In the field of construction, pump trucks are a very critical equipment. I will talk to you about the characteristics and principles of pump trucks.
From the perspective of structural composition, the chassis of pump trucks usually adopts heavy truck chassis, which provides the basis for the movement and load-bearing of the entire pump truck. Chassis of some well-known brands such as Mercedes-Benz and Volvo are often selected. They can ensure reliable operation under complex road conditions and determine the maneuverability, load-bearing capacity and driving stability of pump trucks. The boom system is a key part of the pump truck, which includes multi-section booms. The booms are made of high-strength steel and can be extended and folded to achieve concrete delivery at different heights and distances. Common booms range from 3 to 6 sections, with an extension length ranging from more than 30 meters to more than 60 meters or even longer, meeting the needs of construction sites of different sizes. The pumping system is mainly composed of a hopper, a pumping cylinder, a distribution valve, etc. The hopper is used to receive and store concrete. The pumping cylinder sucks in and presses out concrete through the reciprocating motion of the piston. The distribution valve controls the flow direction of concrete. In large-scale construction, concrete can be delivered at a speed of tens of cubic meters per minute. The hydraulic system provides power for the boom and pumping system, and drives the actuators through hydraulic oil pressure transmission. The advanced hydraulic system can accurately control the boom movement and ensure the stability of the pumping pressure. The control system includes an electrical control system and a remote control. The operator can operate in the cab or at a safe distance through the remote control to adjust the boom position, control the pumping speed, etc.
In terms of working principle, the concrete mixer unloads the mixed concrete into the pump truck hopper. The pumping cylinder of the pumping system reciprocates under hydraulic drive. When the piston retracts, the hopper concrete is sucked in. When it extends, it is pressed into the distribution valve. The distribution valve then distributes the concrete to the boom delivery pipeline. Under pressure, the concrete is delivered to the designated location of the construction site. During the process, the boom can be extended, folded and rotated as needed.
The pump truck has many characteristics and advantages. Strong mobility is one of its significant features. It can move freely at different construction sites without the need for complex installation and disassembly like fixed concrete delivery equipment. For example, in urban construction, it can be quickly transferred to multiple construction sites to improve equipment utilization. The conveying efficiency is high, and a large amount of concrete can be conveyed quickly and continuously. Compared with the traditional manual conveying method, the time is greatly shortened, such as in the construction of large bridges and high-rise buildings. The spreading range is wide, and the flexible extension and rotation of the boom can cover a large construction area, realizing all-round spreading. During the foundation and main construction stages of large buildings, concrete can be conveyed from one place to every corner. The degree of automation is high. Modern pump trucks are equipped with advanced control systems, which are simple and convenient to operate. They can also realize automatic pumping and boom control, such as preset programs to realize automatic extension and positioning of the boom, reducing the difficulty of operation and labor intensity.
In the equipment trading market, second-hand dealers play an important role in the trading of pump trucks. When purchasing second-hand pump trucks, second-hand dealers will strictly inspect the chassis to check whether the chassis has serious wear, deformation or repair marks, because the condition of the chassis directly affects the movement and stability of the pump truck. For the boom system, they will check whether the extension and folding of the boom are smooth, whether there are cracks and deformations, which is related to the range and safety of concrete delivery. The pumping system is also a key inspection object. Check the wear and working performance of the pumping cylinder, distribution valve and other components to ensure that the concrete can be pumped normally. In terms of the hydraulic system, check whether there is hydraulic oil leakage and whether the hydraulic components are working properly. For those second-hand pump trucks that have been inspected and have guaranteed quality, second-hand dealers will carry out appropriate renovation and maintenance, such as repairing the appearance and replacing some vulnerable parts, and then put them on the market. These second-hand pump trucks provide an economical and affordable option for customers with limited budgets but who need pump trucks. At the same time, second-hand dealers will also provide customers with equipment usage advice and after-sales guarantee services, so that customers can feel more at ease when purchasing second-hand equipment.