Tanzania Shacman road asphalt distributor truck

1.Core working principle of Shacman road asphalt distributor truck

Shacman road asphalt distributor truck realizes precise construction through the coordinated operation of multiple systems.

●The asphalt is transported from the storage tank to the heating system through a gear pump or a screw pump, and the asphalt temperature is raised to 160℃-180℃ to maintain fluidity by circulating heating with a fuel burner or thermal oil.

●The spraying system realizes double/multiple spraying through a three-section folding spraying rod. The nozzle adopts a determinant combination design and supports 0.1-3kg/m² spraying amount adjustment.

●The control system integrates an infrared pulse sensor or a radar speed measuring device to collect vehicle speed data in real time, and automatically adjusts the speed of the asphalt pump in combination with preset parameters such as spreading width and asphalt density.

2. Key points of operation specifications

A three-level inspection system must be implemented before operation:

●Primary inspection: confirm that the nozzle is not blocked (clean one by one with a needle), and the heat transfer oil level is in the center line of the window

●Intermediate debugging: test the spraying system without load, and observe whether the fan-shaped atomization angle reaches the 110-130 degree standard

●Ultimate verification: conduct actual spraying test in the test spraying area, and use the measuring cup method to determine the error of the spraying amount per square meter

The "3 constants" principle must be followed during the construction process: keep the asphalt temperature fluctuation within ±5℃, the vehicle speed stable at 3-5km/h, and the pumping pressure maintained at 1.5-2.0MPa.

3. Technical features and advantages

● Intelligent control system: It adopts modular design and has dual redundant control channels. It can automatically switch to the backup system when the main control system fails. It supports dual control mode of the cab and the rear operating platform. The operator can adjust the parameters such as the spreading width (1.5-6 meters) and the spraying pressure (0.2-0.8MPa) in real time.

● High-efficiency heating system: It is equipped with imported burners and U-shaped combustion chambers, with a thermal efficiency of 92%. With a 50mm thick polyurethane insulation layer, the static temperature drop is ≤1℃/h.

● Precision metering technology: Through high-precision flow sensors and closed-loop control systems, the spreading amount error is controlled within ±1.5%. The nozzle adopts a three-overlap design, and the uniformity of asphalt thickness in the overlapping area reaches 98%, avoiding stripe defects.

● Multi-functional scalability: The standard hand spray gun device can be used to supplement the complex areas such as curbs and manhole covers; the integrated self-priming device supports the transfer of asphalt between tanks to improve equipment utilization.

4. Typical application scenarios of Shacman road asphalt distributor truck

● High-grade highway construction: In the highway section project, the intelligent asphalt distributor completes the spreading of penetration oil and tack oil, with a single-day construction area of ​​80,000 square meters, and the uniformity of spreading is 100% qualified by the laser section instrument.

● Municipal road maintenance: For the repair of potholes on urban secondary roads, a small asphalt distributor is used in conjunction with a milling machine to achieve "milling-sweeping-spreading-paving" integrated construction.

● Airport runway maintenance: In the airport runway shoulder repair project, a vehicle with high-viscosity modified asphalt spreading capability is used, and the spraying thickness control accuracy reaches ±0.2mm.