High-pressure carbon dioxide fire extinguishing system
System Composition:
The QME70 high-pressure carbon dioxide fire extinguishing
system is mainly composed of cylinder groups, container valves,
selection valves, signal feedback devices, piping networks,
nozzles, gas fire extinguishing controllers, weighing devices, etc.
According to the installation form, it can be configured into two
types of fire extinguishing systems: unit independent fire
extinguishing system and combined distribution fire extinguishing
system.
System Features:
Carbon dioxide gas is an excellent fire extinguishing agent. Its
chemical formula is CO. At normal temperature, it is a colorless,
odorless, non-conductive, chemically neutral, corrosive and toxic
gas. The vapor pressure of carbon dioxide changes with temperature.
As the temperature rises, the vapor pressure increases. In a fixed
container, as the temperature rises, the pressure that the
container can withstand also increases. This fire extinguishing
system belongs to physical fire extinguishing. It has the
characteristics of safety, stability, convenience, rapidity and
ease of use. This series of products all meet the requirements of
GB16669 standard and have voluntary certification certificates.
Application scope:
1. Electrical fire hazard areas, such as: electronic computer
rooms, electronic equipment rooms, communication rooms, etc.
2. Liquid fire (petroleum products, glycerin, etc.) and liquefiable
solid fire (sulfur, phosphorus, paraffin, plastics, etc.) hazard
areas, such as oil transformers, distribution rooms with oil-filled
switches.
3. Solid surface and deep-level fire hazard areas of cotton, wool,
fabrics, paper, etc., such as libraries, archives, and document and
cultural relic storage rooms.
4. Gas fire hazard areas, such as natural gas, hydrogen, liquefied
petroleum gas, methane, etc.
Technical Specifications:
| Model number | QME70 |
| Fire extinguishing method | Full immersion |
| System design pressure | 5.7MPa |
| Fire extinguishing cylinder specification | 70L |
| System startup method | Automatic, manual, mechanical start, mechanical emergency start |
| Storage container filling capacity | 600kg/m³ |
| Startup cylinder filling pressure | 6.0MPa |
| Startup method and power of the startup cylinder | Electromagnetic start: 24V DC, 1.2A |
Working principle:
Startup methods:
The system's startup relies on two types of drives, namely
the electromagnetic drive and the pneumatic-handled dual-purpose
drive.
1. The electromagnetic drive is used for the upper bottle.
2. The pneumatic-handled dual-purpose drive is used for the main
cylinder.
The system has four specific startup methods: automatic
startup, manual startup, mechanical startup, and emergency
mechanical startup.
1. Automatic startup - When two different types of detectors
(usually smoke and temperature combined) in the protected area
simultaneously send out fire alarm signals, the fire alarm
controller delays for 30 seconds (0-305 adjustable), and sends an
electrical signal to activate the corresponding area's startup
cylinder. The startup gas first opens the selection valve of the
corresponding area, and then opens the fire extinguishing cylinder
group (in a unit-independent system, the fire extinguishing
cylinder is directly opened), implementing fire extinguishing in
the corresponding area.
2. Manual startup - When a fire occurs in the protected area and
the personnel have safely evacuated, the staff presses the
emergency startup button at the entrance of the protected area, and
delays for 30 seconds (0-30 seconds adjustable). The fire alarm
controller sends an electrical signal to activate the corresponding
area's startup cylinder, implementing fire extinguishing in the
corresponding area.
3. Mechanical startup - When the electrical startup fire
extinguishing fails, the staff can mechanically start the
corresponding area's startup cylinder in the cylinder room to
implement fire extinguishing in the corresponding area.
4. Emergency mechanical startup - When the above three startup
methods fail, the staff can manually open the corresponding
selection valve and the active cylinder head valve in the cylinder
room respectively to implement fire extinguishing in the
corresponding area.
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