Electric and manual switching device of valve electric actuating mechanism

Abstract

The invention offers a kind of electric or manually operation device of the valve electric actuating mechanism mainly includes an output axis, a rear torus, a conjugant, a hand wheel, a switchover operation part and a spring. The conjugant insures synchronous rotary with the output axis at the same time can slip up-and-down along the output axis with axial direction and by the effecting of switch operation part and the spring the conjugant can individually slip to the hand wheel or the rear torus to reach the state of junction. On the external circular planning of the conjunction section of the output axis and the conjugant sets up an axial outer slip ark and at the position of output axis outer slip ark corresponding to the lateral conjugant inner circular planning sets up an inner slip ark at the axial direction. Between the relative outer slip ark and inner slip ark forms a rolling element hole and in the rolling element sets up a rolling element. This switch device has the characteristics like easy use and small resistance.

Description

technical field [0001] The invention relates to an electric actuator for a valve, in particular to an electric and manual switching device for an electric actuator for a valve. Background technique [0002] The existing electric and manual switching devices of valve electric actuators are shown in Figure 1 and Figure 2, and mainly include an output shaft 1, a worm wheel 2, an adapter 3, a hand wheel 4, a switching operation member 5, and a spring 6, wherein the adapter 3. While ensuring the synchronous rotation with the output shaft 1, it can slide up and down along the axis of the output shaft 1. Under the action of the switching operation part 5 and the spring 6, the joint member 3 can slide to the phase with the hand wheel 4 or the worm wheel 2 respectively. In the engaged state, when the joint 3 is engaged with the hand wheel 4, the rotation of the hand wheel 4 will drive the output shaft 1 to rotate through the joint 3, and when the joint 3 is engaged with the worm whee...

AI Technical Summary

Problems solved by technology

[0002] The existing electric and manual switching devices of valve electric actuators are shown in Figure 1 and Figure 2, and mainly include an output shaft 1, a worm wheel 2, an adapter 3, a hand wheel 4, a switching operation member 5, and a spring 6, wherein the adapter 3. While ensuring the synchronous rotation with the output shaft 1, it can slide up and down along the axis of the output shaft 1. Under the action of the switching operation part 5 and the spring 6, the joint member 3 can slide to the phase with the hand wheel 4 or the worm wheel 2 respectively. In the engaged state, when the joint 3 is engaged with the hand wheel 4, the rotation of the hand wheel 4 will drive the output shaft 1 to rotate through the joint 3, and when the joint 3 is engaged with the worm wheel 2, the worm wheel 2 will drive the output shaft through the joint 3 1 rotation, wherein the linkage between the adapter 3 and the output shaft 1 depends on the cooperation between the protrusion and the sliding groove between the two. When the action force and reaction force are large, the two will generate a large friction force between the protrusion and the slide groove, making it difficult for the joint member 3 to slide axially, or even unable to slide, thus affecting the performance of the valve electric actuator. Convenient and reliable use of electric and manual switching devices

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