A shell-and-tube heat exchanger facilitating assembly

Abstract

The present invention discloses a shell-and-tube heat exchanger convenient for assembly, belonging to the technical field of shell-and-tube heat exchangers, which includes a heat exchanger housing and a docking pipe. A clamping assembly is arranged between the heat exchanger housing and the docking pipe; a sliding plate is slidably arranged inside the upper connecting plate; a cleaning assembly is arranged on the surface of the sliding plate, and the cleaning assembly includes a brush plate inserted and connected inside the sliding plate. For this shell-and-tube heat exchanger convenient for assembly, when the docking pipe needs to be installed on the heat exchanger housing, the overlapping plate is aligned with the outer plate and the cross bar, and the docking pipe is inserted into the heat exchanger housing. At this time, the limit block will be pushed by the overlapping plate and move in the direction of squeezing the first spring. After the positioning plate contacts the heat exchanger housing, the limit block pops out under the action of the first spring. At this time, the docking pipe is installed on the heat exchanger housing under the action of the positioning plate and the limit block. The operation process is fast and convenient, with high work efficiency, and no additional disassembly and assembly tools are required.

Description

Technical Field

[0001] The present invention relates to the technical field of shell-and-tube heat exchangers, and particularly to a shell-and-tube heat exchanger that is convenient for assembly. Background Art

[0002] During industrial production processes, a large amount of high-temperature waste heat fluid is generated. If these waste heat fluids are directly discharged, a large amount of thermal energy will be wasted. Therefore, shell-and-tube heat exchangers need to be used. A shell-and-tube heat exchanger is a common chemical engineering equipment. When it works, it mainly plays the role of heat exchange between two different temperatures, so that the heat can be absorbed and then used in other places, such as heating the domestic water in the factory area. When assembling a shell-and-tube heat exchanger, workers need to carry a lot of disassembly and assembly tools. If workers forget to carry the special disassembly and assembly tools, the assembly process of the shell-and-tube heat exchanger will be complicated, which will bring unnecessary trouble to the assembly process.

[0003] In order to overcome the above defects, the prior art 1 (a Chinese patent application with the application number 202222767825.9 and the application date of October 20, 2022) is a shell-and-tube heat exchanger that is convenient for assembly. When it works, the shell is fixedly installed in the fixed ring, and the bearing installed in the fixed ring is used to rotate it, so that the orientations of the first joint, the second joint, the third joint, and the fourth joint can be adjusted. According to the positions of the pipelines connected in different directions, it can be rotated and adjusted. Its rotation adjustment structure is simple and convenient for workers to operate, achieving the effect of improving practicability. The prior art 2 (a Chinese patent application with the application number 202210693871.0 and the application date of June 19, 2022) is a rapid assembly tooling and assembly method for the tube core of a shell-and-tube heat exchanger. When it works, several movable brackets are arranged above the bracket and the slideway. The movable brackets can respectively install, adjust, and fix the front tube sheet of the heat exchanger and the baffle of the heat exchanger. After the tube passing is completed, the hydraulic group is used to make the heat exchanger cylinder body and the heat exchanger tube core concentric through the adjustable roller rack. Through the traction of the manual hoist or the winch, the movable bracket is used to support the heat exchanger tube core and translate it step by step into the heat exchanger cylinder body. The present invention can greatly improve the assembly efficiency, reduce the labor intensity, avoid the waste of auxiliary materials and welding materials, avoid using the overhead crane as the power device, and avoid potential safety hazards.

[0004] However, after the shell-and-tube heat exchanger is used for a long time, scale will form on the outer shell of the heat exchanger. These scales will affect the subsequent disassembly process. In the process of using the heat exchanger in the above application, there is no auxiliary disassembly structure, which will affect the disassembly of the heat exchanger by the staff, resulting in a decrease in work efficiency. At the same time, after being used for a long time, a large amount of dust will accumulate on the surface of the outer shell of the heat exchanger. These dusts will affect the heat transfer efficiency and destroy the convection. In the process of using the heat exchanger in the above application, there is no surface self-cleaning structure, which reduces the work efficiency of the heat exchanger. Summary of the Invention

[0005] The purpose of the present invention is to provide a shell-and-tube heat exchanger that is easy to assemble, so as to solve the problems raised in the above background technology that in the process of use, there is no auxiliary disassembly structure, which will affect the disassembly of the heat exchanger by the staff, resulting in a decrease in work efficiency, and in the process of use, there is no surface self-cleaning structure, which reduces the work efficiency of the heat exchanger.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A shell-and-tube heat exchanger that is easy to assemble, including a heat exchanger outer shell and a docking pipe. A clamping component is arranged between the heat exchanger outer shell and the docking pipe, and the heat exchanger outer shell and the docking pipe are connected through the clamping component. And an upper connection plate is fixedly connected to the upper surface of the heat exchanger outer shell. And the clamping component includes a fixing plate fixedly connected to the surface of the heat exchanger outer shell; a sliding plate is slidably arranged inside the upper connection plate; a cleaning component is arranged on the surface of the sliding plate. The cleaning component includes a brush plate inserted and connected inside the sliding plate. When the cleaning component works, it sweeps the dust away from the heat exchanger outer shell; a cleaning component is arranged between the sliding plate and the upper connection plate. And the cleaning component includes an airbag adhered to the upper surface of the upper connection plate, and a spray head is arranged on the surface of the airbag. When the cleaning component works, it blows the dust away from the heat exchanger outer shell.

[0007] Preferably, the clamping component further includes a lapping plate fixedly connected to the outer surface of the docking pipe, and the diameter of the docking pipe is smaller than the diameter of the heat exchanger outer shell. An outer plate is fixedly connected to the surface of the fixing plate.

[0008] Preferably, limit blocks are slidably arranged on both the upper and lower sides of the outer plate, and the surface of the limit block is inclined, and the outer plates are symmetrically distributed on the front and rear sides of the fixing plate.

[0009] Preferably, a positioning plate is fixedly connected to the outer wall of the docking pipe, a guiding rod is fixedly connected to the inner wall of the outer plate, and the end of the guiding rod is movably arranged inside the limit block.

[0010] Preferably, a first spring that plays an elastic reset role is fixedly connected to the surface of the limit block, and the other side of the first spring is fixedly connected to the inner wall of the outer plate.

[0011] Preferably, a working rod is fixedly connected to the surface of the limiting block, and the front view of the working rod is an inverted "L" structure, and the end of the working rod is located outside the outer plate. A cross bar is fixedly connected to the surface of the fixing plate, and the cross bars are symmetrically distributed on the upper and lower sides of the fixing plate, and a movable plate is sleeved and connected to the surface of the cross bar. A second spring for elastic reset is fixedly connected to the surface of the movable plate, and the other side of the second spring is fixedly connected to the surface of the fixing plate.

[0012] Preferably, the front view of the upper connecting plate is an inverted "U" shape. The cleaning assembly further includes a long pin fixedly connected to the inner wall of the upper connecting plate, and a motor is bolted to the outer surface of the left side of the upper connecting plate, and a bidirectional threaded rod is fixedly connected to the output end of the motor.

[0013] Preferably, a slide plate is bolted to the surface of the bidirectional threaded rod. A plug plate is movably connected to the upper surface of the brush plate, and the plug plate is inserted into the slide plate.

[0014] Preferably, the cleaning assembly further includes a column slidably disposed inside the upper connecting plate. A stress plate is fixedly connected to the lower surface of the column, and a second magnet is fixedly connected to the lower surface of the stress plate. A first magnet is fixedly connected to the upper surface of the slide plate, and the magnetic pole on the upper surface of the first magnet is opposite to the magnetic pole on the lower surface of the second magnet, and the second magnets are equally spaced on the lower surface of the stress plate. The upper end of the column is fixedly connected to a pressing plate, and the lower surface of the pressing plate is attached to the upper surface of the airbag. Air inlet pipes are fixedly connected to both the left and right sides of the airbag. Air outlet pipes are fixedly connected to both the front and rear surfaces of the airbag, and the end of the air outlet pipe is fixedly connected to a nozzle, and the nozzle is arranged vertically downward. Check valves are fixedly connected to the surfaces of both the air outlet pipe and the air inlet pipe.

[0015] Preferably, a bracket is fixedly connected to the lower surface of the heat exchanger housing, and an inner plate is fixedly connected between adjacent brackets. Upper connecting blocks are fixedly connected to the upper surface of the inner plate at equal intervals. An inner block is fixedly connected to the upper surface of the brush plate, and a lower connecting block is fixedly connected to the lower surface of the brush plate. The surfaces of both the lower connecting block and the upper connecting block are inclined. An inner rod is fixedly connected to the inner wall of the plug plate, and the inner rod passes through the inner block.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: By adopting a new structural design and providing a docking pipe that can be quickly assembled and disassembled, the overall device can be quickly assembled. Not only does it not require workers to carry additional disassembly and assembly tools, but also the diameter of the docking pipe is smaller than that of the heat exchanger housing, ensuring that there is no leakage when the internal material flows. In addition, to prevent the working efficiency of the heat exchanger housing from decreasing, a brush plate and a nozzle for cleaning dust are provided. When the brush plate works, it can clean the dust, and when the nozzle works, it can blow away the dust, enabling better cleaning of impurities and dust and improving the efficiency. The specific content is as follows:

[0017] For this easily assembled shell-and-tube heat exchanger, when the docking pipe needs to be installed on the heat exchanger housing, align the overlapping plate with the outer plate and the cross bar, and insert the docking pipe into the interior of the heat exchanger housing. At this time, the limiting block will be pushed by the overlapping plate and move in the direction of compressing the first spring. After the positioning plate contacts the heat exchanger housing, the limiting block pops out under the action of the first spring. At this time, the docking pipe is installed on the heat exchanger housing under the action of the positioning plate and the limiting block. The operation process is fast and convenient, with high work efficiency, and no additional disassembly and assembly tools are required.

[0018] Furthermore, after long-term use, when the docking pipe needs to be removed, the working rod can be pressed to drive the limiting block to move into the interior of the outer plate. When the end of the limiting block completely enters the outer plate, the docking pipe and the overlapping plate can be removed. The operation steps of the disassembly process are simple and the work efficiency is high.

[0019] Even further, during the movement of the limiting block, the guiding rod enables the limiting block to move only in the vertical direction. The guiding rod ensures the stability of the movement of the limiting block. At the same time, the diameter of the docking pipe is smaller than that of the heat exchanger housing, ensuring that there is no leakage when the internal material flows.

[0020] For this easily assembled shell-and-tube heat exchanger, during the installation of the docking pipe, the movable plate will slide on the surface of the cross bar, and at this time, the second spring will be compressed. That is, after the docking pipe is installed, the second spring is always in a compressed state. Then, during the disassembly process, the second spring will push the movable plate, causing the movable plate to push the overlapping plate. At this time, the second spring and the movable plate play a role in assisting disassembly, facilitating the workers to quickly remove the docking pipe.

[0021] For this easily assembled shell-and-tube heat exchanger, during the operation of the heat exchanger housing and the docking pipe, the motor works intermittently. When the motor rotates, the motor drives the slide plate to perform a reciprocating linear motion inside the upper connecting plate through the bidirectional threaded rod and the long pin. At this time, the slide plate drives the brush plate to move synchronously. Thus, the brush plate can clean the surface of the heat exchanger housing, preventing dust from adhering, and thus avoiding the generation of scale, ensuring the heat conduction efficiency of the heat exchanger housing.

[0022] Furthermore, after the brush plate has been used for a long time, it needs to be cleaned. At this time, the plug-in plate can be directly pulled out from the inside of the skateboard. After cleaning the brush plate, the plug-in plate can be inserted into the inside of the skateboard. The replacement process is simple and the working efficiency of the brush plate is guaranteed.

[0023] In the shell-and-tube heat exchanger which is easy to assemble, the first magnet will intermittently approach the second magnet during the movement of the slide plate. At this time, the force-bearing plate, the column and the pressure plate will make reciprocating linear motion in the vertical direction under the action of the mutual magnetic force and the thrust of the airbag expansion. Then, the airbag will be intermittently squeezed, that is, the airbag will be intermittently blown through the nozzle. The nozzle cooperates with the brush plate to better clean impurities and dust, thereby improving efficiency.

[0024] Furthermore, when the air bag, the air inlet pipe and the air outlet pipe are working, the one-way valve makes the air flow direction from the air inlet pipe to the nozzle, and the one-way valve ensures the normal operation of the air bag and the nozzle.

[0025] Furthermore, during the movement of the brush plate, the lower connecting block on the lower surface of the brush plate will intermittently contact the upper connecting block on the upper surface of the inner plate, and then the brush plate slides inside the plug plate under the thrust between the lower connecting block and the upper connecting block, and the action of the inner block and the inner rod. At this time, the brush plate can better clean the surface of the heat exchanger shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the connection structure between the heat exchanger housing and the butt-joint pipe of the present invention;

[0027] Figure 2 This is a schematic diagram of the connection structure between the heat exchanger housing and the fixing plate of the present invention;

[0028] Figure 3 This is a schematic diagram of the connection structure between the butt-jointed pipe and the positioning plate of the present invention;

[0029] Figure 4 This is a schematic diagram of the outer plate distribution structure of the present invention;

[0030] Figure 5 This is a schematic structural diagram of the outer plate in a cutaway state of the present invention;

[0031] Figure 6 For the present invention Figure 5 A in the middle is an enlarged structural diagram;

[0032] Figure 7 This is a schematic diagram of the connection structure between the upper connecting plate and the motor of the present invention;

[0033] Figure 8 This is a schematic diagram of the connection structure between the slide plate and the first magnet of the present invention;

[0034] Figure 9Schematic diagram of the nozzle distribution state structure of the present invention;

[0035] Figure 10 Schematic diagram of the connection structure between the inner plate and the upper connecting block of the present invention;

[0036] Figure 11 Schematic diagram of the sectional structure of the insertion plate of the present invention.

[0037] In the figure: 1. Heat exchanger housing; 2. Docking pipe; 3. Fixed plate; 4. Lapping plate; 5. Positioning plate; 6. Outer plate; 7. Limiting block; 8. Working rod; 9. First spring; 10. Guide rod; 11. Cross bar; 12. Movable plate; 13. Second spring; 14. Upper connecting plate; 15. Motor; 16. Bidirectional threaded rod; 17. Long pin; 18. Slide plate; 19. Brush plate; 20. Insertion plate; 21. First magnet; 22. Force-bearing plate; 23. Second magnet; 24. Pressing plate; 25. Air bag; 26. Column; 27. Intake pipe; 28. Exhaust pipe; 29. Nozzle; 30. Check valve; 31. Inner plate; 32. Upper connecting block; 33. Lower connecting block; 34. Inner block; 35. Inner rod. Detailed implementation manners

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0039] The present invention provides the following technical solutions: A shell-and-tube heat exchanger that is easy to assemble, as Figures 1-9 shown, includes a heat exchanger housing 1 and a docking pipe 2. A clamping component is arranged between the heat exchanger housing 1 and the docking pipe 2, and the heat exchanger housing 1 and the docking pipe 2 are connected through the clamping component. Moreover, an upper connecting plate 14 is fixedly connected to the upper surface of the heat exchanger housing 1, and the clamping component includes a fixed plate 3 fixedly connected to the surface of the heat exchanger housing 1. The clamping component further includes a lapping plate 4 fixedly connected to the outer surface of the docking pipe 2, and the diameter of the docking pipe 2 is smaller than the diameter of the heat exchanger housing 1. An outer plate 6 is fixedly connected to the surface of the fixed plate 3.

[0040] Limiting blocks 7 are slidably arranged on both the upper and lower sides of the outer plate 6, and the surface of the limiting block 7 is inclined. Moreover, the outer plates 6 are symmetrically distributed on the front and rear sides of the fixed plate 3. A positioning plate 5 is fixedly connected to the outer wall of the docking pipe 2. A guide rod 10 is fixedly connected to the inner wall of the outer plate 6, and the end of the guide rod 10 is movably arranged inside the limiting block 7. A first spring 9 that plays an elastic reset role is fixedly connected to the surface of the limiting block 7, and the other side of the first spring 9 is fixedly connected to the inner wall of the outer plate 6.

[0041] When the docking pipe 2 needs to be installed on the heat exchanger housing 1, align the overlapping plate 4 with the outer plate 6 and the cross bar 11, and insert the docking pipe 2 into the interior of the heat exchanger housing 1. At this time, the limit block 7 will be pushed by the overlapping plate 4 and move in the direction of compressing the first spring 9 (the guide rod 10 enables the limit block 7 to move only in the vertical direction). After the positioning plate 5 contacts the heat exchanger housing 1, the limit block 7 pops out under the action of the first spring 9. At this time, the docking pipe 2 is stuck on the heat exchanger housing 1 under the action of the positioning plate 5 and the limit block 7. The operation process is fast and convenient. After long-term use, when the docking pipe 2 needs to be removed, the working rod 8 can be pressed to drive the limit block 7 to move into the interior of the outer plate 6. When the end of the limit block 7 completely enters the outer plate 6, the docking pipe 2 and the overlapping plate 4 can be removed. The operation steps of the disassembly process are simple, the work efficiency is high, and the diameter of the docking pipe 2 is smaller than that of the heat exchanger housing 1, ensuring that there is no leakage when the internal material flows.

[0042] At the same time, through the arranged movable plate 12 and the second spring 13, it plays an auxiliary disassembly role. The surface of the limit block 7 is fixedly connected with the working rod 8, and the front view of the working rod 8 is an inverted "L" structure, and the end of the working rod 8 is located outside the outer plate 6. The surface of the fixed plate 3 is fixedly connected with the cross bar 11, and the cross bar 11 is symmetrically distributed on the upper and lower sides of the fixed plate 3, and the surface of the cross bar 11 is sleeved and connected with the movable plate 12. The surface of the movable plate 12 is fixedly connected with the second spring 13 that plays an elastic reset role, and the other side of the second spring 13 is fixedly connected with the surface of the fixed plate 3.

[0043] During the installation process of the docking pipe 2, the movable plate 12 will slide on the surface of the cross bar 11. At this time, the second spring 13 will be compressed, that is, after the docking pipe 2 is installed, the second spring 13 is always in a compressed state. Furthermore, during the disassembly process, the second spring 13 will push the movable plate 12, causing the movable plate 12 to push the overlapping plate 4. At this time, the second spring 13 and the movable plate 12 play an auxiliary disassembly role, facilitating the staff to quickly remove the docking pipe 2, and preventing the situation that the docking pipe 2 and the heat exchanger housing 1 are inconvenient to remove due to dust adhesion after long-term use.

[0044] In addition, through the provided cleaning component, the brush plate 19 can clean the outer wall of the heat exchanger housing 1. A sliding plate 18 is slidably arranged inside the upper connecting plate 14; a cleaning component is arranged on the surface of the sliding plate 18. The cleaning component includes a brush plate 19 inserted and connected inside the sliding plate 18. When the cleaning component works, it sweeps the dust away from the heat exchanger housing 1. The front view of the upper connecting plate 14 is an inverted "U" shape. The cleaning component further includes a long pin 17 fixedly connected to the inner wall of the upper connecting plate 14. And a motor 15 is bolted to the left outer surface of the upper connecting plate 14. And the output end of the motor 15 is fixedly connected with a bidirectional threaded rod 16. The surface of the bidirectional threaded rod 16 is bolted with the sliding plate 18. The upper surface of the brush plate 19 is movably connected with an insertion plate 20, and the insertion plate 20 is inserted and connected inside the sliding plate 18.

[0045] During the working process of the heat exchanger housing 1 and the docking pipe 2, the motor 15 works intermittently. When the motor 15 rotates, the motor 15 drives the sliding plate 18 to make a reciprocating linear motion inside the upper connecting plate 14 through the bidirectional threaded rod 16 and the long pin 17. At this time, the sliding plate 18 drives the brush plate 19 to move synchronously. Furthermore, the brush plate 19 can clean the surface of the heat exchanger housing 1, preventing dust from adhering, and thus avoiding the generation of scale. After the brush plate 19 has been used for a long time, it is necessary to clean the brush plate 19. At this time, the insertion plate 20 can be directly pulled out from inside the sliding plate 18. After cleaning the brush plate 19, the insertion plate 20 can be inserted back into the sliding plate 18. The replacement process is simple, ensuring the working efficiency of the brush plate 19. In addition, during the movement of the brush plate 19, the lower connecting block 33 on the lower surface of the brush plate 19 will intermittently contact the upper connecting block 32 on the upper surface of the inner plate 31. When the lower connecting block 33 contacts the upper connecting block 32, the brush plate 19 is pushed to rotate (the inner block 34 and the inner rod 35 ensure the stability of the rotation of the brush plate 19 and prevent the brush plate 19 from falling). When the lower connecting block 33 and the upper connecting block 32 are not in contact, the brush plate 19 rotates under its own gravity. Furthermore, the brush plate 19 reciprocates inside the insertion plate 20. At this time, the brush plate 19 can better clean the surface of the heat exchanger housing 1.

[0046] Moreover, a cleaning component is provided, which can blow air onto the surface of the heat exchanger housing 1 through the nozzle 29 to facilitate the rapid cleaning of dust. A cleaning component is arranged between the sliding plate 18 and the upper connecting plate 14. The cleaning component includes an airbag 25 adhered to the upper surface of the upper connecting plate 14, and a nozzle 29 is arranged on the surface of the airbag 25. When the cleaning component works, the dust is blown away from the heat exchanger housing 1. The cleaning component further includes a column 26 slidably arranged inside the upper connecting plate 14, and a stress plate 22 is fixedly connected to the lower surface of the column 26. A second magnet 23 is fixedly connected to the lower surface of the stress plate 22. A first magnet 21 is fixedly connected to the upper surface of the sliding plate 18, and the magnetic pole on the upper surface of the first magnet 21 is opposite to the magnetic pole on the lower surface of the second magnet 23. The second magnets 23 are equally spaced on the lower surface of the stress plate 22. The upper end of the column 26 is fixedly connected to a pressing plate 24, and the lower surface of the pressing plate 24 is in contact with the upper surface of the airbag 25. Air inlet pipes 27 are fixedly connected to both the left and right sides of the airbag 25, and air outlet pipes 28 are fixedly connected to both the front and back surfaces of the airbag 25. The end of the air outlet pipe 28 is fixedly connected to the nozzle 29, and the nozzle 29 is arranged vertically downward. Check valves 30 are fixedly connected to the surfaces of the air outlet pipes 28 and the air inlet pipes 27.

[0047] During the movement of the sliding plate 18, the first magnet 21 will intermittently approach the second magnet 23. When the first magnet 21 approaches the second magnet 23, the stress plate 22 descends under the action of the mutual attraction magnetic force. At this time, the stress plate 22 drives the pressing plate 24 to descend synchronously through the column 26. At this time, the airbag 25 is squeezed by the pressing plate 24. When the first magnet 21 moves away from the second magnet 23, the airbag 25 expands. At this time, the airbag 25 pushes the pressing plate 24 and the stress plate 22 to rise. Repeating the above process, at this time, the stress plate 22, the column 26 and the pressing plate 24 perform reciprocating linear motion in the vertical direction under the action of the mutual attraction magnetic force and the expansion thrust of the airbag 25. Furthermore, the airbag 25 will be intermittently squeezed. When the airbag 25 is squeezed, air is blown through the air outlet pipe 28 and the nozzle 29. When the airbag 25 expands, the airbag 25 intakes air through the air inlet pipe 27. When the nozzle 29 blows air, it plays a role in blowing away dust. Furthermore, during operation, after the dust is swept down by the brush plate 19, the nozzle 29 can directly blow away the dust. That is, under the combined action of the brush plate 19 and the nozzle 29, impurities and dust can be better cleaned, improving the efficiency. In addition, when the airbag 25, the air inlet pipe 27 and the air outlet pipe 28 work, the check valve 30 makes the flow direction of the air flow from the air inlet pipe 27 to the nozzle 29, and the check valve 30 ensures the normal operation of the airbag 25 and the nozzle 29.

[0048] The above is the working process of the entire device, and the content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

Claims

1. A shell-and-tube heat exchanger facilitating assembly, comprising a heat exchanger housing and a docking pipe. A clamping assembly is arranged between the heat exchanger housing and the docking pipe, and the heat exchanger housing and the docking pipe are connected through the clamping assembly. Moreover, an upper connection plate is fixedly connected to the upper surface of the heat exchanger housing. The clamping assembly includes a fixing plate fixedly connected to the surface of the heat exchanger housing; It is characterized in that: A sliding plate is slidably arranged inside the upper connection plate; a cleaning assembly is arranged on the surface of the sliding plate. The cleaning assembly includes a brush plate inserted and connected inside the sliding plate. When the cleaning assembly works, it sweeps the dust away from the heat exchanger housing; A cleaning component is arranged between the sliding plate and the upper connection plate. The cleaning component includes an air bag adhered to the upper surface of the upper connection plate, and a nozzle is arranged on the surface of the air bag. When the cleaning component works, it blows the dust away from the heat exchanger housing; The cleaning component further includes a column slidably arranged inside the upper connection plate. A stress plate is fixedly connected to the lower surface of the column, and a second magnet is fixedly connected to the lower surface of the stress plate. Moreover, a first magnet is fixedly connected to the upper surface of the sliding plate, and the magnetic pole on the upper surface of the first magnet is opposite to the magnetic pole on the lower surface of the second magnet. The second magnets are equally spaced on the lower surface of the stress plate. The upper end of the column is fixedly connected to a pressing plate, and the lower surface of the pressing plate is in contact with the upper surface of the air bag. Air inlet pipes are fixedly connected to both the left and right sides of the air bag. Nozzles are fixedly connected to both the front and back surfaces of the air bag, and the end of the nozzle is fixedly connected to a nozzle which is arranged vertically downward. Check valves are fixedly connected to the surfaces of both the air outlet pipe and the air inlet pipe; An insertion plate is movably connected to the upper surface of the brush plate, and the insertion plate is inserted and connected inside the sliding plate. A support is fixedly connected to the lower surface of the heat exchanger housing, and an inner plate is fixedly connected between adjacent supports. Moreover, upper connection blocks are equally spaced and fixedly connected to the upper surface of the inner plate. An inner block is fixedly connected to the upper surface of the brush plate, and a lower connection block is fixedly connected to the lower surface of the brush plate. The surfaces of both the lower connection block and the upper connection block are inclined. An inner rod is fixedly connected to the inner wall of the insertion plate, and the inner rod penetrates through the inside of the inner block.

2. The shell and tube heat exchanger according to claim 1, which is convenient for assembly, is characterized in that: The clamping assembly further includes a lapping plate fixedly connected to the outer surface of the docking pipe, and the diameter of the docking pipe is smaller than that of the heat exchanger housing. An outer plate is fixedly connected to the surface of the fixing plate.

3. The shell-and-tube heat exchanger according to claim 2, characterized in that: Limit blocks are slidably arranged on both the upper and lower sides of the outer plate. The surface of the limit block is inclined, and the outer plates are symmetrically distributed on the front and back sides of the fixing plate.

4. The shell and tube heat exchanger convenient for assembly according to claim 3, wherein: A positioning plate is fixedly connected to the outer wall of the docking pipe. A guiding rod is fixedly connected to the inner wall of the outer plate, and the end of the guiding rod is movably arranged inside the limit block.

5. The shell and tube heat exchanger according to claim 3, characterized in that: A first spring for elastic reset is fixedly connected to the surface of the limit block, and the other side of the first spring is fixedly connected to the inner wall of the outer plate.

6. The shell and tube heat exchanger according to claim 3, which is convenient for assembly, is characterized in that: A working rod is fixedly connected to the surface of the limit block. The front view of the working rod is an inverted "L" structure, and the end of the working rod is located outside the outer plate. A cross bar is fixedly connected to the surface of the fixing plate, and the cross bars are symmetrically distributed on the upper and lower sides of the fixing plate. A movable plate is sleeved on the surface of the cross bar. A second spring for elastic reset is fixedly connected to the surface of the movable plate, and the other side of the second spring is fixedly connected to the surface of the fixing plate.

7. The shell and tube heat exchanger according to claim 1, which is easy to assemble, is characterized in that: The front view of the upper connecting plate is an inverted "U" shape. The cleaning assembly further includes a long pin fixedly connected to the inner wall of the upper connecting plate. A motor is bolted to the left outer surface of the upper connecting plate, and a bidirectional threaded rod is fixedly connected to the output end of the motor.

8. The shell and tube heat exchanger convenient for assembly according to claim 7, wherein: A slide plate is bolted to the surface of the bidirectional threaded rod.

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