A corrosion-resistant plate heat exchanger

Abstract

This invention discloses a corrosion-resistant plate heat exchanger, belonging to the technical field of heat exchange devices. The corrosion-resistant plate heat exchanger includes an outer shell, with a sealing plate fixedly installed on the front side of the outer shell. An electric push rod is fixedly installed in the middle of the front side of the sealing plate. Through the structure of a cleaning inner tube, when cleaning is required, after the backwashing device is stably connected to the corresponding connector, the overlap range of the guide groove and separation groove on the side of the connector and guide tube can be controlled to shield unwashed areas, preventing high-pressure liquid from entering different areas and reducing corrosion inside the device. The structure of a sliding adjustment plate can maintain the stability of the connection position during backwashing, reducing the impact of water hammer vibration on the connection position. When the pipe becomes corroded and clogged after prolonged use, the cleaning inner tube can be quickly disassembled and cleaned for convenient maintenance.

Description

Technical Field

[0001] This invention relates to the field of heat exchange device technology, and more specifically, to a corrosion-resistant plate heat exchanger. Background Technology

[0002] In industrial production and daily life, corrosion-resistant plate heat exchangers are widely used in chemical, power, and HVAC industries due to their high heat exchange efficiency and excellent corrosion resistance. However, during long-term use, scale inevitably accumulates inside the heat exchanger, affecting its heat exchange efficiency, thus requiring regular cleaning and maintenance.

[0003] Chinese patent discloses a corrosion-resistant plate heat exchanger and its heat exchange method (publication number CN117433342B). This invention provides a corrosion-resistant plate heat exchanger with several connecting pipes symmetrically fixed to the side wall of the heat exchanger body. One connecting pipe corresponds to one connecting pipe, and the end of the connecting pipe is adapted to be inserted into the connecting pipe. A limiting seal is sleeved on the outer wall of the connecting pipe and engages with the connecting pipe. The limiting seal moves towards the end of the connecting pipe, adapting to compress the connecting pipe into an inward contraction deformation, allowing the connecting pipe to be inserted into the connecting pipe. Fluid flows from the connecting pipe into the connecting pipe to flush away impurities inside the connecting pipe. After the limiting seal engages with the connecting pipe, the limiting seal rotates circumferentially to seal the connecting pipe and the connecting pipe. The limiting seal simplifies the assembly and disassembly process and allows for the cleaning of impurities from the inner wall of the connecting pipe during installation. It also allows for the detection of whether the flexible pipe needs replacement during disassembly.

[0004] However, the common cleaning method for this device during use is backwashing, which removes dirt by impacting with reverse water flow. However, existing corrosion-resistant plate heat exchangers have several problems during backwashing. First, incomplete rinsing is quite common. Due to the complex internal structure and tortuous flow channels of plate heat exchangers, backwash water flow cannot cover all areas, resulting in some dirt residue. This residual dirt not only continuously affects heat exchange efficiency, but long-term accumulation can also lead to flow channel blockage, further reducing equipment performance. For example, in chemical production, some highly viscous dirt adheres to the surface of the heat exchanger plates, which ordinary backwash water flow cannot completely remove, causing the heat transfer coefficient of the heat exchanger to gradually decrease and affecting the stability of the production process.

[0005] During backwashing, wastewater may enter other unwashed areas or channels through various gaps and holes. This cross-contamination is especially likely to occur in multi-channel, multi-flow plate heat exchangers. Once cross-contamination occurs, not only will previously clean areas become contaminated again, but it may also cause fluids of different properties to mix, triggering chemical reactions and damaging the heat exchanger plates and sealing components. Summary of the Invention

[0006] The purpose of this invention is to provide a corrosion-resistant plate heat exchanger to solve the problems mentioned in the background art.

[0007] A corrosion-resistant plate heat exchanger includes an outer shell, a sealing plate fixedly installed on the front side of the outer shell, an electric push rod fixedly installed in the middle of the front side of the sealing plate, a sliding adjustment plate fixedly installed on the front side of the electric push rod, guide tubes provided at the four upper corners of the sealing plate, a cleaning inner tube provided inside the guide tubes, 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, and a main control unit is fixedly installed on the upper front side of the sealing plate. The main control unit contains a main control module, and the input end of the main control module is provided with a telescopic module, a sensing module, and an adjustment module.

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

[0010] By adopting the above technical solution, installers can install a sealing device on the outside of the fixing head to prevent internal liquid leakage at the connection point after long-term use.

[0011] Furthermore, the heat exchange plate assembly includes a first heat exchange plate disposed inside the outer casing, a second heat exchange plate disposed on the front side of the first heat exchange plate, a first guide groove being formed on both sides of the first heat exchange plate, and a second guide groove being formed on the side of the second heat exchange plate.

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

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

[0014] By adopting the above technical solution, the first and second isolation components can separate and guide the liquids flowing through the first and second heat exchange plates, thereby allowing different liquids to flow in an alternating manner and ultimately achieve reasonable guidance for heat dissipation.

[0015] Furthermore, a plurality of flow channels are equidistantly provided on both sides of the guide tube, and auxiliary connecting channels are provided on the left and right sides of the guide tube located on the flow channels. Separation channels corresponding to the flow channels are provided on both sides of the cleaning inner tube, and the separation channels provided on the cleaning inner tube are cross-corresponding to the flow channels.

[0016] By adopting the above technical solution, when the cleaning inner tube moves horizontally inside the guide tube, its separation groove will cross and block the guide groove opened in the guide tube, thereby controlling different insertion depths and blocking different guide groove spaces. Finally, the guide groove that does not undergo backflushing can be sealed and protected, 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 the connectors are threaded inside.

[0018] By adopting the above technical solution, the connector can easily connect heat exchange pipes and backflushing pipes, increasing the stability of the connection position.

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

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

[0021] Furthermore, the sensing device includes a detection plate disposed at the upper and lower ends of the rear side of the sealing plate, a pair of sensing elements are fixedly installed on both sides of the lower end of the detection plate, and an infrared emitter corresponding to the sensing element is fixedly installed on the side of the guide tube.

[0022] By adopting the above technical solution, the position of the infrared transmitter can be detected by the sensor on the lower side of the detection board. When the infrared transmitter moves forward or backward, its sensing module receives the signal, so the telescopic module can be moved and controlled by the main control module to realize the connection and protection of different 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 controlled by the main controller is threadedly connected to the sliding adjustment plate by bolts.

[0024] By adopting the above technical solution, when the heat exchange plate assembly inside the outer casing needs to be disassembled for cleaning, 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 this invention are:

[0026] 1. In this invention, by setting a structure with a cleaning inner tube, when cleaning is required, after the backwashing device is stably connected to the corresponding connector, the overlap range of the guide groove and separation groove on the side of the connector and guide tube can be controlled to shield the unwashed area, prevent high-pressure liquid from entering different areas, and reduce corrosion inside the device.

[0027] 2. In this invention, by setting a structure with a sliding adjustment plate, the connection position can be kept stable during backwashing, reducing the impact of vibration caused by water hammer on the connection position of the device. When the pipe is corroded and blocked after long-term use, the inner pipe can be quickly disassembled and cleaned, which is convenient for maintenance. Attached Figure Description

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

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

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

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

[0032] Figure 5 This is an exploded view of the overall structure of the present invention;

[0033] Figure 6 This is an exploded view of the heat exchanger plate assembly of the present invention;

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

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

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

[0037] The following are the labeling instructions in the diagram: 1. Main control unit; 2. Outer shell; 3. Electric push rod; 4. Fixing 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 component; 1003. Second heat exchange plate; 1004. First guide groove; 1005. Second guide groove; 1006. Second isolation component; 11. Limit bolt; 12. Limit baffle; 13. Detection plate; 1301. Sensor; 14. Infrared emitter; 15. Flow guide groove; 16. Auxiliary connecting groove; 17. Separation groove. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] like Figures 1-9 As shown, the embodiment of the present invention provides: including an outer shell 2, a sealing plate 9 fixedly installed on the front side of the outer shell 2, an electric push rod 3 fixedly installed in the middle of the front side of the sealing plate 9, a sliding adjustment plate 7 fixedly installed on the front side of the electric push rod 3, guide tubes 5 provided at the four corners of the upper side of the sealing plate 9, a cleaning inner tube 8 provided inside the guide tubes 5, and sensing devices 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 upper front side of the sealing plate 9. The main control unit 1 is equipped with a main control module, and the input end of the main control module is provided with a telescopic module, a sensing module and an adjustment module.

[0041] Fixing heads 4 are fixedly installed at the four corners of the front side of the sealing plate 9. Threaded grooves are provided on the outside of the fixing heads 4. Installers can install sealing devices on the outside of the fixing heads 4 to prevent internal liquid leakage at the connection point after long-term use.

[0042] The heat exchange plate assembly 10 includes a first heat exchange plate 1001 disposed inside the outer casing 2, a second heat exchange plate 1003 disposed on the front side of the first heat exchange plate 1001, first guide grooves 1004 are opened on both sides of the first heat exchange plate 1001, and second guide grooves 1005 are opened 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 opening directions of the first guide grooves 1004 and the second guide grooves 1005 are different, so that liquids in different directions can be guided.

[0043] The first guide groove 1004 on the side of the first heat exchange plate 1001 and the second guide groove 1005 on the side of the second heat exchange plate 1003 can reverse the flow of liquid passing through them. Circular groove structures are provided at the four corners of both the first heat exchange plate 1001 and the second heat exchange plate 1003. The first heat exchange plate 1001 and the second heat exchange plate 1003 are stacked. 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. The first isolation member 1002 and the second isolation member 1006 can separate and guide the liquid flowing through the first heat exchange plate 1001 and the second heat exchange plate 1003, thereby allowing different liquids to flow in an alternating manner and ultimately achieve reasonable guidance for heat dissipation.

[0044] Several guide grooves 15 are equidistantly provided on both sides of the guide tube 5. Auxiliary connecting 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 are cross-corresponding to the guide grooves 15. When the cleaning inner tube 8 moves horizontally inside the guide tube 5, its separation grooves 17 will cross-block the guide grooves 15 provided on the guide tube 5, thereby controlling different insertion depths and blocking different guide groove 15 spaces. Finally, the guide grooves 15 that do not undergo backflushing can be sealed and protected, reducing the impact of high-pressure liquid on the internal structure.

[0045] Connectors 6 are fixedly installed at the four corners of the front side of the sliding adjustment plate 7. The connectors 6 have internal threads, which can facilitate the connection of heat exchange pipes and backwash pipes and increase 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 corresponding position of the limit baffle 12 on the rear side of the sliding adjustment plate 7. 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 being bumped and deformed during the extension and retraction process.

[0047] The sensing device includes a detection plate 13 set 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 the signal, so that the telescopic module can be moved and controlled by the main control module to realize the connection and protection of different heat pipes.

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

[0049] Working principle of this invention: When using this device, the operator can connect the connector 6 on the same side to the corresponding heat dissipation liquid and heat dissipation medium pipe. When the device is working and dissipating heat, the main control module in its 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, so as to avoid the separation groove 17 affecting the normal liquid flow of the guide groove 15. Since the heat exchange plate assembly 10 is packaged... The system includes a first heat exchange plate 1001 disposed inside the outer casing 2, and a second heat exchange plate 1003 disposed on the front side of the first heat exchange plate 1001. First guide grooves 1004 are formed on both sides of the first heat exchange plate 1001, and second guide grooves 1005 are formed 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 operations can be performed on the liquid. The first guide grooves 1004 and the second guide grooves 1005 have different opening directions, thereby guiding the liquid flow in different directions. The first guide groove 1004 on the side of the first heat exchange plate 1001 and the second guide groove 1005 on the side of the second heat exchange plate 1003 can reverse the flow of liquid passing through them. Circular groove structures are formed at the four corners of both the first heat exchange plate 1001 and the second heat exchange plate 1003. The first heat exchange plate 1001 and the second heat exchange plate 1003 are stacked. 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. 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 guided, so that different liquids can flow in an alternating manner. 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, one side connector 6 is connected to the liquid that needs to exchange heat, while the other side connector 6 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 a period of use, the telescopic module is activated by the main control module in the main control unit 1. The telescopic module controls the electric push rod 3 to retract, so that the sliding adjustment plate 7 moves closer to the outer shell 2. As the cleaning inner tube 8 is gradually inserted into the guide tube 5, the separation groove 17 on the side of the cleaning inner tube 8 will intersect and block the flow guide 15. The distance between the separation grooves 17 is twice that of the flow guide 15. Thus, when the separation groove 17 is fully inserted into the flow guide 15, it can block the slots of the flow guide 15. The unblocked flow guide 15 corresponds to the flow guide passage on the same side of the heat exchange plate assembly 10.

[0051] At this time, the high-pressure backwashing device is connected to the corresponding connector 6 on the same 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, which can effectively prevent the cleaning fluid from seeping into the adjacent space and causing further corrosion. After 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 set at the upper and lower ends of the back 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 the signal, so the telescopic module can be moved and controlled by the main control module. The sensing module, when the cleaning inner tube 8 is fully inserted into the guide tube 5, the infrared emitter 14 and the detection plate The sensors 1301 on the rear side of the detection plate 13 are aligned. After one side is rinsed, the adjustment module controls the electric push rod 3 to move the sliding adjustment plate 7 forward until the infrared emitter 14 moves to the position of the sensor 1301 on the front side of the detection plate 13. At this time, the separation tank 17 moves forward to block the adjacent guide tank 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, change the corresponding cleaning agent, and then clean the passage on the other side. This can block and shield the unrinsed area, prevent high-pressure liquid from entering different areas, and reduce corrosion inside the device. By setting a structure with replaceable cleaning inner tubes 8, the cleaning inner tubes 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 at the four corners and the cleaning inner tubes 8 more stable during use, reduce the impact of water hammer effect on pipe vibration, and reduce loosening and leakage at the connection position.

[0052] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A corrosion-resistant plate heat exchanger, comprising an outer shell (2), characterized in that: A sealing plate (9) is fixedly installed on the front side of the outer shell (2). An electric push rod (3) is fixedly installed in the middle of the front side of the sealing plate (9). A sliding adjustment plate (7) is fixedly installed on the front side of the electric push rod (3). Guide tubes (5) are provided at the four corners of the upper side of the sealing plate (9). A cleaning inner tube (8) is provided inside the guide tube (5). A sensing device is provided at the upper and lower ends of the rear side of the sealing plate (9). A heat exchange plate assembly (10) is fixedly installed on the inner side of the outer shell (2). A main control unit (1) is fixedly installed on the upper front side of the sealing plate (9). The main control unit (1) is equipped with a main control module. The input end of the main control module is provided with a telescopic module, a sensing module and an adjustment module. Several guide grooves (15) are equidistantly opened on both sides of the guide tube (5). Auxiliary connecting grooves (16) are opened on the left and right sides of the guide tube (5) located in the guide grooves (15). Separation grooves (17) corresponding to the guide grooves (15) are opened on both sides of the cleaning inner tube (8). The separation grooves (17) opened on the cleaning inner tube (8) are cross-corresponding to the guide grooves (15).

2. The corrosion-resistant plate heat exchanger according to claim 1, characterized in that: The sealing plate (9) is fixedly installed with fixing heads (4) at the four corners of the front side, and the fixing heads (4) are provided with threaded grooves on the outside.

3. The corrosion-resistant plate heat exchanger according to claim 1, characterized in that: 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) disposed on the front side of the first heat exchange plate (1001), a first guide groove (1004) being provided on both sides of the first heat exchange plate (1001), and a second guide groove (1005) being provided on the side of the second heat exchange plate (1003).

4. A corrosion-resistant plate heat exchanger according to claim 3, characterized in that: The first guide groove (1004) on the side of the first heat exchange plate (1001) and the second guide groove (1005) on the side of the second heat exchange plate (1003) can reverse the flow of the liquid passing through them. The four corners of the first heat exchange plate (1001) and the second heat exchange plate (1003) are provided with circular groove structures. 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).

5. A corrosion-resistant plate heat exchanger according to claim 1, characterized in that: Connectors (6) are fixedly installed at the four corners of the front side of the sliding adjustment plate (7), and the connectors (6) are threaded inside.

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

7. A corrosion-resistant plate heat exchanger according to claim 1, characterized in that: The sensing device includes a detection plate (13) set 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).

8. A 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 unit (1) is threadedly connected to the sliding adjustment plate (7) by bolts.

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