Control rod driving mechanism and claw assembly with radial limiting and centering function

Abstract

The invention discloses a claw assembly with a radial limiting and centering function. The claw assembly comprises an upper end component, a lifting armature, a moving armature, a claw, a maintainingmagnetic pole, a maintaining armature, a claw supporting sleeve, a lower end component, a sleeve shaft and a radial limiting and centering structure. The upper end component, the sleeve shaft and thelower end component jointly define an axial channel. The radial limiting and centering structure is formed on the channel wall of the axial channel, the radial limiting and centering structure enablespart of the axial channel to define a radial limiting and centering channel allowing the driving rod assembly to penetrate through and conducting radial limiting and centering on the driving rod assembly, and the size of the radial limiting and centering channel is smaller than that of the axial channel; therefore, the shaking of the driving rod assembly is limited under complex working conditions such as inclination and swinging, and the driving rod assembly is limited and centered, so that the reliable action of the control rod driving mechanism and the safe operation of the reactor are ensured. In addition, the invention further discloses a control rod driving mechanism.

Description

technical field [0001] The invention relates to the field of nuclear reactors, in particular to a control rod drive mechanism and a claw assembly with radial limit and centering thereof. Background technique [0002] As we all know, some reactors will be in occasions such as periodic rocking and tilting, which will produce a qualitative change in the motion environment of the claw assembly and the drive rod assembly of the control rod drive mechanism. [0003] At present, for example, in the step-by-step magnetic lift type reactor control rod drive mechanism disclosed in Chinese Patent Application No. 200710050738.9, it can operate normally when it is in a vertical working state; The drive mechanism of the advanced magnetic lifting control rod is always in a swing or tilt state, which will not only cause a large impact on the moving parts of the hook assembly, but also have an adverse effect on the lifting, insertion and drop of the drive rod assembly. , and even the safe o...

AI Technical Summary

Problems solved by technology

[0003] At present, for example, in the step-by-step magnetic lift type reactor control rod drive mechanism disclosed in Chinese Patent Application No. 200710050738.9, it can operate normally when it is in a vertical working state; The drive mechanism of the advanced magnetic lifting control rod is always in a swing or tilt state, which will not only cause a large impact on the moving parts of the hook assembly, but also have an adverse effect on the lifting, insertion and drop of the drive rod assembly. , even the safe operation of the reactor cannot be guaranteed

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