Submicron-scale microfluidic experimental apparatus under high-temperature and high-pressure conditions and use method thereof

A submicron-scale microfluidic experimental apparatus under high-temperature and high-pressure conditions, comprising a heating and insulation jacket, an observation device chamber main body, a chamber main body upper pressure cover, a water circulation chamber, a microscopic observation port, a rotating bearing, a microchip, a microchip holder, a water circulation temperature detection and flow rate controller, a water-cooling device, a heating controller, and a microscope;

• wherein the heating and insulation jacket is wrapped around the observation device chamber main body;
• the chamber main body upper pressure cover is disposed above the observation device chamber main body;
• the water circulation chamber is sealingly disposed on the chamber main body upper pressure cover;
• the microscopic observation port is disposed above the water circulation chamber;
• the rotating bearing is disposed on an outer wall surface of the microscopic observation port and located inside the water circulation chamber;
• the microchip is disposed inside the microchip holder, and the microchip holder is sealingly disposed on a side surface of the observation device chamber main body;
• the water circulation temperature detection and flow rate controller is connected to a water-cooling circulation outlet of the water circulation chamber through a pipeline and connected to the rotating bearing through a wire;
• the water-cooling device is connected to the water circulation temperature detection and flow rate controller and a water-cooling circulation inlet of the water circulation chamber through pipelines;
• and the microscope is disposed above the microscopic observation port;
• wherein the microchip holder comprises a microchip fixing plate, a microchip clamping plate, and a connecting assembly;
• the microchip is placed on the microchip fixing plate, and the microchip fixing plate is fixedly connected to the microchip clamping plate;
• the connecting assembly is fixedly connected to the microchip clamping plate and is configured to sealingly assemble the microchip holder on the side surface of the observation device chamber main body;
• a displacement inlet and a displacement outlet are defined on the connecting assembly, and the displacement inlet and the displacement outlet are connected to the microchip placed on the microchip clamping plate through pipelines;
• and
• wherein a hydraulic oil through hole is defined on the microchip clamping plate;
• a confining pressure inlet and a confining pressure outlet are defined on the chamber main body upper pressure cover;
• the submicron-scale microfluidic experimental apparatus under the high-temperature and high-pressure conditions further comprises a confining pressure pump, and the confining pressure pump is connected to the confining pressure inlet through a pipeline.