An underwater and confined space air supply system is a life support system specifically designed to provide divers, tunnel construction workers, firefighters, rescue personnel, and others working in confined spaces such as storage tanks, ship cabins, and underground pipelines with a continuous supply of safe, clean breathing gas. The core objective of this system is to isolate the work environment from toxic and harmful gases, fumes, or the risk of vacuum and oxygen deficiency by stably delivering air or gas mixtures that meet human breathing standards, ensuring the safety and work efficiency of personnel. It is an indispensable key technological support in high-risk work areas.
- Extremely high safety and reliability: From gas source to terminal, the entire process is monitored with multiple redundancy designs, maximizing the protection of workers’ lives and significantly reducing the risk of accidents such as asphyxiation and poisoning.
- Improved operational efficiency: A stable gas supply eliminates the need for frequent cylinder changes or work interruptions, significantly extending effective working time, especially underwater and in complex confined spaces.
- Strong environmental adaptability: The system can be customized for different application scenarios (such as shallow water diving, deep-sea operations, industrial confined spaces, and fire scenes) to meet the needs of various complex working conditions.
- Easy operation and maintenance: Modular design makes equipment operation intuitive, and daily maintenance and component replacement convenient, lowering the barrier to entry and reducing subsequent maintenance costs.
- Compliant with international standards: The design and manufacture of the equipment typically follow authoritative international standards such as EN 12021 and NFPA, ensuring its safety and quality.
Multi-stage Purification and Filtration: The system features a built-in high-efficiency filter that effectively removes oil, moisture, dust, carbon monoxide (CO), carbon dioxide (CO2), and other hydrocarbons, delivering clean, odorless breathing air.
Stable Pressure Output: Equipped with a precise pressure regulator, it provides continuous and stable breathing pressure for work masks or diving suits regardless of fluctuations in the gas source pressure.
Multiple Safety Guarantees: The system integrates an audible and visual alarm system that monitors supply pressure, gas purity, and equipment operating status in real time. It immediately issues an alarm in case of low pressure, gas contamination, or equipment malfunction.
Flexible Gas Supply Modes:
- Umbilical Gas Supply: Provides a near-unlimited supply of breathing gas to the operator via a supply cable, suitable for extended operations within a fixed area.
- Self-Conscious Carbon Filtration and Air Supply (SCBA): The operator carries a tank, allowing for freedom of movement; suitable for short-duration, highly mobile tasks.
- Compatible with Mixed Gases: Can be configured and supplied with nitrogen-oxygen, helium-oxygen, or other mixed gases depending on the operating depth (e.g., underwater) or special environmental requirements.
Human-centered and durable design: The equipment has a compact structure, making it easy to move or fix in place. Key components are made of corrosion-resistant materials, enabling stable operation in harsh environments with high humidity and high salinity.
A typical workflow for an underwater and confined space air supply system is as follows:
1.Air Supply:
Power Source: High-pressure air is generated by an electric or diesel-powered air compressor, or directly connected to a pre-filled high-pressure gas cylinder assembly.
2.Purification:
The high-pressure air first enters the storage tank for initial cooling and pressure stabilization.
It then flows through a filtration system, passing sequentially through a precision filter (for oil, water, and dust removal) and an activated carbon filter (for adsorbing harmful gases such as CO), ensuring the gas purity meets breathing standards.
3.Pressure Regulation and Distribution:
The purified clean air enters a medium- or low-pressure regulating valve, reducing the pressure to a stable, breathing level.
The gas is simultaneously distributed to multiple workers via a supply control panel or distribution manifold. The control panel is equipped with pressure gauges, flow meters, and independent control valves.
4.Safety Monitoring:
After pressure regulation or before distribution, gas quality monitoring instruments (such as CO and O2 monitors) analyze the gas in real time.
System pressure is monitored by safety valves and low-pressure alarms to ensure the pressure remains within safe limits.
5.Terminal Delivery:
Gas is safely delivered to the work terminal via a pressure-resistant reinforced gas supply hose (umbilical cord).
Operators breathe through a secondary regulator or mask to complete the final use of the gas.
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