Pipeline connection pipe fitting

Abstract

A pipeline connection pipe fitting comprises a nut, a connector outer frustum and a connection pipe horn mouth. The pipeline connection pipe fitting is characterized in that the nut is provided with an inner taper hole, a taper sleeve is arranged in the nut inner taper hole and is a hollow taper sleeve hole, a taper sleeve inner taper hole is arranged at the bottom of the taper sleeve hole, a horn groove is arranged on the taper sleeve inner taper hole, and a taper sleeve taper oblique angle is formed by the taper sleeve hole wall and the taper sleeve outer taper oblique surface. The connector outer frustum extrudes the horn mouth and the taper sleeve inner taper hole, and extrudes the taper sleeve taper oblique angle to the position between the nut inner taper hole and a connection pipe to achieve sealing of the connection pipe and metal hard sealing between the connector outer frustum and the taper sleeve inner taper hole, and the connection pipe horn mouth is extruded to the position between the connector outer frustum and the horn groove to achieve sealing of the horn groove. The pipeline connection pipe fitting has the advantages of being convenient in sealing connection, low in requirement for sealing process, high in sealing performance, adaptive to connection of pipes made from heterogeneous materials and completely interchangeable with a connection nut in the prior art.

Description

technical field [0001] The invention belongs to the field of mechanical manufacturing, and only relates to a connecting pipe fitting for connecting pipes into a pipeline, in particular, only relates to a connecting pipe fitting for a fluid transmission pipeline. Background technique [0002] The connection between pipe and pipe, pipe and other pipeline connectors includes welding connection, thread connection, flange connection, bell mouth connection, ferrule type pipe joint connection and other methods. Among them, flared connection, also known as flared connection and flanging connection, has the advantages of connection process requirements, low connection cost and convenient connection method, but the sealing pressure is low and the sealing reliability is poor, usually only used in sealing Connect to pipelines with pressure lower than 8MPa. Flare fittings usually consist of a nut, a fitting with an outer cone, and sometimes a bushing. The sealing principle of the expa...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of the above-mentioned flared connection. On the basis of the flared connection, without changing the structure of the existing connection However, the specially provided pipeline connection fittings completely solve the problems of the above-mentioned flared connection method: low connection sealing pressure, poor sealing performance, no corrosion resistance, low vibration and looseness resistance, and cannot be directly used for Problems with piping connections between dissimilar metals

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