Nuclear reactor safety rod with rotating mechanism and its sealing structure

Abstract

The invention discloses a nuclear reactor safety rod with a rotating mechanism and a sealing structure of the safety rod. The nuclear reactor safety rod comprises a travel chamber which is mainly composed of a pressure chamber seal head of a nuclear reactor, a travel shell fixed on the outer surface of the pressure chamber seal head, and a travel top cover, wherein a safety rod of which one end stretches into the nuclear reactor is arranged in the travel chamber; the other end of the safety rod is connected with a transmission shaft; a rotating mechanism is arranged on the top of the transmission shaft; a lifting control mechanism is arranged in the middle of the transmission shaft; and a sealing structure is formed in the joint of the safety rod and the pressure chamber seal head in the nuclear reactor. According to the nuclear reactor safety rod disclosed by the invention, the rotating mechanism of the safety rod in the nuclear reactor is increased, the sealing structure of the safety rod is improved, the safety rod is rotated by virtue of the rotating mechanism so as to cause contact surface variation with the pressure chamber seal head, eccentric wear of the safety rod caused by shake of the nuclear reactor is avoided, and the service life is prolonged. Meanwhile, the sealing structure around the safety rod is improved, the safety rod is convenient to rotate, and zero leakage of inside heavy water is realized.

Description

technical field [0001] The invention relates to a nuclear reactor safety bar with a rotating mechanism and its sealing structure, belonging to the technical field of ship nuclear power. Background technique [0002] The way human beings consume excessive disposable energy to develop economy must be changed. In the next forty years, safe, clean, efficient and reliable nuclear energy installations will enter a period of rapid development, and nuclear power installations for ships with a reactor power of 60,000 kilowatts and above will receive increasing attention. [0003] At present, commercial ships are powered by diesel engines or steam turbines. Along with economic development, ship nuclear power plant with a power of more than 60,000 kilowatts will surely appear in people's field of vision. The cruising range of the "Trident" nuclear submarine reaches 1 million nautical miles, and the cruising range of ultra-large merchant ships (with a load capacity of more than 300,00...

AI Technical Summary

Problems solved by technology

However, because the pressure tube of the cross-pipe pressure reactor is inclined (18-23 degrees from the plumb line) (in order to increase the gap between the filling and unloading valves), the safety rod is extremely easy to wear on one side, and its The seal is also prone to wear and has a short service life

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