Crane hoisting mechanism with anti-falling type hand-operating device for nuclear power station

Abstract

The invention discloses a crane hoisting mechanism with an anti-falling type hand-operating device for a nuclear power station. The crane hoisting mechanism comprises an electric motor, a winding drum set, a brake, a brake wheel shaft coupler, a speed reducer and a handle mechanism, wherein a friction sheet I, a friction plate, a fixed plate, a friction plate and a friction sheet II of the handle mechanism are sequentially arranged on the shaft sleeve in a penetrating and sleeving mode; the shaft sleeve is arranged at the front section of a flange shaft sleeve of a flange in the sleeving mode; a central screw hole of the hand wheel is screwed in right-hand threads at the middle section of the flange shaft sleeve; a retainer ring is arranged at the rear section of the flange shaft sleeve of the flange in the penetrating mode; all parts are fixed together by virtue of a disc spring and a nut; springs is arranged between the external circumference of the fixed plate and a fixed flange; and the other end of the fixed flange is fixed on a fixed base through a pin roll. The crane hoisting mechanism has the beneficial effects that the load is prevented from automatically dropping, the structure is simple, the arrangement is convenient, the dismounting is convenient, and the same set of device can be used for multiple hoisting mechanisms.

Description

technical field [0001] The invention relates to a lifting mechanism of a crane in a nuclear power plant, in particular to an anti-falling type manual device. . Background technique [0002] The nuclear power plant fuel delivery crane is used to lift the fuel assembly of the nuclear power plant. The fuel assembly is a dangerous load. When the crane fails or the power is cut off during the hoisting process, it must be ensured that the fuel assembly can be placed in a safe place. Therefore, the lifting mechanism of this type of crane With manual mechanism. [0003] The patent number is: CN200520128465.1.A, and the patent document titled: "Manual Mechanism of Crane Hoisting Mechanism" discloses the structural form of this type of manual mechanism, which is a ratchet and pawl structural form. The disadvantage of this patented technology is: only when the manual device lifts the load, the operator's hand can automatically prevent the load from falling automatically after the ope...

AI Technical Summary

Problems solved by technology

The disadvantage of this patented technology is that only when the manual device lifts the load, the operator's hands can be separated from the operating handle to automatically prevent the load from falling automatically. When the manual device lowers the load, it cannot automatically prevent the load from falling automatically.

In addition, the ratchet and pawl manual mechanism has a complex structure and takes up a lot of space.

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