DEVICE FOR AUTONOMOUS LEAK TEST BY EVACUATING THE BODY OF PRODUCTS Russian patent published in 2023 - IPC F17C5/00 G01M3/02 

FIELD: mechanical engineering.

SUBSTANCE: invention relates to pneumatic systems for checking the tightness of a compartment of products by body vacuuming by pumping air out of the product in automatic mode to an operating vacuum and equalizing the pressure in the product with atmospheric pressure in manual mode, and can be used in the process of manufacturing and repairing products. The invention comprises a vacuum pump connected through the first cock, a vacuum outlet hose and a second cock to the body of the product, which is connected to the first and second measuring pressure transducers controlled by the control circuit, whereas the second cock is provided with a fitting for connecting the product. Three power switches are additionally introduced into the control circuit, one of which is functionally emergency, and the other two are for turning on the timer and turning off the vacuum pump, respectively, two automatic switches, one of which is made with the functions of protecting power lines and the motor, and the other is for protection of the signal and control lines and devices, a magnetic contactor connected to the vacuum pump motor, four signalling indicators, one of which notifies of the supply of voltage, the other of the emergency shutdown, and the other two of the end of the set time countdown from the start of the time relay operation and turning on the vacuum pump, respectively, three time relays, whereas the valves are mechanical.

EFFECT: autonomy during operation, increased reliability during operation and speed.

1 cl, 2 dwg