Connecting structure of multi-sleeve heat exchanger and disassembly and assembly method of connecting structure

Abstract

The connecting structure comprises an inner pipe and an outer pipe, the inner pipe extends in a snakelike shape, the inner pipe comprises a plurality of horizontal pipe units and a plurality of bent pipe units, the horizontal pipe units are arranged in parallel, every two adjacent horizontal pipe units communicate with each other through the corresponding bent pipe unit, and the bent pipe units are arranged in the horizontal pipe units. The horizontal pipe unit is detachably connected with the bent pipe unit; the outer pipe comprises a plurality of sleeve units and a plurality of connecting pipe units, the horizontal pipe units are arranged in the sleeve units in a penetrating mode respectively, the adjacent sleeve units are communicated through the connecting pipe units, the two ends of each sleeve unit are detachably connected with blocking pieces respectively, and the ends of the bent pipe units are arranged on the blocking pieces in a penetrating mode. The device has the effect of being convenient to disassemble, assemble and clean.

Description

Technical Field

[0001] The present application relates to the field of heat exchange equipment, and in particular to a connection structure of a multi-tube heat exchanger and a disassembly and assembly method thereof. Background Art

[0002] As an important energy transfer equipment in industrial production, heat exchangers are widely used in chemical, petroleum, electric power and other industries. Traditional heat exchangers usually adopt a single tube or multiple tubes arranged in parallel to achieve heat exchange through the flow of fluid in the pipe. The multi-tube heat exchanger is composed of a group of tubes arranged side by side, including an inner tube and an outer tube. The inner tube extends in a serpentine shape, and the outer tube is divided into multiple sections and arranged on the periphery of the horizontal section of the inner tube. The adjacent outer tubes are interconnected, one fluid passes through the inner tube, and the other fluid passes through the outer tube. The two fluids are isolated from each other in these spaces, but can transfer heat through the tube wall.

[0003] In the related art, the inner tube and the outer tube are fixed by welding. After long-term use, dirt and sediment will accumulate inside the outer tube and the inner tube. The dirt will reduce the heat exchange efficiency of the heat exchanger. The tube wall needs to be cleaned regularly to remove the dirt and restore the heat exchange performance of the heat exchanger. The cleaning method is generally to inject a cleaning agent (such as an acidic cleaning agent, an alkaline cleaning agent or an oxidizing agent, etc.) into the tube. The cleaning agent reacts chemically when in contact with the dirt, thereby dissolving and removing the dirt.

[0004] Regarding the above-mentioned related technologies, there are the following defects: in actual application, it is difficult for cleaning agents to completely remove stubborn dirt on the tube wall. The best way is to use mechanical tools for brushing, but the current multi-tube heat exchanger is difficult to disassemble and is not convenient for brushing, so there is still room for improvement. Summary of the invention

[0005] In order to facilitate disassembly, assembly and cleaning, the present application provides a connection structure of a multi-tube heat exchanger and a disassembly method thereof.

[0006] The present application provides a connection structure of a multi-tube heat exchanger and a disassembly method thereof using the following technical solutions: A connection structure of a multi-tube heat exchanger, comprising: An inner tube, the inner tube extends in a serpentine shape, and the inner tube includes a plurality of horizontal tube units and a plurality of bent tube units, the plurality of horizontal tube units are arranged in parallel, two adjacent horizontal tube units are connected through the bent tube units, and the horizontal tube units and the bent tube units are detachably connected; The outer tube comprises a plurality of sleeve units and a plurality of connecting tube units, wherein the plurality of horizontal tube units are respectively inserted into the plurality of sleeve units, and the adjacent sleeve units are connected via connecting tube units, and both ends of the sleeve units are respectively detachably connected with plugging pieces, and the ends of the bent tube units are inserted into the plugging pieces.

[0007] By adopting the above technical solution, the inner tube is split into multiple horizontal tube units and bend units, and the outer tube is split into casing units and connecting tube units, so as to facilitate on-site disassembly and assembly. When assembling the heat exchanger, the casing unit and the connecting tube unit can be connected first, and then the horizontal tube unit can be installed in the casing unit. The two ends of the casing are closed by the plugging piece. At the same time, the bend unit connects the horizontal tube unit in the upper and lower adjacent through tube units, so as to complete the assembly of the heat exchanger pipeline. When the heat exchanger pipeline needs to be disassembled and cleaned, it is only necessary to disassemble the plugging piece, the bend unit and the horizontal tube unit, so that the horizontal tube unit, the casing unit and the bend unit can be brushed with a cleaning agent and a brush, which is beneficial to improve the cleaning effect.

[0008] Preferably, the sealing member includes a rubber plug for sealing the end of the casing unit and a cover plate for sealing the outside of the casing unit end, the rubber plug is provided with a through hole for the horizontal pipe unit end to pass through, and the cover plate is connected to the casing unit end by a flange.

[0009] By adopting the above technical solution, the rubber plug is sealed in the end of the casing unit, which not only seals the end opening position of the casing unit, but also limits and supports the end of the horizontal pipe unit through the through hole, which is beneficial to improve the stability of the horizontal pipe unit inside the casing unit.

[0010] Preferably, the end of the rubber plug is provided with an outer edge portion, and the outer edge portion is clamped between the cover plate and the flange of the sleeve unit.

[0011] By adopting the above technical solution, the outer edge of the end of the rubber plug is clamped with the flange of the sleeve unit through the cover plate, which is beneficial to improving the sealing effect of the sealing piece.

[0012] Preferably, the end of the bent pipe unit passes through the cover plate and is welded and fixed to the cover plate.

[0013] By adopting the above technical solution, the elbow unit and the cover plate are welded and fixed, which is beneficial to improving the connection stability between the elbow unit and the cover plate, facilitating the simultaneous disassembly and assembly of the elbow unit and the cover plate from the end of the shell unit, which is beneficial to improving the disassembly and assembly efficiency of the heat exchanger, and also beneficial to improving the sealing of the shell unit and the elbow unit.

[0014] Preferably, a spigot joint is provided at the end of the curved pipe unit, and the spigot joint is used for splicing and matching with the horizontal pipe unit.

[0015] By adopting the above technical solution, the bending pipe unit and the horizontal pipe unit are plugged in through the plug-in joint, which is beneficial to improving the convenience of disassembly and assembly of the bending pipe unit and the horizontal pipe unit.

[0016] Preferably, the number of horizontal pipe units inside the casing unit is not less than 2, a support frame is arranged between several horizontal pipe units inside the casing unit, the support frame is erected inside the casing unit, the support frame is provided with several positioning holes, the several positioning holes correspond one-to-one to the several horizontal pipe units inside the casing unit, and the horizontal pipe units are inserted into the corresponding positioning holes.

[0017] By adopting the above technical solution, the number of horizontal pipe units inside the casing unit can be increased according to actual needs, and positioning support is performed through the positioning holes of the support frame, which is beneficial to reducing the deformation probability of the horizontal pipe units.

[0018] A method for disassembling and assembling a connection structure of a multi-tube heat exchanger, comprising the following steps: When assembling the heat exchanger, first complete the connection between the casing unit and the connecting pipe unit, then install the horizontal pipe unit into the casing unit, seal both ends of the casing unit with the plugging piece, and connect the two ends of the elbow unit to the horizontal pipe units in the upper and lower adjacent through-pipe units respectively; When disassembling the heat exchanger, remove the plugging piece at the end of the shell and tube unit, and detach the elbow unit and the horizontal tube unit.

[0019] By adopting the above technical solution, the two ends of the sleeve are closed by the plugging piece, and at the same time the elbow unit is connected to the horizontal pipe unit in the upper and lower adjacent through-pipe units, so as to complete the assembly of the heat exchanger pipeline. When the heat exchanger pipeline needs to be disassembled and cleaned, it is only necessary to disassemble the plugging piece, the elbow unit and the horizontal pipe unit, so that the horizontal pipe unit, the sleeve unit and the elbow unit can be brushed with a cleaning agent and a brush, which is beneficial to improve the cleaning effect.

[0020] Preferably, when cleaning the heat exchanger pipe, first remove the cover plate in the sealing piece at the end of the sleeve unit, detach the elbow unit from the horizontal pipe unit, then take out the rubber plug at one end of the sleeve unit, and then inject a cleaning agent into the sleeve unit. After the cleaning agent is in full contact with the inner wall of the sleeve unit, push the horizontal pipe unit and the rubber plug at the other end of the sleeve unit at the same time, forcing the outer edge of the rubber plug to deform and enter the sleeve unit. The outer edge of the rubber plug slides against the inner wall of the through pipe unit and scrapes off stubborn impurities on the inner wall of the sleeve unit.

[0021] By adopting the above technical solution, the rubber plug at one end of the sleeve unit is first removed to facilitate the introduction of a cleaning agent into the sleeve unit so that the cleaning agent is in full contact with the inner wall of the sleeve unit, and then the horizontal pipe unit and the rubber plug are simultaneously pushed from the other end of the sleeve unit. By utilizing the elastic deformation of the outer edge of the rubber plug, the outer edge of the rubber plug is forced to deform and enter the sleeve unit, while sliding close to the inner wall of the through-tube unit. The outer edge of the rubber plug scrapes off stubborn impurities on the inner wall of the sleeve unit, which is beneficial to improving the cleaning efficiency of the sleeve unit.

[0022] In summary, the present application includes at least one of the following beneficial technical effects: 1. By splitting the inner tube into multiple horizontal tube units and elbow units, and splitting the outer tube into casing units and connecting tube units, it is convenient for on-site disassembly and assembly. When assembling the heat exchanger, the casing unit and the connecting tube unit can be connected first, and then the horizontal tube unit can be installed into the casing unit. The two ends of the casing are sealed with the plugging piece. At the same time, the elbow unit connects the horizontal tube unit in the upper and lower adjacent through-tube units, so as to complete the assembly of the heat exchanger pipeline. When the heat exchanger pipeline needs to be disassembled and cleaned, it is only necessary to disassemble the plugging piece, the elbow unit and the horizontal tube unit, so that the horizontal tube unit, the casing unit and the elbow unit can be brushed with a cleaning agent and a brush, which is conducive to improving the cleaning effect; 2. The rubber plug is sealed in the end of the casing unit, which not only seals the end opening of the casing unit, but also limits and supports the end of the horizontal pipe unit through the through hole, which is beneficial to improve the stability of the horizontal pipe unit inside the casing unit; 3. Remove the rubber plug at one end of the sleeve unit to facilitate the introduction of cleaning agent into the sleeve unit so that the cleaning agent is in full contact with the inner wall of the sleeve unit. Then push the horizontal tube unit and the rubber plug at the other end of the sleeve unit at the same time. By utilizing the elastic deformation of the outer edge of the rubber plug, the outer edge of the rubber plug is forced to deform and enter the sleeve unit, while sliding close to the inner wall of the through-tube unit. The outer edge of the rubber plug scrapes off the stubborn impurities on the inner wall of the sleeve unit, which is beneficial to improving the cleaning efficiency of the sleeve unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is an overall schematic diagram of a connection structure of a multi-tube heat exchanger according to an embodiment of the present application.

[0024] Figure 2 It is an exploded schematic diagram of a connection structure of a multi-tube heat exchanger according to an embodiment of the present application.

[0025] Figure 3 It is a schematic diagram of the connection between a horizontal tube unit and a support frame in a connection structure of a multi-tube heat exchanger in an embodiment of the present application.

[0026] Figure 4 It is a cross-sectional view of a connection structure of a multi-tube heat exchanger according to an embodiment of the present application.

[0027] Explanation of the reference numerals: 1. inner tube; 11. elbow unit; 12. horizontal tube unit; 13. plug connector 2. outer tube; 21. sleeve unit; 22. connecting tube unit; 3. plugging piece; 31. rubber plug; 32. cover plate; 33. through hole; 34. outer edge; 4. support frame; 41. positioning hole. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1-4 This application is described in further detail.

[0029] The present application embodiment discloses a connection structure of a multi-tube heat exchanger, referring to Figure 1 and Figure 2 , including an inner tube 1 and an outer tube 2, wherein the inner tube 1 extends in a serpentine shape. The inner tube 1 includes a plurality of horizontal tube units 12 and a plurality of curved tube units 11, wherein the plurality of horizontal tube units 12 are arranged in parallel and in a vertical direction. Two adjacent horizontal tube units 12 are connected through the curved tube unit 11, and the horizontal tube unit 12 and the curved tube unit 11 are detachably connected.

[0030] In this embodiment, the outer tube 2 includes a plurality of sleeve units 21 and a plurality of connecting pipe units 22, a plurality of horizontal pipe units 12 are respectively inserted into the plurality of sleeve units 21, and the upper and lower adjacent sleeve units 21 are connected through the connecting pipe units 22, and the two ends of the sleeve units 21 are respectively detachably connected with the plugging members 3, and the ends of the elbow units 11 are inserted into the plugging members 3. The two ends of the sleeve are sealed by the plugging members 3, and the elbow units 11 are connected to the horizontal pipe units 12 in the upper and lower adjacent through-pipe units, thereby completing the assembly of the heat exchanger pipeline. When the heat exchanger pipeline needs to be disassembled and cleaned, only the plugging members 3, the elbow units 11 and the horizontal pipe units 12 need to be disassembled, so that the horizontal pipe units 12, the sleeve units 21 and the elbow units 11 can be scrubbed with a cleaning agent and a brush, which is conducive to improving the cleaning effect.

[0031] In this embodiment, the plugging member 3 includes a rubber plug 31 for sealing and plugging the end of the casing unit 21 and a cover plate 32 for sealing the end of the casing unit 21. The rubber plug 31 is provided with a through hole 33 for the end of the horizontal pipe unit 12 to pass through, and the cover plate 32 is connected to the end of the casing unit 21 through a flange. By sealing and plugging the rubber plug 31 in the end of the casing unit 21, not only the sealing effect between the plugging member 3 and the end opening of the casing unit 21 is improved, but also the end of the horizontal pipe unit 12 is limited and supported by the through hole 33, which is conducive to improving the stability of the horizontal pipe unit 12 inside the casing unit 21.

[0032] In this embodiment, an annular outer edge portion 34 is provided on the outer periphery of the end of the rubber plug 31 , and the outer edge portion 34 is clamped between the cover plate 32 and the flange of the sleeve unit 21 , which is beneficial to further improve the sealing effect of the plugging member 3 .

[0033] In this embodiment, the end of the elbow unit 11 passes through the cover plate 32 and is welded to the cover plate 32. A plug connector 13 is installed at the end of the elbow unit 11, and the elbow unit 11 is plugged and matched with the horizontal pipe unit 12 through the plug connector 13. This is conducive to improving the convenience of disassembly and assembly of the elbow unit 11 and the horizontal pipe unit 12.

[0034] Reference Figure 3 and Figure 4 In this embodiment, the number of horizontal pipe units 12 inside the casing unit 21 can be increased according to actual needs, so that the number of horizontal pipe units 12 inside the casing unit 21 is not less than 2. A support frame 4 is installed between the horizontal pipe units 12 in the casing unit 21. The support frame 4 is set inside the casing unit 21. The support frame 4 is provided with a plurality of positioning holes 41. The plurality of positioning holes 41 correspond to the plurality of horizontal pipe units 12 inside the casing unit 21 one by one. The horizontal pipe units 12 are inserted and locked in the corresponding positioning holes 41. This is conducive to reducing the probability of deformation of the horizontal pipe units 12.

[0035] The embodiment of the present application also discloses a method for disassembling and assembling a connection structure of a multi-tube heat exchanger, comprising the following steps: When assembling the heat exchanger pipeline, first complete the connection operation between the sleeve unit 21 and the connecting pipe unit 22, then complete the plug-in and locking operation of the support frame 4 and several horizontal pipe units 12, and then insert the horizontal pipe unit 12 into the corresponding sleeve unit 21, and the horizontal pipe unit 12 is installed inside the sleeve unit 21 through the support frame 4.

[0036] Then, the two ends of the casing unit 21 are sealed with the plugging piece 3, and the rubber plugs 31 of the plugging piece 3 are respectively inserted into the ends of the corresponding casing unit 21, and the plugging operation of the ends of the horizontal pipe unit 12 and the through holes 33 of the rubber plugs 31 is completed at the same time. Then, the plugging steps of the two ends of the elbow unit 11 and the horizontal pipe units 12 in the upper and lower adjacent casing units 21 are completed, and the cover plate 32 at the end of the elbow is locked to the end of the casing unit 21 through the flange, thereby completing the installation steps of the heat exchanger pipeline.

[0037] When disassembling and cleaning the heat exchanger pipeline, first remove the cover plate 32 of the plugging member 3 at the end of the sleeve unit 21, and at the same time detach the elbow unit 11 from the horizontal pipe unit 12. Then take out the rubber plug 31 at one end of the sleeve unit 21, and then inject the cleaning agent into the sleeve unit 21. After the cleaning agent is fully in contact with the inner wall of the sleeve unit 21, the cleaning personnel then use a long tool such as a push rod to extend from the other end of the sleeve unit 21, thereby simultaneously pushing the horizontal pipe unit 12 and the rubber plug 31 along the length direction of the sleeve unit 21, forcing the outer edge 34 of the rubber plug 31 to deform and enter the sleeve unit 21, and the outer edge 34 of the rubber plug 31 slides close to the inner wall of the through pipe unit and scrapes off the stubborn impurities on the inner wall of the sleeve unit 21.

[0038] The curved pipe unit 11 and the horizontal pipe unit 12 are soaked in a water tank storing cleaning liquid, and then cleaned independently with a soft-bar brush.

[0039] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A connection structure of a multi-tube heat exchanger, characterized in that: include: An inner tube (1), the inner tube (1) extending in a serpentine shape, the inner tube (1) comprising a plurality of horizontal tube units (12) and a plurality of bent tube units (11), the plurality of horizontal tube units (12) being arranged in parallel, two adjacent horizontal tube units (12) being connected via the bent tube units (11), and the horizontal tube units (12) and the bent tube units (11) being detachably connected; An outer tube (2), the outer tube (2) comprising a plurality of sleeve units (21) and a plurality of connecting tube units (22), the plurality of horizontal tube units (12) being respectively inserted into the plurality of sleeve units (21), adjacent sleeve units (21) being connected via the connecting tube units (22), both ends of the sleeve units (21) being detachably connected with plugging pieces (3), and the ends of the bent tube units (11) being inserted into the plugging pieces (3).

2. The connection structure of a multi-tube heat exchanger according to claim 1, characterized in that: The sealing member (3) comprises a rubber plug (31) for sealing the end of the sleeve unit (21) and a cover plate (32) for sealing the end of the sleeve unit (21). The rubber plug (31) is provided with a through hole (33) for the end of the horizontal pipe unit (12) to pass through. The cover plate (32) is connected to the end of the sleeve unit (21) via a flange.

3. The connection structure of a multi-tube heat exchanger according to claim 2, characterized in that: An outer edge portion (34) is provided at the end of the rubber plug (31), and the outer edge portion (34) is clamped between the cover plate (32) and the flange of the sleeve unit (21).

4. The connection structure of a multi-tube heat exchanger according to claim 2, characterized in that: The end of the bent pipe unit (11) passes through the cover plate (32) and is welded and fixed to the cover plate (32).

5. The connection structure of a multi-tube heat exchanger according to claim 1, characterized in that: The end of the curved pipe unit (11) is provided with a pipe joint (13), and the pipe joint (13) is used for plugging and matching with the horizontal pipe unit (12).

6. The connection structure of a multi-tube heat exchanger according to claim 1, characterized in that: The number of the horizontal pipe units (12) inside the casing unit (21) is not less than 2, and a support frame (4) is arranged between the plurality of the horizontal pipe units (12) inside the casing unit (21). The support frame (4) is erected inside the casing unit (21), and the support frame (4) is provided with a plurality of positioning holes (41). The plurality of positioning holes (41) correspond one-to-one to the plurality of horizontal pipe units (12) inside the casing unit (21), and the horizontal pipe units (12) are inserted into the corresponding positioning holes (41).

7. A method for disassembling and assembling the connection structure of a multi-tube heat exchanger according to any one of claims 1 to 6, characterized in that: The following steps are involved: When assembling the heat exchanger, the connection between the casing unit (21) and the connecting pipe unit (22) is first completed, and then the horizontal pipe unit (12) is installed in the casing unit (21), and the two ends of the casing unit (21) are sealed by the plugging piece (3), and the two ends of the bent pipe unit (11) are respectively connected to the horizontal pipe units (12) in the casing units (21) adjacent to each other above and below; When disassembling the heat exchanger, the sealing piece (3) at the end of the sleeve unit (21) is removed, and the elbow unit (11) and the horizontal pipe unit (12) are detached.

8. The method for disassembling and assembling the connection structure of a multi-tube heat exchanger according to claim 3, characterized in that: When cleaning the heat exchanger pipe, the cover plate (32) in the sealing member (3) at the end of the sleeve unit (21) is first removed, and the elbow unit (11) is detached from the horizontal pipe unit (12), and then the rubber plug (31) at one end of the sleeve unit (21) is taken out, and then a cleaning agent is injected into the sleeve unit (21). After the cleaning agent is fully in contact with the inner wall of the sleeve unit (21), the horizontal pipe unit (12) and the rubber plug (31) are pushed simultaneously from the other end of the sleeve unit (21), forcing the outer edge (34) of the rubber plug (31) to deform and enter the sleeve unit (21), and the outer edge (34) of the rubber plug (31) slides closely against the inner wall of the through pipe unit and scrapes off the stubborn impurities on the inner wall of the sleeve unit (21).

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