An electric actuator manual automatic switching device and method

Abstract

The invention discloses a manual-operation and automatic-operation switching device and method for an electric actuator. The manual-operation and automatic-operation switching device comprises a key shaft, a spring, a transmission shaft, a shifting fork, an electromagnet, a shell, a torsion spring, a switching circuit board, a contact piece and a connector, wherein the connector comprises a lowerjaw and an upper jaw, the lower jaw is connected with the right end of the transmission shaft, and the upper jaw is connected with a rotor shaft of a motor; the spring is arranged at the outer side ofthe key shaft, the right end of the key shaft is connected with the left end of the transmission shaft, the contact piece is connected with the switching circuit board, the shifting fork is connectedto the shell through a shifting fork shaft, the shifting fork is connected with the torsion spring, the electromagnet and the lower jaw, and the torsion spring is connected with the key shaft. Compared with the defects such as complexity and difficult operation of the traditional structure, the manual-operation and automatic-operation switching device is simple in structure, simple and convenientto operate and stable in performance. In addition, the manual-operation and automatic-operation switching device is small in environmental stability influences and works stably at an extreme temperature.

Description

Technical field [0001] The invention relates to an automatic hand-switching device and method of an electric actuator, belonging to the technical field of electromechanical engineering. Background technique [0002] Electric actuators must be set to manually open and close the valve function in accordance with relevant technical standards to ensure that the valve can be manually opened and closed in case of automatic failure and emergency, so as to avoid accidents. Due to the constraints of the internal structure of traditional machines, when switching to manual mode, the power source must be prevented from following rotation to ensure that the machine can open or close the valve normally. This requires the power source to have reliable self-locking characteristics in manual mode. But in the automatic mode, the self-locking mechanism will fail due to the high-speed movement of the power source, resulting in the lack of specific functions of the machine, which will affect the use....

AI Technical Summary

Problems solved by technology

However, in the automatic mode, the self-locking mechanism will fail due to the high-speed movement of the power source, resulting in the lack of specific functions of the machine, which will affect the use

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