Water-cooled oil-immersed transformer

Abstract

The utility model discloses a water-cooled oil-immersed transformer, which relates to the technical field of water-cooled oil-immersed transformers, and comprises a box body, the top of the box body is connected with a box cover through a plurality of bolts, two groups of pipelines are arranged in the box body, the surface of each pipeline is rotatably connected with a movable pipe, and the movable pipe is connected with the box cover through a plurality of bolts. And the pipeline and the movable pipe are connected through a rotary sealing ring. Cooling water flows in the pipeline to drive the fan blades to rotate, so that the movable pipe and the movable plate are synchronously driven to rotate, oil in the box body can be disturbed, the contact area between the oil and the cooling water is conveniently increased, the heat exchange efficiency is improved, the heat dissipation effect is enhanced, and the service life of the oil tank is prolonged. Meanwhile, due to the staggered design of the movable plates, the stirring range of oil in the box body can be increased, heat can be evenly distributed into the whole oil tank from a high-temperature area in the transformer, and therefore the phenomenon of local overheating is prevented, and the service life of the water-cooling oil-immersed transformer can be prolonged.

Description

Technical Field

[0001] This utility model relates to the technical field of water-cooled oil-immersed transformers, specifically a water-cooled oil-immersed transformer. Background Technology

[0002] An oil-immersed transformer is a voltage conversion device that uses oil cooling technology to minimize the transformer temperature. It is also an important piece of equipment in the power supply and distribution systems of industrial and mining enterprises and civil buildings. It works on the principle of electromagnetic induction. When the primary winding is connected to an AC power source, an alternating magnetic flux is generated in the iron core, which in turn induces an electromotive force in the secondary winding. By adjusting the turns ratio of the primary and secondary windings, the voltage can be increased or decreased, thereby realizing the transmission and distribution of electrical energy.

[0003] There are many types of oil-immersed transformers, such as water-cooled oil-immersed transformers, which are a special type of oil-immersed transformer. The difference lies in the use of water cooling technology. During operation, cooling water flows into the water cooling device through water pipes to cool the high-temperature transformer oil, and then flows back to the water cooling device through water pipes to form a cycle. This cooling method significantly improves the heat dissipation efficiency of water-cooled oil-immersed transformers, enabling them to better adapt to high-load and high-temperature working environments.

[0004] When using a water-cooled oil-immersed transformer, first check the equipment to ensure it can be used normally. Then start the transformer's oil pump, observe the oil flow to ensure normal oil circulation, and then start the water pump of the water cooling system to check whether the flow and pressure of the cooling water are normal. After confirming that there are no abnormal sounds or vibrations from the transformer, gradually put it into operation.

[0005] However, during use, because the water cooling device flows through a fixed location, and the heat generated by the insulating oil varies depending on its position in the oil tank, it cannot effectively reduce the overall temperature, thus affecting the heat dissipation efficiency of the water-cooled oil-immersed transformer and reducing its service life. Utility Model Content

[0006] Based on this, the purpose of this utility model is to provide a water-cooled oil-immersed transformer to solve the technical problem that, during use, the water cooling device flows through a fixed location, and the heat generated by the insulating oil varies depending on its position in the oil tank, which makes it impossible to reduce the overall temperature, thus affecting the heat dissipation efficiency of the water-cooled oil-immersed transformer and reducing its service life.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a water-cooled oil-immersed transformer, including a housing, the top of which is connected to a housing cover by several bolts, two sets of pipes are arranged inside the housing, each pipe has a movable tube rotatably connected to its surface, and the pipes and movable tubes are connected by a rotating sealing ring, each movable tube has several slots on its surface, each slot has a movable plate connected to it by a stud, each movable tube has a rotating shaft fixedly connected to it by a connecting rod, each rotating shaft has several fan blades fixedly connected to its surface, and the movable tubes on the surface of each set of pipes are designed to be staggered.

[0008] By adopting the above technical solution, cooling water is supplied to the pipeline to cool the oil in the tank. At the same time, the flow of cooling water drives the fan blades to rotate, which in turn drives the movable pipes to rotate. This allows the movable plates installed on the surface of each movable pipe to rotate inside the tank, which can agitate the oil in the tank, thereby increasing the contact area between the oil and the cooling water, improving heat exchange efficiency, and enhancing heat dissipation. At the same time, the staggered design of the movable plates can increase the agitation range of the oil in the tank, distributing heat evenly from the high-temperature area inside the transformer to the entire oil tank, thus preventing local overheating and protecting the transformer's insulation materials and windings. Therefore, it can extend the service life of the water-cooled oil-immersed transformer.

[0009] The present invention is further configured such that an oil injection pipe extends through the top of the tank cover, a top cover is threadedly connected to the top of the oil injection pipe, and a filter screen is installed inside the oil injection pipe.

[0010] By adopting the above technical solutions, the design of the oil injection pipe facilitates the replenishment of oil into the tank, while the design of the filter screen facilitates the filtration of the oil entering the tank, thereby reducing impurities and particles in the oil, avoiding malfunctions caused by impurities and particles, and extending the service life of the transformer.

[0011] The present invention is further configured such that the box cover has a plurality of vent holes, the top of the vent holes is movably connected to a fixing block that fits with the vent holes, the top of the box cover is rotatably connected to a connecting shaft, and the fixing block is fixedly connected to the surface of the connecting shaft.

[0012] By adopting the above technical solution, rotating the connecting shaft and the fixing block, so that the fixing block does not block the exhaust hole, the gas generated during the operation of the transformer can be discharged, avoiding safety problems caused by excessive internal pressure of the tank. After the gas is discharged, the fixing block can be rotated to block the exhaust hole, so as not to affect the use of the transformer.

[0013] The present invention is further configured such that a plurality of heat sinks are provided on both sides of the housing, and each heat sink is provided with a groove.

[0014] By adopting the above technical solution, the heat sink design can increase the heat dissipation area of ​​the transformer, thereby improving the heat dissipation efficiency. At the same time, the design of the groove in the heat sink can allow the oil to flow in the groove when the moving plate disturbs the oil, thereby better dissipating heat from the oil-immersed transformer and improving the heat dissipation efficiency.

[0015] The present invention is further configured such that a water pump is installed on one side of the box and a water tank is installed on the other side of the box, one end of each pipe passes through one side of the box and extends to the outside to connect to the output end of the water pump, and the other end of the pipe passes through the other side of the box and extends to the outside to connect to the water tank, and a connecting pipe is provided at one end of the water tank.

[0016] By adopting the above technical solution, the design of the water pump and water tank can form a closed cooling water circulation system. Therefore, when the water pump delivers cooling water into the pipe, it flows through the pipe and then into the water tank, heat exchange can be carried out inside the oil-immersed transformer. At the same time, the connecting pipe can centrally treat the cooling water flowing into the water tank, so that it can be reused after cooling. This design can avoid resource waste while improving heat dissipation efficiency.

[0017] The present invention is further configured such that the top and bottom of the groove are both configured as inclined surfaces, the top of the groove is inclined inward and the bottom of the groove is inclined outward.

[0018] By adopting the above technical solution, the inclined structure at the top and bottom of the groove can allow the oil entering the groove to flow out through the inclined structure at the bottom when the movable plate disturbs the oil in the box, and then allow the oil in the box to flow in through the top of the groove. This can play a guiding role, making it easier to replace different oils into the heat sink, thus improving heat dissipation.

[0019] The present invention is further configured such that each group of pipes is connected to the housing via a fixing ring.

[0020] By adopting the above technical solutions, the pipeline can be provided with certain support, thereby increasing the stability and reliability of the pipeline and reducing the risk of damage to the pipeline due to vibration or external forces.

[0021] In summary, the present invention has the following main advantages:

[0022] This invention utilizes the flow of cooling water within the pipes to drive the fan blades to rotate, which in turn drives the movable pipe and movable plate to rotate simultaneously. This agitates the oil within the tank, increasing the contact area between the oil and cooling water, thereby improving heat exchange efficiency and enhancing heat dissipation. Furthermore, the staggered design of the movable plate increases the range of oil agitation within the tank, distributing heat evenly from the high-temperature areas inside the transformer to the entire tank, preventing localized overheating and protecting the transformer's insulation materials and windings. Therefore, it can extend the service life of water-cooled oil-immersed transformers. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0024] Figure 2 This is a three-dimensional internal structural diagram of the present invention;

[0025] Figure 3 This is a three-dimensional structural cross-sectional view of the present invention;

[0026] Figure 4 Here are detailed drawings of the water-cooling structure of this utility model;

[0027] Figure 5 This is a detailed diagram of the heat sink structure of this utility model;

[0028] Figure 6 This utility model Figure 5 Enlarged view of the structure at point A in the middle.

[0029] In the diagram: 1. Housing; 2. Bolt; 3. Housing cover; 4. Oil injection pipe; 5. Top cover; 6. Filter screen; 7. Vent hole; 8. Connecting shaft; 9. Fixing block; 10. Pipe; 11. Fixing ring; 12. Movable pipe; 13. Rotating sealing ring; 14. Connecting rod; 15. Rotating shaft; 16. Fan blade; 17. Slot; 18. Movable plate; 19. Stud; 20. Water pump; 21. Water tank; 22. Connecting pipe; 23. Heat sink; 24. Groove. Detailed Implementation

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0031] The embodiments of this utility model will be described below based on its overall structure.

[0032] A water-cooled oil-immersed transformer, such as Figure 1-6As shown, the transformer includes a housing 1. The top of the housing 1 is connected to a cover 3 by several bolts 2, which can fix the position of the cover 3. An oil injection pipe 4 passes through the top of the cover 3, and a top cover 5 is threaded to the top of the oil injection pipe 4. Tightening the top cover 5 opens the oil injection pipe 4, allowing external oil to enter the housing 1 through the oil injection pipe 4. The top cover 5 ensures that the oil injection pipe 4 is normally closed, preventing external impurities from entering the housing 1 and affecting the use of the water-cooled oil-immersed transformer. A filter screen 6 is installed inside the oil injection pipe 4 to filter the oil entering the housing 1, thereby reducing impurities and particles in the oil, preventing malfunctions caused by impurities and particles, and extending the service life of the water-cooled oil-immersed transformer.

[0033] Meanwhile, several vent holes 7 are provided on the tank cover 3. These vent holes 7 allow gas generated inside the tank 1 due to the operation of the water-cooled oil-immersed transformer to be discharged, preventing safety issues caused by excessive internal pressure. A fixing block 9 is movably connected to the top of each vent hole 7, and a rubber layer is provided at the connection between the fixing block 9 and the vent hole 7 to enhance sealing. A connecting shaft 8 is rotatably connected to the top of the tank cover 3, and a damping structure is provided between the tank cover 3 and the connecting shaft 8. The fixing block 9 is fixedly connected to the surface of the connecting shaft 8. Therefore, rotating the connecting shaft 8 synchronously drives the fixing block 9 to rotate. When the fixing block 9 is misaligned with the vent hole 7, the vent hole 7 is not blocked, allowing gas to be discharged from the tank 1. Conversely, when the fixing block 9 coincides with the vent hole 7, the vent hole 7 is blocked by the fixing block 9, preventing interference with the transformer's operation.

[0034] Subsequently, two sets of pipes 10 are installed inside the housing 1, and each set of pipes 10 is connected to the housing 1 via a fixing ring 11, which increases the stability and reliability of the pipes 10. A movable pipe 12 is rotatably connected to the surface of each pipe 10, and the pipe 10 and the movable pipe 12 are connected by a rotating sealing ring 13. Therefore, rotating the sealing ring 13 allows the movable pipe 12 to rotate on the surface of the pipe 10 without causing leakage of the cooling water inside the pipe 10. Several slots 17 are provided on the surface of each movable pipe 12, and a movable plate 18 is connected to each slot 17 via a stud 19. The movable plate 18 can be installed and disassembled, allowing for maintenance and replacement. Each movable tube 12 is fixedly connected to a rotating shaft 15 via a connecting rod 14. Several fan blades 16 are fixedly connected to the surface of each rotating shaft 15. Therefore, when cooling water flows in the pipe 10, the movable tube 12 can be rotated by the fan blades 16, rotating shaft 15, and connecting rod 14, thereby synchronously rotating the movable plate 18. This facilitates increased disturbance to the oil. The movable tubes 12 on the surface of each set of pipes 10 are staggered, thus increasing the range of oil disturbance caused by the movable plate 18 on the surface of the movable tube 12.

[0035] A water pump 20 is installed on one side of the housing 1, and a water tank 21 is installed on the other side of the housing 1. The water pump 20 and the water tank 21 can form a closed loop of cooling water in the pipes 10. One end of each pipe 10 passes through one side of the housing 1 and extends to the outside to connect with the output end of the water pump 20. The other end of the pipe 10 passes through the other side of the housing 1 and extends to the outside to connect with the water tank 21. When cooling water is simultaneously pumped into multiple pipes 10 by the water pump 20, the cooling water can flow in the pipes 10 and finally flow into the water tank 21. The flow of cooling water can cool the oil in the housing 1. A connecting pipe 22 is provided at one end of the water tank 21, so that the cooling water stored in the water tank 21 can be discharged through the connecting pipe 22, so that it can be reused after cooling, thereby avoiding resource waste.

[0036] In this embodiment, cooling water can be pumped into the pipe 10 by the water pump 20. The flow of cooling water can drive the fan blades 16 and the movable pipes 12 to rotate, so that the movable plates 18 installed on the surface of each movable pipe 12 can rotate inside the tank 1. This can disturb the oil in the tank 1, which can increase the contact area between the oil and the cooling water, thereby improving the heat exchange efficiency and enhancing the heat dissipation effect. At the same time, the staggered design of the movable plates 18 can increase the disturbance range of the oil in the tank 1, and distribute the heat evenly from the high-temperature area inside the transformer to the entire oil tank, thereby preventing the occurrence of local overheating, protecting the insulation materials and windings of the transformer, and thus extending the service life of the water-cooled oil-immersed transformer.

[0037] Furthermore, by providing several heat sinks 23 on both sides of the housing 1, the contact area between the housing 1 and the cavity can be increased, thereby increasing the heat dissipation area of ​​the transformer and improving the heat dissipation efficiency. At the same time, a groove 24 is provided in each heat sink 23, and the top and bottom of the groove 24 are both set as inclined structures. The top of the groove 24 is inclined inward and the bottom of the groove 24 is inclined outward. The inclined structure at the top and bottom of the groove 24 can act as a conductor. When the multiple movable plates 18 disturb the oil in the housing 1, the oil stored in the groove 24 can flow into the housing 1 through its bottom inclined structure, and the oil in the housing 1 can flow into the groove 24 through the inclined structure at the top of the groove 24. This facilitates the replacement of different oils into the groove 24, thereby improving the heat dissipation efficiency.

[0038] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A water-cooled oil-immersed transformer, comprising a housing (1), wherein a housing cover (3) is connected to the top of the housing (1) by a plurality of bolts (2), characterized in that: The housing (1) is provided with two sets of pipes (10). Each pipe (10) has a movable tube (12) rotatably connected to its surface. The pipes (10) and the movable tubes (12) are connected by a rotating sealing ring (13). Each movable tube (12) has several slots (17) on its surface. Each slot (17) is connected to a movable plate (18) by a stud (19). Each movable tube (12) is fixedly connected to a rotating shaft (15) by a connecting rod (14). Each rotating shaft (15) has several fan blades (16) fixedly connected to its surface. The movable tubes (12) on the surface of each set of pipes (10) are designed to be staggered.

2. The water-cooled oil-immersed transformer according to claim 1, characterized in that: An oil injection pipe (4) is threaded through the top of the cover (3), and a top cover (5) is threaded to the top of the oil injection pipe (4). A filter screen (6) is installed inside the oil injection pipe (4).

3. The water-cooled oil-immersed transformer according to claim 1, characterized in that: The box cover (3) is provided with a number of vent holes (7). The top of the vent holes (7) is movably connected to a fixing block (9) that matches the vent holes (7). The top of the box cover (3) is rotatably connected to a connecting shaft (8), and the fixing block (9) is fixedly connected to the surface of the connecting shaft (8).

4. The water-cooled oil-immersed transformer according to claim 1, characterized in that: The box (1) has several heat sinks (23) on both sides, and each heat sink (23) has a groove (24) inside.

5. The water-cooled oil-immersed transformer according to claim 1, characterized in that: A water pump (20) is installed on one side of the box (1), and a water tank (21) is installed on the other side of the box (1). One end of each pipe (10) passes through one side of the box (1) and extends to the outside to connect to the output end of the water pump (20). The other end of the pipe (10) passes through the other side of the box (1) and extends to the outside to connect with the water tank (21). A connecting pipe (22) is provided at one end of the water tank (21).

6. The water-cooled oil-immersed transformer according to claim 4, characterized in that: The top and bottom of the groove (24) are both set as inclined structures, with the top of the groove (24) inclined inward and the bottom of the groove (24) inclined outward.

7. The water-cooled oil-immersed transformer according to claim 1, characterized in that: Each of the pipes (10) is connected to the housing (1) via a retaining ring (11).

Images