Bending moment resist flange plate for petroleum pipeline

Abstract

The invention belongs to the technical field of connecting devices, and particularly discloses a bending moment resist flange plate for a petroleum pipeline. The bending moment resist flange plate comprises a base body, bolt holes and waist type holes. A set of bolt holes are formed in the circumference of the base body, and two waist type holes are formed between every two bolt holes. A compression mechanism is arranged between the two adjacent waist type holes, the compression mechanism is used for dispersing the pressure of a steel strand on the base body, when anchor-pulling is performed through the two waist-shaped holes, the steel strand exerts great pressure on the base body between the two waist type holes, on the one hand, the pressure can be relieved by arranging the compressionmechanism, on the other hand, the pressure can be converted into the sealing force of a flange through the compression mechanism, and the sealing performance of a butt flange is improved. The bendingmoment resist flange plate for the petroleum pipeline is especially applicable to the connection between pipelines which need to be buried and can apply prestress to the pipelines and joints of pipelines, a soil layer is overlaid above the pipelines after being applied with prestress, and the weight of the soil layer is balanced with the applied prestress, so that the stress of the pipelines is balanced and the service life of the pipeline is prolonged.

Description

technical field [0001] The invention belongs to the technical field of connection devices, in particular to a moment-resistant flange used for oil pipelines. Background technique [0002] Flange is otherwise known as flange flange or flange. Flanges are parts that are connected to each other between pipes and are used for connection between pipe ends; they are also useful for flanges on equipment inlets and outlets, And can be used as connection between two equipments, example reducer flanges. Flange connection or flange joint refers back to the detachable connection of flange, Gasket and bolt as a team of combined sealing structure. Pipe flange refers back to the flange used for piping in the pipeline installation, And used on the equipment refers to the inlet and outlet flange of the equipment. There are holes in the flange, and the bolts tightly connect the two flanges. The flanges are sealed with gaskets. Flanges are divided into threaded (screw connection) flanges, ...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, for some oil pipelines buried in the ground, when these pipelines are connected by flanges, the corresponding supporting force at their joints is relatively weak, and the weight of the covering above the pipelines exerts a large bending moment on the pipelines , so that the connection of the pipeline is easily bent or broken under the action of the bending moment, causing the pipeline to leak

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