Balanced hoisting device for nuclear power plant steel dome

Abstract

The invention discloses a balanced hoisting device for a nuclear power plant steel dome. The balanced hoisting device is used in cooperation with hoisting machines and comprises a hoisting unit and a fixing unit. The hoisting unit comprises main hoisting steel wire ropes, at least one layer of balance pulley and at least one layer of auxiliary hoisting steel wire rope. The fixing unit comprises at least two fixing ropes and second adjusting devices fixed to the lower ends of the fixing ropes. When the number of the main hoisting steel wire ropes is larger than or equal to two, a first adjusting device used for adjusting the balance stress of the corresponding auxiliary hoisting steel wire rope is fixed to the tail end of any one of auxiliary hoisting steel wire ropes of the corresponding last layer of each main hoisting steel wire rope. The fixing unit comprises at least two fixing ropes and the second adjusting devices fixed to the lower ends of the fixing ropes. According to the balanced hoisting device, multi-point hoisting stress balance and levelness accuracy of a lower opening of the dome can be guaranteed. The balanced hoisting device is suitable for hoisting and installing the nuclear power plant safety shell dome and used for guaranteeing the hoisting stress balance and the levelness accuracy of the lower opening of the dome and can also be used for hoisting other spherical-segment-shaped objects and spherical-crown-shaped objects.

Description

technical field [0001] The invention belongs to the field of hoisting of heavy objects, in particular to a balanced hoisting device for a steel dome of a nuclear power plant. Background technique [0002] The steel dome of the nuclear power plant is heavy and heavy, and the symmetrical hoisting points are far apart, and because the levelness of the lower opening of the dome must be ensured during hoisting, the hoisting is difficult. It is necessary to design a hoisting device to meet the overall hoisting requirements of the steel dome. The commonly used hoisting devices are balance lever type and balance pulley type: the balance lever type has a single balance method, complex structure, and single use method; the balance pulley type usually uses a lifting machine to lift objects vertically through a separately set sling , the object is prone to shaking during the hoisting process, further increasing the pulling force on the sling, and there is a potential safety hazard. [...

AI Technical Summary

Problems solved by technology

The commonly used hoisting devices are balance lever type and balance pulley type: the balance lever type has a single balance method, complex structure, and single use method; the balance pulley type usually uses a lifting machine to lift objects vertically through a separately set sling , the object is prone to shaking during the hoisting process, further increasing the tension on the sling, posing a safety hazard

[0003] The existing hoisting device adopts a four-point or eight-point multi-point hoisting method, and the steel wire rope of each lifting point is equipped with an adjustable device. It is necessary to adjust the length of each wire rope many times to achieve the overall force balance, but it cannot Realize the complete balance of force on multiple lifting points; moreover, if the force on the lifting point is too large, it will not only increase the pulling force of the lifting rope, but also affect the accuracy of adjusting the balance force of the steel wire rope with the adjustment device, making it difficult to ensure the balance of force under the dome. Mouth Level Accuracy

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