Transformer oil recovery device applied to transformer
By designing a transformer oil recovery device that contains the base oil recycling tube and the foam filter plate, it solves the problem of difficulty recycling and oil pollution of the existing technologies to the bottom of the bottom, and achieves high -efficiency and safe transformer oil recovery effects.
Patent Information
- Application Number
- CN202411412328.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-11
- Publication Date
- 2025-01-21
AI Technical Summary
The existing transformer oil recovery technology has problems such as difficulty in recycling the residual oil at the bottom and polluting the oil quality from the outside air, resulting in poor recycling effects, waste of resources and high recycling costs.
A transformer oil recovery device is designed, including a recovery tank, recovery oil pipe, return air pipe, recovery pump, bottom oil recovery pipe and defoaming filter plate. The bottom oil recovery pipe drives the counterweight block to extend into the inner bottom wall of the transformer. Combined with the design of the movable limit plate and the fixed limit plate, the residual oil at the bottom is efficiently recovered, and the recovery tank is filled with nitrogen to avoid oil oxidation.
It improves the recovery efficiency and effect of transformer oil, reduces the amount of residual oil, avoids oil pollution, reduces the recovery cost, and improves the safety of the recovery process.
Smart Images
Figure CN119330288A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of transformer equipment maintenance, and more particularly to a transformer oil recovery device applied to a transformer. Background Art
[0002] Transformer oil, also known as insulating oil, is a liquid insulating material specially used in power transformers and other high-voltage equipment. Its main functions include insulation, cooling and arc extinguishing. Transformer oil plays a vital role in transformers, ensuring the normal operation of equipment and extending its service life. Recycling transformer oil in transformers can be recycled, saving use costs and avoiding environmental pollution.
[0003] The recovered transformer oil can be treated to restore its performance, and can ensure the normal operation of the transformer after being re-injected into the transformer. Transformer oil plays an important role in insulation, heat dissipation and arc extinguishing in the transformer. If it is not recycled and replaced with new oil every time, the performance of the transformer may be affected due to the compatibility problem between the new oil and the internal components of the transformer. Due to the long-term use environment factors, the performance of the transformer oil gradually cannot meet the use requirements of the transformer. At present, the recovery of transformer oil is mostly directly sucked and drained by connecting the oil drain pipe of the transformer. First of all, due to the design of the transformer oil tank, it is easy to cause some residue at the bottom, resulting in poor recovery and replacement of transformer oil, affecting the use effect of subsequent addition of transformer oil, and causing waste of resources and increasing the recovery cost. In addition, during the suction process, external gas enters the interior of the transformer, which easily causes oxidation of the transformer oil, making it difficult to recycle and reuse the transformer oil. Summary of the invention
[0004] In view of the problems existing in the prior art, the purpose of the present invention is to provide a transformer oil recovery device applied to a transformer to solve the background technical problems.
[0005] To achieve the above object, the present invention adopts the following technical solution.
[0006] A transformer oil recovery device applied to a transformer comprises a recovery tank, on which a recovery oil pipe and a return air pipe are fixedly installed, wherein the recovery oil pipe and the return air pipe are respectively used to connect with a transformer oil discharge pipe and a transformer oil adding pipe on the transformer, a recovery pump is fixedly installed inside the recovery tank, a bottom oil recovery pipe is arranged inside the recovery oil pipe, a counterweight is fixedly installed at one end of the bottom oil recovery pipe, an active limiting plate is fixedly installed at the other end of the bottom oil recovery pipe, a fixed limiting plate is fixedly installed inside the recovery oil pipe, the bottom oil recovery pipe is inserted through the fixed limiting plate, wherein the active limiting plate is located on the left side of the fixed limiting plate, an operating rod is rotatably connected to the recovery tank, one end of the operating rod located inside the recovery tank is threadedly connected with a push rod, the other end of the push rod is fixedly connected to the active limiting plate, and a defoaming filter plate is fixedly installed inside the recovery tank.
[0007] As a further description of the above technical solution: The counterweight block is formed by an elliptical plate and two semicircular plates formed in one piece, the oil recovery pipe is connected to the interior of the elliptical plate, the two semicircular plates are provided with V-shaped holes in opposite directions, and the two V-shaped holes are both connected to the interior of the elliptical plate.
[0008] As a further description of the above technical solution: The movable limiting plate and the fixed limiting plate are both provided with evenly distributed liquid passage openings, wherein the liquid passage openings on the movable limiting plate and the fixed limiting plate are staggered and do not overlap each other.
[0009] As a further description of the above technical solution: A convex block matching the liquid passage port is integrally formed on one side of the movable limiting plate opposite to the fixed limiting plate, and a sealing rubber ring is fixedly connected to the convex block.
[0010] As a further description of the above technical solution: A limiting strip is integrally formed inside the oil recovery pipe, and a notch matching the limiting strip is arranged on the movable limiting plate. The limiting strip is located inside the notch and is in smooth contact with the inner wall of the notch.
[0011] As a further description of the above technical solution: The bottom oil recovery pipe is a rubber pipe, and support rings arranged at equal distances are fixedly installed on the inner side of the bottom oil recovery pipe.
[0012] As a further description of the above technical solution: The interior of the recovery tank is filled with nitrogen.
[0013] Compared with the prior art, the advantages of the present invention are: (1) This solution, for transformers in which the oil drain pipe is set at a height slightly higher than the bottom wall of the transformer, can facilitate the recovery of the transformer oil remaining at the bottom, thereby facilitating the replacement of the transformer oil in the transformer and improving the efficiency and effect of transformer oil recovery.
[0014] (2) In this scheme, a cycle is formed between the recycling device and the transformer during the recycling process to avoid contact between external air and transformer oil, thereby preventing the recycled transformer oil from being contaminated by external air, and ensuring the safety of the recycling process by filling with nitrogen. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a front view cross-sectional structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of the internal structure of the oil recovery pipe of the present invention; Figure 3 It is a structural schematic diagram of the counterweight block of the present invention; Figure 4 For the present invention Figure 2 Schematic diagram of the enlarged structure of part A in the middle.
[0016] Description of the numbers in the figure: 1. Recovery tank; 2. Recovery oil pipe; 21. Limiting strip; 3. Return air pipe; 4. Recovery pump; 5. Bottom oil recovery pipe; 51. Support ring; 6. Counterweight; 61. Elliptical plate; 62. Semicircular plate; 63. V-shaped hole; 7. Movable limiting plate; 71. Notch; 8. Fixed limiting plate; 9. Operating lever; 10. Push rod; 11. Defoaming filter plate; 12. Liquid port; 13. Bump; 14. Sealing rubber ring. DETAILED DESCRIPTION
[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.
[0018] See also Figure 1-4In the present invention, a transformer oil recovery device applied to a transformer comprises a recovery tank 1, on which a recovery oil pipe 2 and a return air pipe 3 are fixedly installed, wherein the recovery oil pipe 2 and the return air pipe 3 are respectively used to connect with the transformer oil discharge pipe and the transformer oil adding pipe on the transformer, a recovery pump 4 is fixedly installed inside the recovery tank 1, a bottom oil recovery pipe 5 is arranged inside the recovery oil pipe 2, a counterweight block 6 is fixedly installed at one end of the bottom oil recovery pipe 5, an active limiting plate 7 is fixedly installed at the other end of the bottom oil recovery pipe 5, a fixed limiting plate 8 is fixedly installed inside the recovery oil pipe 2, the bottom oil recovery pipe 5 is inserted on the fixed limiting plate 8, wherein the active limiting plate 7 is located on the left side of the fixed limiting plate 8, an operating rod 9 is rotatably connected to the recovery tank 1, and a push rod 10 is threadedly connected to one end of the operating rod 9 located inside the recovery tank 1, and the other end of the push rod 10 is fixedly connected to the active limiting plate 7, and a defoaming filter plate 11 is fixedly installed inside the recovery tank 1.
[0019] In the present invention, the oil recovery pipe 2 and the return air pipe 3 are respectively connected to the transformer oil discharge pipe and the transformer oil addition pipe on the transformer, and then the transformer oil discharge pipe is opened. After the recovery pump 4 is powered on, the air inside the recovery tank 1 is input into the transformer to form a positive and negative pressure difference, so that the transformer oil in the transformer enters the interior of the recovery tank 1 through the oil recovery pipe 2. After the transformer oil in the transformer is recovered to a certain extent, that is, after the transformer oil level in the transformer drops to the height of its transformer oil discharge pipe, or there is residual transformer oil in other recessed parts in the transformer, the operating rod 9 is rotated, and the threaded connection between the operating rod 9 and the push rod 10 is utilized to allow the push rod 10 to drive the movable limiting plate 7 to approach until it is fitted and fixed. The limiting plate 8 completes the blocking of the oil recovery pipe 2, wherein the negative pressure suction guide of the recovery tank 1 is converted from the pipe mouth of the oil recovery pipe 2 to the bottom oil recovery pipe 5, and during the movement of the movable limiting plate 7, the bottom oil recovery pipe 5 drives the counterweight block 6 to extend into the interior of the transformer, and the bottom oil recovery pipe 5 is driven to bend through the gravity of the counterweight block 6 until the counterweight block 6 touches the inner bottom wall of the transformer, thereby facilitating the recovery of transformer oil through the holes on the counterweight block 6, improving the recovery degree of transformer oil in the transformer, reducing the residual transformer oil in the transformer, thereby reducing the degree of contamination of the newly added transformer oil by the original transformer oil, and improving the transformer oil recovery effect, reducing the waste of recovered transformer oil.
[0020] Due to the arrangement of the movable limiting plate 7 and the fixed limiting plate 8, and the recovery method of the counterweight block 6, it is easy for the recovered transformer oil to generate bubbles that occupy space, causing it to enter the transformer for the second time and prolong the recovery time of the transformer oil. The generated transformer oil bubbles are eliminated by the defoaming filter plate 11.
[0021] See also Figure 1 and Figure 3, wherein: the counterweight block 6 is formed by an elliptical plate 61 and two semicircular plates 62 formed in one piece, the oil recovery pipe 2 is connected to the inside of the elliptical plate 61, and the two semicircular plates 62 are provided with V-shaped holes 63 in opposite directions, and the two V-shaped holes 63 are both connected to the inside of the elliptical plate 61.
[0022] In the present invention, the elliptical plate 61 can facilitate access to the opening of the oil recovery pipe 2, and the semicircular plate 62 can avoid completely fitting the inner wall or inner bottom wall of the transformer, thereby exposing the opening of the V-shaped hole 63, which is convenient for absorbing the residual transformer oil, so as to reduce the residual amount of transformer oil in the transformer, that is, improve the recovery efficiency and increase the recovery effect.
[0023] See also Figure 2 , wherein: the movable limiting plate 7 and the fixed limiting plate 8 are both provided with uniformly distributed liquid passage openings 12, wherein the liquid passage openings 12 on the movable limiting plate 7 and the fixed limiting plate 8 are staggered, and the liquid passage openings 12 on the movable limiting plate 7 and the fixed limiting plate 8 do not overlap each other.
[0024] In the present invention, when the movable limiting plate 7 and the fixed limiting plate 8 are separated, the liquid through ports 12 on both are in an unobstructed state, so the two ends of the recovery oil pipe 2 can be directly connected at this time. At this time, the negative pressure in the recovery tank 1 is mainly used to recover the transformer oil through the recovery oil pipe 2. When the movable limiting plate 7 and the fixed limiting plate 8 are fitted together, since the liquid through ports 12 are staggered and non-overlapping, one side of the liquid through ports 12 is blocked, and then the recovery oil pipe 2 is closed, and only the bottom oil recovery pipe 5 is used as a connecting channel. The negative pressure in the recovery tank 1 completely acts on the bottom oil recovery pipe 5 with a narrower diameter, thereby improving the recovery effect of residual hydraulic oil.
[0025] See also Figure 2 , wherein: a convex block 13 matching the liquid passage 12 is integrally formed on one side of the movable limiting plate 7 and the fixed limiting plate 8 , and a sealing rubber ring 14 is fixedly connected to the convex block 13 .
[0026] In the present invention, when the movable limiting plate 7 and the fixed limiting plate 8 are close to each other, the protrusion 13 can enter the liquid passage 12 opposite thereto, and further seal the gap through the sealing rubber ring 14, thereby improving the sealing effect on the recovery oil pipe 2.
[0027] See also Figure 2 and Figure 4 , wherein: a limiting strip 21 is integrally formed inside the oil recovery pipe 2 , a notch 71 matching the limiting strip 21 is provided on the movable limiting plate 7 , the limiting strip 21 is located on the inner side of the notch 71 and in smooth contact with the inner wall of the notch 71 .
[0028] In the present invention, the cooperation between the limiting strip 21 and the notch 71 can prevent the movable limiting plate 7 and the push rod 10 from rotating with the rotation of the operating rod 9, ensuring that the rotating operating rod 9 can push the movable limiting plate 7 to move inside the recovery oil pipe 2.
[0029] See also Figure 1-3 , wherein: the bottom oil recovery pipe 5 is a rubber pipe, and support rings 51 arranged at equal distances are fixedly installed on the inner side of the bottom oil recovery pipe 5.
[0030] In the present invention, the rubber tube has good elasticity, so that the bottom oil recovery tube 5 can be bent by the gravity of the counterweight block 6, and the support ring 51 can prevent the bottom oil recovery tube 5 from being bent and unable to infuse liquid when the bottom oil recovery tube 5 is bent.
[0031] See also Figure 1-4 , wherein: the interior of the recovery tank 1 is filled with nitrogen.
[0032] In the present invention, the chemical property of nitrogen is stable and has good electrical insulation. The filling of nitrogen in the process of recovering transformer oil in the transformer can avoid the generation of arcs and improve the safety of the transformer oil recovery process.
[0033] The above is only a preferred specific implementation of the present invention; however, the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and its improved conception within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.
Claims
1. A transformer oil recovery device applied to a transformer, comprising a recovery tank (1), wherein a recovery oil pipe (2) and a return air pipe (3) are fixedly mounted on the recovery tank (1), wherein the recovery oil pipe (2) and the return air pipe (3) are respectively used to connect to a transformer oil discharge pipe and a transformer oil addition pipe on the transformer, and characterized in that: A recovery pump (4) is fixedly installed inside the recovery tank (1); a bottom oil recovery pipe (5) is arranged inside the recovery oil pipe (2); a counterweight block (6) is fixedly installed on one end of the bottom oil recovery pipe (5); a movable limiting plate (7) is fixedly installed on the other end of the bottom oil recovery pipe (5); a fixed limiting plate (8) is fixedly installed inside the recovery oil pipe (2); the bottom oil recovery pipe (5) is inserted into the fixed limiting plate (8), wherein the movable limiting plate (7) is located on the left side of the fixed limiting plate (8); an operating rod (9) is rotatably connected to the recovery tank (1); one end of the operating rod (9) located inside the recovery tank (1) is threadedly connected to a push rod (10); the other end of the push rod (10) is fixedly connected to the movable limiting plate (7); and a defoaming filter plate (11) is fixedly installed inside the recovery tank (1).
2. The transformer oil recovery device applied to a transformer according to claim 1, characterized in that: The counterweight block (6) is formed integrally of an elliptical plate (61) and two semicircular plates (62); the oil recovery pipe (2) is connected to the interior of the elliptical plate (61); the two semicircular plates (62) are provided with V-shaped holes (63) in opposite directions; the two V-shaped holes (63) are both connected to the interior of the elliptical plate (61).
3. The transformer oil recovery device applied to a transformer according to claim 1, characterized in that: The movable limiting plate (7) and the fixed limiting plate (8) are both provided with uniformly distributed liquid passage openings (12), wherein the liquid passage openings (12) on the movable limiting plate (7) and the fixed limiting plate (8) are arranged in a staggered manner, and the liquid passage openings (12) on the movable limiting plate (7) and the fixed limiting plate (8) do not overlap each other.
4. The transformer oil recovery device applied to a transformer according to claim 1, characterized in that: A convex block (13) matching the liquid passage port (12) is integrally formed on one side of the movable limiting plate (7) and the fixed limiting plate (8), and a sealing rubber ring (14) is fixedly connected to the convex block (13).
5. The transformer oil recovery device applied to a transformer according to claim 1, characterized in that: A limiting strip (21) is integrally formed inside the oil recovery pipe (2), and a notch (71) matching the limiting strip (21) is provided on the movable limiting plate (7), wherein the limiting strip (21) is located inside the notch (71) and is in smooth contact with the inner wall of the notch (71).
6. The transformer oil recovery device applied to a transformer according to claim 1, characterized in that: The bottom oil recovery pipe (5) is a rubber pipe, and support rings (51) arranged at equal distances are fixedly mounted on the inner side of the bottom oil recovery pipe (5).
7. The transformer oil recovery device applied to a transformer according to claim 1, characterized in that: The interior of the recovery tank (1) is filled with nitrogen.