Monkey wrench

Abstract

The invention belongs to the technical field of nuclear power, and particularly relates to a monkey wrench. The monkey wrench comprises a torque measuring instrument, a screw, a connecting block, a nut, a movable jaw and a fixed jaw, and a first through hole is formed in the connecting block in the radial direction, the screw penetrates through the first through hole, and one end of the screw is fixedly connected with the fixed jaw. A second through hole is formed in the outer surface of the connecting block and penetrates through the outer surface of the connecting block and the first through hole, and the lower end of the connecting block is fixedly connected with the movable jaw; and the two ends of the nut are connected to the side wall of the first through hole through shafts, threads on the outer surface of the nut are meshed with the screw, and when the nut is rotated, the connecting block can drive the movable jaw to move in the radial direction of the screw. The other end of the screw is connected with the measuring end of the torque measuring instrument, and the torque measuring instrument can detect and display the torque borne by the screw. The distance between the movable jaw and the fixed jaw can be adjusted, so that the monkey wrench flexibly adapts to most hand wheels of different sizes in a nuclear power plant, and the working efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of nuclear power, and in particular relates to an adjustable wrench. Background technique [0002] In the related technology, according to the requirements of "0426G4001 General Technical Conditions for Nuclear Island Valves", the total operating force at the start and end of the stroke is not more than 600N (Newton), regardless of whether the reduction gear device is used, the tangential operation of the manual operation device When the force is equal to 900N, the valve should not produce permanent deformation, and the sealing surface of the globe valve should not be damaged. JB / T 8531-2013 requires that the maximum handwheel force of manual devices should generally be less than 300N. When the manual device is momentarily subjected to twice the rated torque or thrust, all bearing parts should not be damaged. The possibility of operating over-torque has been considered in the design of the valve, so there ...

AI Technical Summary

Problems solved by technology

However, the existing F-type wrenches in nuclear power plants have the following deficiencies in the valve switch operation: (1) when operating the valve switch, most of them subjectively think that the operation is in place when the switch does not move, that is, the inaccurate torque switch operation

This method of operation violates the requirements of "0426G4001 General Technical Conditions for Nuclear Island Valves", endangers the normal operating life of the equipment, and brings hidden dangers to the safe and stable operation of the nuclear power plant system; It is easy to slip, and there is a potential industrial safety hazard of personal injury after slipping; (3) The size of the jaw cannot be adjusted with a fixed open F wrench. cause physical fatigue

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