Coil transposition cushion block structure of transformer

Abstract

The coil transposition cushion block structure comprises an inclined plane cushion block and supporting cushion blocks, the two sides of the inclined plane cushion block are fixedly connected with the supporting cushion blocks, the lower end face of the inclined plane cushion block is of a first groove structure, the upper end face of the inclined plane cushion block is of an inclined plane structure, and the upper end face and the lower end face of each supporting cushion block are of a second groove structure. The first groove structure and the second groove structure are the same in structure, and the first groove structure on the lower end face of the inclined face cushion block is aligned with the second groove structure on the lower end face of the supporting cushion block. The wedge-shaped transposition cushion block structure has the advantages that the wedge-shaped transposition cushion block structure can be applied to an energy-saving transformer and a continuous coil wound by a transposed conductor, and compared with a traditional wedge-shaped transposition cushion block structure, the wedge-shaped transposition cushion block structure is more convenient to install, high in structural strength, simple in machining process and high in production efficiency.

Description

Technical Field

[0001] The utility model belongs to an insulating component of a transformer, in particular to a coil transposition cushion block structure suitable for an oil-immersed energy-saving transformer. Background Art

[0002] In large oil-immersed transformers, there is a transposition between two adjacent windings. When there is no filling at the transposition, the amplitude of the winding will be loose and not tight, which will reduce the short-circuit resistance of the winding and leave hidden dangers for the safe operation of the transformer. At the same time, the vacancies caused by the transposition will also affect the aesthetics of the winding.

[0003] At present, wedge-shaped pads are used at the transposition of the coil transposition conductor of the oil-immersed transformer. Figure 1 , Figure 1 At the transposition position 5 between the center line segments No. 2 and 3, a wedge-shaped transposition pad 4 is placed on the adjacent No. 2 and No. 3 struts and No. 4 and No. 5 struts on both sides thereof.

[0004] See Figure 2 , Figure 3 This type of structure has a transposition pad 4, the radial size of which transitions from 2 mm to the radial width A of the transposition conductor gauge. The wedge-shaped pad is irregular in shape and is made of rectangular laminated cardboard. It requires a professional CNC insulation processing center to produce it. The processing technology is complicated, there is a lot of processing waste, the processing cost is high, and the production efficiency is low. Since the coil transposition operation is all manual transposition, the transposition cannot be completely consistent, the wedge-shaped pad cannot match each transposition position, and it takes a lot of time to manually prepare it, which cannot meet the actual production requirements. The wedge-shaped pad uses a large amount of laminated cardboard to make it, which produces a lot of waste and high material costs. The wedge-shaped pad and the wire cakes of segment numbers 2 and 3 and the support bars 2, 3, 4, and 5 cannot form an overall binding, cannot be limited, and have poor stability. Summary of the invention

[0005] The utility model aims to provide a coil transposition pad structure of a transformer, which has a simple and reasonable structure, is easy to install, has high structural strength and good stability.

[0006] To achieve the above purpose, the utility model is implemented through the following technical solutions:

[0007] A coil transposition pad structure for a transformer comprises an inclined pad and a supporting pad. The inclined pad is fixedly connected to supporting pads on both sides. The lower end surface of the inclined pad is a groove structure 1, and the upper end surface is a inclined structure. The upper and lower end surfaces of the supporting pad are both groove structure 2; the structure of groove structure 1 is the same as that of groove structure 2, and the groove structure 1 on the lower end surface of the inclined pad is aligned with the groove structure 2 on the lower end surface of the supporting pad.

[0008] The coil transposition pad structure is an integrated piece made of insulating paper.

[0009] The angle between the inclined surface structure and the horizontal plane is 10° to 45°.

[0010] The groove structure 1 is arranged at the middle position of the lower end surface of the inclined pad.

[0011] The second groove structure is arranged at the middle position between the upper and lower end surfaces of the supporting pad.

[0012] The inclined pads and supporting pads are both made of more than two layers of laminated paperboard.

[0013] The left and right end surfaces of the inclined pad are parallel to each other and perpendicular to the bottom of the groove structure 1.

[0014] The left and right end surfaces of the supporting pad are parallel to each other and perpendicular to the bottom of the second groove structure.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The coil transposition pad structure of the transformer can be applied to energy-saving transformers and is suitable for continuous coils wound by transposition conductors. Compared with the traditional wedge-shaped transposition pad structure, it is more convenient to install, has high structural strength, simple processing technology, and high production efficiency. During the production process of the coil transposition pad structure of the transformer, waste is only generated at the groove structure, saving material costs. The deviation of transposition does not affect the installation and use of the coil transposition pad structure, and no manual intervention is required. It only needs to be aligned with the support pad, saving a lot of man-hours. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the placement of the original coil transposition pad.

[0018] Figure 2 This is the front view of the original coil transposition pad.

[0019] Figure 3 It is a top view of the original coil transposition pad.

[0020] Figure 4 This is a schematic diagram of the placement of the transformer coil transposition pad structure Figure 1 .

[0021] Figure 5 It is the front view of the coil transposition pad structure of the transformer.

[0022] Figure 6 It is a side view of the coil transposition pad structure of the transformer.

[0023] Figure 7 It is a top view of the coil transposition pad structure of the transformer.

[0024] Figure 8 This is the front view of the support pad.

[0025] Fig. 9 is a side view of the support pad.

[0026] Fig.10 This is the front view of the inclined pad.

[0027] Fig.11 It is a side view of the inclined pad.

[0028] Fig.12 This is a schematic diagram of the placement of the transformer coil transposition pad structure Figure 2 .

[0029] Fig.13 It is a schematic diagram of the position of the coil transposition pad structure of the transformer placed on the inner support bar.

[0030] Fig.14 It is a schematic diagram of the position of the coil transposition pad structure of the transformer placed on the external support bar.

[0031] In the figure: 1-strut 2-coil cake 3-strut pad 4-transposition pad 5-transposition position 6-inclined pad 7-support pad 8-paper tube 9-inner strut 10-outer strut 11-coil transposition pad structure placed on the inner strut 12-coil transposition pad structure placed on the outer strut 61-groove structure two 71-groove structure one. DETAILED DESCRIPTION

[0032] The present invention is described in detail below in conjunction with the accompanying drawings of the specification, but it should be noted that the implementation of the present invention is not limited to the following embodiments.

[0033] See Figure 4-Figure 11 A coil transposition pad structure of a transformer includes an inclined pad 6 and a supporting pad 7. The supporting pads 7 are fixedly connected on both sides of the inclined pad 6. The lower end surface of the inclined pad 6 is a groove structure 1 71, and the upper end surface is an inclined structure. The upper and lower end surfaces of the supporting pad 7 are both groove structures 2 61; the structures of the groove structure 1 71 and the groove structure 2 61 are the same, and the groove structure 1 71 on the lower end surface of the inclined pad 6 is aligned with the groove structure 2 61 on the lower end surface of the supporting pad 7. The groove structure 1 71 is arranged in the middle position of the lower end surface of the inclined pad 6; the groove structure 2 61 is arranged in the middle position of the upper and lower end surfaces of the supporting pad 7. The left and right end surfaces of the inclined pad 6 are parallel to each other and perpendicular to the bottom of the groove structure 1 71. The left and right end surfaces of the supporting pad 7 are parallel to each other and perpendicular to the bottom of the groove structure 2 61.

[0034] The coil transposition pad structure of the transformer is an integrated insulating paper piece. The two sides of the inclined pad 6 are fixed to the supporting pad 7 by bonding, and the inclined pad 6 and the supporting pad 7 are both made of more than two layers of laminated paperboard.

[0035] See Fig.10 The angle between the inclined surface structure of the inclined surface pad 6 and the horizontal plane is 10° to 45°.

[0036] Example

[0037] See Fig.12 The transposition position 5 between line segments 2 and 3 has a coil transposition pad structure placed on both sides of the No. 3 support bar 1 and the No. 4 support bar 1 respectively.

[0038] The coil transposition pad structure is composed of a bevel pad 6 and two support pads 7. The two sides of the bevel pad 6 are glued together with the support pad 7. The lower end surface of the bevel pad 6 is provided with a 20×5mm groove structure 1 71, and the upper end surface is a bevel structure, which is consistent with the transition section of the coil cake. The upper and lower end surfaces of the support pad 7 are both groove structures 2 61, and the size of the groove structure 2 61 is also 20×5mm; the groove structure 1 71 and the groove structure 2 61 are used to limit and fix with the support bar 1 (inner support bar 9, outer support bar 10), without displacement, and good stability.

[0039] See Figure 4-Figure 7 The width B of the coil transposition pad structure is the same as the width of the support pad 3. The support pad 3 is only placed at the transposition position, which reduces the material consumption and saves costs. The deviation of the transposition does not affect the installation and use of the coil transposition pad structure. No manual intervention is required. It only needs to be aligned with the support pad 3, saving a lot of man-hours. The coil transposition pad structure has a regular shape and can be processed and manufactured with simple machinery. The processing technology is simple and the production efficiency is high. Only the groove structure produces waste, and the material utilization rate is high.

[0040] The placement positions of the coil transposition pad structure 12 and the bottom coil transposition pad structure 11 are shown in FIG. Figure 12-14 During installation, the inclined side is close to the coil, and the inner and outer support bars 9 and 10 are installed on the groove structure side, forming a frame structure with the paper tube 8, the inner support bar 9, the upper and lower support pads, the coil, and the outer support bar 10. Each section forms a whole coil with good stability.

[0041] The coil transposition pad structure adopts an integrated structure, and the support pad 7 and the inclined pad 6 are positioned at the same time, which improves the stability and improves the problem of position deviation when the transposition pad is placed.

Claims

1. A coil transposition pad structure of a transformer, characterized in that: It includes an inclined pad and a supporting pad. The supporting pads are fixedly connected on both sides of the inclined pad. The lower end face of the inclined pad is a groove structure 1, and the upper end face is a inclined structure. The upper and lower end faces of the supporting pad are both groove structure 2. The structure of groove structure 1 is the same as that of groove structure 2. The groove structure 1 on the lower end face of the inclined pad is aligned with the groove structure 2 on the lower end face of the supporting pad.

2. The coil transposition pad structure of a transformer according to claim 1, characterized in that: The coil transposition pad structure is an integrated piece made of insulating paper.

3. The coil transposition pad structure of a transformer according to claim 1, characterized in that: The angle between the inclined surface structure and the horizontal plane is 10° to 45°.

4. The coil transposition pad structure of a transformer according to claim 1, characterized in that: The groove structure 1 is arranged at the middle position of the lower end surface of the inclined pad.

5. The coil transposition pad structure of a transformer according to claim 1, characterized in that: The second groove structure is arranged at the middle position between the upper and lower end surfaces of the supporting pad.

6. The coil transposition pad structure of a transformer according to claim 1, characterized in that: The inclined pads and supporting pads are both made of more than two layers of laminated paperboard.

7. The coil transposition pad structure of a transformer according to claim 1, characterized in that: The left and right end surfaces of the inclined pad are parallel to each other and perpendicular to the bottom of the groove structure 1.

8. The coil transposition pad structure of a transformer according to claim 1, characterized in that: The left and right end surfaces of the supporting pad are parallel to each other and perpendicular to the bottom of the second groove structure.

Images