Multi-function suction gun for leak detection with self-wrapping probe and adjustable inlet pressure

Abstract

The invention discloses a multi-function suction gun for leak detection with a self-wrapping probe and adjustable inlet pressure, which comprises a suction gun body, a suction gun rod, an adjustable flow valve, a suction gun hose, a suction gun handle, a probe control mechanism and a self-wrapping probe. The suction gun is characterized in that the self-wrapping probe realizes coating and leak detection of the point to be detected by a probe control mechanism located in front of the suction gun handle, the adjustable flow valve precisely adjusts the inlet pressure of the suction gun by rotating an adjustment knob with scale. According to the multi-function suction gun for the leak detection with the self-wrapping probe and adjustable inlet pressure, a single point leak test can be conveniently and quickly perform on a solder joint, the risk of operation error and unnecessary material control are avoided, the precise control of the inlet pressure of the suction gun is realized, and therisk that atmosphere suddenly enters the leak detector and damages the instrument due to a blind operation causing excessive force is avoided.

Description

technical field [0001] The invention belongs to the technical field of helium mass spectrometer leak detection in non-destructive testing, and is mainly applied to single-point leak detection of solder joints and screw joints in spacecraft propulsion pipelines. Background technique [0002] At present, the single-point leak detection of spacecraft propulsion pipeline is the main test item of leak detection work, including the leak detection of welding points and screw joints of pipelines. Leak detection currently mainly uses the helium mass spectrometer sniffing gun leak detection method. Its working principle and method are as follows: use special tape to cover the single points to be inspected one by one in 360 degrees to form a relatively airtight cavity. The probe is inserted into the cavity, and the helium component leaked from the single point to be tested will be sucked into the mass spectrometer chamber of the leak detector along the sniffer hose, and the helium reac...

AI Technical Summary

Problems solved by technology

[0003] The spacecraft propulsion pipeline has a large number of welding points, usually 200 to 300 or more, and the workload is heavy; the pipeline itself has Four specifications, the thinner the pipe diameter, the more difficult it is to cover, and the worse the operability; the pipeline direction is complicated, and some even close to the pipeline mixed with many extremely small temperature control cables or valve equipment, the space is small, and the operation is difficult; After the leak detection is completed, the covering tooling must be removed one by one, which brings great risks to the control of excess on the star

[0004] In addition, there is an inlet pressure adjustment mechanism inside the tail end of the original leak detection sniffer gun. When the pressure needs to be adjusted, the tail end shell of the sniffer gun must be disassembled, and the hexagonal mechanism needs to be adjusted with a wrench

This structure and adjustment method are very unreliable. If you are not skilled in the operation, it will be easy to adjust too much so that a large amount of air suddenly enters the mass spectrometer chamber of the instrument and destroys the filament and damages the equipment.

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