Crane foreign matter falling protection device

Abstract

The invention discloses a crane foreign matter falling protection device and relates to crane equipment. The crane foreign matter falling protection device comprises a crane. A lifting mechanism is arranged on the crane. An upper flange is connected with the lifting mechanism. A lower flange is connected with the upper flange through a telescopic shield. A steel wire rope penetrates through the upper flange, the telescopic shield and the lower flange to be connected with a lifting hook. The lower flange is fixed to the upper portion of the lifting hook. A dust collection tray is fixed betweenthe lower flange and the lifting hook. The two ends of the telescopic shield are fixed between the upper flange and the lower flange, the shield is contracted when the lifting hook is lifted and stretched when the lifting hook is descended, and effective protection against foreign matter produced in the lifting process of the crane can be achieved; and meanwhile, the metal dust collection tray with the diameter being larger than that of a protection pipe is additionally arranged on the upper portion of the lifting hook, traces of fallen foreign mater can be collected, and foreign matter is completely prevented from falling into an GIS.

Description

technical field [0001] The invention relates to crane equipment, in particular to a protection device for foreign objects falling from driving. Background technique [0002] Gas-insulated and enclosed metal switchgear (GIS for short) uses SF6 gas as the insulating medium, and is composed of circuit breakers, disconnectors, grounding switches, busbars, voltage transformers, current transformers and control and auxiliary circuits. It is an important primary equipment for substations. It has the characteristics of small footprint and convenient maintenance, and is widely used, basically replacing open equipment. [0003] Foreign matter in GIS (including metal foreign matter and non-metallic foreign matter) has a greater impact on GIS insulation. If there is foreign matter in GIS left or suspended on the surface of the insulating part, it should form a "small bridge" to cause resistance when high voltage is withstood. Pressure breakdown. Rework and repair will waste time and i...

AI Technical Summary

Problems solved by technology

Rework and repair will waste time and increase costs, so all GIS manufacturers have formulated strict foreign matter control and environmental control measures in the production process

[0004] During the GIS production process, the transfer and docking of the units must use the crane (the truck crane is used on site). During the hoisting process, due to the friction of the driving rail and the wire rope, foreign objects may be generated and fall into the GIS tank, which will have a great impact on the GIS insulation.

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