Method and device for displaying and controlling opening of electric butterfly valve
A technology of electric butterfly valve and controller, which is applied in the direction of transmission, belt/chain/gear, mechanical equipment, etc., to achieve the effect of convenient adjustment, saving maintenance cost and saving engineering cost
Inactive Publication Date: 2012-05-09
ELECTRON CO LTD
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Problems solved by technology
However, the traditional control method of the electric butterfly valve has a fatal shortcoming, that is, there is no position indication. When the valve is not in the limit position, the operator cannot understand the opening of the butterfly valve, and cannot realize 0-100% arbitrary opening control.
Not only bad for control, but also unable to realize computer system control
Method used
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[0019] The 18th section is to close the valve, and the functions of each signal are the same as the 17th section.
[0020] C1 in the 19th paragraph is a counter with the function of adding and subtracting counting. CU is the counting terminal. Once C1 is connected, it will start counting. In this design, when M33.0 is pressed on the screen, M33.4 (its function Under the control described later), it is switched on every 1 second, and C1 counts up once to realize the opening count of the valve opening. CD is the count-down terminal. Once C1 is connected, it will start counting down. In this design, when M33.1 is pressed on the screen, it will be connected every 1 second under the control of M34.4 (its function will be explained later). C1 counts down once to realize the closing count of the valve opening. , the S terminal is the initialization terminal. When its value changes from 0 to 1, the preset maximum count value of MW908 at the PV terminal is transferred to C1 (the maxim...
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The invention relates to a method and a device for displaying and controlling the opening of an electric butterfly valve by using a computer program. A control return circuit which comprises a programmable controller connected with a computer and a driving contactor of the electric butterfly valve is adopted. The method is characterized in that time from starting the electric butterfly valve to thoroughly opening the electric butterfly valve is used as a numerical value that the opening of the electric butterfly valve is 100 percent; time that the electric butterfly valve is opened or closed every time is compared with the time that the opening of the electric butterfly valve is 100 percent, the opening magnitude or the closing magnitude is calculated, and the opening percentage of the electric butterfly valve is obtained; and a counter is set to be zero when the electric butterfly valve is fully closed, which displays 0 percent of the opening. The invention does not require investment in software and hardware, only requires to skillfully use functions, such as the counter of STEP7 software, a passing block, a multiplication block, a division block, and the like to accurately control the opening of the electric butterfly valve instead of a performer, avoids operational errors, and can greatly save engineering cost and maintenance cost when being used in the performer and a system of the electric butterfly valve.
Description
technical field [0001] The invention relates to a control method of an electric butterfly valve, in particular to a method and a device for realizing the display control of the opening degree of the electric butterfly valve by using a computer program. Background technique [0002] A wide variety of electric butterfly valves are widely used in industrial production processes. Traditional electric butterfly valves use two contactors to control the forward and reverse rotation of the motor, and the motor drives the butterfly valve to open and close the valve. When the valve is turned to the fully open or fully closed position, the limit switch on the valve is touched, the limit switch cuts off the contactor, and the valve stops acting. This control method has a simple and reliable structure, low one-time investment, and is widely used in industrial production processes. However, the traditional control method of the electric butterfly valve has a fatal shortcoming, that is, ...
Claims
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IPC IPC(8): F16H37/00
Inventor 吴晓峰段方民郭永良陈铁军刘尊义赵健白如宾张弘弢
Owner ELECTRON CO LTD