Smoke-fire actuating cylinder for nuclear power safety valve and laser welding method thereof

Abstract

The invention provides a smoke-fire actuating cylinder for a nuclear power safety valve and a laser welding method thereof. The input end of a shell is provided with at least one joint for installing an igniter; the bottom part of the joint is a countersunk laser welding plane with a central through hole; an input cover piece is welded at one side of the input end of the countersunk laser welding plane; the igniter is arranged at the outer side of the input cover piece; the inner part of the shell is a cylindrical cavity with an opening at one end; a high-temperature-resistant propelling agent is filled in the cavity; a laser welding plane being 1mm in depth is processed at the output end of the cavity; and an output cover piece is welded on the laser welding plane. The smoke-fire actuating cylinder provided by the invention is applicable to being used for a nuclear power unit, can resist the environment with long-time high temperature, high humidity and irradiation and can be used as a power source of the nuclear power safety device. The smoke-fire actuating cylinder provided by the invention has the advantages of simple process, safe operation, good sealing property and environmental adaptability and the like.

Description

technical field [0001] The invention belongs to the technical field of pyrotechnics, and relates to a pyrotechnic working element, in particular to a pyrotechnic actuator for a nuclear power safety valve and a laser welding process thereof. Background technique [0002] my country is one of the few countries in the world with a relatively complete nuclear industry system. Over the years, my country's nuclear power industry has grown from scratch and has achieved great development. The pressurized water reactor nuclear power unit is the third-generation nuclear power technology. Through the unique passive safety system design, the design of the nuclear power unit is simpler, and the safety and reliability of the nuclear power plant are higher. It is the mainstream nuclear power unit that my country is vigorously developing at present. [0003] The blasting valve is the key equipment of the PWR nuclear power unit, and the pyrotechnic actuator is the power source of the blastin...

AI Technical Summary

Problems solved by technology

The problems existing in the existing structural packaging process are: the glass sealing process is difficult to achieve matching sealing, and the process is complicated and polluted

The output end and the sealant coating process have problems such as long-term storage aging, low temperature embrittlement, and poor mechanical and environmental performance such as shock and vibration

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