Quick-slip inner and outer seal joints

Abstract

The invention relates to an inner-outer sealing joint capable of being tightened quickly in a sliding mode to solve the problems that according to existing pipe expanding, the connection and installation speed is low, and the sealing performance is poor. A base disk of a pipe fitting joint is forwards provided with an outer protruding pipe for outwards sleeving of a flared pipe head, and the periphery of the outer protruding pipe is provided with a plurality of annular slopes for preventing the flared pipe head from receding and disengaging. The outer protruding pipe is provided with a sliding-tightly sleeve for sleeving and fixing the periphery of the flared pipe head or a sliding-tightly sleeve for sleeving and fixing the periphery of the flared pipe head and abutting against the base disk. The inner periphery of the sliding-tightly sleeve is provided with a plurality of annular slopes for preventing the sliding-tightly sleeve from receding and disengaging from the flared pipe head. Elastic gaskets arranged on the periphery of the outer protruding pipe through one or more parallel outer annular grooves seal the inner periphery of the flared pipe head. The method for sliding tightly comprises the steps that firstly, the outer protruding pipe is pressed into the flared pipe head of an abutting pipe so that the front end of the flared pipe head can abut against the base disk; and secondly, the sliding-tightly sleeve of the sleeved abutting pipe slides to and abuts against the base disk. An annular step arranged between the base part of the outer protruding pipe and the front side of the base disk is in sealing fit with the inner periphery of the front end of the sliding-tightly sleeve through the elastic gaskets arranged in the outer annular groove. The inner-outer sealing joint has the advantages that connection and installation are convenient and quick, and the sealing performance is good.

Description

technical field [0001] The invention relates to a pipe joint, in particular to a fast sliding tight inner and outer sealing joint. Background technique [0002] Although the existing plastic pipes can obtain a better sealing effect when heated and connected, they do not meet the requirements of environmental protection because they can release pollutants. Although the existing PAP pipe does not release pollutants, meets the requirements of environmental protection, and has strong pressure resistance, it is easy to leak when the joint is pulled due to the troublesome method of expanding the pipe and poor tightness. Contents of the invention [0003] The purpose of the present invention is to overcome the above-mentioned defects of the prior art, and provide a fast sliding-tight internal and external sealing joint that is convenient and quick to assemble, and has good tightness performance. [0004] In order to achieve the above-mentioned purpose, the fast sliding tight int...

AI Technical Summary

Problems solved by technology

[0002] Although the existing plastic pipes can obtain a better sealing effect when heated and connected, they do not meet environmental protection requirements because they can release pollutants.

Although the existing PAP pipe does not release pollutants, meets the requirements of environmental protection, and has strong pressure resistance, it is easy to leak when the joint is pulled due to the troublesome expansion and connection method and poor tightness.

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