Clip-press type pipefitting

Abstract

This invention provides a clamping tube element including a joint and a clamping cover, in which the joint includes an end and a core, the radial section of the end is greater than the core, said clamping cover is sleeved on the outer circle of the core and a connection structure is set between one end of the cover and the joint end, the joint is made of plastics.

Description

technical field [0001] The invention belongs to the technical field of pipe fittings for pipe material connection, and in particular relates to a clamping type pipe fitting. technical background [0002] Existing compression-type pipe fittings are often used for the connection of aluminum-plastic composite pipes, which mainly include a joint body, a plastic retaining ring, a clamping sleeve and a sealing ring. [0003] The main disadvantage of the prior art is that the joint body is made of copper metal and the clamping sleeve is made of stainless steel. In order to avoid the aluminum layer of the pipe from contacting the metal body or the stainless steel clamping sleeve, a plastic retaining ring or protective sleeve must be added to prevent dissimilar metals from collapsing. Therefore, the structure of the pipe fittings is complicated and the installation requirements are high; and in application, it is difficult to ensure the stability between the joint body, the clamping ...

AI Technical Summary

Problems solved by technology

[0003] The main disadvantage of the prior art is that the joint body is made of copper metal and the clamping sleeve is made of stainless steel. In order to avoid the aluminum layer of the pipe from contacting the metal body or the stainless steel clamping sleeve, a plastic retaining ring or protective sleeve must be added to prevent dissimilar metals from collapsing. Therefore, the structure of the pipe fittings is complicated and the installation requirements are high; and in application, it is difficult to ensure the stability between the joint body, the clamping sleeve, the plastic retaining ring and the connecting pipe, that is, the integrity is not strong and it is easy to loosen

[0004] In order to overcome the defect of poor integrity, the existing pipe fittings prevent loosening between the parts of the pipe fittings by setting stop ring knurling on the joint body, but due to process limitations, the knurling depth is limited, and it is difficult to achieve the anti-rotation effect , and there is no direct anti-rotation and anti-loosening mechanism between the clamping sleeve and the joint body, it is easy to produce radial rotation during installation, and it is easy to cause leakage after rotation

[0005] In addition, the joint body of the existing compression-type pipe fittings is provided with a plurality of zigzag ring grooves, so that when the pipes are connected, the front angle of the zigzag ring grooves of the metal material has an axial pulling force, which is likely to cause scratches on the inner layer of the pipes, which is easy to cause Leakage reduces the strength of the pipe

[0006] Moreover, the existing clamping sleeve should reserve an observation hole for observing whether the pipe is inserted into the limit during the installation process of the pipe connection, which not only makes the structure of the clamping sleeve complex, but also brings inconvenience to installation

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