SU1497398A2 - Pneumatic control system - Google Patents

Abstract

The invention is intended to automatically control the operation of several air cylinders. The purpose of the invention is to increase the safety of work and the performance of controlled equipment. The pneumatic system comprises a cycle interceptor valve 10, normally open valves 8 and 9 and normally closed valve 11 with cavities 39, 40 and 41 controls, respectively, which are connected to the outlet of the valve 10. The valve outlet 8 is connected to the valve inlet 3, the valve inlet 9 communicates with the release of the valve 20 time delay, the outputs of the valves 9 and 11 - with a large cavity 45 of the control valve 12. This ensures the safe operation of the staff during the testing of products for tightness in a liquid. 1 il.

Description

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The invention relates to pneumatic systems, is intended to automatically control the operation of several pneumatic cylinders, and is additional to the basic author. St. No. 1372111.

The purpose of the invention is to increase the safety of work and the performance of controlled equipment.

The drawing shows a schematic diagram of a pneumatic control system. The control system contains control valves 1 and 2, auxiliary valve 3, first reversing valve 4, throttle 5, adjustable air capacity 6, valve 7, 9, 9 first and second normally open valves. 10 cycle interruptions, normally closed valve 11, second reversing valve 12, normally open valve 13 for releasing high pressure air, normally closed valve 14 for releasing a high pressure air, pressure indicators 15-18, the valves 19, 20, 21, holding time, pressure gauges 22 and 23, pnevmotsi10

valve 13 and closes it, into the cavity 43 of the control of the normally closed valve 14 and opens it into the working cavity 36 of the pneumatic cylinder 25 and lifts the container 27 from vo5 to the upper position (according to the drawing) and turns on the indicator 17, notifying of the beginning of the test. When raising the tank 27 to the upper position, water from it through the pipeline 9 flows into the tank 28, flooding the product 26 to the required level. At the same time, compressed air is supplied to the test product 26 and the pressure gauge 22. The duration of the leak test of the product 26 is set by setting the time delay valve 20, after which the compressed air flows through the valve 20, the valve 9 into the cavity 45 of the distributor 12 and switches it. From the distributor 12, air enters the cavity 35 of the pneumatic cylinder 25, lowering the tank 27, while water from the tank 28 through the pipeline 29 flows into the tank 27. The valves 13, 14 return to their original position, and the indicator 17 turns off.

After actuating valve 21, hold 20

lindra 24 and 25, the test article 26, with the time-25 switch valve 7

bone 27 with liquid, capacity 28 for test article 26, flexible pipe 29, collector 30 of a low-pressure compressed air network. The working cavities 31 and 32 of the pneumatic cylinder 24 are formed by a piston 33 with a rod 34. The working cavities 35 and 36 of the pneumatic cylinder 25 are formed by a piston 37 with a rod 38. Valves 8, 9, 11, 13, 14 have cavities 39, 40, 41, 42, 43 controls. The distributors 4 and 12 have large control cavities 44 and 45 and small control cavities 46 and 47.

The system works as follows.

When switching the distributor 1 and 2, the compressed air from the network switches the distributor 3 and 4. At the same time, the compressed air through the throttle 5 from the distributor 3 enters the adjustable air capacity 6 and begins to fill it (during the filling time the distributors 1 and 2 must be kept by the operator in the on position ). From the distributor 4 compressed air

and compressed air from the pneumatic capacitance 6 enters the atmosphere. The distributor 4 switches to the initial position, the indicator 15 goes out. The cycle is over.

For emergency release of compressed air from test article 26, valve 10 connects cavities 39 and 40 of valves 8 and 9 to a network of compressed air, valve 11 opens and valve 12 switches, compressed air goes to atmosphere through valve 3, and position.

Claims (1)

Invention Formula Pneumatic control system dp aut. St. No. 1372111, characterized in that, in order to increase the safety of work and the performance of controlled equipment, it is equipped with a cycle interrupt distributor, two normally open and one normally closed valve enters the cavity 31 of the pneumatic cylinder 24 45 with control cavities. and moving its rod 24, at the end of the stroke, fixing and sealing the tested product 26. After a predetermined time at a certain pressure value in the pneumatic container 6, the pneumatic control of all valves is connected to the output of the cycle dispenser, the output of the first normally open valve is connected to the auxiliary valve. the input of the second is normal the control cavities of all valves communicate with the output of the cycle interrupt distributor, the output of the first normally open valve communicates with the input of the auxiliary valve, the input of the second is normal The pressure gauge 15, after which the operator 50 of the open valve communicates with the outlet of the second, may not keep the valves 1 and 2 in the on position. Compressed air through the valve 4 is supplied to the valve 19 time delay, which after some time switches the valve 12, and the compressed air enters the cavity 42 of the control normally open 55 The delay time valve, the output of the second normally open valve communicates with the larger control cavity of the second reversing valve, and the output of the normally closed valve communicates with the large control cavity of the second reversing valve. valve 13 and closes it, into the cavity 43 of the control of the normally closed valve 14 and opens it into the working cavity 36 of the pneumatic cylinder 25 and raises the container 27 from the water to the upper position (according to the drawing) and turns on the indicator 17, notifying of the beginning of the test. When raising the tank 27 to the upper position, water from it through the pipeline 9 flows into the tank 28, flooding the product 26 to the required level. At the same time, compressed air is supplied to the test product 26 and the pressure gauge 22. The duration of the leak test of the product 26 is set by setting the valve 20 time delay, after which the compressed air flows through the valve 20, the valve 9 into the cavity 45 of the distributor 12 and switches it. From the distributor 12, air enters the cavity 35 of the pneumatic cylinder 25, lowering the tank 27, while water from the tank 28 through the pipeline 29 flows into the tank 27. The valves 13, 14 return to their original position, and the indicator 17 turns off. After actuation of the valve 21 soak  time switch valve 7 and compressed air from the pneumatic capacitance 6 enters the atmosphere. The distributor 4 switches to the initial position, the indicator 15 goes out. The cycle is over. For emergency release of compressed air from the test article 26, the valve 10 connects the cavities 39 and 40 of valves 8 and 9 to the compressed air network, the valve 11 opens and switches the valve 12, the compressed air exits the atmosphere through valve 3, and the system returns to its original position. Invention Formula Pneumatic control system auth. St. No. 1372111, characterized in that, in order to increase safety of operation and performance of controlled equipment, it is equipped with a cycle interrupt distributor, two normally open and one normally closed valve of the control loop of all valves, the output of the first normally open valve is reported with auxiliary distributor input, the second input is normal open valve communicates with the output of the 50 open valve communicates with the output of the second 55 The delay time valve, the output of the second normally open valve communicates with the larger control cavity of the second reversing valve, and the output of the normally closed valve communicates with the large control cavity of the second reversing valve.