Multi-channel heat exchanger

Abstract

The invention relates to the technical field of heat exchangers, and particularly discloses a multi-channel heat exchanger which comprises an upper cylinder, a lower cylinder is arranged at the bottom end of the upper cylinder, the upper cylinder and the lower cylinder are connected through a flange, a circular plate is fixedly connected to the bottom of the inner wall of the upper cylinder, and a plurality of heat exchange pipes are fixedly inserted into the surface of the circular plate. The bottom of the outer wall of the heat exchange pipe is fixedly connected with a baffle, an O-shaped sealing ring is detachably installed on the annular side of the baffle, a liquid inlet assembly is arranged on the top of the upper barrel, wall attaching assemblies are arranged on the inner side and the lower portion of the upper barrel, and each wall attaching assembly comprises a long rod arranged in the heat exchange pipe and further comprises a sleeve fixedly connected to the top of the inner wall of the upper barrel. Through cooperation of the structure, cold fluid can flow downwards along the inner wall of the heat exchange tube in a liquid film shape, due to the fact that the liquid film is thin, the heat exchange effect between cold and hot media can be improved, and the heat exchange effect can be improved without adopting a long tube pass and shell pass mode.

Description

Technical Field

[0001] The invention relates to the technical field of heat exchangers, and in particular to a multi-channel heat exchanger. Background Art

[0002] Heat exchanger is a device that transfers part of the heat of hot fluid to cold fluid. Heat exchanger plays an important role in chemical, petroleum, power, food and many other industrial production. In chemical production, heat exchanger can be used as heater, cooler, condenser, evaporator and reboiler, etc. Shell and tube heat exchanger is also called multi-channel heat exchanger.

[0003] When the multi-channel heat exchanger is in use, when the cold and hot fluids flow continuously in the tube side and the shell side respectively, they exchange heat through the tube wall to achieve the purpose of heating or cooling. However, when the temperature difference between the cold and hot fluids is small, the heat exchange effect will be poor, thereby affecting the heat exchange effect of the two fluid media. In the prior art, in order to solve the problem of poor heat exchange due to the small temperature difference between the cold and hot fluids, longer tube sides and shell sides are usually designed to achieve the purpose of increasing the heat exchange time, thereby improving the heat exchange effect. However, this method of increasing the tube side and shell side leads to an increase in the overall length of the heat exchanger, resulting in more space required for the placement of the heat exchanger. In addition, increasing the tube side and shell side also increases the amount of material used to make the heat exchanger, thereby increasing the cost of the heat exchanger. Summary of the invention

[0004] The object of the present invention is to provide a multi-channel heat exchanger, which can make the cold fluid flow downward along the inner wall of the heat exchange tube in the form of a liquid film. Since the liquid film is thin, it is beneficial to improve the heat exchange effect between the cold and hot media, and can avoid using longer tube and shell passes to improve the heat exchange effect, so as to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a multi-channel heat exchanger, comprising an upper tube, a lower tube is arranged at the bottom end of the upper tube, the upper tube and the lower tube are connected by a flange, a circular plate is fixedly connected to the bottom of the inner wall of the upper tube, a heat exchange tube is fixedly plugged on the surface of the circular plate, a plurality of heat exchange tubes are arranged, a baffle plate is fixedly connected to the bottom of the outer wall of the plurality of heat exchange tubes, an O-ring is detachably installed on the ring side of the baffle plate, a liquid inlet assembly is arranged on the top of the upper tube, and a sealing member is arranged on the inner side and the bottom of the upper tube. A wall assembly, wherein the wall-attached assembly includes a long rod arranged inside the heat exchange tube, the wall-attached assembly also includes a sleeve fixedly connected to the top of the inner wall of the upper tube, the inner side of the sleeve is threadedly connected to the long rod, the wall-attached assembly also includes a movable plate fixedly connected to the inner wall of the upper tube and located above the circular plate, the outer wall of the long rod is rotatably connected to the movable plate, the outer wall of the long rod is located inside the heat exchange tube and is fixedly connected to a guide block, the front and rear ends of the upper end of the upper tube are fixedly connected to hydraulic rods, and the output shaft of the hydraulic rod passes through the upper tube and is fixedly connected to the movable plate.

[0006] Preferably, the top of the guide block is tilted, and a rib is fixedly connected to the top of the guide block, and a plurality of ribs are provided.

[0007] Preferably, a plurality of guide blocks are fixedly connected to the outer wall of a single long rod, and the guide blocks are evenly distributed on the outer wall of the long rod.

[0008] Preferably, the liquid inlet assembly comprises a liquid inlet cylinder arranged above the upper cylinder, a branch pipe is fixedly plugged into the ring side of the liquid inlet cylinder, and a plurality of branch pipes are provided, and the bottom of the branch pipe is fixedly plugged into the top of the upper cylinder.

[0009] Preferably, the top of the long rod in the middle position passes through the top of the upper cylinder and is fixedly connected to a cone block, the top of the cone block is inclined, the interiors of the plurality of branch pipes are rotatably connected to connecting shafts, the outer walls of the connecting shafts are fixedly connected to gears, the bottoms of the connecting shafts are fixedly connected to a stirring rack, the side of the branch pipe close to the cone block is slidably connected to a rack, the side of the rack close to the cone block is fixedly connected to a connecting rack, the outer wall of the branch pipe is fixedly connected to a small plate, and the outer wall of the rack is slidably connected to the small plate.

[0010] Preferably, a ball is rotatably connected to one side of the connecting frame close to the cone block, a second spring is fixedly connected between the small plate and the branch pipe, and the rack is meshed with the gear.

[0011] Preferably, the inner wall of the upper cylinder is fixedly connected with a flow equalizing plate between the circular plate and the movable plate, and the surfaces of the flow equalizing plate and the movable plate are provided with water leakage holes, and the water leakage holes on the flow equalizing plate and the water leakage holes on the movable plate are staggered, and a water cover is provided at the bottom of the water leakage holes on the flow equalizing plate, and the water cover is located on the outside of the long rod, and the top of the water cover is fixedly connected to the bottom of the flow equalizing plate.

[0012] Preferably, a descaling assembly is arranged below the water cover, and the descaling assembly includes a movable cover fixedly plugged into the bottom of a plurality of long rods, and the descaling assembly also includes a fixed plate fixedly connected to the bottom of the outer side of the lower cylinder, and the top of the fixed plate is fixedly connected to an electric telescopic rod, and the output shaft of the electric telescopic rod passes through the fixed plate and is fixedly connected to a piston plate, and the descaling assembly also includes an air cylinder fixedly connected to the outer side of the lower cylinder and located below the fixed plate, and the outer wall of the piston plate is in contact with the inner wall of the air cylinder, the interiors of the movable cover and the long rods are both hollow, and the interiors of the movable cover and the long rods are connected, and a hose is fixedly plugged into the bottom of the air cylinder, and the end of the hose away from the air cylinder is fixedly plugged into the movable cover.

[0013] Preferably, a hollow groove is provided inside the guide block, a rubber membrane is fixedly connected to the outside of the guide block, and the hollow groove is communicated with the inside of the long rod.

[0014] Preferably, a filter assembly is provided below the baffle plate, and the filter assembly includes a filter cover threadedly connected to the bottom of the heat exchange tube, a filter ring is fixedly connected to the bottom of the filter cover, filter holes are provided on the surface of the filter ring, a slide groove is provided on the outer wall of the long rod near the filter ring, a scraper is fixedly connected to the inner wall of the slide groove, and a first spring is fixedly connected between the top of the scraper and the long rod.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. Through the action of the wall-attached component, the cold fluid can flow downward along the inner wall of the heat exchange tube in the form of a liquid film. Since the liquid film is thin, it is beneficial to improve the heat exchange effect between the cold and hot media, and it can avoid using a longer tube pass and shell pass to improve the heat exchange effect;

[0017] 2. Through the action of the liquid inlet assembly, the cold fluid is further evenly distributed, so that a more uniform liquid film is formed inside the multiple heat exchange tubes to improve the efficiency of heat exchange;

[0018] 3. Through the action of the descaling component, the guide block can move with the rubber film to scrape the inner wall of the heat exchange tube for descaling. This can improve the heat exchange efficiency and make the subsequent liquid film more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is the overall structural view of the present invention;

[0021] Figure 2 It is a schematic diagram of a half-section structure of the present invention;

[0022] Figure 3 It is a half-section structural schematic diagram of the upper cylinder of the present invention;

[0023] Figure 4 It is a schematic diagram of the side cross-section structure of the upper cylinder of the present invention;

[0024] Figure 5 It is a partial half-section structural schematic diagram of the lower barrel of the present invention;

[0025] Figure 6 It is a schematic diagram of a half-section structure of a branch pipe of the present invention;

[0026] Figure 7 It is a schematic diagram of the half-section structure of the filter cover of the present invention.

[0027] Description of reference numerals:

[0028] 1. Upper cylinder; 2. Lower cylinder; 3. Round plate; 4. Heat exchange tube; 5. Blocking plate; 6. Liquid inlet assembly; 61. Liquid inlet cylinder; 62. Branch pipe; 63. Connecting shaft; 64. Gear; 65. Stirring frame; 66. Rack; 67. Connecting frame; 68. Small plate; 69. Round ball; 610. Second spring; 7. Wall-attached assembly; 71. Long rod; 72. Sleeve; 73. Moving plate; 74. Guide block; 75. Rib; 8. Descaling assembly ;81. Moving cover;82. Fixed plate;83. Electric telescopic rod;84. Piston plate;85. Air cylinder;86. Hose;9. Filter assembly;91. Filter cover;92. Filter ring;93. Filter hole;94. Slide;95. Scraper;96. First spring;10. O-ring;11. Cone block;12. Flow equalizing plate;13. Leakage hole;14. Water cover;15. Empty slot;16. Rubber membrane;17. Hydraulic rod. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] See also Figures 1 to 5 The present invention provides a technical solution: a multi-channel heat exchanger, comprising an upper tube 1, a lower tube 2 is arranged at the bottom end of the upper tube 1, the upper tube 1 and the lower tube 2 are connected by a flange, a circular plate 3 is fixedly connected to the bottom of the inner wall of the upper tube 1, a heat exchange tube 4 is fixedly plugged on the surface of the circular plate 3, a plurality of heat exchange tubes 4 are arranged, a baffle plate 5 is fixedly connected to the bottom of the outer wall of the plurality of heat exchange tubes 4, an O-ring 10 is detachably installed on the ring side of the baffle plate 5, a liquid inlet component 6 is arranged on the top of the upper tube 1, a wall-attached component 7 is arranged on the inner side and the bottom of the upper tube 1, the wall-attached component 7 includes a long rod 71 arranged inside the heat exchange tube 4, and the wall-attached component 7 also includes a sleeve 72 fixedly connected to the top of the inner wall of the upper cylinder 1, the inner side of the sleeve 72 is threadedly connected to the long rod 71, the wall-attaching component 7 also includes a movable plate 73 fixedly connected to the inner wall of the upper cylinder 1 and located above the circular plate 3, the outer wall of the long rod 71 is rotatably connected to the movable plate 73, the outer wall of the long rod 71 is located inside the heat exchange tube 4 and is fixedly connected with a guide block 74, the front and rear ends of the upper end of the upper cylinder 1 are fixedly connected with a hydraulic rod 17, the output shaft of the hydraulic rod 17 passes through the upper cylinder 1 and is fixedly connected with the movable plate 73, the top of the guide block 74 is inclined, the top of the guide block 74 is fixedly connected with a rib 75, and a plurality of ribs 75 are provided.

[0031] By adopting the above technical solution, the O-ring 10 is a mature existing technology, and its installation method is not described in detail. The O-ring 10 plays a sealing role between the ring side of the baffle plate 5 and the outer wall of the lower tube 2.

[0032] An inlet pipe is fixedly connected to the outside of the lower tube 2 above the baffle plate 5, and an outlet pipe is fixedly connected to the bottom of the outer wall of the lower tube 2, and a liquid outlet pipe is fixedly connected to the bottom of the outer wall of the baffle plate 5. When in use, the cold fluid to be heated is added from the liquid inlet assembly 6 to the interior of the upper tube 1, and then the cold fluid flows to the position of the circular plate 3 and flows into the interior of the heat exchange tube 4, and hot fluid is added from the inside of the inlet pipe, and the hot fluid enters the lower tube 2 at the position above the baffle plate 5 to heat the hot fluid inside the heat exchange tube 4, thereby realizing heat exchange, and the heat exchange tube 4 is made of metal material with strong thermal conductivity, and the cold fluid after heat exchange is discharged from the liquid outlet pipe.

[0033] When in use, during heat exchange, the output shaft of the hydraulic rod 17 is continuously extended and retracted, so that the movable plate 73 can be continuously moved up and down, so that the long rod 71 moves up and down with the guide block 74, and the long rod 71 rotates during the up and down movement under the action of the threaded connection between the inner side of the sleeve 72 and the long rod 71, so that the guide block 74 rotates. When the cold fluid falls on the top surface of the guide block 74, under the action of the rotation of the guide block 74 and the action of the ribs 75, the cold fluid falling on the top surface of the guide block 74 is easily thrown onto the inner wall of the heat exchange tube 4, so that the cold fluid flows downward along the inner wall of the heat exchange tube 4 in the form of a liquid film. Since the liquid film is thin, it is beneficial to improve the heat exchange effect between the cold and hot media, and the use of longer tube and shell passes to improve the heat exchange effect can be avoided.

[0034] It should be noted that the pitch of the thread opened on the long rod 71 of the device near the sleeve 72 is set to be larger, which is conducive to reducing friction during movement, and the threaded connection between the thread opened on the long rod 71 and the sleeve 72 is similar to the threaded connection between the screw part and the flying saucer of a hand-propelled flying saucer, ensuring that when the long rod 71 is displaced up and down, it can rotate itself.

[0035] It should be noted that when adding cold fluid, the amount of cold fluid added needs to be controlled. If too much is added, the liquid film may be thicker, affecting the heat exchange effect. If too little is added, the heat exchange efficiency will be affected.

[0036] Specifically, Figure 2 and Figure 5 As shown, a plurality of guide blocks 74 are fixedly connected to the outer wall of a single long rod 71 , and the guide blocks 74 are evenly distributed on the outer wall of the long rod 71 .

[0037] By adopting the above technical solution, the design of multiple guide blocks 74 makes it possible that when the local liquid film is thicker and causes part of the cold fluid to flow to the area of ​​the guide block 74, the guide block 74 can smoothly throw the liquid to the inner wall of the heat exchange tube 4, ensuring that the liquid flows downward in the form of a liquid film, thereby further ensuring a better heat exchange effect.

[0038] Specifically, Figures 1 to 4 and Figure 6As shown, the liquid inlet assembly 6 includes a liquid inlet cylinder 61 arranged above the upper cylinder 1, a branch pipe 62 is fixedly inserted on the ring side of the liquid inlet cylinder 61, and a plurality of branch pipes 62 are provided, the bottom of the branch pipe 62 is fixedly inserted with the top of the upper cylinder 1, the top of the long rod 71 in the middle position passes through the top of the upper cylinder 1 and is fixedly connected to a cone block 11, the top of the cone block 11 is inclined, the interiors of the plurality of branch pipes 62 are all rotatably connected to a connecting shaft 63, the outer wall of the connecting shaft 63 is fixedly connected to a gear 64, and the connecting shaft 63 is fixedly connected to a gear 64. A stirring frame 65 is fixedly connected to the bottom of the connecting shaft 63, a rack 66 is slidably connected to the side of the branch pipe 62 close to the cone block 11, a connecting frame 67 is fixedly connected to the side of the rack 66 close to the cone block 11, a small plate 68 is fixedly connected to the outer wall of the branch pipe 62, the outer wall of the rack 66 is slidably connected to the small plate 68, a ball 69 is rotatably connected to the side of the connecting frame 67 close to the cone block 11, a second spring 610 is fixedly connected between the small plate 68 and the branch pipe 62, and the rack 66 is meshed with the gear 64.

[0039] By adopting the above technical solution, when adding cold fluid, the external input pipe is connected to the top of the liquid inlet cylinder 61, and the cold fluid is input into the liquid inlet cylinder 61. The design of multiple branch pipes 62 allows the cold fluid to flow out evenly from the multiple branch pipes 62, thereby distributing the cold fluid more evenly, which is conducive to the uniform amount of cold fluid entering the interior of the multiple heat exchange tubes 4, thereby forming a more uniform liquid film inside the multiple heat exchange tubes 4, further improving the heat exchange effect.

[0040] When the output shaft of the hydraulic rod 17 is continuously extended and retracted, the movable plate 73 moves up and down with the long rod 71, and the cone block 11 moves up and down. In this process, when the cone block 11 moves upward, the cone block 11 squeezes the connecting frame 67, and the second spring 610 is compressed, so that the connecting frame 67 moves away from the cone block 11 with the rack 66. Under the action of the meshing of the rack 66 and the gear 64, the connecting shaft 63 rotates, which can rotate the stirring frame 65, stir the cold fluid falling from the branch pipe 62, and further facilitate the more uniform distribution of the cold fluid, thereby further forming a more uniform liquid film inside the multiple heat exchange tubes 4 and improving the heat exchange effect.

[0041] When the cone block 11 moves downward, the cone block 11 is away from the connecting frame 67 , and under the action of the elastic force of the second spring 610 itself, the connecting frame 67 is reset, so that the rack 66 slides and resets along the small plate 68 .

[0042] It should be noted that the design of the ball 69 is conducive to reducing the friction between the connecting frame 67 and the cone block 11.

[0043] Specifically, Figures 2 to 4As shown, the inner wall of the upper cylinder 1 is located between the circular plate 3 and the movable plate 73 and is fixedly connected with a flow equalizing plate 12. The surfaces of the flow equalizing plate 12 and the movable plate 73 are both provided with leakage holes 13. The leakage holes 13 provided on the flow equalizing plate 12 and the leakage holes 13 provided on the movable plate 73 are staggered. A water cover 14 is provided at the bottom of the leakage holes 13 provided on the flow equalizing plate 12. The water cover 14 is located on the outside of the long rod 71, and the top of the water cover 14 is fixedly connected to the bottom of the flow equalizing plate 12.

[0044] By adopting the above technical solution, when the cold fluid falling from the branch pipe 62 enters the interior of the upper cylinder 1, it falls on the movable plate 73 in a relatively dispersed manner under the action of the rotation of the stirring frame 65, and the leakage holes 13 opened on the flow equalizing plate 12 and the leakage holes 13 opened on the movable plate 73 are staggered to further improve the uniformity of the downward flow of the cold fluid, and the internal inclination of the water cover 14 is conducive to guiding the cold fluid to the surface of the long rod 71, so that the cold fluid falls more evenly from the long rod 71 to the top surface of the guide block 74, thereby facilitating the uniformity of the liquid film in the multiple heat exchange tubes 4 and improving the heat exchange efficiency.

[0045] Specifically, Figure 2 and Figures 5 to 7 As shown, a descaling assembly 8 is arranged below the water cover 14, and the descaling assembly 8 includes a mobile cover 81 fixedly plugged into the bottom of a plurality of long rods 71, and the descaling assembly 8 also includes a fixed plate 82 fixedly connected to the bottom of the outer side of the lower cylinder 2, and an electric telescopic rod 83 is fixedly connected to the top of the fixed plate 82, and the output shaft of the electric telescopic rod 83 passes through the fixed plate 82 and is fixedly connected to a piston plate 84, and the descaling assembly 8 also includes an air cylinder 85 fixedly connected to the outer side of the lower cylinder 2 and located below the fixed plate 82, and the outer wall of the piston plate 84 is in contact with the inner wall of the air cylinder 85, the interiors of the mobile cover 81 and the long rod 71 are both hollow, and the mobile cover 81 and the interior of the long rod 71 are connected, and a hose 86 is fixedly plugged into the bottom of the air cylinder 85, and one end of the hose 86 away from the air cylinder 85 is fixedly plugged into the mobile cover 81, and an empty groove 15 is opened in the guide block 74, and a rubber membrane 16 is fixedly connected to the outer side of the guide block 74, and the empty groove 15 is connected to the interior of the long rod 71.

[0046] By adopting the above technical solution, the design of the fixing plate 82 is used to fix the electric telescopic rod 83. After long-term use, scale is easily generated inside the heat exchange tube 4, which affects the heat exchange effect on the one hand and the stability of the liquid film in the heat exchange tube 4 on the other hand. Therefore, the present solution is provided with a descaling component 8. When descaling is performed, the heat exchange is stopped, and the output shaft of the electric telescopic rod 83 is extended to make the piston plate 84 move downward. Since the outer wall of the piston plate 84 is in contact with the inner wall of the gas cylinder 85, when the piston plate 84 moves downward, the gas inside the gas cylinder 85 can be pushed into the gas cylinder 85. The hose 86 allows the gas to enter the interior of the movable cover 81 and the interior of the long rod 71, thereby allowing the gas to enter the interior of the empty groove 15. Under the action of the gas pressure, the rubber membrane 16 can be expanded, so that the outer side of the rubber membrane 16 fits the inner wall of the heat exchange tube 4. At this time, the output shaft of the hydraulic rod 17 is extended and retracted, so that the movable plate 73 can move with the long rod 71, and the guide block 74 can move with the rubber membrane 16 to scrape the inner wall of the heat exchange tube 4 for descaling. This can subsequently improve the heat exchange efficiency and make the subsequent liquid film formed more stable.

[0047] When heat exchange is required, the output shaft of the electric telescopic rod 83 contracts, the gas returns to the inside of the gas cylinder 85, and the rubber membrane 16 returns to the initial state.

[0048] Specifically, Figure 2 , Figure 5 and Figure 7 As shown, a filter assembly 9 is provided below the baffle plate 5, and the filter assembly 9 includes a filter cover 91 threadedly connected to the bottom of the heat exchange tube 4, a filter ring 92 is fixedly connected to the bottom of the filter cover 91, a filter hole 93 is provided on the surface of the filter ring 92, a slide groove 94 is provided on the outer wall of the long rod 71 near the filter ring 92, a scraper 95 is fixedly connected to the inner wall of the slide groove 94, and a first spring 96 is fixedly connected between the top of the scraper 95 and the long rod 71.

[0049] By adopting the above technical solution, the filter cover 91 can collect scale and impurities, and the cold fluid passes through the filter holes 93 opened on the surface of the filter ring 92, and the scale and impurities remain inside the filter cover 91, so as to prevent the scale and impurities from affecting the cleanliness of the cold fluid. When the movable plate 73 moves up and down with the long rod 71, the long rod 71 rotates continuously, thereby causing the scraper 95 to rotate so as to scrape the top surface of the filter ring 92 to prevent the filter holes 93 from being blocked.

[0050] It should be noted that, under the elastic force of the first spring 96, when the long rod 71 moves, the scraper 95 and the slide groove 94 are relatively displaced, so that the bottom of the scraper 95 remains in contact with the top surface of the filter ring 92 to improve the cleaning effect.

[0051] Working principle: The cold fluid is input into the liquid inlet cylinder 61. The design of multiple branch pipes 62 allows the cold fluid to flow out evenly from the multiple branch pipes 62. Under the action of the rotation of the stirring frame 65, the cold fluid falls on the movable plate 73 in a relatively dispersed manner. The leakage holes 13 opened on the flow equalizing plate 12 and the leakage holes 13 opened on the movable plate 73 are staggered to improve the uniformity of the cold fluid flowing downward. During heat exchange, the output shaft of the hydraulic rod 17 is continuously extended and retracted, so that the movable plate 73 can be continuously moved up and down, so that the long rod 71 moves up and down with the guide block 74, and the sleeve The inner side of the tube 72 is threadedly connected to the long rod 71, so that the long rod 71 rotates during the up and down movement, thereby causing the guide block 74 to rotate. When the cold fluid falls on the top surface of the guide block 74, the guide block 74 rotates and cooperates with the ribs 75 to easily throw the cold fluid falling on the top surface of the guide block 74 onto the inner wall of the heat exchange tube 4, so that the cold fluid flows downward along the inner wall of the heat exchange tube 4 in the form of a liquid film. Since the liquid film is thin, it is beneficial to improve the heat exchange effect between the cold and hot media, and can avoid the use of longer tube and shell passes to improve the heat exchange effect.

[0052] When the output shaft of the hydraulic rod 17 is continuously extended and retracted, the movable plate 73 moves up and down with the long rod 71, and the cone block 11 moves up and down. In this process, when the cone block 11 moves upward, the cone block 11 squeezes the connecting frame 67, and the second spring 610 is compressed, so that the connecting frame 67 moves away from the cone block 11 with the rack 66. Under the action of the meshing of the rack 66 and the gear 64, the connecting shaft 63 rotates, which can rotate the stirring frame 65, stir the cold fluid falling from the branch pipe 62, and further facilitate the more uniform distribution of the cold fluid, thereby further forming a more uniform liquid film inside the multiple heat exchange tubes 4 and improving the heat exchange effect.

[0053] The output shaft of the electric telescopic rod 83 extends, causing the piston plate 84 to move downward. Since the outer wall of the piston plate 84 fits with the inner wall of the gas cylinder 85, when the piston plate 84 moves downward, the gas inside the gas cylinder 85 can be pushed into the hose 86, so that the gas enters the interior of the movable cover 81 and the interior of the long rod 71, thereby allowing the gas to enter the interior of the empty groove 15. Under the action of the gas pressure, the rubber membrane 16 can be expanded, so that the outer side of the rubber membrane 16 fits with the inner wall of the heat exchange tube 4. At this time, the output shaft of the hydraulic rod 17 is extended and retracted, so that the movable plate 73 can move with the long rod 71, and the guide block 74 can move with the rubber membrane 16 to scrape the inner wall of the heat exchange tube 4 for descaling. This can subsequently improve the heat exchange efficiency and make the subsequent liquid film formed more stable.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multi-channel heat exchanger, comprising an upper cylinder (1), characterized in that: A lower tube (2) is arranged at the bottom end of the upper tube (1), and the upper tube (1) and the lower tube (2) are connected via a flange. A circular plate (3) is fixedly connected to the bottom of the inner wall of the upper tube (1), and a heat exchange tube (4) is fixedly plugged into the surface of the circular plate (3). A plurality of heat exchange tubes (4) are arranged, and a blocking plate (5) is fixedly connected to the bottom of the outer walls of the plurality of heat exchange tubes (4), and an O-ring (10) is detachably mounted on the ring side of the blocking plate (5); A liquid inlet assembly (6) is arranged at the top of the upper cylinder (1), and a wall-attaching assembly (7) is arranged on the inner side and the lower side of the upper cylinder (1). The wall-attaching assembly (7) comprises a long rod (71) arranged inside the heat exchange tube (4). The wall-attaching assembly (7) also comprises a sleeve (72) fixedly connected to the top of the inner wall of the upper cylinder (1), and the inner side of the sleeve (72) is threadedly connected to the long rod (71). The wall-attaching assembly (7) also comprises a movable plate (73) fixedly connected to the inner wall of the upper cylinder (1) and located above the circular plate (3). The outer wall of the long rod (71) is rotatably connected to the movable plate (73), and the outer wall of the long rod (71) is located inside the heat exchange tube (4) and is fixedly connected to a guide block (74). The front and rear ends of the upper end of the upper cylinder (1) are fixedly connected to hydraulic rods (17), and the output shaft of the hydraulic rod (17) passes through the upper cylinder (1) and is fixedly connected to the movable plate (73).

2. A multi-channel heat exchanger according to claim 1, characterized in that: The top of the guide block (74) is arranged tilted, and a rib (75) is fixedly connected to the top of the guide block (74), and a plurality of ribs (75) are arranged.

3. A multi-channel heat exchanger according to claim 1, characterized in that: A plurality of guide blocks (74) are fixedly connected to the outer wall of a single long rod (71), and the guide blocks (74) are evenly distributed on the outer wall of the long rod (71).

4. A multi-channel heat exchanger according to claim 1, characterized in that: The liquid inlet assembly (6) comprises a liquid inlet cylinder (61) arranged above the upper cylinder (1), a branch pipe (62) is fixedly plugged into the ring side of the liquid inlet cylinder (61), and a plurality of branch pipes (62) are provided, and the bottom of the branch pipe (62) is fixedly plugged into the top of the upper cylinder (1).

5. A multi-channel heat exchanger according to claim 4, characterized in that: The top of the long rod (71) in the middle position passes through the top of the upper cylinder (1) and is fixedly connected to a cone block (11); the top of the cone block (11) is inclined; the interiors of the plurality of branch pipes (62) are rotatably connected to connecting shafts (63); the outer wall of the connecting shaft (63) is fixedly connected to a gear (64); the bottom of the connecting shaft (63) is fixedly connected to a stirring frame (65); the side of the branch pipe (62) close to the cone block (11) is slidably connected to a rack (66); the side of the rack (66) close to the cone block (11) is fixedly connected to a connecting frame (67); the outer wall of the branch pipe (62) is fixedly connected to a small plate (68); the outer wall of the rack (66) is slidably connected to the small plate (68).

6. A multi-channel heat exchanger according to claim 5, characterized in that: A ball (69) is rotatably connected to one side of the connecting frame (67) close to the cone block (11), a second spring (610) is fixedly connected between the small plate (68) and the branch pipe (62), and the rack (66) is meshed with the gear (64).

7. The multi-channel heat exchanger according to claim 1, characterized in that: The inner wall of the upper cylinder (1) is fixedly connected with a flow equalizing plate (12) between the circular plate (3) and the movable plate (73); the surfaces of the flow equalizing plate (12) and the movable plate (73) are both provided with water leakage holes (13); the water leakage holes (13) provided on the flow equalizing plate (12) and the water leakage holes (13) provided on the movable plate (73) are arranged alternately; a water cover (14) is provided at the bottom of the water leakage holes (13) provided on the flow equalizing plate (12); the water cover (14) is located on the outside of the long rod (71); and the top of the water cover (14) is fixedly connected to the bottom of the flow equalizing plate (12).

8. A multi-channel heat exchanger according to claim 7, characterized in that: A descaling assembly (8) is arranged below the water cover (14), the descaling assembly (8) comprising a movable cover (81) fixedly plugged into the bottom of a plurality of long rods (71), the descaling assembly (8) further comprising a fixing plate (82) fixedly connected to the bottom of the outer side of the lower cylinder (2), the top of the fixing plate (82) being fixedly connected to an electric telescopic rod (83), the output shaft of the electric telescopic rod (83) passing through the fixing plate (82) being fixedly connected to a piston plate (84), the descaling assembly (8) also includes an air cylinder (85) fixedly connected to the outside of the lower cylinder (2) and located below the fixed plate (82); the outer wall of the piston plate (84) is in contact with the inner wall of the air cylinder (85); the interiors of the movable cover (81) and the long rod (71) are both hollow, and the interiors of the movable cover (81) and the long rod (71) are connected; a hose (86) is fixedly plugged into the bottom of the air cylinder (85); and one end of the hose (86) away from the air cylinder (85) is fixedly plugged into the movable cover (81).

9. A multi-channel heat exchanger according to claim 8, characterized in that: The guide block (74) is provided with an empty slot (15) inside, a rubber membrane (16) is fixedly connected to the outside of the guide block (74), and the empty slot (15) is communicated with the inside of the long rod (71).

10. A multi-channel heat exchanger according to claim 9, characterized in that: A filter assembly (9) is arranged below the baffle plate (5), and the filter assembly (9) comprises a filter cover (91) threadedly connected to the bottom of the heat exchange tube (4), a filter ring (92) is fixedly connected to the bottom of the filter cover (91), a filter hole (93) is provided on the surface of the filter ring (92), a slide groove (94) is provided on the outer wall of the long rod (71) near the filter ring (92), a scraper (95) is fixedly connected to the inner wall of the slide groove (94), and a first spring (96) is fixedly connected between the top of the scraper (95) and the long rod (71).

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