A kind of cyclic oxidation experiment device controlled by crank-slider mechanism and oxidation performance test method

Abstract

The invention provides a circulating oxidization experiment device controlled by a crank slide block mechanism and an oxidization performance testing method. The circulating oxidization experiment device comprises the crank slide block mechanism, a bracket base and a sample tray arranged on the bracket base, wherein the bracket base is provided with an electric driving guide rod capable of driving the sample tray to enter a heating furnace; a crank of the crank slide block mechanism is connected with a steel rod and a furnace door of the heating furnace in sequence; a connection rod penetrates through the bracket base to be hinged with a slide block; the hinged part of the connection rod and the crank is connected with a rack by an elastic piece; the control system is composed of a temperature control unit and a time circulating control unit; the electric driving guide rod drives a sample bracket base to vertically move in and out of the heating furnace; and the slide block is driven to move upwards or downwards under the common effect of the bracket base and the spring, so that the opening and closing of the furnace door of the heating furnace are realized. The circulating oxidization experiment device can be used for automatically controlling and simulating a high temperature-low temprature oxidization alternative environment and the time is saved.

Description

Technical field [0001] The invention relates to a cyclic oxidation experiment device and an oxidation performance test method, in particular to a cyclic oxidation experiment device and an oxidation performance test method controlled by a crank slider mechanism. Background technique [0002] In the existing ultra-supercritical power plant units, the superheater / reheater is a key component of the boiler, and the working environment is extremely harsh. The inner wall of the tube is corroded by high-temperature steam for a long time, and it is easy to form an oxide film. Since these oxide films have a smaller thermal expansion coefficient than the base alloy (mostly ferritic / martensitic steel or austenitic steel), they are easy to withstand large thermal stress (usually compressive stress) when the boiler changes load or starts and stops. ) And peeling occurs. A lot of practice has shown that tube burst caused by oxide film peeling is one of the main reasons for the failure of 600℃ ...

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that it is cumbersome, and each cycle requires the participation of experimenters, which is time-consuming and laborious.

However, the existing thermogravimetric analyzers, heating furnaces, etc. do not have the function of automatic hot-cold cycle oxidation

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