Ultrahigh molecular weight polyethylene steel lining pipe joint

Abstract

The invention discloses an ultrahigh molecular weight polyethylene steel lining pipe joint. The ultrahigh molecular weight polyethylene steel lining pipe joint comprises joint inner cores, joint outer cores, an O-shaped sealing ring, a joint clamping groove, a quick hoop and a locking bolt. The joint inner core I and the joint inner core II are respectively arranged on two ends of butt joint surfaces of a pipe I and a pipe II, and are positioned in inner cavities of the pipes; a flange I and a flange II are respectively arranged at the ends of corresponding two butt joint surfaces of the joint inner core I and the joint inner core II; and the butt joint surfaces of the two flanges are matched with each other. The joint outer core I and the joint outer core II are respectively arranged on the outer walls of the two ends of the butt joint surfaces of a steel pipe I and a steel pipe II; and the joint outer core I, the joint outer core II, the joint inner core I and the joint inner core II adopt convex-concave socket connecting structures. The pipe joint is an ultrahigh molecular weight polyethylene steel lining pipe joint with strong corrosion resistance, reliable connection and long service life.

Description

technical field [0001] The invention relates to an ultra-high molecular weight polyethylene steel liner joint, which belongs to the technical field of pipeline connectors and is mainly used for petroleum and chemical transportation pipelines. Background technique [0002] In order to realize the green transportation of petroleum and chemical transportation pipelines, more stringent technical requirements are put forward for the wear resistance and corrosion resistance, sealing performance and reliability of pipe joints. Although there are many types of pipe joint structures designed in the prior art, especially steel-lined pipe joint structures, they all have the following disadvantages to varying degrees: 1. The existing pipe joints have poor ring rigidity and poor tensile yield strength 1. The disadvantage of low pressure bearing capacity cannot meet the requirements of pipelines with high pressure; 2. Due to the change of ambient temperature, the pipe joints will expand ...

AI Technical Summary

Problems solved by technology

Although there are many types of pipe joint structures designed in the prior art, especially steel-lined pipe joint structures, they all have the following disadvantages to varying degrees: 1. The existing pipe joints have poor ring rigidity and poor tensile yield strength 1. The disadvantage of low pressure bearing capacity cannot meet the requirements of pipelines with high pressure; 2. Due to the change of ambient temperature, the pipe joints will expand with heat and contract with cold, resulting in loose bolts and poor sealing performance of the pipe body connection, resulting in pipeline leakage and transportation The system cannot run safely and reliably; 3. The existing steel-lined pipe joints cannot well solve the problem of negative pressure resistance of the pipes

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