A transformer oil tank structure combining corrugated heat dissipation and heat pipe heat dissipation
By combining corrugated heat dissipation and heat pipe heat dissipation in the transformer tank structure, the problems of reduced liquid flow and poor sealing performance caused by the increase in heat sink size are solved, realizing efficient heat dissipation and low-cost transformer design to adapt to different capacity and environmental requirements.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGDONG BAICHANG ELECTRIC POWER EQUIP CO LTD
- Filing Date
- 2025-05-20
- Publication Date
- 2026-06-12
AI Technical Summary
When the capacity of a conventional oil-immersed transformer increases, the size of the heat sink increases, which reduces the fluidity of the liquid, making it difficult for hot oil to reach distant ends. This results in uncertain heat dissipation and poor sealing performance, leading to increased costs.
It adopts a structure that combines corrugated heat dissipation and heat pipe heat dissipation. The tank body and the tank cover are connected by welding. Heat pipes and corrugated fin radiators are configured. Heat is conducted by circulating liquid working fluid. Combined with distributed layout and modular design, it can adapt to different capacity requirements.
It improves heat dissipation efficiency, reduces temperature rise, extends transformer life, reduces the risk of oil leakage, lowers maintenance costs, and adapts to different environmental needs.
Smart Images
Figure CN224355077U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of power equipment technology, and in particular to a transformer tank structure that combines corrugated heat dissipation and heat pipe heat dissipation. Background Technology
[0002] The oil tank is one of the main components of an oil-immersed power transformer. It serves as the outer shell protecting the transformer body, the container for the transformer oil, the skeleton for assembling external parts and components, and also as part of the transformer's heat dissipation system. A typical oil-immersed transformer tank usually consists of tank walls, a cover, and a base. The tank and cover are fixed together with bolts. A sealing ring is used between the tank edge and the cover to prevent oil leakage. However, the actual sealing performance of these products is poor, especially in rainy weather, as the sealing ring under the cover ages. Currently, conventional transformers use corrugated fin radiators. When increasing transformer capacity, a larger heat dissipation area is required, necessitating an increase in the tank volume and the size and number of fins on the sides to achieve this. However, as the fin size increases, the fluidity of the liquid at the far end of the fins decreases sharply, making it difficult for the transformer oil to reach the fins, significantly weakening the heat dissipation effect and increasing its uncertainty. Therefore, additional fins are needed in the design, further increasing the tank volume and raising production and maintenance costs. Therefore, addressing the issue of increased size resulting from increased transformer capacity is an urgent problem to be solved. Utility Model Content
[0003] This invention provides a transformer tank structure that combines corrugated heat dissipation and heat pipe heat dissipation. It can solve the problem in the prior art that due to the continuous increase in the size of the heat sink, the fluidity of the liquid at the far end of the heat sink decreases sharply, making it difficult for the transformer hot oil to reach it, which greatly weakens the heat dissipation effect and makes the heat dissipation effect uncertain.
[0004] The objective of this utility model can be achieved through the following technical solutions:
[0005] A transformer tank structure combining corrugated heat dissipation and heat pipe heat dissipation, comprising:
[0006] Fuel tank body;
[0007] The tank cover is sealed to the tank body by welding.
[0008] The tank edge is welded to the top edge of the fuel tank body;
[0009] Heat pipe radiator, installed on top of the fuel tank body;
[0010] Corrugated radiators are selectively installed on the side of the oil tank body, depending on the transformer capacity.
[0011] The base supports the fuel tank body;
[0012] The tank wall connects the tank body to the base.
[0013] Preferably, the heat pipe radiator is composed of an aluminum profile and a sealed metal heat pipe, wherein the sealed metal heat pipe is filled with a liquid working fluid for conducting heat from transformer oil to the aluminum profile for heat dissipation.
[0014] Preferably, the tank cover and the tank body are sealed together by full welding.
[0015] Preferably, the installation positions of the corrugated fin heat sink and the heat pipe heat sink are adjusted according to the transformer capacity. Small-capacity transformers are equipped with only heat pipe heat sinks, while large-capacity transformers are equipped with both heat pipe heat sinks and corrugated fin heat sinks.
[0016] Preferably, the tank body, base, and tank wall are formed into an integral structure by continuous welding, and the sealing performance is verified by a positive pressure sealing test after welding is completed.
[0017] Preferably, the high-voltage terminal is installed on the top of the tank cover and uses a fully insulated European-style cable head sleeve, while the low-voltage terminal is installed on the side of the tank body.
[0018] Preferably, the heat pipe radiator is a modular design that can be installed or replaced on-site.
[0019] Preferably, the oil passage inside the oil tank is designed such that hot oil flows preferentially through the heat pipe radiator area.
[0020] Preferably, the transformer tank structure is used for underground transformers.
[0021] Preferably, when used in underground transformers, a moisture-proof layer is added to the bottom of the tank body, and the heat pipe radiator and the corrugated fin radiator are arranged in a distributed manner.
[0022] The beneficial effects of this utility model are:
[0023] (1) By combining heat pipe heat dissipation and corrugated plate heat dissipation, the heat dissipation efficiency of the transformer is significantly improved, the temperature rise of the transformer is reduced, and the service life of the transformer is extended.
[0024] (2) For small-capacity transformers, only heat pipe radiators are configured, which avoids redundant design and saves space; for large-capacity transformers, the heat dissipation area is expanded by corrugated radiators, which improves space utilization.
[0025] (3) The tank body and the tank cover are sealed by full welding. The tank body, the base and the tank wall are continuously welded to form an integral structure. After welding, the sealing performance is verified by positive pressure sealing test, which effectively prevents the occurrence of transformer oil leakage.
[0026] (4) The heat pipe radiator is a modular design that can be installed or replaced on site, which facilitates maintenance and replacement and reduces maintenance costs.
[0027] (5) When the transformer is used as an underground transformer, a moisture-proof layer is added to the bottom of the tank body, and the heat pipe radiator and the corrugated radiator are distributed in a distributed layout, which effectively adapts to the special needs of the underground environment. Attached Figure Description
[0028] The present invention will be further described below with reference to the accompanying drawings.
[0029] Figure 1 This is a three-dimensional structural diagram of a transformer tank structure that combines corrugated heat dissipation and heat pipe heat dissipation according to this utility model.
[0030] Figure 2 This is a schematic diagram of the main structure of a transformer tank that combines corrugated heat dissipation and heat pipe heat dissipation according to this utility model.
[0031] Figure 3 This is a side view of a transformer tank structure that combines corrugated heat dissipation and heat pipe heat dissipation according to the present invention.
[0032] Figure 4 This is a top view schematic diagram of a transformer tank structure that combines corrugated heat dissipation and heat pipe heat dissipation according to this utility model.
[0033] Explanation of reference numerals in the attached figures:
[0034] 1. Tank body; 2. Tank cover; 3. Tank edge; 4. Heat pipe radiator; 5. Corrugated fin radiator; 6. Base; 7. Tank wall. Detailed Implementation
[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0036] Please see Figures 1 to 4 As shown, this utility model is a transformer tank structure combining corrugated heat dissipation and heat pipe heat dissipation, comprising:
[0037] The tank body 1, as the main structural component of the transformer oil tank, carries the transformer oil and provides an installation base for other components;
[0038] The tank cover 2 is sealed to the tank body 1 by welding, which enhances the sealing performance of the tank body 1 and effectively prevents transformer oil leakage.
[0039] The tank edge 3 is welded to the top edge of the tank body 1, providing installation positioning for the tank cover 2 and enhancing the structural strength of the tank body 1.
[0040] Heat pipe radiator 4 is installed on the top of the oil tank 1. It uses liquid working fluid to achieve efficient heat conduction and dissipation, which significantly improves the heat dissipation efficiency of the transformer.
[0041] The corrugated radiator 5 is selectively installed on the side of the oil tank 1 according to the transformer capacity, thereby further enhancing the heat dissipation effect by increasing the heat dissipation area.
[0042] The base 6 supports the tank body 1, ensuring the stable placement of the transformer tank;
[0043] The tank wall 7 connects the tank body 1 and the base 6 to form an integral structure, which enhances the structural strength and sealing performance of the tank.
[0044] In an optional embodiment, the heat pipe radiator 4 is composed of an aluminum profile and a sealed metal heat pipe, the sealed metal heat pipe being filled with a liquid working fluid for conducting heat from transformer oil to the aluminum profile for heat dissipation.
[0045] It should be noted that the liquid working fluid evaporates when heated inside the heat pipe, moves to the aluminum profile section, condenses and releases heat, and then flows back to the hot oil area through capillary action or gravity, forming a cycle. The phase change process of the liquid working fluid makes the heat transfer efficiency extremely high, which can quickly dissipate the heat in the transformer oil. No external power source is required; heat dissipation can be achieved by relying on the natural circulation of the liquid working fluid.
[0046] In an optional embodiment, the tank cover 2 and the tank body 1 are sealed together by full welding.
[0047] It should be noted that the fully welded connection method effectively prevents transformer oil leakage, improves the sealing performance of the oil tank, and the welded connection makes the connection between the tank cover 2 and the oil tank body 1 firm, enhancing the stability of the overall structure.
[0048] In an optional embodiment, the installation positions of the corrugated fin heat sink 5 and the heat pipe heat sink 4 are adjusted according to the transformer capacity. Small-capacity transformers are equipped with only the heat pipe heat sink 4, while large-capacity transformers are equipped with both the heat pipe heat sink 4 and the corrugated fin heat sink 5.
[0049] It should be noted that in this embodiment, the heat dissipation configuration is divided based on the transformer's rated capacity, with 5MVA as the dividing point:
[0050] Small capacity transformers ≤250KVA: Only heat pipe radiators 4 are configured, which utilize their self-driving heat dissipation characteristics to meet heat dissipation requirements, avoid redundant design, reduce material costs, and are suitable for space-constrained scenarios such as urban power distribution.
[0051] Large-capacity transformers >250KVA: Combining heat pipe radiators 4 and corrugated fin radiators 5, the corrugated fins expand the heat dissipation area to cope with high heat generation. This improves the transformer's heat dissipation efficiency and reduces temperature rise, making it suitable for industrial and power grid hub scenarios.
[0052] In an optional embodiment, the tank body 1, the base 6, and the tank wall 7 are formed into an integral structure by continuous welding, and the sealing performance is verified by a positive pressure sealing test after welding is completed.
[0053] It should be noted that continuous welding ensures a firm connection between the tank body 1, the base 6, and the tank wall 7, enhancing the overall structural strength. The positive pressure sealing test verified the sealing performance of the welded parts, effectively preventing transformer oil leakage.
[0054] In an optional embodiment, the high-voltage terminal is installed on the top of the cover 2, using a fully insulated European-style cable head sleeve, while the low-voltage terminal is installed on the side of the tank body 1.
[0055] It should be noted that the installation positions of the high-voltage and low-voltage terminals are reasonable, which facilitates the connection and exit of cables, while the fully insulated European-style cable head sleeve improves the insulation performance of the high-voltage terminals and reduces the risk of electric shock.
[0056] In an optional embodiment, the heat pipe radiator 4 is a modular design that can be installed or replaced on-site.
[0057] It should be noted that the modular design allows the heat pipe radiator 4 to be easily installed or replaced on-site, reducing maintenance difficulty and cost. The number and location of the heat pipe radiator 4 can also be flexibly configured according to actual needs to adapt to transformers of different capacities.
[0058] In an optional embodiment, the oil passage inside the oil tank 1 is designed such that hot oil flows preferentially through the heat pipe radiator 4 area, which allows heat to be dissipated more quickly and improves heat dissipation efficiency.
[0059] In other alternative embodiments, the transformer tank structure described in this application can also be used in underground transformers. When used in underground transformers, a moisture-proof layer is added to the bottom of the tank body 1, and the heat pipe radiator 4 and the corrugated fin radiator 5 are arranged in a distributed manner.
[0060] It should be noted that the moisture-proof layer effectively isolates underground moisture, protects the transformer tank and its internal components from moisture, reduces corrosion and damage caused by humid environments, and extends the service life of the transformer.
[0061] The working principle of this invention is as follows: The heat pipe radiator 4 consists of an aluminum profile and a sealed metal heat-conducting pipe, which is filled with a liquid working fluid. When the transformer oil temperature rises, the hot oil preferentially flows through the area of the heat pipe radiator 4. The heat is conducted to the aluminum profile through the liquid working fluid in the sealed metal heat-conducting pipe, and the aluminum profile then dissipates the heat to the surrounding environment, thus achieving heat dissipation. The corrugated fin radiator 5 is selectively installed on the side of the oil tank 1 according to the transformer capacity. For large-capacity transformers, the corrugated fin radiator 5 further enhances the heat dissipation effect by increasing the heat dissipation area. The corrugated design increases the heat dissipation area, further improving the heat dissipation efficiency. Small-capacity transformers are only equipped with the heat pipe radiator 4, utilizing its self-driving heat dissipation characteristics to meet the heat dissipation requirements; large-capacity transformers are equipped with both the heat pipe radiator 4 and the corrugated fin radiator 5, achieving efficient heat dissipation of the transformer oil through the combination of the two heat dissipation methods.
[0062] The above description provides a detailed account of one embodiment of the present invention. However, this description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the patent coverage of the present invention.
Claims
1. A transformer tank structure combining corrugated heat dissipation and heat pipe heat dissipation, characterized in that: include: Fuel tank body (1); The tank cover (2) is sealed to the tank body (1) by welding; The tank edge (3) is welded to the top edge of the tank body (1); Heat pipe radiator (4) is installed on the top of the oil tank body (1); The corrugated radiator (5) is selectively installed on the side of the tank body (1) according to the transformer capacity; The base (6) supports the oil tank body (1); The tank wall (7) connects the tank body (1) to the base (6).
2. The transformer tank structure combining corrugated heat dissipation and heat pipe heat dissipation according to claim 1, characterized in that, The heat pipe radiator (4) is composed of an aluminum profile and a sealed metal heat pipe. The sealed metal heat pipe is filled with a liquid working fluid for conducting heat from transformer oil to the aluminum profile for heat dissipation.
3. The transformer tank structure combining corrugated heat dissipation and heat pipe heat dissipation according to claim 1, characterized in that, The tank cover (2) and the tank body (1) are sealed together by full welding.
4. The transformer tank structure combining corrugated heat dissipation and heat pipe heat dissipation according to claim 1, characterized in that, The installation positions of the corrugated radiator (5) and the heat pipe radiator (4) are adjusted according to the transformer capacity. Small-capacity transformers are only equipped with heat pipe radiators (4), while large-capacity transformers are equipped with both heat pipe radiators (4) and corrugated radiators (5).
5. The transformer tank structure combining corrugated heat dissipation and heat pipe heat dissipation according to claim 1, characterized in that, The tank body (1), base (6), and tank wall (7) are formed into an integral structure by continuous welding. After welding, the sealing performance is verified by positive pressure sealing test.
6. The transformer tank structure combining corrugated heat dissipation and heat pipe heat dissipation according to claim 1, characterized in that, The heat pipe radiator (4) is a modular design that can be installed or replaced on-site.
7. The transformer tank structure combining corrugated heat dissipation and heat pipe heat dissipation according to claim 1, characterized in that, The oil passage inside the oil tank body (1) is designed so that hot oil flows preferentially through the heat pipe radiator (4) area.
8. A transformer tank structure combining corrugated heat dissipation and heat pipe heat dissipation according to any one of claims 1-7, characterized in that, The transformer tank structure is used for underground transformers.
9. A transformer tank structure combining corrugated heat dissipation and heat pipe heat dissipation according to claim 8, characterized in that, When used in underground transformers, a moisture-proof layer is added to the bottom of the tank body (1), and the heat pipe radiator (4) and the corrugated radiator (5) are arranged in a distributed manner.