Clamping sleeve type straight-through external screw joint

Abstract

The invention discloses a clamping sleeve type straight-through external screw joint. The external screw joint comprises a joint body, a nut and a clamping sleeve pipe, wherein threads are arranged onthe outer sides of the left end and the right end of the joint body respectively; an O-shaped groove is formed in the middle part of the joint body, and an O-shaped sealing ring matched with the O-shaped groove is arranged in the O-shaped groove; a front clamping sleeve is arranged between the joint body and the clamping sleeve, and the front clamping sleeve, the joint body and the clamping sleeve are tightly attached to form a main seal; and a rear clamping sleeve is arranged at the rear end of the front clamping sleeve, a fixed hinge point is arranged at the end, connected to the front clamping sleeve, of the rear clamping sleeve, and an expansion sealing part is arranged between the front clamping sleeve and the rear clamping sleeve. According to the external screw joint, an expansionsealing element and the O-shaped sealing ring are arranged, so that the phenomenon of loosening of clamping sleeve during high-pressure bearing is avoided, leakage is avoided, and installation is easy; and the double-clamping sleeve is arranged, the rear end of the front clamping sleeve is provided with the rear clamping sleeve with the hinge clamping effect so that the anti-leakage clamping sleeve can be further firmly installed and connected.

Description

technical field [0001] The invention relates to the technical field of pipe connection fittings, in particular to a ferrule-type straight-through external screw joint. Background technique [0002] With the continuous improvement of modernization, pipe fittings are becoming more and more popular and widely used in various fields. The main body of the pipeline requires various joints, but the joints currently on the market have problems in terms of environmental protection and energy saving, light weight and rigidity, and curved elastic no-leak point socket connections. After the appearance, the ferrule loosened and further research and development were needed. [0003] Therefore, in the prior art, there are problems in terms of environmental protection and energy saving, light weight and rigidity, curved elastic no-leak point socket connection, etc., and the anti-leakage tube cannot be firmly installed and connected, and the rear ferrule loosens when it is subjected to high...

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Problems solved by technology

[0004] Purpose of the invention: Aiming at the defects and insufficiencies of the prior art, solve the problems of environmental protection and energy saving, light weight and rigidity, curved elastic no-leak point socket connection, etc., the anti-leakage tube cannot be firmly installed and connected, and when it is subjected to high pressure After problems such as ferrule loosening occurred, the applicant designed a ferrule-type straight-through external screw joint after many practice improvements.

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