Historical development of concrete placing boom machine

Now the domestic production of concrete placing machine has two main manual and motorized.
In the mid-1980s boom came hand, his cloth radius of 10m, two-section folding jib can rotate 360 ​​°.
From 1989 to 1991, China's successful development of stand-alone type HG28 hydraulic fabric machine, the boom radius 28m, folding with a four wound type, manual, electric and cable remote control three operating modes, its technology basically reached the performance of similar foreign products in the early 1980s.
Development of 1992. HG30 type independent tower crane boom, boom mounted on the tower type TQ80 body, hydraulic drive, a large range of fabrics, suitable for large-span factories and power stations and other buildings of concrete pouring - in 1991.
The mid-1990s, China experienced in the climbing boom in the 17-28m range, according to transmission mode mechanical and hydraulic radius can be divided into two kinds of cloth and its. This mechanical installation in the center of the cylinder or the elevator shaft of the building, with the increase of the floor and climb. Because of this boom can not shift to some other remote areas need to adopt the way fabric.
In July 1996 the Ministry of Construction Beijing Construction Machinery Research Institute has developed a HGY10 type full hydraulic concrete spreader. The machine uses "Z" shaped folded sub-boom, cloth radius of 10m, weight 2.3 tons, the operation mode is a wired remote control. He has the advantage of compact, mobile and flexible, easy to operate, can be placed on a shelf or when used specifically for the erection of a simple platform, and on the same floor with a mobile crane to reach the required pouring from the surface, walls, columns , after use with a crane lifting machine laying down, without affecting other types of construction.
In summary, the current domestic concrete placing boom has made considerable progress, concrete pump productivity has reached 125 m3 / h, a vertical conveying distance up to 250m above the level of transmission distance over 2000m; domestic car boom concrete pump up to 60 m, pumping height of 200m or more, greatly expanded the scope of work; and 120 m3 / hour of mixing station and mixers and other domestic equipment accounted for a dominant position, the number of foreign imports of concrete machinery declining.