Petroleum pipeline flange connection structure

Abstract

The invention provides a petroleum pipeline flange connection structure which comprises a connection flange, a connection pipeline, a connection bend, a bolt, a nut, a compensation mat and a connected pipeline. The compensation mat is installed in a groove. The compensation mat is of a circular structure. A center hole is formed in the center of the compensation mat. Positioning grooves are formed in the circumference of the compensation mat. The number of the positioning grooves is the same as that of connection holes in the connection flange. The bolt penetrates through the connection holes in the connection flange and the positioning grooves in sequence to be connected with the nut. The diameter of the positioning grooves is larger than that of the bolt. One end of the connection pipeline is connected with the connection bend. By means of the petroleum pipeline flange connection structure, stress produced by a petroleum pipeline in the connection process can be reduced, free compensation of each pipeline axial line can be achieved on the premise of ensuring tight connection, the pipeline weak portion is prevented from being cracked, and the pipeline leakage phenomenon is avoided.

Description

technical field [0001] The invention relates to an oil pipeline connection device, in particular to an oil pipeline flange connection structure. Background technique [0002] In the process of erecting oil pipelines, due to the long distance of pipeline laying and the need to turn at different angles during the connection process, the number of connection points of the entire pipeline increases. In the connection process, welding connections and threaded structure connections are usually used. , Flange structure connection; although the welding connection method is simple and fast, the connection cannot be disassembled. In the field construction process, the weld joint needs to be inspected for flaw detection. Due to the limitations of equipment and site, the work efficiency is low; although the threaded connection is simple in structure, However, the connection accuracy is high, and at the same time it cannot withstand large pressure, and the processing accuracy of the thre...

AI Technical Summary

Problems solved by technology

[0002] In the process of erecting oil pipelines, due to the long distance of pipeline laying and the need to turn at different angles during the connection process, the number of connection points of the entire pipeline increases. In the connection process, welding connections and threaded structure connections are usually used. , Flange structure connection; although the welding connection method is simple and fast, the connection cannot be disassembled. In the field construction process, the weld joint needs to be inspected for flaw detection. Due to the limitations of equipment and site, the work efficiency is low; although the threaded connection is simple in structure, However, the connection accuracy is high, and at the same time it cannot withstand large pressure, and the processing accuracy of the thread is high, so it is not suitable for large pipe diameter connections; although the flange connection structure is convenient to connect and has a large pressure bearing capacity, due to the The caliber is large, the connection distance is long, and the axis of each section of the pipeline is not on the same axis, resulting in stress between the pipelines after each section of the pipeline is connected. Long-term practical use often leads to cracking at the weak point of the pipeline, resulting in leakage of the pipeline Phenomenon

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