Oxygen safety system of underwater unmanned closed cabin

Abstract

The invention discloses an oxygen safety system of an underwater unmanned closed cabin. The oxygen safety system of the underwater unmanned closed cabin includes 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 rupture membrane, a pneumatic valve, a one-way valve, a stop valve, a closed cabin, a safety valve, a pressure sensor, an oxygen concentration sensor, a pressure gauge and the like. The oxygen safety system of the underwater unmanned closed cabin can effectively absorb the tail exhaust oxygen generated by the operation of a fuel cell stack and the oxygen generated by a pipeline leakage, and realizes that the oxygen concentration in the closed cabin is below a safe concentration range when the oxygen leakage or oxygen tail exhaust with different conditions and different levels occurs on an underwater carrier platform, which prevents fire or explosion in the cabin, realizes nitrogen cyclic utilization in the closed cabin, and has 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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