body and the flue gas, thereby avoiding the lower tube body being blocked by the upper tube body after the flue gas enters the heat exchanger, resulting in poor heat exchange effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the structure of tube sheet 1 and tube sheet 2 of the utility model;

[0029] Figure 2 It is a front view schematic diagram of the structure of the utility model;

[0030] Figure 3 It is a schematic side view of the tube sheet 1 and the tube sheet 2 of the utility model;

[0031] Figure 4 The utility model is a side view of a tube plate 1 and a tube plate 2 used in conjunction with a left guide plate and a right guide plate.

[0032] Figure numerals: 1, tube body; 2, inlet header; 3, outlet header; 4, tube sheet one; 5, tube sheet two; 6, welding port; 7, clamping groove; 8, contact layer; 9, positioning rod; 10, positioning groove; 11, mounting plate one; 12, mounting plate two; 13, bolt; 14, nut; 15, high-temperature flue gas inlet; 16, high-temperature flue gas outlet; 17, left guide plate; 18, right guide plate; 19, through hole; 20, rubber ring; 21, plug rod one; 22, plug rod two; 23, slot. DETAILED DESCRIPTION

[0033] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0034] Embodiment 1:

[0035] refer to Figure 1 , Figure 2 and Figure 3 The tube-sheet type convection heat exchange tube comprises a tube body 1, one end of the tube body 1 is provided with an inlet header 2, the other end of the tube body 1 is provided with an outlet header 3, tube sheets 1 4 are provided on both sides of the surface of the tube body 1, and tube sheets 2 5 are provided on the rear side of the tube sheet 1 4. When the tube-sheet type convection heat exchange tube is used, flue gas at the high-temperature flue gas inlet 15 and the high-temperature flue gas outlet 16 flows, thereby transferring heat to the surface of the tube body 1, wherein the flue gas is restricted between two groups of tube sheets 1 4 and tube sheets 2 5, and the high-temperature flue gas contacts the tube body 1 only between the tube sheets. The welding joints 6 for connecting all the heat exchange tubes are on the outside of the tube sheets 1 4 and the tube sheets 2 5, and the welding joints 6 do not contact the high-temperature flue gas, which effectively prevents the welding joints 6 from being eroded by the flue gas and worn, thereby providing a guarantee for the safe operation of the equipment. At the same time, the contact layer 8 ensures the sealing of both ends of the tube body 1.

[0036] refer to Figure 2 The inlet header 2 is connected to one end of the pipe body 1, and the outlet header 3 is connected to the other end of the pipe body 1. The inlet header 2 and the outlet header 3 are used in conjunction with the pipe body 1 respectively.

[0037] refer to Figure 2 A welding port 6 is formed between two adjacent tube bodies 1 , and the two adjacent tube bodies 1 are welded to each other, and the two adjacent tube bodies 1 are welded and fixed through the welding port 6 .

[0038] Brief description of the use process: In the use of the tube-sheet type convection heat exchange tube, the inlet header 2 and the outlet header 3 are used in conjunction with the tube body 1 respectively, and the flue gas at the high-temperature flue gas inlet 15 and the high-temperature flue gas outlet 16 circulates, thereby transferring heat to the surface of the tube body 1, wherein the flue gas is restricted between the two groups of tube sheets 1 4 and tube sheets 2 5, and the high-temperature flue gas only contacts the tube body 1 between the tube sheets. The welding joints 6 butt-jointed between all heat exchange tubes are on the outside of the tube sheet 1 and the tube sheet 2 5, and the welding joints 6 do not contact the high-temperature flue gas, effectively preventing the welding joints 6 from being eroded by the flue gas and worn, thereby providing a guarantee for the safe operation of the equipment. At the same time, the contact layer 8 ensures the sealing of both ends of the tube body 1.

[0039] Embodiment 2:

[0040] refer to Figure 1 , Figure 2 and Figure 3 , a tube-sheet type convection heat exchange tube comprises a tube body 1, and the opposite surfaces of tube sheet one 4 and tube sheet two 5 are provided with a clamping groove 7, a positioning rod 9 is fixedly installed on one side of the tube body 1, and the two ends of one side of the tube sheet one 4 and tube sheet two 5 are respectively fixedly installed with a mounting plate one 11 and a mounting plate two 12, and a bolt 13 is provided on one side of the mounting plate one 11. When it is necessary to disassemble and maintain the tube-sheet type convection heat exchange tube, the mounting plate one 11 and the mounting plate two 12 can be separated by disassembling the nut 14 and the bolt 13, and then the tube sheet one 4 and the tube sheet two 5 can be easily disassembled to realize subsequent maintenance and use. Through the flexibility of the use of the heat exchange tube, the contact layer 8 ensures the contact protection between the tube sheet one 4 and the tube sheet two 5 and the tube body 1. At the same time, when the tube sheet one 4 and the tube sheet two 5 are reinstalled, the positioning groove 10 and the positioning rod 9 cooperate with the tube sheet one 4 and the tube sheet two 5 for positioning and clamping, which increases the installation convenience of the tube sheet one 4 and the tube sheet two 5.

[0041] refer to Figure 2 The clamping groove 7 cooperates with the tube body 1 to accommodate and clamp it, and the clamping groove 7 cooperates with the tube sheet 1 4 and the tube sheet 2 5 to clamp it with the tube body 1 respectively.

[0042] refer to Figure 3 A contact layer 8 fixedly connected to the tube sheet 1 4 and the tube sheet 2 5 is respectively fixedly bonded inside the clamping groove 7, and the sealing of the two ends of the tube body 1 is ensured by the contact layer 8.

[0043] refer to Figure 3 The contact layer 8 is used in contact with the tube body 1 and is made of rubber. The contact layer 8 ensures the contact protection between the tube sheet 1 4 and the tube sheet 2 5 and the tube body 1 .

[0044] refer to Figure 3A positioning groove 10 is provided inside the tube sheet 2 5 , and the positioning groove 10 cooperates with the positioning rod 9 for positioning and plugging. The positioning groove 10 and the positioning rod 9 cooperate with the tube sheet 1 4 and the tube sheet 2 5 for positioning and plugging.

[0045] refer to Figure 2 One end of the bolt 13 passes through the mounting plate 11 to one side of the mounting plate 2 12, and a nut 14 is provided on one side of the mounting plate 2 12. The nut 14 and the bolt 13 are threadedly connected to each other. The bolt 13 is used to cooperate with the mounting plate 1 11 and the mounting plate 2 12 for installation and use, and the nut 14 is used to cooperate with the nut 14 for fastening and installation.

[0046] Brief description of the use process: When the tube-sheet type convection heat exchange tube needs to be disassembled for maintenance, the nuts 14 and bolts 13 can be removed to separate the mounting plate 11 from the mounting plate 2 12, and then the tube sheet 1 4 and the tube sheet 2 5 can be easily removed to achieve subsequent maintenance and use. The use flexibility of the heat exchange tube is improved by setting this configuration, and the contact layer 8 ensures the contact protection between the tube sheet 1 4 and the tube sheet 2 5 and the tube body 1. At the same time, when the tube sheet 1 4 and the tube sheet 2 5 are reinstalled, the positioning groove 10 and the positioning rod 9 cooperate with the tube sheet 1 4 and the tube sheet 2 5 for positioning and clamping, which increases the installation convenience of the tube sheet 1 4 and the tube sheet 2 5.

[0047] Embodiment 3:

[0048] refer to Figure 1 , Figure 2 and Figure 4 The tube sheet type convection heat exchange tube comprises a tube body 1, a left guide plate 17 is penetrated in the interior of the tube sheet 1 4, a right guide plate 18 is penetrated in the interior of the tube sheet 2 5, and through holes 19 are provided in the interiors of the tube sheet 1 4 and the tube sheet 2 5 for respectively penetrating the left guide plate 17 and the right guide plate 18, a plug rod 1 21 is provided on the top of the left guide plate 17 and penetrates to the bottom of the left guide plate 17, and a plug rod 22 is provided on the top of the right guide plate 18 and penetrates to the bottom of the right guide plate 18. When the tube sheet 1 and the tube sheet 2 are used, the high temperature flue gas inlet 15 is located at the tube body 1, and the high-temperature flue gas outlet 16 is located at the bottom of the tube body 1. The tube bodies 1 arranged vertically up and down will cause the upper tube body 1 to block the flue gas transmission effect of the lower tube body 1. The left guide plate 17 and the right guide plate 18 cooperate with the flue gas to transfer and guide in turn. The tube body 1 will be located between the left guide plate 17 and the right guide plate 18. This arrangement is convenient for improving the uniformity of the contact between the tube body 1 and the flue gas, thereby preventing the lower tube body 1 from being blocked by the upper tube body 1 after the flue gas enters the heat exchanger, resulting in a poor heat exchange effect.

[0049] refer to Figure 2 ,refer to Figure 1There are multiple tube bodies 1 , a high-temperature flue gas inlet 15 is formed at the top of the tube body 1 , and a high-temperature flue gas outlet 16 is formed at the bottom of the tube body 1 . Flue gas flows through the high-temperature flue gas inlet 15 and the high-temperature flue gas outlet 16 , thereby transferring heat to the surface of the tube body 1 .

[0050] refer to Figure 4 The inside of the through hole 19 is fixedly bonded with a rubber ring 20. The left guide plate 17 and the right guide plate 18 are provided with slots 23 respectively used for plugging with the first plug rod 21 and the second plug rod 22. The left guide plate 17 and the right guide plate 18 penetrate the tube plate 1 4 and the second tube plate 5 respectively through the through hole 19. The slots 23 penetrate the left guide plate 17 and the right guide plate 18 respectively with the first plug rod 21 and the second plug rod 22.

[0051] Brief description of the use process: When using tube sheet one and tube sheet two, the high-temperature flue gas inlet 15 is located at the bottom of the tube body 1, and the high-temperature flue gas outlet 16 is located at the bottom of the tube body 1. The tube bodies 1 arranged vertically up and down will cause the upper part of the tube body 1 to block the flue gas transmission effect of the lower part of the tube body 1. The left guide plate 17 and the right guide plate 18 cooperate with the flue gas to transfer and guide in turn. The tube body 1 will be located between the left guide plate 17 and the right guide plate 18. This arrangement facilitates the improvement of the uniformity of the contact between the tube body 1 and the flue gas, thereby preventing the lower tube body 1 from being blocked by the upper tube body 1 after the flue gas enters the heat exchanger, resulting in poor heat exchange effect. At the same time, after pulling out the plug rod 1 21 and the plug rod 2 22 to disengage them from the slot 23, the left guide plate 17 and the right guide plate 18 can be pulled out from the tube sheet 1 4 and the tube sheet 2 5 to achieve single replacement and disassembly.

[0052] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A tube-sheet type convection heat exchange tube, comprising a tube body (1), characterized in that: An inlet header (2) is provided at one end of the tube body (1), and an outlet header (3) is provided at the other end of the tube body (1). Tube sheets (4) are provided on both sides of the surface of the tube body (1). Tube sheets (5) are provided on the rear side of the tube sheets (4). The opposing surfaces of the tube sheets (4) and the tube sheets (5) are provided with clamping grooves (7). A positioning rod (9) is fixedly installed on one side of the tube body (1). The two ends of one side of the tube sheets (4) and the tube sheets (5) are respectively fixedly installed with mounting plates (11) and (12). A bolt (13) is provided on one side of the tube sheet (11), a left guide plate (17) is passed through the interior of the tube sheet (4), a right guide plate (18) is passed through the interior of the tube sheet (5), and through holes (19) are provided in the interiors of the tube sheet (4) and the tube sheet (5) for respectively passing through the left guide plate (17) and the right guide plate (18), a plug rod (21) is provided at the top of the left guide plate (17) and passes through the bottom of the left guide plate (17), and a plug rod (22) is provided at the top of the right guide plate (18) and passes through the bottom of the right guide plate (18).

2. The tube sheet type convection heat exchange tube according to claim 1, characterized in that: The inlet header (2) is in communication with one end of the pipe body (1), and the outlet header (3) is in communication with the other end of the pipe body (1).

3. The tube-sheet type convection heat exchange tube according to claim 1, characterized in that: The number of the tube bodies (1) is multiple, a high-temperature flue gas inlet (15) is formed at the top of the tube body (1), and a high-temperature flue gas outlet (16) is formed at the bottom of the tube body (1).

4. The tube sheet type convection heat exchange tube according to claim 1, characterized in that: A welding port (6) is formed between two adjacent tube bodies (1), and the two adjacent tube bodies (1) are welded to each other.

5. The tube-sheet type convection heat exchange tube according to claim 1, characterized in that: The clamping groove (7) cooperates with the tube body (1) for receiving and clamping.

6. The tube-sheet type convection heat exchange tube according to claim 1, characterized in that: A contact layer (8) fixedly connected to the first tube sheet (4) and the second tube sheet (5) is respectively fixedly bonded to the inside of the clamping groove (7).

7. The tube-sheet type convection heat exchange tube according to claim 6, characterized in that: The contact layer (8) cooperates with the tube body (1) for contact use, and the contact layer (8) is made of rubber.

8. The tube-sheet type convection heat exchange tube according to claim 1, characterized in that: A positioning groove (10) is provided inside the second tube plate (5), and the positioning groove (10) cooperates with the positioning rod (9) for positioning and plugging.

9. The tube-sheet type convection heat exchange tube according to claim 1, characterized in that: One end of the bolt (13) passes through the mounting plate 1 (11) to one side of the mounting plate 2 (12); a nut (14) is provided on one side of the mounting plate 2 (12); the nut (14) and the bolt (13) are threadedly connected to each other.

10. The tube sheet type convection heat exchange tube according to claim 9, characterized in that: A rubber ring (20) is fixedly bonded inside the through hole (19), and the left guide plate (17) and the right guide plate (18) are both provided with slots (23) for respectively cooperating with the first insertion rod (21) and the second insertion rod (22) for insertion.