Erosion experiment elbow pipe for configuring negative electrode protective devices

Abstract

The invention relates to an erosion experiment elbow pipe for configuring negative electrode protective devices. The erosion experiment elbow pipe comprises a detachable elbow pipe outer arch, a detachable elbow pipe inner arch, hoops, a platinum electrode, a reference electrode, an electrochemical workstation, experiment test pieces, screws, nuts, single-component room-temperature curing siliconerubber and connecting lines. The screws and the test pieces are screwed down at first, the screws penetrate small holes in an elbow and are fixed by the aid of the nuts, gaps between test piece grooves and the small holes are filled with the silicone rubber, and the elbow pipe outer arch and the elbow pipe inner arch are hermetically adhered with each other by the silicone rubber and are fixed bythe aid of the hoops; the ends of straight transverse grooves of the screws, the platinum electrode and the reference electrode are connected into the electrochemical workstation by the connecting lines, and negative electrode protection can be provided to all the test pieces by the electrochemical workstation. Actual erosion rates of various positions of the elbow pipe can be quantified by the aid of weight loss methods, and experiment results can be prevented from being affected by corrosion in erosion procedures. Compared with existing erosion experiment elbow pipes, the erosion experimentelbow pipe has the advantages of compact structure, large quantity of comprehensive test points, few errors and the like. Besides, the erosion experiment elbow pipe is wide in application range.

Description

Technical field: [0001] The invention discloses an erosion experimental elbow equipped with a cathodic protection device, in particular to an experimental elbow used for studying the erosion of the elbow by two-phase flow or multi-phase flow under experimental conditions. Background technique: [0002] Erosion is a phenomenon in which metal material is lost due to mechanical movement between a metal surface and a single-phase fluid or a fluid carrying solid particles. Erosion widely exists in mining, metallurgy, water conservancy, petrochemical and other industrial processes. Various types of equipment and facilities exposed to moving fluids, such as pipelines, pipe fittings, valves, pumps, etc., will suffer from different degrees of erosion damage. [0003] In the two-phase flow or multi-phase flow containing solid particles, the erosion damage is very serious, which will greatly shorten the life of the equipment. For example, the crude oil exported from the downhole has ...

AI Technical Summary

Problems solved by technology

The device has the following problems during use: first, the inhomogeneity of the slurry density in the kettle will cause errors in the experimental results; The third is that the samples used are treated according to uniform erosion, which is different from the erosion at the elbow, so this device has little significance for the research on the erosion of the elbow.

However, the device has the following problems during use: First, the device is divided into upper and lower parts, and the gap in the middle will affect the fluid flow state, thereby affecting the erosion of the coupons; hard to prevent

In order to overcome the defects of the prior art, the present invention proposes an erosion test elbow equipped with a cathodic protection device, which can not only avoid the corrosion phenomenon of the test piece during the erosion experiment, but also quantify the erosion rate of specific parts of the elbow, Identify the most severely eroded parts of the elbow to optimize the design of the elbow and reduce the risk of erosion

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