Expansion ring sealed hot compensator

Abstract

The invention provides an expansion ring sealed hot compensator for high-temperature gas conveying tubes, which comprises a pair of flanges, a pair of inner connecting tubes, a pair of inner annular plates, labyrinth seals, outer connecting tubes, ear plates, flame retardant coatings, a heat insulation filling material, and expansion ring sealed bellows, wherein the pair of flanges are arranged attwo ends; the pair of inner connecting tubes are respectively connected to the two flanges; the pair of inner annular plates forming expansion rings of the compensator are arranged at opposite ends o f the two inner connecting tubes; the labyrinth seals consisting of inner and outer sleeves are arranged on the inner ring sides of the two inner annular plates; the outer connecting tubes provided with compensating bellows are connected with the two inner connecting tubes through a pair of outer annular plates; the outsides of the two inner connecting tubes are provided with the ear plates provided with pull rods; the insides of the two inner connecting tubes are provided with the flame retardant coatings; the heat insulation filling material is arranged between the two inner annular plates and the inner and outer connecting tubes; and the opposite ends of the two inner connecting tubes are provided with the expansion ring sealed bellows. The expansion ring sealed hot compensator utilizesthe expansion ring sealed bellows to obstruct hot air round the labyrinth seals to prevent the hot air reaching the compensating bellows through the expansion rings and avoid the compensating bellows being damaged due to oxidization under the action of high temperature so as to effectively improve the operation life of the compensator.

Description

technical field [0001] The invention relates to an expansion compensation device for a high-temperature gas delivery pipeline, in particular to a telescopic ring-sealed high-temperature compensator. Background technique [0002] In the prior art, the high temperature compensator used in the high temperature gas transmission pipeline adopts a combined structure of inner and outer connecting pipes, wherein the outer connecting pipe is equipped with a compensation bellows, and the middle of the inner connecting pipe is disconnected to form a telescopic ring of the compensator. The labyrinth seal composed of the flow sleeve and the outer sleeve, and a refractory layer is set on the inner side of the inner connecting pipe, and heat insulating filling materials are arranged between the inner and outer connecting pipes and the telescopic ring, so that the structure can withstand high temperature and has a variety of large displacement compensation. Amount of high temperature compen...

AI Technical Summary

Problems solved by technology

The high temperature compensator with the above structure has the problem that the working life of the compensation bellows is relatively short in the actual use process. The temperature of the compensation bellows will rise rapidly when the temperature of the compensation bellows rises rapidly when the continuous high-temperature hot air reaches the compensation bellows. When the temperature of the compensation bellows rises above 300°C, the compensation bellows In contact with ambient air, the stainless steel bellows will quickly oxidize and turn red. After being oxidized, the bellows will lose their elasticity and fail in a short time.

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