An explosion-proof oil-immersed transformer

Abstract

The present invention discloses an explosion-proof oil-immersed transformer, comprising: an oil-immersed transformer housing, and an oil conservator is fixed on the oil-immersed transformer housing; the oil conservator is communicated with the oil-immersed transformer housing through an inlet pipe and an outlet pipe; a check valve is connected to each of the inlet pipe and the outlet pipe; a filtering assembly is connected in series to the inlet pipe, and a buffer device is fixedly connected to the oil-immersed transformer housing. By the cooperation of the oil conservator and the oil-immersed transformer housing, the present invention reduces the phenomenon that the tap changer is exposed due to the oil level drop, resulting in the burnout of the tap changer. The filtering assembly filters impurities and sediments, improving the service life. The buffer device reduces the rigid impact generated by the working vibration of the oil-immersed transformer, reducing the phenomenon of damage to the oil-immersed transformer.

Description

Technical Field

[0001] The present invention relates to a transformer, and in particular to an explosion-proof oil-immersed transformer. Background Art

[0002] The oil-immersed transformer is often a fully enclosed box. When the product encounters hot weather or heavy load, thermal expansion and contraction may occur, causing the box to expand. As a result, the oil level inside the box drops, exposing the tap changer outside the oil, leading to the burnout of the tap changer.

[0003] At the same time, after the oil-immersed transformer is used for a long time, impurities and sediments will appear in the internal oil, affecting the service life of the transformer.

[0004] In the prior art, the oil-immersed transformers are all directly fixedly connected. When local vibrations occur outside or the oil-immersed transformer vibrates during operation, resulting in rigid impacts on the oil-immersed transformer, the oil-immersed transformer will be damaged after a long time. Summary of the Invention

[0005] The purpose of the present invention is to provide an explosion-proof oil-immersed transformer that can effectively solve the above technical problems.

[0006] To achieve the purpose of the present invention, the following technical solution is adopted: an explosion-proof oil-immersed transformer, comprising: an oil-immersed transformer housing, on which an oil conservator is fixed; the oil conservator is communicated with the oil-immersed transformer housing through an inlet pipe and an outlet pipe; a check valve is connected to each of the inlet pipe and the outlet pipe; a filtering assembly is connected in series to the inlet pipe, and a buffer device is fixedly connected to the oil-immersed transformer housing.

[0007] Preferably, the filtering assembly includes: a filter housing connected in series to the inlet pipe, the filter housing is provided with a filtering chamber; a rotating column is rotatably arranged in the filtering chamber, the rotating column is provided with two liquid inlet ports communicated with the inlet pipe, and the two liquid inlet ports are coaxially arranged; a filter screen is arranged between the two liquid inlet ports, the filter screen is provided with a guiding portion, and the filter screen is provided with a slider portion cooperating with the rotating column; the filtering chamber is sealed by a sealing plate; the sealing plate is provided with a locking groove cooperating with the guiding portion.

[0008] Preferably, the filter screen is provided with a residue chamber and a rotating portion.

[0009] Preferably, the buffer device includes: a first buffer assembly and a second buffer assembly; the first buffer assembly has a buffer housing; a buffer block is slidably arranged in the buffer housing, the buffer block is fixedly connected to the oil-immersed transformer housing, and a first spring is arranged between the buffer block and the buffer housing.

[0010] Preferably, the buffer block is provided with two limiting parts, and the buffer shell is provided with buffer grooves matching with the limiting parts; directly above the limiting parts, there is a rectangular shell which is sealed by a cover plate; between the rectangular shell and the cover plate, two locking blocks are slidably arranged, and the locking blocks penetrate through the cover plate and are provided with two pressing parts; the buffer shell is provided with a plurality of rectangular grooves matching with the locking blocks, and the plurality of rectangular grooves are arranged along the length direction of the buffer groove; a second spring is arranged between the two locking blocks.

[0011] Preferably, the second buffer assembly includes: a positioning plate fixed to the lower surface of the buffer shell, the positioning plate is fixedly connected with a limiting plate, a sphere is rotatably arranged between the positioning plate and the limiting plate, the sphere penetrates through the limiting plate and cooperates with a reset plate, the reset plate is provided with an annular rib, and a plurality of tension springs are connected between the annular rib and the limiting plate.

[0012] Preferably, the outer shell of the oil-immersed transformer is provided with radiating fins.

[0013] Preferably, a pressure induction lamp is fixed to the outer shell of the oil-immersed transformer.

[0014] Preferably, an oil level display block is fixed to the oil conservator.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. By the cooperation of the oil conservator and the outer shell of the oil-immersed transformer, the phenomenon that the tap changer is exposed due to the oil level drop and the tap changer is burned out is reduced. The filtering component filters impurities and sediments, improving the service life. The buffer device reduces the rigid impact generated by the working vibration of the oil-immersed transformer, reducing the phenomenon of damage to the oil-immersed transformer.

[0017] 2. The pressure induction lamp is convenient for detecting the pressure inside the outer shell of the oil-immersed transformer, improving the safety of product use.

[0018] 3. The oil level display block detects the oil level height in the oil conservator and the oil-immersed transformer in real time, improving the service life of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments.

[0020] Figure 1 It is a schematic diagram of the overall structure of the explosion-proof oil-immersed transformer in the embodiment of the present invention;

[0021] Figure 2 It is a partial enlarged view at A of the explosion-proof oil-immersed transformer in the embodiment of the present invention;

[0022] Figure 3Partial schematic diagram of the explosion-proof oil-immersed transformer in the embodiment of the present invention;

[0023] Figure 4 Explosion diagram of the filter assembly of the explosion-proof oil-immersed transformer in the embodiment of the present invention;

[0024] Figure 5 Explosion diagram of the overall structure of the buffer device of the explosion-proof oil-immersed transformer in the embodiment of the present invention.

[0025] Description of the numbers in the figure

[0026] 1. Shell of oil-immersed transformer 2. Conservator 3. Inlet pipe 4. Outlet pipe 5. Filter shell 6. Filter chamber 7. Rotating column 8. Liquid inlet 9. Filter screen 10. Guide part 11. Slide block part 12. Sealing plate 13. Locking groove 14. Residue chamber 15. Rotating part 16. Buffer shell 17. Buffer block 19. First spring 21. Buffer groove 22. Rectangular shell 23. Cover plate 24. Locking block 25. Rectangular groove 26. Second spring 27. Positioning plate 28. Limiting plate 29. Sphere 30. Reset plate 31. Tension spring 32. Radiator fin 33. Pressure induction lamp 34. Oil level display block. Detailed implementation manners

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention.

[0028] As Figure 1 shown, an explosion-proof oil-immersed transformer includes: a shell 1 of the oil-immersed transformer, and the shell 1 of the oil-immersed transformer is provided with radiator fins 32, and the radiator fins 32 reduce the temperature when the oil-immersed transformer is working. A conservator 2 is fixed to the shell 1 of the oil-immersed transformer, and the conservator 2 is communicated with the shell 1 of the oil-immersed transformer through an inlet pipe 3 and an outlet pipe 4.

[0029] One-way valves are connected in series to both the inlet pipe 3 and the outlet pipe 4. When the shell 1 of the oil-immersed transformer expands, the oil in the conservator 2 is transported into the shell 1 of the oil-immersed transformer through the inlet pipe 3 and then from the one-way valve. When the shell 1 of the oil-immersed transformer cools and contracts, the oil in the shell 1 of the oil-immersed transformer moves from the one-way valve to the conservator 2.

[0030] The conservator 2 is fixedly connected with an oil level display block 34. The oil level display block 34 is preferably made of a transparent material, which is convenient for observing the height of the oil level in the conservator 2.

[0031] As Figure 1 、 Figure 2 、 Figure 4As shown, an oil inlet pipe 3 is also connected in series with a filtering component. The filtering component includes: a filtering shell 5 connected in series with the oil inlet pipe 3, and the filtering shell 5 is provided with a filtering cavity 6. A rotating column 7 is rotatably arranged in the filtering cavity 6. The rotating column 7 is provided with two liquid inlet ports 8 communicating with the oil inlet pipe 3, and the two liquid inlet ports 8 are coaxially arranged.

[0032] A filter screen 9 is arranged between the two liquid inlet ports 8. The filter screen 9 is provided with a residue cavity 14. The filter screen 9 is provided with a slider portion 11 cooperating with the rotating column 7, and the rotating column 7 is provided with a T-shaped groove cooperating with the slider portion 11. When the slider portion 11 cooperates with the T-shaped groove, the rotating column 7 and the filter screen 9 move synchronously, and the filtering cavity 6 is sealed by a sealing plate 12.

[0033] The filter screen 9 is provided with a guiding portion 10, and the sealing plate 12 is provided with a locking groove 13 cooperating with the guiding portion 10. The locking groove 13 is specifically a 90-degree annular groove. When the guiding portion 10 disengages from the locking groove 13, the filter screen 9 can be taken out. When the guiding portion 10 rotates 90 degrees in the locking groove 13, the filter screen 9 is in a working state, and the filter screen 9 starts to filter impurities and sediments. The filter screen 9 is provided with a rotating portion 15, and the rotating portion 15 drives the filter screen 9 to rotate, and the filter screen 9 drives the rotating column 7 to rotate.

[0034] A pressure induction lamp 33 is fixed on the outer shell 1 of the oil-immersed transformer. When the filter screen 9 is blocked, the internal pressure of the outer shell 1 of the oil-immersed transformer will increase, and the pressure induction lamp 33 will flash to remind the staff to replace the filter screen 9 in time.

[0035] As Figure 1 、 Figure 5 shown, the buffer device includes: a first buffer component and a second buffer component. The first buffer component has a buffer shell 16. A buffer block 17 is slidably arranged in the buffer shell 16, and the buffer block 17 is fixedly connected to the outer shell 1 of the oil-immersed transformer.

[0036] The buffer block 17 is provided with two limiting portions, and the buffer shell 16 is provided with buffer grooves 21 cooperating with the limiting portions. A rectangular shell 22 is arranged directly above the limiting portions. The rectangular shell 22 is provided with two moving portions, and the buffer block 17 is provided with moving grooves cooperating with the moving portions. The rectangular shell 22 is sealed by a cover plate 23. Two locking blocks 24 are slidably arranged between the rectangular shell 22 and the cover plate 23, and the locking blocks 24 pass through the cover plate 23 and are provided with two pressing portions.

[0037] The buffer shell 16 is provided with a plurality of rectangular grooves 25 cooperating with the locking blocks 24, and the plurality of rectangular grooves 25 are arranged along the length direction of the buffer groove 21. A second spring 26 is arranged between the two locking blocks 24, and the second spring 26 facilitates the two locking blocks 24 to be in a locked state.

[0038] A first spring 19 is provided between the buffer block 17 and the buffer housing 16. By adjusting the height at which the locking block 24 locks with the rectangular groove 25, the compressed length of the first spring 19 is adjusted, so as to match oil-immersed transformers of different weights.

[0039] As Figure 3 , Figure 5 shown, the second buffer assembly includes: a positioning plate 27 fixed to the lower surface of the buffer housing 16, and the positioning plate 27 is fixedly connected with a limiting plate 28. A sphere 29 is rotatably provided between the positioning plate 27 and the limiting plate 28, and the sphere 29 passes through the limiting plate 28 and cooperates with a reset plate 30. The positioning plate 27 and the limiting plate 28 position the sphere 29, and the sphere 29 has a clearance fit with the positioning plate 27 and the limiting plate 28.

[0040] The reset plate 30 is provided with an annular rib, and a plurality of tension springs 31 are connected between the annular rib and the limiting plate 28. The tension springs 31 facilitate the buffer housing 16 to return to the initial position. The sphere 29 reduces the frictional force, facilitates the buffer housing 16 to drive the oil-immersed transformer back to the initial position, and reduces the damage caused by vibration to the transformer.

[0041] As Figures 1 to 5 shown, during operation, the technician places the oil-immersed transformer on the buffer block 17, and presses the locking block 24 to drive the locking block 24 to disengage from the rectangular groove 25. The rectangular housing 22 is driven to move along the buffer groove 21 until it contacts the limiting portion, and locking is achieved through the cooperation of the locking block 24 and the rectangular groove 25.

[0042] When the pressure induction lamp 33 lights up, it indicates that the filter screen 9 is blocked. By rotating the filter screen 9, the guiding portion 10 is driven to disengage from the locking groove 13, and the filter screen 9 drives the rotating column 7 to rotate. The two liquid inlet ports 8 of the rotating column 7 stop contacting the oil inlet pipe 3, and the oil stops entering the outer shell 1 of the oil-immersed transformer, and the filter screen 9 is replaced.

[0043] After the filter screen 9 is replaced, the slider portion 11 of the filter screen 9 is fitted with the rotating column 7, and the guiding portion 10 is driven to cooperate with the locking groove 13 and rotated by 90 degrees to achieve locking of the filter screen 9. After the locking is completed, the filter screen 9 starts to work. The internal pressure of the outer shell 1 of the oil-immersed transformer returns to normal, and the pressure induction lamp 33 goes out. After the oil-immersed transformer works for a period of time, the oil level will drop, and the oil level display block 34 is used to observe the oil in the oil conservator 2 and the oil-immersed transformer.

[0044] When the oil-immersed transformer vibrates during operation or is vibrated due to external factors, the first buffer assembly and the second buffer assembly start to work.

[0045] When the first buffer component is working, the oil-immersed transformer compresses the first spring 19 through the buffer block 17, and the first spring 19 drives the buffer block 17 to contact the rectangular shell 22, reducing the rigid impact in the vertical direction between the parts of the oil-immersed transformer.

[0046] When the second buffer component is working, the sphere 29 drives the buffer plate to cooperate with the reset plate 30 and returns to the initial position under the action of the tension spring 31, reducing the rigid impact between the parts of the oil-immersed transformer in the horizontal and longitudinal directions.

[0047] Various modifications to these embodiments will be obvious to those of ordinary skill in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the invention.

Claims

1. An explosion-proof oil-immersed transformer, comprising: Oil-immersed transformer housing, characterized in that an oil conservator is fixed on the oil-immersed transformer housing; the oil conservator is communicated with the oil-immersed transformer housing through an inlet pipe and an outlet pipe; one-way valves are connected to both the inlet pipe and the outlet pipe; a filtering component is connected in series to the inlet pipe, and a buffer device is fixedly connected to the oil-immersed transformer housing; The buffer device includes: a first buffer component and a second buffer component; the first buffer component has a buffer housing; a buffer block is slidably arranged in the buffer housing, the buffer block is fixedly connected to the oil-immersed transformer housing, and a first spring is arranged between the buffer block and the buffer housing; Two limiting parts are arranged on the buffer block, and buffer grooves matched with the limiting parts are arranged on the buffer housing; a rectangular housing is arranged directly above the limiting parts, and the rectangular housing is sealed by a cover plate; two locking blocks are slidably arranged between the rectangular housing and the cover plate, and two pressing parts are arranged on the locking blocks penetrating through the cover plate; a plurality of rectangular grooves matched with the locking blocks are arranged on the buffer housing, and the plurality of rectangular grooves are arranged along the length direction of the buffer groove; a second spring is arranged between the two locking blocks; The second buffer component includes: a positioning plate fixed on the lower surface of the buffer housing, the positioning plate is fixedly connected with a limiting plate, a sphere is rotatably arranged between the positioning plate and the limiting plate, the sphere penetrates through the limiting plate and is matched with a reset plate, an annular rib is arranged on the reset plate, and a plurality of tension springs are connected between the annular rib and the limiting plate; a filter housing connected in series with the inlet pipe, the filter housing is provided with a filtering cavity; a rotating column is rotatably arranged in the filtering cavity, two liquid inlet ports communicated with the inlet pipe are arranged on the rotating column, and the two liquid inlet ports are coaxially arranged; a filter screen is arranged between the two liquid inlet ports, a guiding part is arranged on the filter screen, and a sliding block part matched with the rotating column is arranged on the filter screen; the filtering cavity is sealed by a sealing plate; a locking groove matched with the guiding part is arranged on the sealing plate.

2. The explosion-proof oil-immersed transformer according to claim 1, characterized in that, A residue cavity and a rotating part are arranged on the filter screen.

3. The explosion-proof oil-immersed transformer according to claim 1, characterized in that, The oil-immersed transformer housing is provided with radiating fins.

4. The explosion-proof oil-immersed transformer according to claim 1, characterized in that, A pressure-sensing lamp is fixed on the oil-immersed transformer housing.

5. The explosion-proof oil-immersed transformer according to claim 1, characterized in that, An oil level display block is fixed on the oil conservator.

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