DG32C Elevating platform fire truck is a multi-purpose fire fighting vehicle, which is hydraulic driven, full-rotary, telescopic boom + folding arm type, equipped with a fire fighting and rescue ladder. The chassis adopted in this truck is Germany Benz Axor 2628 universal II chassis, which has three sections of synchronous telescopic boom and one section of folding arm, head of the folding arm is pivoted on working platform. Fire system pipeline and rescue ladder are both fixed at the right side of telescopic boom, which will telescope together with the movement of boom; the dual-cylinder luffing, H mode outriggers can achieve 360Â° rotation; it's equipped with a complete set of safety protective devices. The overall truck can be respectively operated on turntable and platform.
I. DG32C Fire Truck Main Characteristics
1. The truck has incorporated the functions of the elevating platform fire truck and high pressure spray fire truck, so it can not only perform rescue work but also extinguish the fire (the truck is integrated with a water monitor).
Â Â Â Â 2. With advanced technologies applied and high quality guaranteed, the main performance parameters of this truck have reached (or exceeded) international level of the same products.
Â Â Â Â 3. Adopted with electro-hydraulic proportional control system and is hydraulic driven, the overall vehicle works stably and reliably, convenient for operation.
Â Â Â Â 4. This truck has three sections of telescopic boom and one section of crank arm.
This truck has three sections of Â synchronous telescopic boom (telescoping mechanism is first-grade cylinder + chain transmission, enabling synchronous telescoping), telescopic boom can luffingÂ within -3Â°~80Â° while crank arm can luffingÂ within 0Â°~180Â°, theÂ crossÂ section is box type, made of high strength steel.
5. This truck has a slewing buffer function. Slewing mechanism consists of the planetary gear reducer and the constant closed-type brake. Constant displacement motor drives external-gearÂ typeÂ single-row ballÂ slewingÂ bearing. A cushion valve is adoptedÂ in hydraulic systemÂ to ensure stability when being started up and being braked, so that a good jiggle characteristic is then guaranteed.
Â Â Â Â 6. This truck has adopted 011.45.1250 slewing bearing produced in accordance with German HRS Company, featured in light weight, strong bearing capacity and long service life, etc. Â
II. DG32C Fire Truck Main Components
1. Telescopic Boom and Telescoping Mechanism
It is box-type synchronous telescopic boom, made of high strength steel plate, whose cross-section shape is great circle arc quadrilateral. The synchronous telescopic mechanism is double-acting cylinder plus chain, which has overcome joggle phenomena and increased vehicle stability.
2. Crank arm and Platform
Crank arm cross-section is quadrilateral; the double-acting cylinder and four-bar linkage enable it to fold within 180Â°Â range. The platform is a frame structure made of shape steel, rotary within 45Â°Â leftward and rightward, and a remote water monitor with control unit is installed on it.
3. Leveling Mechanism
Leveling mechanism is electric zero cover plus closed-loop hydraulic servo system, which ensuresÂ that overall vehicle always remains level in working status; besides, a manual leveling mechanism is set up.
As the turntable is a connecting component between the preceding and the following, it is high pivoted in a plate-type frame; the slewing mechanism is located in front of turntable, amplitude cylinder is inside of vertical plate, a console is set at the left side. Slewing bearing is connected with auxiliary frame. The slewing mechanism consists of hydraulic motor and planetary acceleration mechanism; high-pressure hydraulic oil drives hydraulic motorÂ andÂ enables planetary deceleration mechanism to have 360Â° continuous rotation through gear and slewing bearing.
5. Central Rotary Body
Central rotary body consists of fixed body, rotary body and electric circuit slip ring, through which hydraulic pressure, electric circuit and water piping are connected from the upper structure to lower structure.
6. Water Piping System
Fire system piping is stainless suit type synchronous telescopic pipeline; water pipe reaches the upper structure by pass ofÂ central rotary body and starts to supplyÂ water or foam. A hydraulic fire water monitor installed on work platform is developed by American Darley Company, the flow is 50L/s and spray range is over 65m, water flow form is changeable (straight water flow and dome of water).
7. Auxiliary Vehicle Frame
Â Large box structure, light weight and strong capacity, oil tank and frame are integral and space-saving; four "H" shaped outriggers carry vehicle weight during fire fighting; there are 2 large tool boxes fixed at both sides of vehicle frame for convenience of accessory storage, besides, two rolling doors are set at both sides, which not only make it convenient to maintain but also exalt vehicle appearance.
8. Upper Structure Hose and Cable Device
Crank arm head and platform power as well as control signal are transmitted from the hose and cable which are located at left side of telescopic boom. The hose and cable are fixed onto chain groove and can slide with the movement of telescopic boom.
The genuine German Benz Axor 2628 II chassis is adopted within the vehicle, which has 16 forwarding gears and 2 reverse gears, the max. speed can reach 85km/h, 6-cylinder V shape inter-cooling boost engine, power is 280 horsepower and the emission reaches Euro IIIÂ standard, equipped with ABS and automatic navigation function, controlled by electric module, hydraulic assisted gear shift, gear engagement is accurate, stable and reliable.
10. Power take-off Device
The function is to transfer engine power from transmission PTO to hydraulic pump; as the power source of overall hydraulic system, it can achieve all kinds of movements forÂ hydraulic system, the power take-off device is the genuine part of Benz chassis.
III. DG32C Fire Truck Safety Protective Device
This vehicle has a complete set of safety protective devicesÂ which ensures working reliability, and a lighting device is set for convenience of night operation.
1. Anti-collision device:
Anti-collision comes into play when work platform collides with obstacles, it will automatically stop and protect the platform and staff from beingÂ damaged.
2. Extreme position stop device:
Â Â Â Â It will automatically stop when telescopic boom elevation reaches the maximum degree.
3. Upper/lower structure interlocking function:
Â Â Â Â Upper structure fails to operate if outriggers are not in working status. Outriggers can be retracted only when upper structure comes into driving status.
4. Leveling Device:
Chassis can automatically and manually level the vehicle by means of a level gauge, the platform can be automatically leveled, when platform tilting angle exceeds 10Â°, upper structure will stop all the movements.
5. Working Range Limiter:
It can ensure that the vehicle is working within safety range, when it exceeds working range, vehicle movements will stop.
6. Single-side Working Protection:
When it's not allowed to fully extend the outrigger beams, this function can ensure that the vehicle can operateÂ on the side at whichÂ outrigger beams are fully extended.
7. Emergency Power Unit:
A petrol engine pump is equipped in the vehicle, which will power up the vehicle to make all kinds of movements as a standby power unit on the occasion that engine fails to work.
Main Technical Parameters in Driving Status
|1st shaft - 2nd shaft||mm||4500|
|2nd shaft - 3rd shaft||mm||1350|
|Engine power/rev.Â speed||kw/r/min||205/2200|
|Shaft load||Front shaft||kg||6000|
|Double rear shaft||kg||17850|
|Min. Turning diameter||m||â‰¤20.3|
|Braking distance (speed is 30Km/h)||m||â‰¤10|
|Min. ground clearance||mm||204|
- Main technical parameters in working status
|Rated working height||m||32|
|Max.Â working radius||m||19|
|Outrigger span (longitudinal x transverse)||mm||6000Ã—5800|
|Luffing range||Â°||-3 ~Â 80|
|Boom operation time||s||â‰¤150|
|Outrigger extension time Â Â Â Â||s||â‰¤30|
|Water monitor rated flow Â Â Â Â||L/s||50|
|Water monitor rated pressure||MPa||â‰¤1.0|
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