Experimental device for damage and failure process of high temperature and high pressure components

Abstract

The invention relates to a high-temperature high-pressure part damage and failure process experimental device comprising a water injection device (3), a steam generation device (1), and a test piece heating and testing device (2) sequentially connected by using pipes. The device also comprises a pressure and temperature adjusting device (4) used for controlling the pressures and temperatures of the devices. The test piece heating and testing device (2) comprises, a covered sealed box with the layers of, from inside to outside, a thermal insulation material layer (202), a steel plate material layer (203), and a refractory layer (204). A loading device (209) is arranged on the box. The loading device is connected to the test piece (210) through a spring (208) penetrating an open hole on the top of the box and extending into the box. A resistor heating wire (206) is arranged in the box. A hole is provided on the bottom of the box. A weight hook (213) penetrates the hole. A weight (214) is suspended below the weight hook (213), and is positioned below the box. With the device provided by the invention, various working conditions of high-temperature high-pressure parts in boiler operation reality can be truly simulated, and the test piece can be subjected to full-process monitoring.

Description

technical field [0001] The invention relates to an experimental device for the damage and failure process of high-temperature and high-pressure components, in particular to an experimental device for the service life of high-temperature and high-pressure components and welded joints such as thermal power plant boilers, nuclear power plant pressure-heating pipelines, and chemical reactors. Background technique [0002] In the design of high-temperature superheaters and reheaters of modern large-capacity utility boilers, in order to make full use of metal materials to improve cycle efficiency, the design wall temperature of the heating surface in the furnace is very close to the allowable temperature limit of the metal, and the heating surface is also It is in a very high smoke temperature area, so the carbides are spheroidized, the oxide skin on the inner wall is peeled off and thinned, the durable strength is reduced, the creep speed is accelerated, and the defect expansion i...

AI Technical Summary

Problems solved by technology

Although this kind of experimental device is relatively simple, it is impossible to directly study the expansion process of defects under various actual operating conditions because the shape of the test piece, the environmental conditions, and the form of defects are very different from those in actual operation.

However, the field test research is very limited, the time is long, and the most dangerous heating surface is deep in the furnace, so it is difficult to directly test

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