my country began to develop roller cone drilling rigs in the 1960s. After many improvements and eliminations, 12 models in two series, KY and YZ, are still in production and use. The main research and development units include: Luoyang Mining Machinery Engineering Design and Research Institute, Nanchang Kaima Co., Ltd. and China Steel Weighing Co., Ltd.
Domestic cone drilling rigs have reached the technical level of the United States in the early 1990s, but there is a big gap between the overall performance and similar foreign products today. The specific brand is single, which is manifested in single power, single function, single structural form, and single transmission mode. Behind etc.
1) All accessories of Nanjing Kaima KY series roller drilling rigs are domestically produced, so the manufacturing cost is relatively low. They mainly include KY-250 type, KY-310 type and their derivatives. The KY-250A drilling rig jointly developed by Luoyang Mining Institute and Nanchang Haima pierces the ore rock of F16~F20 in Baosteel's Bayan Obo Iron Mine. The daily perforation efficiency is 128~199.5 m/unit·day, with a maximum of 644 m/unit·day. It surpassed the record of the highest daily footage of 570 m achieved by the Bucyrus 45-R in the mine, and won the National Science and Technology Progress Special Award and the National Gold Medal.
The KY-310 drilling rig has an axial pressure of 0 to 490 kN, a drilling speed of 0 to 4.5 m/min, a gradeability of 12°, and a traveling speed of 0 to 0.78 km/h. The drilling rig adopts AC variable frequency motor drive, top rotation, reducer-closed chain-gear and rack continuous pressurization, high drilling frame, electric, pneumatic and hydraulic combined control, compressed air slag discharge working mechanism, and can be used in various conditions of f ≥5 A 310 mm blasting hole with a hole depth of 18 m was drilled into the ore rock.
2) Sinosteel Hengzhong Company mainly produces YZ-35 type, YZ-5 type and their derivative products. The YZ-35 drilling rig is also a product that won the National Gold Medal, and its performance exceeds that of Bucyrus' 45-R. YZ-55 drilling rig is the largest type of roller drilling rig produced in my country. YZ-55A has been used in Shougang Peru Iron Mine.
In order to increase the propulsion of the drill bit, the YZ-55 drilling rig is designed with three AC variable frequency motors in the rotary system and main transmission mechanism to meet the needs of increasing voltage and frequency. This design is the first of its kind in China. In addition, Sinosteel Hengzhong also applied programmable controller PLC and human-machine interface HMI technology to the YZ-55 turbine, improved the air compressor and separated the machine shed from the cab, etc., thereby enhancing the anti-corrosion of the entire machine. Anti-rust function