Air preheater sector plate circular arc section sealing device

Abstract

The invention relates to the field of air preheaters, in particular to a sealing mechanism. A sealing device of a circular arc section of a fan-shaped plate of an air preheater comprises fan-shaped plate sealing angle steel and a bypass sealing piece, wherein one end of the bypass sealing piece is fixedly connected on a hot end connecting ring through a bracket; the other end of the bypass sealing piece is leaned on a sealing surface of the circular arc section of the fan-shaped plate through elastic restoring force; a hot end lug plate and a fan-shaped plate lug plate are respectively arranged on the hot end connecting ring and the sealing surface of the circular arc section of the fan-shaped plate; a corrugated pipe is arranged on the sealing surface of the circular arc section of the fan-shaped plate in a sleeving manner; one end of the corrugated pipe is fixedly connected on the fan-shaped plate lug plate through a movable connecting annular plate; and the other end of the corrugated pipe is fixedly connected on the hot end lug plate through a static connecting annular plate. According to the sealing device, the corrugated pipe is arranged between the circular arc section of the fan-shaped plate and the connecting ring, and an air flow channel of an original leakage interval is covered by the corrugated pipe, so that a leakage zone is completely isolated, the smoke leakage is reduced, and the entire sealing level is improved.

Description

technical field [0001] The invention relates to the field of air preheaters, in particular to a sealing mechanism. Background technique [0002] At present, the static seal of the "straight side section" of the fan-shaped plate of the air preheater adopts the elastic element "U-shaped corrugated plate", which is a contact seal and has a good effect. The "arc section" adopts non-contact "sector plate sealing angle steel", such as figure 1 As shown, the existing sealing structure of the circular arc section of the fan-shaped plate includes a fan-shaped plate sealing angle steel 1 and a bypass sealing sheet 2. One end of the bypass sealing sheet 2 is fixedly connected to the hot end connection ring 3 through a bracket, and the bypass sealing sheet 2 The other end of the fan plate rests on the sealing surface 4 of the circular arc section of the fan plate through the elastic restoring force; because the sealing angle steel 1 of the fan plate is relatively poor in sealing effect...

AI Technical Summary

Problems solved by technology

The "arc section" adopts non-contact "sector plate sealing angle steel", such as figure 1 As shown, the existing sealing structure of the circular arc section of the fan-shaped plate includes a fan-shaped plate sealing angle steel 1 and a bypass sealing sheet 2. One end of the bypass sealing sheet 2 is fixedly connected to the hot end connection ring 3 through a bracket, and the bypass sealing sheet 2 The other end of the fan plate rests on the sealing surface 4 of the circular arc section of the fan plate through the elastic restoring force; because the sealing angle steel 1 of the fan plate is relatively poor in sealing effect, the sealing angle steel 1 of the fan plate itself is in contact with the circular arc of the fan plate There will be a little leakage gap 5 between the section sealing surfaces 4, and there is also a large leakage space 6 at the connection between the bypass sealing sheet 2 and the fan-shaped plate sealing angle steel 1, and the bypass sealing sheet 2 is constantly leaking during work. The action itself will also cause wear and tear to cause leakage; therefore, the leakage in this sealing area is relatively serious, and it is necessary to improve the sealing method of the circular arc section of the fan-shaped plate to solve the leakage at the joint between the bypass sealing sheet and the sealing angle steel of the fan-shaped plate, and improve the sealing efficiency sealed structure

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