Transformer insulation cushion block
The manufacturing of transformer insulated pads through glass wire pultrusion technology impregnated with epoxy resin solves the problem of possible bubbles in existing pads, achieves superior electrical performance and improves compressive strength, and reduces manufacturing costs.
Patent Information
- Application Number
- CN202420974517.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-08
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-05-08
AI Technical Summary
The existing transformer insulating pads may have bubbles when the casting process is incorrect, resulting in local discharge of high-voltage products, and there are many processing steps and high costs.
Insulating pads are made using glass wire pultrusion technology of impregnated epoxy resin. The bubbles and excess epoxy resin are discharged through the pultrusion process to form a hollow rectangular body structure, and semicircular edges are provided on the sides to increase compressive strength and creepage distance.
It realizes that there is no bubble inside the insulating pad, has excellent electrical performance, increases compressive strength and creepage distance, and reduces manufacturing costs.
Smart Images
Figure CN222600716U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an insulating spacer block for a transformer. Background Art
[0002] The high-voltage coil of a dry-type transformer is at a high potential, while the iron core is at zero potential. The coil needs to be pressed against the iron core from top to bottom, so insulating pads need to be set above and below the coil. Existing insulating pads are formed by vacuum casting of epoxy resin. If the casting process is not handled properly, bubbles may exist in the pads, and for products with higher voltage levels, partial discharge may occur. A large number of pads are also used in high-voltage oil-immersed transformers. Most of these pads are made of laminated paperboard or laminated wood. After bonding and pressing, they are immersed in oil. The time for oil immersion is long and there are many processing steps, so the cost is correspondingly high. Summary of the invention
[0003] The utility model provides a transformer insulating pad in order to solve the problems existing in the prior art.
[0004] The technical solutions adopted in this utility model are:
[0005] A transformer insulating spacer comprises a body formed by pultrusion of glass fibers soaked in epoxy resin. The body is a hollow rectangular structure. One or more raised edges are arranged on the inner and outer wall surfaces of two mutually parallel sides of the body.
[0006] Furthermore, the number of edges on the two sides is equal, and the number of edges on the inner and outer walls of each side is equal.
[0007] Furthermore, the cross section of the edge is semicircular.
[0008] The utility model has the following beneficial effects:
[0009] The utility model pad is formed by pultrusion of glass fibers impregnated with epoxy resin, has no bubbles inside, has better electrical performance, and is provided with one or more edges, which can increase the creepage distance and the compressive strength. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 This is a structural diagram of the utility model.
[0011] Figure 2 This is a structural diagram of the utility model. DETAILED DESCRIPTION
[0012] The utility model is further described below in conjunction with the accompanying drawings.
[0013] The utility model discloses an insulating spacer for a transformer, comprising a body 1 formed by pultrusion of glass fibers soaked in epoxy resin. The body 1 is a hollow rectangular structure. The hollow structure can reduce weight and cost.
[0014] One or more raised edges 11 are provided on the inner and outer walls of two mutually parallel sides of the body 1, and the cross section of the edges is semicircular. The number of edges 11 on the two sides is equal, and the number of edges 11 on the inner and outer walls of each side is equal. Figure 1 and Figure 2 There are two structures with different numbers of edges. The edges are set to increase the creepage distance and also to increase the compressive strength (the edges are equivalent to reinforcing ribs).
[0015] The utility model pad is formed by pultrusion of glass fibers impregnated with epoxy resin. Excess epoxy and bubbles are squeezed out during the pultrusion process, so there are no bubbles inside the product, the electrical performance is more superior, and the product can be produced continuously and cut according to the required length, so the manufacturing cost is lower and more convenient.
[0016] The above is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements without departing from the principle of the present invention, and these improvements should also be regarded as within the protection scope of the present invention.
Claims
1. A transformer insulating spacer, characterized in that: The invention comprises a body (1) formed by pultrusion of glass fibers impregnated with epoxy resin, wherein the body (1) is a hollow rectangular structure, and one or more raised edges (11) are provided on the inner and outer wall surfaces of two mutually parallel sides of the body (1).
2. The transformer insulating spacer according to claim 1, characterized in that: The number of edges (11) on the two sides is equal, and the number of edges (11) on the inner and outer walls of each side is equal.
3. The transformer insulating spacer according to claim 1, characterized in that: The cross section of the edge is semicircular.