Actuating mechanism anti-rotation structure of regulating valve
An actuator and pneumatic actuator technology, applied in the valve shell structure, valve operation/release device, valve details, etc., can solve the problems of positioner control failure, regulating valve can not work, regulating valve locking is not tight, etc. The effect of preventing loosening
Active Publication Date: 2021-04-09
JIANGSU LANGETE AUTOMATION EQUIP CO LTD
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Problems solved by technology
[0002] For large-diameter regulating valves, especially cage sleeve valves, when the fluid flow rate is high and the pressure difference is large, the valve plug can easily drive the valve stem to rotate together under the force of the fluid. If the split nut (without anti-rotation function), the push rod of the actuator will also rotate with the valve stem, which will cause the control of the positioner to fail (damage to the actuator), and eventually cause the regulating valve to fail to work.
The anti-rotation structure of the existing regulating valve is mostly a self-locking structure in the pneumatic device or electric device. Since there is no external force to act on the valve stem of the regulating valve, it will cause irreversible damage to the self-locking structure for a long time. Damage, and will cause the locking position of the self-locking structure to shift, so that the regulating valve cannot be locked tightly in the valve body
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[0021] The accompanying drawings are for illustrative purposes only, and should not be construed as limitations on this patent; in order to better illustrate this embodiment, certain components in the accompanying drawings will be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art It is understandable that some well-known structures and descriptions thereof may be omitted in the drawings.
[0022] As shown in the figure: an anti-rotation structure of the actuator of a regulating valve, including a pneumatic actuator 1, an actuator bracket 4, a valve cover 6 and a valve body 3, and the pneumatic actuator 1 is set on the top of the actuator bracket 4 , the lower part of the actuator bracket 4 is connected with the valve cover 6, the lower part of the valve cover 6 is connected with the valve body 3, the pneumatic actuator 1 is connected with the valve stem, and the valve stem passes through the actuator The bracket 4 i...
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An actuating mechanism anti-rotation structure of a regulating valve comprises a pneumatic actuating mechanism, an actuator support, a valve cover and a valve body, wherein the pneumatic actuating mechanism is arranged at the top end of the actuator support, the lower portion of the actuator support is connected with the valve cover, the lower portion of the valve cover is connected with the valve body, the pneumatic actuating mechanism is connected with a valve rod, and the valve rod penetrates through the actuator support to be connected with the valve cover; and a first anti-rotation mechanism and a second anti-rotation mechanism are arranged in the actuator support. According to the actuating mechanism anti-rotation structure, anti-rotation of the valve rod in the regulating valve is achieved through the first anti-rotation mechanism and the second anti-rotation mechanism, and the valve rod is protected while the valve rod is prevented from rotating through the friction force between a second silica gel non-slip mat and the valve rod and the friction force between a first silica gel non-slip mat and the valve rod.
Description
technical field [0001] The invention relates to the technical field of regulating valves, in particular to an anti-rotation structure of an actuator of a regulating valve. Background technique [0002] For large-diameter regulating valves, especially cage sleeve valves, when the fluid flow rate is high and the pressure difference is large, the valve plug can easily drive the valve stem to rotate together under the force of the fluid. If the split nut (without anti-rotation function), the push rod of the actuator will also rotate with the valve stem, which will cause the control of the positioner to fail (damage to the actuator), and eventually cause the regulating valve to fail to work. The anti-rotation structure of the existing regulating valve is mostly a self-locking structure in the pneumatic device or electric device. Since there is no external force to act on the valve stem of the regulating valve, it will cause irreversible damage to the self-locking structure for a ...
Claims
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Login to View More IPC IPC(8): F16K31/12F16K27/00F16K31/60
CPCF16K27/00F16K31/12F16K31/60
Inventor 李朝磊郭小兵王磊王丽娟张明
Owner JIANGSU LANGETE AUTOMATION EQUIP CO LTD