武汉8” Hydraulic Walking Type Normal Circulation Drill

1.DZJ-2000 normal and reverse circulation circulation drilling rig is a rotary drilling rig that integrates multiple functions into one, which reflects a new technology of multi-purpose machine. It is an ideal hole-forming machine, and at the same time, it has hydraulic walking, vehicle, crawler and other models, making the machine more usable, more flexible, convenient and reliable. The machine can change the drilling method ( normal and reverse) at any time according to the stratum variability. Frequency control 1-50 rpm free adjustment. Solved the drilling speed requirements. Therefore, the machine is more suitable for the construction of various complicated strata such as quicksand, silt, clay, pebbles, gravel layers, weathered rocks, etc. It is widely used in constructions such as buildings, bridges, water conservancy, water wells, electricity, telecommunications, and engineering precipitation.

2. Basic Parameters of Drill：

8”（DZJ-2000）Normal Circulation Drill

DZJ-2000 drill is a normal and reverse circulation drill, which is composed of YD multi-change speed motor, gear reducer, normal and reverse circulation mud pump, valve, hydraulic pump, oil cylinder, main winch, auxiliary winch, distributor box, drilling cramp, pipe and drill bit.

二. Drill Structure

1. The main motor is YD multi-speed motor, and the rest motors are common Y-series motors.

2. The gear reducer adopts four-axis three-stage gear reduction combined with an inverter motor, which can perform 0-120 Hz transformation to achieve the purpose of variable speed. The spindle speed can be changed according to the construction diameter and formation.

三、 Operating Principle of Normal Circulation Drill：

1. The oil pressure system of the drilling rig is controlled by the oil pump through the pipeline through a multi-way valve, and it is delivered to the actuators as required to complete various actions.

2. The reducer transmits the power to the output shaft via variable speed, which drives the drill rod and drill bit to perform the rotary motion, and completes the forward rotation (clockwise) for cutting work. (For reversing the drill rod for unloading) turn. (Reverse rotation will cause the drill pipe to fall off and drill accident)

3. Forward cycle operation:

3.1. If you need to change the drill bit method during construction or well washing reasons, the operation steps are, for example, positive circulation, operate the hydraulic handle, close the pressure valve on the large mud pump, start the 3PNL small mud pump, water Pass the pipe through the power head, the drill pipe, and enter the bottom of the drill tip, so that the cutting mud in the hole is supported by the water flow and flows down the well pipe to the sedimentation tank. The precipitated water enters the 3PNL mud pump again, forming a cycle.

3.2 The lower cage and ash filling of the rig

After the pile hole is completed, raise the drill rod, drill bit, and the drill rig to move the appropriate position at the same time. Depending on the auxiliary forehead hook on the frame aligned with the center of the pile hole, the cage can be lowered and the commodity ash can be poured at the same time.