Plate heat exchanger cleaning device
By designing a combination of brackets, guide rails, and brushing devices, in-situ cleaning of plate heat exchangers was achieved, solving the problems of low efficiency and high cost of existing cleaning methods, improving cleaning efficiency, and reducing the labor intensity of workers.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- YUNNAN WENSHAN ALUMINUM CO LTD
- Filing Date
- 2025-05-26
- Publication Date
- 2026-04-21
AI Technical Summary
Existing plate heat exchanger cleaning methods suffer from low cleaning efficiency, high cost, or significant damage to the equipment, especially when cleaning is difficult to achieve efficiently without disassembly or with minimal disassembly.
A cleaning device including a support, guide rail, plate moving device and brush washing device is designed. The heat exchange plate is cleaned in situ through sliding and pulling mechanism, and the surface of the heat exchange plate is cleaned by water spray pipe and brush roller assembly, avoiding complete disassembly of heat exchanger.
It achieves efficient and low-cost heat exchanger cleaning, reduces the labor intensity of workers, shortens the cleaning cycle, and can clean multiple heat exchangers at the same time.
Smart Images
Figure CN224151522U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of cleaning devices, and more specifically, to a plate heat exchanger cleaning device. Background Technology
[0002] A plate heat exchanger consists of a set of corrugated metal plates with four corner holes for the passage of two different liquids. The metal plates are mounted within a frame with fixed plates and movable clamping plates on one side and are clamped together with bolts. Gaskets are fitted onto the plates to seal the fluid passages and guide the fluids to flow alternately into their respective channels, thus facilitating heat exchange.
[0003] In a plate heat exchanger, the heat exchange plates are filled with fluids at different temperatures, and heat exchange is achieved through the heat exchange plates. Therefore, during long-term use, some substances in the fluid, such as organic matter, may stick to the heat exchange plates, affecting the flow rate and heat exchange effect of the heat exchanger. Common cleaning methods include: (1) flushing the surface of the heat exchange plates with cleaning fluid. This method causes little damage to the heat exchange plates, but the cleaning effect is not good, and it is time-consuming and uses a lot of water; (2) cleaning with chemical reagents. This method has a good cleaning effect, but it has a large negative impact on the heat exchanger; (3) disassembly and cleaning, which involves disassembling the heat exchanger and cleaning it manually. This method has a good cleaning effect and has little impact on the heat exchanger, but it is costly and time-consuming because it requires disassembling and relocating the heat exchanger. This method is usually adopted after a long period of use. Therefore, a device that has less impact on the heat exchanger and has higher cleaning efficiency can be designed. Utility Model Content
[0004] The purpose of this invention is to provide a plate heat exchanger cleaning device that can efficiently clean the heat exchanger in situ, with higher cleaning efficiency and less impact on the heat exchanger.
[0005] This utility model is achieved through the following technical solution: The plate heat exchanger cleaning device of this utility model includes a heat exchanger comprising multiple vertically arranged heat exchange plates, a support mounted on the heat exchanger, a guide rail horizontally mounted on the support, a plate-moving device slidably mounted on the guide rail, and a brushing device slidably mounted on the guide rail; the length direction of the guide rail is parallel to the distribution direction of the heat exchange plates; the plate-moving device includes a first slider slidably connected to the guide rail, a slide rod connected to the first slider, a pair of vertically arranged locking strips at both ends of the slide rod, a slot formed on the side of the locking strips near the first slider, and a driving device for driving the pair of locking strips to move closer / away from each other; the axial direction of the slide rod is perpendicular to the length direction of the guide rail; a second slider slidably mounted on the guide rail, the second slider being connected to a pulling device for driving the brushing device to rise and fall; the brushing device includes a connecting assembly located below the second slider, and a pair of cleaning assemblies respectively located on both sides of the connecting assembly; the cleaning assemblies are used to clean the surface of the heat exchange plates.
[0006] Furthermore, the first slider is disposed on the upper side of the guide rail, and the first slider is connected to a first linear motor, which is used to drive the first slider to move along the guide rail.
[0007] Furthermore, the driving device includes a fixing block disposed at the upper end of the card strip, a screw threadedly connected to a pair of the fixing blocks, and a first drive motor for driving the screw to rotate; the threads at both ends of the screw are in opposite directions.
[0008] Furthermore, the slide rod is slidably connected to the fixed block, and the axial direction of the slide rod is parallel to the axial direction of the screw.
[0009] Furthermore, the cleaning assembly includes a housing with a side opening, a water spray pipe horizontally disposed above the opening side of the housing, a plurality of nozzles disposed on the side wall of the water spray pipe, a water supply device connected to the water spray pipe, a brush roller horizontally disposed below the water spray pipe, a second drive motor for driving the brush roller to rotate, and a drain pipe disposed on the lower side of the housing; the opening side of the housing is disposed facing the heat exchange plate.
[0010] Furthermore, the brush rollers are provided in pairs, with one brush roller located directly below the other brush roller; the water spray pipes are provided in pairs, with the pair of water spray pipes respectively located on the upper and lower sides of the brush rollers.
[0011] Furthermore, the cleaning assembly also includes a drain groove formed on the lower side of the housing; the drain pipe is connected to the drain groove and a negative pressure device is connected to the drain pipe.
[0012] Furthermore, the connecting assembly includes a connecting plate vertically disposed between a pair of housings, and a plurality of connecting rods disposed on both sides of the connecting plate; one end of the connecting rod is hinged to the connecting plate, and the other end is hinged to the outer wall of the housing; the plurality of connecting rods located on the same side of the connecting plate are parallel to each other.
[0013] Furthermore, the second slider is slidably disposed on the lower side of the guide rail, and the second slider is connected to a second linear motor, which is used to drive the second slider to move along the guide rail; the second slider is connected to a fixed plate; the pulling device includes a first winding shaft disposed in the middle of the lower side of the fixed plate, a first pull rope wound on the first winding shaft, and a first winding motor used to drive the first winding shaft to rotate; the first pull rope is fixedly connected to the middle of the connecting plate.
[0014] Furthermore, the pulling device also includes a pair of second winding shafts respectively located at both ends of the lower side of the fixed plate, a second winding motor for driving the second winding shafts to rotate, a second pull rope wound on the second winding shaft, and a pair of third pull ropes located at the lower end of the second pull rope; the pair of third pull ropes are respectively connected to the upper side of the pair of housings.
[0015] The technical solution of this utility model has at least the following advantages and beneficial effects: In the plate heat exchanger cleaning device of this utility model, the limiting plates at both ends of the heat exchange plate are first disassembled and moved a certain distance to separate the heat exchange plates. Then, a hoisting device is used to hoist the bracket onto the heat exchanger. A driving device is used to drive a pair of locking strips closer together, causing the sides of the heat exchange plates to engage with the slots on the locking strips. Then, the first sliding block is moved to move the first sliding rod, locking strips, and heat exchange plates. A pulling device is then used to lower the brushing device between the two heat exchange plates, and the cleaning components clean the surface of the heat exchange plates. After cleaning, the pulling device is used to move the brushing device above the heat exchange plates. Then, a plate-moving device is used to move the uncleaned heat exchange plates, and the brushing device is moved between the uncleaned heat exchange plates to clean them. This device can thoroughly clean the heat exchange plates without completely disassembling and moving the heat exchanger. Only partial disassembly is needed to achieve in-situ cleaning of the heat exchanger. The entire cleaning process can be operated by workers, significantly reducing their labor intensity. Furthermore, the support frame can be moved to the location of the heat exchanger that needs cleaning. In other words, only one cleaning device is needed to clean multiple heat exchangers, resulting in higher cleaning efficiency, lower costs, and a shorter cleaning cycle. Attached Figure Description
[0016] Figure 1 A schematic diagram of the plate heat exchanger cleaning device provided in this embodiment of the present invention during operation;
[0017] Figure 2 A two-view structural schematic diagram of the plate heat exchanger cleaning device provided in the embodiment of this utility model during operation;
[0018] Figure 3 A schematic diagram of the plate heat exchanger cleaning device before cleaning, provided in an embodiment of this utility model.
[0019] Figure 4 This is a schematic diagram of the internal structure of the plate heat exchanger cleaning device provided in an embodiment of the present utility model.
[0020] Figure 5 A schematic diagram of the brushing device provided in an embodiment of this utility model from one perspective;
[0021] Figure 6 A two-view structural schematic diagram of the scrubbing device provided in an embodiment of this utility model;
[0022] Figure 7 This is a schematic diagram of the structure of the brush roller provided in an embodiment of the present utility model;
[0023] Figure 8 This is a schematic diagram of the structure of the water spray pipe provided in an embodiment of the present utility model;
[0024] Figure 9 This is a schematic diagram of the structure of the connecting component provided in an embodiment of the present utility model;
[0025] Figure 10 This is a schematic diagram of the structure of the plate-shifting device provided in an embodiment of the present utility model;
[0026] Figure 11 for Figure 5 Enlarged view of section A.
[0027] Icons: 10-Heat exchanger, 11-Heat exchange plate, 20-Bracket, 21-Guide rail, 30-Plate moving device, 31-First slider, 32-Slide rod, 33-Clamping strip, 34-Clamping slot, 35-Drive device, 351-Fixing block, 352-Screw, 353-First drive motor, 36-First linear motor, 40-Brushing device, 41-Cleaning assembly, 411-Housing, 412-Water spray pipe, 413-Nozzle, 414-Brush roller 415-Drainage trough, 416-Drainage pipe, 417-Second drive motor, 42-Connecting assembly, 421-Connecting plate, 422-Connecting rod, 43-Pull device, 431-First winding shaft, 432-First winding motor, 433-First pull rope, 434-Second winding shaft, 435-Second winding motor, 346-Second pull rope, 437-Third pull rope, 44-Second slider, 45-Fixing plate, 46-Second linear motor. Detailed Implementation
[0028] Example
[0029] The following description, in conjunction with specific embodiments, further illustrates the points, as shown in the appendix. Figure 1 - Appendix Figure 11 As shown, the plate heat exchanger cleaning device of this embodiment includes a heat exchanger 10, which includes a plurality of vertically arranged heat exchange plates 11, a support 20 mounted on the heat exchanger 10, a guide rail 21 horizontally mounted on the support 20, a plate moving device 30 slidably mounted on the guide rail 21, and a brushing device 40 slidably mounted on the guide rail 21; the length direction of the guide rail 21 is parallel to the distribution direction of the heat exchange plates 11; the plate moving device 30 includes a first slider 31 slidably connected to the guide rail 21, a slide rod 32 connected to the first slider 31, and a pair of vertically arranged slide rods at both ends of the slide rod 32. The guide rail 21 has a slot 34 on the side of the guide rail 21 near the first slider 31, and a drive device 35 for driving the pair of guide rails 33 to move closer / away from each other; the axis of the slide rod 32 is perpendicular to the length direction of the guide rail 21; a second slider 44 is slidably mounted on the guide rail 21, and the second slider 44 is connected to a pulling device 43 for driving the brushing device 40 to rise and fall; the brushing device 40 includes a connecting assembly 42 located below the second slider 44, and a pair of cleaning assemblies 41 respectively located on both sides of the connecting assembly 42; the cleaning assemblies 41 are used to clean the surface of the heat exchange plate 11. Specifically, in use, the limiting plates at both ends of the heat exchange plate 11 are first disassembled and then moved a certain distance so that the heat exchange plate 11 can be separated from each other, and then the bracket 20 is hoisted onto the heat exchanger 10 using a hoisting device (as shown in the attached figure). Figure 3 As shown in the attached diagram, firstly, the driving device 35 drives a pair of retaining bars 33 to move closer together, so that the side of the heat exchange plate 11 is engaged in the retaining groove 34 on the retaining bar 33. Then, the first slider 31 is moved to move the first slide bar 32, the retaining bar 33 and the heat exchange plate 11. Then, the pulling device 43 is used to move the brushing device 40 down between the two heat exchange plates 11 (as shown in the attached diagram). Figure 1 - Appendix Figure 2 As shown, the surface of the heat exchange plate 11 is cleaned by the cleaning component 41. After cleaning, the brushing device 40 is moved upwards above the heat exchange plate 11 by the pulling device 43. Then, the plate moving device 30 is used to move the uncleaned heat exchange plate 11. The brushing device 40 is then moved between the uncleaned heat exchange plates 11 to clean them. In this way, the heat exchange plate 11 can be thoroughly cleaned without completely disassembling and moving the heat exchanger 10. Only partial disassembly is needed to achieve in-situ cleaning of the heat exchanger 10. The entire process can be operated by workers, significantly reducing the labor intensity of workers. Moreover, the support 20 can be moved to the heat exchanger 10 that needs to be cleaned. That is, only one cleaning device is needed to clean multiple heat exchangers 10, which not only has higher cleaning efficiency but also lower cost and shorter cleaning cycle.
[0030] In this embodiment, the first slider 31 is disposed on the upper side of the guide rail 21. The first slider 31 is connected to a first linear motor 36, which drives the first slider 31 to move along the guide rail 21. Specifically, the first slider 31 can be driven to reciprocate on the guide rail 21 by the first linear motor 36, or it can be driven to move by a lead screw and nut or other means.
[0031] The driving device 35 in this embodiment includes a fixing block 351 disposed on the upper end of the locking strip 33, a screw 352 threadedly connected to a pair of fixing blocks 351, and a first drive motor 353 for driving the screw 352 to rotate; the thread directions at both ends of the screw 352 are opposite. The slide rod 32 is slidably connected to the fixing blocks 351, and the axial direction of the slide rod 32 is parallel to the axial direction of the screw 352. Specifically, the first drive motor 353 drives the screw 352 to rotate, which in turn drives a pair of fixing blocks 351 and clamping strips 33 to move closer or further apart. When the pair of clamping strips 33 move closer together, the side wall of the heat exchange plate 11 is engaged in the groove 34 of the clamping strip 33. Then, the first linear motor 36 drives the first slider 31 to move on the guide rail 21, thereby moving the clamping strips 33 and the heat exchange plate 11 to the cleaned heat exchange plate 11 through the first sliding rod 32, fixing blocks 351 and other structures, exposing the uncleaned heat exchange plate 11. Then, the cleaning assembly 41 cleans the heat exchange plate 11. During the cleaning process, the clamping strips 33 can also temporarily support the heat exchange plate 11. After cleaning, the first drive motor 353 drives the pair of clamping strips 33 to move away from each other through the screw 352. Then, the first linear motor 36 drives the clamping strips 33 to move to the uncleaned heat exchange plate 11. The above operation is repeated until all heat exchange plates 11 are cleaned.
[0032] The cleaning assembly 41 in this embodiment includes a housing 411 with a side opening, a water spray pipe 412 horizontally positioned above the opening side of the housing 411, multiple nozzles 413 disposed on the sidewall of the water spray pipe 412, a water supply device connected to the water spray pipe 412, a brush roller 414 horizontally positioned below the water spray pipe 412, a second drive motor 417 for driving the brush roller 414 to rotate, and a drain pipe 416 disposed on the lower side of the housing 411; the opening side of the housing 411 faces the heat exchange plate 11. Specifically, the cleaning assembly 41 is lowered between the heat exchange plates 11 by the pulling device 43, so that the opening side of the housing 411 is attached to the wall of the heat exchange plate 11. The cleaning liquid is sent into the water spray pipe 412 by the water supply device and sprayed onto the heat exchange plate 11 through the nozzles 413. The second drive motor 417 drives the brush roller 414 to rotate and efficiently scrub the wall of the heat exchange plate 11. The waste liquid after cleaning is discharged through the drain pipe 416 below.
[0033] In this embodiment, a pair of brush rollers 414 are provided, with one brush roller 414 located directly below the other brush roller 414; a pair of water spray pipes 412 are provided, with the pair of water spray pipes 412 respectively located on the upper and lower sides of the brush rollers 414. Specifically, providing a pair of water spray pipes 412 and a pair of brush rollers 414 can better clean the heat exchange plate 11.
[0034] The cleaning assembly 41 in this embodiment also includes a drain trough 415 formed on the lower side of the housing 411; a drain pipe 416 is connected to the drain trough 415, and the drain pipe 416 is connected to a negative pressure device. Specifically, the drain trough 415 and the negative pressure device can discharge wastewater more quickly, preventing wastewater from flowing onto the ground.
[0035] In this embodiment, the connecting assembly 42 includes a connecting plate 421 vertically disposed between a pair of housings 411, and a plurality of connecting rods 422 disposed on both sides of the connecting plate 421. One end of the connecting rod 422 is hinged to the connecting plate 421, and the other end is hinged to the outer wall of the housing 411. The plurality of connecting rods 422 located on the same side of the connecting plate 421 are parallel to each other. Specifically, the connecting plate 421 and the plurality of connecting plates 421 form a parallelogram structure between the connecting plate 421, the connecting plate 421 and the outer wall of the housing 411. In this way, as long as the connecting plate 421 is in a vertical state, the housing 411 can also be kept in a vertical state, so that the open side of the housing 411 can be well attached to the heat exchange plate 11, improving cleaning efficiency and preventing liquid splashing during the cleaning process.
[0036] In this embodiment, the second slider 44 is slidably disposed on the lower side of the guide rail 21. The second slider 44 is connected to a second linear motor 46, which drives the second slider 44 to move along the guide rail 21. The second slider 44 is connected to a fixed plate 45. The pulling device 43 includes a first winding shaft 431 disposed in the middle of the lower side of the fixed plate 45, a first pull rope 433 wound on the first winding shaft 431, and a first winding motor 432 for driving the first winding shaft 431 to rotate. The first pull rope 433 is fixedly connected to the middle of the connecting plate 421. Specifically, the second linear motor 46 can drive the second slider 44 and the brushing device 40 below it to move along the guide rail 21. Alternatively, a ball screw or other structure can be used instead of the second linear motor 46. By driving the first winding shaft 431 to rotate through the first winding motor 432, the first pull rope 433 can be tightened and loosened, thereby achieving lifting and lowering control of the brushing device 40. The first pull rope 433 is connected to the connecting plate 421. Under its own gravity, the cleaning components 41 on both sides of the connecting plate 421 will naturally move closer to the heat exchange plates 11 on both sides, which can better clean the heat exchange plates 11.
[0037] The pulling device 43 in this embodiment also includes a pair of second winding shafts 434 respectively disposed at both ends of the lower side of the fixed plate 45, a second winding motor 435 for driving the second winding shafts 434 to rotate, a second pull rope 346 wound on the second winding shafts 434, and a pair of third pull ropes 437 disposed at the lower end of the second pull ropes 346; the pair of third pull ropes 437 are respectively connected to the upper side of a pair of housings 411. Specifically, before the scrubbing device 40 is placed between the heat exchange plates 11, the second pull rope 346 provides tension to the scrubbing device 40 (the first pull rope 433 does not provide tension). Under the weight of the connecting plate 421 itself, it will move downwards, thereby pulling the pair of housings 411 closer together through the connecting rod 422, reducing the distance between the pair of housings 411. This allows it to be better inserted between the heat exchange plates 11. When it is inserted between the heat exchange plates 11 and ready for cleaning, the first pull rope 433 is used to provide tension (the second pull rope 346 releases tension). At this time, the pair of housings 411 move away from each other under the action of gravity and stick tightly to the heat exchange plates 11 for cleaning.
[0038] In summary, the plate heat exchanger cleaning device of this embodiment first removes the limiting plates at both ends of the heat exchange plate 11 and moves them a certain distance so that the heat exchange plates 11 can be separated from each other. Then, the bracket 20 is hoisted onto the heat exchanger 10 using the hoisting device. The drive device 35 drives a pair of locking strips 33 to move closer to each other so that the side of the heat exchange plate 11 is locked into the slot 34 on the locking strip 33. Then, the first sliding rod 32, locking strips 33 and heat exchange plate 11 are moved by moving the first slider 31. Then, the brushing device 40 is lowered between the two heat exchange plates 11 using the pulling device 43. The surface of the heat exchange plate 11 is cleaned by the cleaning component 41. After cleaning, the brushing device 40 is raised above the heat exchange plate 11 using the pulling device 43. Then, the plate moving device 30 is used to move the uncleaned heat exchange plate 11. Then, the brushing device 40 is moved between the uncleaned heat exchange plates 11 to clean the heat exchange plate 11. This device can thoroughly clean the heat exchange plate 11 without completely disassembling and moving the heat exchanger 10. Only partial disassembly is needed to achieve in-situ cleaning of the heat exchanger 10. The entire cleaning process can be operated by workers, significantly reducing their labor intensity. Furthermore, the support 20 can be moved to the location of the heat exchanger 10 that needs cleaning. In other words, only one cleaning device is needed to clean multiple heat exchangers 10, resulting in higher cleaning efficiency, lower cost, and a shorter cleaning cycle.
[0039] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A plate heat exchanger cleaning device comprising a heat exchanger (10) comprising a plurality of vertically arranged heat exchanger plates (11), characterized in that: The device comprises a support (20) arranged on the heat exchanger (10), a guide rail (21) horizontally arranged on the support (20), a moving plate device (30) slidingly arranged on the guide rail (21), and a brushing device (40) slidingly arranged on the guide rail (21); the length direction of the guide rail (21) is parallel to the distribution direction of the heat exchange plates (11); The moving plate device (30) comprises a first sliding block (31) slidingly connected with the guide rail (21), a sliding rod (32) connected with the first sliding block (31), a pair of clamping strips (33) vertically arranged at both ends of the sliding rod (32), a clamping groove (34) opened on one side of the clamping strip (33) close to the first sliding block (31), and a driving device (35) for driving the pair of clamping strips (33) to move close to or away from each other; the axial direction of the sliding rod (32) is perpendicular to the length direction of the guide rail (21); The second sliding block (44) is slidingly arranged on the guide rail (21), and the second sliding block (44) is connected with a pulling device (43) for driving the brushing device (40) to move up and down; the brushing device (40) comprises a connecting assembly (42) arranged below the second sliding block (44), and a pair of cleaning assemblies (41) respectively arranged on both sides of the connecting assembly (42); the cleaning assembly (41) is used for cleaning the surface of the heat exchange plate (11).
2. A plate heat exchanger cleaning device according to claim 1, characterized in that The first sliding block (31) is arranged on the upper side of the guide rail (21), and the first sliding block (31) is connected with a first linear motor (36) for driving the first sliding block (31) to move along the guide rail (21).
3. A plate heat exchanger cleaning device according to claim 1, characterized in that: The driving device (35) comprises a fixed block (351) arranged at the upper end of the clamping strip (33), a screw rod (352) threadedly connected with a pair of the fixed blocks (351), and a first driving motor (353) for driving the screw rod (352) to rotate; The screw rods (352) at both ends are opposite in thread direction.
4. A plate heat exchanger cleaning device according to claim 3, characterized in that: The sliding rod (32) is slidingly connected with the fixed block (351), and the axial direction of the sliding rod (32) is parallel to the axial direction of the screw rod (352).
5. The plate heat exchanger cleaning device according to claim 1, characterized in that: The cleaning assembly (41) comprises a shell (411) with an open side, a water spraying pipe (412) horizontally arranged above the open side of the shell (411), a plurality of nozzles (413) arranged on the side wall of the water spraying pipe (412), a water supply device connected with the water spraying pipe (412), a brush roller (414) horizontally arranged below the water spraying pipe (412), a second driving motor (417) for driving the brush roller (414) to rotate, and a drain pipe (416) arranged on the lower side of the shell (411); The open side of the shell (411) faces the heat exchange plate (11).
6. A plate heat exchanger cleaning device according to claim 5, characterized in that: The brush roller (414) is arranged in pairs, and one brush roller (414) is arranged directly below the other brush roller (414); The water spraying pipe (412) is arranged in pairs, and a pair of the water spraying pipes (412) are respectively arranged on the upper and lower sides of the brush roller (414).
7. A plate heat exchanger cleaning device according to claim 5, characterized in that: The cleaning assembly (41) further comprises a drain groove (415) formed in the lower side of the shell (411); the drain pipe (416) is in communication with the drain groove (415), and the negative pressure device is connected to the drain pipe (416).
8. A plate heat exchanger cleaning device according to claim 5, characterized in that: The connecting assembly (42) comprises a connecting plate (421) vertically arranged between a pair of the shells (411), and a plurality of connecting rods (422) arranged on both sides of the connecting plate (421). One end of the connecting rod (422) is hinged to the connecting plate (421), and the other end is hinged to the outer wall of the shell (411); a plurality of the connecting rods (422) located on the same side of the connecting plate (421) are parallel to each other.
9. Plate heat exchanger cleaning device according to claim 8, characterized in that: The second sliding block (44) is slidingly arranged on the lower side of the guide rail (21), and the second linear motor (46) is connected to the second sliding block (44), so as to drive the second sliding block (44) to move along the guide rail (21); The second sliding block (44) is connected to the fixed plate (45); the pulling device (43) comprises a first winding shaft (431) arranged in the middle of the lower side of the fixed plate (45), a first pull rope (433) wound on the first winding shaft (431), and a first winding motor (432) for driving the first winding shaft (431) to rotate; the first pull rope (433) is fixedly connected to the middle of the connecting plate (421).
10. A plate heat exchanger cleaning device according to claim 9, characterized in that: The pulling device (43) further comprises a pair of second winding shafts (434) arranged at both ends of the lower side of the fixed plate (45), a second winding motor (435) for driving the second winding shaft (434) to rotate, a second pull rope (346) wound on the second winding shaft (434), and a pair of third pull ropes (437) arranged at the lower ends of the second pull rope (346); a pair of the third pull ropes (437) are respectively connected to the upper sides of a pair of the shells (411).