1、 Brief introduction:
Dump truck is a vehicle that unloads goods by hydraulic or mechanical lifting. Also known as dumper. It is composed of automobile chassis, hydraulic lifting mechanism, cargo box and power take-off device.
2、 Application scope of dump truck
In civil engineering, dump truck often works with excavators, loaders, belt conveyors and other construction machinery to form a loading, transporting and unloading production line for loading, unloading and transportation of earthwork, gravel and bulk materials.
3、 Advantages of dump truck:
Because the loading carriage can automatically dump at a certain angle, the unloading time and labor force can be greatly saved, the transportation cycle can be shortened, the production efficiency can be improved, and the transportation cost can be reduced.
4、 Maintenance skills of dump truck:
The new dump truck or the overhauled truck must be put into trial operation, so that the lifting process of the carriage is stable without movement.
When using, the lubricating oil should be selected correctly according to the regulations, which can greatly save the unloading time and labor force. The lifting mechanism should change the oil strictly on schedule.
The goods shall be shipped according to the rated loading capacity, and overloading is strictly prohibited.
5、 Working principle of dump truck
The structure of engine, chassis and cab of dump truck is the same as that of general truck.
The carriage of dump truck can be divided into two types: backward tipping and lateral tipping. The movement of piston rod is controlled by the control system. Backward tipping is common. Pushing the piston rod causes the carriage to tip over, and a few double tipping.
The high-pressure oil enters the lifting hydraulic cylinder through the distribution valve and oil pipe, and there is a cab safety guard board at the front of the carriage.
The engine drives the hydraulic pump through the transmission and power take-off device. The hydraulic tilting mechanism of the carriage is composed of oil tank, hydraulic pump, distribution valve, lifting hydraulic cylinder, control valve and oil pipe.
The carriage hydraulic tipping mechanism is composed of oil tank, hydraulic pump, distribution valve, lifting hydraulic cylinder, control valve and oil pipe.
The engine drives the hydraulic pump through the transmission and power take-off device, and the high-pressure oil enters the lifting hydraulic cylinder through the distribution valve and oil pipe, and pushes the piston rod to make the carriage overturn. Rear tipping is common. The piston rod movement can be controlled by the control system to stop the carriage at any desired tilting position. The carriage uses its own gravity and hydraulic control to reset.
6、 Classification of dump trucks
Classification by shape:
Single axle dump truck, double axle dump truck, flat end dump truck, pointed tip dump truck, front four rear eight dump truck, double axle semi-trailer dump truck, three axle semi-trailer dump truck
Classification by use:
Agricultural dump truck, mine dump truck, environmental sanitation dump truck, coal transportation dump truck, construction machinery dump truck, sludge dump truck, etc
According to the different driving modes, it is also divided into 6x4, 8x4 to unload and semi-trailer dump trucks.
According to the different uses, it can also be divided into mining dump truck, which is used to transport coal mine, sand and gravel; environmental sanitation and greening dump truck, used to transport garbage, etc.
According to the direction of car overturning, there are front lift and side dump trucks. At present, there are two-way rollover dump trucks, mainly used in construction projects.