Mining oil-immersed transformer with filtering structure

Abstract

The utility model discloses a mining oil-immersed transformer with a filtering structure. The mining oil-immersed transformer comprises a transformer shell, an oil pump arranged in the shell, a filtering system, a cooling system and a circulating pipeline. The filter system comprises a filter cartridge arranged outside the transformer shell, a detachable cartridge cover is arranged at the top of the filter cartridge, a plug is arranged at the bottom of the cartridge cover, and a composite filter element is arranged in the cartridge cover; the heat dissipation system comprises a cylindrical heat dissipation cylinder made of a heat conduction material, the axial center cavity and the outer wall of the heat dissipation cylinder are both provided with heat dissipation fins, a plurality of flow dividing channels are distributed in the circumferential direction, and the heat dissipation cylinder is connected with a heat dissipation fan; the circulating pipeline comprises a first oil conveying pipe communicated with the oil pump and the filter cartridge. The composite filter element capable of removing moisture and impurities in the insulating oil is adopted, the insulating oil is circularly filtered, the performance of the insulating oil is kept, stable operation of the transformer is kept, the heat dissipation system capable of conducting heat of the insulating oil is arranged, and the heat dissipation efficiency is further improved.

Description

Technical Field

[0001] This application relates to the field of mining transformer technology, and in particular to a mining oil-immersed transformer with a filter structure. Background Technology

[0002] An oil-immersed transformer is an electrical device that uses transformer oil as the primary insulating and cooling medium. Its core structure includes the transformer body (containing the core and windings) and the oil tank. Transformer oil not only provides insulation protection but also removes heat through natural or forced circulation (such as air cooling, water cooling, or oil pump circulation), ensuring stable operation of the equipment under high loads. Due to its heat dissipation efficiency, cost advantage, and environmental adaptability, oil-immersed transformers have become indispensable power equipment in the mining industry, especially excelling in ground power supply, large machinery drives, and special environments (such as offshore or highly corrosive areas).

[0003] Without a filtration system and an active cooling system, the transformer oil in an oil-immersed transformer will gradually deteriorate over long-term operation due to oxidation, moisture, or the intrusion of impurities (such as increased acid value and decreased insulation performance). Without a filtration system (such as an oil purification device or regeneration system), impurities in the oil (such as oxidation products, moisture, and particulate matter) cannot be effectively removed, leading to decreased insulation performance and potentially causing partial discharge or short-circuit faults. Summary of the Invention

[0004] The purpose of this application is to provide a mining oil-immersed transformer with a filtration structure to solve the above-mentioned problems. It uses a filter element that can remove moisture and impurities from the insulating oil, and maintains the performance of the insulating oil and keeps the transformer running stably by circulating and filtering the insulating oil.

[0005] This application achieves the above objectives through the following technical solutions:

[0006] A mining oil-immersed transformer with a filtration structure includes: a transformer housing, an oil pump installed inside the housing, a filtration system, a heat dissipation system, and a circulation pipeline;

[0007] The filtration system includes a filter cartridge located outside the transformer housing. The filter cartridge has a removable cover at the top and a plug at the bottom. A composite filter element is installed inside the cover.

[0008] The heat dissipation system includes a cylindrical heat dissipation cylinder made of thermally conductive material, with heat dissipation fins on its axial central cavity and outer wall, and multiple diversion channels distributed circumferentially. The heat dissipation cylinder is connected to a cooling fan.

[0009] The circulation pipeline includes: a first oil supply pipe connecting the oil pump and the filter cartridge; a second oil supply pipe passing through the bottom of the filter cartridge and extending to the hollow cavity of the composite filter element; a distributor and multiple distributor pipes connecting the second oil supply pipe and the heat sink; and a collector and collector pipe connecting the heat sink and the third oil supply pipe.

[0010] Furthermore, the top of the cylinder cover is provided with an external hexagonal screw head, and the outer wall of the top of the filter cylinder is connected to the cylinder cover by threads. The plug and the end of the second oil delivery pipe form a two-way sealing structure for the composite filter element.

[0011] Furthermore, the second oil pipeline integrates a temperature sensor and an oil quality sensor, with the sensor signal output connected to the control terminal.

[0012] Furthermore, the diversion channel is arranged along the axial direction of the heat sink, and its two ends can connect the diversion pipe and the collector pipe.

[0013] Furthermore, the portion of the third oil pipeline extending into the transformer housing is equipped with an oil delivery hole.

[0014] Furthermore, the composite filter element includes a coalescing filter element layer and a fiber filter element layer.

[0015] Furthermore, pads are installed on both sides of the third oil pipeline.

[0016] Compared to existing technologies, this application uses a composite filter element that can remove moisture and impurities from insulating oil. By circulating and filtering the insulating oil, the performance of the insulating oil is maintained, ensuring stable operation of the transformer. It also has a heat dissipation system that can conduct heat from the insulating oil, further improving heat dissipation efficiency. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present application and form part of the specification. They are used together with the following detailed description to explain the present application, but do not constitute a limitation thereof. In the drawings:

[0018] Figure 1 This is a schematic diagram of the structure of this application;

[0019] Figure 2 This is a schematic diagram of the internal structure of the transformer housing in this application;

[0020] Figure 3 This is a schematic diagram of the heat dissipation system structure of this application.

[0021] The annotations in the attached figures are explained as follows:

[0022] 1. Transformer housing; 2. Oil pump; 3. First oil delivery pipe; 4. Filter cylinder; 5. Cylinder cover; 6. External hexagonal screw head; 7. Plug; 8. Coalescing filter element layer; 9. Fiber filter element layer; 10. Second oil delivery pipe; 11. Heat sink; 12. Diverter channel; 13. Heat sink fins; 14. Diverter; 15. Diverter pipe; 16. Third oil delivery pipe; 17. Collector; 18. Collector pipe; 19. Oil delivery hole; 20. Pad; 21. Temperature sensor; 22. Oil quality sensor; 23. Cooling fan. Detailed Implementation

[0023] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0024] In the description of this application, it should be understood that the terms "upper," "lower," "front," "back," "left," "right," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the appendix. Figure 1 This description is provided for the convenience of describing this application and for the purpose of simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0025] like Figure 1-3 As shown, a mining oil-immersed transformer with a filtration structure includes: a transformer housing 1, an oil pump 2 installed inside the housing, a filtration system, a heat dissipation system, and a circulation pipeline.

[0026] The filtration system includes a filter cylinder 4 disposed outside the transformer housing 1. The filter cylinder 4 has a removable cover 5 at the top and a plug 7 at the bottom. A composite filter element is installed inside the filter cylinder 4.

[0027] The heat dissipation system includes a cylindrical heat dissipation cylinder 11 made of thermally conductive material, with heat dissipation fins 13 provided in its axial central cavity and outer wall, and multiple diversion channels 12 distributed circumferentially. The heat dissipation cylinder 11 is connected to a cooling fan 23.

[0028] The circulation pipeline includes: a first oil supply pipe 3 connecting the oil pump 2 and the filter cylinder 4; a second oil supply pipe 10 passing through the bottom of the filter cylinder 4 and extending to the hollow cavity of the composite filter element; a distributor 14 and multiple distributor pipes 15 connecting the second oil supply pipe 10 and the heat sink 11; and a collector 17 and a collector pipe 18 connecting the heat sink 11 and the third oil supply pipe 16.

[0029] Specifically, the transformer body is not shown in the attached drawings. The transformer casing 1 is a prior art product and is part of the transformer. The heat sink 11 can conduct heat from the passing insulating oil to allow the heat sink 13 to dissipate heat. The cooling fan 23 is coaxially mounted inside the heat sink 11 via a bracket to generate airflow to remove heat. The filtered insulating oil circulates through the second oil supply pipe 10, the shunt 14, the shunt pipe 15, the shunt channel 12, the collector pipe 18, the collector 17, and the third oil supply pipe 16.

[0030] Furthermore, the top of the cylinder cover 5 is provided with an external hexagonal screw head 6, the top outer wall of the filter cylinder 4 is connected to the cylinder cover 5 by threads, and the plug 7 and the end of the second oil supply pipe 10 form a two-way sealing structure for the composite filter element.

[0031] Specifically, the cap 5 is screwed on by turning the hexagonal screw head 6 with a wrench, which facilitates disassembly and allows for replacement of the filter element.

[0032] Furthermore, the second oil pipeline 10 integrates a temperature sensor 21 and an oil quality sensor 22. The sensor signal output terminals are connected to the control terminal, enabling real-time monitoring of the insulating oil's condition.

[0033] Furthermore, the diversion channel 12 is arranged along the axial direction of the heat sink 11, and its two ends can connect the diversion pipe 15 and the collector pipe 18.

[0034] Specifically, the insulating oil is diverted through the shunt pipe 15 and then enters each shunt channel 12, improving the efficiency of heat transfer.

[0035] Furthermore, the portion of the third oil pipe 16 extending into the transformer housing 1 is provided with an oil delivery hole 19, which enables the filtered and cooled insulating oil to be delivered to various locations inside the transformer.

[0036] Furthermore, the composite filter element includes a coalescing filter element layer 8 and a fiber filter element layer 9, which can filter impurities such as moisture and particulate matter.

[0037] Furthermore, pads 20 are provided on both sides of the third oil pipeline 16 to avoid transformer components and prevent them from contacting the third oil pipeline 16 and causing blockage of the oil delivery hole 19.

[0038] Specifically, the top outer wall of the filter cylinder 4 is provided with an external thread that matches the internal thread of the cylinder cover 5, thereby realizing the detachable connection between the filter cylinder 4 and the filter element. The filter element is cylindrical, and the outer diameter of the plug 7 and the second oil supply pipe 10 matches the cavity of the filter element. The distributor 14 and the collector 17 are hollow structures, and the insulating oil can flow inside them, thereby being transported to the distributor pipe 15 and receiving the insulating oil sent in by the collector pipe 18. The heat dissipation cylinder 11 is made of thermally conductive material, and heat dissipation fins 13 are provided in the central cavity and on the outer wall of the heat dissipation cylinder 11. Starting the cooling fan 23 can generate airflow to accelerate heat dissipation. The oil supply holes 19 are distributed along the third oil supply pipe 16 that penetrates into the transformer housing 1, so as to send the cooled insulating oil to various parts of the transformer housing 1.

[0039] In the above structure, the insulating oil can cool the internal components of the transformer housing 1. The oil pump 2 is started to draw the insulating oil from the transformer housing 1, which is sent into the filter cylinder 4 through the first oil supply pipe 3. Then, it passes through the coalescing filter layer 8 to filter out moisture, and then through the fiber filter layer 9 to filter out particulate matter. The filtered insulating oil enters the second oil supply pipe 10 through the hollow part of the filter element, and then enters the distributor 14. It then enters each distributor channel 12 through the distributor pipe 15. The heat is conducted to the heat dissipation cylinder 11, and the heat dissipation fins 13 improve the heat dissipation efficiency. At the same time, the cooling fan 23 can be started to further improve the heat dissipation efficiency. The insulating oil passing through the distributor channel 12 enters the collector pipe 18 and the collector 17, and finally enters the third oil supply pipe 16. It diffuses into the transformer housing 1 through the oil supply hole 19 to cool the internal components of the transformer housing 1.

[0040] The foregoing has shown and described the basic principles, main features, and advantages of this application. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this application. Various changes and modifications can be made to this application without departing from the spirit and scope thereof, and all such changes and modifications fall within the scope of this application as claimed. The scope of protection of this application is defined by the appended claims and their equivalents.

Claims

1. A mineral oil immersed transformer for use in a mine having a filtering structure, characterized in that, The utility model relates to a kind of transformer oil filter, including: Transformer housing (1), oil pump (2) arranged in the shell, filter system, heat dissipation system and circulation pipeline are set; The filter system includes filter cartridge (4) arranged outside transformer housing (1), the top of the filter cartridge (4) is provided with detachable cartridge cap (5), the bottom of the cartridge cap (5) is provided with plug (7), and composite filter element is arranged inside; The heat dissipation system includes cylindrical heat dissipation cylinder (11) made of temperature-conducting material, the axial center cavity and outer wall are provided with cooling fins (13), and a plurality of shunt passages (12) are distributed in the circumferential direction, and the heat dissipation cylinder (11) is connected with cooling fan (23); The circulation pipeline includes: first oil pipe (3) connecting oil pump (2) and filter cartridge (4), second oil pipe (10) penetrating into the hollow cavity of composite filter element from the bottom of filter cartridge (4), shunt (14) and a plurality of shunt pipes (15) connecting second oil pipe (10) and heat dissipation cylinder (11), manifold (18) and flow collector (17) connecting heat dissipation cylinder (11) and third oil pipe (16).

2. The oil-immersed mine transformer with filtering structure according to claim 1, characterized in that: The top of the cartridge cap (5) is provided with an outer hexagonal screw head (6), and the top outer wall of the filter cartridge (4) is connected with the cartridge cap (5) by threads, and the plug (7) and the end of the second oil pipe (10) form a bidirectional sealing structure for the composite filter element.

3. The oil-immersed mine transformer with filtering structure according to claim 1, characterized in that: Temperature sensor (21) and oil quality sensor (22) are integrated on second oil pipe (10), and sensor signal output end is connected to control terminal.

4. The oil-immersed mine transformer with filtering structure according to claim 1, characterized in that: The shunt passages (12) are arranged in the axial direction of the heat dissipation cylinder (11), and the two ends can communicate with the shunt pipes (15) and the manifold (18).

5. The oil-immersed mine transformer with filtering structure according to claim 1, characterized in that: The part of the third oil pipe (16) extending into the transformer housing (1) is provided with an oil inlet (19).

6. The oil-immersed mine transformer with filtering structure according to claim 1 or 2, characterized in that: The composite filter element includes coalescing filter element layer (8) and fiber filter element layer (9).

7. The oil-immersed mine transformer with filtering structure according to claim 1, characterized in that: The two sides of the third oil pipe (16) are provided with a pad (20).

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