A bimetal composite pipe bending test device

Abstract

The invention discloses a bimetallic composite pipe bending test device, which comprises a base on which a bending force loading mechanism, an axial force loading mechanism and a twisting force loading mechanism are installed, and a strain gauge is pasted on the outer wall of the bimetallic composite pipe to be tested. There is a camera inside the bimetallic composite pipe to be tested, the bimetallic composite pipe to be tested is located above the base, the torsional force loading mechanism is set in the middle of the bimetallic composite pipe to be tested, and the number of bending force loading mechanism and axial force loading mechanism is two , two axial force loading mechanisms are symmetrically arranged at both ends of the bimetallic composite pipe to be tested, two bending force loading mechanisms are symmetrically arranged on the left and right sides of the twisting force loading mechanism, and the bending force loading mechanisms are arranged on the two axial force loading mechanisms between. The invention can realize the loading of the upper and lower bending force, axial force and twisting force of the bimetallic composite pipe, and can perform a single force bending test or any combination of force bending tests, and can monitor the internal conditions of the bimetal composite pipe.

Description

technical field [0001] The invention relates to a bending test device, in particular to a bimetal composite pipe bending test device. Background technique [0002] In recent years, bimetallic composite pipes have been widely used in petroleum and chemical industries due to their excellent performance such as high pressure resistance and corrosion resistance. Due to its superior cost performance, bimetallic composite pipes have been widely used in land oil and gas exploration environments, and when pipelines are laid, they are equipped with corresponding pipe fittings, and the pipes have less or no bending. Therefore, bimetallic composite pipes are used in onshore petroleum The natural gas industry has a good application effect. With the exploitation of offshore oil and gas, bimetallic composite pipes have also begun to be used in the environment of offshore oil and gas exploitation. However, bimetallic composite pipes must meet certain bending properties when they are used ...

AI Technical Summary

Problems solved by technology

The test device has the following disadvantages: (1) It can only simulate the upward bending loading of the metal composite pipe, that is, it can only simulate the bending loading of the metal composite pipe in one direction, and cannot simulate the repeated bending and cyclic loading of the metal composite pipe in the up and down direction. Therefore, the test The device cannot obtain the bending resistance of the metal composite pipe under repeated bending and cyclic loading; (2) the two ends of the metal composite pipe cannot be loaded with axial force and twisting force when bending, but in the actual working environment, the metal composite pipe Bending is often accompanied by axial force or twisting force at both ends. Therefore, the test results of this test device cannot truly reflect the bending resistance of the metal composite pipe; (3) When the test is carried out, the test device can only collect Therefore, the test device cannot detect the integrity of the corrosion-resistant alloy layer lining the metal composite pipe during bending, and cannot obtain the inner lining of the metal composite pipe. Bending resistance of corrosion-resistant alloy layer

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