Device for transferring and hoisting heavy equipment

Abstract

The invention belongs to the field of machinery, and particularly relates to a device for transferring and hoisting heavy equipment. An existing transfer and hoisting mode causes long maintenance and transfer time, and the collective and individual dose irradiation risk is high. Therefore, overhaul end face overall maintenance time is affected, and the overall plan of grid-connected power generation of a unit is influenced. The device comprises a vehicle frame, an operating hand lever, a hoisting device and a driving device; the driving device comprises a motor, a speed reducer and a chain; and the operating hand lever is connected with a vehicle axis, the upper portion of the vehicle frame is a step-shaped platform, and the shape of the upper portion of the vehicle frame is the same as that of the lower portion of a driving unit. According to the device, the purposes that equipment is stably transferred and hoisted, maintenance manpower is greatly reduced, maintenance and transfer time is shortened, personnel collective and individual dosages are reduced, and grid-connected power generation of the unit according to normal planned time are ensured are fulfilled.

Description

technical field [0001] The invention belongs to the field of machinery, and in particular relates to a device for transferring and hoisting heavy equipment. Background technique [0002] One of the biggest features of the heavy water reactor nuclear power unit of Qinshan Third Nuclear Power Plant is that it does not stop refueling, and the refueling is done four days a week. Every time when refueling, the 181-ton loading and unloading machine screen door is opened, and the loading and unloading machine can carry out refueling. The loader screen door provides a radiation and ventilation barrier between the loader maintenance area and the reactor. The reactor is at full power, allowing personnel to safely perform maintenance on the loader and ancillary equipment. [0003] The screen door of the 181-ton loading and unloading machine is driven by two 7.5-ton drive units. The overhaul of the drive unit equipment can only be carried out during the overhaul period. The drive un...

AI Technical Summary

Problems solved by technology

The drive unit equipment is located in a high-radiation area, where the maintenance space is small, the weight of the single equipment is heavy, the bottom is irregular, the center of gravity of the equipment is not on the center, personnel cannot transfer the equipment normally, and the drive unit is transported with load-bearing rollers, the equipment is easy to tilt and has no driving force , driven by a dozen manpower and chain hoists

According to the principle of radiation optimization, the equipment should be transported to the low-radiation area for maintenance as soon as possible, but the equipment body has fixed pollution and other reasons, so it must be transported and hoisted from the reactor building to the auxiliary power building for maintenance, requiring two hoistings

The existing transfer and hoisting methods lead to long maintenance and transfer time, and high risks of collective and individual dose exposure

Affect the overall overhaul time of the overhaul end face, thus affecting the overall plan of the unit grid-connected power generation

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