Vacuum on-load tap-changer capable of rapidly supplementing oil

Abstract

The utility model provides a vacuum on-load tap-changer capable of rapidly recharging oil, which relates to the technical field of oil recharging of vacuum on-load tap-changers, and comprises an on-load tap-changer oil chamber, an oil recharging tank for storing new oil, an oil storage tank for storing waste oil and a pump body, an oil inlet and an oil outlet of the pump body are respectively provided with a switching channel, and each switching channel comprises an inner ring. A plurality of connectors distributed in an annular array are fixedly connected to the outer side wall of the inner ring in a penetrating mode, an inserting tooth ring moves in the direction away from the inner ring to drive a U-shaped rack to move, the U-shaped rack drives a connecting gear to rotate when moving, and then a strip-shaped rack connected with the connecting gear in a meshed mode drives an inserting pipe to ascend. Therefore, the sealing gasket can be moved to the joint of the sealing connector and the bent pipe.

Description

Technical Field

[0001] The utility model relates to the technical field of oil filling for on-load tap-changers in vacuum, in particular to an on-load tap-changer in vacuum with rapid oil filling. Background Art

[0002] An on-load tap-changer in vacuum is a device that can perform tap-changing under the live state of a transformer. Its main function is to change the output voltage of the transformer without interrupting the load current. After long-term operation, the oil may deteriorate due to contact with high temperature or other factors, losing its original insulation and cooling performance, and new oil needs to be replenished to maintain the oil level and oil quality in the oil chamber.

[0003] Therefore, an on-load tap-changer oil sample detection and oil filling system, with the publication number: CN210199108U, the oil chamber of the on-load tap-changer is also connected with an oil filling tank through an oil filling pipe. An oil supply pump connected to a controller is arranged on the oil filling pipe. A second flowmeter is also connected to the oil filling pipe, and the second flowmeter is connected to the controller. The controller can control the oil supply pump to pump insulating oil into the oil chamber of the on-load tap-changer equal to the discharge amount of the drain pipe. The controller pumps oil into the oil chamber of the on-load tap-changer through the controllable oil supply pump, and at the same time detects the input amount through the second flowmeter, so that the output amount detected by the first flowmeter is equal to the input amount detected by the second flowmeter, ensuring the normal operation of the on-load tap-changer.

[0004] However, when discharging the old oil and replenishing new oil at the same time, since the old oil in the tap-changer cannot be quickly discharged, the replenished new oil will be mixed with the old oil that has not been discharged in time in the tap-changer. Even if the amount of old oil in the tap-changer decreases, the remaining old oil will still cause the quality of the added new oil to deteriorate and not meet the use standard, resulting in the need for the added new oil to be recycled until the content of the old oil in the tap-changer decreases, that is, the amount of old oil contained in the replenished new oil is greatly reduced and can meet the use standard, that is, the oil filling speed in the prior art is relatively slow. Summary of the Utility Model

[0005] The purpose of the utility model is to solve the problems existing in the prior art, and to propose an on-load tap-changer in vacuum with rapid oil filling.

[0006] To achieve the above object, the utility model adopts the following technical solutions: A vacuum on-load tap-changer for rapid oil replenishment, comprising an on-load tap-changer oil chamber, an oil replenishment tank for storing new oil, an oil storage tank for storing waste oil, and a pump body. Conversion channels are installed at both the inlet and outlet of the pump body. The conversion channel includes an inner ring. A plurality of connection heads are fixedly connected through the outer side wall of the inner ring in an annular array distribution. An outer ring concentric with the central axis of the inner ring cylinder is fixedly connected to the plurality of connection heads. A transmission shaft is rotatably connected through the central axis position at one end of the inner ring. One end of the transmission shaft is fixedly connected with a bent pipe. One end of the bent pipe is rotatably connected to the inlet and outlet of the pump body, and the other end is used to align with the connection head on the inner ring. The inlet and outlet of the oil storage tank, the oil replenishment tank, and the on-load tap-changer oil chamber are connected to the connection head ports through pipelines.

[0007] Preferably, an insertion pipe is inserted into the outer wall of the other end of the bent pipe. A sealing gasket for sealing the butt joint port between the bent pipe and the connection head is fixedly connected to one end of the insertion pipe.

[0008] Preferably, a strip-shaped rack is fixedly connected to the other end of the insertion pipe and penetrates through the transmission shaft. The part of the transmission shaft located outside the inner ring is block-shaped and has a hollow end face. The strip-shaped rack passes through the hollow part of the transmission shaft, and a connection gear meshing with the strip-shaped rack is rotatably connected to the hollow part of the transmission shaft. A plug-in gear ring is inserted into the block-shaped part of the transmission shaft. A U-shaped rack fixedly connected to the inner wall of the plug-in gear ring and inserted into the transmission shaft and meshing with the connection gear is provided.

[0009] Preferably, the U-shaped rack is vertically distributed with respect to the strip-shaped rack, and the relative inner walls of the U-shaped rack have a clearance fit with the side of the strip-shaped rack.

[0010] Preferably, a double-shaft motor is fixedly connected to the pump body housing. The two main shafts of the double-shaft motor extend towards the two inner rings respectively and are fixedly connected with telescopic rods. A driving gear is fixedly connected to the telescopic end of the telescopic rod.

[0011] Preferably, an electric push rod is fixedly connected to extend outwards from the inner wall of the inner ring. A sliding seat is fixedly connected to the telescopic end of the electric push rod. A transition gear ring meshing with the plug-in gear ring and the driving gear is rotatably connected to one side of the sliding seat.

[0012] Preferably, the plug-in gear ring and the driving gear are located on both sides of the transition gear ring and are respectively rotatably connected to both ends of the sliding seat.

[0013] Compared with the prior art, the advantages and positive effects of the utility model are as follows.

[0014] 1. In the present utility model, the oil inlet and outlet of the oil storage tank, the oil replenishment tank, and the on-load tap-changer oil chamber are connected through several pipelines, and the corresponding pipelines are connected to the connection head ports on both outer rings. During use, by rotating two elbows to contact the other ends of the connection heads at different positions, the waste oil in the on-load tap-changer oil chamber can be pumped into the oil storage tank by the pump body. Then, by adjusting the positions of the elbows, the new oil in the oil replenishment tank can be pumped into the on-load tap-changer oil chamber, or by adjusting the positions of the elbows again, the waste oil in the oil storage tank can be sent into the oil replenishment tank for recycling after being processed. By adopting the method of pumping first and then replenishing, it is ensured that the newly added oil will not be wasted.

[0015] 2. In the present utility model, the inserted tooth ring moves away from the inner ring, thereby driving the U-shaped rack to move. When the U-shaped rack moves, it drives the connecting gear to rotate, and then the strip-shaped rack engaged with the connecting gear drives the insertion tube to rise, so that the sealing gasket can move to the connection between the sealing connector and the elbow. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a three-dimensional structural schematic diagram of a vacuum on-load tap-changer with rapid oil replenishment proposed by the present utility model;

[0017] Figure 2 is a vacuum on-load tap-changer with rapid oil replenishment proposed by the present utility model Figure 1 of the rear view structural schematic diagram;

[0018] Figure 3 is a structural schematic diagram of the outer ring of a vacuum on-load tap-changer with rapid oil replenishment proposed by the present utility model;

[0019] Figure 4 is Figure 3 of the sectional view;

[0020] Figure 5 is Figure 4 of the rear sectional view;

[0021] Figure 6 is Figure 4 the enlarged view of A in

[0022] Legend: 1. Oil storage tank; 2. Oil replenishment tank; 3. On-load tap-changer oil chamber; 4. Pipeline; 5. Outer ring; 6. Pump body; 7. Connection head; 8. Inner ring; 9. Elbow; 10. Inserted tooth ring; 11. Transition tooth ring; 12. Driving gear; 13. Electric push rod; 14. Telescopic rod; 15. Biaxial motor; 16. Strip-shaped rack; 17. Connecting gear; 18. U-shaped rack; 19. Insertion tube; 20. Sealing gasket; 21. Transmission shaft; 22. Sliding seat. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] In order to more clearly understand the above-mentioned objects, features and advantages of the present utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.

[0024] In the following description, many specific details are set forth in order to fully understand the present utility model. However, the present utility model may also be implemented in other ways different from those described herein. Therefore, the present utility model is not limited to the limitations of the specific embodiments disclosed in the following specification.

[0025] As Figures 1-6 shown, a vacuum on-load tap-changer with rapid oil replenishment includes an on-load tap-changer oil chamber 3, an oil replenishment tank 2 for storing new oil, an oil storage tank 1 for storing waste oil, and a pump body 6. Conversion channels are installed at both the inlet and outlet of the pump body 6. The conversion channel includes an inner ring 8. A plurality of connecting heads 7 distributed in a circular array are fixedly connected through the outer side wall of the inner ring 8. An outer ring 5 concentric with the inner ring 8 is fixedly connected to the plurality of connecting heads 7. A transmission shaft 21 is rotatably connected through the center axis position at one end of the inner ring 8. One end of the transmission shaft 21 is fixedly connected with an elbow pipe 9. One end of the elbow pipe 9 is rotatably connected to the inlet and outlet of the pump body 6, and the other end is used to align with the connecting head 7 on the inner ring 8. The inlet and outlet of the oil storage tank 1, the oil replenishment tank 2, and the on-load tap-changer oil chamber 3 are connected to the port of the connecting head 7 through a pipeline 4:

[0026] During use, two connecting heads 7 located in the direction of the coincident central axis of the two outer rings 5 on the two outer rings 5 are used in cooperation to Figure 3For example, the other ends of the two elbow pipes 9 are simultaneously rotated to be connected to the bottom end of the uppermost connector 7. That is, when the pump body 6 is started at this time, the left connector 7 is used as the feed port, and the right connector 7 is used as the discharge port. Therefore, the two elbow pipes 9 can be simultaneously rotated to cooperate with the end faces of the connectors 7 at different positions. Therefore, in use, the oil outlet of the on-load tap-changer oil chamber 3 is connected to one of the connectors 7 on the left outer ring 5 by the pipeline 4, and then the other pipeline 4 is used to connect the oil inlet of the storage tank 1 to the corresponding connector 7 on the right outer ring 5. Then, two pipelines 4 are used to connect the oil outlet of the storage tank 1 to the oil inlet of the make-up tank 2 respectively, and the other ends of the two pipelines 4 are respectively connected to the ports of the connectors 7 that are matched at another position on the left and right outer rings 5. Then, two pipelines 4 are used to connect the oil outlet of the make-up tank 2 to the oil inlet of the on-load tap-changer oil chamber 3, and the other ends of the two pipelines 4 are respectively connected to the ports of the connectors 7 that are matched at another position on the left and right outer rings 5. That is, in actual use, by rotating the elbow pipe 9 so that the port is aligned with the connectors 7 at different positions, the waste oil in the on-load tap-changer oil chamber 3 can be pumped into the storage tank 1 by the pump body 6. Then, by adjusting the position of the elbow pipe 9, the new oil in the make-up tank 2 can be pumped into the on-load tap-changer oil chamber 3, or by adjusting the position of the elbow pipe 9 again, the waste oil in the storage tank 1 can be sent to the make-up tank 2 for recycling after being treated. And for the convenience of recycling, the oil outlet of the storage tank 1 is connected to an impurity removal filter and a water removal filter. That is, this scheme adopts the method of pumping first and then replenishing to ensure that the added new oil will not be wasted.

[0027] Further, in order to ensure the seal at the joint: a plug pipe 19 is inserted into the outer wall of the other end of the elbow pipe 9, and a sealing gasket 20 for sealing the butt joint port of the elbow pipe 9 and the connector 7 is fixedly connected to one end of the plug pipe 19.

[0028] The other end of the plug pipe 19 is fixedly connected to a strip-shaped rack 16 that penetrates the transmission shaft 21. The part of the transmission shaft 21 located outside the inner ring 8 is block-shaped and the end face is hollow. The strip-shaped rack 16 passes through the hollow part of the transmission shaft 21, and a connecting gear 17 that meshes with the strip-shaped rack 16 is rotatably connected to the hollow part of the transmission shaft 21. A plug-in gear ring 10 is inserted into the block-shaped part of the transmission shaft 21, and a U-shaped rack 18 that is fixedly connected to the inner wall of the plug-in gear ring 10 and is inserted into the transmission shaft 21 and meshes with the connecting gear 17 is provided.

[0029] The U-shaped rack 18 and the strip-shaped rack 16 are vertically distributed, and the relative inner walls of the U-shaped rack 18 and the side of the strip-shaped rack 16 are in clearance fit.

[0030] During actual use, the insertion tooth ring 10 moves away from the inner ring 8, thereby driving the U-shaped rack 18 to move. When the U-shaped rack 18 moves, it drives the connecting gear 17 to rotate, and then the strip-shaped rack 16 engaged with the connecting gear 17 drives the insertion tube 19 to rise, so that the sealing gasket 20 can be moved to the connection between the sealing connector 7 and the elbow 9. Conversely, when the insertion tooth ring 10 moves towards the inner ring 8, the sealing gasket 20 can be lowered to facilitate the rotation and position adjustment of the elbow 9.

[0031] Furthermore, in order to achieve the function switching of the pump body 6: A double-shaft motor 15 is fixedly connected to the housing of the pump body 6. The two main shafts of the double-shaft motor 15 extend towards the two inner rings 8 respectively and are fixedly connected with telescopic rods 14. The telescopic ends of the telescopic rods 14 are fixedly connected with driving gears 12.

[0032] The inner wall of the inner ring 8 extends outward and is fixedly connected with an electric push rod 13. The telescopic end of the electric push rod 13 is fixedly connected with a sliding seat 22. One side of the sliding seat 22 is rotatably connected with a transition tooth ring 11 that is engaged with the insertion tooth ring 10 and the driving gear 12.

[0033] The insertion tooth ring 10 and the driving gear 12 are located on both sides of the transition tooth ring 11 and are respectively rotatably connected to both ends of the sliding seat 22:

[0034] During actual use: The double-shaft motor 15 drives the telescopic rod 14 to rotate, and then the driving gear 12 rotates. Under the meshing connection of the transition tooth ring 11, the insertion tooth ring 10 rotates. By using the insertion of the insertion tooth ring 10 into the block-shaped part of the transmission shaft 21, the transmission shaft 21 rotates, and then the elbow 9 rotates. In order to drive the sealing gasket 20 to disengage from the inner wall of the inner ring 8 when the elbow 9 rotates, the electric push rod 13 contracts to realize the sliding seat 22 driving the transition tooth ring 11 to move. At the same time, the insertion tooth ring 10 rotatably connected to the end of the sliding seat 22 realizes movement by inserting into the block-shaped part of the transmission shaft 21, and the driving gear 12 at the other end realizes synchronous movement by the telescopic movement of the telescopic rod 14.

[0035] Working principle: Use multiple pipes 4 to connect the oil inlets and outlets of the oil storage tank 1, the supplementary oil tank 2, and the on-load tap-changer oil chamber 3, and the corresponding pipes 4 are cooperatively installed with the connectors 7 on the two outer rings 5. During use, the double-shaft motor 15 is used to drive the two elbows 9 to rotate and connect with the other ends of the corresponding connectors 7, and then the sealing gasket 20 is used for sealing. By adjusting the position of the elbow 9, the new oil in the supplementary oil tank 2 can be pumped into the on-load tap-changer oil chamber 3, or by adjusting the position of the elbow 9 again, the waste oil in the oil storage tank 1 can be sent to the supplementary oil tank 2 for recycling after treatment.

[0036] The wiring diagrams of the pump body 6, the electric push rod 13, and the double-shaft motor 15 in the present utility model belong to the common general knowledge in the art. Their working principles are already well-known technologies, and their models are selected according to actual use. Therefore, the control methods and wiring arrangements of the pump body 6, the electric push rod 13, and the double-shaft motor 15 will not be explained in detail.

[0037] The above are only the preferred embodiments of the present utility model, and are not intended to limit the present utility model in any other form. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as they do not depart from the technical content of the technical solution of the present utility model, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A vacuum on-load tap-changer for rapid oil replenishment, comprising an on-load tap-changer oil chamber (3), an oil replenishment tank (2) for storing new oil, an oil storage tank (1) for storing waste oil, and a pump body (6), characterized in that: Conversion channels are installed at both the inlet and outlet of the pump body (6). The conversion channel includes an inner ring (8), and a plurality of connector heads (7) distributed in an annular array are fixedly connected through the outer side wall of the inner ring (8); An outer ring (5) concentric with the inner ring (8) is fixedly connected to a plurality of the connector heads (7). A transmission shaft (21) is rotatably connected through the central axis position at one end of the inner ring (8), and a bent pipe (9) is fixedly connected to one end of the transmission shaft (21); One end of the bent pipe (9) is rotatably connected to the inlet and outlet of the pump body (6), and the other end is used to align with the connector head (7) on the inner ring (8). The inlet and outlet of the oil storage tank (1), the oil replenishment tank (2), and the on-load tap-changer oil chamber (3) are connected to the port of the connector head (7) through a pipeline (4).

2. The on-load tap-changer with vacuum for rapid oil replenishment according to claim 1, characterized in that: An insertion pipe (19) is inserted into the outer wall of the other end of the bent pipe (9), and a sealing gasket (20) for sealing the docking port of the bent pipe (9) and the connector head (7) is fixedly connected to one end of the insertion pipe (19).

3. The on-load tap-changer with vacuum for rapid oil replenishment according to claim 2, characterized in that: A strip-shaped rack (16) penetrating the transmission shaft (21) is fixedly connected to the other end of the insertion pipe (19). The part of the transmission shaft (21) outside the inner ring (8) is block-shaped and hollow at the end face. The strip-shaped rack (16) passes through the hollow part of the transmission shaft (21), and a connecting gear (17) meshing with the strip-shaped rack (16) is rotatably connected to the hollow part of the transmission shaft (21). A plug-in tooth ring (10) is inserted into the block-shaped part of the transmission shaft (21), and a U-shaped rack (18) fixedly connected to the inner wall of the plug-in tooth ring (10) and inserted and meshing with the transmission shaft (21) and the connecting gear (17) is fixedly connected to the inner wall of the plug-in tooth ring (10).

4. The on-load tap-changer with vacuum for rapid oil replenishment according to claim 3, characterized in that: The U-shaped rack (18) is vertically distributed with the strip-shaped rack (16), and the relative inner walls of the U-shaped rack (18) are in clearance fit with the side of the strip-shaped rack (16).

5. The on-load tap-changer with vacuum for rapid oil replenishment according to claim 1, characterized in that: A double-shaft motor (15) is fixedly connected to the shell of the pump body (6). The two main shafts of the double-shaft motor (15) extend towards the two inner rings (8) respectively and are fixedly connected with telescopic rods (14), and a driving gear (12) is fixedly connected to the telescopic end of the telescopic rod (14).

6. The on-load tap-changer with vacuum for rapid oil replenishment according to claim 5, characterized in that: An electric push rod (13) is fixedly connected to the inner wall of the inner ring (8) and extends outwards. A sliding seat (22) is fixedly connected to the telescopic end of the electric push rod (13), and a transition tooth ring (11) meshing with the plug-in tooth ring (10) and the driving gear (12) is rotatably connected to one side of the sliding seat (22).

7. The on-load tap-changer with vacuum for rapid oil replenishment according to claim 6, characterized in that: The plug-in tooth ring (10) and the driving gear (12) are located on both sides of the transition tooth ring (11) and are respectively rotatably connected to both ends of the sliding seat (22).

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