Composite insulator by injection molding once

Abstract

The invention discloses a composite insulator by injection molding once, and relates to an insulator for power transmission lines. The composite insulator comprises a mandrel bar, a hardware fitting with tubular joints, an umbrella-shaped insulator, and sheaths arranged at the two ends of the umbrella-shaped insulator, wherein the sheaths are positioned on the surface of the mandrel bar and connected with the mandrel bar fixedly, and the two ends of each of the sheaths are respectively fixedly connected with pipe orifices of the hardware fitting of which the two ends are provided with the tubular joints; the pipe orifices of the tubular joints of the hardware fitting towards the umbrella-shaped insulator are provided with stepped circles; and the sheaths at the two ends of the umbrella-shaped insulator at least coat the stepped circles at the pipe orifices of the hardware fitting and are fixedly connected with the stepped circles in a water sealing manner. The insulator not only improves the connection strength of the sheaths, the mandrel bar and the hardware fitting, but also greatly improves the water sealing effect due to the addition of a plurality of junction surfaces. In order to further improve the water sealing effect, at least one circle of groove is arranged on the outer revolution surfaces of the stepped circles, and the number of the junction surfaces is increased, so the sealing effect is further improved. Finally, the umbrella-shaped insulator is combined according to the size of the umbrella shape so as to effectively overcome creepage.

Description

Technical field [0001] The invention relates to an insulator for power transmission lines, in particular to a one-shot injection molding composite insulator. Background technique [0002] Porcelain and glass insulators are widely used in power transmission lines. Insulators made of these traditional materials are heavy and easy to break. These insulators are breakdown-type insulators. The product must be zero-valued before use. Detection. In addition, during installation, these insulators are assembled from many parts on the tower. During the installation process, connection, assembly, and zero value detection are required, which increases the labor intensity of the installation. Many electric workers generally feel that the use of traditional insulators is inconvenient when installing and operating. At present, injection molded composite insulators have appeared, which have the characteristics of lightness, high integrity and easy installation. However, it was found in produc...

AI Technical Summary

Problems solved by technology

However, it was found in production that when the insulator sheath made of composite materials is connected to the fittings, it is difficult to achieve a complete seal at the joint, resulting in water seepage. Water seepage during long-term use will affect the performance of the mandrel, causing the mandrel to hydrolyze, and then break the insulator. , resulting in electrical accidents

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