Switch arrangement structure of 500kV side-column voltage regulation single-phase transformer

Abstract

The utility model provides a switch arrangement structure of a 500kV side column voltage regulation single-phase transformer, which comprises an oil tank and an internal iron core clamping piece, the iron core clamping piece is connected with a side column and a main column, and a voltage regulation switch is fixedly arranged at the end part of a high-voltage side and is close to the side column; the low-pressure ascending flanged base is fixedly mounted on the low-pressure side wall of the oil tank through a pipe joint welded on the side wall of the oil tank; an oil tank protruding structure is arranged on the upper portion of the end, close to the voltage regulating switch, of the high-voltage side of the oil tank and the tank cover, the medium-voltage ascending flanged base is fixedly arranged on the tank cover protruding structure, and the medium-voltage sleeve is installed in the medium-voltage ascending flanged base and the oil tank protruding structure. And the high-voltage bushing is mounted at the end part of one side, close to the high-voltage side wall, of the tank cover of the oil tank and far away from the pressure regulating switch. The size of the oil tank is reduced, the volume of the oil tank is reduced, and the use amount of transformer oil and steel is reduced; according to the utility model, the distance between the voltage regulating switch and the main column tapping head is shortened, the lead path is optimized, a lead clamp and a lead cable are saved, the error rate is reduced, and the economical efficiency and the safety are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of transformers, and particularly relates to a switch arrangement structure of a 500kV side-column voltage-regulating single-phase transformer. Background Art

[0002] In a conventional 500kV single-phase transformer, when voltage regulation is carried out by means of side-column voltage regulation, the voltage-regulating switch is usually arranged at the middle position in the short-axis direction near the end of the long-axis direction of the oil tank. In this kind of switch arrangement structure, after ensuring the insulation distance from the voltage-regulating switch to the inner wall of the oil tank and the mechanical distance from the voltage-regulating switch to the side column, the overall length dimension of the oil tank is relatively large, and the consumption of transformer oil and steel is relatively large. The outermost coil of the side column is the voltage-regulating coil, and the voltage-regulating switch is connected to the tapping head on the voltage-regulating coil through a lead. The voltage difference between the two is not large. Therefore, the distance from the voltage-regulating switch to the side column mainly considers whether the lead can be successfully routed and connected to the voltage-regulating switch; at the same time, it is also impossible to clamp and connect the tapping lead of the voltage-regulating switch by welding a fixing plate on the core clamping piece, and the tapping heads are limited to the space around the voltage-regulating switch and can only be distributed on both sides of the voltage-regulating switch. The path from the tapping head to the voltage-regulating switch is relatively complex, and only a large number of wire clips can be used to build a bracket to support the tapping lead; finally, the tapping head on the main column is far from the voltage-regulating switch, and the lead length is relatively long. Based on the last two points, the design difficulty is increased, and the error rate also rises accordingly. Summary of the Invention

[0003] In view of the above technical problems, in order to reduce the cost of the transformer, ensure the quality of the transformer, and improve the market competitiveness of the product, the utility model aims to design a new switch arrangement structure of a 500kV side-column voltage-regulating single-phase transformer. The technical solution adopted by the utility model is as follows:

[0004] A switch arrangement structure of a 500kV side-column voltage-regulating single-phase transformer, the 500kV side-column voltage-regulating single-phase transformer includes an oil tank, a core clamping piece is arranged inside the oil tank, the core clamping piece is fixedly connected with the side column and the main column, a plurality of tapping heads are respectively arranged on the side column and the main column, the voltage-regulating switch is fixedly installed at a position near the side column at the high-voltage side end; the low-voltage riser is fixedly installed on the low-voltage side wall of the oil tank through a pipe joint welded on the side wall of the oil tank, a pair of low-voltage bushings are fixedly installed in the low-voltage riser, and the low-voltage riser communicates with the inside of the oil tank; an oil tank protruding structure is arranged at the upper part of the end of the high-voltage side of the oil tank near the voltage-regulating switch, a cover protruding structure matching the oil tank protruding structure is arranged on the cover of the oil tank, the medium-voltage riser is fixedly arranged on the cover protruding structure, and the medium-voltage bushing is installed in the medium-voltage riser and the oil tank protruding structure; the high-voltage bushing is installed on one side of the cover of the oil tank near the high-voltage side wall, at the end far from the voltage-regulating switch.

[0005] Preferably, a fixing plate is welded on the iron core clamp, and the voltage regulating switch and the tapping lead are supported and fixed through the fixing plate.

[0006] The utility model has the following advantages:

[0007] On the premise of meeting the safe and stable operation of the transformer, by adjusting the position of the voltage regulating switch to shift towards the high-voltage side, making full use of the space between the side column and the high-voltage side tank wall, the overall length of the oil tank no longer needs to consider the distance between the voltage regulating switch and the side column and the tank wall. By adjusting the position of the low-voltage riser to the side wall of the oil tank, and the medium-voltage bushing and the medium-voltage riser are provided with convex structures for installation, the length dimension of the transformer oil tank is reduced, the overall volume of the oil tank is reduced, and the consumption of transformer oil and steel is reduced; the distance between the voltage regulating switch and the tapping head of the main column is shortened, and by adjusting the position of the tapping head, the lead path connecting the voltage regulating switch is simplified, the consumption of wire clamps and lead cables is saved, the error rate is reduced, and the economy and safety of the 500 kV side-column voltage regulating single-phase transformer are significantly improved. Description of the Drawings

[0008] The drawings are used to provide a further understanding of the utility model, and constitute a part of the specification. Together with the embodiments of the utility model, they are used to explain the utility model, and do not constitute a limitation to the utility model. In the drawings:

[0009] Figure 1 is a schematic diagram of the existing conventional switch arrangement structure, 1a is the front view, 1b is the left view, and 1c is the top view;

[0010] Figure 2 is a schematic diagram of the switch arrangement structure of the embodiment of the utility model, 2a is the front view, 2b is the left view, and 2c is the top view;

[0011] Figure 3 is a sectional view of the low-voltage riser of the embodiment of the utility model;

[0012] Among them, 1 - oil tank, 2 - main column, 3 - iron core clamp, 4 - side column, 5 - neutral point bushing, 6 - low-voltage riser, 7 - low-voltage bushing, 8 - voltage regulating switch, 9 - medium-voltage bushing, 10 - high-voltage bushing, 11 - tapping head, 12 - medium-voltage riser, 13 - high-voltage riser. Detailed Embodiment

[0013] Next, the technical solutions of the utility model will be clearly and completely described in conjunction with the drawings. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all of the embodiments.

[0014] As Figure 1As shown, in the prior art, the fuel tank 1 has a cuboid structure. The voltage regulating switch 8 is arranged at the middle position between the low-voltage side and the high-voltage side near the end of the fuel tank 1. Two low-voltage bushings 7 are fixedly installed on the tank cover of the fuel tank 1 through low-voltage riser seats 6. The medium-voltage bushing 9 is fixedly installed on the tank cover of the fuel tank 1 through a medium-voltage riser seat 12. The high-voltage bushing 10 is fixedly installed on the tank cover of the fuel tank 1 through a high-voltage riser seat 13. The voltage regulating switch 8 is located between the low-voltage bushing 7, the medium-voltage bushing 9 and the side column 4. Inside the fuel tank 1, there is a wiring board corresponding to the bushing for connecting the corresponding leads. In order to ensure the insulation distance from the voltage regulating switch 8 to the inner wall of the fuel tank 1 and the distance from the voltage regulating switch 8 to the side column 4, the overall length dimension of the fuel tank 1 is relatively large. At the same time, it is also impossible to clamp and connect the tap leads of the voltage regulating switch 8 by welding a fixing plate on the iron core clamp 3, and the path of the tap head 11 connected to the voltage regulating switch 8 is complex. Some tap heads 11 are located on the upper right side of the voltage regulating switch 8, and some tap heads 11 are located on the lower right side of the voltage regulating switch 8. Only a large number of wire clamps can be used to build a bracket to support the tap leads. In addition, the tap head 11 on the main column 2 is far from the voltage regulating switch 8, and the length of the tap lead is relatively long. The last two points increase the design difficulty.

[0015] As Figure 2 , 3 shown, the embodiment of the present utility model provides a novel switch arrangement structure for a 500 kV side-column voltage regulating single-phase transformer. Inside the fuel tank 1, a side column 4 and a main column 2 are fixedly installed from left to right. The side column 4 and the main column 2 are fixed and supported by an iron core clamp 3. A number of tap heads 11 (a pair of tap heads 11 are shown in the figure) are respectively arranged on the side column 4 and the main column 2. The number of tap heads 11 on the main column 2 and the side column 4 includes but is not limited to two. Figure 1 , 2The tapping outlet 11 in the figure mainly indicates the approximate lead-out positions of several tapping outlets 11. The medium-pressure bushing 9 and the high-pressure bushing 10 are fixedly mounted on the tank cover of the oil tank 1 through the medium-pressure raising seat 12 and the high-pressure raising seat 13 respectively. The medium-pressure bushing 9 and the high-pressure bushing 10 are located at the left and right ends of the high-pressure side close to the high-pressure side wall. The voltage regulating switch 8 is fixedly mounted between the medium-pressure bushing 9 and the side column 4 close to the high-pressure side wall of the oil tank 1. In conjunction with the position adjustment of the voltage regulating switch 8, the tapping outlet 11 on the side column 4 is offset counterclockwise compared to the prior art to be closer to the voltage regulating switch 8. After the position of the voltage regulating switch 8 is adjusted inward, the overall length of the oil tank 1 is reduced accordingly by the space occupied by the original voltage regulating switch 8 in the length direction, and the neutral point bushing 5 is fixedly mounted on the left end of the low-pressure side close to the low-pressure side wall. The low-pressure booster seat 6 is fixedly mounted on the low-pressure side wall of the oil tank 1 through a pipe joint welded on the side wall of the oil tank 1, and a pair of low-pressure bushings 7 are fixedly mounted in the low-pressure booster seat 6, and the low-pressure booster seat 6 is connected to the inside of the oil tank 1. A tank protruding structure is arranged at the upper part of the end of the high-pressure side of the oil tank 1 close to the voltage regulating switch 8, and the tank cover of the oil tank 1 is matched with the tank protruding structure to set the tank cover protruding structure, and the medium-pressure booster seat 12 is fixedly arranged on the tank cover protruding structure, and the medium-pressure bushing 9 is installed in the medium-pressure booster seat 12, and the medium-pressure bushing 9 is located in the tank protruding structure.

[0016] The switch arrangement structure of the novel 500kV side-post voltage-regulating single-phase transformer provided by the utility model arranges the voltage-regulating switch 8 at the end of the high-voltage side, close to the side post 4. After the position of the voltage-regulating switch 8 is adjusted, the length of the oil tank 1 can be greatly reduced, and the amount of transformer oil and steel is correspondingly reduced. After the length of the oil tank 1 is reduced, the low-voltage bushing 7 is placed on the outer side of the oil tank 1 through the low-voltage raising seat 6 on the side wall of the oil tank 1, and the low-voltage raising seat 6 and the low-voltage bushing 7 are moved from the top of the oil tank 1 to the outside of the side wall of the oil tank 1. The voltage regulating switch 8 is placed near the side column 4 on the high-voltage side by means of a flange connection. The voltage regulating switch 8 can be placed by welding a fixing plate on the core clamp 3 for assembling the tapping lead. Because the voltage regulating switch 8 is adjusted to the high-voltage side end inside the oil tank 1, the space between the side column 4 on the high-voltage side and the inner wall of the oil tank 1 is fully utilized, and the length of the oil tank 1 does not need to be enlarged due to the insulation distance between the voltage regulating switch 8 itself and the inner wall of the oil tank 1; the distance between the voltage regulating switch 8 and the tapping outlet 11 on the main column 2 is greatly shortened, and the tapping outlet 11 on the side column 4 can all be adjusted to a position close to the voltage regulating switch 8, and the tapping lead path connected to the voltage regulating switch 8 is simplified, reducing the difficulty of lead design, so that the cost and quality of the transformer are further controlled; at the same time, the voltage regulating switch 8 is adjusted from one end of the core clamp 3 to the side of the core clamp 3, and a fixing plate can be directly welded on the core clamp 3 to support and fix the voltage regulating switch 8 and the tapping lead, so the amount of wire clamps and tapping leads can be greatly reduced. Welding a fixing plate on the core clamp 3 can more firmly and conveniently support and fix the voltage regulating switch 8 and the tapping lead.

[0017] In addition, it should be noted that the diameter of the main column 2 is larger than that of the side column 4. Figure 1 and Figure 2 in [a certain context], the main column 2 should be visible in the left view. However, to avoid confusion in the composition caused by excessive lines, the structure of the main column 2 is not drawn in the left view. At the same time, Figure 1 and Figure 2 in [a certain context], to more conveniently illustrate the technical solution of this embodiment, the top view includes a partial perspective effect. For example, the main column 2, the iron core clamp 3, the side column 4, etc. are all components located inside the fuel tank 1.

[0018] The head cover part of the voltage regulating switch 8 is exposed above the tank cover for voltage adjustment. The part below the head cover part of the voltage regulating switch 8 is inside the fuel tank 1. The upper part of the voltage regulating switch 8 located inside the fuel tank 1 can be supported by welding a fixing plate on the iron core clamp 3, and the bottom end of the voltage regulating switch 8 located inside the fuel tank 1 can also be further fixed through an anti-twisting component.

[0019] In the embodiment of the present utility model, the technical features not described in detail are all prior art or conventional technical means, and will not be elaborated herein.

[0020] Finally, it should be noted that: the above embodiments are only specific implementation manners of the present utility model, used to illustrate the technical solution of the present utility model, rather than limiting it. The protection scope of the present utility model is not limited thereto. Those skilled in the art should understand that: any person skilled in the art within the technical scope disclosed by the present utility model can modify the technical solution recorded in the foregoing embodiments or easily think of changes, or perform equivalent replacements on some of the technical features; and these modifications, changes or replacements do not make the essence of the corresponding technical solution deviate from the spirit and scope of the technical solution of the embodiments of the present utility model, and should all be covered within the protection scope of the present utility model.

Claims

1. A switch arrangement structure of a 500 kV side-pole voltage-regulating single-phase transformer, wherein the 500 kV side-pole voltage-regulating single-phase transformer comprises an oil tank (1), wherein an iron core clamp (3) is arranged inside the oil tank (1), wherein the iron core clamp (3) is fixedly connected to a side pole (4) and a main pole (2), and a plurality of tapping terminals (11) are respectively arranged on the side pole (4) and the main pole (2), wherein the characteristics are as follows: The voltage regulating switch (8) is fixedly mounted at a position close to the side column (4) at the end of the high-pressure side; the low-pressure boosting seat (6) is fixedly mounted on the low-pressure side wall of the oil tank (1) by means of a pipe joint welded to the side wall of the oil tank (1); a pair of low-pressure bushings (7) are fixedly mounted in the low-pressure boosting seat (6); the low-pressure boosting seat (6) is connected to the inside of the oil tank (1); a tank protruding structure is arranged at the upper part of the end of the high-pressure side of the oil tank (1) close to the voltage regulating switch (8); a tank cover protruding structure matching the tank protruding structure is arranged on the tank cover of the oil tank (1); a medium-pressure boosting seat (12) is fixedly mounted on the tank cover protruding structure; a medium-pressure bushing (9) is mounted in the medium-pressure boosting seat (12) and the tank protruding structure; and a high-pressure bushing (10) is mounted on the tank cover of the oil tank (1) on a side close to the high-pressure side wall, and is located at an end away from the voltage regulating switch (8).

2. The switch arrangement structure of the 500kV side-column voltage regulating single-phase transformer according to claim 1 is characterized in that: A fixing plate is welded onto the iron core clamp (3).

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