Cantilever swing rod type labor-saving extraction device

Abstract

The invention belongs to the field of nuclear power engineering of nuclear power plants, and in particular, relates to a cantilever swing rod type labor-saving extraction device. The technical problemto be solved by the invention is to provide the cantilever swing rod type labor-saving extraction device; a manipulator is simple in structure, and can realize movement of a main bolt in X, Y and Z directions in a moving range of the cantilever swing rod type labor-saving extraction device; and manual operation in traditional carrying of the main bolt is replaced by mechanical movement, so that the operation safety risk is reduced, the labor intensity of maintainers is relieved, the working efficiency is improved, and the collective dose value is reduced. The device comprises an upper supportframe (1), a fixed bolt (2), a cantilever base (3), a bearing module, a reinforcing rib plate (8), a channel steel swing cantilever (9), a rolling wheel (10), a rolling module, a bolt (12), a liftingbelt (13), a labor-saving balancer (14), a special switching screw (15), the main bolt (16) and a baffle plate (17).

Description

technical field [0001] The invention belongs to the field of nuclear power engineering of nuclear power plants, and in particular relates to a cantilever swing rod type labor-saving extraction device. Background technique [0002] In the dismantling and overhaul of the nuclear reactor coolant pump, a relatively basic and very important maintenance procedure will be involved, that is, to perform service inspection on the 30 main bolts evenly distributed on the main joint surface of the nuclear reactor coolant pump. The bolts are disassembled and transported to the maintenance workshop for service inspection, and then reassembled after the service inspection is completed. When disassembling, it is necessary to loosen 30 main bolts from the bolt holes on the main joint surface, and then extract and transport them to the main bolt transport shelf and transport them to the maintenance workshop. Pick up and transport the shelf to the corresponding bolt hole position on the main j...

AI Technical Summary

Problems solved by technology

The weight of a single main bolt is about 45kg, and the total weight of the accumulative extraction and transportation is as high as 2700kg. Because the weight and volume of a single main bolt are relatively large, there will be a considerable safety risk in manual handling. Bumps to personnel and equipment

Moreover, in the process of disassembling and reinstalling the main bolts, maintenance personnel need to complete 30 times of loosening and 30 times of tightening the main bolts weighing about 45kg. This workload is quite large. It is conceivable that the labor intensity to complete the disassembly and assembly of the main bolts by physical strength is directly proportional to the time required for the completion of the work, which will not only delay the maintenance time of the main line, but also increase the collective dose of overhaul value

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