A high-precision valve position acquisition device resistant to high temperature and nuclear radiation

Abstract

The present invention relates to a high-precision valve position acquisition device that is resistant to high temperature and nuclear radiation, which can be used for collecting valve stem position information of working valves in high temperature and nuclear radiation environments, and realizing full-position detection and control during valve switching. The present invention mainly comprises a sealing shell, a protective shell, a position transmission device, a rotary transformer and a magnetic transmission element. The present invention is installed on a valve actuator, directly connected to the valve stem to collect position information, and realizes real-time detection of the full position of the valve. Through non-contact motion transmission of the magnetic transmission element, the main body of the device and the valve pressure medium are isolated from each other, reducing the risk of leakage. The insulating layer of the rotary transformer coil is made of polyimide material, which improves the performance of high temperature and nuclear radiation resistance. The present invention can realize real-time acquisition of valve position within the full stroke, with high detection accuracy, and has the advantages of high pressure resistance, no influence of the medium in the valve, high temperature resistance, nuclear radiation resistance, compact structure, simple and reliable.

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