Corrosion-resistant plate heat exchanger

Abstract

The invention discloses a corrosion-resistant plate heat exchanger, and belongs to the technical field of heat exchange devices.The corrosion-resistant plate heat exchanger comprises an outer shell, a sealing plate is fixedly installed on the front side of the outer shell, and an electric push rod is fixedly installed in the middle of the front side of the sealing plate. After the backwashing device is stably connected with the corresponding connector, the non-washed area can be shielded by controlling the overlapping range of the connector, the flow guide groove in the side edge of the guide pipe and the separation groove, high-pressure liquid is prevented from entering different areas, and corrosion to the interior of the device is reduced; in the back washing process, the stability of the connecting position can be kept, the influence of vibration generated by the water hammer effect on the connecting position of the device is reduced, and when the pipeline is corroded and blocked after being used for a long time, the cleaning inner pipe can be quickly disassembled and cleaned, and maintenance is convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of heat exchange devices, and more particularly to a corrosion-resistant plate heat exchanger. Background Art

[0002] In industrial production and daily life, corrosion-resistant plate heat exchangers are widely used in various fields such as chemical industry, power generation, and HVAC due to their efficient heat exchange performance and excellent corrosion resistance. However, during long-term use, dirt will inevitably accumulate inside the heat exchanger, affecting its heat exchange efficiency, necessitating regular cleaning and maintenance.

[0003] A Chinese patent discloses a corrosion-resistant plate heat exchanger and a heat exchange method thereof (Announcement No. CN117433342B). The present invention provides a corrosion-resistant plate heat exchanger, wherein a plurality of connecting pipes are symmetrically fixed on the side wall of the heat exchanger body; one connecting pipe corresponds to one connecting pipe, and the end of the connecting pipe is suitable for inserting into the connecting pipe; a limiting seal is sleeved on the outer wall of the connecting pipe, and the limiting seal is clamped with the connecting pipe; wherein the limiting seal moves toward the end of the connecting pipe, and is suitable for squeezing the connecting pipe to shrink inward and deform so that the connecting pipe can be inserted into the connecting pipe; the fluid flows from the connecting pipe to the connecting pipe to flush impurities in the connecting pipe; after the limiting seal is clamped with the connecting pipe, the limiting seal is rotated circumferentially to seal the connecting pipe and the connecting pipe; the setting of the limiting seal not only simplifies the disassembly and assembly steps, but also, when installing the connecting pipe, impurities on the inner wall of the connecting pipe can be cleaned; when disassembling the connecting pipe, it can be detected whether the flexible pipe needs to be replaced.

[0004] However, during the use of this device, a common cleaning method is to use a backwash device to remove dirt through reverse water flow impact. However, existing corrosion-resistant plate heat exchangers have many problems during the backwash process. First of all, it is common that the water flow is not clean. Due to the complex internal structure of the plate heat exchanger and the tortuous flow channels, it is difficult for the backwash water flow to cover all areas, resulting in some dirt residue. These residual dirt will not only continue to affect the heat exchange efficiency, but long-term accumulation may also cause flow channel blockage, further reducing equipment performance. For example, in chemical production, some highly viscous dirt adheres to the surface of the heat exchanger plate, and ordinary backwash water flow is difficult to completely remove it, causing the heat transfer coefficient of the heat exchanger to gradually decrease, affecting the stability of the production process;

[0005] During the backwash process, wastewater can enter unflushed areas or flow channels through various gaps and holes. This cross-contamination is particularly prone to occur in multi-channel, multi-flow plate heat exchangers. Once cross-contamination occurs, it not only contaminates previously clean areas but can also cause the mixing of fluids of different properties, triggering chemical reactions and damaging the heat exchanger's plates and seals. Summary of the Invention

[0006] The object of the present invention is to provide a corrosion-resistant plate heat exchanger to solve the problems raised in the above background technology.

[0007] A corrosion-resistant plate heat exchanger comprises an outer shell, a sealing plate fixedly mounted on the front side of the outer shell, an electric push rod fixedly mounted on the middle portion of the front side of the sealing plate, a sliding adjustment plate fixedly mounted on the front side of the electric push rod, guide tubes provided at the four corners of the upper side of the sealing plate, a cleaning inner tube provided inside the guide tube, an electric push rod fixedly mounted on the middle portion of the front side of the sealing plate, a sliding adjustment plate fixedly mounted on the front end of the electric push rod, and sensing devices provided at the upper and lower ends of the rear side of the sealing plate;

[0008] A heat exchange plate assembly is fixedly installed on the inner side of the outer shell, a main control unit is fixedly installed on the front upper side of the sealing plate, a main control module is mounted inside the main control unit, and a telescopic module, a sensing module and an adjustment module are provided at the input end of the main control module.

[0009] Furthermore, fixing heads are fixedly installed at the four front corners of the sealing plate, and thread grooves are provided on the outer sides of the fixing heads.

[0010] By adopting the above technical solution, the installer can set a sealing device on the outside of the fixed head to prevent the internal liquid from leaking at the connection position after long-term use.

[0011] Furthermore, the heat exchange plate assembly includes a first heat exchange plate arranged inside the outer shell, a second heat exchange plate is arranged on the front side of the first heat exchange plate, first guide grooves are opened on both sides of the first heat exchange plate, and second guide grooves are opened on the side of the second heat exchange plate.

[0012] By adopting the above technical solution, heat exchange operation can be performed on the liquid through the structure of the first heat exchange plate and the second heat exchange plate. The first guide groove and the second guide groove have different groove directions, so that liquids in different directions can be guided.

[0013] Furthermore, the first guide groove opened on the side of the first heat exchange plate and the second guide groove opened on the side of the second heat exchange plate can reversely guide the liquid passing through them, and circular groove structures are opened at the four corners of the first heat exchange plate and the second heat exchange plate. The first heat exchange plate and the second heat exchange plate are stacked, and a first isolation piece is provided on the side of the first heat exchange plate, and a second isolation piece is provided on the side of the second heat exchange plate.

[0014] By adopting the above technical solution, the first isolator and the second isolator can separate and guide the liquids flowing through the first heat exchange plate and the second heat exchange plate, so that different liquids can flow alternately and finally be reasonably guided to dissipate heat.

[0015] Furthermore, a number of guide grooves are equidistantly provided on both sides of the guide tube, auxiliary connecting grooves are provided on the left and right sides of the guide groove, and separation grooves corresponding to the guide grooves are provided on both sides of the cleaning inner tube, and the separation grooves provided on the cleaning inner tube correspond crosswise to the guide grooves.

[0016] By adopting the above technical solution, when the cleaning inner tube moves horizontally inside the guide tube, its separation groove will cross-block the guide groove opened in the guide tube, thereby controlling different insertion depths and blocking different guide groove spaces, and ultimately sealing and protecting the guide groove that does not backflushed, reducing the impact of high-pressure liquid on the internal structure.

[0017] Furthermore, connectors are fixedly installed at the four front corners of the sliding adjustment plate, and threads are provided inside the connectors.

[0018] By adopting the above technical solution, the connector can conveniently connect the heat exchange pipe and the backwash pipe, and increase the stability of the connection position.

[0019] Furthermore, a limit baffle is fixedly installed on the front end of the guide tube, and a limit bolt is fixedly installed on the rear side of the sliding adjustment plate at a corresponding position of the limit baffle.

[0020] By adopting the above technical solution, when the sliding adjustment plate contacts the limiting baffle, the limiting bolt will buffer the contact position to prevent the sliding adjustment plate from being bumped and deformed during the extension and retraction process.

[0021] Furthermore, the sensing device includes detection plates arranged at the upper and lower ends of the rear side of the sealing plate, a pair of sensing parts are fixedly installed on both sides of the lower end of the detection plate, and infrared emitters corresponding to the sensing parts are fixedly installed on the side of the guide tube.

[0022] By adopting the above technical solution, the position of the infrared emitter can be detected by the sensing element on the lower side of the detection plate. When the position of the infrared emitter moves forward and backward, its sensing module receives the signal, so that the telescopic module can be moved and controlled by the main control module to achieve the connection and protection of different pipe heat pipes.

[0023] Furthermore, one end of the electric push rod is welded and fixed to the front side of the sealing plate, and the output end of the electric push rod of the main control is fixedly connected to the sliding adjustment plate through a bolt.

[0024] By adopting the above technical solution, when the heat exchange plate assembly inside the outer shell needs to be disassembled and cleaned, the operator can separate the electric push rod and the sliding adjustment plate, thereby facilitating subsequent cleaning activities.

[0025] Compared with the prior art, the advantages of the present invention are:

[0026] 1. In the present invention, by providing a structure for cleaning the inner tube, when cleaning is required, after the backwash device is stably connected to the corresponding connector, the overlapping range of the guide groove and the separation groove on the side of the connector and the guide tube can be controlled, so that the unwashed area can be shielded, thereby preventing high-pressure liquid from entering different areas and reducing corrosion inside the device.

[0027] 2. In the present invention, by providing a structure with a sliding adjustment plate, the connection position can be kept stable during the backwash process, reducing the impact of vibration caused by water hammer on the connection position of the device. When the pipeline is corroded and blocked after long-term use, the cleaning inner pipe can be quickly disassembled and cleaned, which is convenient for maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 A cross-sectional view of the overall structure of the present invention;

[0030] Figure 3 For the present invention Figure 2 A magnified view of the structure at point A;

[0031] Figure 4 It is a structural schematic diagram of the guide tube of the present invention;

[0032] Figure 5 An exploded view of the overall structure of the present invention;

[0033] Figure 6 This is a structural exploded view of the heat exchange plate assembly of the present invention;

[0034] Figure 7 It is a structural schematic diagram of the guide tube of the present invention;

[0035] Figure 8 This is a schematic structural diagram of the cleaning inner tube of the present invention;

[0036] Figure 9 It is a schematic diagram of the module structure of the present invention.

[0037] Explanation of the numbers in the figure: 1. Main control; 2. Outer shell; 3. Electric push rod; 4. Fixed head; 5. Guide tube; 6. Connecting head; 7. Sliding adjustment plate; 8. Cleaning inner tube; 9. Sealing plate; 10. Heat exchange plate assembly; 1001. First heat exchange plate; 1002. First isolation member; 1003. Second heat exchange plate; 1004. First guide groove; 1005. Second guide groove; 1006. Second isolation member; 11. Limit bolt; 12. Limit baffle; 13. Detection plate; 1301. Sensing element; 14. Infrared emitter; 15. Guide groove; 16. Auxiliary connecting groove; 17. Separation groove. DETAILED DESCRIPTION

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0039] like Figures 1-9 As shown, the embodiment of the present invention provides: comprising an outer shell 2, a sealing plate 9 is fixedly mounted on the front side of the outer shell 2, an electric push rod 3 is fixedly mounted on the middle part of the front side of the sealing plate 9, a sliding adjustment plate 7 is fixedly mounted on the front side of the electric push rod 3, a guide tube 5 is provided at the four corners of the upper side of the sealing plate 9, a cleaning inner tube 8 is provided on the inner side of the guide tube 5, an electric push rod 3 is fixedly mounted on the middle part of the front side of the sealing plate 9, a sliding adjustment plate 7 is fixedly mounted on the front end of the electric push rod 3, and sensing devices are provided at the upper and lower ends of the rear side of the sealing plate 9;

[0040] A heat exchange plate assembly 10 is fixedly installed on the inner side of the outer shell 2, and a main control unit 1 is fixedly installed on the front upper side of the sealing plate 9. The main control unit 1 is equipped with a main control module inside, and the input end of the main control module is provided with a telescopic module, a sensing module and an adjustment module;

[0041] The four corners of the front side of the sealing plate 9 are fixed with fixed heads 4. The outer side of the fixed head 4 is provided with a threaded groove. The installer can set a sealing device on the outer side of the fixed head 4 to prevent the internal liquid from leaking after long-term use at the connection position.

[0042] The heat exchange plate assembly 10 includes a first heat exchange plate 1001 disposed inside the outer shell 2. A second heat exchange plate 1003 is disposed on the front side of the first heat exchange plate 1001. First guide grooves 1004 are provided on both sides of the first heat exchange plate 1001, and second guide grooves 1005 are provided on the sides of the second heat exchange plate 1003. The structure of the first heat exchange plate 1001 and the second heat exchange plate 1003 enables heat exchange operations on liquids. The first guide grooves 1004 and the second guide grooves 1005 are provided in different directions, thereby guiding liquids in different directions.

[0043] The first guide groove 1004 provided on the side of the first heat exchange plate 1001 and the second guide groove 1005 provided on the side of the second heat exchange plate 1003 can reversely guide the liquid passing through them, and the four corners of the first heat exchange plate 1001 and the second heat exchange plate 1003 are provided with a circular groove structure. The first heat exchange plate 1001 and the second heat exchange plate 1003 are stacked. The side of the first heat exchange plate 1001 is provided with a first isolation member 1002, and the side of the second heat exchange plate 1003 is provided with a second isolation member 1006. The first isolation member 1002 and the second isolation member 1006 can separate and guide the liquids flowing through the first heat exchange plate 1001 and the second heat exchange plate 1003, so that different liquids can circulate in an interlaced manner and ultimately be reasonably guided to dissipate heat;

[0044] A plurality of guide grooves 15 are equidistantly provided on both sides of the guide tube 5. Auxiliary communication grooves 16 are provided on the left and right sides of the guide grooves 15. Separation grooves 17 corresponding to the guide grooves 15 are provided on both sides of the cleaning inner tube 8. The separation grooves 17 provided on the cleaning inner tube 8 cross and correspond to the guide grooves 15. When the cleaning inner tube 8 moves horizontally inside the guide tube 5, its separation grooves 17 will cross and block the guide grooves 15 provided on the guide tube 5, thereby controlling different insertion depths and blocking different guide groove 15 spaces. Ultimately, the guide grooves 15 that are not backflushed can be sealed and protected, thereby reducing the impact of high-pressure liquid on the internal structure.

[0045] The four front corners of the sliding adjustment plate 7 are fixedly mounted with connectors 6, the interior of which is provided with threads. The connectors 6 can be conveniently connected to the heat exchange pipe and the backwash pipe, thereby increasing the stability of the connection position.

[0046] A limit baffle 12 is fixedly installed at the front end of the guide tube 5, and a limit bolt 11 is fixedly installed at the rear side of the sliding adjustment plate 7 at a position corresponding to the limit baffle 12. When the sliding adjustment plate 7 contacts the limit baffle 12, the limit bolt 11 will buffer the contact position to prevent the sliding adjustment plate 7 from bumping and deforming during the extension and retraction process.

[0047] The sensing device includes a detection plate 13 provided at the upper and lower ends of the rear side of the sealing plate 9. A pair of sensing elements 1301 are fixedly installed on both sides of the lower end of the detection plate 13. An infrared emitter 14 corresponding to the sensing element 1301 is fixedly installed on the side of the guide tube 5. The position of the infrared emitter 14 can be detected by the sensing element 1301 on the lower side of the detection plate 13. When the position of the infrared emitter 14 moves forward and backward, its sensing module receives a signal, so that the telescopic module can be moved and controlled by the main control module to achieve connection and protection of different pipe heat pipes;

[0048] One end of the electric push rod 3 is welded and fixed to the front side of the sealing plate 9, and the output end of the electric push rod 3 of the main control 1 is threadedly fixed to the sliding adjustment plate 7 through a bolt. When the heat exchange plate assembly 10 inside the outer shell 2 needs to be disassembled and cleaned, the operator can separate the electric push rod 3 and the sliding adjustment plate 7, thereby facilitating subsequent cleaning activities.

[0049] Working principle of the present invention: When the device is in use, the operator can connect the connector 6 on the same side to the corresponding heat dissipation liquid and heat dissipation medium pipes. When the device is working to dissipate heat, the main control module in the main control unit 1 will control the electric push rod 3 to extend forward through the telescopic module. The electric push rod 3 will drive the cleaning inner tube 8 to extend forward as a whole through the sliding adjustment plate 7, so that the separation groove 17 on the side of the cleaning inner tube 8 is completely separated from the guide groove 15 on the side of the guide tube 5, avoiding the separation groove 17 affecting the normal liquid flow of the guide groove 15. Since the heat exchange plate assembly 10 includes The first heat exchange plate 1001 is provided inside the outer shell 2, and the second heat exchange plate 1003 is provided on the front side of the first heat exchange plate 1001. The first guide grooves 1004 are provided on both sides of the first heat exchange plate 1001, and the second guide grooves 1005 are provided on the side of the second heat exchange plate 1003. Through the structure of the first heat exchange plate 1001 and the second heat exchange plate 1003, heat exchange operation can be performed on the liquid. The groove directions of the first guide groove 1004 and the second guide groove 1005 are different, so that liquids in different directions can be guided, and the first heat exchange plate 1001 The first guide groove 1004 opened on the side of 001 and the second guide groove 1005 opened on the side of the second heat exchange plate 1003 can reverse the flow of the liquid passing through them, and the four corners of the first heat exchange plate 1001 and the second heat exchange plate 1003 are provided with a circular groove structure. The first heat exchange plate 1001 and the second heat exchange plate 1003 are stacked. The side of the first heat exchange plate 1001 is provided with a first isolation member 1002, and the side of the second heat exchange plate 1003 is provided with a second isolation member 1006. The first isolation member 1002 and the second isolation member 1006 can The liquids flowing through the first heat exchange plate 1001 and the second heat exchange plate 1003 are separated and directed, so that different liquids can circulate alternately. The liquid in the pipe of the connector 6 on the same side will only pass through the corresponding first heat exchange plate 1001 and second heat exchange plate 1003. Therefore, the connector 6 on one side is connected to the liquid to be heat exchanged, and the connector 6 on the other side is connected to the medium liquid. When the liquids on both sides enter the interior of the outer shell 2 at the same time, their heat will be exchanged through the first heat exchange plate 1001 and the second heat exchange plate 1003, thereby achieving the purpose of effective heat exchange.

[0050] When the device needs to be cleaned after being used for a period of time, the main control module in the main control unit 1 controls the telescopic module to start, and the telescopic module controls the electric push rod 3 to retract, so that the sliding adjustment plate 7 as a whole moves closer to the outer shell 2. When the cleaning inner tube 8 is gradually inserted into the guide tube 5, the separation grooves 17 on the side of the cleaning inner tube 8 will be staggered and blocked with the guide grooves 15, and the distance between the separation grooves 17 is twice that of the guide grooves 15. Therefore, when the separation grooves 17 are fully inserted into the guide grooves 15, the slots separated by the guide grooves 15 can be blocked, and the unblocked guide grooves 15 correspond to the flow diversion paths on the same side of the heat exchange plate assembly 10;

[0051] At this time, the high-pressure backwashing device is connected to the connector 6 on the corresponding side. When the backwashing device uses cleaning fluid to flush the rust residue inside the heat exchange plate assembly 10, the adjacent liquid space inside the heat exchange plate assembly 10 is completely blocked by the cleaning inner tube 8, thereby effectively preventing the cleaning liquid from seeping into the adjacent space due to the high-pressure water flow and causing further corrosion. When the passage of the connector 6 on one side of the sliding adjustment plate 7 is cleaned, it can sense the module through the main control 1. The sensing device includes a detection plate 13 arranged at the upper and lower ends of the rear side of the sealing plate 9. A pair of sensing elements 1301 are fixedly installed on both sides of the lower end of the detection plate 13. An infrared emitter 14 corresponding to the sensing element 1301 is fixedly installed on the side of the guide tube 5. The position of the infrared emitter 14 can be detected by the sensing element 1301 on the lower side of the detection plate 13. When the position of the infrared emitter 14 moves forward and backward, its sensing module receives a signal, so that the telescopic module can be moved and controlled by the main control module. The sensing module, wherein when the cleaning inner tube 8 is fully inserted into the guide tube 5, the infrared emitter 14 and the detection plate 13 is aligned with the sensing piece 1301 on the rear side of the detection plate 13. When one side is flushed, the adjustment module controls the electric push rod 3 to drive the sliding adjustment plate 7 forward until the infrared emitter 14 moves to the position of the sensing piece 1301 on the front side of the detection plate 13. At this time, the separation groove 17 moves forward to block the adjacent guide groove 15. Inside the heat exchange plate assembly 10, its internal passage becomes the space connected by the connector 6 on the other side of the sliding adjustment plate 7. The operator can fix the cleaning device to the connector 6 on the other side of the sliding adjustment plate 7, replace the corresponding cleaning agent, and then clean the passage on the other side, so as to shield the unwashed area, prevent high-pressure liquid from entering different areas, and reduce corrosion inside the device. By providing a structure with a replaceable cleaning inner tube 8, the cleaning inner tube 8 can be easily disassembled. At the same time, multiple cleaning inner tubes 8 are connected by the sliding adjustment plate 7, which can effectively make the guide tubes 5 and the cleaning inner tube 8 at the four corners more stable during use, reduce the influence of the water hammer effect on the pipeline vibration, and reduce loosening and leakage at the connection position.

[0052] The basic principles, main features, and advantages of the present invention are shown and described above. It should be understood by those skilled in the art that the present invention is not limited to the above-described embodiments. The above-described embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications fall within the scope of the invention claimed.

Claims

1. A corrosion-resistant plate heat exchanger, comprising an outer shell (2), characterized in that: A sealing plate (9) is fixedly mounted on the front side of the outer shell (2), an electric push rod (3) is fixedly mounted on the middle of the front side of the sealing plate (9), a sliding adjustment plate (7) is fixedly mounted on the front side of the electric push rod (3), a guide tube (5) is provided at the four corners of the upper side of the sealing plate (9), a cleaning inner tube (8) is provided on the inner side of the guide tube (5), an electric push rod (3) is fixedly mounted on the middle of the front side of the sealing plate (9), a sliding adjustment plate (7) is fixedly mounted on the front end of the electric push rod (3), and sensing devices are provided at the upper and lower ends of the rear side of the sealing plate (9); A heat exchange plate assembly (10) is fixedly mounted on the inner side of the outer shell (2), a main control unit (1) is fixedly mounted above the front side of the sealing plate (9), a main control module is mounted inside the main control unit (1), and a telescopic module, a sensing module, and an adjustment module are provided at the input end of the main control module.

2. The corrosion-resistant plate heat exchanger according to claim 1, characterized in that: The four front corners of the sealing plate (9) are fixedly mounted with fixing heads (4), and the outer side of the fixing head (4) is provided with a threaded groove.

3. The corrosion-resistant plate heat exchanger according to claim 1, characterized in that: The heat exchange plate assembly (10) comprises a first heat exchange plate (1001) arranged inside an outer shell (2); a second heat exchange plate (1003) is arranged on the front side of the first heat exchange plate (1001); first guide grooves (1004) are provided on both sides of the first heat exchange plate (1001); and second guide grooves (1005) are provided on the side of the second heat exchange plate (1003).

4. The corrosion-resistant plate heat exchanger according to claim 3, characterized in that: The first guide groove (1004) opened on the side of the first heat exchange plate (1001) and the second guide groove (1005) opened on the side of the second heat exchange plate (1003) can reversely guide the liquid passing through them, and the four corners of the first heat exchange plate (1001) and the second heat exchange plate (1003) are each provided with a circular groove structure. The first heat exchange plate (1001) and the second heat exchange plate (1003) are stacked, and a first isolation member (1002) is provided on the side of the first heat exchange plate (1001), and a second isolation member (1006) is provided on the side of the second heat exchange plate (1003).

5. The corrosion-resistant plate heat exchanger according to claim 1, characterized in that: A plurality of guide grooves (15) are equidistantly provided on both sides of the guide tube (5); auxiliary communication grooves (16) are provided on the left and right sides of the guide grooves (15); separation grooves (17) corresponding to the guide grooves (15) are provided on both sides of the cleaning inner tube (8); and the separation grooves (17) provided on the cleaning inner tube (8) correspond to the guide grooves (15) in a cross-corresponding manner.

6. The corrosion-resistant plate heat exchanger according to claim 1, characterized in that: Connectors (6) are fixedly mounted on the four front corners of the sliding adjustment plate (7), and threads are provided inside the connectors (6).

7. The corrosion-resistant plate heat exchanger according to claim 1, characterized in that: A limit baffle (12) is fixedly installed on the front end of the guide tube (5), and a limit bolt (11) is fixedly installed on the rear side of the sliding adjustment plate (7) at a corresponding position of the limit baffle (12).

8. The corrosion-resistant plate heat exchanger according to claim 1, characterized in that: The sensing device comprises a detection plate (13) arranged at the upper and lower ends of the rear side of the sealing plate (9); a pair of sensing elements (1301) are fixedly mounted on both sides of the lower end of the detection plate (13); and an infrared emitter (14) corresponding to the sensing elements (1301) is fixedly mounted on the side of the guide tube (5).

9. The corrosion-resistant plate heat exchanger according to claim 1, characterized in that: One end of the electric push rod (3) is welded and fixed to the front side of the sealing plate (9), and the output end of the electric push rod (3) of the main control (1) is threadedly fixedly connected to the sliding adjustment plate (7) through a bolt.

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