The importance of pipe installation of expansion joint, expansion joint due to connect extension tube or the temperature change of the corrugated tube is bigger, the use of the expansion joint is a kind of protective measures, expansion joint is pumps, valves, pipes and other equipment and pipeline connection of new products, connected by the bolt, making it a whole, and has certain displacement, convenient installation. Can withstand the axial pressure of the pipeline. In this way, the installation and maintenance can be adjusted according to the site installation size, which not only improves the work efficiency, but also protects the pump, valve and other pipeline equipment.

 

Principle of pipe expansion and expansion of large, withstand high temperature, compression area strength. In building water supply and drainage engineering foundation concrete pouring or embedded pipeline, by building foundation settlement in the engineering pipeline, equipment resonance, geological change, the pipeline medium in the process of change, the position of the pipeline distribution began to stress, deformation, distortion destruction pipeline, embedded pipeline rupture even brings great inconvenience to the construction unit, in order to overcome these difficulties, ensure the safety of pipeline operation, using the expansion, the expansion joint: it can within a certain range of the axial expansion, overcome all sorts of Angle displacement, different heart, telescopic pipe, expansion. The pipe is free to flex in the telescopic device. Once the maximum expansion of its own limit function. So as to ensure the safe operation of the pipeline!

Choose the location of the telescopic joint buttress: the buttress can bear the weight of the pipe and the weight of the telescopic joint, which is equivalent to the pier of the bridge, and the pipe can be continuously supported on the buttress, so that the position of the pipe and the telescopic joint can move freely. Position selection of buttress: spacing 6~12m, L is 3m when D is especially large. Small span of buttress → small M, Q(bending moment and shear force) → high cost of buttress. Buttress types are divided into ring type, saddle type and sliding type. The buttress can effectively prevent the expansion and contraction of large open-mounted pipelines and expansion joints from being moved freely without damage under the natural temperature change.