| 摘要 |
The device comprises an injection tube (1) which is inserted into the ground to distribute the liquid at a given depth. Similar devices are known, which, however, have inter alia the disadvantage that said liquid rises back up along the tube and disperses on the surface of the ground. The illustrated device, however, is designed in such a manner that this does not happen because, once the injection tube (1) has been installed in the ground, the liquid emerges through openings (15, 16, 17, 18, 19) which do not come into contact with the surrounding ground since they are provided on a part (5) of polygonal shape with a radial dimension which is smaller in relation to the circumference (23) of the tube. There thus come to be formed on the injection tube (1) shoulder-type surfaces or flanges (24, 25) which prevent the liquid rising back up along the tube and dispersing on the surface of the ground. <IMAGE> |
