Post insulator for 1500V rigid overhead contact line

Abstract

The invention relates to the technical field of electro-ceramics, in particular to a post insulator for a 1500V rigid overhead contact line. The post insulator comprises a ceramic body and metal accessories, wherein an upper metal accessory is provided with a lower cementing component and an upper top surface; umbrella skirts are arranged in the middle of the ceramic body; both sides of the upper top surface are provided with extension parts exceeding the cementing component; the extension parts and the upper top surface form a rectangular integral structure; one mounting hole is formed in each of the extension parts on both sides; the upper end of the ceramic body is provided with a first protruding cementing structure; the cementing component of the upper metal accessory is provided with an upper metal accessory groove capable of cementing the first cementing structure of the ceramic body; the first cementing structure is cemented inside the upper metal accessory groove; the lower end of the ceramic body is provided with a second cylindrical groove; the second cylindrical groove is of a second cementing structure; a lower metal accessory is cemented inside the second cementing structure. The post insulator has the advantages of higher firmness in installation, reduction of cost, freeness from looseness after long-term use and reasonable design.

Description

technical field [0001] The invention relates to the technical field of electric porcelain, in particular to an insulator. Background technique [0002] At present, most domestic rigid overhead catenary installations in tunnels use vertical suspension insulators. In this scheme, a pin insulator is used for insulation. The upper part of the insulator adopts an exposed screw rod, and the lower part adopts a built-in thread, which are respectively connected with related parts. Due to the high bending resistance of the insulator in the vertical suspension installation scheme, the problem that the bending resistance of the exposed screw of the pin-type insulator cannot meet the force demand in the project has brought certain restrictions to the selection of the project design. Therefore, it is necessary to develop a new type of rigid overhead catenary insulator and further improve the bending resistance of the rigid overhead catenary vertical suspension installation. [0003] Th...

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Problems solved by technology

[0003] The insulator includes a porcelain body and a metal attachment. The metal attachment and the porcelain body are glued together. The metal attachment includes an upper metal attachment and a lower metal attachment. The upper metal attachment has an upper top surface. Fixed parts; in the prior art, the fixed parts are either a protruding columnar structure or a mounting hole, so the insulator has the disadvantages of not being firmly installed, unstable, inconvenient to install, and easy to loosen after long-term use. It affects the installation and long-term use of insulators. Some insulators can be installed firmly, but their cost is relatively high

[0004] In addition, in the prior art, insulators involving 1500V also have unreasonable size design, for example, they are either designed to be too large, which increases production costs and weight, and also has the disadvantage of inconvenient installation; for example, either The size of the insulator is small, or the structure is unreasonable, which cannot meet the requirements of creepage distance, withstand strength, and lightning full-wave impulse withstand voltage, which also affects its normal use.

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