Manual and electric switching mechanism for valve actuator
A driving device, electric switching technology, applied in the direction of valve device, valve operation/release device, engine components, etc., can solve the problems of heavy weight, large structure of switching mechanism, restrictions, etc., and achieve light weight, compact structure and low manufacturing cost low effect
Inactive Publication Date: 2013-08-14
中国能建集团装备有限公司南京技术中心
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Problems solved by technology
[0003] The purpose of the present invention is to provide a manual and electric switching mechanism for a valve driving device to solve the problem that the existing switching mechanism has the disadvantages of large structure and heavy weight, which are limited in industrial applications
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[0021] Preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0022] Such as figure 1 As shown, the present embodiment provides a manual and electric switching mechanism for a valve driving device, including a hand wheel 1, a bearing 18, an output shaft 17, a clutch 13, a worm wheel 11 and a switching device, and the hand wheel 1 passes through the bearing 18 The worm wheel 11 forms a rotational cooperation with the output shaft 17, and the clutch 13 and the output shaft 17 are both provided with a flower for the clutch 13 to slide axially along the output shaft 17 or to rotate synchronously with the output shaft 17. key, the axial ends of the clutch 13 are respectively provided with grasping claws for connecting the hand wheel 1 or the worm wheel 11, the output shaft 17 passes through the compression spring 14 in a compressed state, and the ends of the compression spring 14 Connect the clutch 13.
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The invention provides a manual and electric switching mechanism for a valve actuator. The manual and electric switching mechanism for the valve actuator comprises a hand wheel, a bearing, an output shaft, a clutch, a worm gear and a switching deice, wherein the hand wheel is in turning fit with the output shaft through the bearing, the worm gear is in turning fit with the output shaft, the clutch and the output shaft are both provided with splines which are used for enabling the clutch to slide along the output shaft axially and rotate with the output shaft synchronously, and grasping claws for being connected with the hand wheel or the worm gear are arranged at two axial ends of the clutch respectively. According to the manual and electric switching mechanism for the valve actuator, a switching handle is pulled upward so as to drive a sliding shaft, a flexible shaft and a pin shaft to move upward sequentially, a switching block rotates to push the clutch to move upward to be separated from the worm gear, an upright rod is kept upright on the end face of the worm gear under the effect of tension force of a tension spring, at the moment, the grasping claws of the clutch are meshed with the hand wheel, and the valve actuator is in a manual state. Compared with an existing switching mechanism, the manual and electric switching mechanism for the valve actuator has the advantages of being compact in structure, light in weight and low in manufacturing cost.
Description
technical field [0001] The invention relates to a manual and electric switching mechanism, in particular to a manual and electric switching mechanism for a valve driving device. Background technique [0002] The valve drive device is a very important field device in the industrial process control system. It has convenient energy access, simple installation and debugging, and is widely used in electric power, metallurgy, petroleum, chemical and other industrial sectors. The valve driving device is generally composed of a motor, a main transmission mechanism, a stroke control mechanism, a torque limiting mechanism, a hand wheel, a manual / electric switching mechanism, etc. According to the function, the manual / electric switching mechanism can be divided into three modes: full manual switching, fully automatic switching and semi-automatic switching. The full manual switching mechanism, that is, the mutual switching between manual and electric is completely completed manually...
Claims
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IPC IPC(8): F16K31/05
Inventor 徐志伟李常余于仿翟欢乐周青
Owner 中国能建集团装备有限公司南京技术中心