A brief introduction of pneumatic actuators

pneumatic actuators (commonly known as pneumatic head is also called the pneumatic actuators English: Pneumatic physical) Actuators according to its energy form can be divided into pneumatic, electric and hydraulic three categories, each with characteristics, suitable for different occasions. Pneumatic actuators is a category of actuators.

abstract

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pneumatic actuators actuators and regulating mechanism is a unified whole, the actuator diaphragm, piston, fork type and gear rack type. Piston stroke length, suitable for a greater thrust required; The diaphragm stroke is small, can only be direct drive valve stem. Fork type pneumatic instruments have torque, the space is little, torque curve more accord with the valve torque curve etc, but not very beautiful; Commonly used on large torque of the valve. Gear rack type actuator has a simple structure, stable and reliable, and safe explosion-proof, etc, in power plant, chemical industry, oil refining, etc to higher safety requirements have wide application in production.

the working principle of

01 when 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.

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on the contrary, when the compressed air from the ends of the tube tip into the pneumatic actuators B, 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.

3

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.

actuators classification

1 actuators with

2 electric actuator

3 hydraulic actuators can also be divided into

1. Double-acting actuators

2. Single-acting actuator

the curve actuator

the product adopts 朂 new scientific research: curve in pneumatic motor as power components, different from general pneumatic actuator is a new type of cyclotron drive more. For manipulating gate valve, globe valve, butterfly valve, such as the opening and closing and opening adjustment, greatly reduce the labor intensity of the site operation workers, improve the labor efficiency. Can be widely used in oil refining, chemical industry, such as device that requires a high degree of automation, devices and other working condition is poor, inflammable and explosive environment.

keyword: pneumatic, actuator