
ZL220A 22T HDD Machine
Model | Unit | ZL220A |
Engine power | KW | 118 |
Max. Pull / Push force | KN | 220 |
Max. Pull / Push speed | m/min | 40 |
Max.Torque | N.M | 7000 |
Max. Slewing speed | r/min | 200 |
Max. Flow of slurry pump | L/min | 240 |
Max.pressure of slurry pump | Mpa | 8 |
Max. drill pipe diameter | mm | Ф900 |
Max. Working distance | m | 300 |
Crawler speed | Km/h | 2.5-4.0 |
Drilling rod | mm | Ф60×3000 |
Push-pull type | Rack & Pinion | |
Max. grade ability | ° | 25° |
Drillling Angle | ° | 10-20° |
Weight | T | 8.3 |
Dimension(L*W*H) | mm | 6300*2100*2560 |
HDD machine diameter reduction: the soft soil layer is expanded, and the diameter of the hole is prone to shrinkage. After the drill pipe is removed, the water in the hole pours out from the drill pipe, indicating that the diameter of the hole is severely reduced. When the diameter is severely reduced, the laid pipe will be squeezed and deformed, or even stuck. In case of severe diameter reduction, use solid mud to protect the wall to balance the pressure in the hole and maintain the hole. Or increase the first-level drill bit to expand the hole, then clear the hole and lay the pipe. Choose PE and PVC pipes with high hardness and strong resistance to lateral pressure. If the diameter is slightly reduced, the pipe can be laid by cleaning one more hole.
Hole collapse: Reaming of sandy clay layer, sand layer, loose backfill soil layer is easy to collapse hole, collapse hole buried drill, stuck drill, stuck pipe laying, and caused road cracks to sink. Use solid phase mud and heavy colloidal solid phase mud for wall protection, which can effectively prevent hole collapse. If the hole collapses at the pile of rocks, the hole can only be enlarged after the rocks are removed.

Related Knowledge on HDD Machine price
Group of overseas shares the prices behind every quote. Due to there are too many extensions and accessories of HDD machine, so it’s not easy for a new comer to know and compare the HDD machine prices for different suppliers right. Make sure to check followings when you receive a quote
- Whether rod feeder is manual, semi-automatic or full automatic rod feeder. Because price big difference
- Whether anchore is hydraulic anchor or manual. Price big difference.
- Whether track is steel track or rubber track. Price big diffrence
- Whether cabin with air conditioner included in the hdd machine price. Price big difference.
- Whether the motor is EATON or SAYI, price and performance difference
- Whether hydraulic pump is imported Permco or not, Price and performance big difference.
- Whether raw material is Q235 or W610, Price and life span difference.
- Whether rods is 100no.s , how many reamers?
- What brand locator is DCI or other brand? Prices are different.