FIELD: engineering.
SUBSTANCE: invention relates to engineering, in particular to pneumatic systems for checking the tightness of closed volumes by filling and discharging compressed gases with excessive pressure from the vessels. To check the tightness of the article, the pneumatic system, including the filter, installed on each inlet of the control gas supply to the pneumatic system, a line containing pressure monitoring devices, pressure regulators, valves, the overpressure protection device, wherein the line is connected to the vacuum pump and to the article, each inlet of the control gas supply to the pneumatic system is connected through the filter and the pneumatic valve to the reduction unit and is linked to the inlet of the automatic flow regulator of the reduction unit, and the outlet of the automatic flow regulator of the reduction unit is connected to the lines of the reduction unit, the number of which corresponds to the number of applied pressure ranges, each line including a first pneumatic valve of the reduction unit, a first automatic pressure sensor of the reduction unit, the first automatic pneumatic pressure regulator of the reduction unit, the second automatic pressure sensor of the reduction unit and the second pneumatic valve of the reduction unit, wherein, starting from the second line, the first automatic pneumatic pressure regulator of the reduction unit is connected to the section of the line, where the following elements are consecutively connected: the third automatic pressure sensor of the reduction unit, the third pneumatic valve of the reduction unit and the second automatic pneumatic pressure regulator of the reduction unit, repeating up to k-1 times, where k is the serial number of the line, each line of the reduction unit being connected to the corresponding line of the vacuum unit, including the first pneumatic valve of the vacuum unit, the first automatic pressure sensor of the vacuum unit and the second pneumatic valve of the vacuum unit connected to the vacuum pump through the second automatic pressure sensor of the vacuum unit, wherein the vacuum pump is provided with an exhaust fitting and an inlet fitting with a vacuum unit filter and the third pneumatic valve of the vacuum unit, further, the lines of the reduction unit and the vacuum unit are connected to the manifold lines, the number of manifolds corresponding to the number of the lines of the reduction unit, each manifold being provided with an overpressure protection device in the form of a drain line, and connection lines to the article, the number of which corresponds to the maximum number of inputs of control gas supply to the article, and on each connecting line to the article a pneumatic manifold valve is installed, a manifold pressure measuring device and a manifold fitting, connected to the article, connected through the control fitting with control lines, the number of which corresponds to the number of control fittings on the article, while all the elements of the pneumatic system are integrated into a network for data exchange by means of a computer. As well as the drain line of the pneumatic system is divided into sections for draining out the control gas.
EFFECT: technical result of the invention is the expansion of the range of filling and discharging pressures, while the automation of the pneumatic system allows eliminating the dependence on the human factor, and it is also possible to adjust and maintain a given rate of filling and discharging.
1 cl, 1 dwg
