A manual drive device for multi-turn valves with valve position display

Abstract

The invention discloses a multi-rotation valve manual drive device with a valve position displaying function. The multi-rotation valve manual drive device comprises a bevel gear wheel, a bevel pinion and a switch position indicator, wherein the bevel gear wheel and the bevel pinion are mutually engaged, and the switch position indicator is arranged on a gear shaft of the bevel pinion. The switch position indicator comprises a primary transmission mechanism and a secondary transmission mechanism which are mutually engaged and are arranged in an indicator shell, wherein the primary transmission mechanism is composed of a fixed internal gear, a planetary gear and a transmission gear, the secondary transmission mechanism is composed of a fixed internal gear, a secondary transmission gear and a movable internal gear, the movable internal gear is arranged in a movable internal gear edge and synchronously rotates with the movable internal gear edge, the movable internal gear edge is provided with a pointer, and the opening degree scales and switch position signs are arranged on the surface of the indicator shell. By means of the manner, the multi-rotation valve manual drive device is simple and reasonable in structure, and as the switch position indicator is arranged at the position of a hand wheel, the station where a valve is located can be visually displayed.

Description

technical field [0001] The invention relates to the field of valve supporting devices, in particular to a multi-turn valve manual drive device with valve position display. Background technique [0002] With the continuous expansion of the application range of valves, in some working conditions that require more precise control, such as throttle valves, which do not need to be adjusted frequently, such as using electric actuators for control, the cost is extremely high. In this case, it is generally only necessary to use a manual drive for manual operation. In the existing design, some customers assemble the multi-turn valve manual drive device on the rising stem gate valve, only requiring dust-proofing of the valve stem, and only two states of fully open or fully closed for the working state of the valve. , and whether the valve is fully open or fully closed, there is no visual display on the outside except for the actual operator himself. There are also some customers who...

AI Technical Summary

Problems solved by technology

[0003] But when the manual driving device of the multi-turn valve is assembled on the dark stem gate valve, the upper operating part of the valve stem is fixed up and down, and does not protrude from the manual driving device of the multi-turn valve. The working position of the valve can be judged by observing the position of the indicator rod. The design of the bit is not applicable, which requires a new technical solution to apply to this situation

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