Operating device

Abstract

The invention provides an operating device. A movement torque required for the fully closing or fully opening of a valve can be sufficiently obtained. The operating device is provided with a swinging Scotch yoke fixedly installed on a rotary shaft, a transfer block being clamped on the Scotch yoke in a free sliding manner and making linear movement, a rotary threaded shaft embedded on the transfer block to drive the transfer block to make a linear movement and a rotation driving device installed on the end part of the rotary threaded shaft and used for driving the rotary threaded shaft to rotate, wherein the Scotch yoke is provided with a two-tined arm extending from the rotary shaft and clamping the transfer block and specified-width rail bar parts relatively arranged on two inner sides of the arm; the two end parts of the transfer block in the length direction of two side faces clamped by the two-tined arm are provided with push parts, and the push parts are butted against the rail bar parts in correspondence with the rotating radius and the swinging angle required by the Scotch yoke. For the operating device, the rotary shaft is directly linked to a valve rod of the valve to be used as the operating device for operating the valve.

Description

technical field [0001] The present invention relates to an operating device for actuating a valve, and more particularly to an operating device enabling operation based on rotational power. Background technique [0002] Among the operating devices that operate the opening and closing of valves, there are operating devices that perform manual, electric, air motor, etc. input through rotational drive, and move the transmission block through the resulting rotation. This movement causes the Scotch yoke to swing, and the movement is converted into a rotational motion to open and close the valve. [0003] As a conventional operating device, among manual operating devices, there are Figure 8 An operating device using a worm gear as shown is constituted by a gear reducer combining a worm shaft 5 at the input with a worm wheel 6 mounted on the valve stem 9 at the output. In this operating device, the reduction ratio can be changed by increasing or decreasing the number of teeth of ...

AI Technical Summary

Problems solved by technology

[0030] If such an operating device is adopted, it cannot cope with the current situation of more compact and high output torque in today's larger valve diameter and higher pressure.

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