Helium mass spectrometer leak detector suction gun for spacecraft leak detection

Abstract

The invention discloses a helium mass spectrometer leak detector suction gun for spacecraft leak detection. The helium mass spectrometer leak detector suction gun comprises an external structure and an internal structure. The external structure comprises a medical needle, a suction gun rod, a front cavity chamber, a middle cavity chamber, a rear cavity chamber, a suction gun handle and a flexible pipe which are mechanically connected and arranged in turn. The suction gun handle is arranged below the three cavity chambers. The flexible pipe is arranged on the lower end of the handle and used for being connected with a leak detector. The internal structure comprises sealing rubber rings, a filtering sheet, a cylinder with a hole and a conical head, a connecting rod and a pressure regulating column which are arranged in turn. The rear end of the suction gun rod and an air outlet end of the front cavity chamber are respectively provided with the sealing rubber rings and the filtering sheet. The two sealing rings are used for sealing the internal structure and the external structure of the suction gun. Pressure or flow of air entering into the leak detector is regulated via distance between the hole and the conical head. The conical cylinder and the pressure regulating column are connected by the connecting rod. The suction gun is applicable to helium mass spectrometer leak detectors with different models, and pressure of leak detection openings of the leak detectors can be controlled within a range from being greater than a dozen Pa to several hundred Pa so that test of the leak detectors with various models is facilitated, response speed in the detection test can be effectively improved and leak detection efficiency is enhanced.

Description

technical field [0001] The invention belongs to the technical field of spacecraft leak detection. Specifically, the invention relates to a suction gun for a helium mass spectrometer leak detector used in the single-point leak detection process of a spacecraft. Background technique [0002] At present, my country's spacecraft will fill the sealed container or pipeline with a certain pressure or certain concentration of helium before single-point leak detection, and then use a suction gun to sniff the sealing part. The single-point leak detection of the spacecraft is mainly to detect the leaks of the screw joints of the pipeline, the weld of the pipeline and the sealing position of some equipment. Due to the complex mechanical seal structure and piping system of the spacecraft, it is difficult for the leak detection suction gun that comes with the leak detector to meet the single-point leak detection work. [0003] Usually, the sniffer gun that comes with the leak detector is...

AI Technical Summary

Problems solved by technology

The sniffing gun can conveniently and quickly test the single-point leak rate at different positions of the spacecraft, and it can well solve the problems of pressure adjustment at the leak detection port, the unique leak detection method of the spacecraft, and the inconvenient operation of the traditional sniffing gun.

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