Water-cooling type plate-fin heat exchanger for large equipment

Abstract

The invention relates to the technical field of heat exchangers, and particularly discloses a large equipment water-cooling type plate-fin heat exchanger which comprises a heat exchange box body, heat exchange main pipes are fixedly installed in the heat exchange box body at equal intervals in a linear arrangement mode, and connecting bent pipes are fixedly installed at the tops and the bottoms of the heat exchange main pipes. In the application period of the technical scheme, the cleaning structure with synchronous transmission is arranged, the first motor serves as a single driving source, all the annular cleaning brushes are synchronously driven to rotate to clean the outer surface of the heat exchange main pipe through transmission of a coupler, a lead screw, a sliding block, a gear and the like, and a drainage mechanism is matched for discharging impurities; the problems that in the prior art, the heat exchange efficiency is reduced, the efficiency of a traditional heat exchanger is low and fluid flows through cavities are solved, meanwhile, equipment does not need to be disassembled, cost is saved, and using convenience and stability are improved.

Description

Technical Field

[0001] This invention relates to the field of heat exchanger technology, and in particular to a water-cooled plate-fin heat exchanger for large equipment. Background Technology

[0002] Plate-fin heat exchangers are characterized by their compact structure, high heat transfer coefficient, lightweight design, and strong adaptability. They can meet the needs of simultaneous heat exchange of multiple streams and have good low-temperature performance. In recent years, they have been widely used in cryogenic devices such as air separation and chemical processes. With the continuous improvement of related manufacturing technologies, their application scenarios have been further expanded. For example, during the operation of internal combustion engines, this type of heat exchanger is needed to complete the cooling operation to ensure the long-term stable operation of the internal combustion engine.

[0003] In applications where the cooling medium is a liquid, existing plate-fin heat exchangers and traditional heat exchange equipment still have significant shortcomings. Traditional water-pressurized air heat exchangers, in particular, often employ continuous finned tube structures welded from copper and steel plates. This results in low heat exchange efficiency, large size, heavy weight, and high consumption of non-ferrous metals. Furthermore, weld defects in the brazed structure between the baffles and seals can cause cross-contamination of the heat transfer medium, potentially leading to equipment damage. Despite the publication number CN214095669U, [the following text is incomplete and requires further context: "although the announcement number is CN214095669U"] A Chinese patent discloses a plate-fin heat exchanger that forms an air-side flow channel by encapsulating air-side fins, air-side fin seals, and sealing plates, and forms a water-side flow channel by encapsulating water-side fins, water-side fin seals, and sealing plates. The flow channels are connected to the air collection groove and water collection groove by using air-side slots and water-side slots, respectively. At the same time, the airtightness is improved by seamless welding of two independent channels, the heat exchange efficiency is improved by strengthening the fin surface to reduce the volume, and aluminum components are used to reduce costs. However, for water-cooled plate-fin heat exchangers for large equipment, new technical pain points are still prominent.

[0004] Currently, large-scale water-cooled plate-fin heat exchangers use water as the main cooling medium, relying on water and heat exchange tubes to complete the heat exchange process. However, during long-term heat exchange operations, impurities in the water tend to gradually accumulate on the outer surface of the heat exchange tubes. With the continuous discharge and injection of water, impurities and scale in the water will continuously adhere to and accumulate on the outer surface of the heat exchange tubes. As the equipment operates for longer, the impurities and scale on the outer surface of the heat exchange tubes will increase the actual thickness of the tube wall, creating a contact gap between the heat exchange tubes and the water, ultimately resulting in a significant decrease in overall heat exchange efficiency and a deterioration in heat exchange performance. It is evident that the existing technology still has defects and shortcomings, and therefore, it needs to be improved and designed. Summary of the Invention

[0005] The purpose of this invention is to provide a water-cooled plate-fin heat exchanger for large equipment to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides a water-cooled plate-fin heat exchanger for large equipment, comprising a heat exchange chamber, wherein heat exchange main pipes are fixedly installed in a linear arrangement at equal intervals inside the heat exchange chamber, and connecting bends are fixedly installed at the top and bottom of the heat exchange main pipes. The heat exchange main pipes are connected in series through the heat exchange bends. A heat exchange input pipe is fixedly installed at the top of the heat exchange main pipe located at the input end, and a heat exchange output pipe is fixedly installed at the top of the heat exchange main pipe located at the output end. A water supply pipe is fixedly installed at the upper end of one side of the heat exchange main pipe. A drainage mechanism is fixedly installed at the bottom of the heat exchange chamber, and a cleaning mechanism is fixedly installed at the top of the heat exchange chamber. The cleaning end of the cleaning mechanism extends into the heat exchange chamber and is sleeved on the outer surface of each heat exchange main pipe.

[0007] The cleaning mechanism includes a concave frame and a cleaning module. The concave frame is fixedly installed in the middle of the top of the heat exchange box. A drive module is fixedly installed on one side of the concave frame. The cleaning module is movably installed inside the heat exchange box. The moving end of the drive module passes through the heat exchange box and is connected to the top of the cleaning module. Each cleaning end of the cleaning module is sleeved on the outer surface of each heat exchange main pipe.

[0008] Furthermore, side frames are fixedly installed on both sides of the heat exchange box, and support legs are fixedly installed at both ends of the bottom of the side frames, with a support base plate fixedly installed at the bottom of the support legs.

[0009] Furthermore, the input end of the water supply pipe, the input end of the heat exchange input pipe, and the output end of the heat exchange output pipe are all fixedly installed with external mounting flanges, and the outer surface corners of the heat exchange box, as well as the outer corners of the side frame and the supporting base plate, are all set to be arc-shaped.

[0010] Furthermore, heat exchange fins are fixedly installed on both sides of the heat exchange box in a linear arrangement with equal spacing. The inner side of the heat exchange fins extends into the interior of the heat exchange box, and the heat exchange fins are made of aluminum fins with high thermal conductivity.

[0011] Furthermore, the drive module includes a vertical rail, which is fixedly installed on one side of a concave frame. A top seat is fixedly installed on the top of the vertical rail, and a first motor is fixedly installed on the top of the top seat. A lead screw is rotatably connected inside the vertical rail, and the top end of the lead screw is connected to the bottom output end of the first motor via a coupling. A slider is threadedly connected to the outer surface of the lead screw, and the slider is slidably connected inside the vertical rail. A side plate is fixedly installed on one side of the slider, and a connecting shaft is fixedly installed at the bottom of the side plate. The end of the connecting shaft passes through the heat exchange box and connects to the top of the cleaning module.

[0012] Furthermore, a sealing gasket is provided at the top center of the heat exchange box where the connecting shaft passes through, and the top view shape of the slider and the cross-sectional shape of the internal cavity of the vertical rail are generally arranged in a convex shape.

[0013] Furthermore, the cleaning module includes a rail frame, a support component, and a cleaning component. The rail frame is fixedly installed in the middle of the heat exchange box. The support component is slidably connected to the inner side of the rail frame, and each end of the support component extends to the outer side of the rail frame. The cleaning components are linearly arranged at equal intervals and fixedly installed at the front and rear ends of the support component.

[0014] Furthermore, the bearing component includes a movable block that is slidably connected to the inside of the rail frame. The top of the movable block is fixedly connected to the bottom of the connecting shaft. Connecting main rods are fixedly installed on both sides of the movable block. Fixed rods are fixedly connected to the front and back of the connecting main rods in a linear arrangement with equal spacing. The cleaning component is fixedly installed on the outer end of the fixed rods.

[0015] Furthermore, the cleaning assembly includes a fixing ring and racks. The fixing ring is fixedly installed on the outer end of the fixing rod and sleeved on the outer surface of each heat exchange main pipe. A sliding ring is rotatably connected to the inner side of the fixing ring. A bevel gear ring is fixedly installed on the top of the sliding ring. A base block is fixedly installed on the top outer end of the fixing rod. A spur gear is rotatably connected to the upper end of the base block near the fixing ring. A bevel gear is fixedly installed on the outer side of the spur gear. The bevel gear and the bevel gear ring mesh with each other. The racks are linearly arranged at equal intervals and fixedly installed on the front and rear sides of the top of the heat exchange box. Each rack meshes with a spur gear. An annular cleaning brush, which is a steel brush, is fixedly installed on the inner side of the sliding ring.

[0016] Furthermore, the drainage mechanism includes a drainage hopper, which is fixedly installed at the bottom of the heat exchange box. A conveying auger is rotatably connected to the bottom of the drainage hopper. A second motor is fixedly installed on one side of the drainage hopper. The output end of the second motor is connected to one end of the conveying auger via a coupling. A discharge valve is fixedly installed below the output end of the drainage hopper. A discharge pipe is fixedly installed at the output end of the discharge valve.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] Firstly, in this invention, during the application of this technical solution, a cleaning structure including a drive module and a cleaning component is set up. The first motor in the drive module serves as a single drive source, which can drive the lead screw to rotate through a coupling. The lead screw drives the slider to move downward, and the slider drives the entire cleaning component to move through a connecting shaft. At the same time, the spur gear meshes with the rack and pinion, and the bevel gear drives the bevel gear ring, so that one drive structure can simultaneously drive all the annular cleaning brushes to rotate around the heat exchange main tube. This achieves simultaneous removal of impurities and scale from the outer surface of all heat exchange main tubes inside the heat exchange box. Combined with the drainage mechanism, impurities are quickly discharged, achieving efficient cleaning and avoiding scale accumulation. This solves the problem in the prior art where impurities and scale adhere to the outer surface of the heat exchange tubes after long-term use in large-scale water-cooled plate-fin heat exchangers, leading to a decrease in heat exchange efficiency and a deterioration in heat exchange performance. It eliminates the need to clean each heat exchange main tube individually, greatly improving cleaning efficiency and ensuring that all heat exchange main tubes are always in effective contact with the cooling water, thus ensuring long-term efficient heat exchange of the equipment.

[0019] Secondly, in this invention, during the application of this technical solution, a cleaning structure and a heat exchange structure with a transmission structure are set up. In the cleaning structure, the first motor acts as a single drive, which drives all the annular cleaning brushes to rotate and clean the outer surface of the heat exchange main tube through the transmission of the lead screw, slider, and gear, thus avoiding scale affecting heat transfer. At the same time, in the heat exchange structure, the heat exchange main tube is reasonably arranged to increase the contact area, and the aluminum heat exchange fins accelerate heat transfer, thereby achieving the effect of improving the overall heat exchange efficiency and reducing the consumption of non-ferrous metals. This solves the problems of low heat exchange efficiency, large size, heavy weight, and high consumption of non-ferrous metals in the existing technology of traditional heat exchangers. The synchronous transmission cleaning capability of the cleaning structure ensures that the heat exchange main tube always maintains a good heat transfer state. It works synergistically with the heat exchange structure to further enhance the heat exchange performance, meet the heat exchange requirements of large equipment, and take into account lightweight and low cost.

[0020] Thirdly, in this invention, during the application of this technical solution, by setting up a cleaning structure with synchronous transmission and a sealing and leak-proof structure, the first motor in the cleaning structure can drive all cleaning components to rotate synchronously and clean the outer surface of the heat exchange main pipe through the multi-transmission structure without disassembling the equipment. At the same time, the independent flow channel and sealing gasket ensure that the fluid flows independently and without leakage, thereby achieving the effect of safe and efficient cleaning and avoiding fluid cross-contamination. Furthermore, the setting of its drive module can drive its rotation while moving up and down, which can better save cleaning costs and achieve rapid cleaning. At the same time, with its drainage mechanism for automatic discharge, it can effectively reduce the overall operating cost and improve the convenience of its application. The synchronous transmission design of the cleaning structure allows the cleaning process to be carried out without damaging the equipment's sealing state. Combined with the sealing and leak-proof structure, it not only ensures the cleaning effect but also avoids fluid leakage during cleaning, significantly improving the stability and safety of equipment use. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the internal structure of the heat exchanger box in this invention;

[0023] Figure 3 This is a schematic diagram of the structure viewed from below in this invention;

[0024] Figure 4 This is a bottom view of the cleaning mechanism in this invention;

[0025] Figure 5 This is a top view of the cleaning mechanism in this invention;

[0026] Figure 6 This is a schematic diagram of the drainage mechanism in this invention;

[0027] Figure 7 This is a schematic diagram of the cleaning component structure in this invention;

[0028] Figure 8 This is a schematic diagram of the drive module structure in this invention;

[0029] Figure 9 This is an enlarged structural diagram of point A in section 3 of the present invention.

[0030] In the diagram: 1. Heat exchanger housing; 2. Main heat exchanger pipe; 3. Connecting bend; 4. Heat exchanger input pipe; 5. Heat exchanger output pipe; 6. Water supply pipe; 7. Drainage mechanism; 71. Drainage hopper; 72. Conveying auger; 73. Second motor; 74. Discharge valve; 75. Discharge pipe; 8. Side frame; 9. Cleaning mechanism; 91. Concave frame; 92. Cleaning module; 921. Rail frame; 922. Bearing component; 9221. Movable block; 9222. Connecting main rod; 9223. Fixed rod; 923. Cleaning component; 9231. Fixing ring; 9232. Rack; 9233. Slip ring; 9234. Bevel gear ring; 9235. Base block; 9236. Spur gear; 9237. Bevel gear; 9237. Annular cleaning brush; 93. Drive module; 931. Vertical rail; 932. Top seat; 933. First motor; 934. Lead screw; 935. Slider; 936. Side plate; 937. Connecting shaft; 10. Support leg; 11. Support base plate; 12. Heat exchange fins. Detailed Implementation

[0031] Example

[0032] Please see Figures 1-8In this embodiment of the invention, a large-scale equipment water-cooled plate-fin heat exchanger includes a heat exchange box 1. Heat exchange main pipes 2 are fixedly installed in a linear arrangement at equal intervals inside the heat exchange box 1. Connecting bends 3 are fixedly installed at the top and bottom of the heat exchange main pipes 2. The heat exchange main pipes 2 are connected in series through the heat exchange bends. A heat exchange input pipe 4 is fixedly installed at the top of the heat exchange main pipe 2 at the input end, and a heat exchange output pipe 5 is fixedly installed at the top of the heat exchange main pipe 2 at the output end. A water supply pipe 6 is fixedly installed at the upper end of one side of the heat exchange main pipe 2. A drainage mechanism 7 is fixedly installed at the bottom of the heat exchange box 1. A cleaning mechanism 9 is fixedly installed at the top of the heat exchange box 1. The cleaning end of the cleaning mechanism 9 extends into the heat exchange box 1 and is sleeved on the outer surface of each heat exchange main pipe 2. The connecting bends 3 are located on the outer side of the top and bottom of the heat exchange box 1 and are not located inside the heat exchange box 1.

[0033] The cleaning mechanism 9 includes a concave frame 91 and a cleaning module 92. The concave frame 91 is fixedly installed in the middle of the top of the heat exchange box 1. A drive module 93 is fixedly installed on one side of the concave frame. The cleaning module 92 is movably installed inside the heat exchange box 1. The moving end of the drive module 93 passes through the heat exchange box 1 and connects to the top of the cleaning module 92. Each cleaning end of the cleaning module 92 is sleeved on the outer surface of each heat exchange main pipe 2. During the application of this device, it utilizes the linearly arranged heat exchange main pipes 2 at equal intervals inside the heat exchange box 1. The system includes connecting bends 3, heat exchange input pipe 4, heat exchange output pipe 5, water inlet pipe 6, drainage mechanism 7, and cleaning mechanism 9. During use, cooling medium is first injected into the heat exchange chamber 1 through the water inlet pipe 6. The heat exchange fluid then enters the main heat exchange pipe 2 at the input end through the heat exchange input pipe 4, and flows in series between the main heat exchange pipes 2 through the connecting bends 3, finally exiting from the heat exchange output pipe 5 at the output end. During this process, the heat exchange fluid exchanges heat with the cooling medium inside the heat exchange chamber 1, achieving cooling or... To meet the heating requirements, the connecting elbow 3 is located on the top and bottom outer sides of the heat exchange chamber 1. This ensures smooth communication between the heat exchange main pipes 2 without occupying the internal space of the heat exchange chamber 1. When it is necessary to clean the outer surface of the heat exchange main pipe 2, the cleaning mechanism 9 is activated. The drive module 93 in the cleaning mechanism 9 operates, and its moving end drives the cleaning module 92 inside the heat exchange chamber 1. Since each cleaning end of the cleaning module 92 is fitted onto the outer surface of each heat exchange main pipe 2, the cleaning module 92 can clean the outer surface of the heat exchange main pipe 2 when it operates, removing attached impurities or scale, and ensuring the heat exchange efficiency of the heat exchange main pipe 2. Impurities generated during the cleaning process can be discharged through the drainage mechanism 7 at the bottom of the heat exchange chamber 1, preventing impurities from accumulating inside the heat exchange chamber 1 and affecting the heat exchange effect. The entire process can be completed without disassembling the device to clean the heat exchange main pipe 2. At the same time, the external setting of the connecting elbow 3 reduces the occupation of the heat exchange space by the internal structure, further improving the heat exchange efficiency inside the heat exchange chamber 1 and ensuring that the device can stably perform its heat exchange function during long-term use.

[0034] Please see Figures 1-3Side frames 8 are fixedly installed on both sides of the heat exchanger body 1. Support legs 10 are fixedly installed at both ends of the bottom of the side frames 8. Support base plates 11 are fixedly installed at the bottom of the support legs 10. External mounting flanges are fixedly installed at the inlet end of the water supply pipe 6, the inlet end of the heat exchanger inlet pipe 4, and the outlet end of the heat exchanger outlet pipe 5. The outer edges of the heat exchanger body 1, as well as the outer edges of the side frames 8 and the support base plates 11, are all rounded. Heat exchange fins 12 are fixedly installed on both sides of the heat exchanger body 1 in a linear arrangement at equal intervals. The inner side of the heat exchange fin 12 extends into the interior of the heat exchange box 1. The heat exchange fin 12 is made of aluminum fins with high thermal conductivity. During the application of this device, by setting up the side frame 8, support legs 10, support base plate 11, external mounting flange, rounded corners, and aluminum heat exchange fins 12, the device can be stably placed in the designated working position by first using the support legs 10 and support base plate 11 at both ends of the bottom of the side frame 8, avoiding shaking or displacement during operation. Then, water is input through the water inlet pipe 6 and heat exchange inlet pipe 4. The external mounting flange at the output end of the heat exchange output pipe 5 allows for quick connection to the corresponding external pipeline without additional adjustments, achieving a stable connection and reducing pipeline connection time. During heat exchange, the aluminum heat exchange fins 12 on both sides of the heat exchange box 1 function effectively. Since the inner side of the heat exchange fins 12 extends into the heat exchange box 1 and is made of a high thermal conductivity material, it can quickly transfer the heat absorbed by the cooling medium inside the heat exchange box 1 to the outside, accelerating heat dissipation and thus improving the heat exchange efficiency of the entire device. This ensures that the temperature of the fluid to be heat exchanged can efficiently reach the expected requirements. At the same time, the outer surface corners of the heat exchange box 1, as well as the outer corners of the side frame 8 and the support base plate 11, are all rounded. This prevents personnel from being injured by collisions with sharp corners during installation, use, and maintenance, and also prevents damage caused by contact between the corners and surrounding objects, extending the overall service life of the device. Throughout the process, each structure performs its function and cooperates with each other, ensuring stable operation and efficient heat exchange while improving safety and ease of operation.

[0035] Please see Figures 1-5 and Figures 7-8The drive module 93 includes a vertical rail 931, which is fixedly installed on one side of a concave frame 91. A top seat 932 is fixedly installed on the top of the vertical rail 931, and a first motor 933 is fixedly installed on the top of the top seat 932. A lead screw 934 is rotatably connected inside the vertical rail 931. The top end of the lead screw 934 is connected to the bottom output end of the first motor 933 via a coupling. A slider 935 is threaded onto the outer surface of the lead screw 934 and is slidably connected inside the vertical rail 931. A side plate 936 is fixedly installed on one side of the slider 935, and a connecting shaft 937 is fixedly installed on the bottom of the side plate 936. The end of the connecting shaft 937 passes through the heat exchange box 1 and connects to the top of the cleaning module 92. A sealing gasket is provided at the middle of the top of the heat exchange box 1 where the connecting shaft 937 passes through. The top view shape of the slider 935 and the cross-sectional shape of the internal cavity of the vertical rail 931 are generally arranged in a convex shape. During the application of this device, by setting up the vertical rail 931, top seat 932, first motor 933, lead screw 934, slider 935, side plate 936, connecting shaft 937 and sealing gasket of the drive module 93, it is possible to start the first motor 935 on the top of the top seat 932 first when it is necessary to drive the cleaning module 92. 33. After the first motor 933 starts running, its bottom output end drives the lead screw 934 inside the vertical rail 931 to rotate via a coupling. Since the slider 935, threaded to the outer surface of the lead screw 934, is slidably connected to the inside of the vertical rail 931, and the top view shape of the slider 935 and the cross-sectional shape of the internal cavity of the vertical rail 931 are both convex, the rotation of the lead screw 934 will drive the slider 935 to slide stably along the inside of the vertical rail 931, preventing the slider 935 from deviating or jamming during sliding. Simultaneously, the sliding of the slider 935 will drive the side plate 936 to move synchronously, and the connecting shaft 937 at the bottom of the side plate 936 will move accordingly, connecting... The end of shaft 937 passes through the heat exchange box 1 and connects to the top of cleaning module 92, thereby driving cleaning module 92 to complete the corresponding action and meet the cleaning requirements of the device for the heat exchange main pipe 2. At the same time, a sealing gasket is provided at the through-hole of shaft 937 at the top of heat exchange box 1, which can effectively prevent the cooling medium in heat exchange box 1 from leaking from the through-hole, ensuring the sealing performance of the device and avoiding the impact of medium leakage on heat exchange efficiency or equipment failure. Throughout the process, the various structures work together to achieve stable driving of cleaning module 92 and ensure the sealing reliability of the device, thereby improving the stability and practicality of device operation.

[0036] Please see Figures 4-9The cleaning module 92 includes a rail frame 921, a support assembly 922, and a cleaning assembly 923. The rail frame 921 is fixedly installed in the middle of the heat exchange box 1. The support assembly 922 is slidably connected to the inner side of the rail frame 921, and each end of the support assembly 922 extends to the outer side of the rail frame 921. The cleaning assemblies 923 are linearly arranged at equal intervals and fixedly installed at the front and rear ends of the support assembly 922. The support assembly 922 includes a movable block 9221, which is slidably connected to the inside of the rail frame 921. The top of the movable block 9221 is fixedly connected to the bottom end of the connecting shaft 937. Connecting main rods 9222 are fixedly installed on both sides of the movable block 9221. Fixed rods 9223 are linearly arranged at equal intervals on the front and back sides of the connecting main rods 9222. The cleaning component 923 is fixedly installed on the outer end of the fixing rod 9223. The cleaning component 923 includes a fixing ring 9231 and a rack 9232. The fixing ring 9231 is fixedly installed on the outer end of the fixing rod 9223 and is sleeved on the outer surface of each heat exchange main pipe 2. A sliding ring 9233 is rotatably connected to the inner side of the fixing ring 9231. A bevel gear ring 9234 is fixedly installed on the top of the sliding ring 9233. A base block 9235 is fixedly installed on the top outer end of the fixing rod 9223. A spur gear 9236 is rotatably connected to the upper end of the base block 9235 near the fixing ring 9231. A bevel gear 9237 is fixedly installed on the outer side of the spur gear 9236. The bevel gear 9237 and the bevel gear ring 9234 are meshed. The rack 9232 is linearly spaced at equal intervals. The cleaning modules 9232 and 9236 are fixedly installed on the top front and rear sides of the heat exchanger body 1. Each rack 9232 and spur gear 9236 meshes with each other. A ring-shaped cleaning brush 9237 (made of steel) is fixedly installed on the inner side of the slip ring 9233. The drainage mechanism 7 includes a drainage hopper 71, which is fixedly installed at the bottom of the heat exchanger body 1. A conveying auger 72 is rotatably connected to the bottom of the drainage hopper 71. A second motor 73 is fixedly installed on one side of the drainage hopper 71, and its output end is connected to one end of the conveying auger 72 via a coupling. A discharge valve 74 is fixedly installed below the output end of the drainage hopper 71, and a discharge pipe 75 is fixedly installed at the output end of the discharge valve 74. During operation, the cleaning module 92 is connected to the cleaning module 92 via a track 921 and a bearing. The carrier assembly 922, cleaning assembly 923, and drainage mechanism 7 (including drainage hopper 71, conveying auger 72, second motor 73, discharge valve 74, and discharge pipe 75) ensure that when the outer surface of the heat exchange main pipe 2 needs cleaning, the movable block 9221 of the carrier assembly 922 slides along the inner side of the rail frame 921 under the drive of the connecting shaft 937. The connecting main rods 9222 on both sides of the movable block 9221 move accordingly. The fixing rods 9223 on the front and back of the connecting main rods 9222 drive the cleaning assembly 923 at the end to move synchronously. In the cleaning assembly 923, the fixing ring 9231 is fitted onto the outer surface of the heat exchange main pipe 2. As the fixing rod 9223 moves, the spur gear 9236 on the base block 9235 meshes with the racks 9232 on the front and rear sides of the top of the heat exchange box 1.With rack 9232 stationary, spur gear 9236 rotates. The bevel gear 9237 outside spur gear 9236 drives the bevel ring 9234 at the top of slip ring 9233 to rotate. Slip ring 9233 then rotates around the inner side of fixed ring 9231. The annular cleaning brush 9237 inside slip ring 9233 rotates synchronously, wiping and cleaning the outer surface of heat exchange main pipe 2 to remove attached impurities or scale. The impurities generated during cleaning fall into the drain hopper 71 at the bottom of heat exchange chamber 1. At this time, the second electric current of the drain mechanism 7 is activated. The output of the second motor 73 drives the conveying auger 72 at the bottom of the drainage hopper 71 to rotate via a coupling. The conveying auger 72 pushes the mixture of impurities and cooling medium towards the discharge valve 74. After the discharge valve 74 is opened, the mixture is discharged outside the device through the discharge pipe 75, preventing impurities from accumulating and affecting heat exchange. Throughout the process, all structures work together to effectively clean the outer surface of the heat exchange main pipe 2 and promptly discharge impurities, ensuring stable heat exchange efficiency and improving the practicality and ease of maintenance of the device.

[0037] The working principle of this invention is as follows: When using this technical solution, heat exchange preparation and basic heat exchange procedures are first carried out. Sufficient cooling water is injected into the heat exchange tank 1 through the water inlet pipe 6. Then, the fluid to be heat-exchanged is connected to the heat exchange inlet pipe 4 via an external mounting flange. Simultaneously, the heat exchange outlet pipe 5 is connected to the subsequent processing pipeline through the external mounting flange. The external mounting flange facilitates easier connection between the equipment and external pipelines. After starting the equipment, the fluid to be heat-exchanged enters the first heat exchange main pipe 2 through the heat exchange inlet pipe 4. Under the series action of the connecting bend pipe 3, it flows sequentially through multiple heat exchange main pipes 2, forming a continuous flow path. The setting of the connecting bend pipe 3 ensures that the fluid to be heat-exchanged can flow smoothly between multiple heat exchange main pipes 2. The heat of the fluid to be heat-exchanged is transferred through the heat exchange pipe. The heat transfer pipe 2 transfers heat to the outer cooling water. After absorbing heat, the cooling water's temperature rises. At this time, the aluminum heat exchange fins 12 on both sides of the heat exchange box 1 quickly transfer heat to the outside air, thus cooling the cooling water and enabling it to continuously absorb heat. The heat exchanged fluid is finally discharged through the heat exchange output pipe 5, forming a basic heat exchange cycle. During this process, the side frame 8, support legs 10, and support base plate 11 work together to maintain the stability of the equipment and prevent shaking during operation. The sealing gasket prevents cooling water from leaking through the connecting shaft 937, ensuring the airtightness of the heat exchange environment. The rounded corners of the heat exchange box 1, side frame 8, and support base plate 11 prevent the equipment from colliding with and being damaged by surrounding objects, extending the service life of the equipment.

[0038] When the equipment has been running for a long time and a lot of impurities and scale have accumulated on the outer surface of the heat exchange main pipe 2, the cleaning mechanism 9 is activated to remove the scale. The first motor 933 is powered on and runs. Its output end drives the lead screw 934 inside the vertical rail 931 to rotate through the coupling. The slider 935 on the outer surface of the lead screw 934 slides vertically downward along the internal cavity of the vertical rail 931 under the action of the thread force and the limiting action of the vertical rail 931. The convex structure of the slider 935 matches the cavity of the vertical rail 931, making the sliding process smoother. The slider 935 drives the connecting shaft 937 to move down synchronously through the side plate 936. After the connecting shaft 937 passes through the sealing gasket, it pushes the movable block 9221 in the cleaning module 92 to slide along the inner side of the rail frame 921. The movable block 9221 drives the connecting main rods 9222 on both sides to move down. The fixed rods 9223 on the front and back of the connecting main rods 9222 move accordingly, thereby driving the fixed rods 9223 to move down. The cleaning component 923 at the outer end of 223 moves downward along the length of the heat exchange main pipe 2. During the downward movement of the cleaning component 923, the spur gear 9236 on the base block 9235 at the top of the fixed rod 9223 continuously meshes with the racks 9232 on the front and rear sides of the top of the heat exchange box 1. Since the racks 9232 are fixed, the spur gear 9236 rotates around its own axis. The bevel gear 9237 on the outer side of the spur gear 9236 rotates synchronously. The bevel gear 9237 meshes with the bevel ring 9234 at the top of the slip ring 9233, causing the slip ring 9233 to rotate around the inner side of the fixed ring 9231. The annular cleaning brush 9237 on the inner side of the slip ring 9233 rotates accordingly, wiping and peeling off the impurities and scale on the outer surface of the heat exchange main pipe 2 in all directions. The annular cleaning brush 9237 is made of steel brush material, which can better and more powerfully brush the outer surface of the heat exchange main pipe 2, ensuring that the scale is removed more thoroughly.

[0039] After the impurities are removed, they fall naturally with the cooling water and collect in the drain hopper 71 at the bottom of the heat exchange box 1. At this time, the drainage mechanism 7 is activated to discharge the impurities. The second motor 73 is powered on and runs. Its output end drives the conveying auger 72 at the bottom of the drain hopper 71 to rotate through the coupling. The conveying auger 72 pushes the mixture of cooling water and impurities in the drain hopper 71 toward the discharge valve 74. After the discharge valve 74 is opened, the mixture is discharged outside the equipment through the discharge pipe 75 to avoid the accumulation of impurities in the box and affect the heat exchange. After the impurities are discharged, the first motor 933 is controlled to reverse. The first motor 933 drives the lead screw 934 to rotate in the opposite direction. The slider 935 slides upward along the vertical rail 931. Through the connecting shaft 937 and the movable block 9221, the cleaning module 92 is reset to the initial position. If a lot of scale is found on the surface of the heat exchange main pipe 2, the cleaning mechanism 9 can be activated periodically according to the actual situation to keep the surface of the heat exchange main pipe 2 clean and ensure stable heat exchange efficiency.

[0040] This technical solution increases the contact area with cooling water by arranging the heat exchange main pipes 2 at equal intervals. Combined with highly thermally conductive aluminum heat exchange fins 12, it accelerates heat transfer and improves overall heat exchange efficiency. Furthermore, the use of aluminum instead of traditional copper reduces non-ferrous metal consumption, solving the problems of low heat exchange efficiency, large size, and heavy weight inherent in traditional heat exchangers. The flow channels for the fluid to be exchanged and the cooling water flow channels are independent, eliminating the need for complex brazing sealing structures. The sealing gaskets effectively prevent cooling water leakage, structurally avoiding the problem of medium cross-contamination caused by weld defects in traditional heat exchangers. The cleaning mechanism includes a 9-way channel. Through the coordinated operation of multiple structures including the first motor 933, lead screw 934, slider 935, spur gear 9236, and bevel gear 9237, the system achieves automated scale removal. The drainage mechanism 7, with the help of the second motor 73, conveying auger 72, and discharge valve 74, quickly discharges impurities, preventing scale accumulation from causing the heat exchange main pipe 2 to thicken and form a contact gap with the water. This solves the problem of decreased heat exchange efficiency in large water-cooled plate-fin heat exchangers after long-term use. At the same time, it continues the advantages of independent flow channels and aluminum components in existing patents, further improving equipment performance and ensuring stable operation of the equipment during long-term use.

Claims

1. A water-cooled plate-fin heat exchanger for large equipment, characterized in that, The heat exchange box (1) includes a heat exchange main pipe (2) which is fixedly installed in a linear arrangement at equal intervals inside the heat exchange box (1). Connecting bends (3) are fixedly installed at the top and bottom of the heat exchange main pipe (2). A heat exchange input pipe (4) is fixedly installed at the top of the heat exchange main pipe (2) at the input end. A heat exchange output pipe (5) is fixedly installed at the top of the heat exchange main pipe (2) at the output end. A water supply pipe (6) is fixedly installed at the upper end of one side of the heat exchange main pipe (2). A drainage mechanism (7) is fixedly installed at the bottom of the heat exchange box (1). A cleaning mechanism (9) is fixedly installed at the top of the heat exchange box (1). The cleaning mechanism (9) includes a concave frame (91) and a cleaning module (92). The concave frame (91) is fixedly installed in the middle of the top of the heat exchange box (1). A drive module (93) is fixedly installed on one side of the concave frame. The cleaning module (92) is movably installed inside the heat exchange box (1).

2. A water-cooled plate-fin heat exchanger for large equipment according to claim 1, characterized in that, Side frames (8) are fixedly installed on both sides of the heat exchange box (1), and support legs (10) are fixedly installed at both ends of the bottom of the side frames (8), and support base plates (11) are fixedly installed at the bottom of the support legs (10).

3. A water-cooled plate-fin heat exchanger for large equipment according to claim 2, characterized in that, The input end of the water supply pipe (6), the input end of the heat exchange input pipe (4) and the output end of the heat exchange output pipe (5) are all fixedly installed with external mounting flanges. The outer surface corners of the heat exchange box (1) and the outer corners of the side frame (8) and the support base plate (11) are all set as arc shapes.

4. A water-cooled plate-fin heat exchanger for large equipment according to claim 1, characterized in that, The heat exchange box (1) has heat exchange fins (12) fixedly installed on both sides in a linear arrangement with equal spacing. The inner side of the heat exchange fins (12) extends into the interior of the heat exchange box (1). The heat exchange fins (12) are made of aluminum fins with high thermal conductivity.

5. A water-cooled plate-fin heat exchanger for large equipment according to claim 1, characterized in that, The drive module (93) includes a vertical rail (931), which is fixedly installed on one side inside the concave frame (91). A top seat (932) is fixedly installed on the top of the vertical rail (931), and a first motor (933) is fixedly installed on the top of the top seat (932). A lead screw (934) is rotatably connected inside the vertical rail (931). The top end of the lead screw (934) is connected to the bottom output end of the first motor (933) through a coupling. A slider (935) is threadedly connected to the outer surface of the lead screw (934). The slider (935) is slidably connected inside the vertical rail (931). A side plate (936) is fixedly installed on one side of the slider (935). A connecting shaft (937) is fixedly installed at the bottom of the side plate (936). The end of the connecting shaft (937) passes through the heat exchange box (1) and is connected to the top of the cleaning module (92).

6. A water-cooled plate-fin heat exchanger for large equipment according to claim 5, characterized in that, A sealing gasket is provided at the top center of the heat exchange box (1) through the connecting shaft (937), and the top view shape of the slider (935) and the cross-sectional shape of the internal cavity of the vertical rail (931) are arranged in a convex shape.

7. A water-cooled plate-fin heat exchanger for large equipment according to claim 5, characterized in that, The cleaning module (92) includes a rail frame (921), a support component (922), and a cleaning component (923). The rail frame (921) is fixedly installed in the middle of the heat exchange box (1). The support component (922) is slidably connected to the inner side of the rail frame (921). Each end of the support component (922) extends to the outer side of the rail frame (921). The cleaning components (923) are linearly arranged at equal intervals and fixedly installed at the front and rear ends of the support component (922).

8. A water-cooled plate-fin heat exchanger for large equipment according to claim 7, characterized in that, The bearing component (922) includes a movable block (9221), which is slidably connected to the inside of the rail frame (921). The top of the movable block (9221) is fixedly connected to the bottom of the connecting shaft (937). Connecting main rods (9222) are fixedly installed on both sides of the movable block (9221). Fixed rods (9223) are fixedly connected to the front and back of the connecting main rods (9222) in a linear arrangement with equal spacing. The cleaning component (923) is fixedly installed on the outer end of the fixed rods (9223).

9. A water-cooled plate-fin heat exchanger for large equipment according to claim 8, characterized in that, The cleaning assembly (923) includes a retaining ring (9231) and a rack (9232). The retaining ring (9231) is fixedly installed on the outer end of the fixing rod (9223). The retaining ring (9231) is sleeved on the outer surface of each heat exchange main tube (2). A sliding ring (9233) is rotatably connected to the inner side of the retaining ring (9231). A beveled ring (9234) is fixedly installed on the top of the sliding ring (9233). A base block (9235) is fixedly installed on the outer top end of the fixing rod (9223). The base block (9235) is close to the retaining ring (9232). A spur gear (9236) is rotatably connected to the upper end of one side of the heat exchange box (1). A bevel gear (9237) is fixedly installed on the outer side of the spur gear (9236). The bevel gear (9237) and the bevel ring (9234) are meshed together. The racks (9232) are linearly arranged at equal intervals and fixedly installed on the front and rear sides of the top of the heat exchange box (1). Each rack (9232) is meshed with the spur gear (9236). An annular cleaning brush (9237) is fixedly installed on the inner side of the slip ring (9233). The annular cleaning brush (9237) is a steel brush.

10. A water-cooled plate-fin heat exchanger for large equipment according to claim 9, characterized in that, The drainage mechanism (7) includes a drainage bucket (71), which is fixedly installed at the bottom of the heat exchange box (1). A conveying auger (72) is rotatably connected to the bottom of the drainage bucket (71). A second motor (73) is fixedly installed on one side of the drainage bucket (71). The output end of the second motor (73) is connected to one end of the conveying auger (72) through a coupling. A discharge valve (74) is fixedly installed on the lower side of the output end of the drainage bucket (71). A discharge pipe (75) is fixedly installed on the output end of the discharge valve (74).

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