Lower yoke cushion block and stay positioning structure for closed wound core transformer

Abstract

The utility model discloses a lower iron yoke cushion block and stay positioning structure for a closed wound core transformer, which comprises a circular cushion block body, a through hole is arranged on the circle center of the cushion block body, a plurality of notches are arranged on the edge of the through hole, the notches are used for inserting positioning stays, the positioning stays are used for positioning and guiding bracing stays, and the positioning stays are used for positioning and guiding the bracing stays. According to the utility model, the problems that the supporting strips cannot be vertically driven into an iron core protection paper tube to an inner coil paper tube and reliable support cannot be provided due to high coil height are solved, and the supporting strips are inserted and positioned by arranging the notches on the cushion block body and utilizing the notches to connect and position the supporting strips, so that the reliability of the cushion block is improved, and the service life of the cushion block is prolonged. Meanwhile, the two sides of the tight supporting strip are positioned through the positioning supporting strips, so that the tight supporting strip can be vertically driven into a preset position, the tight supporting strip can be located from the iron core protection paper tube to the inner coil paper tube, and the supporting force on the coil and the paper tube is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of yoke pads, specifically to a lower yoke pad and support bar positioning structure for a closed-core transformer. Background Technology

[0002] For closed-core transformers, the manufacturing process involves first installing a winding steel mold on the outer surface of the core column, then assembling the inner coil paper tube and support bars on the steel mold to wind the coil. After the coil winding is completed and the steel mold is removed, there will inevitably be a relatively large gap between the core column surface, i.e., between the core protective paper tube and the inner coil paper tube. It is impossible to fill this gap with a full loop of support bar chain.

[0003] Therefore, during the assembly of the coil body, partial support chains can be inserted in the positions where they are covered by the yoke on the core, while support bars need to be driven into the positions where they are not covered by the yoke on the core, so that the paper tube inside the coil is reliably tightened.

[0004] Since the coil height is usually high, it is difficult to drive the support bar into the predetermined position completely vertically when driving it in from the top of the coil. Therefore, in order to solve this problem, a lower yoke pad and support bar positioning structure specifically designed for closed-core transformers has been developed. Utility Model Content

[0005] The purpose of this utility model is to provide a lower yoke pad and support bar positioning structure for a closed-core transformer. By opening a slot on the pad body, a positioning support bar is inserted into the slot. At the same time, the positioning support bar positions both sides of the tensioning support bar, so that the tensioning support bar can be driven vertically into the predetermined position. The tensioning support bar can be located between the core protective paper tube and the inner paper tube of the coil, providing support for the coil and the inner paper tube of the coil.

[0006] This utility model provides the following technical solution: a lower yoke pad for a closed-core transformer, comprising a circular pad body, a through hole at the center of the pad body, and multiple slots on the edge of the through hole, the slots being used to insert positioning support bars, the positioning support bars being used to position the tensioning support bars, and the tensioning support bars being located between the slots.

[0007] In order to position the tensioning bars so that each tensioning bar has a positioning bar on both sides, the number of slots is twice the number of tensioning bars.

[0008] To ensure smooth insertion of the tensioning support bars, the adjacent slots are spaced a certain distance apart, so that after the positioning support bar is inserted into the slot, the tensioning support bar can be smoothly and vertically driven between the two positioning support bars.

[0009] This utility model also provides the following technical solution: a support bar positioning structure, including the lower yoke pad block for a closed-core transformer as described above. A through hole is opened on the center of the pad block body, and multiple slots are opened on the edge of the through hole. Positioning support bars are inserted into the slots, and tensioning support bars are inserted between the positioning support bars. Iron core protective paper tubes and coil inner paper tubes are respectively provided on the inner and outer sides of the tensioning support bars.

[0010] The positioning support bar is convenient to remove from between the iron core protective paper tube and the inner paper tube of the coil and then repeatedly insert it. The height of the positioning support bar is higher than the height of the inner paper tube of the coil.

[0011] To prevent the positioning support bar from shifting when it is driven in and tightened, the positioning support bar includes an upper support part and a lower positioning part. The positioning part is rectangular in shape, and the top surface of the support part is higher than the height of the paper tube inside the coil, which facilitates the adjustment of the verticality of the positioning support bar.

[0012] The number of tensioning bars is determined by the coverage area of ​​the yoke on the iron core. The lower positioning part of the positioning bar is inserted into the slot, and the tensioning bar is inserted between two positioning bars.

[0013] Compared with the prior art, the beneficial effects achieved by this utility model are as follows: by opening a slot on the pad block body, the positioning support strip is inserted into the slot, and the positioning support strip is used to position the two sides of the tensioning support strip, so that the tensioning support strip can be driven vertically into the predetermined position, and the tensioning support strip is driven into the gap between the iron core protective paper tube and the inner paper tube of the coil, providing support for the coil and the inner paper tube of the coil. Attached Figure Description

[0014] 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:

[0015] Figure 1 This is a schematic diagram of the structure of the lower yoke pad of this utility model;

[0016] Figure 2 This is a top view of the installation position of the iron core and the lower yoke pad of this utility model;

[0017] Figure 3 yes Figure 2 A magnified view of a portion of region A in the middle;

[0018] Figure 4 This is a schematic diagram of the support bar positioning structure of this utility model;

[0019] Figure 5 This is a structural schematic diagram of the positioning support strip and the tensioning support strip of this utility model;

[0020] Figure 6 This is a structural diagram of the positioning support bar of this utility model;

[0021] In the diagram: 1. Pad body; 2. Through hole; 3. Groove; 4. Positioning support bar; 41. Support part; 42. Positioning part; 7. Tightening support bar; 8. Iron core protective paper tube; 9. Coil inner paper tube. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0023] Please see Figure 1 This utility model provides a technical solution: a lower yoke pad for a closed-core transformer, comprising a circular pad body 1, with a through hole 2 at the center of the pad body 1. In this embodiment, fourteen slots 3 are formed on the edge of the through hole 2. The slots 3 are used to insert positioning support bars 4. Two positioning support bars 4 are inserted into the slots 3. A tightening support bar 7 is inserted between the positioning support bars 4. The tightening support bar 7 is used to tighten the paper tube 9 inside the coil. The tightening support bar 7 is driven between the two positioning support bars 4. Located between adjacent slots 3, the slots 3 ensure the verticality of the positioning support 4. The positioning support 4 is further used to position the tensioning support 7, ensuring the verticality of the tensioning support 7. At the same time, the tensioning support 7 is located between the iron core protective paper tube 8 and the inner paper tube 9 of the coil, ensuring the support force of the tensioning support 7 on the inner paper tube 9 of the coil and on the iron core protective paper tube 8. Moreover, the positioning support 4 is a temporary support. After the tensioning support 7 is inserted, the positioning support 4 can be removed to position the next tensioning support 7.

[0024] The center distance between adjacent slots 3 is 60mm, so that the fourteen slots 3 are distributed at a certain interval, ensuring the distribution position of the slots 3 and making the slots 3 distributed on the outer surface of the coiled iron core, avoiding the slots 3 being blocked by the iron core, and at the same time, allowing the tensioning support bar 7 to be smoothly inserted between the positioning support bar 4.

[0025] like Figures 2 to 5This utility model also provides a technical solution: a support bar positioning structure, including the aforementioned lower yoke pad for a closed-core transformer, comprising a pad body 1, a through hole 2 at the center of the pad body 1, and fourteen slots 3 on the edge of the through hole 2, each slot 3 being 20mm in length, width, and depth. Two positioning support bars 4 are inserted into the slots 3, ensuring the verticality of the positioning support bars 4. A tensioning support bar 7 is inserted between the positioning support bars 4, enabling the positioning support bars 4 to position the tensioning support bars 7 and ensure their verticality. The inner and outer sides of the tensioning support bars 7 are respectively... The device is equipped with a core protective paper tube 8 and a coil inner paper tube 9. The coil is wound on the coil inner paper tube 9. The thickness of the tensioning support bar 7 is equal to the distance between the core protective paper tube 8 and the coil inner paper tube 9. The tensioning support bar 7 supports the coil inner paper tube 9, ensuring the support force for the coil inner paper tube 9 and the coil. Because the coil and the coil inner paper tube 9 are high, it is difficult to ensure the verticality of the existing support bar when it is driven in. Therefore, the positioning support bar 4 positions the two sides of the tensioning support bar 7, improving the verticality of the tensioning support bar 7, so that the tensioning support bar 7 can be driven vertically into the predetermined position.

[0026] There are seven tensioning bars 7. Two positioning bars 4 are first inserted into two slots 3, and then the tensioning bars 7 are inserted between the two positioning bars 4, ensuring the verticality of both sides of the tensioning bars 7, so that the tensioning bars 7 are distributed between two adjacent slots 3.

[0027] like Figure 4 and 5 As shown, during assembly, the height of the tensioning support 7 is 10mm lower than the height of the inner paper tube 9 of the coil, and the height of the positioning support 4 is higher than the height of the inner paper tube 9 of the coil. The upper end of the positioning support 4 extends out of the inner paper tube 9 of the coil. The assembly worker adjusts and fixes it vertically. The tensioning support 7 is placed between the positioning support 4 and slowly hammered in so that the tensioning support 7 is hammered vertically into the predetermined position. Because the inner paper tube 9 of the coil is high, it is difficult to ensure the verticality of the tensioning support 7 when hammering it in. Therefore, the positioning support 4 is used to position the tensioning support 7. After the tensioning support 7 is installed in place, the positioning support 4 can be taken out and hammered into another slot 3 to position and install the next tensioning support 7.

[0028] like Figure 6 As shown, the positioning support bar 4 includes an upper support part 41 and a lower positioning part 42. The positioning part 42 is a rectangle with a width of 16mm and a height of 30mm. The positioning part 42 is inserted into the slot 3. The width of the support part 41 is 24mm, and the height is determined by the height of the paper tube 9 inside the coil. The thickness of the positioning support bar 4 is determined according to the gap between the iron core protective paper tube 8 on the surface of the iron core column and the paper tube 9 inside the inner coil. The thickness is smaller than the gap, so that the positioning support bar 4 can be easily inserted into the gap.

[0029] The number of tensioning bars 7 is determined by the range of the iron yoke on the iron core. The blocked part is inserted into the support bar chain, and the unblocked part is driven into the tensioning bars 7. The lower positioning part 42 of the positioning bar 4 is inserted into the slot 3. The tensioning bars 7 are inserted between the two positioning bars 4. By using the cooperation of the support bar chain and the tensioning bars 7, the paper tube 9 inside the coil is reliably tensioned.

[0030] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A lower yoke pad for a closed-core transformer, comprising a circular pad body, characterized in that: The pad block body has a through hole at its center and multiple slots on the edge of the through hole. The slots are used to insert positioning support bars, which are used to position the tensioning support bars. The tensioning support bars are located between two positioning support bars.

2. The lower yoke pad for a closed-core transformer according to claim 1, characterized in that: The number of slots is twice the number of the support bars.

3. A support bar positioning structure, characterized in that: The lower yoke pad for a closed-core transformer as described in any one of claims 1 to 2 is provided with a through hole at the center of the pad body, and a plurality of slots are provided on the edge of the through hole. Temporary positioning support bars are inserted into the slots, and tensioning support bars are inserted between the positioning support bars. Core protective paper tubes and coil inner paper tubes are respectively provided on the inner and outer sides of the tensioning support bars.

4. The support bar positioning structure according to claim 3, characterized in that: The positioning support bar includes an upper support part and a lower positioning part. The positioning part is rectangular in shape, and the top surface of the support part is higher than the height of the paper tube inside the coil.

5. The support bar positioning structure according to claim 3, characterized in that: The number of tensioning bars is determined by the yoke's coverage area on the iron core. The lower positioning part of the positioning bar is inserted into the slot, and the tensioning bar is inserted between two positioning bars.

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