1.Introduction of YQZ-50A hydraulic core drilling rig YQZ-50A hydraulic core drilling rig is a high, medium and low speed drilling rig with hydraulic pressure feeding. The rig is suitable for geological drilling of complex terrain such as mountains, hills and rivers, engineering geological survey of buildings, and drilling of blast holes. In order to meet the needs of different users, the rig can be equipped with one of three powers of diesel engine, gasoline engine or electric motor. The default is diesel engine power. 2. Features of YQZ-50A hydraulic core drilling rig This model of light weight drilling rig is compact, small and lightweight. The rig can also be dismantled quickly, making it easier to carry the mountain, especially for complex terrain such as mountains and hills. Compared with similar products, this type of portable drilling rig is equipped with a double cylinder hydraulic feeding system, which has a fast drilling speed and high work efficiency. This type of portable drilling machine operation panel is equipped with a pressure gauge at the bottom of the hole to indicate the pressure, so that the operator can adjust according to different terrain conditions. This model of lightweight drilling rig is equipped with a high-performance 4-speed shifting system. It is convenient for the operator to adjust the forward rotation speed according to the geological conditions. In addition, it is equipped with an ultra-low speed reverse gear, which is convenient for the operator to disassemble the drill pipe. The rig is equipped with a fixed clamping mechanism and an integrated main rod, which eliminates the need for a rig and makes the work more compact. 3. Technical parameters of YQZ-50A hydraulic core drilling rig Name Content Model or parameter Rig host Power section diesel engine Rig weight 168kg Drill size 1250*650*1450mm Drill pipe diameter 38mm Drilling diameter 46mm 60mm 75mm Drilling depth 55-60m 50-55m 45-50m Gearbox position 4-speed shift Gyrator Clamp type Fixed clamping type Vertical axis type Hexagonal Vertical axis opposite side length 36mm Vertical shaft length 1400mm Vertical shaft forward rotation speed 220/580/960rpm Vertical axis reverse speed 130rpm Vertical shaft maximum output torque 400n.m Vertical shaft double cylinder stroke 1200mm Double cylinder maximum feed force 7kn Double cylinder maximum lifting force 15kn Double cylinder maximum lifting force 0.035m/s Vertical axis no-load down speed 0.085m/s Hydraulic system Oil pump flow 10ml/r Pressure gauge pressure range 0-6mpa Pump rated pressure 20mpa Hydraulically operated valve position 4files Maximum feed pressure 6mpa(900kg) Maximum lifting pressure 9mpa 1360kg Hydraulic tank capacity 9l