110KV intermediate head and production process thereof

Abstract

The invention provides an 110KV intermediate head and a production process thereof. The intermediate head comprises two stress cones (1), a screening tube (2), insulating layers (3) and outer screening layers (4), wherein the screening tube (2) is arranged between the two stress cones (1); the insulating layers (3) are filled between the screening tube (2) and the two stress cones (1); and the outer screening layers (4) are coated outside the insulating layers (3). The process of producing the 110KV intermediate head comprises three formations, that is, the first formation is the formation ofthe conductive stress cones and the screening tube; the second formation is the formation of the insulating layers: the formed stress cones and a formed stress tube are arranged in a mould during glue injection and then integrated after formation; and the third formation is the formation of outer conducting layers: all parts are integrated after formation to form the intermediate head. The formedinsulating layers of the intermediate head are made from transparent insulated rubbers, thus being high in visibility and being convenient to check.

Description

technical field [0001] The invention relates to a production process of an intermediate joint, and in particular specifies the production flow and production method of a 110KV intermediate joint. Background technique [0002] The cable intermediate joint is used as the conductor, insulation shielding layer and protective layer connecting the cable and the cable to connect the cable line. Usually, the cable intermediate joint has a stress cone, a shielding tube, an insulating layer and an outer shielding layer. The stress cone, shielding tube and outer shielding layer are made of conductive silicone rubber, and the insulating layer is made of insulating silicone rubber, which is molded by multiple injections of silicone rubber; The existing production process is to produce the stress cone, shielding tube and outer shielding layer first, and then inject insulating silicone rubber, which is integrated with the stress cone, shielding tube and outer shielding layer; there are two...

AI Technical Summary

Problems solved by technology

[0003] One is to install the stress cone, shielding tube and outer shielding layer at the fixed position of the insulating silicone rubber mold before injecting insulating silicone rubber. Because the outer shielding layer is relatively thin and bulky, it is easy to deform during installation and difficult to assemble; when injecting silicone rubber The pressure is difficult to control, and the pressure control is not good. There are problems such as glue passing and outer shielding layer being squeezed and deformed. Although this process can be produced, the yield is not high, and the process parameters are difficult to control.

[0004] The second is that the insulating part of the existing intermediate joint is made of colored opaque insulating silicone rubber, while the stress cone, shielding tube and outer shielding layer are made of black opaque conductive silicone rubber. When injecting insulating silicone rubber, there may be volume Larger impurities are brought into the insulating silicone rubber. After vulcanization and molding, the insulating part is wrapped by the outer shielding layer, which cannot be inspected directly with the naked eye. If there are too many impurities in the insulating silicone rubber, it will have a serious impact on the electrical properties of the rubber. Sometimes it will cause partial discharge, which will affect the service life of the intermediate joint, and in severe cases, it will directly break down

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