The working principle of pneumatic actuators and basic composition is what?

Working principle and basic composition of pneumatic actuators. < br / >
how it works: < br / >
when the compressed air from A tube tip into the pneumatic actuators, push double piston in gas (on both ends Cylinder head side) Linear motion, the piston rack drive gear on the axis of rotation on the 90 degrees counterclockwise rotation, the valve is open. The pneumatic valve at the ends of the gas tube tip discharge with B. Conversely, when the compressed air from B officer tip into the ends of the pneumatic actuators, gas drive double plug to the middle line movement, the rack on the piston driven gears rotate 90 degrees clockwise on the axis of rotation, the valve is closed. The pneumatic actuator with A pipe in the middle of the gas nozzle. The above for standard transmission principle. Pneumatic actuators can be device according to user requirements, in contrast to the standard transmission principle, namely choose standard shaft rotate clockwise to open valve, counterclockwise rotation to close the valve. The single function ( Spring return type) Pneumatic actuator tube tip for air inlet, A tube to vent (B B pipe nozzle should be installed muffler) 。 When A pipe nozzle inlet to open valve, expired on close valve spring force.

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basic composition < br / >
the regulating mechanism of species and structure of pneumatic actuators is roughly same, mainly actuators are different. So when the pneumatic actuators is introduced is divided into two parts of the actuator and control valve. Pneumatic actuators by actuator and control valve ( Regulatory agencies) The two parts. According to the size of the control signal, generate the corresponding thrust, promote regulator action. Regulating valve is to adjust part of the pneumatic actuators, in under the action of thrust actuator, valve produce certain displacement or corner, regulating the flow of fluid directly. < br / >
1, the pneumatic device is mainly composed of cylinder, piston, gear shaft, end cover, seals, screws, etc; Complete sets of pneumatic device should also include the opening instructions, limit, solenoid valve, locator, pneumatic components, manual institutions, and signal feedback etc parts. < br / >
2, pneumatic device connected to the valve size should meet with ISO5211 ( At the bottom) , GB/T12222 and GB/T12223 rules. < br / >
3, with manual mechanism of pneumatic device, the gas source is interrupted, should use pneumatic ball valve opening and closing operation, manual mechanism for the handwheel, should the handwheel or handle counterclockwise for valve open, clockwise for the valve to close. < br / >
4, piston rod end for internal and external thread, should be over the spanner wrench. < br / >
5, the piston sealing ring should be easy to replace and maintenance. < br / >
6, with buffer mechanism of pneumatic device, the stroke length of the buffering mechanism can be reference to the provisions of the table 1. < br / >
7, with adjustable buffering mechanism of pneumatic device, shall have the external cylinder body adjust the institutions of the cushion. < br / >
8, in and out of the air cylinder thread sizes should be consistent with MANUR NORM ( Attachment standard) sypv, GB / T7306。 1 GB / T7306。 2 and the provisions of GB/T7307. < br / >
keyword: pneumatic actuator < br / >