ZL-D series electrical rotary head long screw drilling rig is kind of construction equipment for bored cast-in-place pile developed by Changhe in 2005, which is widely applied to the foundation construction of buildings, bridges, airports roadbed and every kinds of soft roadbed. Generally, the diameter of piles is 300-1000mm; the depth of piles is 20-36m.

Main performance

1.Reliable—it is the most reliable long screw drilling rig in China.

2.Stable—it is the most stable long screw drilling rig in China.

3.High working efficiency—  it keeps the best record of 1100m piles per-day.

4.The pile is formed by filling concrete into the hole bottom through the central pipe of the drilling pipe at the same time when the drilling pipe is pulled from the hole, so it doesn’t  require  mud protection and the cost construction is 15% lower than other construction equipment which require mud protection and there is no mud pollution.

5.Independent moving mechanism moves more flexible and easier especially when meets obstacles.

6.Legs-supporting-cylinder-inverted mechanism protects the piston rods from distortion.

7.To meet different working requirements, there are step type and crawler type for your choice.

8.There are foldable square stand pillar with cylinder and spun stand pillar with main winch for your choice.

9.Optional frequence conversion control system can adjust steplessly the rotary rate of the drill pipe, which can make the drill penetrate the strong-weathered rock, and the drill diameter can be increased. And there will virtually be no jamming of the drill pipe.

Product features

1.The supporting leg adopts double column structures, with the features of high strength, low ground pressure and flexible rotatory, which makes  it workable in various complex landforms.

2.The Cylinder is upside down type with protect sleeve, which provides shock resistance, anti-pollution function under the harsh working condition.

3.The patented cantilever articulating mechanism has the rigidity and strength 30% higher than traditional plug-in cantilever, making the machine more stable to operate and more convenient to transport.

4.Box structure frame type of machine body, which is of high strength and good stability.

5.The large area caterpillar boot are with the function of high strength, low ground pressure, preventing warping and fall into mud.

6.High strength and foldable tower

7.Adjustable multiple articulated brace

8.Easy transportation


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