The long screw drilling machine is composed of motor, reducer, drill rod and drill bit. The whole drilling machine is suspended on the pile frame through the pulley group, and the lift and position of the drilling machine are controlled by the pile frame. The motor on the drill is suitable for full load with good overload protection. Reducers mostly use vertical planetary reducer.
In order to ensure the stability of the drilling rod and the accuracy of the initial drilling, the intermediate rod stabilizer is installed at 1 / 2 of the length of the drilling rod, which is suspended on the power head of the drill rod with a wire rope, and moves up and down along the pile frame column along with the power head. In the lower part of the drill rod with the guide ring, the guide ring is fixed on the pile column, drill pipe is a welded steel pipe, long screw blade, multiple section production; common hollow drill rod, vertical hole in the drill L can directly pour concrete from the hole, watering and slowly raise the hole wall stability, reduce the collapse of the hole, and improve the quality of the cast pile.
When drilling, the soil at the bottom of the hole rises along the spiral blades of the drill rod, unloading the soil on the land around the drill rod, or transporting it through a hopper and unloading in transport tools such as a dump truck. The hole diameter of the long spiral drilling machine is not more than 1m. In order to meet the drilling needs of different strata, various drills are equipped, which are suitable for the construction of clay and sand layer with low underground water level.
The long spiral drilling machine is mostly driven by a hydraulic motor, which has a light weight and a very convenient speed regulation. The hydraulic power is provided by the crawler pile holder.
