High-pressure flange sealing structure used on heat exchange device header

Abstract

The invention discloses a high-pressure flange sealing structure used on a heat exchange device header. The high-pressure flange sealing structure used on the heat exchange device header comprises a header flange and a header side plate flange, wherein a retainer ring is arranged on a part located at the inner side of a flange connection hole, of the header flange, a main sealing bar is placed atthe inner side of the retainer ring and then is bonded onto the inner side of the retainer ring through a plurality of main anti-separating blocks arranged on the header flange, and when the main sealing bar is in an unpressed state, the height H of the main sealing bar is greater than the height H' of the retainer ring; and the main sealing bar is formed by integrally forming a semi-annular sealing ring and a rectangular sealing ring, the semi-annular sealing ring is located at the inner side of the rectangular sealing ring, an annular through hole is formed in the semi-annular sealing ring;and the annular through hole and a semi-annular ring of the semi-annular sealing ring are concentric in the same section. The high-pressure flange sealing structure used on the heat exchange device header is high in sealing performance, and applicable to occasions with high pressure and large temperature fluctuation.

Description

technical field [0001] The invention relates to an energy-saving and emission-reducing heat exchange device for optimal utilization of flue gas, in particular to a high-pressure flange sealing structure used on a header of the heat exchange device. Background technique [0002] Large-scale pipelines involved in electric power, steel and other industries are generally connected by large flanges. For the sealing of large flanges with low working conditions, flat gaskets are usually used for sealing, and flat gaskets are the most common mandatory seals. The principle of flat gasket sealing is to rely on the fastening bolts on the large flange to apply sufficient compressive force to achieve sealing under preload and working pressure. [0003] The flat gaskets in the flat gasket seal are all disposable. For large flanges with large structural dimensions and heavy structures, the flat gaskets need to be replaced every time they are overhauled, and the replacement of flat gaskets ...

AI Technical Summary

Problems solved by technology

[0003] The flat gaskets in the flat gasket seal are all disposable. For large flanges with large structural dimensions and cumbersome structures, the flat gaskets need to be replaced every time they are overhauled, and the replacement of flat gaskets is very frequent.

In addition, the larger the size of the large flange structure and the greater the working pressure it bears, the more difficult it is to ensure the flatness of the flange connection surface, so it is difficult to use flat gaskets to seal without leakage

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