6-Intelligent valve positioner for oil and gas
The intelligent valve positioner for TORLEO thin film regulating valve is widely used in the precise control of flow in the production process of petroleum, chemical, metallurgy, electric power, papermaking and other industries.
The technical principle of the TORLEO intelligent valve positioner is to use the principle of electric balance (digital balance) instead of the traditional force balance principle, and convert electric control commands into pneumatic positioning increments to realize valve position control; use digital open, stop, and close signals To drive the pneumatic actuator; the valve position feedback signal directly passes through the high-precision position sensor to realize the electric/pneumatic conversion function. The microprocessor in the intelligent valve positioner receives the 4-20mA set value signal and compares it with the actual valve position value fed back by the valve position sensor. If a deviation is detected, it immediately outputs an electronic control command according to the magnitude and direction of the deviation ( PWM digital method) to the I/P control unit of the nozzle baffle, and then adjust the air flow into the air chamber of the actuator, that is to say, the control valve converts the control command into a pneumatic displacement increment. When the actual valve position deviates greatly from the set value (high-speed zone), the positioner outputs a continuous signal; if the deviation is not large (low-speed zone), the positioner will output a pulse signal; when the deviation is small (adaptive or adjustable) Dead zone state), there is no positioner output. At this time, the actual valve position reaches the set value, and the mechanism reaches a balanced state, that is, a certain set current corresponds to a certain valve position
Yima Coal Industry Group Co., Ltd. is a large state-owned coal enterprise. It was formerly Yima Mining Bureau. It has more than 50,000 employees. As of the end of 2012, the total assets are more than 59 billion yuan. The mining area spans Henan, Qinghai, Xinjiang, Five provinces (regions) including Shanxi and Inner Mongolia have 16 production mines with a raw coal production capacity of more than 34 million tons. The coking coal, lean and lean coal, anthracite and clean coal produced are widely used in power generation, gas production, industrial boilers, coking and building materials In other industries, the products are widely sold in more than 20 provinces and regions in China. At the same time, it is also involved in manufacturing, power generation, cement, alumina, coal chemical industry and other fields. It has been successively rated as the most influential enterprise in Henan Province, the Party Committee of Advanced Enterprises in Henan Province, the Advanced Enterprise in Ideological and Political Work in Henan Province, the Meritorious Enterprise in Energy Conservation and Emission Reduction in China, and the Model Enterprise in China's Safety Culture, etc., and won the National May 1 Labor Award. Ranked 283th among the Top 500 Chinese Enterprises in 2012.
The electrical instrument branch of Zongneng Company of the group ordered a batch of TORLEO single-acting intelligent valve positioners in the purification section of Zongneng Company in October 2014 to replace the original Siemens valve positioner and solve the gas source of the original Siemens valve positioner. The problem of frequent failures caused by low quality meets the requirements of on-site production.
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