Variable-pitch plate-fin energy-saving heat exchanger

Abstract

The application belongs to the technical field of plate-fin heat exchanger, and discloses a variable-spacing plate-fin energy-saving heat exchanger, which comprises a plurality of heat exchange boxes arranged between two pressing plates, a pipeline one and a pipeline two for supplying cooled medium and cooling medium respectively, the heat exchange box comprises a plurality of plate fins arranged at equal intervals in the interior, and further comprises an outer shell spliced by a cover plate, a channel steel edge and a bottom plate, both ends of the plate fin are provided with end sealing plates, and the end sealing plates of two adjacent plate fins are staggered and connected to form a closed rectangular water channel. The plate fin can slide horizontally in the heat exchange box, both ends of the graphite sealing strip are provided with end sealing plates which are staggered and connected to form a closed water channel when sliding horizontally. When the cooling power of the heat exchanger in the cooling system is improved, the injection pressure of the pipeline one is increased, and the rectangular water channel is expanded to the two sides due to the medium pressure to widen the water channel.

Description

A variable-pitch plate-fin energy-saving heat exchanger Technical Field

[0001] This invention belongs to the technical field of plate-fin heat exchangers, specifically a variable-pitch plate-fin energy-saving heat exchanger. Background Technology

[0002] A heat exchanger is a device that facilitates the exchange of heat energy between media, and it is widely used in industrial thermal management systems. Heat exchangers assist industrial systems in achieving temperature control, energy recovery, and efficient thermal management, and are applied in various industrial environments and scenarios.

[0003] Current plate-fin heat exchangers have some shortcomings in terms of variable fin spacing. For example, the fins are stacked between the baffles, making it difficult to adjust the fin spacing. Alternatively, the adjustment methods used are often simplistic and inefficient, such as using multi-section lead screws to control the movement of the fins. This method requires high precision from the lead screws, and ensuring that each fin has the same spacing after adjustment is a significant technical challenge.

[0004] This application proposes a variable-pitch plate-fin energy-saving heat exchanger to overcome the above-mentioned defects, and discloses a new plate-fin variable-pitch scheme. Summary of the Invention

[0005] To address the problems mentioned in the background section, this invention provides a variable-pitch plate-fin energy-saving heat exchanger.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a variable-pitch plate-fin energy-saving heat exchanger, comprising a plurality of heat exchange boxes disposed between two pressure plates, and further comprising a first pipeline and a second pipeline for supplying the cooled medium and the cooling medium, respectively. The heat exchange box comprises a plurality of plates equidistantly arranged inside, and further comprises an outer shell spliced ​​together by a cover plate, channel steel edge and bottom plate. Both ends of the plates are provided with end sealing plates, and the end sealing plates of two adjacent plates are staggered to form a closed rectangular water channel.

[0007] Both the top and bottom parts of the plate fins and the end sealing plate are provided with graphite sealing strips that fit and seal with the cover plate and the bottom plate. The plate fins can slide laterally in the heat exchange box.

[0008] The interior of the plate fins is used for the flow of the cooled medium, and the rectangular water channel is used for the passage of the cooling medium.

[0009] Preferably, the plate fin includes wave cavities equidistantly arranged thereon, and the rectangular water channel formed between two adjacent plate fins is laterally invaded by the wave cavities.

[0010] Preferably, the heat exchanger further includes multiple telescopic tubes disposed at both ends of the heat exchange box, the plate fins are fixedly connected to the multiple telescopic tubes, the multiple telescopic tubes can expand and contract synchronously with the plate fins when they slide laterally, and the multiple telescopic tubes are connected to pipeline one;

[0011] The heat exchange box has end sleeves fixedly installed at both ends to cover the inner side of multiple telescopic pipe sections.

[0012] Preferably, the multi-section telescopic tube includes several plunger cylinders connected end to end. Each plunger cylinder includes an outer sleeve and a hollow piston rod that are fixedly connected to each other. The hollow piston rod is sleeved and interference-fitted into the outer sleeve of the previous plunger cylinder.

[0013] The outer sleeve has a rod cavity that provides space for the extension and retraction of the hollow piston rod;

[0014] The rodless cavity of the outer sleeve is fixedly connected to the plate fin.

[0015] Preferably, the pipeline includes a sleeve, and a hollow piston rod at the end of the multi-section telescopic pipe extends into the sleeve and is movably fitted therewith to form an interference fit.

[0016] Preferably, the fins located in the middle are in a fixed state;

[0017] The closer to both ends of the multi-section telescopic tube, the larger the telescopic space reserved for the hollow piston rod in the rod chamber of the outer sleeve of the corresponding plunger cylinder. The telescopic space reserved for the hollow piston rod by the sleeve and the outer sleeve located at the end is the largest.

[0018] Preferably, the multi-section telescopic tube is provided with a synchronous scissor mechanism, and each section of the outer sleeve is connected to a cross axis of the synchronous scissor mechanism.

[0019] Preferably, the end sleeve is fixed with bolts and studs, and the fixing rods are set at both ends of the synchronous scissor mechanism to control the maximum extension length of the synchronous scissor mechanism. The fixed position of the fixing rods is adjustable along the extension direction of the synchronous scissor mechanism.

[0020] Preferably, both ends of the cover plate are provided with water distributors for introducing cooling medium into the rectangular water channels inside the heat exchange box, and the bottom of the water distributor is provided with water inlets for connecting each rectangular water channel to introduce cooling medium into them.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] This invention utilizes finned plates that allow for lateral sliding within the heat exchanger. Both ends of the graphite sealing strip are equipped with staggered end-sealing plates to maintain a closed water channel during lateral sliding. When the cooling power of the heat exchanger is increased in the cooling system, and the injection pressure of pipe one is increased, the rectangular water channel is widened by the increased medium pressure. This widening of the rectangular water channel can be limited by a fixing rod, allowing adjustment according to different practical needs. Furthermore, the fixing rod can be replaced with a drive mechanism to compress the synchronous scissor mechanism inward, thereby shrinking the rectangular water channel. This design offers flexibility and wide applicability. It enhances heat exchange in the system and prevents safety hazards such as leakage and bursting due to overpressure in the water channel.

[0023] This invention utilizes a multi-section telescopic tube with multiple telescopic plunger cylinders, each connected to a corresponding fin. The fin is fixedly connected to an outer sleeve, and the hollow piston rod on each plunger cylinder is movably fitted onto the outer sleeve of the preceding plunger cylinder. When the pressure of the passive cooling medium increases, each plunger cylinder extends, causing or following the lateral displacement of the fin, thus expanding the cooling water passage. A synchronous scissor mechanism is provided to ensure that the spacing between the plunger cylinders and the fins is equal after displacement. Therefore, compared to conventional screw drives, this invention achieves equal spacing adjustment in a more stable and reliable manner, and can automatically adjust according to the medium pressure. Attached Figure Description

[0024] Figure 1 is a schematic diagram of the external structure of the plate-fin heat exchanger of the present invention;

[0025] Figure 2 is a side view of the plate-fin heat exchanger of the present invention;

[0026] Figure 3 is a schematic diagram of the structural relationship between the synchronous scissor lift mechanism and the multi-section telescopic tube of the present invention;

[0027] Figure 4 is a schematic diagram of the layout of the internal and external structures of the heat exchanger of the present invention.

[0028] Figure 5 is an enlarged schematic diagram of part A in Figure 4 of the present invention;

[0029] Figure 6 is a disassembly diagram of the water distributor and heat exchange box of the present invention;

[0030] Figure 7 is a structural disassembly diagram of the heat exchanger box of the present invention;

[0031] Figure 8 is a schematic diagram of the arrangement of the plate fins of the present invention and their connection with the multi-section telescopic mechanism;

[0032] Figure 9 is a schematic diagram of the widened rectangular waterway of the present invention;

[0033] Figure 10 is a schematic diagram of the internal structure of the plate fin of the present invention.

[0034] In the diagram: 100, heat exchange box; 101, finned plate; 1011, graphite sealing strip; 1012, corrugated cavity; 1013, end sealing plate; 102, cover plate; 103, channel steel edge; 104, bottom plate; 105, end jacket; 1051, fixing rod; 200, water distributor; 300, multi-section telescopic pipe; 301, outer sleeve; 302, hollow piston rod; 400, synchronous scissor mechanism; 500, pipeline one; 501, pipe sleeve; 600, pipeline two. Detailed Implementation

[0035] 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.

[0036] As shown in Figures 1 to 10, the present invention provides a variable-pitch plate-fin energy-saving heat exchanger, including a plurality of heat exchange boxes 100 disposed between two pressure plates, and a first pipeline 500 and a second pipeline 600 for supplying the cooled medium and the cooling medium, respectively. Each heat exchange box 100 includes a plurality of plates 101 arranged equidistantly inside, and an outer shell assembled from a cover plate 102, channel steel edges 103, and a bottom plate 104. Each plate fin 101 has an end sealing plate 1013 at both ends, and the end sealing plates 1013 of adjacent plates fins 101 are staggered to form a closed rectangular water channel.

[0037] Both the top and bottom parts of the plate fin 101 and the end sealing plate 1013 are provided with graphite sealing strips 1011 that cooperate and seal with the cover plate 102 and the bottom plate 104, and the plate fin 101 can slide laterally in the heat exchange box 100.

[0038] The interior of the plate fin 101 is used for the flow of the cooled medium, and the rectangular water channel is used for the passage of the cooling medium.

[0039] The number of heat exchange boxes 100 can be increased or decreased according to actual needs. The heat exchange boxes 100 are assembled onto a screw, with two heat exchange boxes 100 at the ends pressed together by pressure plates. Each heat exchange box 100 has several fins 101 inside, with rectangular water channels formed between adjacent fins 101 for the flow of cooling media. Each fin 101 also contains internal flow channels for the flow of the medium being cooled. Heat exchange occurs between the two media inside and outside the fins 101.

[0040] The cooling medium in the rectangular water channel is supplied through pipe 600, while the cooling medium inside the fin 101 is supplied through pipe 500. The fin 101 can slide laterally within the heat exchanger 100. Both ends of the graphite sealing strip 1011 are equipped with staggered end sealing plates 1013 to maintain a closed water channel during lateral sliding. When the cooling power of the heat exchanger is increased in the cooling system, and the injection pressure of pipe 500 is increased, the rectangular water channel is widened by the increased medium pressure. This serves two purposes: firstly, it enhances heat exchange within the system, and secondly, it prevents overpressure in the water channel from causing leaks or bursts, thus mitigating safety hazards.

[0041] Graphite sealing strip 1011 exhibits high heat resistance, wear and corrosion resistance, good self-lubricating properties, and strong chemical stability. It is particularly suitable for high-pressure sealing environments, generating low frictional resistance during friction, reducing its own wear and improving durability. In this application, the use of graphite sealing strip 1011 achieves excellent isolation effects for sealing between two water channels.

[0042] On the other hand, the water channels of this application can be designed such that the cooling medium flows in opposite directions in two adjacent rectangular water channels, in order to further improve the cooling performance.

[0043] As shown in Figures 8-10, the plate fin 101 includes wave cavities 1012 arranged at equal intervals on it, and a portion of the rectangular water channel formed between two adjacent plate fins 101 is laterally invaded by the wave cavities 1012.

[0044] The wave cavity 1012 alters the interface within the water channel of the finned plate 101. Its arc-shaped cross-section generates vortices as the medium passes through, resulting in a better convection effect and improved heat exchange. The wave cavity 1012 also partially intrudes into the rectangular water channel. As the cooling medium passes through this channel, pressure differences and vortices are generated due to the change in cross-sectional area and the arc surface, thereby rapidly completing the convective exchange between the outer and inner layers of water and improving cooling efficiency.

[0045] The wave cavity 1012 itself also enhances the structural strength of the plate fin 101, improving its pressure resistance and deformation resistance, and enabling it to adapt to cooling operations under higher pressure environments.

[0046] As shown in Figures 1, 4 and 5, the heat exchanger also includes a multi-section telescopic tube 300 disposed at both ends of the heat exchange box 100. The plate fin 101 is fixedly connected to the multi-section telescopic tube 300. The multi-section telescopic tube 300 can expand and contract synchronously with the plate fin 101 when it slides laterally. The multi-section telescopic tube 300 is connected to the pipeline 500.

[0047] The heat exchange box 100 has end jackets 105 fixedly installed at both ends to cover the inner side of the multi-section telescopic tube 300.

[0048] In this embodiment, the multi-section telescopic tube 300 is used to communicate with each plate fin 101 and also has a certain telescopic performance, so that it can move accordingly when the plate fin 101 slides laterally to adjust the width of the rectangular water channel. Alternatively, the input pressure of the cooled medium can be increased to make it actively extend, thereby adjusting the width of the water channel and improving the cooling power of the heat exchange system.

[0049] As shown in Figures 4 and 5, the multi-section telescopic tube 300 includes several plunger tubes connected end to end. Each plunger tube includes an outer sleeve 301 and a hollow piston rod 302 that are fixedly connected to each other. The hollow piston rod 302 is sleeved and interference-fitted into the outer sleeve 301 of the previous plunger tube.

[0050] The rod chamber of the outer sleeve 301 is reserved with space for the extension and retraction of the hollow piston rod 302;

[0051] The rodless cavity of the outer sleeve 301 is fixedly connected to the plate fin 101.

[0052] The multi-section telescopic tube 300 is equipped with multiple telescopic plunger cylinders, and each plunger cylinder is connected to a corresponding fin 101. The fin 101 is fixedly connected to the outer sleeve 301, and the hollow piston rod 302 on each plunger cylinder is movably sleeved with the outer sleeve 301 of the previous plunger cylinder. When the pressure of the passive cooling medium increases, each plunger cylinder extends, driving or following the fin 101 to move laterally, thus expanding the cooling water passage.

[0053] As shown in Figures 3 and 4, the pipeline 500 includes a sleeve 501, and a hollow piston rod 302 located at the end of the multi-section telescopic pipe 300 extends into the sleeve 501 and is movably sleeved with it to form an interference fit.

[0054] The sleeve 501 is designed to accommodate the extension and retraction of the hollow piston rod 302 located at the water inlet end of the multi-section telescopic pipe 300, and the extension and retraction space reserved in the sleeve 501 for the hollow piston rod 302 is the largest.

[0055] As shown in Figures 4 and 5, the plate 101 located in the middle is in a fixed state;

[0056] The closer to both ends of the multi-section telescopic tube 300, the larger the telescopic space reserved for the hollow piston rod 302 in the rod chamber of the outer sleeve 301 corresponding to the plunger cylinder. The telescopic space reserved for the hollow piston rod 302 in the sleeve 501 and the outer sleeve 301 located at the end is the largest.

[0057] The multi-section telescopic pipe 300 is equipped with a synchronous scissor mechanism 400, and each outer sleeve 301 is connected to a cross axis of the synchronous scissor mechanism 400. When the water pressure in the multi-section telescopic pipe 300 increases, it will push the outer sleeve 301 and the hollow piston rod 302 in each plunger cylinder to telescopically displace, thereby driving the fin 101 to move laterally and widen the rectangular water channel.

[0058] The movement speeds of the nodes in each scissor lift unit vary to some extent. The middle node is stationary, while the movement speed of the nodes near the ends gradually increases, resulting in a greater displacement at the ends. However, the widening range of each rectangular waterway is the same. Therefore, the maximum widening range of the rectangular waterway mainly depends on the maximum displacement distance of the hollow piston rods 302 at both ends. Thus, this application sets the space for the hollow piston rods 302 to expand in the rod chamber of the outer sleeve 301 of the plunger cylinder as it approaches the ends of the multi-section telescopic pipe 300. This allows for an adaptive expansion of the maximum widening range of each waterway level.

[0059] The synchronous scissor mechanism 400 is set up mainly to control the synchronous movement of each plate 101, so as to avoid the displacement distance of each plate 101 or each section of the plunger cylinder of the multi-section telescopic pipe 300 being different, resulting in different widths of the rectangular waterway.

[0060] As shown in Figures 1 and 3, the end sleeve 105 is fixed with bolts and studs to the rod 1051. The rod 1051 is set at both ends of the synchronous scissor mechanism 400 to control the maximum extension length of the synchronous scissor mechanism 400. The fixed position of the rod 1051 is adjustable along the extension direction of the synchronous scissor mechanism 400.

[0061] The fixing rod 1051 is mainly used for positioning and limiting the maximum extension length of the synchronous scissor mechanism 400, thereby controlling the maximum width of the rectangular water channel. The fixing position of the fixing rod 1051 can be adjusted reasonably according to different situations.

[0062] Simultaneously, the fixing rod 1051 can be replaced with other manual or electric drive components, allowing the length of the synchronous scissor mechanism 400 to be compressed, thereby shortening the spacing between each fin 101 and reducing the width of the rectangular water channel. Those skilled in the art can configure the above solution as needed, which constitutes a reasonable variation based on the solution of this application.

[0063] As shown in Figures 4 and 6, both ends of the cover plate 102 are provided with water distributors 200 for introducing cooling medium into the rectangular water channels inside the heat exchange box 100. The bottom of the water distributor 200 is provided with water inlets for connecting each rectangular water channel to introduce cooling medium into them.

[0064] The water inlets of the water distributor 200 each correspond to a rectangular water channel. The water inlets near both ends are offset outwards by a certain distance on the water channel to prevent them from being misplaced into other water channels when the water channel is widened due to the movement of the fin 101.

[0065] When the rectangular water channel is set as an interlaced bidirectional water channel, the main pipe of the water distributor 200 can be configured into two water channels, one for injecting the medium and the other for returning the medium.

[0066] Working principle and usage process of this invention:

[0067] The cooling medium in the rectangular water channel is supplied through pipe 600, while the cooling medium inside the fins 101 is supplied through pipe 500. The fins 101 can slide laterally within the heat exchanger 100. Both ends of the graphite sealing strip 1011 are equipped with staggered end-sealing plates 1013 to maintain a closed water channel during lateral sliding. When the cooling power of the heat exchanger is increased in the cooling system, the injection pressure of pipe 500 is increased, causing the rectangular water channel to widen due to the increased medium pressure. Multi-section telescopic pipes 300 connect to each fin 101 and also possess a certain degree of telescopic capability, allowing them to move accordingly when the fins 101 slide laterally to adjust the width of the rectangular water channel. Alternatively, the input pressure of the cooling medium can be increased to cause it to actively extend, thus adjusting the water channel width and increasing the cooling power of the heat exchange system. The multi-section telescopic tube 300 is equipped with multiple telescopic plunger cylinders, each plunger cylinder being connected to a corresponding fin 101. The fin 101 is fixedly connected to the outer sleeve 301, and the hollow piston rod 302 on each plunger cylinder is movably sleeved with the outer sleeve 301 of the preceding plunger cylinder. When the pressure of the passive cooling medium increases, each plunger cylinder extends, driving or following the fin 101 to move laterally, thus expanding the cooling water channel. The multi-section telescopic tube 300 is equipped with a synchronous scissor mechanism 400, and each outer sleeve 301 is connected to a cross axis of the synchronous scissor mechanism 400. When the water pressure in the multi-section telescopic tube 300 increases, it will push the outer sleeve 301 and the hollow piston rod 302 in each plunger cylinder to telescopically move, thereby driving the fin 101 to move laterally and widen the rectangular water channel.

[0068] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0069] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A variable-pitch plate-fin energy-saving heat exchanger, comprising a plurality of heat exchange boxes (100) disposed between two pressure plates, and further comprising a first pipe (500) and a second pipe (600) for supplying the cooled medium and the cooling medium, respectively, characterized in that: The heat exchange box (100) includes several equidistant plates (101) arranged inside, and an outer shell spliced ​​from a cover plate (102), channel steel edge (103) and a bottom plate (104). Both ends of the plates (101) are provided with end sealing plates (1013), and the end sealing plates (1013) of two adjacent plates (101) are staggered to form a closed rectangular water channel. The top and bottom parts of the plates (101) and the end sealing plates (1013) are provided with graphite sealing strips (1011) that cooperate and seal with the cover plate (102) and the bottom plate (104). The plates (101) can slide laterally inside the heat exchange box (100). The interior of the plates (101) is used for the flow of the cooled medium, and the rectangular water channel is used for the flow of the cooling medium. The heat exchanger also includes multiple telescopic pipes (30) provided at both ends of the heat exchange box (100). 0), the plate fin (101) is fixedly connected to the multi-section telescopic tube (300), the multi-section telescopic tube (300) can expand and contract synchronously when the plate fin (101) slides laterally, the multi-section telescopic tube (300) is connected to the pipeline (500); the heat exchange box (100) is fixedly installed with end sleeves (105) to cover the multi-section telescopic tube (300) inside; the multi-section telescopic tube (300) includes several plunger cylinders connected end to end, the plunger cylinder includes an outer sleeve (301) and a hollow piston rod (302) fixedly connected to each other, the hollow piston rod (302) is sleeved and interference-fitted in the outer sleeve (301) of the previous plunger cylinder; the rod cavity of the outer sleeve (301) is reserved for the expansion and contraction space of the hollow piston rod (302); the rodless cavity of the outer sleeve (301) is fixedly connected to the plate fin (101).

2. The variable-pitch plate-fin energy-saving heat exchanger according to claim 1, characterized in that: The plate fin (101) includes wave cavities (1012) arranged at equal intervals on it, and the rectangular water channel formed between two adjacent plate fins (101) is laterally invaded by the wave cavities (1012).

3. The variable-pitch plate-fin energy-saving heat exchanger according to claim 1, characterized in that: The pipeline (500) includes a sleeve (501), and a hollow piston rod (302) located at the end of the multi-section telescopic pipe (300) extends into the sleeve (501) and is movably sleeved therewith to form an interference fit.

4. A variable-pitch plate-fin energy-saving heat exchanger according to claim 3, characterized in that: The plate fin (101) located in the middle is in a fixed state; the closer it gets to both ends of the multi-section telescopic tube (300), the larger the telescopic space reserved for the hollow piston rod (302) in the rod chamber of the outer sleeve (301) of the corresponding plunger cylinder, and the maximum telescopic space reserved for the hollow piston rod (302) by the sleeve (501) and the outer sleeve (301) located at the end.

5. A variable-pitch plate-fin energy-saving heat exchanger according to claim 3 or 4, characterized in that: The multi-section telescopic tube (300) is equipped with a synchronous scissor mechanism (400), and each section of the outer sleeve (301) is connected to a cross axis of the synchronous scissor mechanism (400).

6. A variable-pitch plate-fin energy-saving heat exchanger according to claim 5, characterized in that: The end sleeve (105) is fixed with bolts and studs to a rod (1051). The rod (1051) is set at both ends of the synchronous scissor mechanism (400) to control the maximum extension length of the synchronous scissor mechanism (400). The fixed position of the rod (1051) is adjustable along the extension direction of the synchronous scissor mechanism (400).

7. A variable-pitch plate-fin energy-saving heat exchanger according to claim 1, characterized in that: Both ends of the cover plate (102) are provided with water distributors (200) for introducing cooling medium into the rectangular water channels inside the heat exchange box (100). The bottom of the water distributor (200) is provided with water inlets for connecting each rectangular water channel to introduce cooling medium into it.

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