Construction Machinery Models
Rotary Drilling Rig
Scale Die-cast Model
Zinc Alloy Die cast
Approx Dimension in Cms(L x B x H)
Approx Weight of the product (g)
Rotary Drilling Rig is a kind of construction machine suitable for forming holes in building foundation engineering. Mainly suitable for sand, clay, silty soil and other soil construction, in the pile, continuous wall, foundation reinforcement and other foundation construction has been widely used, rotary drilling rig rated power is generally 125 ~ 450kW, power Output torque of 120 ~ 400kN · m, the largest hole diameter up to 1.5 ~ 4m, the maximum hole depth of 60 ~ 90m, to meet the requirements of various types of large-scale foundation construction.
Rotary drilling rig first in the United States before World War II Calwell introduced the company, after World War II in Europe to be developed in 1948 Italy Matt company first started to develop, then Italy, Germany began to develop in the 70s to 80s in Japan has been rapid development, At that time, Japan called the rotary bucket into a pile, also known as Ashley profit method (EarthDriII), in Germany, Japan, such practices are quite common. China introduced a working device from Japan in the early 1980s and was equipped on a KH-125 crawler crane. In 1984, Tianjin Prospecting Machinery Factory introduced rotary drilling rig from American RDI and digested and absorbed. In 1987, the first exhibition of SOILMEC products was held at the Beijing Exhibition Center. In 1988, Beijing Urban Construction Machinery Factory developed a 1.5m diameter crawler crane attachment rotary drilling rig based on the geotechnical prototype.