High-temperature prevention axial expansion joint

Abstract

The invention discloses a high-temperature prevention axial expansion joint, which comprises connection pipes, a left flow guide pipe, sheaths, a corrugated pipe, a filler, a right flow guide pipe, short anchors, long anchors and a lining, wherein one end of the left flow guide pipe, which is provided with a flange edge, and one end of the right flow guide pipe, which is provided with a flange edge, are outwards in coaxial clearance fit; the connection pipes are sleeved on the outer walls of the flange edges respectively and are in sealing connection with the outer walls of the flange edge; the sheaths at two ends of the corrugated pipe are respectively connected with the connection pipes on the two sides in a sealed manner to form a corrugated pipe axial displacement structure; and the filler is arranged in the corrugated pipe to form a heat isolation structure. The long anchors are uniformly distributed on the annular inner hole walls in the ends of the connection pipes; the short anchors are uniformly distributed on the inner wall of the two flow guide pipes; a preset anchor is used as a framework in which the lining is enameled during in-site mounting of the construction; and the lining enameled into a lining structure stops diffusion of heat of a medium. By a double-channel heat isolation structure, an accident of overheat stability loss of the corrugated pipe is prevented; and the expansion joint can run normally.

Description

technical field [0001] The invention relates to a pipeline safety device, in particular, the invention relates to an axial expansion joint with a built-in heat-resistant and temperature-insulating structure. Background technique [0002] The modern cement manufacturing industry usually uses advanced multi-stage preheating and precalcining rotary kilns to produce cement, and the clinker produced between the rotary kilns is transported through pipelines. This efficient transmission method is energy-saving and environmentally friendly, and has been widely used. Under normal circumstances, the temperature of the clinker just produced from the rotary kiln is above 1000°C. When the pipeline continues to transport the high-temperature clinker, it is also passively heated, and the temperature rise of the pipeline produces corresponding axial deformation and axial thrust. The expansion joint in the pipeline is used to absorb or compensate the axial deformation and axial thrust, so as...

AI Technical Summary

Problems solved by technology

However, there is also the problem that the expansion joint is easily damaged in practical applications. The reason is that the existing commodity expansion joints on the market lack a heat-insulating structure and are greatly affected by the ambient temperature. In particular, the bellows in the expansion joint is a thin-walled Elastic compensation element, when the temperature of the expansion joint reaches the clinker temperature, the heated thin-walled corrugated pipe is prone to instability, once the bellows undergoes plastic deformation, it will lose its proper elastic compensation function, and the failure of the expansion joint will bring safety hazards to the operation of the supporting pipeline

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