This system is mainly used for dry leak detection of power SF6 pole switches. Large leaks are detected by vacuuming and maintaining pressure on the workpiece and vacuum box simultaneously, filling the tested workpiece with helium after being qualified, and judging whether there is a slight leak through the helium mass spectrometer leak detector, and recovering the helium in the tested workpiece after being qualified Recycle, and finally fill the workpiece with SF6 gas. If a slight leak in the workpiece is detected, it needs to be transferred to a fixed point and then leaked. 　　The helium leak detection equipment has an automatic roller line, which is connected to the user's unpowered production line, and can automatically transport the workpieces into and out of the vacuum box of the helium leak detection equipment to the side-out fixed-point waiting station. 　　 If the workpiece is confirmed qualified by the helium leak detection equipment, the equipment can display and save various parameters of the operation process and test, and the workpiece can be automatically sent back to the production line after the leak detection and inflation are completed. If the workpiece is leaked through detection, the equipment can accurately determine the leak rate of the workpiece, automatically fill it with helium, and then send it to the production line, and then send it to the leak detection station through the production line. The leak detector is used to sniffer the leak. Determination. 　　 performance characteristics: 　　1) Two-station configuration detects one piece per box; 　　2) The pressure difference between the inside and outside of the workpiece: ≦0.03Mpa (settable) 　　3) Leak detection accuracy: ≦0.5%/year leak rate 　　4) SF6 gas pressure: 0.035Mpa (gauge pressure) 　　5) Helium filling pressure: 0.03Mpa (absolute pressure) 　　6) Helium recovery rate: ≧98% 　　7) Leak detection cycle: ≦7 minutes/piece 　　8) Automatic clamping, especially suitable for assembly line operation; 　　9) Barcode scanning, data storage and query functions;