An Oxygen Safety System for an Underwater Unmanned Airtight Cabin

Abstract

An oxygen safety system for an underwater unmanned airtight cabin, including a liquid oxygen storage tank, an oxygen compressor, a high-pressure oxygen buffer tank group, an oxygen scavenger, a molecular sieve oxygen generator, an air compressor, a bursting membrane, a pneumatic valve, a single Directional valves, globe valves, sealed compartments, safety valves, pressure sensors, oxygen concentration sensors, pressure gauges, etc. It can effectively absorb the exhaust oxygen generated by the operation of the fuel cell stack and the oxygen generated by the pipeline leakage, and realize the underwater carrier platform to ensure the safety of the airtight cabin when different situations and different levels of oxygen leakage or oxygen exhaust occur. The oxygen concentration is below the safe concentration range to prevent fire or explosion in the cabin, realize the recycling of nitrogen in the airtight cabin, and have a high safety factor.

Description

technical field [0001] The invention relates to the field of safety and guarantee equipment for an underwater carrier platform, in particular to an oxygen safety system for an underwater unmanned airtight cabin. Background technique [0002] In recent years, with the continuous advancement and implementation of my country's ocean power strategy, the requirements for deep-sea resource exploration and development capabilities, marine life and environment observation capabilities have become higher and higher. Under the guidance of such demands, the application of underwater delivery platforms However, for the deep underwater carrier platform, the efficiency, energy density and emission of the system are the most important issues, and the fuel cell is based on its excellent characteristics in these aspects, making it a power source for underwater equipment. The system has become a reality and has attracted widespread attention in many developed countries. Based on the current un...

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Problems solved by technology

[0003] In the underwater carrier platform, the area where the oxygen system is located is an unmanned airtight cabin. For the unmanned airtight cabin of the underwater carrier platform, the safety of the oxygen system mainly includes the following aspects: First, due to the The utilization rate of the stack cannot reach 100%. Therefore, there is an oxygen exhaust exhaust during normal operation. If no measures are taken, this exhaust oxygen will not only gradually increase the oxygen concentration in the cabin, but also make the The cabin pressure of the sealed cabin will also increase; secondly, there will be micro-leakages in the pipelines, valves and pipeline joints of the oxygen system in the sealed cabin, and after a period of accumulation, the oxygen concentration in the cabin will gradually increase; thirdly, If the pipeline valve in the cabin is damaged or the seal fails, the oxygen concentration in the cabin will increase rapidly. Compression and other external uncontrollable factors lead to vacuum failure, so that the liquid oxygen inside the liquid oxygen storage tank is rapidly vaporized, and the internal gas and oxygen pressure rises rapidly. When it rises to the design pressure of the liquid oxygen tank, overpressure discharge is required. Fifth, although the liquid oxygen tank adopts many heat insulation measures, it still has a certain daily evaporation rate. When the fuel cell is not working, the liquid oxygen tank will reach its design pressure by self-evaporation in less than one day , which in turn requires overpressure discharge

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