| 摘要 |
<p>Disclosed is an exhaust gas purification device wherein reductant injected from a reductant supply device is prevented from being introduced to an opening formed in an exhaust pipe, which is designed to pass the reductant through, by a simple structure. The exhaust gas purification device is comprised of an aftertreatment device (15) which is provided in an exhaust system of an engine (10) and which reduces and purifies a nitrogen compound by urea water supplied from a urea water injection device (16). The exhaust gas purification device is provided with a first exhaust pipe portion (13) through which exhaust gas is discharged, and a second exhaust pipe portion (14) formed in the form of a cylinder having a bottom. The aftertreatment device is connected to an end of the second exhaust pipe portion, opposite to the bottom, and an opening (60) designed to pass the urea water through is formed in the bottom. An introduction port (40) communicating with the first exhaust pipe portion (13) is formed in the side portion adjacent to the bottom. An annular protrusion (51) which is projected so as to surround the periphery of the opening (60), is provided on the inner surface (53) of the bottom.</p> |
