FIELD: soil or rock drilling; mining.
SUBSTANCE: group of inventions relates to a shank adapter for drilling hard rock and a hard rock drilling device comprising said adapter. Shank adaptor comprises an elongate body having a first end to be positioned towards a piston and a second end to be positioned towards a drill string. Body comprises an axially extending internal bore to allow passage of a flushing fluid to the drill string via the second end. Adapter also comprises flush hole extending radially through the body to the internal bore. Hole is defined at an external side by an edge having an axially forward region positioned closer to the second end than an axially rearward region positioned closer to the first end. Forward-most and rearward-most regions of the edge comprise straight sections, each bordered at each end by a respective curved section.
EFFECT: technical result consists in minimising or eliminating the possibility of cracking the adapter wall.
12 cl, 4 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| SHANK ADAPTER WITH REINFORCED FLUSHING HOLE | 2016 |
|
RU2706042C2 |
| SHANK ADAPTOR WITH REINFORCED FLUSHING SLOT | 2015 |
|
RU2679933C2 |
| PERCUSSIVE ROCK DRILL BIT WITH FLUSHING GROOVES | 2014 |
|
RU2674487C2 |
| DRILL BIT WITH GROOVES IN CRUSHING SURFACE | 2015 |
|
RU2681762C2 |
| QUICK RELEASE DOWN-THE-HOLE HAMMER DRILL BIT ASSEMBLY | 2014 |
|
RU2671366C2 |
| DRILLING ROD OR ADAPTER WITH REINFORCED CONNECTING ELEMENT IN FORM OF BUSHING | 2016 |
|
RU2713548C2 |
| DRILL STRING WITH BEND RESISTANT COUPLING | 2014 |
|
RU2666801C2 |
| PERCUSSIVE ROCK DRILL BIT WITH OPTIMISED GAUGE BUTTONS | 2014 |
|
RU2658184C2 |
| DRILL BIT WITH FIXED CUTTERS WITH FLUX GUIDE | 2015 |
|
RU2675615C2 |
| ARRANGING DRILL BIT ASSEMBLY WITH SUBMERSIBLE STRIKER | 2017 |
|
RU2718705C2 |
