drop guard

Abstract

The invention discloses a falling type protective cover. The protective cover comprises a protective umbrella and a protective box; the protective umbrella comprises an umbrella-shaped shroud ring and a sealing ring; the protective box comprises a casing, a revolving door, a shift lever, a proximity switch assembly and a torsion spring; one side of the casing is provided with an opening, and the revolving door is mounted in the side with the opening; a rotating shaft of the revolving door is rotationally mounted at one side of the casing, and the torsion spring is mounted on the rotating shaft; one end of the torsion spring is fixed to the casing, and the other end of the torsion spring is fixed to the rotating shaft; one end of the shift lever is mounted on the rotating shaft and is positioned over the torsion spring; a block is arranged outside the connecting end of the shift lever; the upper and lower ends of the rotating shaft extend out of the casing and are fixedly connected with the revolving door; and the casing is further provided with a baffle plate, and the baffle plate is positioned in a position where the suspended end of the shift lever rotates to a closing state. The falling type protective cover can protect an opening / closing conductor contact comprehensively, the protective casing protects the contact against rain, snow and freezing effectively, and the protective cover can be opened or closed automatically according to opening / closing requirements.

Description

technical field [0001] The invention relates to the field of overhead power transmission line engineering, in particular to a drop-type protective cover. Background technique [0002] In the cold winter, some transmission lines in southern my country are prone to icing. Uneven icing on conductors and ground wires will cause the tower to tilt or bend. When the design capacity is exceeded, conductors and ground wires will break, hardware will fall off, etc., which will seriously cause the tower to collapse. The overhead ground wire is not like a wire that can resist partial freezing through the heat generated by the load current, and its ice thickness is generally far greater than that of the transmission wire. [0003] In January 2008, the collapse of the iron tower caused by the large-scale icing of the transmission line in southern my country is still fresh in everyone's memory. [0004] In February 2008, the China Southern Power Grid Technology Research Center organized ...

AI Technical Summary

Problems solved by technology

[0007] For the arm length longer than the length of the jumper string, the side-mounted ground wire melting automatic wiring device scheme is still used; for the short-arm cross-arm, there is not enough space to install the side-mounted device

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