An oil changing device for ultra-high voltage transformer

Abstract

The present invention belongs to the field of transformer oil change, and specifically discloses an ultra-high voltage transformer oil change device, including a transformer box, a waste oil circulation component, a liquid level sensing valve control mechanism, a new oil filling component and a one-way oil discharge mechanism, wherein the waste oil circulation component is arranged on the side of the transformer box, the liquid level sensing valve control mechanism is located in the waste oil circulation component, the new oil filling component is arranged on the waste oil circulation component, and the one-way oil discharge mechanism is arranged in the transformer box. The present invention creatively proposes a liquid level sensing valve control mechanism, which realizes the technical effect of automatically opening and closing multiple valves at the right time through liquid level sensing and a clever mechanical linkage structure without any control module, greatly saving costs and improving the promotion and practical value of this solution.

Description

Technical Field

[0001] The invention belongs to the technical field of transformer oil replacement, and in particular relates to an ultra-high voltage transformer oil replacement device. Background Art

[0002] During the long-term use of transformer oil, a lot of impurities will accumulate inside, so it needs to be replaced regularly; however, since transformer oil is mostly static during normal use, some impurities that are not easily soluble will not be suspended in the oil, but will adhere to the inner wall of the transformer or settle at the bottom. If the oil is drained directly during oil change, the impurities will be difficult to discharge. At this time, adding new transformer oil will cause the new oil to be flushed away from the deposit, and the new oil will also be contaminated quickly. Summary of the invention

[0003] In view of the above situation, in order to solve the problem that the deposited impurities are difficult to release directly, the present invention proposes an oil change method through circulating flushing of old oil. Through dynamic, full-coverage flow flushing, combined with filtration during the circulating flushing process, most of the impurities deposited and attached to the inside of the transformer box can be taken out; compared with the circulation of new oil, the oil change cost is greatly saved; not only that, in order to simplify the structure and steps during manual operation, the present invention creatively proposes a liquid level sensing valve control mechanism, which, through liquid level sensing and ingenious mechanical linkage structure, achieves the technical effect of automatic opening and closing of multiple valves at the right time without the need for any control module, greatly saving costs and improving the promotion and practical value of this solution.

[0004] The technical solution adopted by the present invention is as follows: The present invention proposes an ultra-high voltage transformer oil changing device, comprising a transformer box, a waste oil circulation component, a liquid level sensing valve control mechanism, a new oil filling component and a one-way oil discharge mechanism, wherein the waste oil circulation component is arranged on the side of the transformer box, the liquid level sensing valve control mechanism is located in the waste oil circulation component, the new oil filling component is arranged on the waste oil circulation component, and the one-way oil discharge mechanism is clamped in the transformer box.

[0005] Preferably, an oil filling port is provided at the top of the transformer box, and an oil drain port is provided at the bottom of the transformer box.

[0006] Before replacing new oil, impurities attached to the inside of the transformer box can be flushed out at high speed through circulating flow and continuous filtration. Without increasing the amount of new oil used, impurities that are not easily soluble can be taken out first. By changing the circulation speed, the main flushing position of the liquid can be changed, so that the effective flushing area almost covers the entire interior of the transformer box.

[0007] Furthermore, the waste oil circulation assembly includes a waste oil temporary storage cylinder and an upper oil circulation pipeline. The waste oil temporary storage cylinder is provided with a side connecting pipe and a bottom connecting pipe. The waste oil temporary storage cylinder is connected to the oil drain port through the side connecting pipe. The upper oil circulation pipeline is arranged at the top of the waste oil temporary storage cylinder. The waste oil temporary storage cylinder and the upper oil circulation pipeline are connected through.

[0008] Preferably, the waste oil circulation component also includes an oil injection connecting pipe and a circulating filter pump, wherein the circulating filter pump is arranged between the middle position of the oil circulation pipe and the oil injection port, and the circulating filter pump is provided on the oil injection connecting pipe, and the circulating filter pump can allow the liquid to flow freely when the power is off.

[0009] When started, the circulating filter pump can drive the old oil to circulate, thereby continuously flushing the inner wall of the transformer box and removing the insoluble impurities therein. By adjusting the power of the circulating filter pump through the speed regulating component, the main flushing area can be changed, thereby achieving comprehensive coverage of the main flushing area on the inside of the transformer box.

[0010] Furthermore, the liquid level sensing valve control mechanism includes a liquid level sensing filter component, an oil discharge control component and a bottom valve component, the liquid level sensing filter component is snap-fitted and slidably arranged in the waste oil circulation component, the oil discharge control component is arranged in the waste oil circulation component, and the bottom valve component is arranged in the waste oil circulation component.

[0011] The liquid level sensing valve control mechanism can, on the one hand, filter out insoluble impurities during the continuous circulation of old oil; on the other hand, it can automatically control the sequential opening and closing of valves at the new oil filling assembly, the one-way oil drain mechanism and the bottom valve assembly by sensing the liquid level in the waste oil temporary storage cylinder. In this way, without the need for any electronic control modules or complex mechanisms, adaptive opening and closing control of multiple valves during oil change is achieved through a clever mechanical structure alone.

[0012] Preferably, the liquid level sensing filter assembly includes a porous float plate, a filter screen and a float plate preload spring, the porous float plate is slidably arranged in the waste oil temporary storage cylinder, the filter screen is fixedly connected to the bottom of the porous float plate, and the float plate preload spring is arranged between the bottom of the waste oil temporary storage cylinder and the filter screen.

[0013] The filter net can filter out impurities carried in the old oil, thereby achieving the technical purpose of removing impurities attached to the transformer box during continuous circulation. The porous floating plate can float on the surface of the oil and sense the actual liquid level in the waste oil storage cylinder, thereby automatically controlling the opening and closing of each valve at the appropriate time.

[0014] As a further preferred embodiment of the present invention, the oil discharge control assembly includes an oil discharge push rod and an oil discharge limit rod, the oil discharge push rod consists of a sliding collar portion and a center rod portion, a connecting rod portion for connection is provided between the sliding collar portion and the center rod portion, the oil discharge push rod is slidably arranged in the side connecting pipe through the sliding collar portion, the oil discharge limit rod consists of a mounting ring portion and a vertical stop rod, the oil discharge limit rod is fixedly connected to the bottom of the porous floating plate through the mounting ring portion, and the vertical stop rod is vertically arranged below the mounting ring portion.

[0015] When the oil drain push rod is connected to the oil drain port, it can automatically control the opening of the one-way oil drain mechanism through its own support. When the liquid level in the waste oil temporary storage cylinder drops, the one-way oil drain mechanism can be closed by retreating the oil drain push rod.

[0016] Preferably, the bottom valve assembly comprises a bottom valve seat and a bottom valve core, wherein the bottom valve seat is snap-fitted into the bottom connecting pipe, and the opening and closing of the bottom valve assembly can be controlled by the contact and separation of the bottom valve seat and the bottom valve core.

[0017] When the bottom valve core rises and falls synchronously with the linkage vertical rod, it can follow the rise and fall sliding of the porous floating plate to contact or move away from the bottom valve seat, thereby realizing the opening and closing control of the bottom valve assembly.

[0018] Furthermore, the new oil filling assembly includes a new oil storage tank, a new oil filling piston valve and a linkage vertical rod, the new oil storage tank is fixedly connected to the upper oil circulation pipeline, the new oil filling piston valve is slidably arranged in the upper oil circulation pipeline, the porous floating plate is fixedly connected to the middle position of the linkage vertical rod, the bottom valve core is fixedly connected to the bottom end of the linkage vertical rod, and the new oil filling piston valve is fixedly connected to the top end of the linkage vertical rod.

[0019] The new oil pre-stored in the new oil storage tank can balance the elastic force of the floating plate preload spring to a certain extent, so that when the liquid level in the waste oil temporary storage cylinder drops, the porous floating plate can be pressed down through the new oil filling piston valve and the linkage vertical rod.

[0020] Furthermore, the one-way oil discharge mechanism comprises a one-way valve assembly and a valve core elastic reset assembly, the one-way valve assembly is arranged in the oil discharge port, and the valve core elastic reset assembly is arranged in the oil discharge port.

[0021] Preferably, the one-way valve assembly comprises an oil drain valve seat and an oil drain valve core, wherein the oil drain valve seat is fixedly connected to the oil drain port, and the opening and closing of the one-way valve assembly can be controlled by contact and separation between the oil drain valve seat and the oil drain valve core.

[0022] As a further preferred embodiment of the present invention, the valve core elastic reset assembly includes an oil drain closing spring and an oil drain spring seat, the oil drain spring seat is fixed in the oil drain port, one end of the oil drain closing spring is fixed to the oil drain spring seat, and the other end of the oil drain closing spring is fixed to the oil drain valve core.

[0023] The one-way valve assembly is a normally closed valve. The one-way valve assembly is in an open state when it is just connected to the side connecting pipe. After losing the top support of the center rod, it will automatically close under the elastic force of the oil drain closing spring, thereby avoiding leakage when new oil is injected.

[0024] It also includes a speed regulation component, which includes a sliding regulation switch, a sliding spring base and a continuous sliding spring. The sliding regulation switch is used to adjust the power of the circulating filtration pump. The sliding regulation switch is provided with a switch sliding portion. The sliding spring base is fixedly connected to one side of the sliding regulation switch. The continuous sliding spring is arranged between the sliding spring base and the switch sliding portion.

[0025] When the switch sliding part slides on the sliding adjustment switch, it has a sliding resistance that increases with the increase of speed. Therefore, under the continuous action of the elastic force of the continuous sliding spring, the switch sliding part will actually slide slowly. The sliding speed of the switch sliding part can vary, and as long as the sliding speed is not too fast, it does not affect the achievement of the actual effect.

[0026] The beneficial effects achieved by the present invention using the above structure are as follows:

[0027] (1) Before replacing new oil, the impurities attached to the inside of the transformer box can be flushed out at high speed through circulation and continuous filtration. Without increasing the amount of new oil used, the impurities that are not easily dissolved can be removed first. By changing the circulation speed, the main flushing position of the liquid can be changed, so that the effective flushing area almost covers the entire interior of the transformer box.

[0028] (2) When started, the circulating filter pump can drive the old oil to circulate, thereby continuously flushing the inner wall of the transformer box and removing the insoluble impurities therein. By adjusting the power of the circulating filter pump by the speed regulating component, the main flushing area can be changed, thereby achieving full coverage of the main flushing area on the inside of the transformer box.

[0029] (3) Through the liquid level sensing valve control mechanism, on the one hand, insoluble impurities can be filtered out during the continuous circulation of the old oil. On the other hand, the valves at the new oil filling assembly, the one-way oil discharge mechanism and the bottom valve assembly can be automatically opened and closed in sequence by sensing the liquid level in the waste oil temporary storage cylinder. In this way, without the need for any electronic control module or complex mechanism, adaptive opening and closing control of multiple valves during oil change can be achieved through a clever mechanical structure alone.

[0030] (4) The filter net can filter out impurities carried in the old oil, thereby achieving the technical purpose of removing impurities attached to the transformer box during the continuous circulation process. The porous floating plate can float on the surface of the oil and sense the actual liquid level in the waste oil temporary storage cylinder, thereby automatically realizing the opening and closing control of each valve at the appropriate time.

[0031] (5) When the oil drain push rod is connected to the oil drain port, it can automatically control the opening of the one-way oil drain mechanism through its own support. When the liquid level in the waste oil temporary storage tank drops, the one-way oil drain mechanism can be closed by retreating the oil drain push rod.

[0032] (6) When the bottom valve core rises and falls synchronously with the linkage vertical rod, it can follow the rise and fall sliding of the porous floating plate to contact or move away from the bottom valve seat, thereby realizing the opening and closing control of the bottom valve assembly.

[0033] (7) The new oil pre-stored in the new oil storage tank can balance the elastic force of the floating plate preload spring to a certain extent, so that when the liquid level in the waste oil temporary storage cylinder drops, the porous floating plate can be pressed down through the new oil filling piston valve and the linkage vertical rod.

[0034] (8) The one-way valve assembly is a normally closed valve. When the one-way valve assembly is just connected to the side connecting pipe, it is in an open state. After losing the support of the center rod, it will automatically close under the elastic force of the oil drain closing spring, thereby avoiding leakage when new oil is injected.

[0035] (9) When the switch sliding part slides on the sliding adjustment switch, it has a sliding resistance that increases as the speed increases. Therefore, under the continuous action of the elastic force of the continuous sliding spring, the switch sliding part will actually slide slowly. The sliding speed of the switch sliding part can vary, as long as the sliding speed is not too fast, which does not affect the achievement of the actual effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A three-dimensional diagram of an ultra-high voltage transformer oil changing device proposed by the present invention;

[0037] Figure 2 This is a front view of an ultra-high voltage transformer oil changing device proposed by the present invention;

[0038] Figure 3 This is a right side view of an ultra-high voltage transformer oil changing device proposed by the present invention;

[0039] Figure 4 A top view of an ultra-high voltage transformer oil changing device proposed by the present invention;

[0040] Figure 5 for Figure 3 A cross-sectional view along the cutting line AA;

[0041] Figure 6 This is an explosion diagram of an ultra-high voltage transformer oil changing device proposed by the present invention;

[0042] Figure 7 for Figure 5 A partial enlarged view of point Ⅰ in the middle;

[0043] Figure 8 for Figure 5 A partial enlarged view of the middle II;

[0044] Fig. 9 for Figure 5 A partial enlarged view of the middle part III;

[0045] Fig.10 for Figure 6 A partial enlarged view of the middle IV;

[0046] Fig.11 It is a structural diagram of the speed regulation component.

[0047] Among them, 1. Transformer box, 2. Waste oil circulation component, 3. Liquid level sensing valve control mechanism, 4. New oil filling component, 5. One-way oil discharge mechanism, 6. Oil filling port, 7. Oil discharge port, 8. Waste oil temporary storage cylinder, 9. Oil circulation pipeline, 10. Oil filling connecting pipeline, 11. Circulating filter pump, 12. Side connecting pipe, 13. Bottom connecting pipe, 14. Liquid level sensing filter component, 15. Oil discharge control component, 16. Bottom valve component, 17. Porous floating plate, 18. Filter net, 19. Floating plate preload spring, 20. Oil discharge push rod, 21. Oil discharge limit Position rod, 22. Bottom valve seat, 23. Bottom valve core, 24. Sliding collar part, 25. Center rod part, 26. Connecting rod part, 27. Mounting ring part, 28. Vertical gear lever, 29. New oil storage tank, 30. New oil filling piston valve, 31. Linkage vertical rod, 32. One-way valve assembly, 33. Valve core elastic reset assembly, 34. Oil drain valve seat, 35. Oil drain valve core, 36. Oil drain closing spring, 37. Oil drain spring seat, 38. Speed ​​control assembly, 39. Sliding adjustment switch, 40. Sliding spring base, 41. Continuous sliding spring, 42. Switch sliding part.

[0048] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0049] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0050] In the description of the present invention, it should be understood that terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “top”, “bottom”, “inside” and “outside” indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0051] like Figure 1 to Figure 11 As shown, the present invention proposes an ultra-high voltage transformer oil changing device, comprising a transformer box 1, a waste oil circulation component 2, a liquid level sensing valve control mechanism 3, a new oil filling component 4 and a one-way oil discharge mechanism 5, the waste oil circulation component 2 is arranged on the side of the transformer box 1, the liquid level sensing valve control mechanism 3 is located in the waste oil circulation component 2, the new oil filling component 4 is arranged on the waste oil circulation component 2, and the one-way oil discharge mechanism 5 is clamped and arranged in the transformer box 1.

[0052] An oil filling port 6 is provided at the top of the transformer box 1 , and an oil drain port 7 is provided at the bottom of the transformer box 1 .

[0053] Before replacing new oil, impurities attached to the inside of the transformer box 1 can be flushed out at high speed through circulating flow and continuous filtration, and impurities that are not easily soluble can be taken out first without increasing the amount of new oil used; by changing the circulation speed, the main flushing position of the liquid can be changed, so that the effective flushing area nearly covers the entire interior of the transformer box 1.

[0054] The waste oil circulation assembly 2 includes a waste oil temporary storage cylinder 8 and an upper oil circulation pipeline 9. The waste oil temporary storage cylinder 8 is provided with a side connecting pipe 12 and a bottom connecting pipe 13. The waste oil temporary storage cylinder 8 is connected to the oil drain port 7 through the side connecting pipe 12. The upper oil circulation pipeline 9 is arranged at the top of the waste oil temporary storage cylinder 8. The waste oil temporary storage cylinder 8 and the upper oil circulation pipeline 9 are connected through.

[0055] The waste oil circulation component 2 also includes an oil injection connecting pipe 10 and a circulating filter pump 11. The circulating filter pump 11 is arranged between the middle position of the upper oil circulation pipe 9 and the oil injection port 6. The circulating filter pump 11 is provided on the oil injection connecting pipe 10. The circulating filter pump 11 can allow liquid to flow freely when the power is off.

[0056] When the circulating filtration pump 11 starts, it can drive the old oil to circulate, thereby continuously flushing the inner wall of the transformer box 1 and carrying out the insoluble impurities therein. By adjusting the power of the circulating filtration pump 11 through the speed regulation component 38, the mainly flushed area can be changed, so as to achieve the full coverage of the inner part of the transformer box 1 by the mainly flushed area.

[0057] The one-way oil discharge mechanism 5 includes a one-way valve assembly 32 and a valve core elastic reset assembly 33. The one-way valve assembly 32 is arranged in the oil discharge port 7, and the valve core elastic reset assembly 33 is arranged in the oil discharge port 7.

[0058] The one-way valve assembly 32 includes an oil discharge valve seat 34 and an oil discharge valve core 35. The oil discharge valve seat 34 is fixedly connected in the oil discharge port 7. The opening and closing of the one-way valve assembly 32 can be controlled by the contact and separation of the oil discharge valve seat 34 and the oil discharge valve core 35.

[0059] The valve core elastic reset assembly 33 includes an oil discharge closing spring 36 and an oil discharge spring seat 37. The oil discharge spring seat 37 is fixedly connected in the oil discharge port 7. One end of the oil discharge closing spring 36 is fixedly connected to the oil discharge spring seat 37, and the other end of the oil discharge closing spring 36 is fixedly connected to the oil discharge valve core 35.

[0060] The one-way valve assembly 32 is a normally closed valve. When the one-way valve assembly 32 is just connected to the side connecting pipe 12, it is in an open state. After losing the support of the central rod part 25, it will automatically close under the elastic force of the oil discharge closing spring 36, so as to avoid leakage when new oil is injected.

[0061] It further includes a speed regulation component 38. The speed regulation component 38 includes a sliding adjustment switch 39, a sliding spring base 40 and a continuous sliding spring 41. The sliding adjustment switch 39 is used to adjust the power of the circulating filtration pump 11. A switch sliding part 42 is arranged on the sliding adjustment switch 39. The sliding spring base 40 is fixedly connected to one side of the sliding adjustment switch 39, and the continuous sliding spring 41 is arranged between the sliding spring base 40 and the switch sliding part 42.

[0062] When the switch sliding part 42 slides on the sliding adjustment switch 39, it has a sliding resistance that increases with the increase of speed. Therefore, under the continuous action of the elastic force of the continuous sliding spring 41, the switch sliding part 42 will actually slide slowly. The sliding speed of the switch sliding part 42 can vary, as long as the sliding speed is not too fast, which does not affect the achievement of the actual effect.

[0063] The liquid level induction type valve control mechanism 3 includes a liquid level induction type filtration component 14, an oil discharge control component 15 and a bottom valve component 16. The liquid level induction type filtration component 14 is clamped and slidably arranged in the waste oil circulation component 2. The oil discharge control component 15 is arranged in the waste oil circulation component 2, and the bottom valve component 16 is arranged in the waste oil circulation component 2.

[0064] The liquid level sensing valve control mechanism 3 can filter out insoluble impurities during the continuous circulation of the old oil, and can automatically control the sequential opening and closing of the valves at the new oil filling component 4, the one-way oil discharge mechanism 5 and the bottom valve component 16 by sensing the liquid level in the waste oil temporary storage cylinder 8, thereby realizing adaptive opening and closing control of multiple valves during oil change without the need for any electronic control module or complex mechanism, only through an ingenious mechanical structure.

[0065] The liquid level sensing filter assembly 14 includes a porous floating plate 17, a filter screen 18 and a floating plate preload spring 19. The porous floating plate 17 is slidably arranged in the waste oil temporary storage tube 8, the filter screen 18 is fixedly connected to the bottom of the porous floating plate 17, and the floating plate preload spring 19 is arranged between the bottom of the waste oil temporary storage tube 8 and the filter screen 18.

[0066] The filter 18 can filter out impurities in the old oil, thereby achieving the technical purpose of removing impurities attached to the transformer box 1 during continuous circulation, and the porous floating plate 17 can float on the surface of the oil to sense the actual liquid level in the waste oil temporary storage cylinder 8, thereby automatically realizing the opening and closing control of each valve at the appropriate time.

[0067] The oil discharge control assembly 15 includes an oil discharge push rod 20 and an oil discharge limit rod 21. The oil discharge push rod 20 is composed of a sliding collar portion 24 and a center rod portion 25. A connecting rod portion 26 for connection is provided between the sliding collar portion 24 and the center rod portion 25. The oil discharge push rod 20 is slidably arranged in the side connecting pipe 12 through the sliding collar portion 24. The oil discharge limit rod 21 is composed of a mounting ring portion 27 and a vertical stop rod 28. The oil discharge limit rod 21 is fixedly connected to the bottom of the porous floating plate 17 through the mounting ring portion 27. The vertical stop rod 28 is vertically arranged below the mounting ring portion 27.

[0068] When the oil drain push rod 20 is connected to the oil drain port 7, it can automatically control the opening of the one-way oil drain mechanism 5 through its own support. When the liquid level in the waste oil temporary storage cylinder 8 drops, the one-way oil drain mechanism 5 can be closed by retreating the oil drain push rod 20.

[0069] The bottom valve assembly 16 includes a bottom valve seat 22 and a bottom valve core 23 . The bottom valve seat 22 is engaged in the bottom connecting pipe 13 . The opening and closing of the bottom valve assembly 16 can be controlled by the contact and separation of the bottom valve seat 22 and the bottom valve core 23 .

[0070] When the bottom valve core 23 rises and falls synchronously with the linkage vertical rod 31 , it can follow the rise and fall sliding of the porous floating plate 17 to contact or move away from the bottom valve seat 22 , thereby realizing the opening and closing control of the bottom valve assembly 16 .

[0071] The new oil filling assembly 4 includes a new oil storage tank 29, a new oil filling piston valve 30 and a linkage vertical rod 31. The new oil storage tank 29 is fixedly connected to the upper oil circulation pipeline 9. The new oil filling piston valve 30 is slidably arranged in the upper oil circulation pipeline 9. The porous floating plate 17 is fixedly connected to the middle position of the linkage vertical rod 31. The bottom valve core 23 is fixedly connected to the bottom end of the linkage vertical rod 31. The new oil filling piston valve 30 is fixedly connected to the top end of the linkage vertical rod 31.

[0072] The new oil pre-stored in the new oil storage tank 29 can balance the elastic force of the floating plate preload spring 19 to a certain extent, so that when the liquid level in the waste oil temporary storage cylinder 8 drops, the porous floating plate 17 can be pressed down through the new oil filling piston valve 30 and the linkage vertical rod 31.

[0073] When in use, the user first needs to insert the side connecting pipe 12 into the oil drain port 7, and connect the oil filling connecting pipe 10 and the oil filling port 6; because the porous floating plate 17 is located at the top of the waste oil temporary storage cylinder 8 under the elastic force of the floating plate preload spring 19 in the initial state (at the same time, the bottom valve assembly 16 is in a closed state, and the new oil injection piston valve 30 is also located above the oil filling connecting pipe 10), the oil drain push rod 20 cannot slide back under the obstruction of the vertical gear rod 28, so the central rod 25 will support the oil drain valve core 35 and make it leave the oil drain valve seat 34, thereby opening the one-way valve assembly 32;

[0074] After the one-way valve assembly 32 is opened, the old oil in the transformer box 1 will flow into the waste oil temporary storage cylinder 8 through the one-way valve assembly 32 and the side connecting pipe 12. Since the liquid levels of the upper oil circulation pipeline 9 and the transformer box 1 are automatically equal after they are connected, and the cross-sectional area of ​​the upper oil circulation pipeline 9 is small, the oil flowing into the upper oil circulation pipeline 9 will only cause a small drop in the liquid level in the transformer box 1.

[0075] Then, the switch sliding part 42 is slid to the initial position of one end of the sliding adjustment switch 39. At this time, the power of the circulating filter pump 11 is the largest. At this time, the liquid circulates in the channel of the transformer box 1, the waste oil temporary storage cylinder 8, the oil circulation pipeline 9 and the oil filling connecting pipeline 10. The greater the power of the circulating filter pump 11, the greater the force of drawing the old oil at the oil drain port 7 and spraying the old oil at the oil filling port 6, and the farther the position of the fluid in the transformer box 1 is from the oil filling port 6 and the oil drain port 7;

[0076] As the switch sliding part 42 slides slowly, the power of the circulating filter pump 11 becomes smaller and smaller, and the main flushing area gradually approaches the side where the oil filling port 6 and the oil drain port 7 are located from the initial position, until the switch sliding part 42 slides to the extreme position at the other end, the sliding adjustment switch 39 will be directly disconnected from the state of having a certain power (not gradually returning to zero). At this time, the circulating filter pump 11 can be regarded as a section of a pipe that allows liquid to flow freely.

[0077] During the circulation of the used oil, the inner wall of the transformer box 1 can be continuously flushed to remove insoluble impurities attached to the inner wall, and when the used oil passes through the filter 18, the impurities are filtered out and deposited at the bottom of the waste oil temporary storage cylinder 8.

[0078] During the circulation of the old oil, the flowing liquid has the force to continuously push the porous floating plate 17 upwards, so during this process, new oil is injected into the new oil storage tank 29, and the amount of new oil is equal to the required amount in the transformer tank 1. Since the new oil storage tank 29 is shallow and the flowing liquid continuously pushes the porous floating plate 17 upwards, the new oil in the new oil storage tank 29 is not enough to press the new oil injection piston valve 30 and the linkage vertical rod 31 downwards to slide;

[0079] As the power of the circulating filter pump 11 gradually decreases, when the switch sliding part 42 slides to the end and the circulating filter pump 11 is suddenly powered off, since the liquid no longer has the force to push the porous floating plate 17 upward, the pressure of the new oil in the new oil storage tank 29 overcomes the elastic force of the floating plate preload spring 19 and causes the porous floating plate 17 to drop slightly. At this time, through the linkage of the linkage vertical rod 31, the bottom valve core 23 is also separated from the bottom valve seat 22. At this time, the old oil in the waste oil temporary storage cylinder 8 will be discharged into the external container through the bottom valve assembly 16 together with the impurities deposited at the bottom. However, since there is still liquid in the waste oil temporary storage cylinder 8, the porous floating plate 17 will stop after a small drop, and finally drop as the liquid level in the waste oil temporary storage cylinder 8 drops.

[0080] In the initial stage, the old oil in the oil circulation pipeline 9 and the transformer box 1 is discharged through the bottom connecting pipe 13 at the bottom of the waste oil temporary storage cylinder 8, but the waste oil temporary storage cylinder 8 is still filled with oil. When the oil in the transformer box 1 is completely discharged, the liquid level in the waste oil temporary storage cylinder 8 will drop. At this time, the porous floating plate 17 also drops along with the drop in the liquid level of the waste oil temporary storage cylinder 8. When the porous floating plate 17 drops to a height lower than the oil drain push rod 20, the oil drain valve core 35 will contact the oil drain valve seat 34 again and close under the elastic force of the oil drain closing spring 36. At this time, the oil drain push rod 20 is pushed to slide a certain distance.

[0081] After the one-way valve assembly 32 is closed, the porous floating plate 17 continues to slide downward with the linkage vertical rod 31 and the new oil filling piston valve 30. When the new oil filling piston valve 30 slides to the bottom of the oil filling connecting pipe 10, the new oil in the new oil storage tank 29 is injected into the transformer box 1 through the oil filling connecting pipe 10 and the oil filling port 6.

[0082] As the liquid in the new oil storage tank 29 decreases, the pressure of the liquid on the new oil filling piston valve 30 actually decreases. At this time, the floating plate preload spring 19 has a tendency to push the porous floating plate 17 upward. However, since the central rod portion 25 that has moved horizontally at this time has a blocking effect on the porous floating plate 17, the new oil storage tank 29 and the oil filling connecting pipe 10 are still connected until the new oil in the new oil storage tank 29 is completely injected into the transformer box 1.

[0083] After the new oil is injected, the oil filling port 6 can be screwed on to complete the oil change. Before the next use, the porous floating plate 17 can be reset to the top of the waste oil temporary storage cylinder 8 by pulling out the central rod 25.

[0084] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0085] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. An ultra-high voltage transformer oil changing device, characterized in that: The utility model comprises a transformer box (1), a waste oil circulation component (2), a liquid level sensing valve control mechanism (3), a new oil filling component (4) and a one-way oil discharge mechanism (5), wherein the waste oil circulation component (2) is arranged on the side of the transformer box (1), the liquid level sensing valve control mechanism (3) is located in the waste oil circulation component (2), the new oil filling component (4) is arranged on the waste oil circulation component (2), and the one-way oil discharge mechanism (5) is clamped and arranged in the transformer box (1); The top of the transformer box (1) is provided with an oil filling port (6), and the bottom of the transformer box (1) is provided with an oil drain port (7); The liquid level sensing valve control mechanism (3) comprises a liquid level sensing filter assembly (14), an oil discharge control assembly (15) and a bottom valve assembly (16); the liquid level sensing filter assembly (14) is slidably mounted in the waste oil circulation assembly (2); the oil discharge control assembly (15) is disposed in the waste oil circulation assembly (2); and the bottom valve assembly (16) is disposed in the waste oil circulation assembly (2); The waste oil circulation component (2) comprises a waste oil temporary storage cylinder (8); The liquid level sensing filter assembly (14) comprises a porous floating plate (17), a filter screen (18) and a floating plate preload spring (19); the porous floating plate (17) is slidably arranged in the waste oil temporary storage cylinder (8); the filter screen (18) is fixedly connected to the bottom of the porous floating plate (17); and the floating plate preload spring (19) is arranged between the bottom of the waste oil temporary storage cylinder (8) and the filter screen (18); The oil discharge control assembly (15) comprises an oil discharge push rod (20) and an oil discharge limit rod (21), wherein the oil discharge push rod (20) is composed of a sliding collar portion (24) and a central rod portion (25), a connecting rod portion (26) for connection is provided between the sliding collar portion (24) and the central rod portion (25), the oil discharge push rod (20) is slidably arranged in the side connecting pipe (12) through the sliding collar portion (24), the oil discharge limit rod (21) is composed of a mounting ring portion (27) and a vertical stop rod (28), the oil discharge limit rod (21) is fixedly connected to the bottom of the porous floating plate (17) through the mounting ring portion (27), and the vertical stop rod (28) is vertically arranged below the mounting ring portion (27); The bottom valve assembly (16) comprises a bottom valve seat (22) and a bottom valve core (23); the bottom valve seat (22) is engaged in the bottom connecting pipe (13); and the opening and closing of the bottom valve assembly (16) can be controlled by the contact and separation of the bottom valve seat (22) and the bottom valve core (23).

2. The ultra-high voltage transformer oil changing device according to claim 1, characterized in that: The waste oil circulation assembly (2) further comprises an upper oil circulation pipeline (9); the waste oil temporary storage barrel (8) is provided with a side connection pipe (12) and a bottom connection pipe (13); the waste oil temporary storage barrel (8) is connected to the oil drain port (7) via the side connection pipe (12); the upper oil circulation pipeline (9) is arranged at the top of the waste oil temporary storage barrel (8); and the waste oil temporary storage barrel (8) and the upper oil circulation pipeline (9) are connected to each other.

3. The ultra-high voltage transformer oil changing device according to claim 2 is characterized in that: The waste oil circulation assembly (2) further comprises an oil injection connecting pipe (10) and a circulation filter pump (11), wherein the circulation filter pump (11) is arranged between the middle position of the upper oil circulation pipe (9) and the oil injection port (6), and the circulation filter pump (11) is arranged on the oil injection connecting pipe (10), and the circulation filter pump (11) can allow liquid to flow freely when power is off.

4. The ultra-high voltage transformer oil changing device according to claim 3 is characterized in that: The new oil injection assembly (4) comprises a new oil storage tank (29), a new oil injection piston valve (30) and a linkage vertical rod (31); the new oil storage tank (29) is fixedly connected to the upper oil circulation pipeline (9); the new oil injection piston valve (30) is slidably arranged in the upper oil circulation pipeline (9); the porous floating plate (17) is fixedly connected to the middle position of the linkage vertical rod (31); the bottom valve core (23) is fixedly connected to the bottom end of the linkage vertical rod (31); and the new oil injection piston valve (30) is fixedly connected to the top end of the linkage vertical rod (31).

5. The ultra-high voltage transformer oil changing device according to claim 4, characterized in that: The one-way oil discharge mechanism (5) comprises a one-way valve assembly (32) and a valve core elastic reset assembly (33); the one-way valve assembly (32) is arranged in the oil discharge port (7); and the valve core elastic reset assembly (33) is arranged in the oil discharge port (7); The one-way valve assembly (32) comprises an oil drain valve seat (34) and an oil drain valve core (35); the oil drain valve seat (34) is fixedly connected to the oil drain port (7); and the opening and closing of the one-way valve assembly (32) can be controlled by the contact and separation of the oil drain valve seat (34) and the oil drain valve core (35).

6. The ultra-high voltage transformer oil changing device according to claim 5, characterized in that: The valve core elastic reset assembly (33) comprises an oil discharge closing spring (36) and an oil discharge spring seat (37); the oil discharge spring seat (37) is fixedly connected to the oil discharge port (7); one end of the oil discharge closing spring (36) is fixedly connected to the oil discharge spring seat (37); and the other end of the oil discharge closing spring (36) is fixedly connected to the oil discharge valve core (35).

7. The ultra-high voltage transformer oil changing device according to claim 6, characterized in that: The invention also comprises a speed regulating assembly (38), the speed regulating assembly (38) comprising a sliding regulating switch (39), a sliding spring base (40) and a continuous sliding spring (41), the sliding regulating switch (39) being used to regulate the power of the circulating filter pump (11), the sliding regulating switch (39) being provided with a switch sliding portion (42), the sliding spring base (40) being fixedly connected to one side of the sliding regulating switch (39), and the continuous sliding spring (41) being provided between the sliding spring base (40) and the switch sliding portion (42).

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