Double axial compensation type expansion joint

Abstract

The invention discloses a double axial compensation type expansion joint which comprises a left connecting pipe, a right connecting pipe, a corrugated pipe, a left liner pipe, a right liner pipe and elastic heat-insulation blocks. Two ends of the corrugated pipe are respectively fixed to the left connecting pipe and the right connecting pipe, one end of an outer flow guide pipe is fixedly connected with the left connecting pipe, the other end of the outer flow guide pipe extends to the inner side of the right connecting pipe, a first gap is reserved between coincidence sections of the other end of the outer flow guide pipe and the right connecting pipe, the outer flow guide pipe can axially move in the first gap, and an outer axial compensation structure is jointly formed by the outer flow guide pipe and the corrugated pipe; one end of an inner flow guide pipe is fixed to the left liner pipe, the other end of the inner flow guide pipe extends to the inner side of the right liner pipe, a second gap is reserved between coincidence sections of the other end of the inner flow guide pipe and the right liner pipe, the inner flow guide pipe can axially move in the second gap, the elastic heat-insulation blocks can be axially compressed, and an inner axial compensation structure is jointly formed by the inner flow guide pipe and the elastic heat-insulation blocks. The double axial compensation type expansion joint has the advantages that the designed position of the corrugated pipe can be guaranteed by the double axial compensation structures when the corrugated pipe is forcefully scoured by flue gas, and accordingly axial compensation effects can be realized.

Description

technical field [0001] The invention relates to the field of high-temperature metallurgy, in particular to a double axial compensation type expansion joint used for a flue gas discharge pipe after high-temperature metallurgy. Background technique [0002] In the process of metallurgy and chemical industry, high-temperature flue gas that needs to be transported by pipeline will be generated. When the high-temperature flue gas passes through the pipeline, it will transfer heat to the outside, which will increase the temperature of the pipeline shell, and at the same time will generate axial thrust to cause damage to the pipeline. Axial expansion joints are used to absorb or compensate axial deformation and axial thrust. An existing axial expansion joint such as the "high temperature resistant metal corrugated expansion joint" disclosed in Chinese patent CN201120420904.1, the high temperature resistant metal corrugated expansion joint is provided with a refractory castable laye...

AI Technical Summary

Problems solved by technology

However, the temperature of the flue gas generated in the metallurgical and chemical process is very high and the erosion is strong. The existing expansion joints are difficult to meet the needs. Compensation, which seriously affects the use effect and service life of the entire expansion joint

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