Intelligent valve positioner

Abstract

The invention relates to an intelligent valve positioner. A copper waterproof connector and a silencer are arranged outside a box body, while a transducing plate, a connecting plate, a cartridge valve and an insert block are arranged in the box body; a plug block is arranged below the connecting plate, and a main board is arranged above the connecting plate; a protection cover is arranged above the main board; a valve plate is arranged on one side of the cartridge valve and has a valve port; and a linear displacement sensor is arranged on a pneumatic actuating mechanism out of the box body and connected with the copper waterproof connector by a lead. The intelligent valve positioner has a simple structure, rational design, low energy consumption and high control precision, can conduct functions of valve position alarm, fault alarm and self-diagnosis, can be switched manually and automatically, has 'gas, power supply and signal interruption' protection functions, works stably in severe spot environments and has a wide application range.

Description

technical field [0001] The invention belongs to an intelligent valve positioner, in particular to an intelligent valve positioner applied to automatically adjust and control the stroke of a pneumatic actuator and the opening of a damper and a valve. Background technique [0002] At present, the core components of known intelligent valve positioners generally adopt proportional valves and nozzle baffle balance valves. Proportional valves generally include a main valve body and a pilot valve. The spool inside the pilot valve is made with a certain taper, and then the instantaneous flow is controlled by an integrated displacement monitoring device and a driving device to achieve the purpose of indirectly controlling the flow of the main valve. Its structure is complicated, its processing precision is high, its production cost is high, its price is high, and its application environment is relatively harsh; the nozzle baffle type balance valve adopts a mechanical torque balance m...

AI Technical Summary

Problems solved by technology

Proportional valves generally include a main valve body and a pilot valve. The spool inside the pilot valve is made with a certain taper, and then the instantaneous flow is controlled by an integrated displacement monitoring device and a driving device to achieve the purpose of indirectly controlling the flow of the main valve. Its structure is complicated, the processing precision is high, the production cost is high, the price is expensive, and its application environment is relatively harsh; the nozzle baffle type balance valve adopts a mechanical torque balance mechanism, the number of mechanical parts is large, and it is inconvenient to repair and maintain

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