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With the process of industrial automation, the intelligence of pneumatic valves has been slowly popularized into pipeline control in various industries, and the intelligence is mainly reflected in the pneumatic valves equipped with intelligent valve positioners, and the valve switches and precise flow adjustment are controlled through computer programs. Intelligence is manifested in the following aspects:
Industrial Automation - Intelligent Valve Positioner Popularization Reasons:
1. The pneumatic valve has its own fault diagnosis function, which can diagnose whether the valve flow adjustment is accurate and whether the signal is fed back in place; Intelligent functions such as remote communication for diagnosing operating status and valve position adjustment make pneumatic valve management more convenient, fault diagnosis easy, and reduce the skill requirements of maintenance personnel.
2. The use of pneumatic valves can reduce the product type of the production line, and the whole pneumatic valve is intelligently controlled. The pneumatic valve is equipped with an intelligent valve positioner, which can not only easily change the flow characteristics of the pneumatic valve, but also improve the control quality of the control system. As a result, the requirements for the flow characteristics of pneumatic valves can be simplified and standardized (e.g., line-specific pneumatic control valves only). The intelligent function module is used to match the characteristics of the controlled object, so that the type and variety of pneumatic valve products are greatly reduced, and the manufacturing process of pneumatic valve is simplified. In order to reduce the variety of pneumatic valves, there are also domestic manufacturers to produce full-function pneumatic valves, these intelligent methods will continue to improve, and in the production and market to withstand the test and recognition.
3. Digital communication of pneumatic valves. Digital communication will be widely used in pneumatic valves, based on the HART communication protocol, the valve positioner of some pneumatic valves will realize the input signal and the valve position signal on the same transmission line; Based on the fieldbus technology, the pneumatic valve is combined with the valve positioner and PID control function module, so that the control function can be realized at the field level, so that the danger is dispersed, and the control is more timely and faster.
4. Intelligent valve positioner is also called intelligent valve controller. The intelligent valve positioner has all the functions of the valve positioner, and can improve the dynamic and static characteristics of the pneumatic valve, and improve the control accuracy of the pneumatic valve, so the intelligent valve positioner will become an important pneumatic valve auxiliary equipment in the future and be widely used.
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