Pressure-regulating and pressure-retaining system for pressure-retained transferring of deep-sea sediments and control method of pressure-regulating and pressure-retaining system

Abstract

The invention relates to the technical field of hydraulic transmission and aims to provide a pressure-regulating and pressure-retaining system for pressure-retained transferring of deep-sea sediments and a control method of the pressure-regulating and pressure-retaining system. The pressure-regulating and pressure-retaining system for pressure-retained transferring of the deep-sea sediments comprises a low-pressure pump, a high-pressure pump, check valves, filters, pressure sensors, stop valves, an energy accumulator and a proportional overflow valve. The control method is used for realizing a pressure-retained transferring process of a pressure-retained transferring device and comprises the processes of a pressurizing and pressure-retaining process of the pressure-retained transferring device, a pressurizing and pressure-retaining process of a subsample transferring cylinder, and a process of mounting a communicating vessel between ball valves I and II and pressurizing. According to the pressure-regulating and pressure-retaining system, a deep-sea environment at any depth can be simulated within a specialized range, the pressure in a deep-sea sediment sampler can be measured through the pressure sensor I and the overflow pressure of the pressure-retained transferring device can be automatically adjusted, so that the pressure in the pressure-retained transferring device and the pressure in the sampler are consistent and the purpose of pressure retaining is achieved.

Description

technical field [0001] The invention relates to the technical field of hydraulic transmission, in particular to a pressure regulating and maintaining system and a control method for maintaining and transferring deep-sea sediments. Background technique [0002] Deep-sea sediment sampling is one of the basic means of deep-sea environment and resource investigation. After decades of development and practice, a variety of effective sediment sampling methods have been formed. However, the development of pressure-holding sampling transfer equipment after sampling has been slow. [0003] With the depletion of oil, coal and other resources on land, seabed resources have attracted more and more attention from the international marine community. In particular, gas hydrate in seabed sediments is a high-quality fuel. In the ocean, gas hydrate is stable in the sediment at a depth of 0-1000m. Due to the special physical properties of natural gas hydrates that exist stably under certain ...

AI Technical Summary

Problems solved by technology

The pressure-holding transfer device described in Patent No. 201410419344.6 focuses on the working process of sample cutting and transfer. It only roughly describes the use of accumulators, sensors, stop valves and other components to control the constant pressure in the device, and does not specify how to achieve it. The pressure-holding effect in the process of cutting and transferring is described in detail, and the working process and usage method of the pressure-holding device are not described.

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