Structure of ISUZU Dry Powder Fire Truck
A dry powder fire truck primarily comprises the following components:
- Chassis: The foundational structure of the vehicle.
- Cab: The driver and operator compartment.
- Compartment: Storage area for equipment and systems.
- Dry Powder Nitrogen System: The core component for fire suppression.
- Water Pump System: Auxiliary system for water-based firefighting.
Dry Powder Nitrogen System: Key Components
This system is the heart of the ISUZU 6000Kgs dry powder fire truck and includes:
- Nitrogen Bottles
- Function: Provide pressurized nitrogen to propel the dry powder agent.
- Installation: Secured at the rear of the compartment using circlips and anti-loosening rubber pads.
- Dry Powder Tankers
- Function: Store dry powder fire extinguishing agents.
- Design:
- Positioned centrally in the compartment with fixed supports.
- Bottom: Equipped with intake pipes.
- Top: Includes pressure gauge connectors, outlet connectors, and a safety valve.
- Intake Structure: One-way valve to prevent backflow.
- Dry Powder Monitor & Gun
- Function: Adjustable nozzle system for targeted firefighting.
- Components: Monitor pipe, elbow inner casing, positioning instruments, and variable valves for adapting to fire scenarios.
Applications of Dry Powder Fire Extinguishers
Dry powder systems are effective for:
- Class A Fires: Combustible solids (e.g., textiles, paper, wood).
- Class B Fires: Flammable liquids (e.g., diesel, petrol, paint).
- Class C Fires: Flammable gases (e.g., methane, butane).
- Electrical Fires: Suitable for electrical equipment under 1000V.
Working Principle of the Dry Powder Nitrogen System
High-pressure nitrogen from the bottles flows into the dry powder tank via a pressure-reducing valve. This nitrogen acts as the driving force, fluidizing the powder and enabling its expulsion through the monitor or gun.
Operational Procedure
- Pre-Use Checks
- Ensure all valves are closed.
- Inspect the dry powder tank for contaminants and clean the sealing surfaces to prevent leaks.
- Powder Loading
- Fill the tank with dry powder after verifying cleanliness.
- Nitrogen Charging
- Pressurize the tank with nitrogen to activate the system.
- Deploying the Monitor
- Adjust the monitor’s valves and nozzle based on fire conditions.
- Post-Use Maintenance
- Clean the monitor to prevent residue buildup.
- Vent residual gas from the tank after operation.
SPECIFICATIONS:
| Overall Paremeter | |
| Brand | ISUZU |
| Model | QL1250U1QDZY |
| Overall Dimension(mm) | 8465x2540x3500 |
| Total Weight(kg) | 33000 With Full Load |
| Capacity | 2*3000Kgs Dry Powder |
| Cabin | Double Cabin With 6 Seats |
| Highest Speed(km/h) | 90 |
| Fire extinguish capacity(kg) | 2x3000kg |
| Nitrogen vase | 12pcs and 80L of per vase |
| Chassis | |
| Model of Chassis | ISUZU |
| Drive type | 6X4 |
| Wheelbase（mm） | 3985+1370 |
| Engine model | 6UZ1-TCG51 |
| Front/Rear axle loading(kg) | 7000+16000+16000 |
| Tire | 315/80R22.5,1200R22.5 |
| Engine rated Power(hp) | 3 |
| Emission Standard | Euro5 |
| PTO | YES |
| Fuel tank volume(L) | 400（Aluminum alloy material） |
| Transmission | ISUZU ZF(Automatic) |
| The highest speed(km/h) | 90 |
| Cab | |
| Structure | Crew cab with 2+2 doors for optimal entry and exit. |
| Seats | 6 people, |
| Advantage | Flat floors, low step heights, and taller, wider cab doors allow firefighters to get in and out quickly at the scene. |
| Dry Powder Extinguishing System | |
| 1.Dry powder tank | |
| Material | high-strength pressure steel Q345R |
| Quantity | 2 |
| Capacity(kg) | 2*2000kg |
| Rated pressure | 1.6MPa |
| Working pressure | 1.5MPa |
| Residual powder rate | ≤14% |
| 2.Nitrogen bottle | |
| Material | 37Mn |
| Quantity？ | 12 |
| Rated pressure(MPa) | 15 |
| Volume(L) | 80/piece |
| 3. Pressure reducing valve | |
| Quantity | 2 |
| Output pressure | 15MPa |
| Max.flowing | 2000m³ /h |
| Opening pressure of safety valve | 1.6 MPa |
| 4.Dry Powder Monitor | |
| Quantity | 2 |
| Working pressure | 1.2-1.4MPa |
| Rated flowing | 40kg/s |
| Range | ≥45m |
| Control | Manual |
| Horizontal rotation angle | 0°~360° |
| Pitch and rotation angle | -15°~60° |
| 5.Dry powder reel | |
| Quantity | 2 |
| Reel hose length | 25mm×40m |
| Injection rate | ≥2.5kg/s |
| Range | ≥12m |
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