Vacuum oil injection device for transformer
By designing a transformer vacuum oil filling device with a lifting platform, vacuum oil filling system and switching mechanism, the problem of outside air and impurities entering the transformer is solved, high-quality vacuum oil filling is achieved, and the normal use of the transformer is guaranteed.
Patent Information
- Application Number
- CN202422383674.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-29
- Publication Date
- 2025-09-12
- Estimated Expiration
- 2034-09-29
AI Technical Summary
When the existing transformer vacuum oil filling device is in the pumping and filling switching operation, outside air and impurities can easily enter the transformer, affecting the cleanliness and vacuum degree of the oil filling, resulting in damage to the normal use of the transformer.
A transformer vacuum oil filling device is designed, which includes a lifting platform, a vacuum oil filling system, an adjustment device and a switching mechanism. By setting up the switching mechanism and auxiliary mechanism, it is ensured that after the oil extraction and air operation are completed, new oil can be injected into the transformer without impurities, thereby preventing outside air and impurities from entering.
The quality of transformer vacuum oil filling is improved, the probability of transformer contamination is reduced, and the normal use of the transformer is ensured.
Smart Images
Figure CN223333622U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of transformers, in particular to a transformer vacuum oil filling device. Background Art
[0002] A transformer is a device that uses electromagnetic induction to change AC voltage. Its main components are the primary coil, the secondary coil, and the iron core. Its main functions include voltage conversion, current conversion, impedance conversion, isolation, and voltage stabilization. Transformers are basic equipment for power transmission and distribution and are widely used in industry, agriculture, transportation, urban communities, and other fields. When transformers work for a long time, they are prone to heat up, and oil usually needs to be added to the transformer. Existing oil filling devices have some shortcomings: Most of the current vacuum oil filling devices used in transformer production are fixed and cannot be adjusted, and the oil cannot be filtered. When we use the device, it is difficult to adjust due to the fixed structure, thereby reducing the working efficiency of the device.
[0003] At present, a Chinese patent discloses a vacuum oil filling device for transformer production (publication number CN216719679U). The vacuum oil filling device for transformer production is provided with a one-way filter and a filter plate inside the one-way filter. When the interior of the transformer is evacuated or oil is extracted, the filter plate can filter impurities in the air and oil to prevent excessive impurities from damaging the transformer; the staff inserts the oil extraction connecting pipe into the interior of the transformer to extract the remaining oil and air, and then opens the second one-way valve 15 to allow the remaining oil to flow out of the discharge pipe 14, and then extracts new oil through the oil extraction connecting pipe, and then removes the one-way filter 9 and inserts the oil extraction connecting pipe into the interior of the transformer and causes the electric push rod 12 to drive the movable plug 13 to move downward to add the oil inside the vacuum oil filling system 3 into the interior of the transformer.
[0004] According to the above reference materials, the staff needs to extract the oil and air inside the transformer, remove the one-way filter and then insert the oil extraction connecting pipe into the transformer to fill the oil. Due to the above operation after extracting oil and air, the inside of the transformer is in a negative pressure state. When the staff removes the one-way filter and connects the oil extraction connecting pipe to the transformer, the oil inlet and outlet of the transformer will inevitably inhale air or impurities, which will undoubtedly affect the cleanliness and vacuum degree of the subsequent oil filling, and it is easy to affect the subsequent normal use of the transformer. Utility Model Content
[0005] The purpose of the utility model is to solve the above-mentioned problem and to propose a transformer vacuum oil filling device, which improves the problem that the existing transformer vacuum oil filling device is difficult to ensure that external air and impurities do not enter the interior of the transformer during the extraction and injection switching operation, which can easily affect the subsequent normal use of the transformer.
[0006] The vacuum oil filling device of the transformer comprises: a lifting platform, the upper end of which is fixedly connected to the vacuum oil filling system; an adjusting device, which is fixedly connected and communicated with the surface of the vacuum oil filling system; wherein the adjusting device comprises a first connecting pipe and a second connecting pipe, the second connecting pipe is fixedly connected and communicated with the surface of the vacuum oil filling system, the first connecting pipe and the second connecting pipe are fixedly connected and communicated with a switching mechanism, the switching mechanisms are fixedly connected and communicated with a one-way filter and a return pipe, and an auxiliary mechanism is installed on the surface of the switching mechanism. By setting the adjusting device, when the staff completes the oil and air extraction operations, the staff only needs to adjust the first connecting pipe and the second connecting pipe respectively to be connected to the return pipe through the switching mechanism. At this time, the vacuum oil filling system can vacuum inject new oil into the interior of the transformer, effectively reducing the influx of outside air and impurities into the interior of the transformer, which effectively improves the quality of the vacuum oil filling of the transformer to ensure the subsequent normal use of the transformer.
[0007] Preferably, the switching mechanism includes two circular boxes fixedly connected between the first connecting tube and the second connecting tube, the one-way filter and the return pipe are fixedly connected and communicated with the opposite ends of the two circular boxes, the inner wall of the circular box is rotatably connected with a cylinder, and a liquid guide port is provided on the surface of the cylinder, the two openings of the liquid guide port away from the vacuum oil injection system are respectively communicated with the first connecting tube and the one-way filter, and the two openings of the liquid guide port close to the vacuum oil injection system are respectively communicated with the one-way filter and the second connecting tube, the upper end of the cylinder is fixedly connected with an adjusting shaft, and the upper end of the adjusting shaft passes through the outside of the circular box.
[0008] Preferably, the angle between the center points of the two openings of the liquid guide port is one hundred and twenty degrees, the angle between the axis lines of the opposite ends of the one-way filter and the return pipe is one hundred and twenty degrees, the intersection of the axis lines of the opposite ends of the one-way filter and the return pipe, the intersection of the center points of the two openings of adjacent liquid guide ports and the center points of the adjacent cylinders coincide with each other, which can ensure that every time the adjustment shaft drives the liquid guide port to rotate one hundred and twenty degrees, the liquid guide port can be connected with the two adjacent openings, so as to improve the accuracy of the adjustment.
[0009] Preferably, the upper end of the adjustment shaft is fixedly connected with an adjustment handle, and the corners of the adjustment handle are rounded, which can reduce the difficulty of adjustment for the staff and make the adjustment smoother for the staff.
[0010] Preferably, the auxiliary mechanism includes a mounting plate, the upper ends of the two round boxes are fixedly connected to the mounting plate, and two staggered limit cavities are provided inside the mounting plate. The upper end of the adjusting shaft passes through the mounting plate and the adjacent limit cavity in sequence and extends to the outside of the mounting plate. The surface of the adjusting shaft is fixedly connected to a limit frame that is slidably connected to the inside of the adjacent limit cavity. The angle between the two limit frames is one hundred and twenty degrees. The horizontal cross-section of the limit cavity is fan-shaped, and the arc-shaped inner walls of the two limit cavities are opposite. The limit cavity can provide a rotation angle of one hundred and twenty degrees for the limit frame. By setting an auxiliary mechanism and adopting the design of the limit cavity and the limit frame, the rotatable range and trajectory of the two adjusting shafts are limited to avoid the probability of the staff over-rotating the adjusting shaft.
[0011] Preferably, the interior of the mounting plate is provided with two sliding cavities which are respectively connected to the two limit cavities, the inner wall of the sliding cavity is slidably connected to a rack, the opposite ends of the two racks are meshedly connected to a gear fixedly connected to the adjacent adjusting shaft, and the end of the rack close to the one-way filter away from the second connecting pipe is plugged into the limiting frame close to the first connecting pipe. For example, if the staff needs to switch the liquid guide port connected to the one-way filter to be connected to the return pipe, the staff must first rotate the adjusting shaft close to the vacuum oil injection system before rotating the adjusting shaft of the principle vacuum oil injection system. This can reduce the probability of air inside the return pipe entering the transformer due to misoperation by the staff, reduce the probability of contamination inside the transformer, and thereby achieve a good guiding effect.
[0012] The beneficial effects of the utility model are:
[0013] 1. By setting up the adjustment device, when the staff completes the oil and air extraction operations, they only need to adjust the first connecting pipe and the second connecting pipe to connect with the return pipe through the switching mechanism. At this time, the vacuum oil filling system can vacuum-inject new oil into the interior of the transformer, effectively reducing the influx of external air and impurities into the interior of the transformer. This effectively improves the quality of the transformer's vacuum oil filling and ensures the subsequent normal use of the transformer;
[0014] 2. By setting up auxiliary mechanisms and adopting the design of limit chambers and limit frames, the rotation range and trajectory of the two adjustment shafts are limited to avoid the probability of excessive rotation of the adjustment shafts by the staff; taking the example of the staff needing to switch the liquid guide port connected to the one-way filter to the one connected to the return pipe, the staff must first rotate the adjustment shaft close to the vacuum oil injection system before rotating the adjustment shaft of the principle vacuum oil injection system. This can reduce the probability of the staff causing the air inside the return pipe to enter the transformer due to misoperation, reduce the probability of contamination inside the transformer, and thus achieve a good guiding effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a structural diagram of the utility model;
[0016] Figure 2 This is a schematic structural diagram of the regulating device in the present utility model;
[0017] Figure 3 It is a cross-sectional schematic diagram of the regulating device in the present utility model;
[0018] Figure 4 It is a cross-sectional schematic diagram of the auxiliary mechanism in the present utility model;
[0019] Figure 5 This is a schematic diagram of the connection between the switching mechanism and the auxiliary mechanism of the utility model.
[0020] In the figure: 1. Lifting platform; 2. Vacuum oil injection system; 3. Adjusting device; 31. First connecting pipe; 32. Second connecting pipe; 33. Switching mechanism; 331. Round box; 332. Cylinder; 333. Liquid guide port; 334. Adjusting shaft; 335. Adjusting handle; 34. One-way filter; 35. Return pipe; 36. Auxiliary mechanism; 361. Mounting plate; 362. Limiting cavity; 363. Limiting frame; 364. Sliding cavity; 365. Gear; 366. Rack. DETAILED DESCRIPTION
[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0022] When implementing: Figure 1-5As shown, the transformer vacuum oil filling device includes: a lifting platform 1, the upper end of the lifting platform 1 is fixedly connected to the vacuum oil filling system 2; an adjusting device 3, the adjusting device 3 is fixedly connected to and communicated with the surface of the vacuum oil filling system 2; wherein the adjusting device 3 includes a first connecting pipe 31 and a second connecting pipe 32, the second connecting pipe 32 is fixedly connected and communicated with the surface of the vacuum oil filling system 2, the first connecting pipe 31 and the second connecting pipe 32 are fixedly connected and communicated with a switching mechanism 33, the switching mechanisms 33 are fixedly connected and communicated with a one-way filter 34 and a return pipe 35, and an auxiliary mechanism 36 is installed on the surface of the switching mechanism 33. The vacuum oil filling system 2 includes an oil storage barrel fixedly connected to the upper end of the lifting platform 1, the upper end of the oil storage barrel is fixedly connected and communicated with a vacuum pump, and the upper end of the oil storage barrel is fixedly connected and communicated with a first connecting pipe 31 and a second connecting pipe 32 arranged on one side of the vacuum pump. A valve, a second valve connected to the lowest point of the bottom wall of the oil storage barrel is fixedly connected to the surface of the oil storage barrel, and the oil storage barrel and the second connecting pipe 32 are fixedly connected and connected with a third valve. When oil and air need to be extracted, the staff opens the third valve. At this time, the second connecting pipe 32 is connected to the oil storage barrel, so that the vacuum pump extracts the oil and air inside the transformer through the oil storage barrel through the entire regulating device 3. When the oil and air are extracted, the staff closes the third valve and opens the second valve. At this time, the oil inside the oil storage barrel is discharged along the second valve under the action of gravity. When the oil inside the oil storage barrel is drained, the staff closes the second valve and opens the first valve. The staff injects new oil into the oil storage barrel through the first valve, and then the staff closes the first valve and opens the third valve. The new oil enters the interior of the transformer through the third valve and the regulating device 3.
[0023] like Figure 3 、 Figure 4 and Figure 5As shown, the switching mechanism 33 includes two round boxes 331 respectively fixedly connected between the first connecting pipe 31 and the second connecting pipe 32, the one-way filter 34 and the return pipe 35 are fixedly connected and communicated with the opposite ends of the two round boxes 331, the inner wall of the round box 331 is rotatably connected to a cylinder 332, and the surface of the cylinder 332 is provided with a liquid guide port 333, the two openings of the liquid guide port 333 away from the vacuum oil injection system 2 are respectively communicated with the first connecting pipe 31 and the one-way filter 34, and the two openings of the liquid guide port 333 close to the vacuum oil injection system 2 are respectively communicated with the one-way filter 34 and the second connecting pipe The connecting pipe 32 is connected, and the upper end of the cylinder 332 is fixedly connected to the adjusting shaft 334, and the upper end of the adjusting shaft 334 passes through the outside of the round box 331; the center points of the two openings of the liquid guide port 333 are at an angle of one hundred and twenty degrees, and the angle between the axis lines of the opposite ends of the one-way filter 34 and the return pipe 35 is at an angle of one hundred and twenty degrees, and the intersection of the axis lines of the opposite ends of the one-way filter 34 and the return pipe 35, the intersection of the center points of the two openings of adjacent liquid guide ports 333 and the center points of adjacent cylinders 332 coincide with each other; the upper end of the adjusting shaft 334 is fixedly connected to the adjusting handle 335, and the corners of the adjusting handle 335 are rounded.
[0024] like Figure 4 and Figure 5As shown, the auxiliary mechanism 36 includes a mounting plate 361, the upper ends of the two round boxes 331 are fixedly connected to the mounting plate 361, the interior of the mounting plate 361 is provided with two staggered limiting cavities 362, the upper end of the adjustment shaft 334 sequentially passes through the mounting plate 361 and the adjacent limiting cavity 362 and extends to the outside of the mounting plate 361, the surface of the adjustment shaft 334 is fixedly connected to a limiting frame 363 slidably connected to the interior of the adjacent limiting cavity 362, the angle between the two limiting frames 363 is 120 degrees, the horizontal cross-section of the limiting cavity 362 is fan-shaped, and the two limiting cavities 334 are fixedly connected to the surface of the adjustment shaft 334. 62 is opposite, and the limiting cavity 362 can provide the limiting frame 363 with a rotation angle of 120 degrees {the limiting frame 363 close to the one-way filter 34 is in contact with the vertical inner wall of the limiting cavity 362 and the rack 366}; the interior of the mounting plate 361 is provided with two sliding cavities 364 respectively connected to the two limiting cavities 362, and the inner wall of the sliding cavity 364 is slidably connected to the rack 366, and the opposite ends of the two racks 366 are meshed with a gear 365 fixedly connected to the adjacent adjusting shaft 334, and the rack 366 close to the one-way filter 34 is away from the second connecting One end of the tube 32 is plugged into the limit frame 363 near the first connecting tube 31. When the staff needs to switch the liquid guide port 333 connected to the one-way filter 34 to be connected to the return pipe 35, the staff must first rotate the adjustment shaft 334 near the vacuum oil injection system 2. The adjustment shaft 334 drives the adjacent rack 366 to rotate through the gear 365 connected thereto, so that the rack 366 is separated from the limit frame 363 away from the vacuum oil injection system 2 until the adjustment shaft 334 near the vacuum oil injection system 2 is rotated into place. At this time, the limit frame 363 of the vacuum oil injection system 2 is level. The vacuum oil injection system 2 is operated, and at the same time, the limit frame 363 on the adjustment shaft 334 away from the vacuum oil injection system 2 is just unlocked, and then the staff can rotate the adjustment shaft 334 away from the vacuum oil injection system 2. During the rotation, the adjustment shaft 334 away from the vacuum oil injection system 2 drives the adjacent rack 366 to slide and insert into the limit frame 363 close to the vacuum oil injection system 2 through the gear 365 connected thereto. Conversely, the staff needs to rotate the adjustment shaft 334 away from the vacuum oil injection system 2 first, and then can rotate the adjustment shaft 334 close to the vacuum oil injection system 2.
[0025] When the utility model is in use, when the staff needs to extract the oil and air inside the transformer, the staff first inserts the first connecting pipe 31 into the oil port of the transformer, and the staff first rotates the two adjusting shafts 334, the adjusting shaft 334 drives the cylinder 332 to rotate, and the cylinder 332 drives the liquid guide port 333 to rotate, and makes the two openings of the liquid guide port 333 away from the vacuum oil filling system 2 communicate with the first connecting pipe 31 and the one-way filter 34 respectively, and the two end openings of the liquid guide port 333 close to the vacuum oil filling system 2 communicate with the second connecting pipe 32 and the one-way filter 34 respectively. At this time, the first connecting pipe 31, the liquid guide port 333 away from the vacuum oil filling system 2, the one-way filter 34, the liquid guide port 333 close to the vacuum oil filling system 2, and the second connecting pipe 32 together form a passage, and then the staff controls to open the vacuum oil filling system 2, and the vacuum oil filling system 2 sucks the oil and air inside the transformer into its interior through the above-mentioned passage;
[0026] After the vacuum oil filling system 2 extracts the oil and air inside the transformer to the standard value, the staff closes the vacuum oil filling system 2, discharges the oil and air inside the vacuum oil filling system 2, and then injects new oil into the vacuum oil filling system 2. Then the staff first rotates the adjusting shaft 334 close to the vacuum oil filling system 2. The adjusting shaft 334 drives the liquid guide port 333 to rotate through the cylinder 332, so that the two openings of the liquid guide port 333 are connected to the second connecting pipe 32 and the return pipe 35 respectively. Then the staff turns on the vacuum oil filling system 2. At this time, the new oil inside the vacuum oil filling system 2 flows into the return pipe 35 through the second connecting pipe 32 and the liquid guide port 333 under the action of gravity, and squeezes out the air inside the return pipe 35. When the return pipe 333 After the interior of 5 is completely filled with new oil, the staff then rotates the adjusting shaft 334 away from the vacuum oil filling system 2. The adjusting shaft 334 then drives the liquid guide port 333 to rotate through the cylinder 332, and the two openings of the liquid guide port 333 are respectively connected to the first connecting pipe 31 and the return pipe 35. At this time, the interior of the transformer is connected to the return pipe 35 through the first connecting pipe 31 and the liquid guide port 333. Since the interior of the transformer is in a negative pressure state at this time, the external atmospheric pressure quickly drives the new oil in the vacuum oil filling system 2 along the second connecting pipe 32, the liquid guide port 333 close to the vacuum oil filling system 2, the return pipe 35, the liquid guide port 333 away from the vacuum oil filling system 2 and the first connecting pipe 31 into the interior of the transformer, thereby completing the oil filling work;
[0027] To sum up, after the staff completes the oil and air extraction operations, they only need to adjust the first connecting pipe 31 and the second connecting pipe 32 to be connected to the return pipe 35 through the switching mechanism 33. At this time, the vacuum oil filling system 2 can vacuum inject new oil into the interior of the transformer, effectively reducing the influx of external air and impurities into the interior of the transformer, which effectively improves the quality of the transformer vacuum oil filling to ensure the subsequent normal use of the transformer.
[0028] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.
Claims
1. Transformer vacuum oil filling device, characterized in that: include: A lifting platform (1), wherein the upper end of the lifting platform (1) is fixedly connected to a vacuum oil injection system (2); An adjusting device (3), the adjusting device (3) being fixedly connected to and in communication with a surface of the vacuum oil injection system (2); The regulating device (3) comprises a first connecting pipe (31) and a second connecting pipe (32), the second connecting pipe (32) being fixedly connected and communicating with the surface of the vacuum oil injection system (2), the first connecting pipe (31) and the second connecting pipe (32) being fixedly connected and communicating with a switching mechanism (33), the switching mechanism (33) being fixedly connected and communicating with a one-way filter (34) and a return pipe (35), and an auxiliary mechanism (36) being installed on the surface of the switching mechanism (33).
2. The transformer vacuum oil filling device according to claim 1, characterized in that: The switching mechanism (33) comprises two circular boxes (331) respectively fixedly connected between the first connecting pipe (31) and the second connecting pipe (32); the one-way filter (34) and the return pipe (35) are both fixedly connected and communicated with the opposite ends of the two circular boxes (331); the inner wall of the circular box (331) is rotatably connected with a cylinder (332); a surface of the cylinder (332) is provided with a liquid guide port (333); the two openings of the liquid guide port (333) away from the vacuum oil injection system (2) are respectively communicated with the first connecting pipe (31) and the one-way filter (34); the two openings of the liquid guide port (333) close to the vacuum oil injection system (2) are respectively communicated with the one-way filter (34) and the second connecting pipe (32); the upper end of the cylinder (332) is fixedly connected with an adjustment shaft (334); the upper end of the adjustment shaft (334) passes through the outside of the circular box (331).
3. The transformer vacuum oil filling device according to claim 2, characterized in that: The angle between the center points of the two openings of the liquid guide port (333) is one hundred and twenty degrees, the angle between the axis lines of the opposite ends of the one-way filter (34) and the return pipe (35) is one hundred and twenty degrees, and the intersection of the axis lines of the opposite ends of the one-way filter (34) and the return pipe (35), the intersection of the center points of the two openings of adjacent liquid guide ports (333) and the center point of the adjacent cylinder (332) coincide with each other.
4. The transformer vacuum oil filling device according to claim 2, characterized in that: The upper end of the adjustment shaft (334) is fixedly connected to an adjustment handle (335), and the corners of the adjustment handle (335) are rounded.
5. The transformer vacuum oil filling device according to claim 2, characterized in that: The auxiliary mechanism (36) includes a mounting plate (361), the upper ends of the two round boxes (331) are fixedly connected to the mounting plate (361), the interior of the mounting plate (361) is provided with two offset limiting cavities (362), the upper end of the adjusting shaft (334) sequentially passes through the mounting plate (361) and the adjacent limiting cavity (362) and extends to the outside of the mounting plate (361), the surface of the adjusting shaft (334) is fixedly connected with a limiting frame (363) slidably connected to the interior of the adjacent limiting cavity (362), the angle between the two limiting frames (363) is one hundred and twenty degrees, the horizontal cross-section of the limiting cavity (362) is fan-shaped, the arc-shaped inner walls of the two limiting cavities (362) are opposite, and the limiting cavity (362) can provide the limiting frame (363) with a rotation angle of one hundred and twenty degrees.
6. The transformer vacuum oil filling device according to claim 5, characterized in that: Two sliding cavities (364) are provided inside the mounting plate (361) and are respectively connected to the two limiting cavities (362). The inner wall of the sliding cavity (364) is slidably connected to a rack (366). The opposite ends of the two racks (366) are meshedly connected to a gear (365) fixedly connected to the adjacent adjustment shaft (334). The end of the rack (366) close to the one-way filter (34) away from the second connecting pipe (32) is plugged into the limiting frame (363) close to the first connecting pipe (31).