Concrete pump truck design background

Concrete pump trucks are machines that use pressure to continuously transport concrete along pipelines. Consists of a pump body and a delivery tube. According to the structure, it can be divided into piston type, extrusion type and hydraulic diaphragm type. The pump body is mounted on the chassis of the vehicle and equipped with a retractable or inflected boom to form a pump truck. The concrete pump truck is transformed on the chassis of the truck. It is equipped with a movement and power transmission device, pumping and stirring device, material distribution device and other auxiliary devices on the chassis. The concrete pump truck transmits the power of the engine to the hydraulic pump group or the rear axle through the power transfer case, and the hydraulic pump pushes the piston to drive the concrete pump to work. Then the concrete is transported to a certain height and distance by means of a distribution pole and a conveying pipe on the pump truck. Since cement was invented, the transportation and pouring of concrete has always been the subject of research. The traditional construction method was the use of buckets, which was inefficient and could not meet the development requirements of modern industrialization. In the early 20th century, Europe had been studying concrete transportation. The pump, however, was not effective enough to promote it. It was not until Schwing (Germany) produced the world's first hydraulically-driven tow concrete pump in the 1950s. Rapid development, continuous improvement of the structure, and continuous enhancement of pumping capacity. So far, the maximum concrete pumping height has reached 532 meters, the longest pumping horizontal distance has reached 2015m, and the maximum theoretical pumping capacity has reached 200m3/h, which has greatly improved the production efficiency, especially in the construction of high-rise buildings. Become a necessary equipment, but during use, people gradually discovered some limitations of the pump: When the pump is used, it must be laid on the building, the preparation workload is large; with the change of the watering position, the pipeline must be manually It is inconvenient for the export to move constantly; the work of the tow pump is always completed at a fixed location, and the use of equipment in this way is very low. Aiming at these shortcomings of dragging pumps, in the 1970s, a concrete pump truck with integrated functions of driving, pumping and cloth was developed.

The concrete pump truck is a special vehicle that integrates a pumping mechanism for pumping concrete and a boom for cloth on the chassis of a vehicle. When it is in operation, the power of the chassis diesel engine is used to transfer power to the hydraulic cylinder through the transfer box. The pump then drives the concrete pumping mechanism and the boom system. The pumping system pressurizes the concrete in the hopper into the pipeline. The pipeline is attached to the boom, the boom can be moved, and the concrete pumped out from the pumping mechanism can be directly To the pouring point.

Compared with the tow pump, the pump truck has the following advantages: 1. The arm is attached to the pipe, and the boom can be opened to work soon after it is opened to the work site, usually within half an hour, and the preparation time is short. 2, with hydraulic folding arm rack, in the working area can be flexible rotation, convenient and quick fabric, and pumping speed, generally 90m3/h to 150m3/h, high work efficiency; 3, high degree of automation, the whole Pumps from the pump to the fabric can be operated by one person, generally equipped with a wireless remote control system, easy to operate; 4, maneuverability is good, after a project operation can be quickly transferred to another project to continue operations, can also be responsible for several The project's concrete pumping has high equipment utilization rate.

China's pump truck was first used in 1979. At that time, the introduction of pump trucks from Japan was carried out at Shanghai Baosteel. In 1982, the Hubei Construction Machinery Plant imported arm boom production technology from Shichuan Island in Japan and began production of pump trucks as the first domestic concrete pump truck production plant. With the development of the construction industry, the number of pump manufacturers has gradually increased, but most of the booms have begun to import. Now they are gradually changed to self-made and import-assisted production. In 1999, Sany Heavy Industry Co., Ltd. began to develop its own 37-meter-long concrete pump truck and became the first company to independently develop a long boom concrete pump truck. At present, there are more than 10 concrete pump manufacturers in China, and the production capacity is mainly concentrated in Sany Heavy Industry, Xugong Technology, Liaoning Heinuo, Shanghai Putzmeister and other companies, of which Sany Heavy Industry accounts for about 50% of the domestic market. the above.

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