Explosive-proof straight travel electric actuator

Abstract

The invention provides an explosive-proof straight travel electric actuator, capable of solving the problem that the traditional electric actuator cannot be switched back and forth between manual operation and electric operation. The explosive-proof straight travel electric actuator comprises a shell; a valve rod, a motor, a manual shaft, a worm, a worm wheel, a manual bevel gear, a clutch pawl and a switching handle, wherein the manual shaft is meshed with the manual bevel gear; a clutch pawl sleeve is linked with the valve rod, and the clutch pawl can be driven to rotate by the manual bevel gear; a compression spring I is arranged between the clutch pawl and the manual bevel gear; the worm wheel is linked with the valve rod and is driven by the motor; a clutch rack is arranged between the worm wheel and the clutch pawl; one end of the clutch rack is hinged with a safety pin; the switching handle is provided with a shifting block and a volute spiral spring; a back-up block is hinged in the shell; a compression spring II is arranged between the shifting block and the back-up block; the upper end of the shifting block is provided with a lobe abutting on the other end of the clutch rack and the upper end of the back-up block. The explosive-proof straight travel electric actuator has the advantages of manual semi-automatic switching operation and electric semi-automatic switching operation.

Description

technical field [0001] The invention relates to an electric actuator, in particular to an explosion-proof linear stroke electric actuator. Background technique [0002] At present, the existing electric actuators mainly include two types, one is the electric actuator with no manual function and pure electric work, this electric actuator has a single operation, no debugging in case of power failure and manual handling of emergencies, The safety performance is poor; the other is an electric actuator with manual adjustment. Although this electric actuator can perform related manual adjustment operations, there is no mutual clutch mechanism or switching mechanism between manual operation and electric operation. Therefore, the manual operation will drive the motor to rotate at the same time and generate a reverse current, which will not only easily damage the internal electronic components of the electric actuator, but also pose a great safety hazard during operation. Contents ...

AI Technical Summary

Problems solved by technology

[0002] At present, the existing electric actuators mainly include two types, one is the electric actuator without manual function, which is purely electric. The safety performance is poor; the other is an electric actuator with manual adjustment. Although this electric actuator can perform related manual adjustment operations, there is no mutual clutch mechanism or switching mechanism between manual operation and electric operation. Therefore, the manual operation will drive the motor to rotate at the same time and generate a reverse current, which will not only easily damage the internal electronic components of the electric actuator, but also pose a great safety hazard during operation.

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