Connecting hardware fitting for sectional composite insulator

Abstract

The invention relates to a connecting hardware fitting for a sectional composite insulator, comprising two trough-type terminal hardware fittings having the same structure, and a connecting block, wherein each trough-type terminal hardware fitting comprises a sleeve structure with one opened end and a trough-type structure connected with the sleeve structure; a longitudinal connecting hole and a transverse connecting hole are respectively formed in the connecting block; a mounting hole in the trough-type structure of one trough-type terminal hardware fitting is connected with the longitudinal connecting hole of the connecting block through a fixed part, and the mounting hole in the trough-type structure of the other trough-type terminal hardware fitting is connected with the transverse connecting hole of the connecting block through a fixed part; and a pressure-equalizing shading ring is arranged on the sleeve structure of each trough-type terminal hardware fitting. The connecting hardware fitting solves the defect that the lengthy composite insulator is difficult to be carried to a construction field or can not be carried to the construction field; the connecting hardware fitting has the advantages of flexible freedom degree, safety and reliability, easy installation, cost conservation, and the like; and the connecting hardware fitting can be widely applicable to the connection of all sectional composite insulators, specifically the composite insulators under the condition of extra-high voltage or high voltage.

Description

technical field [0001] The invention belongs to the field of connection fittings, and in particular relates to a connection fitting of segmented composite insulators. Background technique [0002] Composite insulators are a special insulation space that can play an important role in overhead transmission lines. With the rapid development of my country's electric power industry, there are more and more overhead transmission lines with large capacity and high voltage levels. In order to meet the working requirements of overhead transmission lines, the length of composite insulators is required to be larger and larger, for example: ±800kV DC transmission demonstration The single-leg composite insulator used in the project has a length of 12.7 meters. As the length of the composite insulator continues to increase, its weight also increases accordingly. Therefore, transportation of this device has become a major problem in construction. [0003] In order to solve the defect that ...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the defect that composite insulators are difficult to transport as a whole, those skilled in the art think of solving the transportation problem through segmented production and transportation. The ring-shaped end fittings at the end of the segment composite insulator are directly connected, not only the degree of freedom of the fittings at both ends is not flexible enough, but also the ring-ring connection structure will extend the length of the entire composite insulator. The swing problem, so the overall length of the composite insulator directly affects the tower height and the size of the tower head of the high-voltage transmission tower. If the tower height is too high, the weight of the connecting tower will be increased. The cost and difficulty of on-site construction. Therefore, the present invention proposes a connection fitting for segmented composite insulators that is simple in structure, high in safety, low in cost, convenient for transportation of composite insulators, and able to meet the technical requirements of transmission lines.

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