Oil changing structure for oil-immersed transformer

Abstract

The present invention discloses an oil-changing structure for an oil-immersed transformer, comprising a mounting base, to which a transformer housing is fixedly connected, a transformer core fixedly connected inside the transformer housing, a waste oil tank fixedly connected to the left side of the mounting base, and a circulating diversion mechanism fixedly mounted on the mounting base, the circulating diversion mechanism being in communication with the waste oil tank and the transformer housing. The invention achieves seamless connection by activating the oil-injection mechanism on the other side to inject new oil into the interior of the transformer housing, thereby ensuring the normal operation of the transformer. The new oil enters the upper part of the transformer housing and flows downward, while the waste oil at the bottom is discharged through the circulating diversion mechanism at the bottom, achieving oil replacement while ensuring the normal operation of the transformer. Thus, the device has the advantages of achieving automated replacement while ensuring the normal operation of the transformer, and realizing efficient and convenient automated replacement of transformer oil.

Description

Technical Field

[0001] The present invention relates to the technical field of transformers, and more particularly to an oil changing structure for an oil-immersed transformer. Background Art

[0002] Distribution transformers are crucial components of power supply systems in industrial and mining enterprises and residential buildings. Oil-immersed transformers are widely used due to their excellent insulation properties and low cost. However, if the oil in an oil-immersed transformer becomes contaminated or deteriorates due to moisture, it must be replaced immediately.

[0003] Currently, transformer oil replacement is generally divided into manual replacement and automatic replacement. Both of the above methods require temporary power outage and shutdown of the transformer. The operations of stopping the transformer and re-energizing it are very cumbersome, affecting the lives of residents in the surrounding area covered by the power supply, and are inefficient and inconvenient. Summary of the Invention

[0004] In view of the problems existing in the prior art, the object of the present invention is to provide an oil changing structure for an oil-immersed transformer to solve the background technical problems.

[0005] To achieve the above objectives, the present invention adopts the following technical solutions.

[0006] An oil-changing structure for an oil-immersed transformer comprises a mounting base, the mounting base being fixedly connected to a transformer housing, a transformer core being fixedly connected inside the transformer housing, a waste oil tank being fixedly connected to the left side of the mounting base, a circulating shunt mechanism being fixedly mounted on the mounting base, the circulating shunt mechanism being in communication with the waste oil tank and the transformer housing, a bracket being fixedly connected to the top of the mounting base, an oil filling mechanism being fixedly connected to the top of the bracket, the oil filling mechanism being in communication with the transformer housing, a temperature sensor and a pressure sensor being fixedly mounted inside the transformer housing, and a controller being mounted on the bracket.

[0007] As a further description of the above technical solution: the oil filling mechanism includes an oil storage tank, a first oil pump and an oil delivery pipe fitting. The bottom of the oil storage tank is fixedly connected to the bracket. The input end of the first oil pump is connected and fixed to the oil storage tank through a pipeline. The output end of the first oil pump is connected and fixed to the oil delivery pipe fitting. The other end of the oil delivery pipe fitting extends to the interior of the transformer housing.

[0008] As a further description of the above technical solution: the oil delivery pipe includes a connecting pipe and a diverter box, one end of the connecting pipe is fixedly connected to the output end of the first oil pump, and the other end of the connecting pipe is plugged and fixed to the interior of the transformer housing, and the bottom of the diverter box is provided with evenly distributed through holes.

[0009] As a further description of the above technical solution: an electronic liquid level gauge is fixedly installed inside the oil storage tank.

[0010] As a further description of the above technical solution: the circulation and diversion mechanism includes a suction pipe, a second oil pump, a filter box, a tee and two first solenoid valves, the filter box is fixedly installed to the upper left corner of the transformer housing, the second oil pump is fixedly installed on the filter box, the input end of the second oil pump is fixedly connected to the top of the suction pipe, the bottom end of the suction pipe is plugged and fixed to the bottom of the inner side of the transformer housing, the top end of the tee is plugged and fixed to the inside of the filter box, the bottom end of the tee is plugged into the inside of the waste oil tank, the horizontal end of the tee is plugged and fixed to the inside of the transformer housing, and the two first solenoid valves are respectively fixed to the horizontal end and the vertical end below the tee.

[0011] As a further description of the above technical solution: the side view cross-section of the filter box is cylindrical, the inner side of the filter box is fixedly connected to a filter core, the bottom of the filter box is fixedly connected to a waste pipe, the waste pipe is fixedly connected to a second solenoid valve, and the waste pipe is located on the back side of the filter core.

[0012] As a further description of the above technical solution: the side view cross-section of the pipette is a T-shaped tube, and both sides of the horizontal section of the pipette are provided with pipette slots.

[0013] As a further description of the above technical solution: a discharge control valve is installed on the left side of the waste oil tank.

[0014] Compared with the prior art, the advantages of the present invention are:

[0015] This solution uses a circulating shunt mechanism in conjunction with an oil filling mechanism to achieve continuous oil replacement inside the transformer, ensuring that the transformer is always filled with transformer oil. This allows the device to achieve the advantages of automated replacement while ensuring the normal operation of the transformer, achieving efficient and convenient automated replacement of transformer oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the front cross-sectional structure of the present invention;

[0017] Figure 2 It is a schematic diagram of a top cross-sectional structure of the present invention;

[0018] Figure 3 It is a schematic diagram of a partial side cross-sectional structure of the present invention;

[0019] Figure 4 It is a partial three-dimensional structural schematic diagram of the present invention.

[0020] Description of the numbers in the figure:

[0021] 1. Mounting base; 2. Transformer housing; 3. Transformer core; 4. Waste oil tank; 41. Drain control valve; 5. Circulation diversion mechanism; 51. Suction pipe; 511. Suction slot; 52. Second oil pump; 53. Filter box; 531. Filter mesh core; 532. Waste pipe; 533. Second solenoid valve; 54. Tee; 55. First solenoid valve; 6. Bracket; 7. Oil filling mechanism; 71. Oil storage tank; 711. Electronic liquid level gauge; 72. First oil pump; 73. Oil delivery pipe; 731. Connecting pipe; 732. Diverter box; 733. Through hole; 8. Temperature sensor; 9. Pressure sensor; 10. Controller. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0023] See also Figures 1 to 4 In the present invention, an oil changing structure for an oil-immersed transformer includes a mounting base 1, a transformer housing 2 is fixedly connected to the mounting base 1, a transformer core 3 is fixedly connected to the interior of the transformer housing 2, a waste oil tank 4 is fixedly connected to the left side of the mounting base 1, a circulating shunt mechanism 5 is fixedly installed on the mounting base 1, the circulating shunt mechanism 5 is communicated with the waste oil tank 4 and the transformer housing 2, a bracket 6 is fixedly connected to the top of the mounting base 1, an oil filling mechanism 7 is fixedly connected to the top of the bracket 6, the oil filling mechanism 7 is communicated with the transformer housing 2, a temperature sensor 8 and a pressure sensor 9 are fixedly installed inside the transformer housing 2, and a controller 10 is installed on the bracket 6.

[0024] In the present invention, the mounting base 1 is used as a device support, the transformer housing 2 is used as a container for the transformer core 3, and transformer oil is injected into the interior. In the transformer operating room, the circulation diversion mechanism 5 is started to extract the transformer oil inside the transformer housing 2 for filtering and circulation, and the internal impurities are filtered to ensure the oil is clean. During long-term operation, the internal temperature sensor 8 and the pressure sensor 9 detect the internal oil temperature and pressure in real time. When the internal oil temperature and pressure values ​​exceed the set values, the controller 10 receives the signal and executes the replacement program. First, the circulation reflux path of the circulation diversion mechanism 5 is closed and switched to be connected to the interior of the waste oil tank 4, so that the old liquid inside is discharged into the waste oil tank 4. At the same time, while discharging the waste oil, the oil filling mechanism 7 on the other side is started. New oil is injected into the transformer housing 2 to achieve seamless connection and ensure the normal operation of the transformer. The new oil enters the upper part of the transformer housing 2 and flows downward, while the waste oil at the bottom is discharged through the circulation and diversion mechanism 5 at the bottom, achieving oil replacement while ensuring the normal operation of the transformer. The device has the advantages of achieving automatic replacement while ensuring the normal operation of the transformer and achieving efficient and convenient automatic replacement of transformer oil, which solves the problem that transformer oil replacement in the prior art is generally divided into manual replacement and automatic replacement, and both of the above two methods require temporary power off and stop operation of the transformer, and the operations of stopping the transformer operation and re-supplying the power are very cumbersome, affecting the lives of the surrounding residents covered by the power supply, and the problem of poor efficiency and convenience.

[0025] See also Figure 1 and Figure 2 , wherein: the oil filling mechanism 7 includes an oil storage tank 71, a first oil pump 72 and an oil delivery pipe 73, the bottom of the oil storage tank 71 is fixedly connected to the bracket 6, the oil storage tank 71, the input end of the first oil pump 72 is connected and fixed to the oil storage tank 71 through a pipeline, the output end of the first oil pump 72 is connected and fixed to the oil delivery pipe 73, and the other end of the oil delivery pipe 73 extends to the interior of the transformer housing 2.

[0026] In the present invention, the transformer oil in the oil storage tank 71 is pumped out by starting the first oil pump 72 and is fed into the transformer housing 2 through the oil delivery pipe 73 to inject new oil for real-time filling.

[0027] See also Figure 1 and Figure 2 , wherein: the oil delivery pipe 73 includes a connecting pipe 731 and a diverter box 732, one end of the connecting pipe 731 is fixedly connected to the output end of the first oil pump 72, and the other end of the connecting pipe 731 is plugged and fixed to the inside of the transformer housing 2, and the bottom of the diverter box 732 is provided with evenly distributed through holes 733.

[0028] In the present invention, the through hole 733 at the bottom of the diverter box 732 connected by the connecting pipe 731 allows the injected new oil to flow downward evenly from the top and the waste oil at the bottom to be discharged downward, thereby realizing the replacement flow of new and old oils.

[0029] See also Figure 1 , wherein: an electronic liquid level gauge 711 is fixedly installed inside the oil storage tank 71.

[0030] In the present invention, the electronic liquid level meter 711 is used to detect the liquid level inside the oil storage tank 71 in real time, so as to avoid the oil inside the oil storage tank 71 being too low when adding new oil, thereby avoiding the inhalation of air.

[0031] See also Figure 1 and Figure 3 , wherein: the circulation and diversion mechanism 5 includes a suction pipe 51, a second oil pump 52, a filter box 53, a three-way pipe 54 and two first solenoid valves 55, the filter box 53 is fixedly installed to the upper left corner of the transformer housing 2, the second oil pump 52 is fixedly installed on the filter box 53, the input end of the second oil pump 52 is fixedly connected to the top of the suction pipe 51, the bottom end of the suction pipe 51 is plugged and fixed to the bottom of the inner side of the transformer housing 2, the top end of the three-way pipe 54 is plugged and fixed to the inside of the filter box 53, the bottom end of the three-way pipe 54 is plugged into the inside of the waste oil tank 4, the horizontal end of the three-way pipe 54 is plugged and fixed to the inside of the transformer housing 2, and the two first solenoid valves 55 are respectively fixed to the horizontal end and the vertical end below the three-way pipe 54.

[0032] In the present invention, by starting the second oil pump 52 and using the suction tube 51 to extract the old oil, and inject it into the filter box 53, during normal use, the first solenoid valve 55 at the vertical end of the three-way pipe 54 remains closed, and the other first solenoid valve 55 is opened to achieve normal circulation filtering. When the controller 10 starts the oil change program, the first solenoid valve 55 at the vertical end of the three-way pipe 54 remains open, and then the first solenoid valve 55 at the horizontal end is closed, so that the waste oil is discharged and no longer circulated, allowing new oil to enter smoothly for replacement.

[0033] See also Figure 1 and Figure 3 , wherein: the side view cross-section of the filter box 53 is cylindrical, the inner side of the filter box 53 is fixedly connected to a filter core 531, the bottom of the filter box 53 is fixedly connected to a waste pipe 532, the waste pipe 532 is fixedly connected to a second solenoid valve 533, and the waste pipe 532 is located on the back side of the filter core 531.

[0034] In the present invention, oil filtration is performed through the filter core 531 to filter impurities in the hydraulic oil, and then the second solenoid valve 533 is opened to discharge waste through the waste pipe 532.

[0035] See also Figure 1 and Figure 4 , wherein: the side cross-section of the liquid pipette 51 is a T-shaped tube, and liquid pipette notches 511 are provided on both sides of the horizontal section of the liquid pipette 51.

[0036] In the present invention, the T-shaped liquid suction pipe 51 cooperates with the liquid suction slot 511 to achieve efficient adsorption and discharge of the old oil inside the transformer housing 2.

[0037] See also Figure 3 , wherein: a discharge control valve 41 is installed on the left side of the waste oil tank 4.

[0038] In the present invention, the discharge control valve 41 is used to facilitate the subsequent maintenance personnel to discharge the waste oil for recovery.

[0039] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any person skilled in the art who, within the technical scope disclosed by the present invention, makes equivalent substitutions or modifications based on the technical solutions and improved concepts of the present invention shall be covered by the scope of protection of the present invention.

Claims

1. An oil-changing structure for an oil-immersed transformer, comprising a mounting seat (1), characterized in that: The mounting base (1) is fixedly connected to a transformer housing (2), the interior of the transformer housing (2) is fixedly connected to a transformer core (3), the left side of the mounting base (1) is fixedly connected to a waste oil tank (4), a circulation shunt mechanism (5) is fixedly mounted on the mounting base (1), the circulation shunt mechanism (5) is in communication with the waste oil tank (4) and the transformer housing (2), the top of the mounting base (1) is fixedly connected to a bracket (6), the top of the bracket (6) is fixedly connected to an oil injection mechanism (7), the oil injection mechanism (7) is in communication with the transformer housing (2), a temperature sensor (8) and a pressure sensor (9) are fixedly mounted inside the transformer housing (2), and a controller (10) is mounted on the bracket (6); The oil injection mechanism (7) comprises an oil storage tank (71), a first oil pump (72) and an oil delivery pipe (73); the bottom of the oil storage tank (71) is fixedly connected to the bracket (6); the input end of the oil storage tank (71) and the first oil pump (72) are connected and fixed to the oil storage tank (71) through a pipeline; the output end of the first oil pump (72) is connected and fixed to the oil delivery pipe (73); the other end of the oil delivery pipe (73) extends to the interior of the transformer housing (2); The circulation diversion mechanism (5) comprises a liquid suction pipe (51), a second oil pump (52), a filter box (53), a three-way pipe (54) and two first solenoid valves (55), wherein the filter box (53) is fixedly mounted to the upper left corner of the transformer housing (2), the second oil pump (52) is fixedly mounted on the filter box (53), the input end of the second oil pump (52) is fixedly connected to the top end of the liquid suction pipe (51), the bottom end of the liquid suction pipe (51) is plugged and fixed to the bottom inside the transformer housing (2), the top end of the three-way pipe (54) is plugged and fixed to the inside of the filter box (53), the bottom end of the three-way pipe (54) is plugged and fixed to the inside of the waste oil tank (4), the horizontal end of the three-way pipe (54) is plugged and fixed to the inside of the transformer housing (2), and the two first solenoid valves (55) are respectively fixed to the horizontal end and the vertical end below the three-way pipe (54).

2. The oil-changing structure for an oil-immersed transformer according to claim 1, characterized in that: The oil delivery pipe (73) comprises a connecting pipe (731) and a diverter box (732); one end of the connecting pipe (731) is fixedly connected to the output end of the first oil pump (72); the other end of the connecting pipe (731) is plugged and fixed to the interior of the transformer housing (2); and the bottom of the diverter box (732) is provided with evenly distributed through holes (733).

3. The oil-changing structure for an oil-immersed transformer according to claim 1, characterized in that: An electronic liquid level gauge (711) is fixedly installed inside the oil storage tank (71).

4. The oil-changing structure for an oil-immersed transformer according to claim 1, characterized in that: The side cross-section of the filter box (53) is cylindrical, the inner side of the filter box (53) is fixedly connected to a filter mesh core (531), the bottom of the filter box (53) is fixedly connected to a waste pipe (532), the waste pipe (532) is fixedly connected to a second solenoid valve (533), and the waste pipe (532) is located on the back side of the filter mesh core (531).

5. The oil-changing structure for an oil-immersed transformer according to claim 1, characterized in that: The side cross-section of the liquid suction tube (51) is a T-shaped tube, and liquid suction notches (511) are provided on both sides of the horizontal section of the liquid suction tube (51).

6. The oil-changing structure for an oil-immersed transformer according to claim 1, characterized in that: A discharge control valve (41) is installed on the left side of the waste oil tank (4).

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