Built-in type hot melt belt connection method of steel plastic composite tube with outer wall possessing vertical reinforcing rib

Abstract

The invention relates to an internal fusion band connecting method of steel plastic composite tube whose outer wall has vertical strengthened rib. Wherein, it comprises that first arranging the fusion band (2) on the connection part of inner wall of composite tube; arranging support (4) at relative position; moving the support rod (6) of support (4) outwards, until the support plate (5) compresses the fusion band (2) contacted with inner wall of tube; connecting the wire terminal (8) of fusion band (2) and the power, to heat the fusion band (2) to weld the fusion band (2) and the inner wall of tube. The invention can avoid stress at the connection part to crack the corner seam, with simple process and reliable connection.

Description

technical field [0001] The invention relates to the connection of composite pipes, especially the connection of steel-plastic composite pipes formed by winding with vertical reinforcing ribs on the outer wall. technical background [0002] For the connection of plastic pipes, a simple and reliable connection method is often selected according to the manufacturing method of the pipe and the structural characteristics of the pipe wall. [0003] For the double-wall corrugated drainage pipe produced by extrusion, because it is convenient to make a socket at the pipe end, the connection method of socket and rubber ring seal is adopted. For the pure plastic special-shaped strip produced by extrusion, the hollow winding drainage pipe formed by winding and welding, because its outer wall is flat, it adopts heat shrinkable tape winding outsourcing, rubber ring plus stainless steel loop and electric heating. A variety of connection methods such as melting belt outsourcing and welding...

AI Technical Summary

Problems solved by technology

However, this connection method is complex and difficult to manufacture and has low efficacy; secondly, the welding labor intensity of on-site construction is high, and the welding strength is low

When the length of the pipe changes due to thermal expansion and contraction, or the pipe deforms and moves due to soil subsidence or groundwater uplift, the stress generated at the pipe connection can easily cause the fillet weld between the socket and the pipe to be torn and cause the connection destroy

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