Fluorine lined DC globe valve manufacturer discusses renovation plan for high-temperature gate valve control system

Fluorine lined DC globe valve Manufacturer's plan for the renovation of high-temperature gate valve control system

Manually close the three air brake valves to zero position on site, hold a stopwatch, and open them check valve The gate valve is placed in the fully open position and tested several times, first fully open fully closed, and then fully closed fully open. The actual measurement shows that the time required for a single stroke is 47 seconds.

Firstly, create a selection button on the operation (WINCC) screen, and then create an analog quantity setting and feedback display, defining it as two analog quantities. Place the selection button and analog quantity setting and feedback display next to the gate valve on the kiln tail system main control screen. The selection button is to preserve the original design program, and its value is assigned to a Boolean variable, which is a clamp type variable Fluorine-lined Butterfly Valve Click the selection button. When the button is gray, it means that the operation will be executed according to the original design program, and manual inspection is required to confirm the position of the gate valve; When the selection button is green, it indicates that the operation will be executed according to the modified program. The start and stop control part of the forward and reverse motors in the original three air high-temperature gate valve group window is displayed in gray and cannot be clicked to prevent operator misoperation. The kiln operator can know the position of the gate valve based on the analog values on the operating interface.

Secondly, programming the PLC program on SETP7 requires comparing the given value with the current feedback value when assigning a value to the analog quantity, PTFE lined valve The difference value is obtained by dividing the value by 100 (with valve opening ranging from 0 to 100%), multiplying it by the single stroke cycle time (47s), rounding the product to obtain the motor operating time; Compare the feedback amount with the given value. When the feedback amount is greater than the given amount (before the closing limit is reached), it indicates that the gate valve opening should be reduced. Conversely, when the feedback amount is less than the given amount (before the opening limit is reached), it indicates that the gate valve opening should be increased; When the two values are equal, a pulse signal is sent to stop the motor. At this time, the given numerical value is assigned to the feedback quantity, indicating that the third air brake valve switch is in place.

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