Electropneumatic valve positioner based on two-position-type limit switch
A valve positioner, limit switch technology, applied in valve details, valve device, valve operation/release device, etc., can solve problems such as reaction, inconvenient production operation, and inability to know whether the valve is fully open or completely closed, etc.
Active Publication Date: 2013-06-05
CHANGSHU HUAXIA INSTR
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Problems solved by technology
However, the position of the valve position of the existing electric valve positioner cannot be intuitively reflected on the electric valve positioner, and the operator cannot know whether the valve is fully opened or completely closed, which brings some inconvenience to the production operation
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Embodiment Construction
[0020] The present invention will be further described below in conjunction with the embodiments shown in the accompanying drawings.
[0021] Such as figure 1 As shown, the electric valve positioner based on the two-position limit switch is used to convert the electrical signal into pneumatic force and drive the valve 11 of the regulating valve 21 to generate displacement through the cylinder. 22 and is used to accept the circuit board 16 for processing and outputting the displacement signal, the displacement receiving part 23 electrically connected with the circuit board 16, the displacement output part 25 connected with the displacement receiving part 23 and the displacement receiving part 23 phase transmission Connect the feedback section 24.
[0022] Such as figure 2 As shown, the feedback part 24 includes an external feedback spring 4 connected to the displacement receiving part 23 at one end, a feedback lever 7 connected to the other end of the external feedbac...
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The invention relates to an electropneumatic valve positioner based on a two-position-type limit switch. The electropneumatic valve positioner comprises a machine shell, a displacement receiving part, a displacement output part and a feedback part. The feedback part comprises a first cam, a second cam, a third cam, a second trigger switch, a third trigger switch, a second indicator light and a third indicator light, wherein the second cam and the third cam are coaxial with the first cam and are arranged in parallel, the second trigger switch and the third trigger switch respectively correspond to the second cam and the third cam, the second indicator light is in electric connection with the second trigger switch, and the third indicator light is in electric connection with the third trigger switch. When a regulating valve is opened completely, the third cam is abutted against the third trigger switch, the third trigger switch is switched on, and the third indicator light is glowed; when the regulating valve is closed completely, the second cam is abutted against the second trigger switch, the second trigger switch is switched on, and the second indicator light is glowed. According to the second indicator light and the third indicator light, the states of valve switch can be reported in real time and in direct viewing.
Description
technical field [0001] The invention relates to an electric valve positioner based on a two-position limit switch. [0002] Background technique [0003] The electric valve positioner is the main accessory of the regulating valve. It is usually used in conjunction with the pneumatic regulating valve. It receives the output signal of the regulator, and then uses its output signal to control the pneumatic regulating valve. When the regulating valve operates, the displacement of the valve passes through The mechanical device is fed back to the valve positioner, and the valve position status is transmitted to the upper system through electrical signals, and the valve position reaches the specified position through multiple feedbacks. However, the position of the valve position of the existing electric valve positioner cannot be intuitively reflected on the electric valve positioner, and the operator cannot know whether the valve is fully opened or fully closed, which brin...
Claims
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IPC IPC(8): F16K37/00F16K31/12
Inventor 马乐成孙燕飞
Owner CHANGSHU HUAXIA INSTR