Abstract

The present invention relates to a rock crushing apparatus. Known apparatus operate on the distinct principles of compression crushing (compression between moving surfaces) or impact crushing (compression via high velocity rock impacting a surface). Both types of apparatus have disadvantages in the quality of the crushed product, energy inefficiency or high rotor wear rates. The apparatus (1) comprises a rotor (2) comprising a number of reciprocating (11) and fixed compression crushing elements (12, 13) to compression crush the rock between adjacent reciprocating and fixed surfaces. The positioning of these elements (11, 12, 13) within the rotor performs an arresting action on the rock to limit the maximum radial velocity (Vr) the rock attains before its ejection from the compression crushing elements (11, 12, 13) for impact crushing on an adjacent surface. In this way the disadvantages of compression and impact crushing are minimized to produce a superior product.

IPC Classes  ?

• B02C 23/00 - Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in groups or not specially adapted to apparatus covered by one only of groups
• B02C 21/00 - Disintegrating plant with or without drying of the material
• B02C 13/18 - Disintegrating by mills having rotary beater elements with vertical rotor shaft, e.g. combined with sifting devices with beaters rigidly connected to the rotor
• B02C 13/28 - Shape or construction of beater elements
• B02C 13/30 - Driving mechanisms

Abstract

A drilling apparatus including a hydraulically powered hammer having a piston to impact a drill bit; a shuttle valve to control reciprocation of the piston; and an accumulator for hydraulic fluid; at least one drill rod having a first connection valve for connection of the drill rod to the connection valve of the hammer; and a second connection valve for connection of the drill rod to the first connection valve of a like drill rod or to a rotation device. The piston and shuttle valve are positioned substantially in-line to the axis of movement of the hammer. The accumulator is positioned proximate to the shuttle valve; and the first connection valve, and second connection valve having at least one poppet valve positioned proximate to a corresponding valve seat.

IPC Classes  ?

• E21B 4/14 - Fluid operated hammers
• E21B 17/06 - Releasing-joints, e.g. safety joints

Abstract

A drilling apparatus including a hydraulically powered hammer having a piston to impact a drill bit; a shuttle valve to control reciprocation of the piston; and an accumulator for hydraulic fluid; at least one drill rod having a first connection valve for connection of the drill rod to the connection valve of the hammer; and a second connection valve for connection of the drill rod to the first connection valve of a like drill rod or to a rotation device. The piston and shuttle valve are positioned substantially in-line to the axis of movement of the hammer. The accumulator is positioned proximate to the shuttle valve; and the first connection valve, and second connection valve having at least one poppet valve positioned proximate to a corresponding valve seat.

IPC Classes  ?

• E21B 4/14 - Fluid operated hammers
• E21B 17/06 - Releasing-joints, e.g. safety joints

Abstract

The present invention relates to a rock crushing apparatus. Known apparatus operate on the distinct principles of compression crushing (compression between moving surfaces) or impact crushing (compression via high velocity rock impacting a surface). Both types of apparatus have disadvantages in the quality of the crushed product, energy inefficiency or high rotor wear rates. The apparatus (1) comprises a rotor (2) comprising a number of reciprocating (11) and fixed compression crushing elements (12, 13) to compression crush the rock between adjacent reciprocating and fixed surfaces. The positioning of these elements (11, 12, 13) within the rotor performs an arresting action on the rock to limit the maximum radial velocity (Vr) the rock attains before its ejection from the compression crushing elements (11, 12, 13) for impact crushing on an adjacent surface. In this way the disadvantages of compression and impact crushing are minimised to produce a superior product.

IPC Classes  ?

• B02C 25/00 - Control arrangements specially adapted for crushing or disintegrating
• B02C 1/10 - Shape or construction of jaws
• B02C 13/26 - Disintegrating by mills having rotary beater elements Details
• B02C 1/02 - Jaw crushers or pulverisers
• B02C 4/00 - Crushing or disintegrating by roller mills
• B02C 13/10 - Disintegrating by mills having rotary beater elements with horizontal rotor shaft and axial flow
• B02C 13/286 - Feeding or discharge

Abstract

The present invention relates to a hydraulic "down-the-hole" (DTH) percussion drilling apparatus for drilling holes in a terrain. Known DTH drilling apparatus are inefficient in terms of loss of hydraulic fluid during coupling and uncoupling of components such as drill rods; and sub-optimal mechanical efficiency. The apparatus of the present invention comprises a hydraulically powered hammer comprising a piston to impact a drill bit; a shuttle valve to control reciprocation of the piston; and an accumulator for hydraulic fluid which is positioned proximate to the shuttle valve. Both the piston and shuttle valve are positioned substantially in-line to the axis of movement of the hammer.

IPC Classes  ?

• E21B 4/16 - Plural down-hole drives, e.g. for combined percussion and rotary drillingDrives for multi-bit drilling units