Pipeline connecting structure suitable for pipeline positive and negative pressure transportation

Abstract

The invention discloses a pipeline connecting structure suitable for pipeline positive and negative pressure transportation. The pipeline connecting structure comprises pipe fittings, and annular convex shoulders are arranged at the connecting ends of the pipe fittings; and the pipeline connecting structure further comprises a fixing ring, pressing rings, sealing rings and a gland, wherein mounting grooves are formed in the upper end and the lower end of the fixing ring, the connecting ends of the pipe fittings are inserted into the fixing ring, the pressing rings are arranged between the annular convex shoulders and on the upper end face and the lower end face of the fixing ring, the end faces of the pressing rings and the end faces of the mounting grooves define sealing grooves, the sealing rings are arranged in the sealing grooves, a plurality of sealing side faces are arranged on each sealing ring, the sealing side faces are arranged opposite all the side faces of the sealing grooves and the outer side faces of the pipe fittings correspondingly, sealing protruding strips are arranged on the side faces of the sealing rings, the sealing protruding strips make contact with all the side faces of the sealing grooves and the outer side faces of the pipe fittings to form sealing faces, and the gland is buckled and fixed on the outer side surface of the fixing ring. The pipeline connecting structure is simple in structure and convenient to mount, and the sealing faces do not make direct contact with a pipeline medium, so that the service life of the pipeline connecting structure is prolonged, and the mounting and maintenance cost of the pipeline connecting structure is reduced.

Description

technical field [0001] The invention relates to the technical field of pipelines, in particular to a pipeline connection structure suitable for pipeline positive and negative pressure transportation. Background technique [0002] Pipeline transportation is a long-distance transportation method of transporting liquid and gas materials using pipelines as a means of transportation. It is a transportation method that specifically transports petroleum, coal and chemical products from the production site to the market. It is the backbone of the unified transportation network. special components. [0003] The common transportation methods of pipeline transportation include positive pressure transportation and negative pressure transportation. Drive the material movement; while the negative pressure conveying system is driven by the negative pressure formed by the air induction device at the end of the conveying system and the external pressure difference, so that the external air ...

AI Technical Summary

Problems solved by technology

[0010] The technical problem to be solved by the present invention is that existing pipeline structures suitable for positive and negative pressures have complex structures, high production costs and short service life.

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