Control rod driving mechanism with safety protection function

Abstract

The invention discloses a control rod driving mechanism with a safety protection function. The control rod driving mechanism comprises a rod position detector assembly, a pressure-resistant shell assembly, a claw assembly, a driving rod assembly, a coil assembly and a safety anti-expansion device. A safety protection device comprises a tipping magnetic pole, a tipping locking coil, a tipping spring, a tipping armature, a tipping claw and a transition supporting sleeve. A sealing shell is fixed to the transition supporting sleeve through the tipping magnetic pole, and the transition supportingsleeve is connected with the claw assembly in an assembled mode. The tipping armature is arranged on the transition support sleeve in a sliding manner; one end of the tipping spring elastically abutsagainst the tipping armature, and the other end of the tipping spring elastically abuts against the tipping magnetic pole or the transition supporting sleeve. The tipping claw is arranged on the transition supporting sleeve and is linked with the tipping armature; the driving rod assembly is arranged on the transition supporting sleeve and the tipping magnetic pole in a penetrating manner; the tipping locking coil is installed on the coil assembly, and the tipping armature is in linkage with the tipping claw in the axial sliding process to do pivot swing motion of being engaged with or disengaged from the driving rod assembly. Therefore, the safety function of tipping and locking is achieved, and safe shutdown of the reactor is achieved.

Description

technical field [0001] The invention relates to the field of nuclear reactors, in particular to a control rod driving mechanism with a safety protection function. Background technique [0002] As we all know, when some reactors are in a periodical swing state, especially under extreme environmental conditions, the reactor will swing at a large inclination angle, or even overturn. [0003] At present, the reactor control rod drive mechanism used at home and abroad is not equipped with a safety protection mechanism with a tipping and locking function. Although the reactor control rod drive mechanism can also realize the function of dropping the control rod when the reactor is swaying at a small angle, it ensures the safety of the reactor. When a large tilt angle swings or even overturns, the control rod assembly inserted into the bottom of the core may come out of the core, so that the safe shutdown of the reactor cannot be guaranteed. [0004] Therefore, there is an urgent n...

AI Technical Summary

Problems solved by technology

[0002] As we all know, some reactors are in a periodical swing state, especially under extreme environmental conditions, the reactor will swing at a large inclination angle, or even tip over

[0003] At present, the reactor control rod drive mechanism used at home and abroad is not equipped with a safety protection mechanism with a tipping and locking function. Although the reactor control rod drive mechanism can also realize the function of dropping the control rod when the reactor is swaying at a small angle, it ensures the safety of the reactor. safe shutdown of the reactor; and when a large inclination angle swings or even overturns, the control rod assembly inserted into the bottom of the core may come out of the core, so that the safe shutdown of the reactor cannot be guaranteed

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