Casing Oscillator KRT150
1. Description
Greater embedding pressure can be achieved by Casing oscillator instead of Casing Drive Adapter, Casing can be embedded even in hard layer.
Casing oscillator owns such merits as strong adaptability to geology, high quality of completed pile, low noise, no mud contamination, slight influence to former foundation, easy control, low cost, etc. It owns advantages in following geological conditions: instable layer, underground slip layer, underground river, rock formation, old pile, erratic boulder, quicksand, foundation of emergency and temporary building.
It is especially suitable for coast, beach, old city wasteland, desert, mountain area and the place surrounded by buildings.
2. Specifications
| KRT150 Casing Oscillator Technical Specification | ||
| Casing diameter | mm | 600/800/1000/1200/1500 |
| Max. Operating pressure | Mpa | 28 |
| Max.torque | KN.m | 1500 |
| Rotation angle | o | ±10o |
| Stroke | mm | 450 |
| Max. lifting force | KN | 2050 |
| Height of Mainframe | mm | 650 |
| Overall weight | Kg | 19000 |
| Mainframe pressure | KN | 1050 |
| Balance weight pressure | KN | 900 |
| Clamping force(clamp) | KN | 2200 |
| Clamping force(sub clamp) | KN | 280 |
| Width of connection box | mm | 560 |
| Width of tail | mm | 1600 |
| Width of base frame | mm | 2720 |
| Overall length | mm | 4285 |
| Height of tail | mm | 1170 |
| Height of connection box | mm | 580 |
| Connection box pin shaft stroke | mm | 60 |
| Height of jaw | mm | 630 |
| Height of mechanical fixture | mm | 1150 |
| Overall Height | mm | 1780 |
3.Competitive Advantage
(1) Low purchase and transport costs for the shared utilization of rig pump instead of special pump truck.
(2) Low operation cost for the sharing of output power of rotary drilling rig, energy saving and environmental friendly.
(3) Ultra-large pull/push force up to 210t is supplied by lifting cylinder and the large can be achieved with added counter-weight to speed up construction.
(4) Dismountable counterweight from 4 to 10t as required.
(5) Reduction in transport cost for the counterweight is made of cast-in-place concrete.
(6) Work stably-combined action of counterweight frame and ground anchor fix the bottom of oscillator to the ground firmly and reduce the reaction torque generated by oscillator to rig.
(7) High working efficiency for the automatic casing oscillation after 3-5m casing-in.
(8) The distance between oscillator and rig can be adjusted conveniently due to bolt connections.
(9) Added anti-torsion pin of clamping collar to ensure 100% torque transfer to casing.
(10) 0.6-1.5m casing diameter with different clamping collar to meet customers’ needs.
4. Using Conditions
When the strata conditions are unstable, Casing is required to be driven to overall depth to prevent hole's collapse. It is called All Casing method (Benoto Method, Shaft Drilling).
To drive the Casing and retract it after concreting, Casing Oscillator is strongly recommended to use.
With its superior oscillating torque and lifting force, the machine shows the best performance of driving and retracting the casing.
If it is used together with Hammer Grab, it shows the fast excavating speed with its big volume of jaw and it is available for excavating gravels and boulders layer.
5. Construction Photos
