Buffer type large torque spring return actuator

Abstract

The invention relates to a pneumatic executing mechanism, in particular to a buffer type large-torque spring restoration executing mechanism with a final position pneumatic buffer structure, and belongs to the technical field of pneumatic executing mechanisms. The buffer type large-torque spring restoration executing mechanism comprises a cylinder body. The outer side of a left cylinder cover is connected with a left cylinder cover pressing plate through bolts. A guide sleeve is disposed in the cylinder body. The guide sleeve is tightly pressed on the left cylinder cover through the left cylinder cover pressing plate. The right side of a right cylinder cover is connected with a converting box through bolts. The rear end of the converting box is connected with a buffer air chamber. The rear end of the buffer air chamber is connected with the rear cylinder cover of the buffer air chamber. A buffer seat is connected to the rear cylinder cover of the buffer air chamber. A buffer plunger is slidably mounted in the buffer seat. The buffer type large-torque spring restoration executing mechanism has the advantages that the drive requirements of a valve acting frequently can be satisfied, internal component damage, caused by frequent acting, of the executing mechanism can be avoided effectively, and accordingly maintenance frequency can be lowered, and economical benefits can be increased.

Description

technical field [0001] The invention relates to a pneumatic actuator, specifically a large-torque spring return type pneumatic actuator with an end position air buffer structure, belonging to the technical field of pneumatic actuators. Background technique [0002] Industrial automation production is rapidly replacing the traditional industrial production mode, becoming the main force to promote productivity and reduce labor intensity of workers. With the rapid expansion of production scale, the specifications and control accuracy of control valves have become important factors restricting the process of industrial automation. Small-sized control valves can no longer meet the ever-expanding production capacity demand, mainly manifested in the fact that the actuator structure of the control valve used to drive cannot fully meet the drive device of large-sized control valves through the design mode of proportional amplification. Ordinary pneumatic rack-and-pinion actuators, p...

AI Technical Summary

Problems solved by technology

Small-sized control valves can no longer meet the ever-expanding production capacity demand, mainly manifested in the fact that the actuator structure of the control valve used to drive cannot fully meet the driving device of large-sized control valves through the design mode of proportional amplification.

Ordinary pneumatic rack-and-pinion actuators, pneumatic film-type quarter-turn actuators, and pneumatic piston-type quarter-turn actuators are widely used in rotary valves such as butterfly valves and ball valves. However, these actuators are often due to their structure and processing conditions. Due to the limitations of the valve, it cannot meet the valve requirements for frequent actions. It is easy to damage the internal components in the process of frequent actions, and even cause serious valve failures, so that the entire device is forced to stop for maintenance, which brings greater economic losses to customers.

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