Transfer and online detection system for deep-sea sediment samples and application method thereof

An application method of a transfer and online detection system for deep-sea sediment samples, comprising the following steps:

• cooling seawater:
• filling a water storage tank with the seawater, starting up a primary-efficiency cooling unit, setting a target temperature to 8° C., shutting down a primary-efficiency cooling unit when a temperature of the seawater drops to the target temperature, starting up a high-efficiency cooling unit, and setting the target temperature to 3° C.;
• installing a sampling drill:
• installing the sampling drill in a pressure-retaining drill disengaging device, clamping an inner barrel joint of the sampling drill by second clamps, holding tightly an inner barrel of the sampling drill by a disengaging slide sleeve, and connecting the pressure-retaining drill disengaging device with a high-pressure ball valve via a fourth hoop;
• conducting exhausting and pressurizing for the transfer and online detection system:
• opening all water inlet ball valves and exhaust port ball valves as well as the high-pressure ball valve to ensure communication within the transfer and online detection system;
• starting up a seawater booster pump to inject the seawater into the transfer and online detection system, and observing a venting condition of an exhaust display device;
• shutting down the seawater booster pump after the seawater is discharged through all exhaust ports, and starting up a pneumatic booster pump to repeatedly open and close the exhaust port ball valves multiple times until bubbles flow out;
• closing the exhaust port ball valves, such that a pressure within the transfer and online detection system begins to rise, observing reading on all pressure gages and shutting down the pneumatic booster pump to allow the transfer and online detection system enter a pressure maintaining state when the pressure within the transfer and online detection system pressure rise to a predetermining value;
• disengaging the sampling drill from the inner barrel:
• rotating a worm with a worm handle to a predetermined number of turns, and observing through the visible window, whether the inner barrel joint and the inner barrel of the sampling drill are disengaged;
• gripping a core:
• starting up a first motor to drive a gripper to move forwards so as to contact and grab the core;
• and reversely rotating the first motor to pull the core out of the sampling drill to a sample segment cutting device;
• cutting the core:
• rotating a clamping handwheel on the sample segment cutting device to drive first clamps to clamp the core, then starting up a second motor and a third motor to cut the core, resetting the second motor and the third motor after cutting is finished, and reversely rotating the clamping handwheel to reset the first clamps;
• and
• subpackaging core samples:
• closing the high-pressure ball valve to release pressure in the disengaging device, and then detaching the pressure-retaining drill disengaging device from the transfer and online detection system;
• connecting a subsample pressure-retaining storage cylinder with the transfer and online detection system to exhaust and pressurize the subsample pressure-retaining storage cylinder until a balance between the pressure in the subsample pressure-retaining storage cylinder and a pressure in the transfer and online detection system is reached, and opening the high-pressure ball valve;
• starting up the first motor to push the core samples cut into the subsample storage pressure-retaining cylinder, and closing ball valves on the subsample pressure-retaining storage cylinder and the high-pressure ball valve on the transfer and online detection system, and detaching the subsample pressure-retaining storage cylinder from the transfer and online detection system;
• and installing a new subsample pressure-retaining storage cylinder, and performing a new cycle of core cutting and storage by repeated operations of exhausting and pressurizing.