海底热液长期原位探测器流控系统的设计与实现

Design and implementation of fluid control system of long-time in-situ detector for seafloor hydrothermal fluid

为了实现深海热液长期原位探测,设计了3套能实现深海热液传感器在线自校正与自维护功能的流控系统.在实验的基础上,针对系统结构、功耗以及流量特性3个主要方面,对3种流控系统进行了比较,最终选择采用二位二通阀配合泵工作的系统作为探测器的流控系统.针对流控系统不能在高压下工作的缺陷,借助于甲基硅油介质,采用压力补偿的方式设计了流控系统的压力补偿装置,并实验验证了在40 MPa的压力下,所设计的流控系统仍能正常工作,证实了该流控系统合理且实用,从而为深海热液长期原位探测的实现提供了技术支撑.

Three fluid control systems were designed, which could implement the self-calibration and selfmaintenance of sensors for long-time in-situ exploration of deep-sea hydrothermal fluid. System structure, power consumption and flow characteristic were experimentally compared among the three systems, and the system in which the pump matched with two-position two-way valve was chosen as the fluid control system of the detector. Considering the disadvantage that the fluid control system cannot work in high pressure, a pressure compensation device for the fluid control system was designed by means of methyl silicone oil as medium. The results of pressure experiments show that the fluid control system can work normally at 40 MPa, therefore it is reasonable and practical and also provides the technique support for implementation of long-time in-situ exploration for deep-sea hydrothermal fluid.