Method for hoisting steel dome of nuclear power plant in balance-keeping manner

Abstract

The invention discloses a method for hoisting a steel dome of a nuclear power plant in a balance-keeping manner. The method is realized by cooperation of a balance hosting device of the steel dome of the nuclear power plant and hoisting machinery and comprises the steps of assembling in place, trial hoisting, hoisting and the like. A plurality of adjustments are carried out in each step to stress related components in a balance-keeping manner, so that the stability of the hoisting process is ensured. The method can ensure the balance of multi-point hoisting stress and accuracy of levelness of a lower opening of the dome, is applicable to hoisting and mounting of the dome of a containment of the nuclear power plant, is used for ensuring the balance of hoisting stress and accuracy of levelness of the lower opening of the dome, and is also applicable to the hoisting process of other spherical segment and spherical coronary objects.

Description

technical field [0001] The invention belongs to the field of hoisting of heavy objects, in particular to a balanced hoisting method 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, and a hoisting method needs to be designed to meet the overall hoisting requirements of the steel dome. The commonly used hoisting methods are balanced lever type and balanced pulley type: the balanced lever type has a single balance method, complex structure, and single use method; the balanced pulley type usually uses a lifting machine to lift objects vertically through a separately set sling rope, During the hoisting process, the object is prone to shaking, further increasing the pulling force on the sling, posing a safety hazard. [0003] Th...

AI Technical Summary

Problems solved by technology

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

[0003] The existing hoisting method adopts a four-point or eight-point multi-point hoisting method. 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 be realized 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 tension of the lifting rope, but also affect the accuracy of using the adjustment device to adjust the balanced force of the wire rope, and it is difficult to ensure that the dome lower opening level accuracy

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