Modularized combined type insulating cushion block for transformer

Abstract

The modular combined type insulation cushion block for the transformer comprises an upper cushion block and a lower cushion block, the upper cushion block and the lower cushion block comprise a pressing plate, a middle groove milling plate, a protruding plate and a positioning plate, and the outer side contours of the pressing plate, the middle groove milling plate, the protruding plate and the positioning plate are flush with one another. A plurality of strip-shaped grooves are formed in the outer side of the middle groove milling plate, plug pin holes are formed in the upper face and the lower face of the middle groove milling plate in an inclined and staggered mode, plug pin holes are formed in the surfaces of one sides of the pressing plate, the protruding plate and the positioning plate in an inclined and staggered mode, and the plug pin holes of the pressing plate, the protruding plate, the positioning plate and the middle groove milling plate are aligned with one another. The upper structure, the middle structure and the bottom structure of the cushion block are modularly designed, and then different combinations are carried out according to different design requirements, so that the use specification of the insulating cushion block is greatly reduced, the universality of the insulating cushion block is powerfully realized, the inventory cost of the cushion block is reduced, and the service life of the insulating cushion block is prolonged. And the market competitive advantages of companies are improved.

Description

Technical Field

[0001] This article belongs to the technical field of transformer pads, and specifically relates to a modular combined insulation pad for transformers. Background Art

[0002] When the coil end of a transformer, especially when the end leads out, the electric field intensity is relatively high. The distance to the yoke is 2 - 3 times the distance between coils. The basic end insulation is the yoke insulation. Usually, in the main insulation structure of dry-type transformers, both the upper yoke insulation and the lower yoke insulation are composed of insulation pads.

[0003] Insulation pads are an important part of the transformer insulation system and account for a large proportion in the entire insulation material. With the serialization of transformers with different voltage levels and different application fields, the specifications of insulation pads are increasing. The diversification of specifications will lead to a large backlog of pads with different specifications in inventory, invisibly increasing the product cost and causing unnecessary waste. How to effectively control the number of insulation pad specifications and maximize the universality of insulation pads

[0004] In the prior art, the patent number is CN103021639B, and the patent name is "Combined Insulation Pad for Dry-Type Transformer", which discloses a combined insulation pad for dry-type transformers. The combined insulation pad is in a cuboid shape. Its feature is that the combined insulation pad includes a top plate and a base, and the top plate and the base are plugged together, or further, at least one core member is added between the top plate and the base. It solves the problem that in the prior art, due to the change of product specifications of insulation pads, a large number of insulation pads with different specifications are required, resulting in an increase in die costs and a long production cycle. It has the advantages of convenient combination, being suitable for the needs of different specifications of products for different sizes of insulation pads, and can effectively reduce die costs and shorten the production cycle.

[0005] However, now with the gradual increase in the types of transformers and the gradual optimization of transformer structures, for the existing combined transformer pads, due to the reasons of the assembly structures on the upper and lower sides, it is necessary to use various forms of assembly surfaces to adapt to various forms of pads. Summary of the Utility Model

[0006] To solve the above problems, this paper proposes a modular combined insulating spacer for transformers. The combined insulating spacer includes an upper spacer and a lower spacer. The upper spacer and the lower spacer include a pressing plate, a middle milling groove plate, a convex plate, and a positioning plate. The outer contours of the pressing plate, the middle milling groove plate, the convex plate, and the positioning plate are all flush with each other. A number of strip-shaped grooves are provided on the outside of the middle milling groove plate. Plug holes are obliquely offset and provided on both the upper and lower surfaces of the middle milling groove plate. Plug holes are obliquely offset and provided on one side surface of the pressing plate, the convex plate, and the positioning plate. The plug holes of the pressing plate, the convex plate, the positioning plate, and the middle milling plate are all aligned with each other. Insulating pins are provided inside the two aligned plug holes. By modularly designing the upper, middle, and bottom structures of the spacer and then making different combinations according to different design requirements, the usage specifications of the insulating spacer are greatly reduced, the versatility of the insulating spacer is strongly realized, the inventory cost of the spacer is reduced, and the market competitiveness of the company is improved.

[0007] The shape of the middle milling groove plate is a rectangular block. A number of strip-shaped grooves are provided horizontally and equidistantly up and down on the outside of the middle milling groove plate. The width of the strip-shaped groove is equal to the spacing between the strip-shaped grooves. The depth of the strip-shaped groove is half of the strip width. The outer sides of the strip-shaped grooves are flush with the upper and lower surfaces of the middle milling groove. The outer contours of the upper and lower surfaces of the middle milling groove plate are both smaller than the overall outer contour of the middle milling groove plate. The shape of the pressing plate is a rectangular plate. A pressing groove is provided in the center of one side surface of the pressing plate. Plug holes are provided on the other side surface of the pressing plate. The shape of the convex plate is a rectangular plate. A convex platform is provided longitudinally on one side surface of the convex plate. Plug holes are provided on the other side surface of the convex plate. The shape of the positioning plate is a rectangular plate. A positioning inner corner groove is provided at the end of one side surface of the positioning plate. A positioning waist hole is provided in the center of one side surface of the positioning plate. Plug holes are provided on the other side surface of the convex plate. The shape of the insulating pin is a cylindrical pin column. The diameter of the insulating pin is the same as the diameter of the plug hole. The plug hole is a straight-through blind hole. The depth of the plug hole is half of the height of the insulating pin. The design idea is ingenious and flexible. Through the combination of different modules, 80% of the specifications of the insulating spacers for transformers with different voltage levels and different insulation systems are included, greatly reducing the inventory quantity and inventory cost of the spacers and enhancing the competitive advantage of the enterprise.

[0008] Beneficial effects:

[0009] By modularly designing the upper, middle, and bottom structures of the spacer and then making different combinations according to different design requirements, the usage specifications of the insulating spacer are greatly reduced, the versatility of the insulating spacer is strongly realized, the inventory cost of the spacer is reduced, and the market competitiveness of the company is improved.

[0010] The design concept is ingenious and flexible. Through the combination of different modules, 80% of the specifications of the insulating pads for transformers with different voltage levels and different insulation systems are included, greatly reducing the inventory quantity and inventory cost of the pads and enhancing the competitive advantage of the enterprise. Brief Description of the Drawings

[0011] Figure 1 It is a schematic diagram of the upper insulating pad of a modular combined insulating pad for a transformer;

[0012] Figure 2 It is a schematic diagram of the lower insulating pad of a modular combined insulating pad for a transformer;

[0013] Figure 3 It is a schematic diagram of the multi-layer lower insulating pad of a modular combined insulating pad for a transformer;

[0014] Figure 4 It is a schematic diagram of the multi-layer upper insulating pad of a modular combined insulating pad for a transformer;

[0015] Figure 5 It is a schematic diagram of the lower insulating pad without a Chinese-style of a modular combined insulating pad for a transformer;

[0016] Figure 6 It is a schematic diagram of the upper insulating pad without a Chinese-style of a modular combined insulating pad for a transformer;

[0017] Figure 7 It is a front view of the convex plate of a modular combined insulating pad for a transformer;

[0018] Figure 8 It is a top view of the convex plate of a modular combined insulating pad for a transformer;

[0019] Figure 9 It is a front view of the middle milling groove plate of a modular combined insulating pad for a transformer;

[0020] Figure 10 It is a top view of the middle milling groove plate of a modular combined insulating pad for a transformer;

[0021] Figure 11 It is a front view of the positioning plate of a modular combined insulating pad for a transformer;

[0022] Figure 12 It is a top view of the positioning plate of a modular combined insulating pad for a transformer;

[0023] Figure 13 It is a front view of the pressing plate of a modular combined insulating pad for a transformer;

[0024] Figure 14It is a top view of the pressure plate of a modular combined insulating spacer for a transformer;

[0025] In the figure: 1. Pressure plate, 2. Middle milling groove plate, 3. Convex plate, 4. Positioning plate. Specific implementation mode

[0026] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in combination with embodiments and drawings. The embodiments are only used to explain the present invention and do not constitute a limitation to the protection scope of the present invention.

[0027] Pressure plate 1, middle milling groove plate 2, convex plate 3, positioning plate 4.

[0028] As Figure 7 、 8 、9, 10, 11, 12, 13, 14 shown;

[0029] A modular combined insulating spacer for a transformer. The combined insulating spacer includes an upper spacer and a lower spacer. The upper spacer and the lower spacer include a pressure plate 1, a middle milling groove plate 2, a convex plate 3 and a positioning plate 4. The outer contours of the pressure plate 1, the middle milling groove plate 2, the convex plate 3 and the positioning plate 4 are all flush with each other. A number of strip grooves are provided on the outside of the middle milling groove plate 2. Plug holes are provided on the upper and lower surfaces of the middle milling groove plate 2 in an obliquely offset manner. Plug holes are provided on one side surface of the pressure plate 1, the convex plate 3 and the positioning plate 4 in an obliquely offset manner. The plug holes of the pressure plate 1, the convex plate 3, the positioning plate 4 and the middle milling plate are all aligned with each other. Insulating pins are provided inside the two aligned plug holes. The shape of the middle milling groove plate 2 is a rectangular block. A number of strip grooves are provided horizontally and annularly and equidistantly up and down on the outside of the middle milling groove plate 2. The width of the strip grooves is equal to the spacing between the strip grooves. The depth of the strip grooves is half of the strip width. The outer sides of the strip grooves are flush with the upper and lower side surfaces of the middle milling groove. The outer contours of the upper and lower side surfaces of the middle milling groove plate 2 are smaller than the overall outer contour of the middle milling groove plate 2. The shape of the pressure plate 1 is a rectangular plate. A pressure groove is provided in the center of one side surface of the pressure plate 1. Plug holes are provided on the other side surface of the pressure plate 1. The shape of the convex plate 3 is a rectangular plate. A convex platform is provided longitudinally on one side surface of the convex plate 3. Plug holes are provided on the other side surface of the convex plate 3. The shape of the positioning plate 4 is a rectangular plate. A positioning inner corner groove is provided at the end of one side surface of the positioning plate 4. A positioning waist hole is provided in the center of one side surface of the positioning plate 4. Plug holes are provided on the other side surface of the convex plate 3. The shape of the insulating pin is a cylindrical pin column. The diameter of the insulating pin is the same as the diameter of the plug hole. The plug hole is a straight-through blind hole. The depth of the plug hole is half of the height of the insulating pin.

[0030] Implementation example;

[0031] According to different customer requirements and different design schemes, the upper, middle and bottom structural modules of the spacer are combined accordingly.

[0032] For the insulating spacer of a transformer with a low voltage level, combining the pressing plate 1, convex plate 3 and positioning plate 4 in the upper structure and bottom structure of the spacer can meet the requirements of the overall design scheme (as shown in Figure 5 , 6 );

[0033] For the insulating spacer of a transformer with a voltage level greater than 10 kV, combining the pressing plate 1, middle milled groove plate 2, convex plate 3 and positioning plate 4 in the upper structure + middle milled groove structure + middle milled groove structure + bottom structure (a combination of several modules) of the spacer can meet the requirements of the overall design scheme (as shown in Figure 3 , 4 ).

[0034] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A modular combined insulating spacer for a transformer, the combined insulating spacer comprising an upper spacer and a lower spacer, the upper spacer and the lower spacer comprising a pressing plate, a middle milling groove plate, a convex plate and a positioning plate, characterized in that: The outer contours of the pressing plate, the middle milling plate, the convex plate and the positioning plate are all flush with each other. The outer side of the middle milling plate is provided with a plurality of strip grooves. The upper and lower surfaces of the middle milling plate are both obliquely staggered with latch holes. One side surface of the pressing plate, the convex plate and the positioning plate are all obliquely staggered with latch holes. The latch holes of the pressing plate, the convex plate, the positioning plate and the middle milling plate are all aligned with each other, and insulating pins are provided inside the two aligned latch holes.

2. The modular combined insulating spacer for transformer according to claim 1, characterized in that: The shape of the middle milling groove plate is a rectangular block, and a plurality of strip grooves are equidistantly arranged in the upper and lower horizontal ring on the outer side of the middle milling groove plate. The width of the strip grooves is equal to the spacing between the strip grooves, the depth of the strip grooves is half of the strip width, and the outer edges of the strip grooves are flush with the upper and lower surfaces of the middle milling groove. The outer contours of the upper and lower surfaces of the middle milling groove plate are smaller than the overall outer contour of the middle milling groove plate.

3. The modular combined insulating spacer for transformer according to claim 1, characterized in that: The pressing plate is in the shape of a rectangular plate, one side surface of the pressing plate is provided with a pressing groove in the center, and the other side surface of the pressing plate is provided with a latch hole.

4. The modular combined insulating spacer for transformer according to claim 1, characterized in that: The shape of the convex plate is a rectangular plate, a boss is longitudinally arranged on one side surface of the convex plate, and a latch hole is arranged on the other side surface of the convex plate.

5. The modular combined insulating spacer for transformer according to claim 1, characterized in that: The positioning plate is in the shape of a rectangular plate, a positioning inner angle groove is arranged at the end of one side surface of the positioning plate, a positioning waist hole is arranged at the center of one side surface of the positioning plate, and a pin hole is arranged on the other side surface of the convex plate.

6. The modular combined insulating spacer for transformer according to claim 1, characterized in that: The insulating pin is in the shape of a cylindrical pin, the diameter of the insulating pin is the same as the diameter of the plug hole, the plug hole is a straight-through blind hole, and the depth of the plug hole is half the height of the insulating pin.

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