Bidirectional push-pull type hot air isolating door

Abstract

The invention relates to a bidirectional push-pull type hot air isolating door which is characterized in that the two sides of a door frame are provided with driving devices in a symmetrical way; each driving device comprises a driving nut body, a drive screw, an electric executing device, a push-pull rod support seat, a push-pull rod and a push-pull rod seat, wherein one end of the drive screw is connected on the door frame, and the other end thereof is meshed and connected with the electric executing device; the driving nut body is fixed under the push-pull rod support seat; one end of the push-pull rod is installed on the push-pull rod support seat, and the other end thereof is arranged on the push-pull rod seat; and the push-pull rod seat is arranged at the side where a door sheet deviates from a sealing surface, and the push-pull rod is connected with the door sheet by the push-pull rod seat. The hot air isolating door is provided with the door sheet which is divided into two parts that can move towards the two sides, are respectively controlled by a set of executing mechanism and have no mutual interference; the door sheet can be flexibly and reliably opened, has high strength and does not cause stress deformation; the door sheet can be put away into the door, so that dust can not be leaked on the door sheet in a room; furthermore, the hot air isolating door can continuously blow and sweep the sealing surface, thus reducing the maintenance and the failure rate and greatly improving the sealing performance of the hot air isolating door.

Description

technical field [0001] The invention relates to a two-way push-pull hot air isolation door, specifically, it is suitable for boiler systems of large units of thermal power plants such as 600MW and 1000MW ultra-wide and super-large flue ducts. . Background technique [0002] In the prior art, the two-way push-pull hot air isolation door installed in the vertical flue mainly includes a door seat, a door panel, an electric / pneumatic actuator, and the like. Usually, two door panels are opened to both sides, so there must be enough space on both sides of the flue, and the electric / pneumatic actuator needs to be installed parallel to the ground. [0003] The original design of the hot air isolation door is mostly used in the flue with a small smoke flow, so the door panel is a whole. And when the flue gas flow increases, the flue will also be widened and enlarged, and the corresponding thermal insulation door panel will also be enlarged, so the gravity of the door panel itself w...

AI Technical Summary

Problems solved by technology

And when the flue gas flow increases, the flue will also be widened and enlarged, and the corresponding thermal insulation door panel will also be enlarged, so the gravity of the door panel itself will also increase, which will increase the frictional resistance and cause the door panel to run It is not flexible; at the same time, the stress and deformation of the door panel are also increased, so that the door panel is not closed tightly, resulting in leakage, and cannot play a role of complete sealing

In actual production, due to errors in production, the door seat and door panel cannot be completely flat, so that the packing on the sealing surface of the door panel and the door seat, the locking eccentric wheel and the door panel cannot be completely contacted. It cannot be completely locked, which also causes leakage and cannot play a role in complete sealing.

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