A plate connecting reinforcing structure of a full-welded plate heat exchanger

Abstract

This utility model provides a plate connection reinforcement structure for a fully welded plate heat exchanger, belonging to the technical field of connection reinforcement structures. This plate connection reinforcement structure includes adjacent plates, wherein: an oblique tie rod is provided at the connection point of the adjacent plates. The oblique tie rod is fixed to the edge of the plate by welding or threaded connection. The oblique tie rod is arranged obliquely. By adjusting the length and angle of the oblique tie rod, the adjacent plates are tightly connected together. One end of the oblique tie rod is fixed to the edge of one plate, and the other end is fixed to the edge of another plate. The connection point of the oblique tie rod and the plate forms a non-perpendicular angle. The cross-sectional shape of the oblique tie rod is circular, rectangular, or elliptical. This solves the problems of insufficient connection strength and poor stability at the plate connection point in traditional fully welded plate heat exchangers due to welding stress concentration, thermal expansion differences, and vibration.

Description

Technical Field

[0001] This utility model belongs to the field of connection and reinforcement structure technology, specifically, it relates to a plate connection and reinforcement structure for a fully welded plate heat exchanger. Background Technology

[0002] All-welded plate heat exchangers are highly efficient heat exchange devices widely used in industrial production, energy conversion, refrigeration and air conditioning, and other fields. Their core component is the plates, through which heat is transferred via contact and connection. The plates are typically made of stainless steel or other corrosion-resistant metals, offering high heat transfer efficiency and excellent corrosion resistance. In an all-welded plate heat exchanger, the plates are welded together to form a single, integrated heat exchange unit.

[0003] Traditional all-welded plate heat exchangers rely primarily on welding for reinforcement of the plate connections. While welding provides high connection strength, it also has several drawbacks. First, the thermal stress generated during welding can cause plate deformation, affecting the overall performance of the heat exchanger. Second, welded areas are prone to fatigue cracks during long-term operation, especially under frequent temperature and pressure fluctuations, which reduces the heat exchanger's lifespan. Furthermore, welding requires a high level of operator skill, and inconsistent weld quality can lead to insufficient strength at the connections. Finally, once the welded connection is complete, the plates are difficult to disassemble, causing significant inconvenience for heat exchanger maintenance and replacement. Utility Model Content

[0004] In view of this, the present invention provides a plate connection reinforcement structure for a fully welded plate heat exchanger, which solves the problems of insufficient connection strength and poor stability in traditional fully welded plate heat exchangers caused by factors such as welding stress concentration, thermal expansion differences and vibration at the plate connection points.

[0005] This utility model is implemented as follows: This utility model provides a plate connection reinforcement structure for a fully welded plate heat exchanger, including adjacent plates, wherein: an oblique tie rod is provided at the connection part of the adjacent plates, the oblique tie rod is fixed to the edge of the plate by welding or threaded connection, the oblique tie rod is arranged obliquely, and by adjusting the length and angle of the oblique tie rod, the adjacent plates are tightly connected together.

[0006] The technical advantages of the plate connection reinforcement structure for a fully welded plate heat exchanger provided by this utility model are as follows: This utility model achieves a tight connection between adjacent plates by setting diagonal tie rods at the connection points and fixing the tie rods using welding or threaded connections. This structure effectively enhances the bending stiffness and shear strength of the plate connection points, disperses stress, and avoids stress concentration, thereby improving the stability and reliability of the connection. The design of the diagonal tie rods allows for adjustment of the length and angle of the tie rods to accommodate plates of different sizes and shapes, enhancing the flexibility and applicability of the structure. During use, simply install the tie rods on the edge of the plates and adjust the length and angle of the tie rods as needed to achieve quick assembly and a stable connection.

[0007] Based on the above technical solution, the plate connection reinforcement structure of the all-welded plate heat exchanger of this utility model can be further improved as follows: One end of the diagonal tie rod is fixed to the edge of a plate, and the other end is fixed to the edge of another plate. The connection between the diagonal tie rod and the plate forms a non-perpendicular angle.

[0008] The beneficial effects of the above-mentioned improved solution are as follows: by fixing one end of the diagonal tie rod to the edge of one plate and the other end to the edge of another plate, and making the connection between the tie rod and the plate form a non-perpendicular angle, this invention can further optimize stress distribution. This diagonal arrangement can effectively reduce stress concentration caused by thermal expansion or pressure changes, thereby extending the service life of the heat exchanger. During installation, the user can adjust the angle of the tie rod according to the actual size of the plates and operating requirements to ensure a tight fit between adjacent plates, while avoiding plate deformation caused by vertical tension.

[0009] Furthermore, the cross-sectional shape of the diagonal tie rod is circular, rectangular, or elliptical, and the length and angle of the diagonal tie rod can be adjusted according to the size and shape of the plate.

[0010] The beneficial effects of adopting the above-mentioned improved scheme are as follows: the inclined tie rod of this utility model has various cross-sectional shapes (such as circular, rectangular, or elliptical), and the length and angle of the tie rod can be adjusted according to the size and shape of the plate. This design provides greater flexibility, enabling the reinforcement structure to adapt to plates of different specifications and different installation environments. In practical applications, users can select a suitable tie rod cross-sectional shape and adjust the length and angle of the tie rod according to the specific design and operating conditions of the heat exchanger to achieve the best connection effect and structural stability.

[0011] Furthermore, there are multiple diagonal tie rods, which are evenly distributed along the edge of the plate, and the spacing between adjacent diagonal tie rods is equal.

[0012] The beneficial effects of the above-mentioned improved solution are as follows: By setting multiple diagonal tie rods and distributing them evenly along the edges of the plates, this invention can further enhance the overall stability of the connection. The even distribution of multiple tie rods can more effectively disperse stress and avoid connection failure caused by excessive local stress. During installation, the user only needs to evenly install multiple tie rods on the edges of the plates and adjust the length and angle of each tie rod to ensure that adjacent plates fit tightly in the entire connection area, thereby improving the overall performance and reliability of the heat exchanger.

[0013] When the diagonal tie rod is fixed to the edge of the plate by welding, a reinforcing weld is provided at the welding point, and the length of the reinforcing weld is greater than twice the diameter of the diagonal tie rod.

[0014] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: When the diagonal tie rod is fixed to the edge of the plate by welding, the addition of a reinforcing weld can significantly improve the strength and reliability of the welded area. The length of the reinforcing weld is greater than twice the diameter of the tie rod, effectively preventing cracks or fractures at the welded area due to stress concentration. This design ensures a firm connection between the tie rod and the plate, enhancing the stability of the entire reinforced structure. In practical operation, when welding the tie rod, users only need to weld according to the specified weld length to achieve a high-strength connection.

[0015] When the diagonal tie rod is fixed to the edge of the plate by a threaded connection, both ends of the diagonal tie rod are provided with external threads, and the edge of the plate is provided with an internal thread hole that matches the external threads. The diagonal tie rod is fixed to the plate by screwing the threads together.

[0016] The beneficial effects of the above-mentioned improved solution are as follows: By setting external threads at both ends of the inclined tie rod and matching internal threaded holes on the edge of the plate, this utility model uses a threaded connection to fix the tie rod. This connection method is not only convenient to install, but also allows for quick adjustment of the tie rod's length and tension to adapt to different installation requirements. The threaded connection also has good self-locking performance, effectively preventing the tie rod from loosening due to vibration during operation. In use, the user only needs to screw the tie rod into the threaded hole of the plate and adjust the length and tension of the tie rod as needed to achieve a stable connection.

[0017] Furthermore, the inclined tie rod is made of high-strength metal material, and its surface is treated with anti-corrosion measures.

[0018] The diagonal tie rod is made of high-strength metal materials, such as high-strength stainless steel (e.g., 316L stainless steel) or alloy steel.

[0019] The surface of the diagonal tie rod undergoes anti-corrosion treatment. Specific treatment methods include: Electroplating: A layer of zinc, nickel or other anti-corrosion metal is plated onto the surface of the tie rod using an electroplating process. The thickness is usually between 10-50 micrometers to enhance its corrosion resistance.

[0020] Coating: Apply an anti-corrosion coating, such as an epoxy resin coating or a polytetrafluoroethylene (PTFE) coating, to the surface of the tie rod. The coating thickness is generally 50-100 micrometers, which can effectively prevent the tie rod from corroding in harsh environments.

[0021] Furthermore, a gasket is provided at the connection between the diagonal tie rod and the plate. The gasket is made of an elastic material and is used to buffer the stress between the diagonal tie rod and the plate.

[0022] The gasket is made of an elastic material, and the following types can be selected: Rubber: such as natural rubber, nitrile rubber or ethylene propylene diene monomer (EPDM) rubber. These materials have good elasticity and corrosion resistance and can act as a buffer between the tie rod and the plate.

[0023] Polyurethane: Polyurethane materials have high strength and good elasticity, as well as excellent oil and water resistance, making them suitable for a variety of working conditions.

[0024] Silicone rubber: Silicone rubber has excellent high temperature resistance and elasticity, and can maintain good sealing and cushioning effects in high temperature environments.

[0025] Furthermore, a sealing gasket is provided at the connection point of the adjacent plates. The sealing gasket is located inside the inclined tie rod to prevent leakage of the heat exchange medium.

[0026] Furthermore, each end of the diagonal tie rod is provided with an adjusting nut, which can be used to adjust the length and tension of the diagonal tie rod to ensure a tight connection between adjacent plates.

[0027] Adjusting nuts are provided at both ends of the diagonal tie rod, and the adjusting nuts are connected to the tie rod via threads. The specific setting is as follows: Threaded connection: Both ends of the pull rod are machined with external threads, and the internal thread of the adjusting nut matches the external thread of the pull rod. By rotating the adjusting nut, the length and tension of the pull rod can be adjusted.

[0028] Locking device: A locking device, such as a lock nut or a spring washer, can be installed on one side of the adjusting nut to prevent the adjusting nut from loosening during operation.

[0029] Adjustment method: Length adjustment: By rotating the adjusting nut, the two ends of the pull rod can be lengthened or shortened under the action of the thread, thereby adjusting the total length of the pull rod.

[0030] Tension adjustment: By rotating the adjusting nut, the tension of the tie rod can be increased or decreased to ensure a tight connection between adjacent plates and prevent the plates from loosening due to vibration or pressure changes.

[0031] Compared with the prior art, the beneficial effects of the plate connection reinforcement structure for a fully welded plate heat exchanger provided by this utility model are: This invention relates to a reinforced plate connection structure for a fully welded plate heat exchanger. By introducing a diagonal tie rod reinforcement method, it effectively solves many problems associated with traditional welded connection structures. Firstly, the diagonal tie rod design significantly enhances the bending stiffness and shear strength of the plate connection area. Compared to traditional welded connections, the diagonal tie rod, by adjusting its length and angle, can better disperse stress, avoiding stress concentration and thus improving the stability and reliability of the connection. Secondly, the diagonal tie rod is made of high-strength metal and undergoes anti-corrosion treatment, which not only ensures its durability in harsh environments but also extends its service life. Furthermore, the surface anti-corrosion treatment of the tie rod further enhances its corrosion resistance, enabling it to maintain good performance under various operating conditions. In terms of installation and maintenance, the reinforcement structure of this utility model has significant advantages. The diagonal tie rods are fixed to the edge of the plates by welding or threaded connections. This connection method is not only convenient to install but also allows for quick adjustment according to actual needs. For example, the length and tension of the tie rods can be easily adjusted by adjusting the nuts, ensuring a tight connection between adjacent plates. This adjustable design allows the heat exchanger to maintain optimal operating conditions under different operating conditions. Simultaneously, the diagonal arrangement of the tie rods effectively reduces stress concentration caused by thermal expansion or pressure changes, further improving the stability and service life of the heat exchanger. Furthermore, the elastic gasket design between the tie rods and the plates effectively buffers vibrations and thermal expansion differences during operation, reducing plate deformation and damage caused by stress concentration. From a maintenance and replacement perspective, the reinforcement structure of this invention offers exceptional flexibility. Unlike traditional welded connections, the threaded connection of the diagonal tie rods allows users to easily disassemble and replace the plates when needed. This design not only reduces maintenance costs but also extends the service life of the heat exchanger. In practical applications, users can select appropriate tie rod cross-sectional shapes and materials based on the specific operating conditions and requirements of the heat exchanger to further optimize its performance. Attached Figure Description

[0032] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 An example diagram of a plate connection reinforcement structure for a fully welded plate heat exchanger; Figure 2 A top view of a plate connection reinforcement structure for an all-welded plate heat exchanger; The attached diagram lists the components represented by each number as follows: 10. Plate; 11. Sealing gasket; 20. Diagonal tie rod; 21. Washer; 22. Adjusting nut. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0035] like Figures 1-2 The diagram shown is an example of a plate connection reinforcement structure for a fully welded plate heat exchanger provided by this utility model. It includes adjacent plates 10, wherein: an oblique tie rod 20 is provided at the connection part of the adjacent plates 10. The oblique tie rod 20 is fixed to the edge of the plate 10 by welding or threaded connection. The oblique tie rod 20 is arranged obliquely. By adjusting the length and angle of the oblique tie rod 20, the adjacent plates 10 are tightly connected together.

[0036] Installation of the diagonal tie rod: The tie rod is fixed to the edge of the plate by welding or threaded connection. Welding provides higher connection strength, while threaded connection facilitates installation and disassembly. Users can choose the appropriate connection method according to their actual needs.

[0037] Stress Dispersion and Buffering: By adjusting the length and angle of the tie rods, adjacent plates are tightly connected. The diagonal arrangement of the tie rods effectively disperses stress and reduces stress concentration caused by thermal expansion or pressure changes. Simultaneously, the elastic gaskets between the tie rods and the plates further buffer vibrations and thermal expansion differences during operation, reducing plate deformation and damage caused by stress concentration.

[0038] Adjustment and Optimization: By installing adjusting nuts at both ends of the tie rod, users can adjust the length and tension of the tie rod according to actual operating conditions, ensuring a tight connection between adjacent plates. This adjustable design allows the heat exchanger to maintain optimal operating conditions under different circumstances.

[0039] In the above technical solution, one end of the diagonal tie rod 20 is fixed to the edge of a plate 10, and the other end is fixed to the edge of another plate 10. The connection between the diagonal tie rod 20 and the plate 10 forms a non-perpendicular angle.

[0040] Furthermore, in the above technical solution, the cross-sectional shape of the diagonal tie rod 20 is circular, rectangular or elliptical, and the length and angle of the diagonal tie rod 20 can be adjusted according to the size and shape of the plate 10.

[0041] Furthermore, in the above technical solution, there are multiple diagonal tie rods 20, which are evenly distributed along the edge of the plate 10, and the interval between adjacent diagonal tie rods 20 is equal.

[0042] In the above technical solution, when the diagonal tie rod 20 is fixed to the edge of the plate 10 by welding, a reinforcing weld is provided at the welding part, and the length of the reinforcing weld is more than twice the diameter of the diagonal tie rod 20.

[0043] In the above technical solution, when the diagonal tie rod 20 is fixed to the edge of the plate 10 by a threaded connection, the two ends of the diagonal tie rod 20 are respectively provided with external threads, and the edge of the plate 10 is provided with an internal thread hole that matches the external threads. The diagonal tie rod 20 is fixed to the plate 10 by thread engagement.

[0044] Screw one end of the pull rod into the threaded hole on the edge of a plate, ensuring a secure connection between the pull rod and the plate. Screw the other end of the pull rod into the threaded hole on the edge of another plate. At this point, the pull rod is in its initial installation state and no tension has been applied.

[0045] Adjusting the length and tension: Use a wrench or other tool to rotate the adjusting nut. Because the adjusting nut engages with the threaded part of the pull rod, rotating it causes the pull rod to move axially within the threaded hole. The length of the pull rod can be adjusted by rotating the adjusting nut. Specifically, rotating the adjusting nut clockwise shortens the pull rod, and rotating it counterclockwise extends it.

[0046] After adjusting the tie rod length to the appropriate position, continue rotating the adjusting nut to increase the tension of the tie rod. This increased tension creates a tighter contact force between adjacent plates, ensuring a secure seal and strong connection between them.

[0047] Locking operation: A locking device (such as a lock nut or spring washer) can be installed on one side of the adjusting nut to prevent it from loosening due to vibration during operation.

[0048] The locking device is fixed to the adjusting nut by thread engagement or mechanical pressure, ensuring that the position of the adjusting nut is fixed, thereby keeping the length and tension of the tie rod constant.

[0049] Detailed operation steps: Screw one end of the pull rod into the threaded hole of a plate, ensuring it is fully engaged. Screw the other end of the pull rod into the threaded hole of another plate; the pull rod is now in a relaxed state.

[0050] Using a wrench, rotate the adjusting nut clockwise to shorten the pull rod and counterclockwise to extend it, until the pull rod reaches the designed length. Continue rotating the adjusting nut to increase the tension of the pull rod. Observe the contact between adjacent plates to ensure they fit tightly without any obvious gaps.

[0051] Install a locking device (such as a lock nut or spring washer) on one side of the adjusting nut, and fix it to the adjusting nut by thread engagement or mechanical pressure to prevent the adjusting nut from loosening.

[0052] Furthermore, in the above technical solution, the inclined tie rod 20 is made of high-strength metal material, and the surface of the inclined tie rod 20 is treated with anti-corrosion.

[0053] Furthermore, in the above technical solution, a gasket 21 is provided at the connection between the diagonal tie rod 20 and the plate 10. The gasket 21 is made of elastic material and is used to buffer the stress between the diagonal tie rod 20 and the plate 10.

[0054] Furthermore, in the above technical solution, a sealing gasket 11 is provided at the connection part of adjacent plates 10. The sealing gasket 11 is located inside the inclined tie rod 20 to prevent leakage of heat exchange medium.

[0055] Furthermore, in the above technical solution, adjusting nuts 22 are provided at both ends of the inclined tie rod 20. The length and tension of the inclined tie rod 20 are adjusted by adjusting the nuts 22 to ensure a tight connection between adjacent plates 10.

[0056] First embodiment: In this embodiment, the diagonal tie rod is made of high-strength 316L stainless steel, a material with excellent corrosion resistance and high strength, making it particularly suitable for use in seawater environments. The tie rod surface is electroplated with a 30-micron-thick zinc layer to further enhance its corrosion resistance. The tie rod is fixed to the edge of the plate via a threaded connection, with external threads machined at both ends and internal threaded holes on the plate edge, achieving connection through thread engagement. The tie rod is arranged at an angle, forming a 45-degree angle with the connection point to the plate. The length and tension of the tie rod are adjusted using an adjusting nut to ensure a tight connection between adjacent plates. Rubber gaskets are placed at the connection point between the tie rod and the plate to buffer stress and reduce vibration.

[0057] During installation, first screw one end of the tie rod into the threaded hole of one plate, and then screw the other end into the threaded hole of another plate. Adjust the length and tension of the tie rod by adjusting the nut to ensure that the adjacent plates fit tightly together. Place rubber gaskets at the connection points between the tie rod and the plates to buffer stress and reduce vibration.

[0058] This embodiment applies to the preheating and cooling stages of a seawater desalination system. During seawater desalination, the seawater needs to be preheated to improve evaporation efficiency, while the desalinated water needs to be cooled to lower its temperature. Under these conditions, the heat exchanger must withstand the strong corrosiveness of seawater and frequent temperature and pressure changes.

[0059] Second embodiment: In this embodiment, the diagonal tie rod is made of high-strength 304 stainless steel, a material with excellent corrosion resistance and hygiene properties, meeting pharmaceutical industry standards. The tie rod surface is treated with a polytetrafluoroethylene (PTFE) coating with a thickness of 80 micrometers to further enhance its corrosion resistance and stain resistance. The tie rod is fixed to the edge of the plate by welding, with reinforced welds at the weld points. The weld length is greater than twice the diameter of the tie rod to ensure connection strength. The tie rod is arranged diagonally, forming a 60-degree angle with the connection point to the plate. The length and tension of the tie rod are adjusted by adjusting nuts to ensure a tight connection between adjacent plates. Silicone rubber gaskets are placed at the connection point between the tie rod and the plate to buffer stress and reduce vibration.

[0060] During installation, first weld one end of the tie rod to the edge of a plate, ensuring a secure weld. Then weld the other end to the edge of another plate, again ensuring a secure weld. Adjust the length and tension of the tie rod using the adjusting nut, ensuring a tight fit between adjacent plates. Place silicone rubber gaskets at the connection points between the tie rod and the plates to cushion stress and reduce vibration.

[0061] This embodiment is applicable to heat exchangers used in the pharmaceutical industry for processing liquid drugs. For example, in the antibiotic production process, the liquid drug needs to be heated and cooled while ensuring the cleanliness and hygiene standards of the heat exchanger. Under such conditions, traditional welded connections are prone to damage during frequent cleaning, while the inclined tie rod reinforcement structure of this embodiment effectively solves these problems.

[0062] Specifically, the principle of this utility model is as follows: This utility model's plate connection reinforcement structure for a fully welded plate heat exchanger is based on mechanical and materials science principles. By optimizing the connection method between the plates, it improves the overall performance and service life of the heat exchanger. Its core principle lies in utilizing the mechanical properties of the diagonal tie rods to disperse and buffer the stress generated during operation, thereby enhancing the stability and reliability of the connection points. In terms of mechanical principles, the design of the diagonal tie rods effectively disperses stress. Compared to traditional vertical tie rods or welded connections, diagonal tie rods, by adjusting their length and angle, can evenly distribute stress throughout the entire connection area of ​​the plates, avoiding stress concentration. This stress dispersion effect is particularly important during heat exchanger operation, especially under frequent temperature changes and pressure fluctuations, significantly reducing the fatigue risk at the connection points. Furthermore, the diagonal arrangement of the tie rods effectively reduces stress caused by differences in thermal expansion, further improving the stability and service life of the heat exchanger. In terms of materials science principles, the selection of materials and surface treatment for diagonal tie rods are crucial. High-strength metallic materials (such as stainless steel or alloy steel) possess high tensile and yield strength, enabling them to withstand significant tensile and stress forces, while also exhibiting excellent corrosion resistance. Anti-corrosion treatments (such as electroplating or coating) on ​​the tie rod surface can further enhance its corrosion resistance, allowing it to maintain good performance in harsh environments. This combination of material selection and surface treatment not only improves the service life of the tie rod but also enhances the reliability of the entire reinforcement structure.

Claims

1. A plate connection reinforcement structure for a fully welded plate heat exchanger, comprising adjacent plates, characterized in that: An oblique tie rod is provided at the connection point of adjacent plates. The oblique tie rod is fixed to the edge of the plate by welding or threaded connection. The oblique tie rod is arranged at an angle. By adjusting the length and angle of the oblique tie rod, the adjacent plates are tightly connected together.

2. The plate connection reinforcement structure for a fully welded plate heat exchanger according to claim 1, characterized in that, One end of the diagonal tie rod is fixed to the edge of a plate, and the other end is fixed to the edge of another plate. The connection between the diagonal tie rod and the plate forms a non-perpendicular angle.

3. The plate connection reinforcement structure for a fully welded plate heat exchanger according to claim 2, characterized in that, The cross-sectional shape of the diagonal tie rod is circular, rectangular, or elliptical, and the length and angle of the diagonal tie rod can be adjusted according to the size and shape of the plate.

4. The plate connection reinforcement structure for a fully welded plate heat exchanger according to claim 3, characterized in that, The number of diagonal tie rods is multiple, and the multiple diagonal tie rods are evenly distributed along the edge of the plate, with equal spacing between adjacent diagonal tie rods.

5. The plate connection reinforcement structure for a fully welded plate heat exchanger according to claim 1, characterized in that, When the diagonal tie rod is fixed to the edge of the plate by welding, a reinforcing weld is provided at the welding point, and the length of the reinforcing weld is greater than twice the diameter of the diagonal tie rod.

6. The plate connection reinforcement structure for a fully welded plate heat exchanger according to claim 1, characterized in that, When the diagonal tie rod is fixed to the edge of the plate by a threaded connection, both ends of the diagonal tie rod are provided with external threads, and the edge of the plate is provided with an internal thread hole that matches the external threads. The diagonal tie rod is fixed to the plate by screwing the threads together.

7. The plate connection reinforcement structure for a fully welded plate heat exchanger according to claim 4, characterized in that, The diagonal tie rod is made of high-strength metal material, and its surface is treated with anti-corrosion coating.

8. The plate connection reinforcement structure for a fully welded plate heat exchanger according to claim 7, characterized in that, A gasket is provided at the connection between the diagonal tie rod and the plate. The gasket is made of elastic material and is used to buffer the stress between the diagonal tie rod and the plate.

9. The plate connection reinforcement structure for a fully welded plate heat exchanger according to claim 8, characterized in that, The connection between adjacent plates is provided with a sealing gasket, which is located on the inside of the inclined tie rod to prevent leakage of the heat exchange medium.

10. The plate connection reinforcement structure for a fully welded plate heat exchanger according to claim 9, characterized in that, The diagonal tie rod is equipped with adjusting nuts at both ends. The length and tension of the diagonal tie rod can be adjusted by adjusting the nuts to ensure a tight connection between adjacent plates.

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