| 摘要 |
The present invention relates to a reductant tank for a construction machine, which comprises: a reductant injection pipe where an upper injection port protrudes from the top surface of a reductant tank, and whose lower part, vertically extended downward from the injection port, is positioned inside the reductant tank; an O-ring which is installed in the inner circumference of the lower part of the reductant injection pipe in order to be equivalent to the height corresponding to the maximum permissible injection amount; a guide unit which is installed on one side of the inner surface of the reductant tank in parallel with the reductant injection pipe; a connection unit which is elevated by buoyancy according to the level of a reductant along the guide unit by being connected with the guide unit at one side; and a cap unit which is installed at the other side of the connection unit. The central axis of the cap unit agrees with the central axis of the reductant injection pipe so that the cap unit can be elevated along with the connection unit according to the level of the reductant and the reductant injection pipe can be opened or closed by the cap unit. Therefore, the reductant tank for a construction can prevent backflow of the reductant to the outside or prevent damage due to volume expansion by preventing the reductant from being injected more than the needs during replenishing the reductant into the reductant tank. |
