Process method for connecting metal-extrusion type pipe fitting with high infiltration prevention

Abstract

The invention discloses a process method for connecting a metal-extrusion type pipe fitting with high infiltration prevention and relates to a construction method for connecting the metal-extrusion type pipe fitting. The process method for connection comprises the following steps of: preparing a metal-extrusion socket type pipe fitting; arranging a circumferential convex ring at a socket mouth to form a groove; placing an elastic sealing member in the groove; uniformly coating a prepared adhesive sealing glue to the circumferential surface of an inner cylinder body at the socket mouth pipe fitting joint by using a coating device or a brush; inserting a pipe, of which a pipe mouth is cleaned, into the socket mouth pipe fitting of the pipe, wherein the pipe is inserted into the depth of a limitation joint of the socket mouth; and inserting an outer wall of the pipe into a gap of an inner wall of the socket mouth of the pipe fitting, wherein the gap is between 0.1mm and 0.3mm. A jaw mould matched with the joint of the pipe is arranged by a joint clamping tool; the joint of the pipe is placed into the jaw; double or multiple paths of compressed rings are pressed by cylinder bodies on two sides of the convex ring of the sealing member; and the socket mouth of the pipe and a sub-lock of the pipe are fixed integrally. The defects of pure elastic sealing or pure rigid sealing are overcome, so that the pipeline is reliably connected and the anti-damage capability is stronger; and therefore, the process method is a powerful sealing type method for the joint of the pipe with high pressure resistance and high security.

Description

technical field [0001] The invention relates to a construction method for connecting metal extruded pipe fittings. Background technique [0002] At present, there are many kinds of metal extruded pipe fittings, such as the patent ZL01226033.9 metal extruded pipe joint is a metal pipe fitting socket equipped with O-shaped elastic seals. After the pipe is inserted, it is simultaneously extruded on both sides of the O-shaped seal. The pipe joint connection method with double ring locking. Its disadvantage is only one elastic seal. The impermeability and reliability of the air seal are insufficient. When the only one seal fails, there is no subsequent protective measure and a rigid seal is lacking. PCT / JP89100667 has only a single locking ring, which has poor firmness. PCT / AV98100601 adopts an elastic sealant cylinder, which is sleeved on the pipe, and another pipe whose inner wall diameter is larger than the outer diameter of the elastic sealant cylinder is inserted into th...

AI Technical Summary

Problems solved by technology

Defects When the rubber is broken at the crimping ring, it will affect the seal. The crimping depth is not enough to form elastic sliding. When the pulling force increases, the rubber seal will be broken, and the crimping will not be firm and unstable. The above invention is squeezed Pipe joints, there are problems with the reliability of the connection

[0003] If a simple socket bonding connection is adopted, the pipeline cannot be put into use before the glue is cured, and it will be pulled out under the action of gas or water pressure, which cannot be used for emergency repair and maintenance of the project

Simple bonding, after a large number of metal piping systems are used, because the piping system is subject to changes in thermal expansion and contraction of air temperature, the expansion coefficient of the interface material is very different, and the failure of the bonding layer often occurs at different times under stress. Seasonal leakage, proven by a large number of projects, insufficient reliability

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