1. The classification and structure of asphalt pavers. At present, imported pavers are still used most in the domestic construction market. The main brands are ABG, Vögele, Demag and Dynapac. With the With the introduction of foreign technology and independent research and development, the quality level of domestic brands of pavers such as Shaanxi Construction and Zoomlion has also been continuously improved. Whether they are domestic or imported pavers, they can be divided into two categories: crawler type and tire type.
1.1 Crawler paver is generally a large or super large paver. Its advantages are small ground pressure, good adhesion performance, smooth operation and no slipping during paving operations. Its disadvantages are poor maneuverability, poor adaptability to roadbed protrusions, insufficient smoothness of the paving edges during curve operations, complex structure, and high manufacturing cost. Crawler paver is used for the construction of large-scale road projects.
1.2 Tire-type paver relies on its tires to bear the gravity of the entire machine and provide adhesion. Its advantages are high transition speed, good maneuverability, strong adaptability to roadbed protrusions, and curved operations that easily form slipping edges. Its disadvantage is that its adhesion is small, and slipping may occur when paving roads with larger widths and thicker layers. In addition, it is sensitive to the undulations of the roadbed and requires the assistance of an automatic leveling device to improve the smoothness of the road surface. Tire-type paver can be used for pavement construction and maintenance operations on various roads. The asphalt mixture paver is mainly composed of power device, transmission system, feeding device, control mechanism, etc. The power unit mostly uses a diesel engine; the transmission system consists of a gear transfer box, a hydraulic pump, a hydraulic motor and various transmission chains; the feeding device consists of a hopper and a scraper conveyor; the working device consists of a screw distributor, a vibrator It is composed of utensils and screeds.
