An oil-immersed power transformer

Abstract

The utility model discloses an oil-immersed power transformer, which relates to the technical field of power transformers, and comprises an oil tank shell, a side box is fixedly installed on the right side of the surface of the oil tank shell, a ventilation mesh groove is opened above the outer surface of the side box, an oil inlet pipeline is fixedly installed on the inner surface of the side box, a first suction pump is arranged at the rear end of the oil inlet pipeline penetrating the side box, a water tank is fixedly arranged in the middle of the front side of the outer surface of the oil tank shell, and a delivery pipe is fixedly installed on the inner surface of the water tank. Compared with the existing ordinary oil-immersed power transformer, the oil-immersed power transformer can cover the oil inlet pipeline by spraying water mist through an atomizing nozzle, and can take away a large amount of heat by absorbing heat and evaporating the water mist, so as to quickly cool down the transformer oil in the oil inlet pipeline, and at the same time, the fan is used to continuously blow air to accelerate the evaporation rate of the water mist absorbing heat, and can also use natural air cooling to cool down the oil, which can greatly improve the cooling efficiency and heat dissipation capacity of the transformer oil.

Description

Technical Field

[0001] The utility model relates to the technical field of oil-immersed power transformers, in particular to an oil-immersed power transformer. Background Art

[0002] Power transformers are necessary equipment for power transmission and distribution. They are used to convert a certain value of AC voltage and current into another or several different values ​​of voltage and current with the same frequency. Power transformers can be oil-immersed power transformers or dry-type transformers due to different application environments. Oil-immersed power transformers are filled with transformer oil inside the transformer to cool and insulate the power transformer. The transformer oil filled inside is sealed in a special oil tank.

[0003] For example, the public document with application number 202022682369.9 discloses an oil-immersed power transformer. The utility model installs a sliding mechanism on a fixed frame to slide in a guide groove on the transformer shell, so that the transformer can be easily aligned when it is lifted, inspected and assembled using lifting equipment, reducing the time for frequent adjustments. The guide groove can guide the sliding mechanism to continuously correct its position during the falling process. A spring-connected guide pulley is provided on the guide block, which can form a buffer when the guide pulley contacts the transformer shell, reducing the damage to the winding caused by collision. However, for this oil-immersed power transformer, the transformer oil needs to be sealed in the oil tank when it is injected into the transformer. The transformer oil is equivalent to a static state, resulting in poor fluidity of the transformer oil. The transformer oil simply relies on the corrugated radiator to dissipate heat, which is not conducive to the rapid heat dissipation of the oil-immersed transformer and greatly affects the stable operation of the transformer.

[0004] Therefore, in view of this, the existing structural deficiencies are studied and improved, and an oil-immersed power transformer is proposed. Utility Model Content

[0005] The purpose of the utility model is to provide an oil-immersed power transformer to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an oil-immersed power transformer, comprising an oil tank shell, a side box is fixedly installed on the right side of the surface of the oil tank shell, a ventilation mesh groove is opened above the outer surface of the side box, an oil inlet pipeline is fixedly installed on the inner surface of the side box, a first suction pump is arranged at the rear end of the oil inlet pipeline passing through the side box, a water tank is fixedly installed on the middle part of the front side of the outer surface of the oil tank shell, a delivery pipe is fixedly installed on the inner surface of the water tank, and a heat dissipation mechanism is arranged on the right side of the surface of the side box.

[0007] Preferably, the rear end of the oil inlet pipeline passes through the side box below and is connected to the interior of the oil tank shell, and the lower end of the first suction pump passes through the water tank through a pipeline and is connected to the right end of the delivery pipe.

[0008] Preferably, the left end of the delivery pipe passes through the water tank, and the left end of the delivery pipe is connected to the upper left end of the interior of the oil tank shell through a pipeline.

[0009] Preferably, the heat dissipation mechanism includes a sealing cover plate fixedly arranged on the right side of the side box surface, and a fan is arranged in the middle of the surface of the sealing cover plate, and four atomizing nozzles are fixedly installed through the upper right side of the surface of the sealing cover plate.

[0010] Preferably, the heat dissipation mechanism further comprises a multi-way pipe connected to the rear end of the atomizing nozzle, a second suction pump is fixedly provided at the front end of the multi-way pipe, and a water inlet port of the second suction pump is connected to the lower part of the interior of the water tank through a pipeline.

[0011] Preferably, fins are fixedly mounted on the upper and lower sides of the outer surface of the water tank, and air holes are opened on the surfaces of the fins.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The utility model is provided with a heat dissipation mechanism, a sealing cover plate, a fan, an atomizing nozzle, a multi-way pipe and a second suction pump. The second suction pump can extract a certain amount of water, which is atomized through the multi-way pipe and the atomizing nozzle and then sprayed onto the surface of the oil inlet pipeline in the form of water mist. The water mist absorbs heat and evaporates, which can take away a large amount of heat and quickly cool the transformer oil in the oil inlet pipeline. At the same time, the fan is used to continuously blow air to accelerate the evaporation rate of the water mist, and the oil can also be cooled by natural air cooling, which can greatly improve the cooling efficiency and heat dissipation capacity of the transformer oil.

[0014] 2. The utility model is provided with ventilation mesh slots, oil inlet pipelines, a first suction pump, a water tank and a delivery pipe. The first suction pump sucks out the oil inside the oil tank shell through the oil inlet pipeline, ensures air circulation through the ventilation mesh slots, utilizes the oil inlet pipeline to exchange heat with the air, and at the same time delivers the oil in the oil inlet pipeline to the delivery pipe. The delivery pipe is utilized to fully contact with water inside the water tank for heat exchange, so as to further cool the internal oil. The cooled oil is then delivered back to the inside of the oil tank shell from the left end. Such a cycle can effectively cool the transformer oil, prevent the transformer oil from overheating, and ensure the normal and stable operation of the transformer.

[0015] 3. The utility model has fins and pores so that the fins can absorb the temperature between the water inside the water tank and the water tank, cool the water in the water tank, and use the raised plate surface to increase the contact surface with the air, thereby accelerating the heat exchange rate. The air can flow effectively and quickly between the fins through the pores, carrying and dissipating the heat, thereby further improving the heat exchange and heat dissipation performance of the fins. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the disassembled structure of the heat dissipation mechanism of the utility model;

[0018] Figure 3 It is a schematic diagram of the cross-sectional structure of the water tank of the utility model.

[0019] In the figure: 1. oil tank shell; 2. side box; 3. ventilation mesh; 4. oil inlet pipeline; 5. first suction pump; 6. water tank; 7. delivery pipe; 8. heat dissipation mechanism; 801. sealing cover plate; 802. fan; 803. atomizing nozzle; 804. multi-way pipe; 805. second suction pump; 9. fin; 10. air hole. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] like Figure 1-Figure 3As shown, an oil-immersed power transformer comprises an oil tank shell 1, a side box 2 is fixedly installed on the right side of the surface of the oil tank shell 1, a ventilation mesh groove 3 is opened above the outer surface of the side box 2, an oil inlet pipeline 4 is fixedly installed on the inner surface of the side box 2, a first suction pump 5 is arranged at the rear end of the oil inlet pipeline 4 penetrating through the side box 2, a water tank 6 is fixedly arranged at the middle of the front side of the outer surface of the oil tank shell 1, a delivery pipe 7 is fixedly installed on the inner surface of the water tank 6, a heat dissipation mechanism 8 is arranged on the right side of the surface of the side box 2, the rear end of the oil inlet pipeline 4 penetrates through the side box 2 and is connected with the interior of the oil tank shell 1, the lower end of the first suction pump 5 penetrates through the water tank 6 through a pipeline and is connected to the right end of the delivery pipe 7, and the left end of the delivery pipe 7 penetrates through the water tank 6. The left end of the delivery pipe 7 is connected to the upper left end of the inner part of the oil tank shell 1 through a pipeline. The heat dissipation mechanism 8 includes a sealing cover plate 801 fixedly arranged on the right side of the surface of the side box 2, and a fan 802 is arranged in the middle of the surface of the sealing cover plate 801. Four atomizing nozzles 803 are fixedly installed through the upper right side of the surface of the sealing cover plate 801. The heat dissipation mechanism 8 also includes a multi-way pipe 804 connected to the rear end of the atomizing nozzle 803, and a second suction pump 805 is fixedly arranged at the front end of the multi-way pipe 804. The water inlet port of the second suction pump 805 is connected to the lower part of the inner part of the water tank 6 through a pipeline. Fins 9 are fixedly installed on the upper and lower sides of the outer surface of the water tank 6, and air holes 10 are opened on the surface of the fins 9.

[0022] Furthermore, the water tank 6 is made entirely of copper, which can effectively conduct the heat generated after the water and transformer oil are exchanged, and the water in the water tank 6 can be added or directly extracted and replaced.

[0023] Furthermore, the delivery pipe 7 is a spiral pipeline, which can increase the flow of transformer oil and more fully exchange heat with the water in the water tank 6.

[0024] Furthermore, the fins 9 are attached to the surface of the water tank 6, and can quickly dissipate the heat absorbed by the water tank 6, ensuring that the temperature of the cooling water in the water tank 6 is not too high, resulting in a situation where heat exchange with the transformer oil cannot be performed.

[0025] Furthermore, the air holes 10 enable air to flow effectively and quickly between the fins 9, carrying and dissipating heat, thereby improving the heat exchange capacity of the fins 9 themselves.

[0026] Furthermore, the oil inlet pipeline 4, the first suction pump 5 and the delivery pipe 7 form a circulation passage outside the oil tank shell 1, so that the transformer oil inside can circulate and circulate to dissipate heat.

[0027] Furthermore, the second suction pump 805 can extract a portion of the water in the water tank 6 and provide it to the atomizing nozzle 803 for spraying.

[0028] Furthermore, after the atomizing nozzle 803 atomizes the water, it is sprayed onto the surface of the oil inlet pipeline 4 in the form of water mist. The water mist absorbs heat and evaporates, which can take away a large amount of heat and quickly cool the transformer oil in the oil inlet pipeline 4.

[0029] Furthermore, the fan 802 blows air continuously to accelerate the evaporation rate of the water mist and can also use natural air cooling to cool the oil.

[0030] Furthermore, the ventilation mesh slot 3 is composed of a through cavity and a dustproof net. The through cavity can ensure the circulation of air and also allow the evaporated water vapor to circulate, thereby ensuring the air flowability, while the dustproof net can prevent dust from falling in.

[0031] Working principle: When using the oil-immersed power transformer, first, water is injected into the water tank 6. Then, when the transformer is working, the first suction pump 5, the fan 802 and the second suction pump 805 are started synchronously. The first suction pump 5 will suck out the transformer oil inside the oil tank shell 1 through the oil inlet pipe 4. When the transformer oil flows in the oil inlet pipe 4, the ventilation mesh groove 3 ensures that the air circulates inside the side box 2, and then exchanges and dissipates heat with the oil inlet pipe 4. At this time, the second suction pump 805 can extract a certain amount of water from the water tank 6, and after being atomized by the multi-way pipe 804 and the atomizing nozzle 803, it is sprayed on the surface of the oil inlet pipe 4 in the form of water mist. The water mist absorbs heat and evaporates, which can take away a lot of heat. The fan 802 blows air towards the oil inlet pipe 4 to accelerate the evaporation rate of the water mist, and can also use natural air cooling to cool the oil. The transformer oil that has undergone the initial cooling in the side box 2 will enter the delivery pipe 7 after being sucked and transported by the first suction pump 5. The delivery pipe 7 is inside the water tank 6 and is fully in contact with water, so that the transformer oil can further dissipate heat and cool down. The transformer oil that has undergone multiple cooling will continue to move to the left end under the pressure continuously output by the first suction pump 5, and will be transported back to the oil tank shell 1 through the pipeline at the left end of the delivery pipe 7. The cycle is repeated, and the water will gradually increase its own temperature after heat exchange with the transformer oil. The water temperature will also be transferred to the shell of the water tank 6, and the fins 9 can absorb the temperature on the shell of the water tank 6 and use the raised plate surface to increase the contact surface with the air, so as to cool the water tank 6. The air can be effectively and quickly circulated between the fins 9 through the air holes 10 to carry and dissipate the heat. This is the working principle of the oil-immersed power transformer.

Claims

1. An oil-immersed power transformer, comprising an oil tank shell (1), characterized in that: A side box (2) is fixedly mounted on the right side of the surface of the oil tank shell (1); a ventilation mesh groove (3) is provided above the outer surface of the side box (2); an oil inlet pipeline (4) is fixedly mounted on the inner surface of the side box (2); a first suction pump (5) is provided at the rear end of the oil inlet pipeline (4) penetrating the side box (2); a water tank (6) is fixedly mounted on the middle part of the front side of the outer surface of the oil tank shell (1); a delivery pipe (7) is fixedly mounted on the inner surface of the water tank (6); and a heat dissipation mechanism (8) is provided on the right side of the surface of the side box (2).

2. The oil-immersed power transformer according to claim 1, characterized in that: The lower rear end of the oil inlet pipeline (4) passes through the side box (2) and is connected to the interior of the oil tank shell (1); the lower end of the first suction pump (5) passes through the water tank (6) and is connected to the right end of the delivery pipe (7) through a pipeline.

3. The oil-immersed power transformer according to claim 1, characterized in that: The left end of the delivery pipe (7) passes through the water tank (6), and the left end of the delivery pipe (7) is connected to the upper left end of the interior of the oil tank shell (1) through a pipeline.

4. The oil-immersed power transformer according to claim 1, characterized in that: The heat dissipation mechanism (8) comprises a sealing cover plate (801) fixedly arranged on the right side of the surface of the side box (2), and a fan (802) is arranged in the middle of the surface of the sealing cover plate (801), and four atomizing nozzles (803) are fixedly installed through the upper right side of the surface of the sealing cover plate (801).

5. The oil-immersed power transformer according to claim 1, characterized in that: The heat dissipation mechanism (8) further comprises a multi-way pipe (804) connected to the rear end of the atomizing nozzle (803), a second suction pump (805) being fixedly provided at the front end of the multi-way pipe (804), and a water inlet port of the second suction pump (805) being connected to the lower part of the interior of the water tank (6) through a pipeline.

6. The oil-immersed power transformer according to claim 1, characterized in that: Fins (9) are fixedly mounted on the upper and lower sides of the outer surface of the water tank (6), and air holes (10) are provided on the surfaces of the fins (9).

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