Pipeline connecting pipe fitting

Abstract

A pipeline connecting pipe fitting comprises a nut, a joint, a joint external cone table and a connection pipe horn port and is characterized in that an inner cone hole is formed in the nut, a clamp sleeve for match usage is arranged in the inner cone hole of the nut, the clamp sleeve is provided with a hollow clamp sleeve hole, a clamp sleeve inner cone hole is formed in the bottom of the clamp sleeve hole and consists of a clamp sleeve inner cylinder hole and a clamp sleeve inner cone hole horn groove, the clamp sleeve inner cylinder hole is provided with a seal cone surface, a clamp sleeve hole wall and a clamp sleeve outer cone inclined surface form a clamp sleeve cone inclined angle, the joint outer cone table extrudes the seal cone surface to achieve cone surface sealing, the joint outer cone table extrudes the connection pipe horn port in the clamp sleeve inner cone hole horn groove to achieve horn groove sealing, and the nut inner cone hole extrudes the clamp sleeve to extrude a connection pipe to achieve clamp sleeve sealing. The pipeline connecting pipe fitting has the advantages that seal connection is convenient, seal process requirements are low, seal properties are high, the pipeline connecting pipe fitting can be applied to connection of low-hardness thin-wall metal pipes made of dissimilar materials and can be completely interchanged with connection nuts in the prior art.

Description

technical field [0001] The invention belongs to the industrial field, and relates to a connecting pipe fitting for connecting pipes into pipelines, in particular to a connecting pipe fitting for fluid transmission pipelines. Background technique [0002] The connections between pipes and pipes, pipes and other pipeline connection fittings include 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, convenient connection method, and can be used for low-hardness thin-walled metal pipelines, but there is a low sealing pressure. The disadvantage of poor sealing reliability can usually only be applied to pipeline connections with a sealing pressure lower than 8MPa. Flared fittings consist of a nut, a fitting with an outer cone, and some...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems existing in the above-mentioned flared connection method, without changing the outer conical structure of the existing connecting joint, and the specially provided pipeline connection pipe fittings completely solve the problems of the above-mentioned flared connection method. Problems: The connection sealing pressure is low, the reliability of the sealing performance is poor, it cannot prevent corrosion, the performance of anti-vibration and anti-loosening is low, and it cannot be directly used for the connection of pipelines between dissimilar metals.

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