High-strength sheet-type structure heat sink

Abstract

The present application belongs to the technical field of transformer heat dissipation, and particularly relates to a high-strength sheet structure radiator. In a high-humidity or rain climate environment, the motor control shunt pipe and the current collecting pipe drive the heat dissipation fins to rotate to be perpendicular to the transformer, so as to reduce the air flow through the heat dissipation fins. In a high-humidity environment, the risk of moisture is reduced in priority, and meanwhile, the rain baffle completely covers above all the heat dissipation fins, so as to avoid that a large amount of external water vapor is attached to the heat dissipation fins. The outer surface of the heat dissipation fins is further coated with a PTFE coating, so as to consider heat dissipation and corrosion resistance within an acceptable range. The technical problem that the heat dissipation fins of the oil-immersed transformer radiator are easily corroded by water vapor and pollutants in the surrounding environment, and the structural strength is affected, is solved.

Description

Technical Field

[0001] This invention belongs to the field of transformer heat dissipation technology, specifically relating to a high-strength plate-type heat sink. Background Technology

[0002] The working principle of the radiator of an oil-immersed transformer is achieved through the natural convection circulation of oil. When the transformer is running, the heat generated by the core and windings is absorbed by the surrounding insulating heat-conducting oil. The hot oil has a lower density and rises, while the cold oil has a higher density and sinks. A natural convection circulation is formed in the closed oil circuit system between the transformer and the radiator fins. The radiator increases the surface area through the heat dissipation fins and uses air convection and thermal radiation to quickly release the heat carried by the heat-conducting oil into the surrounding environment, thereby keeping the transformer within a safe operating temperature range.

[0003] In climates with high humidity and frequent rainfall, radiator fins are typically made of metal. Moisture, salt spray, or acidic pollutants in high-humidity environments can chemically react with the metal surface of the fins, leading to corrosion such as oxidation or salt erosion. This corrosion not only weakens the metal structure of the fins but also forms an insulating layer or corrosion products on the fin surface, significantly reducing heat dissipation efficiency. In severe cases, it can even damage the radiator structure, endangering the safe operation of the transformer. Maintenance personnel must regularly clean, apply anti-corrosion agents, or replace components. However, frequent maintenance requires significant manpower and resources, and often necessitates shutdowns or high-voltage tests, causing power system instability and additional operating costs, severely impacting the efficiency and reliability of the power grid. Summary of the Invention

[0004] To overcome the drawback that the heat dissipation fins of oil-immersed transformers are easily corroded by moisture and pollutants in the surrounding environment under high humidity and frequent rainfall conditions, thus affecting their structural strength, this invention provides a high-strength plate-type heat dissipation fin.

[0005] This invention discloses a high-strength plate-type heat sink, comprising a transformer, outflow pipes, return pipes, branch pipes, collector pipes, a fixing frame, side baffles, heat dissipation fins, adjusting gears, a motor, a drive gear, and a rain shield. At least two outflow pipes are connected to the left and right sides of the transformer. A return pipe, corresponding in number and position to the outflow pipes, is connected to the transformer and is located below the corresponding outflow pipe. A branch pipe is rotatably connected to each outflow pipe, with the outflow pipe connected to the middle of the branch pipe and connected to the corresponding outflow pipe. A collector pipe is rotatably connected to the return pipe, with the return pipe connected to the collector pipe. In the middle, the current collector is connected to the corresponding return pipe; a fixed frame is fixed between the current distributor and the corresponding current collector; a side baffle is fixed to the left and right sides of the fixed frame; several heat dissipation fins are fixed inside the fixed frame, and the heat dissipation fins are parallel to the corresponding side of the transformer; the outer surface of the heat dissipation fins is coated with a layer of PTFE coating; the heat dissipation fins are respectively connected to the corresponding current distributor and current collector; an adjusting gear is fixed to the middle of the current distributor; a motor is installed on the outlet pipe; a drive gear is fixed to the output shaft of the motor; the drive gear meshes with the corresponding adjusting gear; a rain shield is fixed to the outlet pipe.

[0006] Preferably, a first main sealing ring is fixedly connected to the side of the outflow pipe that is connected to the corresponding branch pipe; a second main sealing ring is fixedly connected to the side of the return pipe that is connected to the corresponding collector pipe.

[0007] Preferably, a first auxiliary sealing ring is fixedly connected to the diverter pipe and closely adheres to the corresponding first main sealing ring; a second auxiliary sealing ring is fixedly connected to the manifold pipe and closely adheres to the corresponding second main sealing ring.

[0008] Preferably, the front and rear sides of the rain shield are longer than its left and right sides; the left and right sides of the fixing frame are longer than its front and rear sides; and the front and rear sides of the rain shield are longer than the left and right sides of the fixing frame.

[0009] Preferably, a cooling fan is installed on the return pipe; a gas dryer is installed at the bottom of the transformer; and a gas supply pipe is fixedly connected between the air inlet of the cooling fan and the air outlet of the gas dryer.

[0010] Preferably, an environmental monitoring instrument is installed on the outflow pipe to monitor the humidity and temperature environment of the heat dissipation fins below.

[0011] Preferably, the heat dissipation fins are designed as a corrugated, earthquake-resistant structure with a small angle of inclination.

[0012] Preferably, the first main sealing ring, the second main sealing ring, the first auxiliary sealing ring, and the second auxiliary sealing ring are made of elastic shock-absorbing rubber material.

[0013] Preferably, a sliding rod is fixedly connected to the rain shield, and the rain shield is slidably connected to the corresponding outflow pipe through the sliding rod.

[0014] Preferably, a drain pipe is connected to the bottom of the gas supply pipe; a sealing plug is inserted into the drain pipe.

[0015] This invention discloses a high-strength plate-type heat sink. A rotatable branch pipe and a collector pipe are provided between the outflow pipe and the return pipe. Heat dissipation fins are connected between the branch pipe and the collector pipe. Under normal conditions, heat dissipation is achieved by the flow of external air blown between the heat dissipation fins. In high humidity or rainy weather, a motor controls the branch pipe and collector pipe to rotate the heat dissipation fins perpendicular to the transformer, reducing the airflow between the fins. In high humidity environments, this prioritizes reducing the risk of moisture absorption. Simultaneously, a rain shield completely covers all heat dissipation fins, preventing excessive external moisture from adhering to them. The outer surface of the heat sink fins is also coated with a layer of PTFE (polytetrafluoroethylene) coating, which balances heat dissipation and corrosion protection within an acceptable range. This solves the technical problem that the heat sink fins of oil-immersed transformers are easily corroded by water vapor and pollutants in the surrounding environment in high humidity and frequent rainfall climates, affecting their structural strength. It is also equipped with a first main sealing ring, a second main sealing ring, a first secondary sealing ring, and a second secondary sealing ring. Together with the corrugated anti-vibration structure with a small angle of inclination on the heat sink fins, they provide a buffering effect against vibration and impact, and enhance the anti-vibration structural strength of the heat sink fins. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the outflow tube of the present invention; Figure 3 This is a three-dimensional structural diagram of the fixed frame of the present invention; Figure 4 This is a three-dimensional structural diagram of the diversion tube of the present invention; Figure 5 This is a three-dimensional structural diagram of the manifold of the present invention; Figure 6 This is a three-dimensional structural diagram of the rain shield of the present invention.

[0017] Reference numerals: 1. Transformer, 21. Outflow pipe, 211. First main sealing ring, 22. Return pipe, 221. Second main sealing ring, 23. Diverter pipe, 231. First auxiliary sealing ring, 24. Collector pipe, 241. Second auxiliary sealing ring, 25. Fixing frame, 251. Side baffle, 26. Heat dissipation fins, 27. Adjusting gear, 28. Motor, 29. Drive gear, 3. Rain shield, 31. Slide rod, 41. Cooling fan, 42. Gas dryer, 43. Gas delivery pipe, 431. Drain pipe, 432. Sealing plug, 5. Environmental monitoring instrument. Detailed Implementation

[0018] 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.

[0019] Example 1: This invention relates to a high-strength plate-type heat sink, such as... Figures 1-6 As shown, the system includes a transformer 1, an outflow pipe 21, a return pipe 22, a branch pipe 23, a collector pipe 24, a fixed frame 25, a side baffle 251, heat dissipation fins 26, an adjusting gear 27, a motor 28, a drive gear 29, a rain shield 3, a cooling fan 41, a gas dryer 42, a gas transmission pipe 43, and an environmental monitoring instrument 5. Two outflow pipes 21 are connected to the left and right sides of the transformer 1. Return pipes 22, corresponding in number and position to the outflow pipes 21, are connected to the transformer 1, and the return pipes 22 are located at the corresponding flow... Below the outlet pipe 21; each outlet pipe 21 is rotatably connected to a branch pipe 23, the outlet pipe 21 is connected to the middle of the branch pipe 23, and the branch pipe 23 is connected to the corresponding outlet pipe 21; each return pipe 22 is rotatably connected to a collector pipe 24, the return pipe 22 is connected to the middle of the collector pipe 24, and the collector pipe 24 is connected to the corresponding return pipe 22; a fixing frame 25 is fixedly connected between each branch pipe 23 and the corresponding collector pipe 24; a side baffle is fixedly connected to the left and right sides of each fixing frame 25. 251; Each fixed frame 25 has several heat dissipation fins 26 fixedly connected to it, and the heat dissipation fins 26 are initially parallel to the right side of the transformer 1; the outer surface of each heat dissipation fin 26 is coated with a layer of PTFE coating, which balances heat dissipation and corrosion protection within an acceptable range; the upper side of each heat dissipation fin 26 is connected to a corresponding shunt pipe 23; the lower side of each heat dissipation fin 26 is connected to a corresponding collector pipe 24; an adjusting gear 27 is fixedly connected to the middle of each shunt pipe 23; each outlet pipe 21 is equipped with a... A motor 28; each output shaft of the motor 28 is fixedly connected to a drive gear 29; each drive gear 29 meshes with a corresponding adjusting gear 27; each outflow pipe 21 is fixedly connected to a rain shield 3; each return pipe 22 is equipped with a cooling fan 41; a gas dryer 42 is installed at the bottom of the transformer 1; a gas supply pipe 43 is fixedly connected between the air inlet of each cooling fan 41 and the air outlet of the gas dryer 42; each outflow pipe 21 is equipped with an environmental monitoring instrument 5.

[0020] like Figures 3-5As shown, each outflow pipe 21 is connected to a corresponding branch pipe 23 with a first main sealing ring 211 fixedly attached to one side; each return pipe 22 is connected to a corresponding manifold 24 with a second main sealing ring 221 fixedly attached to one side; each branch pipe 23 is fixedly attached with a first secondary sealing ring 231, which is initially pressed below the corresponding first main sealing ring 211, thereby enhancing the sealing effect between the outflow pipe 21 and the branch pipe 23; each manifold 24 is fixedly attached with a second secondary sealing ring 241, which is initially pressed above the corresponding second main sealing ring 221, thereby enhancing the sealing effect between the return pipe 22 and the manifold 24.

[0021] like Figure 1 As shown, the front and rear sides of the rain shield 3 are longer than its left and right sides; the left and right sides of the fixing frame 25 are longer than its front and rear sides; the front and rear sides of the rain shield 3 are longer than the left and right sides of the fixing frame 25. In the initial state, the rain shield 3 cannot completely cover the front and rear sides of the fixing frame 25, allowing the front and rear sides of the fixing frame 25 to contact more of the air above. When the fixing frame 25 is rotated 90 degrees clockwise from a top-down angle, the rain shield 3 will completely cover the top of the fixing frame 25, preventing rainwater from falling into the fixing frame 25 and wetting the heat dissipation fins 26.

[0022] Under normal climatic conditions, the heat dissipation fins 26 inside the fixed frame 25 are parallel to the right side of the transformer 1. The oil flowing inside the transformer 1, affected by temperature, circulates along the outflow pipe 21, the branch pipe 23, the heat dissipation fins 26, the collector pipe 24, and the return pipe 22. The outside air flows continuously between two adjacent heat dissipation fins 26 for air cooling, thereby cooling the oil flowing continuously inside the heat dissipation fins 26 and achieving normal heat dissipation. At this time, the rain shield 3 can act as a sunshade to block the sun radiation on a local area of ​​the heat dissipation fins 26, reducing the solar radiation received by the heat dissipation fins 26.

[0023] When the environmental monitoring instrument 5 detects high ambient humidity, or when encountering rainy weather, the motor 28 drives the drive gear 29 to rotate. The drive gear 29 meshes with the adjusting gear 27, causing the diverter pipe 23 and its connected fixed frame 25, heat dissipation fins 26, and collector pipe 24 to rotate 90 degrees clockwise from a top-view angle. At this time, the heat dissipation fins 26 inside the fixed frame 25 are completely covered by the rain shield 3, and external rainwater is blocked by the rain shield 3 and will not fall onto the heat dissipation fins 26. At this time, the side baffles 251 cover the front and rear sides of the fixed frame 25 respectively. Furthermore, the heat dissipation fins 26 are positioned perpendicular to the left and right sides of the transformer 1, respectively. The external airflow is blocked by the transformer 1, and its flow between the two heat dissipation fins 26 is weakened, reducing the airflow into the heat dissipation fins 26. This prevents a large amount of moisture carried by the outside air from adhering to the heat dissipation fins 26, thus minimizing the risk of moisture absorption in high humidity environments. In addition, the outer surface of the heat dissipation fins 26 is coated with a layer of PTFE coating, thereby improving the water vapor corrosion resistance of the outer surface of the heat dissipation fins 26 and preventing the outer surface of the heat dissipation fins 26 from being eroded by water vapor for a long time.

[0024] When the heat dissipation fins 26 are perpendicular to the left and right sides of the transformer 1, the air cooling effect of the heat dissipation fins 26 is weakened by the airflow. If the environmental monitoring instrument 5 detects that the temperature between the heat dissipation fins 26 is high, the cooling fan 41 will start working. The cooling fan 41 will continuously draw in outside air through the air supply pipe 43 and the gas dryer 42. After the outside air is dried by the gas dryer 42, the water vapor content in the outside air is reduced. The dried air is continuously blown upward along the air supply pipe 43 by the cooling fan 41 and flows between the two heat dissipation fins 26 to perform air cooling treatment on the heat dissipation fins 26, ensuring that the oil flowing inside the heat dissipation fins 26 can be properly cooled.

[0025] Example 2: Based on Example 1, such as Figures 1-6As shown, each heat dissipation fin 26 in this embodiment is designed with a small-angle inclined corrugated anti-vibration structure; each first main sealing ring 211, second main sealing ring 221, first auxiliary sealing ring 231 and second auxiliary sealing ring 241 are made of elastic shock-absorbing rubber material; when the transformer 1 is in a site with frequent strong vibrations, such as a mine, the heat dissipation fins 26 are frequently subjected to strong vibration impacts, which may directly cause the heat dissipation fins 26 to bend, deform or even break. Long-term micro-vibration may also cause the welding points of the heat dissipation fins 26 to loosen or the substrate to develop fatigue cracks. If the geometry and integrity of the heat dissipation fins 26 are damaged, the heat dissipation area will be greatly reduced and the air flow path will be blocked, resulting in a significant decrease in heat dissipation efficiency, further aggravating the overheating risk of the transformer 1, and in severe cases even causing transformer oil leakage; the transformer 1 in this embodiment is subjected to strong external vibrations. Under severe vibration and impact, before the outflow pipe 21 and return pipe 22 transmit the vibration and impact force to the heat dissipation fins 26 in the fixed frame 25, most of the vibration and impact force is absorbed by the first main sealing ring 211 and the first secondary sealing ring 231, and the second main sealing ring 221 and the second secondary sealing ring 241 that are tightly attached together. When the remaining vibration and impact force is transmitted to the heat dissipation fins 26, the corrugated anti-vibration structure on the heat dissipation fins 26 can be compressed or rebounded like a spring. Moreover, the small-angle tilt design of the corrugated anti-vibration structure ensures that the impact force is not concentrated on a single point in the heat dissipation fins 26, but is dispersed along the curve of the corrugations. The folding points between the corrugations act as buffer zones, effectively absorbing the remaining vibration and impact force, greatly reducing the pressure directly acting on the substrate of the heat dissipation fins 26, enhancing the anti-vibration structural strength of the heat dissipation fins 26, and improving the service life of the heat dissipation fins 26.

[0026] Example 3: Based on Example 1, such as Figures 1-6As shown, each rain shield 3 in this embodiment is fixedly connected to two sliding rods 31, and the rain shield 3 is slidably connected to the corresponding outflow pipe 21 through the sliding rods 31; each gas pipe 43 has a drain pipe 431 connected to its bottom; each drain pipe 431 has a sealing plug 432 inserted inside; when the transformer 1 is in an installation environment with poor air quality, the dust that accumulates and covers the surface of the heat dissipation fins 26 for a long time will affect its heat dissipation effect. Therefore, it is necessary for the staff to regularly use a handheld water gun to perform shutdown cleaning and maintenance work on the heat dissipation fins 26. Before cleaning the heat dissipation fins 26, the staff should first... Pulling the rain shield 3 moves the sliding rod 31 outward along the outflow pipe 21, easily removing the rain shield 3 from the outflow pipe 21 and removing the sealing plug 432 from the drain pipe 431. Then, the staff can use a water gun to wash the dust covering the surface of the heat dissipation fins 26 from top to bottom. At this time, the rain shield 3 does not obstruct the washing work, and even if the water flow flows downward through the cooling fan 41 and enters the air supply pipe 43, the water flow can be discharged outward through the drain pipe 431 in time. This not only achieves the cleaning of the cooling fan 41, but also prevents water from accumulating in the drain pipe 431.

[0027] After rinsing and maintenance, use cooling fan 41 to blow air to dry the heat dissipation fins 26. Once the residual moisture is within an acceptable range, the equipment can be put back into operation.

[0028] In this invention, the rainproof and moisture-proof functions achieved by the attitude adjustment of the rain shield 3 and the heat dissipation fins 26 are mainly aimed at the environmental exposure problem during the normal operation of the transformer 1; while the flushing and maintenance operation is a short-term, manually controllable cleaning measure under the condition of equipment shutdown and maintenance. The two are applicable to different working conditions and do not conflict.

[0029] Although this disclosure has been described with respect to only a limited number of embodiments, those skilled in the art who benefit from this disclosure will understand that various other embodiments can be devised without departing from the scope of the invention. Therefore, the scope of the invention should be limited only by the appended claims.

Claims

1. A high-strength plate-type heat sink, comprising a transformer (1); at least two outflow pipes (21) are connected to the left and right sides of the transformer (1); a return pipe (22) corresponding to the number and position of the outflow pipes (21) is connected to the transformer (1), and the return pipe (22) is located below the corresponding outflow pipe (21); characterized in that: It also includes a diversion pipe (23); a diversion pipe (23) is rotatably connected to the outflow pipe (21), the outflow pipe (21) is connected to the middle of the diversion pipe (23), and the diversion pipe (23) is connected to the corresponding outflow pipe (21); a collection pipe (24) is rotatably connected to the return pipe (22), the return pipe (22) is connected to the middle of the collection pipe (24), and the collection pipe (24) is connected to the corresponding return pipe (22); a fixed frame (25) is fixed between the diversion pipe (23) and the corresponding collection pipe (24); a side baffle (251) is fixed to the left and right sides of the fixed frame (25); the fixed frame (25) Several heat dissipation fins (26) are fixedly connected inside, and the heat dissipation fins (26) are parallel to the side of the transformer (1); the outer surface of the heat dissipation fins (26) is coated with a layer of PTFE coating; the heat dissipation fins (26) are respectively connected to the corresponding shunt pipe (23) and the collector pipe (24); the middle part of the shunt pipe (23) is fixedly connected to the adjusting gear (27); a motor (28) is installed on the outlet pipe (21); the output shaft of the motor (28) is fixedly connected to the drive gear (29); the drive gear (29) meshes with the corresponding adjusting gear (27); a rain shield (3) is fixedly connected to the outlet pipe (21). The outflow pipe (21) is connected to the corresponding branch pipe (23) and a first main sealing ring (211) is fixedly connected to one side; the return pipe (22) is connected to the corresponding collector pipe (24) and a second main sealing ring (221) is fixedly connected to one side. A first auxiliary sealing ring (231) is fixedly connected to the shunt pipe (23) and closely attached to the corresponding first main sealing ring (211); a second auxiliary sealing ring (241) is fixedly connected to the manifold pipe (24) and closely attached to the corresponding second main sealing ring (221). The front and rear sides of the rain shield (3) are longer than its left and right sides; the left and right sides of the fixed frame (25) are longer than its front and rear sides; the front and rear sides of the rain shield (3) are longer than the left and right sides of the fixed frame (25).

2. The high-strength plate-type heat sink according to claim 1, characterized in that: A cooling fan (41) is installed on the return pipe (22); a gas dryer (42) is installed at the bottom of the transformer (1); a gas supply pipe (43) is fixed between the air inlet of the cooling fan (41) and the air outlet of the gas dryer (42).

3. A high-strength plate-type heat sink according to claim 1, characterized in that: An environmental monitoring instrument (5) is installed on the outflow pipe (21) to monitor the humidity and temperature environment of the heat dissipation fins (26) below.

4. A high-strength plate-type heat sink according to claim 1, characterized in that: The heat dissipation fins (26) are designed as a corrugated anti-seismic structure with a small angle of inclination.

5. A high-strength plate-type heat sink according to claim 1, characterized in that: The first main sealing ring (211), the second main sealing ring (221), the first auxiliary sealing ring (231), and the second auxiliary sealing ring (241) are made of elastic shock-absorbing rubber material.

6. A high-strength plate-type heat sink according to any one of claims 1-5, characterized in that: A sliding rod (31) is fixedly connected to the rain shield (3), and the rain shield (3) is slidably connected to the corresponding outflow pipe (21) through the sliding rod (31).

7. A high-strength plate-type heat sink according to claim 2, characterized in that: The bottom of the gas supply pipe (43) is connected to a drain pipe (431); a sealing plug (432) is inserted into the drain pipe (431).

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