Plate heat exchanger suitable for high-temperature and high-pressure environment

Abstract

A plate heat exchanger suitable for a high-temperature and high-pressure environment comprises an upper beam, a lower beam, a fixed clamping plate and a stand column, the fixed clamping plate and the stand column are fixedly connected with the two ends of the upper beam and the two ends of the lower beam, a movable plate is installed between the stand column and the fixed clamping plate, and heat exchange plates are arranged between the movable plate and the fixed clamping plate. A refrigerant inlet flange, a refrigerant outlet flange, a heating medium inlet flange and a heating medium outlet flange are arranged on the fixed clamping plate; the clamping device is characterized in that the section of the upper beam is of an I-shaped steel structure, a shaft head component is welded to the end, connected with the fixed clamping plate, of the upper beam, a mounting hole corresponding to the shaft head component is formed in the fixed clamping plate, the shaft head component penetrates through the mounting hole and extends out of the fixed clamping plate, and a locking nut is installed at the outer end of the shaft head component in a screwed mode. Performance stability, connection precision and production efficiency of the plate heat exchanger in a high-pressure environment are remarkably improved, and the plate heat exchanger has wide application prospects and market value.

Description

Technical Field

[0001] This utility model belongs to the technical field of plate heat exchangers, and in particular relates to a plate heat exchanger suitable for high temperature and high pressure environments. Background Technology

[0002] Plate heat exchangers are widely used in industrial production and energy conversion due to their high heat exchange efficiency, compact structural design, and flexible applicability. Especially under high temperature and high pressure environments, the stability and reliability of plate heat exchangers become key indicators for evaluating their performance. However, the structural design deficiencies of existing plate heat exchangers are becoming increasingly apparent when dealing with extreme operating conditions, affecting the long-term stable operation of the equipment. Specifically, the connection method between the upper beam and the fixed clamping plate in traditional plate heat exchangers has significant defects. Referring to Figure 7, in this design, a square groove is cut into the fixed clamping plate, and a matching square connecting plate is welded to the end of the upper beam. The square connecting plate is placed within the square groove and fixed by fastening bolts. While this connection method achieves a certain degree of connection between the upper beam and the fixed clamping plate, it exposes the following problems under high temperature and high pressure (2-2.5 MPa, temperature 180℃): Limited structural strength: The mating area between the square groove and the square connecting plate is limited, and the connection is mainly maintained by bolt tightening force. Under high temperature and high pressure, this can easily lead to loosening or deformation of the connection, thus affecting the structural strength and sealing performance of the entire heat exchanger. High processing complexity: The manufacturing of the square connecting plate requires precise machining to ensure a tight fit with the square groove. This not only increases manufacturing costs but also extends the production cycle. Insufficient rigidity: Under high temperature and high pressure, due to the limitations of the structural design, traditional connection methods cannot provide sufficient rigidity to resist deformation caused by thermal expansion and contraction or fluid pressure, thus affecting the heat exchanger's heat exchange efficiency and service life. In special operating conditions using special flanges, the square connecting plate is prone to interference and collision with the outer edge of the flange. In summary, the existing connection method between the upper beam and the fixed clamping plate in plate heat exchangers suffers from insufficient structural strength, high processing complexity, and insufficient rigidity under high temperature and high pressure environments. Therefore, improvements are urgently needed to enhance the overall performance and reliability of the heat exchanger. Thus, developing a plate heat exchanger suitable for high temperature and high pressure environments and optimizing the connection method between its upper beam and the fixed clamping plate has become a pressing technical problem to be solved in this field. Utility Model Content

[0003] In view of the problems existing in the prior art, this utility model provides a plate heat exchanger suitable for high temperature and high pressure environments.

[0004] This utility model is implemented as follows: a plate heat exchanger suitable for high temperature and high pressure environments includes an upper beam and a lower beam, a fixed clamping plate and a column fixedly connected to both ends of the upper and lower beams, a movable plate installed between the column and the fixed clamping plate, heat exchange plates provided between the movable plate and the fixed clamping plate, and a refrigerant inlet flange, a refrigerant outlet flange, a heat medium inlet flange and a heat medium outlet flange provided on the fixed clamping plate; the upper beam has an I-beam cross-section, a shaft head component welded to the connection end between the upper beam and the fixed clamping plate, a mounting hole corresponding to the shaft head component on the fixed clamping plate, the shaft head component passing through the mounting hole and extending out of the fixed clamping plate, and a locking nut screwed onto the outer end of the shaft head component.

[0005] Preferably, the shaft head component includes a feeding connection part, a guide part, and a threaded connection part.

[0006] Preferably, the upper beam connecting part is provided with a slot, which is inserted into the vertical plate of the I-beam upper beam and then welded together.

[0007] Preferably, the mounting hole is a stepped hole, the hole near the end face of the upper beam is a guide hole, and the inner diameter of the hole away from the end face of the upper beam is smaller than the inner diameter of the guide hole.

[0008] Preferably, the connection between the guide portion and the threaded connection portion is provided with a centering cone portion that is inclined in the direction of the box threaded connection portion, and the bottom of the guide hole is provided with a tapered guide surface that cooperates with the centering cone portion.

[0009] Preferably, the centering cone and the conical guide surface are fitted with a cone angle of 120 degrees.

[0010] The advantages and technical effects of this utility model are mainly reflected in the following aspects: Enhanced adaptability to high-pressure environments: By adopting an I-beam structure upper beam and an optimized shaft head component design, this utility model significantly improves the load-bearing capacity and bending stiffness of the plate heat exchanger under high-pressure environments, effectively resisting bending and torsional forces, and ensuring the stability and durability of the heat exchanger. Improved connection accuracy and stability: The multi-functional integrated design of the shaft head component, including the feeding connection part, guide part, and threaded connection part, as well as the matching slots, stepped holes, and centering cones, achieves precise and efficient connections. These designs not only simplify the installation process and improve assembly efficiency, but also ensure high precision and stability of the connection, avoiding interference from loose connections or leaks and collisions with the fixed plate flanges. Optimized flange connections: The refrigerant and heat medium inlet and outlet flanges on the clamping plate allow the heat exchanger to be easily connected to other pipes or equipment, improving the versatility and flexibility of the heat exchanger. At the same time, the flange connection has good sealing performance and reliability, ensuring stable fluid flow and efficient heat exchange within the heat exchanger. Easy Maintenance and Replacement: The use of locking nuts not only enhances the tightening force of the connection but also facilitates subsequent maintenance and replacement. This design reduces maintenance costs and improves the maintainability and service life of the heat exchanger. Increased Production Efficiency: The various optimized designs of this utility model not only improve the performance and stability of the heat exchanger but also simplify the production process and reduce production costs. Simultaneously, these designs also improve the assembly efficiency and production efficiency of the heat exchanger, providing strong support for industrial production. In summary, this utility model, through a series of innovative designs, significantly improves the performance stability, connection accuracy, and production efficiency of plate heat exchangers under high-pressure environments, possessing broad application prospects and market value. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model;

[0012] Figure 2 yes Figure 1 The left view;

[0013] Figure 3 This is a schematic diagram of the upper volume structure;

[0014] Figure 4 This is a schematic diagram of the shaft head component structure;

[0015] Figure 5 yes Figure 4 Top view;

[0016] Figure 6 yes Figure 2 Sectional view of AA;

[0017] Figure 7 This is a schematic diagram of the existing technology structure.

[0018] 1. Upper beam; 2. Lower beam; 3. Fixed clamping plate; 3-1. Mounting hole; 3-2. Conical guide surface; 4. Movable plate; 5. Heat exchange plate; 6. Refrigerant inlet flange; 7. Refrigerant outlet flange; 8. Heat medium inlet flange; 9. Heat medium outlet flange; 10. Shaft head component; 10-1. Feeding connection part; 10-2. Guide part; 10-3. Threaded connection part; 10-4. Slot; 10-5. Centering cone part; 10-6. Locking nut; 11. Column. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this utility model.

[0020] Please see Figures 1 to 6A plate heat exchanger suitable for high-temperature and high-pressure environments includes an upper beam 1 and a lower beam 2, fixed clamping plates 3 and columns 11 fixedly connecting the two ends of the upper and lower beams, a movable plate 4 installed between the columns and the fixed clamping plates, and heat exchange plates 5 arranged between the movable plate and the fixed clamping plates. The fixed clamping plates are equipped with a refrigerant inlet flange 6 and a refrigerant outlet flange 7, as well as a heat medium inlet flange 8 and a heat medium outlet flange 9. The flange design allows the heat exchanger to be easily connected to other pipelines or equipment, enabling the inlet and outlet of refrigerant and heat medium. This design improves the versatility and flexibility of the heat exchanger, allowing it to adapt to different operating conditions and fluid media. Simultaneously, the flange connection also provides good sealing and reliability, ensuring stable fluid flow and heat exchange efficiency within the heat exchanger. The upper beam has an I-beam structure, which possesses excellent load-bearing capacity and bending stiffness, effectively resisting bending and torsional forces generated under high-pressure environments. This structure not only improves the mechanical strength of the upper beam but also enhances the stability and durability of the entire plate heat exchanger. Furthermore, the I-beam structure design helps reduce weight and facilitates installation and maintenance. A shaft head component 10 is welded to the connection end between the upper beam and the fixed clamping plate. The welding design of the shaft head component makes the connection between the upper beam and the fixed clamping plate more robust and reliable. As a connecting component, the shape and size of the shaft head component can be precisely controlled, ensuring high precision and stability of the connection. Simultaneously, the welding method improves the strength and sealing of the connection, avoiding failures caused by loosening or leakage under high pressure. Corresponding to the mounting holes 3-1 on the fixed clamping plate of the shaft head component, the design of the mounting holes allows the shaft head component to easily pass through the fixed clamping plate, achieving rapid positioning and installation between the upper beam and the fixed clamping plate. This design simplifies the installation process, improves assembly efficiency, and ensures precise alignment between the shaft head component and the fixed clamping plate. The shaft head component passes through the mounting holes and extends out of the fixed clamping plate. The portion of the shaft head component extending out of the fixed clamping plate provides space for subsequent locking, allowing the locking nut to be easily screwed onto the shaft head component, further reinforcing the connection between the upper beam and the fixed clamping plate. This design enhances the fastening force of the connection, improving the stability and safety of the heat exchanger under high-pressure environments. A lock nut is screwed onto the outer end of the shaft head component; this screw-on design is crucial for ensuring a secure connection between the upper beam and the fixed clamping plate. Tightening the lock nut generates sufficient preload, ensuring a tight fit between the shaft head component and the fixed clamping plate, preventing leaks or malfunctions caused by loose connections under high-pressure conditions. Furthermore, the use of the lock nut facilitates subsequent maintenance and replacement.

[0021] Preferably, the shaft head component includes a feeding connection part 10-1, a guide part 10-2, and a threaded connection part 10-3. This achieves multi-functional integration and efficient connection. The feeding connection part facilitates welding to the upper beam, ensuring connection strength; the guide part guides the shaft head component smoothly through the mounting holes of the fixing clamping plate, improving assembly accuracy; the threaded connection part cooperates with the locking nut 10-6 to achieve a firm lock. This design simplifies the structure, improves connection efficiency and stability, and is suitable for plate heat exchangers under high-pressure environments.

[0022] Preferably, the upper beam connecting part is provided with a slot 10-4, which is inserted into the vertical plate of the I-beam upper beam and then welded together. This achieves precise positioning and pre-fixation, providing stable support for subsequent welding. This design improves the accuracy and efficiency of welding and ensures a firm connection between the upper beam and the shaft end component. At the same time, the slot structure also enhances the rigidity of the connection part, making the entire plate heat exchanger more stable and reliable under high pressure.

[0023] Preferably, the mounting hole 3-1 is a stepped hole, with the hole near the upper beam end face serving as a guide hole to facilitate the smooth insertion and positioning of the shaft head component; while the smaller diameter hole further away from the upper beam end face provides additional support and fixation, enhancing the connection stability between the shaft head component and the fixed clamping plate. This design improves assembly accuracy and efficiency, ensuring reliable operation of the heat exchanger under high-pressure environments.

[0024] Preferably, the connection between the guide portion and the threaded connection portion is provided with a centering cone portion 10-5 inclined in the direction of the threaded connection portion, and the bottom of the guide hole is provided with a conical guide surface 3-2 that mates with the centering cone portion. Preferably, the centering cone portion and the conical guide surface have a 120-degree conical angle. This achieves automatic centering and guidance of the shaft end component when it is inserted into the mounting hole. The 120-degree conical angle between the centering cone portion and the conical guide surface not only ensures that the shaft end component can accurately and smoothly enter the mounting hole, but also improves the coaxiality and accuracy of the connection. This design effectively avoids connection loosening or leakage problems caused by installation deviations, enhances the stability and sealing of the heat exchanger under high pressure environments, simplifies the assembly process, and improves production efficiency.

[0025] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A plate heat exchanger suitable for high temperature and high pressure environments, comprising an upper beam and a lower beam, a fixed clamping plate and a column fixedly connected to both ends of the upper beam and the lower beam, a movable plate installed between the column and the fixed clamping plate, heat exchange plates provided between the movable plate and the fixed clamping plate, and a refrigerant inlet flange and a refrigerant outlet flange, as well as a heat medium inlet flange and a heat medium outlet flange provided on the fixed clamping plate; characterized in that: The upper beam has an I-beam structure in cross section. A shaft head component is welded to the connection end of the upper beam and the fixed clamping plate. The shaft head component passes through the mounting hole on the fixed clamping plate and extends out of the fixed clamping plate. A lock nut is screwed onto the outer end of the shaft head component.

2. The plate heat exchanger suitable for high temperature and high pressure environments according to claim 1, characterized in that: The shaft head component includes an upper beam connecting part, a guide part, and a threaded connecting part.

3. The plate heat exchanger suitable for high temperature and high pressure environments according to claim 2, characterized in that: The upper beam connection part is provided with a slot, which is inserted into the vertical plate of the I-beam upper beam and then welded together.

4. The plate heat exchanger suitable for high temperature and high pressure environments according to claim 3, characterized in that: The mounting holes are stepped holes, the holes near the upper beam end face are guide holes, and the inner diameter of the holes away from the upper beam end face is smaller than the inner diameter of the guide holes.

5. The plate heat exchanger suitable for high temperature and high pressure environments according to claim 4, characterized in that: The connection between the guide portion and the threaded connection portion is provided with a centering cone portion that is inclined toward the threaded connection portion, and the bottom of the guide hole is provided with a tapered guide surface that cooperates with the centering cone portion.

6. The plate heat exchanger suitable for high temperature and high pressure environments according to claim 5, characterized in that: The centering cone and the conical guide surface are fitted with a cone angle of 120 degrees.

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