Sealed pipeline

Abstract

The invention discloses a sealed pipeline. The sealed pipeline comprises a plastic pipeline body which comprises an inner ring and an outer ring. A metal drum is arranged between the inner ring and the outer ring. One end of the metal drum extends out of the plastic pipeline body. An end opening part of the plastic pipeline body comprises a connecting part and an insertion part. The connecting part is formed through flanging and connected with the outer ring. A plurality of threaded holes are evenly distributed in the circumferential direction of the connecting part. The insertion part is connected with the inner ring. The outer diameter of the insertion part is equal to the diameter of the inner ring of a plastic pipeline. Compared with the prior art, a joint of two adjacent plastic pipelines is free of gap, so that the leakproofness of the plastic pipelines is improved, and gas exhausting and water draining of the plastic pipelines are more convenient.

Description

technical field [0001] The invention relates to the technical field of pipe fittings. Background technique [0002] Plastic pipes are generally made of synthetic resin, that is, polyester, added with stabilizers, lubricants, plasticizers, etc., and extruded in a pipe making machine by a "plastic" method. Because of its light weight, corrosion resistance, beautiful appearance, no bad smell, easy processing and convenient construction, it has been more and more widely used in construction projects. It is mainly used for water supply system piping, drainage, exhaust and sewage sanitary pipes, underground drainage pipe systems, rainwater pipes, and threading pipes for wire installation in housing construction. [0003] Currently known plastic pipe connection methods include hot melt connection and electrofusion connection. These two methods are to make the plastic pipe connection part melt, solidify again and then connect together. After the connection is completed through the ...

AI Technical Summary

Problems solved by technology

[0003] Currently known plastic pipe connection methods include hot melt connection and electrofusion connection. These two methods are to make the plastic pipe connection part melt, solidify again and then connect together. After the connection is completed through the above connection method, it cannot be connected again. Disassembly is very inconvenient to use in daily life. In order to solve the problem of inability to disassemble after connection, most of them now use flange connection.

[0004] The so-called flange connection means that the end of the plastic pipe is flanged, and the flange is formed after flanging. The two interconnected flanges are connected by bolts, and lock nuts are provided at both ends of the bolts to realize The detachable connection of plastic pipes, however, is only bolted, and there is a gap at the junction of two adjacent plastic pipes, so the plastic pipes are prone to leakage when draining and venting

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