Transformer on-load tap changer placement tool

Abstract

The utility model belongs to transformer production and manufacturing technical field relates to a kind of transformer on-load tap changer placing tool, tool three-dimensional framework is I-shaped multilayer three-dimensional framework, the height of one side of tool three-dimensional framework long axis direction is higher than the height of other side, operating passageway is set in the middle position of tool three-dimensional framework short axis direction, ladder one is set in the operating passageway of the side of tool three-dimensional framework height low, ladder two is set in the operating passageway of the side of tool three-dimensional framework height high, operating platform one is set between the top of ladder one and the bottom of ladder two, three-dimensional framework bottom layer pedestal is set in the bottom of tool three-dimensional framework of operating passageway two sides, the top of tool three-dimensional framework of operating passageway two sides is set to several U-shaped suspended support steel plate, inner thread hole compatible with the connecting hole of on-load tap changer head cover flange is set on U-shaped suspended support steel plate. The utility model uses short axis direction two sides symmetry formula layout, and central region is operating space, and on-load tap changer is facilitated to check and detect.

Description

Technical Field

[0001] This utility model belongs to the field of transformer manufacturing technology, specifically relating to a fixture for placing an on-load tap changer in a transformer. Background Technology

[0002] During the transformer manufacturing process, the on-load tap changer is stored at the transformer production site. According to technical requirements, the on-load tap changer is connected to the voltage regulating lead and assembled onto the transformer body.

[0003] However, in actual transformer production, on-load tap changers from different manufacturers and of different models are mixed together in a unified area. Retrieving them requires verifying manufacturer and model information, conducting internal and external inspections, and performing electrical tests. The process requires multiple people working together and using ladders and other equipment for working at height, resulting in low production efficiency. The on-load tap changer consists of an upper oil chamber (changing switch) and a lower tap selector, with a total height of approximately 2.55m. Its center of gravity is located in the upper middle part of the tap selector, posing a risk of tipping over during hoisting. Summary of the Invention

[0004] To address the aforementioned technical problems in the existing technology, this utility model provides a tooling for the standardized and categorized placement of on-load tap changers during transformer production, equipped with a reliable fixing structure to eliminate the safety risk of on-load tap changers tipping over. The technical solution adopted by this utility model is as follows: The on-load tap changer placement fixture for the transformer includes a three-dimensional frame, which is a multi-layered I-shaped frame that is narrower at the top and wider at the bottom. One side of the frame is higher than the other along its long axis. An operating passage is located in the middle of the frame's short axis. A first ladder is fixedly installed in the operating passage on the side with the lower frame height, and a second ladder is fixedly installed in the operating passage on the side with the higher frame height. An operating platform is fixedly installed between the top of the first ladder and the bottom of the second ladder. An operating platform is fixedly installed between the outer edge of the top of the second ladder and the outer edge of the frame. Symmetrical bottom bases are fixedly installed at the bottom of the frame on both sides of the operating passage. Several U-shaped suspended support steel plates are symmetrically fixedly installed at the top of the frame on both sides of the operating passage. The openings of the U-shaped suspended support steel plates face outwards, and the diameter of the openings is smaller than the diameter of the on-load tap changer head cover flange. Internal threaded holes that match the connection holes of the on-load tap changer head cover flange are provided on the U-shaped suspended support steel plates.

[0005] Preferably, handrails are symmetrically fixed on the tooling three-dimensional frame above the first staircase, guardrail 1 is symmetrically fixed on the tooling three-dimensional frame above the first operating platform, guardrail 2 is symmetrically fixed on the tooling three-dimensional frame above the second operating platform, and kickboards are symmetrically fixed on both sides of the operating platform 1 and the operating platform 2.

[0006] Preferably, a U-shaped insulating board matching the structure is bonded to the upper surface of the U-shaped suspended support steel plate, and through holes adapted to the internal thread holes of the U-shaped suspended support steel plate are formed on the U-shaped insulating board.

[0007] Preferably, four rigid ring-shaped lifting lugs are fixedly installed at the four corners of the top of the tooling frame.

[0008] Preferably, four rigid horizontal adjustment feet are fixedly installed at the four outer corners of the bottom of the tooling frame along the long axis. The horizontal adjustment feet are L-shaped and are fixedly installed on the horizontal adjustment feet with bolts.

[0009] Preferably, an oil-collecting groove is machined on the upper surface of the bottom base of the three-dimensional frame, and the oil-collecting groove is located directly below the on-load tap changer.

[0010] Preferably, the bottom of the tooling frame is made of rectangular steel pipe.

[0011] The beneficial effects of this utility model are: The present invention relates to a transformer on-load tap changer placement fixture, which adopts a symmetrical layout on both sides along the short axis. The central area is the operator's working space, and the on-load tap changers are distributed in a double-wing pattern around the operator's working area, which facilitates the operator's inspection and testing of the on-load tap changers and improves work efficiency. The fixture has the advantages of simple structure, lightweight and miniaturized design, and realizes the orderly and safe and reliable placement of transformer on-load tap changers. Attached Figure Description

[0012] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the tooling structure according to an embodiment of the present utility model; Figure 2 This is a three-dimensional structural diagram of the tooling for the concealed handrail and guardrail according to an embodiment of the present utility model. Figure 3 This is a front view of the tooling according to an embodiment of the present utility model; Figure 4 This is a top view of the tooling according to an embodiment of the present utility model; Figure 5 This is a left view of the tooling according to an embodiment of the present utility model; Figure 6 This is a three-dimensional structural diagram of a tooling for placing an on-load tap changer according to an embodiment of the present utility model. In the diagram, 1 is the three-dimensional frame of the tooling, 2 is the U-shaped suspended support steel plate, 3 is the handrail, 4 is the guardrail one, 5 is the staircase one, 6 is the horizontal adjustment foot cup mounting part, 7 is the bottom base of the three-dimensional frame, 8 is the on-load tap changer, 9 is the ring-shaped lifting lug, 10 is the staircase two, 11 is the operating platform one, 12 is the operating platform two, and 13 is the guardrail two. Detailed Implementation

[0013] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0014] like Figures 1-6 As shown, the on-load tap changer placement fixture for the transformer includes a three-dimensional frame 1. The three-dimensional frame 1 is an I-shaped multi-layer three-dimensional frame, which is composed of several welded steel pipes. The external design dimensions of the three-dimensional frame 1 are 4450mm*2070mm*2500mm, and the overall design weight is 1268kg.

[0015] The height of the left side of the tooling frame 1 along its long axis is higher than that of the right side. The tooling frame 1 can accommodate more on-load tap changers 8 of different specifications by setting different heights along its long axis. An operating channel is located in the middle of the tooling frame 1 along its short axis, symmetrically dividing the tooling frame 1 into two parts. A first ladder 5 is fixedly installed in the right operating channel by welding. The left side of the first ladder 5 is higher than its right side, and its right edge is flush with the right edge of the tooling frame 1. A second ladder 10 is fixedly installed in the left operating channel by welding. The left side of the second ladder 10 is higher than its right side, and its left edge is a certain distance from the left edge of the tooling frame 1. An operating platform 11 is fixedly installed between the top of ladder 5 and the bottom of ladder 2 10 by welding. Operating platform 11 connects the top of ladder 5 and the bottom of ladder 2 10 and is used to detect the on-load tap changer 8 located at the lower section. An operating platform 2 12 is fixedly installed between the left edge of the top of ladder 2 10 and the left edge of the tooling frame 1 by welding. Operating platform 2 12 is used to detect the on-load tap changer 8 located at the higher section. Both ladders 5 and 2 10 consist of several treads welded to the tooling frame 1. The staggered structure of ladders 5 and 2 10 matches the left-high-right-low top structure of the tooling frame 1. Handrails 3 are symmetrically welded to the tooling frame 1 on both sides above ladder 5. Kickboards are symmetrically fixed to the sides of operating platforms 11 and 2 12 by welding. The tooling frame 1 on both sides above the operating platform 11 is symmetrically welded with guardrail 4, and the tooling frame 1 on both sides above the operating platform 2 is symmetrically welded with guardrail 13. The handrail 3, guardrail 4, guardrail 13 and kickboard are provided to improve the safety of workers when operating at height.

[0016] Several steel pipes are welded together to form the tooling frame 1, specifically including: vertical support steel pipes, horizontal support steel pipes, and diagonal reinforcing steel pipes. This three-dimensional support structure, consisting of horizontal and vertical steel pipes plus diagonal steel pipes, ensures the stability of the tooling frame 1. The bottom of the tooling frame 1 extends a certain length from the middle to both sides. Flat plate-structured bottom bases 7 are symmetrically welded to both sides of the bottom of the tooling frame 1. The short axis of the tooling frame 1 is designed as an I-shaped structure, narrower at the top and wider at the bottom. The addition of the bottom bases 7 further improves the stability of the tooling frame 1 when installed on the ground. The bottom of the tooling frame 1 uses rectangular steel pipes with specifications of 50mm*70mm, further enhancing its stability when installed on the ground.

[0017] Several U-shaped suspended support steel plates 2 are symmetrically welded to the top of the tooling three-dimensional frame 1 on both sides of the operating channel. The openings of the U-shaped suspended support steel plates 2 face outward. The U-shaped suspended support steel plates 2 are preferably made of steel plates with specifications of 730mm*610mm*20mm and have semi-circular slots with a hollowed-out diameter of 580mm. The diameter of the semi-circular slots is slightly smaller than the diameter of the on-load tap changer head cover flange. A U-shaped insulating wooden board with a matching structure is glued and installed on the upper surface of the U-shaped suspended support steel plates 2. The configuration of the U-shaped insulating wooden board can prevent the lower surface of the on-load tap changer head cover flange from being bumped or scratched. The on-load tap changer head cover flange has several connection holes. The U-shaped suspended support steel plate 2 has internal threaded holes that match the connection holes of the on-load tap changer head cover flange. The U-shaped insulating wooden board has through holes that match the internal threaded holes of the U-shaped suspended support steel plate 2. Using an M12 bolt, pass it from top to bottom through the connection holes of the on-load tap changer head cover flange and the through holes on the U-shaped insulating wooden board, and screw it into the internal threaded holes on the U-shaped suspended support steel plate 2. Place the on-load tap changer 8 safely and reliably on the transformer on-load tap changer placement fixture.

[0018] Four rigid ring-shaped lifting lugs 9 are symmetrically fixed at the top four corners of the tooling frame 1 by welding. The ring-shaped lifting lugs 2 must be strong enough to withstand twice the load of the tooling without deformation and four times the load without breaking, and meet the requirements of the site environment for the overall movement of the tooling and production needs.

[0019] Four rigid horizontal adjustment feet 6 are symmetrically fixed to the four corners of the bottom long axis of the tooling frame 1 by welding. The horizontal adjustment feet 6 are L-shaped structures. The horizontal adjustment feet are fixed to the horizontal adjustment feet 6 by bolts. By adjusting the horizontal adjustment feet, the tooling placed on the ground can be kept horizontal.

[0020] Furthermore, several oil-collecting grooves can be machined and set on the upper surface of the bottom base 7 of the three-dimensional skeleton. The oil-collecting grooves are located directly below the on-load tap changer 8 and are used to collect residual lubricating oil in the oil chamber (switch) of the on-load tap changer 8.

[0021] The operation process of the transformer on-load tap changer placement fixture according to this utility model embodiment is as follows: Using lifting machinery, the on-load tap changer placement fixture is lifted and placed in the designated position using the annular lifting lugs 9 on the three-dimensional frame 1. The leveling feet at the mounting brackets 6 are adjusted to ensure the entire on-load tap changer placement fixture is level. The bottom of the on-load tap changer placement fixture contacts the ground, providing the main support. The purpose of installing the leveling feet is to fine-tune the levelness of the placement fixture and prevent it from wobbling due to uneven ground.

[0022] The on-load tap changer 8 is lifted to the U-shaped suspended support steel plate 2. The flange of the on-load tap changer head cover is tightly attached to the U-shaped insulating wooden board on the U-shaped suspended support steel plate 2. Then, M12 bolts are screwed into the internal threaded holes on the U-shaped suspended support steel plate 2 for fastening, so as to prevent the on-load tap changer 8 from shifting or tipping over due to environmental factors or human factors. Figure 6 The transformer on-load tap changer placement fixture has ten U-shaped suspended support steel plates 2 with double wings symmetrically set on the top, which can accommodate ten on-load tap changers 8.

[0023] The on-load tap changer placement fixture provided in this embodiment of the utility model has a symmetrical layout. The central area along the short axis is the core operating space for the operator, which is spacious and open, allowing the operator to flexibly adjust their position and easily complete operations such as information verification and electrical testing. This design arranges the on-load tap changer 8 in a double-wing distribution around the operator's operating area, ensuring smooth and unobstructed operation while making the on-load tap changer 8 easily accessible, effectively improving work efficiency and achieving a highly efficient working mode of "operator in the middle, on-load tap changer 8 suspended on both sides".

[0024] In this embodiment of the utility model, all technical features not described in detail are existing technologies or conventional technical means, and will not be repeated here.

[0025] Finally, it should be noted that the above embodiments are merely specific implementations of this utility model, used to illustrate the technical solution of this utility model, and not to limit it. The protection scope of this utility model is not limited thereto. Those skilled in the art should understand that any person skilled in the art can modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the technical scope disclosed in this utility model; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be covered within the protection scope of this utility model.

Claims

1. A fixture for placing an on-load tap changer of a transformer, comprising a three-dimensional frame (1), characterized in that, The tooling frame (1) is a multi-layered I-shaped frame that is narrower at the top and wider at the bottom. The height of one side of the tooling frame (1) along its long axis is higher than that of the other side. An operating channel is set in the middle of the tooling frame (1) along its short axis. A ladder one (5) is fixedly installed in the operating channel on the side of the tooling frame (1) with a lower height. A ladder two (10) is fixedly installed in the operating channel on the side of the tooling frame (1) with a higher height. An operating platform one (11) is fixedly installed between the top of ladder one (5) and the bottom of ladder two (10). The outer edge of the top of ladder two (10) is fixedly installed. An operating platform 2 (12) is fixedly installed between the outer edge of the tooling three-dimensional frame (1). The bottom base of the three-dimensional frame (7) is symmetrically fixedly installed on the bottom of the tooling three-dimensional frame (1) on both sides of the operating channel. Several U-shaped suspended support steel plates (2) are symmetrically fixedly installed on the top of the tooling three-dimensional frame (1) on both sides of the operating channel. The U-shaped suspended support steel plates (2) have their openings facing outwards. The opening diameter of the U-shaped suspended support steel plates (2) is smaller than the diameter of the on-load tap changer head cover flange. The U-shaped suspended support steel plates (2) have internal threaded holes that are compatible with the connection holes of the on-load tap changer head cover flange.

2. The fixture for placing an on-load tap changer of a transformer according to claim 1, characterized in that, Handrails (3) are symmetrically fixed on the tooling three-dimensional frame (1) on both sides above the first staircase (5). Guardrails (4) are symmetrically fixed on the tooling three-dimensional frame (1) on both sides above the first operating platform (11). Guardrails (13) are symmetrically fixed on the tooling three-dimensional frame (1) on both sides above the second operating platform (12). Kickboards are symmetrically fixed on both sides of the first operating platform (11) and the second operating platform (12).

3. The fixture for placing an on-load tap changer of a transformer according to claim 1, characterized in that, A U-shaped insulating board matching the installation structure is bonded to the upper surface of the U-shaped suspended support steel plate (2). A through hole is opened on the U-shaped insulating board that is compatible with the internal thread hole of the U-shaped suspended support steel plate (2).

4. The fixture for placing an on-load tap changer of a transformer according to claim 1, characterized in that, Four steel ring-shaped lifting lugs (9) are fixedly installed at the top four corners of the tooling three-dimensional frame (1).

5. The fixture for placing an on-load tap changer of a transformer according to claim 1, characterized in that, Four rigid horizontal adjustment cup mounting parts (6) are fixedly installed at the four corners of the bottom long axis direction of the tooling three-dimensional frame (1). The horizontal adjustment cup mounting parts (6) are L-shaped structures, and the horizontal adjustment cups are fixedly installed on the horizontal adjustment cup mounting parts (6) by bolts.

6. The fixture for placing an on-load tap changer of a transformer according to claim 1, characterized in that, An oil receiving groove is machined on the upper surface of the bottom base (7) of the three-dimensional skeleton, and the oil receiving groove is located directly below the on-load tap changer (8).

7. The fixture for placing an on-load tap changer of a transformer according to claim 1, characterized in that, The bottom of the tooling three-dimensional frame (1) is made of rectangular steel pipe.

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