Pipe connecting pipe fitting

Abstract

A pipe connecting pipe fitting comprises a nut, a joint, an external frustum of the joint and a horn mouth of a connecting pipe. The pipe connecting pipe fitting is characterized in that an inner taper hole is formed in the nut, a clamping sleeve used in cooperation is arranged in the inner taper hole of the nut, the clamping sleeve is provided with a hollow clamping sleeve hole, an inner taper hole of the clamping sleeve is formed in the bottom of the clamping sleeve hole, the inner taper hole of the clamping sleeve is composed of an inner cylindrical hole of the clamping sleeve and a horn groove of the inner taper hole of the clamping sleeve, the wall of the clamping sleeve hole and the external taper bevel of the clamping sleeve form a taper angle of the clamping sleeve, the external frustum of the joint extrudes the inner cylindrical hole of the clamping sleeve to achieve taper face sealing, the external frustum of the joint extrudes the horn mouth of the connecting pipe in the horn groove of the inner taper hole of the clamping sleeve to achieve horn groove sealing, and the inner taper hole of the nut extrudes the clamping sleeve so as to extrude the connecting pipe to achieve clamping sleeve sealing. The pipe connecting pipe fitting has the advantages that sealing connection is convenient and fast to operate, the sealing technological requirements are low, the sealing performance is high, and the pipe connecting pipe fitting can be used for connecting low-hardness thin-wall metal pipelines made of different materials and can be totally interchangeable with a connecting nut 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 this invention is to solve the problems of the above-mentioned flared connection, and to provide a specially provided Pipeline connection pipe fittings completely solve the problems existing in the above-mentioned expansion bell mouth connection method: 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 pipelines between dissimilar metals connection problem

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