A high-strength insulating spacer for transformer

Abstract

The utility model discloses a high-strength insulating pad for a transformer, comprising a block body formed by pultrusion of glass fiber impregnated with epoxy resin, wherein a regular through hole is provided in the middle of the body. The pad of the utility model can meet the required electrical performance requirements without oil impregnation, greatly shortens the production cycle of the transformer, is light in weight and has high strength. The pad of the utility model will not be compressed and deformed when under pressure like the pad of traditional laminated paperboard or laminated wood, which makes the transformer more rigid and more resistant to short circuits.

Description

Technical Field

[0001] The utility model relates to a high-strength insulating pad for a transformer. Background Art

[0002] In oil-immersed transformers, a large number of rectangular insulating blocks are used. In the past, laminated paperboard or laminated wood was used. Laminated paperboard is made of electrical paperboard that is impregnated with glue and then pressed by heating and curing. Laminated wood is made of special wood slices that are compacted to increase density, and then laminated with glue and heated and cured. These blocks are solid and must be fully immersed in oil to meet the corresponding electrical performance requirements. The time for full oil immersion is long and there are many processing steps, so the cost is correspondingly high. In addition, a large amount of waste is generated during the processing, and a large amount of glue is used, which does not meet environmental protection requirements. Summary of the invention

[0003] The utility model provides a high-strength insulating pad for a transformer in order to solve the problems existing in the prior art.

[0004] The technical solutions adopted in this utility model are:

[0005] A high-strength insulating spacer for a transformer comprises a block body formed by pultrusion of glass fibers impregnated with epoxy resin, wherein a regular through hole is arranged in the middle of the body.

[0006] Furthermore, the main body is also provided with a reinforcement layer formed of glass fiber cloth, and the glass fiber cloth is formed by pultrusion together with glass fibers.

[0007] Furthermore, the reinforcement layer forms the outer wall surface of the block body.

[0008] The utility model has the following beneficial effects:

[0009] 1) The utility model pad can meet the required electrical performance requirements without oil immersion treatment, greatly shortens the production cycle of the transformer, is light in weight and high in strength.

[0010] 2) The cushion block of the utility model will not be compressed and deformed when under pressure like the cushion blocks of traditional laminated paperboard or laminated wood, which makes the transformer more rigid and more resistant to short circuits.

[0011] 3) Existing insulating pads are made of laminated paperboard or laminated wood, whose raw materials are trees, which causes waste of resources, damages the environment, and has high economic costs. Glass fiber uses sand as the main raw material, which is low in cost and abundant in resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a structural diagram of the utility model.

[0013] Figure 2 This is a structural diagram of the utility model. DETAILED DESCRIPTION

[0014] The utility model is further described below in conjunction with the accompanying drawings.

[0015] The utility model discloses a high-strength insulating spacer for a transformer, comprising a block body 1 formed by pultrusion of glass fibers impregnated with epoxy resin, wherein a regular through hole is arranged in the middle of the body.

[0016] The utility model uses glass fiber that is impregnated with epoxy resin and then produced into an insulating pad through a pultrusion process, and can realize automated operation during the production process, with extremely low labor costs.

[0017] The utility model has high mechanical strength and does not need to be solid. It can be made into a hollow shape as shown in the figure. Figure 1 The block body 1 with three opening structures is shown in the figure, a is a waist-shaped hole, b is two symmetrical waist-shaped holes, and c is a rectangular waist-shaped hole. The weight is reduced while ensuring the required mechanical strength, thereby greatly reducing the weight of the transformer. The utility model can also make the cushion block into a U-shaped structure.

[0018] The utility model pad block can meet the required electrical performance requirements without oil immersion treatment, thereby greatly shortening the production cycle of the transformer.

[0019] The cushion block of the utility model will not be compressed and deformed when under pressure like the cushion blocks of traditional laminated paperboard or laminated wood, which makes the transformer more rigid and has a stronger short-circuit protection capability.

[0020] The cushion block of the utility model hardly generates waste materials during the production process, thus reducing costs and meeting environmental protection requirements.

[0021] The cushion block of the utility model can be used to make various insulating structural parts in transformers, such as stays, beams, etc. It can be used in oil-immersed transformers and can also be used as coil cushion blocks in dry-type transformers.

[0022] In order to improve the mechanical strength of the product in terms of torsion resistance, a reinforcement layer 2 formed of glass fiber cloth is also provided on the outer side of the main body. The reinforcement layer 2 eventually forms the outer wall surface of the block body. The glass fiber cloth is formed by pultrusion together with glass fibers.

[0023] 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 high-strength insulating spacer for a transformer, characterized in that: It comprises a block-shaped body formed by pultrusion of glass fiber impregnated with epoxy resin, and a regular through hole is provided in the middle of the body; The main body is also provided with a reinforcement layer formed of glass fiber cloth, and the glass fiber cloth is formed by pultrusion together with glass fibers.

2. The high-strength insulating spacer for transformer according to claim 1, characterized in that: The reinforcement layer forms the outer wall surface of the block body.

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