High and low temperature testing apparatus for mechanical test

Abstract

The invention relates to a high and low temperature testing apparatus for a mechanical test. The high and low temperature testing apparatus comprises an electric control system, a high and low temperature environment test box, a heating control system and a refrigeration control system. The electric control system is used for controlling the heating control system and the refrigeration control system, so as to enable the temperature in the box to be continuously and controllably changed; the high and low temperature environment test box comprises a stainless steel box body, a box door, a circulating fan, a thermocouple, a heating resistor, a liquid nitrogen access pipe, a thermal-insulating inserting block, a lighting facility, an inspection window and a dismountable defrosting device. The high and low temperature testing apparatus for the mechanical test disclosed by the invention can be combined with a mechanical tester to be used, so as to achieve a mechanical property test of the material at extreme temperature and realize accuracy control of the temperature; meanwhile, the high and low temperature testing apparatus is provided with the heating control system and the refrigeration control system; the apparatus can implement the high-temperature testing environment and the low-temperature testing environment and is convenient to test the influence of the temperature variation on the material mechanical properties; the high and low temperature testing apparatus is further provided with the inspection window, the defrosting device and the lighting facility, so as to observe the destruction process of the specimen during the high and low temperature testing processes.

Description

technical field [0001] The invention relates to a high and low temperature test device for mechanical tests, in particular to a high and low temperature test device for testing mechanical properties across large temperature differences. Background technique [0002] In order to understand the characteristics of some materials in extreme environments, it is often necessary to test their mechanical properties in high or low temperature environments, and sometimes it is necessary to study the mechanical properties of materials in the continuous temperature range from ultra-low temperature to high temperature. At present, many researchers have developed a variety of high-temperature or low-temperature test chambers, which can realize high-temperature or low-temperature environments alone. Among them, the realization of low-temperature environments mostly uses compressor refrigeration. Due to the limitation of factors, it is difficult to achieve ultra-low temperature, and the low...

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Problems solved by technology

At present, many researchers have developed a variety of high-temperature or low-temperature test chambers, which can realize high-temperature or low-temperature environments alone. Among them, the realization of low-temperature environments mostly uses compressor refrigeration. Due to the limitation of factors, it is difficult to achieve ultra-low temperature, and the lowest temperature can only reach about -150°C, which cannot meet the requirements of lower and lower test temperatures, and it is difficult for existing environmental test chambers to operate in the range of extremely low temperature to high temperature. Continuous temperature control

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