Air supply device expansion joint

Abstract

The invention discloses an air supply device expansion joint. The air supply device expansion joint comprises flanges, a connection pipe (I), a corrugated pipe connection pipe, an annular plate, a metal corrugated pipe (I), a corrugated pipe connection pipe and a connection pipe (II). The air supply device expansion joint is characterized in that flow guide barrels are arranged between the metal corrugated pipe (I) and the connection pipe (I) and between the metal corrugated pipe (I) and the connection pipe (II), one end of each flow guide barrel is connected with the annular plate, the other end of each flow guide barrel is connected with a flow guide barrel baffle, a gap is reserved between the flow guide barrel baffle and the connection pipe (I), a metal corrugated pipe (II) is welded between the connection pipe (I) and the connection pipe (II), two baffles are welded to the positions, located the two ends of the metal corrugated pipe (II), of the inner walls of the connection pipe (I), the portion between the blocking plates and the metal corrugated pipe (II) is filled with aluminum silicate ceramic fiber materials, baffle rings are welded to the inner walls of the connection pipe (I) and the inner wall the connection pipe (II) at a certain intervals. Meanwhile, high-temperature fire clay is poured, and a transportation pull rod assembly is connected to the flanges at two ends. The air supply device expansion joint has the advantages of being safe and reliable and long in service life.

Description

technical field [0001] The invention relates to a metal bellows expansion joint, in particular to an expansion joint of an air supply device. Background technique [0002] Metal bellows expansion joints are widely used in important industries such as electric power, metallurgy, chemical industry, construction, food, pharmaceuticals, etc., to compensate for the displacement of the piping system due to thermal expansion and contraction. For iron-making blast furnace air supply devices and other high-temperature medium transportation occasions, due to the high temperature, the high-temperature medium will cause great impact and creep damage to the metal bellows pipe body, so it is necessary to use high-temperature resistant high-temperature expansion joints, and the existing high-temperature expansion joints Using the labyrinth structure of the guide tube, and pouring high-temperature resistant castables inside the guide tube can temporarily solve the high temperature of the pi...

AI Technical Summary

Problems solved by technology

For iron-making blast furnace air supply devices and other high-temperature medium transportation occasions, due to the high temperature, the high-temperature medium will cause great impact and creep damage to the metal bellows pipe body, so it is necessary to use high-temperature resistant high-temperature expansion joints, and the existing high-temperature expansion joints Using the labyrinth structure of the guide tube, and pouring high-temperature resistant castables inside the guide tube can temporarily solve the high temperature of the pipeline and the requirements for the compensation amount of the expansion joint. However, this method leads to a very short service life of the expansion joint, which affects production. increase production costs

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