FIELD: construction.
SUBSTANCE: invention is related to the field of construction, namely to expansion of well in ground formed by means of pneumatic punches. Expander comprises thrust rim on pneumatic punch body, composite sections from two half-rings, having indents and protrusions in their ends, which are accordingly engaged to each other and therefore, form a ring. Half-rings are connected to each other by means of flexible joint arranged on one end of adjacent connection of half-rings, and the other end of one half-ring is equipped with accessory for flush fixation of rip cord. Surface sides of protrusions and indents are arranged as inclined, which increases forces of rings engagement to each other.
EFFECT: higher reliability of device operation and simplified design.
3 cl, 4 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| SOIL WELL REAMER | 2010 |
|
RU2406814C1 |
| UNDERREAMER OF GROUND WELLS | 2007 |
|
RU2436901C2 |
| BLIND HOLE MAKING METHOD | 2003 |
|
RU2236513C1 |
| GROUND HOLE REAMER | 1994 |
|
RU2057887C1 |
| DEVICE FOR WIDENING BORE-HOLES IN GROUND | 1996 |
|
RU2109910C1 |
| DEVICE FOR CAST-IN-PLACE PILE FORMING IN GROUND | 2000 |
|
RU2250959C2 |
| EQUIPMENT FOR MAKING HOLES IN GROUND | 0 |
|
SU1788157A1 |
| GEAR TO SINK HOLE IN GROUND AND PROCESS OF FORMATION OF EXPANSION IN END OF HOLE WITH ITS USE | 2001 |
|
RU2186928C1 |
| APPARATUS FOR FORMING WELLS | 0 |
|
SU1025859A1 |
