Heat-resistant type vaporizing flue metal corrugated expansion joint

Abstract

The invention discloses a heat-resistant type vaporizing flue metal corrugated expansion joint. The heat-resistant type vaporizing flue metal corrugated expansion joint comprises end adapter tubes, corrugated tubes, fillers, first pouring material layers, anchors, a hexmetal, a medium adapter tube, second pouring material layers and coatings. The fillers with the inner bore radium smaller than theadjacent first pouring material layers are arranged on the inner walls of the corrugated tubes. The coatings are coated on the inner bore wall formed by the fillers, the thickness of the coatings isequal to a difference value of the fillers and the radii of the first pouring material layers, the hexmetal covers the expansion joint inner bore wall formed by the first pouring material layers and the coatings, then the layer of second pouring material layers are coated on the inner bore wall, and the inner bore wall with the abrasion resistance under a high-temperature working condition is formed after curing. According to the heat-resistant type vaporizing flue metal corrugated expansion joint, a thermal insulating layer and an abrasion-resistant layer are additionally arranged on the inner wall of the expansion joint, the operational condition of the corrugated tubes is greatly improved, safe and efficient operation is achieved under the premise of not affecting that an elastic compensation function of the corrugated tubes is not damaged, thus the service life of the expansion joint is greatly prolonged, and the maintenance cost of users is reduced.

Description

technical field [0001] The invention belongs to a technical proposal in a pipeline safety device, in particular, the invention relates to an expansion joint, especially a heat-resistant vaporization flue metal corrugated expansion joint. Background technique [0002] The furnace (kiln) is an important infrastructure in the metallurgical industry. Due to the special working conditions of the vaporization flue, the matching expansion joint is quite different from the matching requirements of other industries. The difference is mainly reflected in the following two aspects. One is The specifications are super large, with a diameter of several meters; the second is that the working medium is waste gas with a temperature of about 1500 °C. Therefore, the super-large-diameter expansion joints configured in the vaporization flue of the metallurgical industry must not only be resistant to high temperatures, but also have strong corrosion resistance. In order to meet the supporting r...

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Problems solved by technology

However, due to the single-layer structure of the metal bellows in the prior art, its rigidity is relatively large, and the elastic compensation flexibility of the metal bellows is not enough during operation. In addition, the inner wall of the metal bellows lacks a heat-insulating structure layer, and high temperatures can easily lead to metal corrugation. Pipe instability or corrosion problems

Since the diameter of the vaporization flue in the metallurgical industry is usually more than several meters, once a failure occurs in the project, it is very troublesome to replace or maintain such a large component, which requires a lot of manpower and material resources. The most fundamental thing is that the maintenance cost is high.

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