The drilling unit
The drilling unit consists of a drill pipe and a position unit, which are mounted on hydraulic powered carriages. Both carriages are powered by hydraulic engines and are horizontally movable mounted on a boom. This unit can be mounted on a technical suitable serial digger. The hydraulic engines are provided by the hydraulic of the digger.
The drill pipe consists of a double-walled pipe, at which a diamond tipped, water-cooled drill bit is installed. By the double-walled model, the cooling water is directly leaded to the drill bit, to make possible an ideal cooling of the drill bit. The rotation results from a hydraulic gear, which is also provided by the hydraulic of the digger. The cooling water is supplied by the operator.
The position unit consists of a lance, on which the repair kit is inserted, as well as a multi-bin mailbox in which four standard captive-bolt pistols with magazine are mounted. A power unit with gear turns the captive-bolt pistol in the appropriate working positions. The power unit and the shot cylinder for the operation of the captive-bolt pistol are provided by the hydraulic of the digger.
The horizontal cross adjustment before and between the working steps results from a hydraulic cylinder, which is provided by the digger too.
The water, which is required for the cooling of the drilling process, is supplied in sufficient amount and pressure through the water network of the operator. For this purpose, pipes are installed to the digger and connected to the drilling unit.
After this, the captive-bolt pistols with magazine will be mounted at the machine. The new repair kit will be completely put back on the position unit.
The machine moves into the working position and is fixed. The drill pipe is moved in position. The old repair kit is removed cleanly by a water-cooled tapping drill hole. The position unit is cross operated in position. The new repair kit will be brought in position and fixed by means of the captive-bolt pistol. The whole work proceeding is steered by the operator in his cabin or optional from a safe distance with a remote control.