A distributed heat dissipation structure of a natural lipid transformer

Abstract

The utility model discloses a kind of distributed heat dissipation structure of natural grease transformer, heat dissipation mechanism is independently set in outdoor environment, avoid the problem that air circulation is not smooth caused by main transformer indoor space is narrow, benefit outdoor heat dissipation condition, significantly enhance heat exchange effect, effectively reduce the internal temperature of natural grease transformer, prolong equipment service life;And heat dissipation mechanism is independently set, it is convenient to maintain separately to heat dissipation part, pipeline etc., improve operation efficiency;Transformer main body is set in main transformer indoor, avoid the influence of external environment to transformer key components, and reduce the interference of transformer operating noise to surrounding environment;In addition, heat dissipation mechanism uses multiple heat dissipation parts to cooperate with the shunt collection design of oil main pipe, oil main pipe, can flexibly arrange heat dissipation part quantity and arrangement according to heat dissipation demand, break through the problem that heat dissipation device arrangement is limited in integrated structure, maximize heat dissipation area, avoid air passage obstruction between radiating fin simultaneously, guarantee heat exchange continues efficiently.

Description

Technical Field

[0001] This utility model relates to the field of transformer heat dissipation technology, and in particular to a distributed heat dissipation structure for a natural grease transformer. Background Technology

[0002] In power systems, transformers are indispensable key equipment, and their safe and stable operation is crucial to ensuring the reliability of power supply. Natural ester transformers use natural ester insulating oil, which has the characteristics of being biodegradable, green and pollution-free, making natural ester transformers increasingly widely used in the market. However, compared with mineral oil, natural ester insulating oil has a higher viscosity, and its fluidity and heat dissipation capacity are slightly inferior.

[0003] Currently, most natural grease transformers adopt an integrated heat dissipation structure; however, this structure has many problems in practical applications: Firstly, in an integrated structure, the transformer windings, core, and heat dissipation devices are compactly arranged in the main transformer room. As the transformer capacity continues to increase, the heat generated increases. The limited space has poor air circulation and inadequate natural convection, making it difficult for heat to dissipate quickly. This leads to an increase in the internal temperature of the transformer, affecting the normal operation and service life of the equipment.

[0004] Secondly, due to the need to consider the installation and operation of other transformer components, the arrangement of the heat dissipation device cannot reach the optimal state, making it difficult to obtain the maximum heat dissipation area, thus affecting the heat dissipation efficiency; moreover, in a limited space, the air circulation channels between heat sinks are easily blocked, further hindering the heat exchange process.

[0005] Third, the compact design of the integrated structure results in a small internal space. When maintenance personnel carry out maintenance and repair work, the operating space is limited, making it difficult to conduct a comprehensive and detailed inspection and repair of the transformer's key components and heat dissipation devices. It is evident that existing technologies still need improvement and enhancement. Utility Model Content

[0006] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a distributed heat dissipation structure for a natural grease transformer, which separates the transformer from the outdoor heat dissipation mechanism, optimizes the indoor space of the main transformer, and utilizes the advantages of the vast outdoor space and air circulation to improve heat dissipation efficiency.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A distributed heat dissipation structure for a natural grease transformer includes a natural grease transformer, an oil supply mechanism, an oil return mechanism, and a heat dissipation mechanism. The natural grease transformer is located in the main transformer room, and the heat dissipation mechanism is located in the outdoor environment. The heat dissipation mechanism includes multiple heat dissipation sections, a main oil distribution pipe, and a main oil collection pipe. The high-temperature output end of the natural grease transformer is connected to the input end of the main oil distribution pipe through the oil supply mechanism. The main oil distribution pipe is used to distribute insulating oil to each heat dissipation section. The low-temperature input end of the natural grease transformer is connected to the output end of the main oil collection pipe through the oil return mechanism. The main oil collection pipe is used to collect the insulating oil cooled by the heat dissipation sections.

[0008] In the distributed heat dissipation structure of the natural grease transformer, the oil supply mechanism includes a main oil supply pipe and a secondary oil supply pipe, and the oil return mechanism includes a main oil return pipe and a secondary oil return pipe; the top left and top right sides of the main oil distribution pipe are respectively provided with a main oil inlet and a secondary oil inlet, and the bottom left and bottom right sides of the main oil collection pipe are respectively provided with a secondary oil return and a main oil return; the natural grease transformer, the main oil supply pipe, the main oil inlet, the main oil distribution pipe, the heat dissipation mechanism, the main oil collection pipe, the main oil return, and the main oil return pipe are connected in sequence to form a main circulation oil circuit; the natural grease transformer, the secondary oil supply pipe, the secondary oil inlet, the main oil distribution pipe, the heat dissipation mechanism, the main oil collection pipe, the secondary oil return, and the secondary oil return pipe are connected in sequence to form a secondary circulation oil circuit.

[0009] In the distributed heat dissipation structure of the natural grease transformer, one-way valves are respectively provided at the output end of the main oil supply pipe, the output end of the auxiliary oil supply pipe, the input end of the main oil return pipe, and the input end of the auxiliary oil return pipe.

[0010] In the distributed heat dissipation structure of the natural grease transformer, the main return oil pipe includes a first main return oil branch pipe and a second main return oil branch pipe connected by a first flange; the auxiliary return oil pipe includes a first auxiliary return oil branch pipe and a second auxiliary return oil branch pipe connected by a second flange; the main supply oil pipe includes a first main supply oil branch pipe and a second main supply oil branch pipe connected by a third flange; the auxiliary supply oil pipe includes a first auxiliary supply oil branch pipe and a second auxiliary supply oil branch pipe connected by a fourth flange; the first main return oil branch pipe, the first auxiliary return oil branch pipe, the first main supply oil branch pipe, and the first auxiliary supply oil branch pipe are respectively located in the main transformer room, and the second main return oil branch pipe, the second auxiliary return oil branch pipe, the second main supply oil branch pipe, and the second auxiliary supply oil branch pipe are respectively located in the outdoor environment.

[0011] In the distributed heat dissipation structure of the natural grease transformer, the outer surfaces of the main oil distribution pipe, the main oil collection pipe, the second main return oil branch pipe, the second auxiliary return oil branch pipe, the second main supply oil branch pipe, and the second auxiliary supply oil branch pipe are respectively covered with reflective heat insulation material.

[0012] The distributed heat dissipation structure of the natural grease transformer also includes a condensate collection device, which is located in the main transformer room and is used to collect the condensate precipitated on the surface of the first main return oil branch pipe, the first auxiliary return oil branch pipe, the first main supply oil branch pipe, and the first auxiliary supply oil branch pipe.

[0013] In the distributed heat dissipation structure of the natural grease transformer, the heat dissipation section includes two or more plate heat exchangers. The top and bottom of each plate heat exchanger are respectively provided with an oil inlet branch pipe and an oil collection branch pipe. The input end of the oil inlet branch pipe is connected to the output end of the main oil distribution pipe, and the output end of the oil inlet branch pipe is connected to the input end of the plate heat exchanger. The input end of the oil collection branch pipe is connected to the output end of the plate heat exchanger, and the output end of the oil collection branch pipe is connected to the input end of the main oil collection pipe.

[0014] In the distributed heat dissipation structure of the natural grease transformer, the plate heat exchanger includes multiple fins with a fin density of 17 fins per inch; each fin has a height of 0.9m and a length of 0.08m, and the spacing between adjacent fins is 0.036m; the fins are made of aluminum-copper alloy.

[0015] The distributed heat dissipation structure of the natural grease transformer also includes a sunshade mechanism, which is located above the heat dissipation mechanism and is fixedly connected to it.

[0016] In the distributed heat dissipation structure of the natural grease transformer, the sunshade mechanism includes a sunshade cloth and a windproof rope; the ends of the oil inlet branches of the plate heat exchangers located on the left, right and middle are provided with connecting rods, and the top of the connecting rods is provided with a first connecting hole; the left, right and middle parts of the sunshade cloth are respectively provided with second connecting holes, and the second connecting holes are connected to the first connecting holes through the windproof ropes; the sunshade cloth includes a basic woven layer and a sun-protective coating, and the sun-protective coating is applied to the upper surface of the basic woven layer.

[0017] Beneficial effects: This invention provides a distributed heat dissipation structure for a natural grease transformer. By independently setting the heat dissipation mechanism outdoors, it avoids the problem of poor air circulation caused by the small space inside the main transformer room. Utilizing outdoor natural convection and a larger heat dissipation space, it significantly enhances the heat exchange effect, effectively reduces the internal temperature of the natural grease transformer, and extends the service life of the equipment. Moreover, the independent outdoor setting of the heat dissipation mechanism facilitates individual maintenance of the heat dissipation section and pipelines, improving operation and maintenance efficiency. The transformer body is set inside the main transformer room, reducing the space occupied by the compact structure, facilitating comprehensive inspection of key transformer components by maintenance personnel, avoiding the influence of the external environment on key components, and reducing the impact of transformer operating noise on the surrounding environment. In addition, the heat dissipation mechanism adopts a design with multiple heat dissipation sections and a distribution and collection main oil pipe, which allows for flexible arrangement of the number and arrangement of heat dissipation sections according to heat dissipation requirements. This overcomes the problem of limited heat dissipation device arrangement in integrated structures, maximizes the heat dissipation area, and avoids the blockage of air channels between heat dissipation fins, ensuring continuous and efficient heat exchange. Attached Figure Description

[0018] Figure 1 A schematic diagram of the distributed heat dissipation structure provided by this utility model.

[0019] Explanation of main component symbols: 1-natural grease transformer, 21-main oil supply pipe, 211-first main oil supply branch pipe, 212-third flange, 213-second main oil supply branch pipe, 22-auxiliary oil supply pipe, 221-first auxiliary oil supply branch pipe, 222-fourth flange connection, 223-second auxiliary oil supply branch pipe, 31-heat dissipation unit, 32-main oil distribution pipe, 33-oil inlet branch pipe, 4-connecting rod. Detailed Implementation

[0020] This utility model provides a distributed heat dissipation structure for a natural grease transformer 1. To make the purpose, technical solution and effects of this utility model clearer and more explicit, the following describes this utility model in further detail with reference to the accompanying drawings and embodiments.

[0021] In the description of this utility model, it should be understood that the terms "upper," "top," "left," "middle," "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and should not be construed as limiting this utility model; in addition, the terms "installation," "connection," etc. should be interpreted broadly, and those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0022] Please see Figure 1This utility model provides a distributed heat dissipation structure for a natural grease transformer 1, including a natural grease transformer 1, an oil supply mechanism, an oil return mechanism, and a heat dissipation mechanism. The natural grease transformer 1 is located in the main transformer room, and the heat dissipation mechanism is located in the outdoor environment. The heat dissipation mechanism includes multiple heat dissipation sections 31, a main oil distribution pipe 32, and a main oil collection pipe. The high-temperature output end of the natural grease transformer 1 is connected to the input end of the main oil distribution pipe 32 through the oil supply mechanism. The main oil distribution pipe 32 is used to distribute insulating oil to each heat dissipation section 31. The low-temperature input end of the natural grease transformer 1 is connected to the output end of the main oil collection pipe through the oil return mechanism. The main oil collection pipe is used to collect the insulating oil cooled by the heat dissipation sections 31.

[0023] This application provides a distributed heat dissipation structure for a natural grease transformer 1. By independently setting the heat dissipation mechanism outdoors, the problem of poor air circulation caused by the small space inside the main transformer room is avoided. Utilizing outdoor natural convection and a larger heat dissipation space, the heat exchange effect is significantly enhanced, effectively reducing the internal temperature of the natural grease transformer 1 and extending the service life of the equipment. Moreover, the independent outdoor setting of the heat dissipation mechanism facilitates individual maintenance of the heat dissipation section and pipelines, improving operation and maintenance efficiency. The transformer body is set inside the main transformer room, reducing the space occupied by the compact structure, facilitating comprehensive inspection of key transformer components by maintenance personnel, avoiding the influence of the external environment on key transformer components, and reducing the impact of transformer operating noise on the surrounding environment. In addition, the heat dissipation mechanism adopts a design of multiple heat dissipation sections 31 combined with the oil distribution main pipe 32 and the oil collection main pipe for diversion and convergence. The number and arrangement of heat dissipation sections 31 can be flexibly arranged according to heat dissipation requirements, overcoming the problem of limited heat dissipation device arrangement in integrated structures, maximizing the heat dissipation area, and avoiding the blockage of air channels between heat dissipation fins, ensuring continuous and efficient heat exchange.

[0024] In this embodiment, the natural grease transformer 1 and the outdoor heat dissipation mechanism form a closed loop through multiple sets of pipes. The pipes refer to the oil supply mechanism, the oil return mechanism, the oil distribution main 32, and the oil collection main. The pipes can be copper pipes or stainless steel pipes. The interfaces between the pipes and the natural grease transformer 1 and the plate heat exchanger are connected by flanges or argon arc welding to ensure that there is no leakage of natural grease insulating oil. When the natural grease transformer 1 is running, the heat generated by the winding and core losses causes the internal natural grease insulating oil to heat up. The hot oil is driven by the circulation pump integrated in the oil supply mechanism and flows to the outdoor heat dissipation mechanism through the upper oil supply mechanism. In the heat dissipation mechanism, the hot oil exchanges heat with the outside air through the fins. After cooling down, it flows back to the natural grease transformer 1 through the lower oil return mechanism to complete the heat dissipation cycle. By adopting the upper supply and lower return pipe layout, the oil flow is evenly distributed, avoiding local overheating.

[0025] Furthermore, the oil supply mechanism includes a main oil supply pipe 21 and a secondary oil supply pipe 22, and the oil return mechanism includes a main oil return pipe and a secondary oil return pipe; the top left and top right sides of the main oil distribution pipe 32 are respectively provided with a main oil inlet and a secondary oil inlet, and the bottom left and bottom right sides of the main oil collection pipe are respectively provided with a secondary oil return and a main oil return; the natural grease transformer 1, the main oil supply pipe 21, the main oil inlet, the main oil distribution pipe 32, the heat dissipation mechanism, the main oil collection pipe, the main oil return, and the main oil return pipe are connected in sequence to form a main circulation oil circuit; the natural grease transformer 1, the secondary oil supply pipe 22, the secondary oil inlet, the main oil distribution pipe 32, the heat dissipation mechanism, the main oil collection pipe, the secondary oil return, and the secondary oil return pipe are connected in sequence to form a secondary circulation oil circuit.

[0026] In this embodiment, the main circulation oil circuit and the auxiliary circulation oil circuit run in parallel and independently. Under normal load conditions, only the main circulation oil circuit is activated. Hot oil enters the main distribution oil pipe 32 through the main oil supply pipe 21, is distributed to the heat dissipation section 31 for cooling, and is then returned through the main return oil pipe to meet daily heat dissipation needs and reduce energy consumption. Under high load or high temperature conditions, such as when the transformer load rate exceeds 80% or the outdoor ambient temperature exceeds 35°C, the auxiliary circulation oil circuit is activated simultaneously. The two oil circuits jointly transport hot oil, which doubles the oil flow rate into the heat dissipation section 31 and simultaneously enhances the heat dissipation capacity, preventing the oil temperature from becoming too high. In addition, if the main circulation oil circuit experiences a fault such as blockage, it can be immediately switched to the auxiliary circulation oil circuit to ensure uninterrupted heat dissipation and continuous operation of the natural grease transformer 1.

[0027] In this embodiment, the dual oil circuit design allows for flexible adjustment of heat dissipation power based on load and ambient temperature, avoiding high energy consumption under low load and insufficient heat dissipation under high load. This effectively adapts to transformer load fluctuations, thereby reducing transformer outages caused by heat dissipation failures and improving the fault tolerance rate of the heat dissipation mechanism.

[0028] Furthermore, a one-way valve is provided at the output end of the main oil supply pipe 21, the output end of the auxiliary oil supply pipe 22, the input end of the main oil return pipe, and the input end of the auxiliary oil return pipe. In this embodiment, the one-way valve is sealed with metal spiral wound gaskets at the output end of the main oil supply pipe 21, the output end of the auxiliary oil supply pipe 22, the input end of the main oil return pipe, and the input end of the auxiliary oil return pipe to prevent leakage of insulating oil. By connecting the one-way valve in series, the problem of oil flow turbulence caused by reverse oil flow is prevented, and the mixing of hot and cold oil in the heat dissipation part 31 is avoided, ensuring stable heat dissipation efficiency and preventing accelerated aging of insulating oil. In addition, the one-way valve can prevent reverse oil flow from impacting the circulating pump impeller and transformer winding oil passages, reducing component wear and extending the service life of the circulating pump.

[0029] Further, the main return oil pipe includes a first main return oil branch pipe and a second main return oil branch pipe connected by a first flange; the auxiliary return oil pipe includes a first auxiliary return oil branch pipe and a second auxiliary return oil branch pipe connected by a second flange; the main supply oil pipe 21 includes a first main supply oil branch pipe 211 and a second main supply oil branch pipe 213 connected by a third flange 212; the auxiliary supply oil pipe 22 includes a first auxiliary supply oil branch pipe 221 and a second auxiliary supply oil branch pipe 223 connected by a fourth flange 222; the first main return oil branch pipe, the first auxiliary return oil branch pipe, the first main supply oil branch pipe 211 and the first auxiliary supply oil branch pipe 221 are respectively located in the main transformer room, and the second main return oil branch pipe, the second auxiliary return oil branch pipe, the second main supply oil branch pipe 213 and the second auxiliary supply oil branch pipe 223 are respectively located in the outdoor environment.

[0030] In this embodiment, the main and auxiliary return oil pipes and the main and auxiliary supply oil pipes 22 are respectively divided into indoor and outdoor sections, which are connected by flanges with metal spiral wound gaskets. In the actual construction phase, the indoor section is first connected to the natural grease transformer 1, then the outdoor section is connected to the heat dissipation mechanism, and finally the indoor and outdoor sections are connected by flanges. This reduces the difficulty of installing long pipelines as a whole, facilitates manual handling, greatly improves installation efficiency, and reduces construction costs. It is especially suitable for scenarios where there is a wall between the main transformer room and the outdoor environment. In addition, when a section of the pipeline leaks or becomes blocked, the corresponding flange can be removed to replace or repair that section of the branch pipe separately without replacing the entire pipeline, shortening maintenance time and reducing power outage losses.

[0031] Furthermore, the outer surfaces of the oil distribution main pipe 32, the oil collection main pipe, the second main return oil branch pipe, the second auxiliary return oil branch pipe, the second main supply oil branch pipe 213, and the second auxiliary supply oil branch pipe 223 are respectively covered with reflective heat insulation material.

[0032] In this embodiment, a wrapping and adhesive method is used to cover the outer surfaces of the main oil distribution pipe 32, the main oil collection pipe, the second main return oil branch pipe, the second auxiliary return oil branch pipe, the second main supply oil branch pipe 213, and the second auxiliary supply oil branch pipe 223 with reflective heat insulation material. During wrapping, it is ensured that the material is wrinkle-free. Finally, high-temperature resistant tape is used to fix the reflective heat insulation material. The reflective heat insulation material is aluminum foil fiberglass cloth, which can reflect more than 85% of sunlight, reducing the solar radiation heat absorbed by the pipeline and preventing the temperature of the insulating oil inside the pipeline from rising due to heat absorption. This reduces the heat load on the heat dissipation mechanism and indirectly improves heat dissipation efficiency. Simultaneously, it reduces the unnecessary loss of oil temperature from the pipeline to the outside and prevents outdoor rainwater and dust from directly contacting the pipeline surface, slowing down pipeline corrosion and extending the pipeline's service life.

[0033] Furthermore, the distributed heat dissipation structure of the natural grease transformer 1 also includes a condensate collection device, which is located in the main transformer room and is used to collect the condensate precipitated on the surfaces of the first main return oil branch pipe, the first auxiliary return oil branch pipe, the first main supply oil branch pipe 211, and the first auxiliary supply oil branch pipe 221.

[0034] In this embodiment, the condensate collection device includes a water collection tank, a guide pipe, and a water storage tank. The condensate collection device is fixed in the main transformer room near the first main return oil branch pipe, the first auxiliary return oil branch pipe, the first main supply oil branch pipe 211, and the first auxiliary supply oil branch pipe 221. The opening of the water collection tank faces upward and is close to the bottom of each branch pipe. One end of the guide pipe is connected to the water collection tank, and the other end is connected to the water storage tank.

[0035] In actual working environments, the air humidity inside the main transformer is high. The cold oil flowing in the indoor section can easily cause the surface temperature of the branch pipes to be lower than the air dew point temperature, causing water vapor in the air to condense into condensate on the surface of the branch pipes. When condensate is precipitated on the surface of the indoor section, the condensate drips down the surface of the branch pipes to the water collection tank below, and then flows into the water storage tank through the guide pipe. This prevents the condensate from dripping directly onto the transformer shell and insulation components, thereby preventing the condensate from seeping into the transformer insulation layer, avoiding a decrease in insulation resistance, reducing transformer insulation faults, and ensuring the safe operation of the entire substation.

[0036] Furthermore, the heat dissipation unit 31 includes two or more plate heat exchangers, with an oil inlet branch pipe 33 and an oil collection branch pipe respectively provided at the top and bottom of the plate heat exchangers; the input end of the oil inlet branch pipe 33 is connected to the output end of the main oil distribution pipe 32, and the output end of the oil inlet branch pipe 33 is connected to the input end of the plate heat exchanger; the input end of the oil collection branch pipe is connected to the output end of the plate heat exchanger, and the output end of the oil collection branch pipe is connected to the input end of the main oil collection pipe.

[0037] In this embodiment, each heat dissipation unit 31 is composed of two or more plate heat exchangers connected in parallel. Each plate heat exchanger has an oil inlet branch pipe 33 welded to its top and an oil collection branch pipe welded to its bottom. The input end of the oil inlet branch pipe 33 of each plate heat exchanger is sealed to the output end of the main oil distribution pipe 32, forming a multi-channel flow distribution structure. Furthermore, the output end of the oil collection branch pipe of each plate heat exchanger is sealed to the input end of the main oil collection pipe, forming a multi-channel convergence structure. By connecting multiple plate heat exchangers in parallel, the number of heat exchangers can be flexibly increased according to heat dissipation requirements, meaning the heat dissipation area can be flexibly expanded, and the heat dissipation area is significantly increased compared to an integrated heat dissipation device. In addition, the parallel flow distribution and convergence design of the oil inlet branch pipe 33 and the oil collection branch pipe can reduce the oil flow deviation of each plate heat exchanger, preventing localized overheating problems caused by insufficient oil flow in a single plate heat exchanger, and ensuring stable heat dissipation efficiency.

[0038] Preferably, the plate heat exchanger includes multiple fins with a fin density of 17 fins per inch; each fin has a height of 0.9m and a length of 0.08m, and the spacing between adjacent fins is 0.036m; the fins are made of aluminum-copper alloy.

[0039] In this embodiment, the core heat exchange component of the plate heat exchanger is multiple fins. The fins are fixed to the heat exchange tubes of the heat exchanger by embedding and welding, forming a dense fin group. The fin material is aluminum-copper alloy, which refers to a copper core wrapped with an aluminum layer, formed by extrusion. Aluminum-copper alloy combines the high thermal conductivity of copper with the lightweight and low-cost advantages of aluminum. Heat can be quickly transferred from the heat exchange tubes to the fin surface, improving the fin thermal conductivity. Furthermore, the aluminum layer of aluminum-copper alloy can form an oxide protective film to resist corrosion from outdoor rainwater and salt. This design extends the service life of the fins. Furthermore, the 17FPI fin density and 0.036m spacing ensure smooth airflow while maximizing the contact area between the fins and the air. The 0.9m fin height extends the airflow path between the fins, increasing heat exchange time and thus improving heat dissipation efficiency. Verification shows that in summer at 45℃, these fin parameters can reduce the hot oil temperature by 25-30℃, ensuring that the cold oil temperature returned to the transformer is ≤55℃, meeting the high-load operation requirements of the natural grease transformer 1.

[0040] Furthermore, the distributed heat dissipation structure of the natural grease transformer 1 also includes a sunshade mechanism, which is located above the heat dissipation mechanism and is fixedly connected to the heat dissipation mechanism.

[0041] In this embodiment, the shading mechanism can directly block sunlight from shining directly on the plate heat exchanger, preventing the heat exchanger fins and pipes from absorbing solar radiation heat and causing the temperature to rise. It can also create a shaded area under the shading mechanism, reducing the air temperature around the plate heat exchanger, increasing the temperature difference between the fins and the air, and enhancing the heat exchange effect.

[0042] Furthermore, the shading mechanism includes a shading cloth and a windproof rope; the ends of the oil inlet branch pipes 33 of the plate heat exchangers located on the left, right and middle are provided with connecting rods 4, and the top of the connecting rods 4 is provided with a first connecting hole; the left, right and middle parts of the shading cloth are respectively provided with second connecting holes, and the second connecting holes are connected to the first connecting holes through the windproof rope; the shading cloth includes a basic woven layer and a sun-protective coating, and the sun-protective coating is applied to the upper surface of the basic woven layer; In this embodiment, stainless steel connecting rods 4 are vertically welded to the ends of the oil inlet branch pipes 33 of the plate heat exchanger on the left, right, and middle sides. A first connecting hole is drilled at the top of the connecting rod 4. Second connecting holes are drilled on the left, right, and middle sides of the sunshade cloth. A windproof rope passes through the second connecting hole and the first connecting hole, and the sunshade cloth is tightened and fixed to the connecting rod 4 using a double-knot fixing method. The windproof rope is made of polyester. The sunshade cloth includes a basic woven layer and a sun-protective coating. The basic woven layer is made of high-strength polyester fiber warp and weft weave, which has the advantages of tear resistance and aging resistance. The sun-protective coating is an acrylic resin or aluminum foil coating, which is uniformly coated on the upper surface of the basic woven layer.

[0043] In this embodiment, the sun-protective coating reflects more than 90% of sunlight, while the base woven layer blocks the remaining light, preventing sunlight from penetrating the sunshade fabric. Simultaneously, the base woven layer has a certain degree of breathability, reducing the stuffiness effect of the air beneath the sunshade fabric. The tension of the windproof ropes can counteract the impact of wind on the sunshade fabric in windy weather, preventing it from being blown over or torn. They also have the advantage of easy disassembly; when the sunshade fabric is partially damaged, the damaged area can be replaced individually without replacing the entire fabric, reducing maintenance costs. The three-point fixing of the connecting rod 4 ensures even force distribution on the sunshade fabric, preventing localized pulling damage. The combination of the connecting rod 4 and the windproof ropes reduces the damage rate of the sunshade fabric in windy conditions, adapting to complex outdoor wind environments.

[0044] In this embodiment, the distributed heat dissipation structure further includes multiple cooling fans, each of which is configured in a one-to-one correspondence with a plate heat exchanger. Each cooling fan is fixedly installed at the bottom center of the corresponding plate heat exchanger via an L-shaped angle steel bracket and is fixedly connected to the mounting lug at the bottom of the plate heat exchanger. The cooling fan is an axial flow cooling fan, and the bottom of the L-shaped angle steel bracket is also provided with a shock-absorbing rubber pad.

[0045] It is understood that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of this utility model, and all such substitutions or changes should fall within the protection scope of this utility model.

Claims

1. A distributed heat dissipation structure for a natural grease transformer, characterized in that, The system includes a natural grease transformer, an oil supply mechanism, an oil return mechanism, and a heat dissipation mechanism. The natural grease transformer is located in the main transformer room, while the heat dissipation mechanism is located outdoors. The heat dissipation mechanism includes multiple heat dissipation sections, a main oil distribution pipe, and a main oil collection pipe. The high-temperature output end of the natural grease transformer is connected to the input end of the main oil distribution pipe through the oil supply mechanism. The main oil distribution pipe is used to distribute insulating oil to each heat dissipation section. The low-temperature input end of the natural grease transformer is connected to the output end of the main oil collection pipe through the oil return mechanism. The main oil collection pipe is used to collect the insulating oil cooled by the heat dissipation sections.

2. The distributed heat dissipation structure for a natural grease transformer according to claim 1, characterized in that, The oil supply mechanism includes a main oil supply pipe and a secondary oil supply pipe, and the oil return mechanism includes a main oil return pipe and a secondary oil return pipe. The top left and top right sides of the main oil distribution pipe are respectively provided with a main oil inlet and a secondary oil inlet, and the bottom left and bottom right sides of the main oil collection pipe are respectively provided with a secondary oil return and a main oil return. The natural grease transformer, main oil supply pipe, main oil inlet, main oil distribution pipe, heat dissipation mechanism, main oil collection pipe, main oil return, and main oil return pipe are sequentially connected to the main oil return pipe to form a main circulation oil circuit. The natural grease transformer, secondary oil supply pipe, secondary oil inlet, main oil distribution pipe, heat dissipation mechanism, main oil collection pipe, secondary oil return, and secondary oil return pipe are sequentially connected to form a secondary circulation oil circuit.

3. The distributed heat dissipation structure for a natural grease transformer according to claim 2, characterized in that, One-way valves are respectively provided at the output end of the main oil supply pipe, the output end of the auxiliary oil supply pipe, the input end of the main oil return pipe, and the input end of the auxiliary oil return pipe.

4. The distributed heat dissipation structure for a natural grease transformer according to claim 2, characterized in that, The main return oil pipe includes a first main return oil branch pipe and a second main return oil branch pipe connected by a first flange; the auxiliary return oil pipe includes a first auxiliary return oil branch pipe and a second auxiliary return oil branch pipe connected by a second flange; the main supply oil pipe includes a first main supply oil branch pipe and a second main supply oil branch pipe connected by a third flange; the auxiliary supply oil pipe includes a first auxiliary supply oil branch pipe and a second auxiliary supply oil branch pipe connected by a fourth flange; the first main return oil branch pipe, the first auxiliary return oil branch pipe, the first main supply oil branch pipe and the first auxiliary supply oil branch pipe are respectively located in the main transformer room, and the second main return oil branch pipe, the second auxiliary return oil branch pipe, the second main supply oil branch pipe and the second auxiliary supply oil branch pipe are respectively located in the outdoor environment.

5. The distributed heat dissipation structure for a natural grease transformer according to claim 4, characterized in that, The outer surfaces of the main oil distribution pipe, the main oil collection pipe, the second main return oil branch pipe, the second auxiliary return oil branch pipe, the second main supply oil branch pipe, and the second auxiliary supply oil branch pipe are respectively covered with reflective heat insulation material.

6. The distributed heat dissipation structure for a natural grease transformer according to claim 4, characterized in that, It also includes a condensate collection device, which is located in the main transformer room and is used to collect the condensate that precipitates on the surface of the first main return oil branch pipe, the first auxiliary return oil branch pipe, the first main supply oil branch pipe, and the first auxiliary supply oil branch pipe.

7. The distributed heat dissipation structure for a natural grease transformer according to claim 1, characterized in that, The heat dissipation section includes two or more plate heat exchangers, with an oil inlet branch pipe and an oil collection branch pipe respectively provided at the top and bottom of the plate heat exchangers; the input end of the oil inlet branch pipe is connected to the output end of the main oil distribution pipe, and the output end of the oil inlet branch pipe is connected to the input end of the plate heat exchanger; the input end of the oil collection branch pipe is connected to the output end of the plate heat exchanger, and the output end of the oil collection branch pipe is connected to the input end of the main oil collection pipe.

8. The distributed heat dissipation structure for a natural grease transformer according to claim 7, characterized in that, The plate heat exchanger includes multiple fins with a fin density of 17 fins per inch; each fin has a height of 0.9m and a length of 0.08m, and the spacing between adjacent fins is 0.036m; the fins are made of aluminum-copper alloy.

9. The distributed heat dissipation structure for a natural grease transformer according to claim 7, characterized in that, It also includes a sunshade mechanism, which is located above the heat dissipation mechanism and is fixedly connected to the heat dissipation mechanism.

10. The distributed heat dissipation structure for a natural grease transformer according to claim 9, characterized in that, The shading mechanism includes a shading cloth and a windproof rope; the ends of the oil inlet branches of the plate heat exchangers located on the left, right and middle sides are provided with connecting rods, and the top of the connecting rods is provided with a first connecting hole; the left, right and middle sides of the shading cloth are respectively provided with second connecting holes, and the second connecting holes are connected to the first connecting holes through the windproof ropes; the shading cloth includes a basic woven layer and a sun-protective coating, and the sun-protective coating is applied to the upper surface of the basic woven layer.

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