Sliding-compact-type pipe fitting for aluminum-plastic pipe

Abstract

The invention relates to a connection pipe structure of an aluminum-plastic pipe, in particular to a sliding-compact-type pipe fitting for an aluminum-plastic pipe. The sliding-compact-type pipe fitting for the aluminum-plastic pipe comprises a pipe fitting body provided with at least an end inner support and a sliding-tight clamping sleeve which is in a ring-shaped structure and matched with the pipe inner support, wherein more than two protruding ribs are arranged on the external diameter of the pipe inner support. A ring-shaped structure matched with the pipe inner support is sleeved in a sliding-compact and clamping mode. At, a ring-shaped sealing ring is arranged on the external diameter of the pipe inner support of the pipe fitting main body and located among the protruding ribs. A chamfer is arranged in an end port of the inner diameter of one end where the sliding-tight clamping sleeve slides in. The sliding-tight clamping sleeve is arranged and then fixed on a cold expansion port part where the aluminum-plastic pipe passes. The sealing ring is contacted with the inner wall of the aluminum-plastic pipe. Compared with an existing pipe fitting, the sliding-compact-type pipe fitting for the aluminum-plastic pipe applies a sealing ring technology, the defect that the aluminum-plastic pipe is not good in memory in sliding-compact pipe fitting installation is remedied, amount of compression in the structure is increased, sealing performance is strengthened, and requirement of size is widened.

Description

technical field [0001] The invention relates to the field of pipe connection, in particular to the structure of connecting pipe fittings for aluminum-plastic pipes. Background technique [0002] Aluminum-plastic pipes are widely used in the fields of building water supply and heating. At present, the domestic connection method of aluminum-plastic pipes has a threaded snap ring connection structure, such as "A Kind of Aluminum-plastic Composite Pipe Joint" with the authorized publication number CN2499672Y; Practical clamp-type plastic pipe fittings", and a new type of sliding tight connection structure, such as the authorized announcement number of our company is CN101430035 "Sliding tight aluminum-plastic composite pipe fittings". During the connection process of sliding tight connection pipe fittings, first insert the ring-shaped ferrule into the aluminum-plastic pipe, then use professional tools to expand the port of the aluminum-plastic pipe to insert the pipe fitting bo...

AI Technical Summary

Problems solved by technology

There is an aluminum layer in the middle layer of the aluminum-plastic pipe, which has the characteristics of some metal pipes, and the discontinuity of the pipe layer leads to a large difference in performance between the pipe and the pure plastic pipe. The wall thickness of the plastic layer of the aluminum-plastic pipe is small, and the sliding tightness and pullout resistance Different from the fittings of pure plastic pipes, it also leads to a large difference in the fittings

[0004] The existing sliding-tight aluminum-plastic composite pipe fittings have poor pipe memory and no efficient sealing structure, so the size control is strict and the cost is high; Dimensions are controlled differently and cannot be used universally; in addition, the requirements for pipeline installation are strict, and installation workers are prone to leaks in the case of irregular installation

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