Calibration platform temperature and pressure alternating control system and control method

Abstract

The invention discloses a calibration platform temperature and pressure alternating control system and control method. The calibration platform temperature and pressure alternating control system and control method are applied to a deep in-situ fidelity coring "five-protection" capability calibration platform. The calibration platform temperature and pressure alternating control system is characterized in that temperature and pressure sensors are mounted on multiple monitoring points in a simulation cabin and a pipeline. Through an automatic data acquisition system and a computer technology, a reliable temperature and pressure control system is provided for the deep in-situ high-temperature and high-pressure environment simulation cabin while the safety of the high-temperature and high-pressure pipeline is ensured, and basic advanced research conditions can be provided for advanced exploration of deep in-situ rock mechanics and deep science. According to the calibration platform temperature and pressure alternating control method, when the cabin is heated and pressurized, the pressure-temperature-pore pressure coupling relation is fully considered, the implementation scheme idea of presetting the "five-protection" capability calibration environment is provided, and calibration environment presetting and control can be stably achieved.

Description

technical field [0001] The invention belongs to the technical field of in-situ environmental experiments, and in particular relates to the design of a temperature-pressure alternation control system and a control method for a calibration platform. Background technique [0002] Marching into the depths of the earth is an important direction for my country's scientific and technological innovation in the near future and in the future. At present, the mineral resources in the shallow part of the earth have been gradually exhausted, and resource development continues to move toward the deep part of the earth. The depth of coal mining has reached 1500m, the depth of geothermal mining has exceeded 3000m, the depth of metal ore mining has exceeded 4350m, and the depth of oil and gas resources has reached 7500m. normal. [0003] To ascertain the characteristics of deep rocks and provide strong support for deep exploration, it is necessary to restore the deep environment in the labo...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the existing temperature and pressure control device for restoring the in-situ environment experiment basically stays in the shallow rock mechanics experiment stage, and cannot correctly restore the in-situ environment of the rock. In order to solve the problem of errors in the actual situation, a constant temperature and pressure alternating control system and its control method are proposed, which can keep the temperature and pressure application process stable while ensuring that the fluid does not undergo phase change during the application of temperature and pressure environment. , to prevent the temperature and pressure environment from exceeding the single control limit due to the temperature and pressure coupling effect

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