Sliding type aluminium plastic composite pipe fittings

Abstract

The invention relates to a pipeline connecting technique, in particular to a sliding compact type aluminum-plastic laminated pipe fitting, comprising a main pipe fitting body (1) provided with a pipe internal stay (10) on at least one end, an element rest (11) which is arranged at the outside diameter of the pipe internal stay (10) and is pressed into a port (31) of an aluminum-plastic laminated pipe (3) that is enlarged in a cold way when in installation, a ring-shaped sliding compact blocking sleeve (2) that is matched with the pipe internal stay (10) and can be sheathed into the external diameter of the aluminum-plastic laminated pipe (3) in a way of clearance fit, and a chamfer angle (20) is arranged at the port of the inner wall at the left end (29) of the sliding compact blocking sleeve (2) that is fixed at a part (30) of the aluminum-plastic laminated pipe (3) enlarged in a cold way after being installed. Compared with the prior art, the sliding compact type aluminum-plastic laminated pipe fitting has the advantages of small diameter shrinkage, even connection stress as well as better applicability and market prospect, and is suitable for being surface mounted and buried in a hiding way, so as to be safer and more reliable.

Description

technical field [0001] The invention relates to the field of pipe connection, in particular to the metal-plastic composite pipe connection technology. Background technique [0002] Aluminum-plastic composite pipe is a new type of pipe that has emerged in the past ten years. It has the advantages of metal pipes and plastic pipes, and has developed rapidly in our country. At present, aluminum-plastic composite pipes are mainly connected by threaded snap rings, such as "A Pipeline Joint for Aluminum-plastic Composite Pipes" with the authorized publication number CN 2499672Y, which uses a C-shaped ring squeezed between the joint body and the nut to make the C-shaped ring plastically deformed. Clamp the structure of the pipe; or use the clamp to connect, such as "A Clamp-type Plastic Pipe Fitting for Aluminum-plastic Composite Pipe" with the authorized announcement number CN 2510708Y, which has a pipe body that is inserted into the pipe port and is sleeved on the outer diameter o...

AI Technical Summary

Problems solved by technology

[0005] The invention aims at the defect that the existing pipe fittings are not suitable for sliding and tight connection of aluminum-plastic composite pipes, improves the structure of traditional pipe fittings, and designs aluminum-plastic composite pipe fittings suitable for sliding and tight connection.

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