In-position mechanical feedback device for stroke switch for plug-in damper

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 with a stroke switch in place for a plug-in type air door. Background technique

[0002] For a long time, the flapper type damper often appears during operation. The stroke feedback device cannot accurately and effectively feedback the opening and closing position of the damper. As a result, the power plant cannot accurately grasp the opening and closing position of the damper during the production process, which will cause the safety of the power plant. Troubled.

[0003] The existing spring has a built-in type, and the spring is easy to be heated and aged; there is no sealing structure on the inside of the air duct, and it is easy to accumulate dust and jam in the shaft tube. The old-fashioned stroke ejector rod is a spring built-in type, and the spring will age after being heated for a long time, resulting in a decrease in elasticity, which makes the ej...

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