Driving mechanism for control rod of high-temperature gas-cooled reactor

Abstract

The invention discloses a driving mechanism for a control rod of a high-temperature gas-cooled reactor, belonging to the field of nuclear reactor equipment. The driving mechanism comprises a motor, a speed reduction mechanism, an endless-chain mechanism, a speed limiting mechanism, a rod position measuring mechanism, a control rod limit device, a locking and sealing mechanism and a manual liftingmechanism, wherein the motor is of a double-shaft-extension structure, the upper shaft extension of the motor is connected with the control rod limit device, and the lower shaft extension of the motor is connected with the speed reduction mechanism; the speed reduction mechanism is a three-stage cone-cylinder gear reducer; the speed limiting mechanism and the manual lifting mechanism are arrangedon the input shaft of the speed reduction mechanism; and the endless-chine mechanism and the rod position measuring mechanism are arranged on the output shaft of the speed reduction mechanism. According to the invention, the travel range of a control rod can be limited through the interlocking of the control rod limit device and the motor, the connection between a control rod drawing stick and the control rod is convenient and reliable, the control rod can be lifted manually during overhauling and debugging, and gas in the reactor can be prevented from leaking or external air can be preventedfrom rushing into a reactor core during overhauling and debugging.

Description

technical field [0001] The invention relates to the field of nuclear reactor equipment, in particular to a high-temperature gas-cooled reactor control rod driving mechanism. Background technique [0002] High-temperature gas-cooled reactor is an advanced reactor type with the characteristics of the fourth-generation reactor. Its development has experienced high-temperature gas-cooled experimental reactor, high-temperature gas-cooled demonstration reactor, modular high-temperature gas-cooled experimental reactor and modular high-temperature gas-cooled reactor demonstration power station. several stages of development. The control rod driving mechanism of high temperature gas-cooled reactor is an important safety equipment of the reactor. Under the normal working condition of the high temperature gas-cooled reactor, the control rod driving mechanism drives the control rod to move in the reactor at a certain speed, adjusts the reactivity of the core, and realizes the start-up,...

AI Technical Summary

Problems solved by technology

In addition, the stroke of the control rods in commercial high-temperature gas-cooled reactors is long, and the weight of the control rods is heavy. The existing control rod drive mechanism technology is difficult to solve the reliability of the transmission and the rod position measurement under such harsh working conditions and long strokes. The accuracy of the control rod, the limit of the control rod and the braking when the rod is dropped quickly

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