Hole plug

摘要

Hole plugs for the injection of, in particular, media suitable for rock grouting, such as, for example, synthetic resin, consist essentially of a filling tube with a non-return valve arranged at the tip and designed as an anti-backflow safeguard, of a holding element arranged behind the non-return valve on the filling tube, and of a hose portion of flexible material surrounding the filling tube, supported at the ends in sleeves and designed as a sealing element. To avoid twisting of the flexible hose portion designed as the sealing element and to guarantee reliable sealing, the sleeves (3, 4) accommodating the sealing element (2) are produced from an elastically deformable material, the sleeve (3) remote from the bottom of the drilled hole being provided with an inner tube (8) which allows it to be displaced on the filling tube (1) and surrounding the sealing element (2) with a ring-like portion (9), and the split sleeve (4) facing the bottom of the hole being provided with an internal thread (10) which allows it to be screwed onto the filling tube (1) and, in conjunction with a wedge sleeve (14), which can be pushed onto the filling tube (1) and reaches at least partially under the sealing element (2), and with expandable wings (12) which overlap the wedge sleeve (14) and the sealing element (2), is designed as a retaining element (15).
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