Mechanical in-place feedback device for travel switch of plugboard type air door

Abstract

The invention discloses a mechanical in-place feedback device for a travel switch of a plugboard type air door. The mechanical in-place feedback device comprises a travel push rod, the travel push rod is mounted in a push rod fixing base, the push rod fixing base is mounted on the door frame, a contact piece of the travel push rod can contact a contact piece of the travel switch at the external, the push rod fixing base is arranged at one end of the inner side of an air door, and the top of the push rod fixing base is sleeved with an air door inner side large nut, the air door inner side large nut wraps an air door inner side graphite ring and an air door inner side seal ring, the push rod fixing seat is arranged at one end of the air door outer side and connected with one end of a seal shaft pipe, the other end of the seal shaft pipe is sleeved with an air door outer side large nut, the air door outer side large nut wraps an air door outer side graphite ring and an air door outer side seal ring, one end of a push rod return spring is fixed on the seal shaft pipe, and the other end is fixed to a travel push rod. The beneficial effect of the mechanical in-place feedback device for the travel switch of the plugboard type air door is that direct corrosion on spring caused by high temperature medium in air channel can be avoided, because a push rod return spring is mounted on the outer side of an air door.

Description

technical field [0001] The invention belongs to the field of mechanical equipment, and relates to a mechanical feedback device for a position switch of a plug-in damper. Background technique [0002] For a long time, the plug-in damper has often occurred during operation. The travel feedback device cannot accurately and effectively feedback the switch position of the damper, which leads to the inability to accurately grasp the switch position of the damper during the production process of the power plant, which has caused serious damage to the production safety of the power plant. troubled. [0003] The existing spring built-in type, the spring is prone to heat aging; there is no sealing structure inside the air duct, and the shaft tube is easy to accumulate dust and jam. The old-fashioned stroke ejector is a built-in spring, and the spring will age after being heated for a long time, resulting in a decrease in elasticity, which will cause the ejector to fail to rebound. A...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a mechanical feedback device for the position switch of the plug-in damper, which solves the problems of dust accumulation, spring aging and shaft seal leakage of the mechanical feedback device of the damper.

Images