Research Of Press-fitting Type Pipeline Mechanical Connector Sealing Performance And Installation Techniques

Pipelines especially in the oil and gas industry play an important role in shoulderingthe transportation of "industry blood", once these pipelines failure, will affect the wholeconveying system, pipeline leaks must take corresponding measures to repair it. Pipelinecompression mechanical connection is a relatively new pipeline connection technology, i thas the advantages of high sealing pressure, wide application range and convenient inoperation. The subject of this paper comes from the contract "pipeline of non-weldedconnection technology applied research" signed by the Offshore Oil Engineering Co., Ltd.and Harbin Engineering University Marine Intelligent Machinery Institute. Objectiving todevelop a press-fitting type pipeline mechanical connector and its installation tool, whichcan finish the pipeline fast reliable connection..This paper focuses on the working principle, composition and structure of thepress-fitting type pipeline mechanical connector and discusses the influences of the actualworking environment extrinsic factors on the connector sealing performance. With thelarge finite element analysis software of ANSYS to simulate connector installation process,preliminary verified the structural design of the mechanical connector satisfied the sealingrequirements, Then analyzed the influence of extrusion friction in the installation processon the entire installation process, including installation loading force, contact surfacemetal organizational performance and so on. On the basis of the above analysis, by theanalyzed of the design requirements of the press-fitting type pipeline mechanicalconnector installation tools and the working environment, this paper presents the designscheme of the installation tools. Designed the key structure of the installation tools andchecked them to ensure its rationality and reliability. The hydraulic power source isdesigned and the selection of hydraulic elements.Finally, through the installation tool loading tests to verify whether the installationtool design is reliable, then carried out a series of performance tests to verify the connectorsealing performance in accordance with the relevant norms.