Electromagnetic actuation stop valve for venting pile top of nuclear power station

Abstract

An electromagnetic actuation stop valve for venting a pile top of a nuclear power station comprises a main valve body assembly, an auxiliary valve body assembly, a valve cover, an electromagnetic driving mechanism, and an electric connector assembly, wherein the main valve body assembly comprises a valve body, a valve cylinder and a valve bush assembly, the valve bush assembly comprises a valve bush, a nonmagnetic pipe and an insulation cover, the lower end of the nonmagnetic pipe is in threaded connection with an upper port of the valve bush, the insulation cover is fixed in the valve bush, the valve bush is fixedly connected with the upper end of the valve body, a sleeve is disposed in the valve body, the auxiliary valve body assembly is formed by assembling a valve head, a valve rod and a piston, a guiding member is arranged between the valve bush and the valve body, a plurality of cooling fins are arranged on the outer wall of the valve bush, a plurality of maze grooves are formed in the outer wall of the insulation cover, and the electromagnetic driving mechanism comprises a movable iron core, a coil assembly, a coil outer shell, and a static iron core. The electromagnetic actuation stop valve must bear high-temperature and high-pressure pipeline ambient conditions and high-temperature, high-heat, and high-radiation environmental conditions and is small and light.

Description

technical field [0001] The invention relates to a valve, in particular to an electromagnetic stop valve for nuclear power plant reactor top exhaust. Background technique [0002] The large-scale advanced pressurized water reactor nuclear power plant (CAP1400) is one of the 16 major scientific and technological projects identified in the national medium and long-term scientific and technological development plan. It plays a very important role and is mainly used in the main system, core cooling system, sampling system and emergency inhabitable system. The pipelines of these systems are generally high-temperature and high-pressure media, and the working environment of the electromagnetic stop valve is also special, especially in accidents. Under working conditions, it is generally high humidity, high heat, high radiation, and accompanied by certain environmental pressure. [0003] In the past, due to the relatively weak domestic research foundation for high-temperature and h...

AI Technical Summary

Problems solved by technology

[0003]In the past, due to the weak domestic research foundation of high temperature and high pressure electromagnetic globe valves used in nuclear power plants, no matter in terms of product structure, or in terms of material selection and application It is impossible to guarantee the long-term continuous use of the product under the above-mentioned high-temperature and high-pressure system conditions and high-humidity, high-heat, and high-radiation environmental conditions, especially the clearance fit between the internal parts of the valve under high temperature and high pressure conditions and the sealing performance under continuous operating conditions, so The field of nuclear-grade electromagnetic globe valves used in nuclear power plants has been monopolized by foreign countries

Images