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manipulator

A technology of manipulators and gear parts, applied in the field of manipulators, can solve problems such as loss of driving motor holding force, valve core opening and closing, and inability to maintain the opening of the regulating valve, so as to achieve the effect of preventing opening and closing

Active Publication Date: 2019-07-30
YAMATAKE HONEYWELL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Generally, in rotary control valves such as butterfly valves, the spool of the control valve may open and close due to the force of the controlled fluid.
For example, in the case of an electric actuator, if the power supply to the actuator is cut off due to a power outage in the factory, etc., the holding force of the drive motor inside the actuator will be lost, and the adjustment may not be maintained. valve opening

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0054] figure 1 It is a sectional perspective view showing main parts of the manipulator according to the first embodiment.

[0055] figure 1 The manipulator 100 of Embodiment 1 shown is a device for operating a control valve used for process control of a flow rate in a factory or the like, and the valve shaft of the control valve is operated based on an operation signal supplied from an external positioner, This controls the valve opening of the regulating valve. For example, the operator 100 is an electric actuator for operating a rotary regulating valve such as a butterfly valve.

[0056]The manipulator 100 of Embodiment 1 has a singular planetary gear mechanism as a power transmission mechanism for operating the valve shaft of the regulator valve, and has a self-locking function that prevents the valve shaft from moving even when power is not supplied to the electric motor. In addition, the manipulator 100 has a function of manually operating the valve shaft and fixing ...

Embodiment approach 2

[0115] Figure 12 It is a sectional view showing main parts of the manipulator according to the second embodiment.

[0116] The manipulator 101 of the second embodiment differs from the manipulator 100 of the first embodiment in that a friction member 43 is provided between the first gear part 41 and the second gear part 42 , and is the same as the manipulator 100 of the first embodiment in other respects. In addition, among the components of the manipulator 101 according to the second embodiment, the same components as those of the manipulator 100 according to the first embodiment are given the same reference numerals, and detailed description thereof will be omitted.

[0117] Such as Figure 12 As shown, the planetary gear 14 further includes a friction member 43, the friction member 43 connects the first gear part 41 and the second gear part 42, and generates friction force on the contact surface with the first gear part 41 and the second gear part 42. . Next, use Figu...

Embodiment approach 3

[0127] Figure 17 It is a sectional perspective view showing main parts of the manipulator according to the third embodiment.

[0128] Figure 17 The manipulator 102 of the third embodiment shown differs from the manipulator 100 of the first embodiment in that the cut-off restriction of the planetary gear 24 is realized by magnetic force instead of frictional force, and is the same as the manipulator 100 of the first embodiment in other respects.

[0129] In addition, among the constituent elements of the manipulator 102 according to the third embodiment, the same constituent elements as those of the manipulator 100 according to the first embodiment are given the same reference numerals, and detailed description thereof will be omitted.

[0130] Figure 18 It is a plan view showing main parts of the manipulator according to the third embodiment.

[0131] Figure 19 It is a sectional view showing main parts of the manipulator according to the third embodiment.

[0132] exi...

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PUM

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Abstract

The invention provides an operator with a singular planetary gear mechanism whose gears are not easily damaged. The operator (100) of the present invention is used to operate the valve shaft of the regulating valve, and it is characterized in that it includes: a sun gear (3), which receives the rotational force of the drive motor and rotates; a fixed internal gear (5), which surrounds the sun gear The shape of the gear is fixed, and there are gear teeth on its inner peripheral surface; a plurality of planetary gears (4, 14, 24, 34), which are arranged between the sun gear and the fixed internal gear, mesh with the sun gear and the fixed internal gear, The sun gear rotates while revolving around the sun gear; the movable internal gear (6) is arranged coaxially with the fixed internal gear, has gear teeth meshing with planetary gears on its inner peripheral surface, and is set to be rotatable; and the output shaft, It is connected with the movable internal gear to rotate the valve shaft of the regulating valve, and the planetary gear has a torque limiting structure that limits power transmission when a certain amount of torque is applied in the direction of rotation.

Description

technical field [0001] The present invention relates to an operator for operating a valve shaft of a control valve, for example an operator for operating a valve shaft of a rotary control valve. Background technique [0002] Conventionally, in chemical plants and the like, regulating valves have been used for process control of flow rates. The valve opening of the regulating valve is adjusted by operating a valve shaft of the regulating valve by an operator (hereinafter also referred to as an “actuator”) based on a control signal from a positioner. [0003] Generally, in a rotary control valve such as a butterfly valve, the spool of the control valve may open and close due to the force of the controlled fluid. For example, in the case of an electric actuator, if the power supply to the actuator is cut off due to a power outage in the factory, etc., the holding force of the drive motor inside the actuator will be lost, and the adjustment may not be maintained. valve opening...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K31/53F16K31/04
CPCF16K31/047F16K31/53F16K31/088F16K31/535F16K31/055F16K31/045F16H1/28F16H35/10F16D43/20F16K1/221F16K31/043F16H2001/2881F16K31/048F16K31/08
Inventor 大桥智文
Owner YAMATAKE HONEYWELL CO LTD