Valve operating device

Abstract

The invention provides a valve operating device. By adopting the valve operating device, assigned torque at an input side is reduced, the characteristics of a normal-inverse rotation prevention function can be played, an output torque can be high efficiently acquired at an output side, more assigned torque on the operation can be loaded, and a compact structure can be achieved. In order to open and close a valve by rotating a valve rod of the valve which is arranged on a pipeline and the like, the valve operating device comprises a worm gear mechanism, a whirlwind-type reducer and a valve rod embedded shaft, wherein the worm gear mechanism is provided with a mechanism for inputting the rotation, a rotating shaft which rotates through the mechanism and is provided with a worm gear and a worm wheel which is engaged onto the worm gear; the whirlwind-type reducer is used for implementing the rotation input and reduction output of an input shaft for supporting the worm gear; and the valve rod embedded shaft is used for transferring the rotation output from the whirlwind-type reducer to the valve rod of the valve, so that the normal-inverse rotation prevention function achieved through the engagement between the rotating shaft and the worm wheel can be acquired, the output torque can be high efficiently acquired through the whirlwind-type reducer, and the compact structure can be realized through the combination of the worm gear mechanism and the whirlwind-type reducer.

Description

technical field [0001] The present invention relates to an operating device for opening and closing a valve, and more particularly to a valve operating device using a cyclone-type reducer that transmits a rotational input for the purpose of valve actuation. Background technique [0002] There are manual type, electric type, air motor type, etc. as an input mechanism which performs the operation|movement for opening and closing a valve by 90 degree rotation operation. The rotation input of the operating device for this purpose makes the transmission block with internal thread engage on the rotating threaded shaft with external thread, and when the rotating threaded shaft is rotated at the same position, the transmission block can The direction of the axis moves forward and backward corresponding to the direction of rotation. Therefore, the stem of the valve is engaged with a Scotch yoke provided so as to rotate by swinging on the cylindrical portion protruding from both oute...

AI Technical Summary

Problems solved by technology

However, even in valves that require high output torque, there are problems of constant output torque at the closed position, open position, and intermediate positions, and poor output efficiency

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