Filling-discharging drift tube seal air nozzle

Abstract

The invention belongs to the technical field of drift tube sealing, in particular to a filling-discharging drift tube seal air nozzle, which comprises a cylindrical air nozzle shell with a cavity inside. One end of the air nozzle shell is provided with an oblate matching end face, the other end is provided with an opening communicated with the cavity, the center of the matching end face is provided with a through hole, and the cavity and the through hole are communicated through an air flow hole; a cylindrical ejector pin fixing seat is arranged in the cavity, the top end of the ejector pin fixing seat is close to the air flow hole, and the tail end of the ejector pin fixing seat is close to the opening; an ejector pin connected with a spring is arranged in the ejector pin fixing seat, thetop end of the ejector pin is close to the air flow hole and is provided with a chassis, when the tail end of the ejector pin is not stressed, the chassis is tightly pressed on the top end of the ejector pin fixing seat under the action of the spring to form a seal; and when the tail end of the ejector pin is pushed in the direction of the air flow hole, the chassis is out of contact with the topend of the ejector pin fixing seat, and a passage capable of passing through the air flow is formed between the chassis and the top end of the ejector pin fixing seat.

Description

technical field [0001] The invention belongs to the technical field of drift tube sealing, in particular to an inflatable and deflated drift tube sealing gas nozzle. Background technique [0002] At present, nuclear terrorism and nuclear material smuggling have become the biggest challenge to international security. As the international anti-terrorism situation becomes more and more serious, all major economic countries have stepped up their efforts to combat terrorist forces. On the one hand, the nuclear-related units and customs of relevant countries are strengthening the monitoring and management of nuclear material production, storage and transportation; Smuggling and illegal transport. [0003] Radiation imaging of nuclear materials is an important means of nuclear material detection, but the limited ability to penetrate dense matter and artificially increased radiation doses make x-ray, γ-ray and neutron imaging techniques encounter great difficulties in detecting nuc...

AI Technical Summary

Problems solved by technology

[0006] This completely sealed drift tube detector has several problems: first, as the working time increases, the leakage of gas in the tube cannot be monitored. It cannot be measured, that is to say, if the pressure of the tube decreases and the performance decreases, the entire tube can only be discarded; second, the working gas in the tube has a certain life span, and exceeding a certain working time will affect the test performance, but because the tube After fully sealed, it is impossible to replace the gas

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