EXHAUST GAS PROCESSING DEVICE

摘要

A front side flange portion (34B) and a rear side flange portion (34C) of a filter accommodating cylinder (33) respectively are provided with positioning pins (40), a flange portion (23C) of an upstream cylinder (22) is provided with a notched groove (24) and a flange portion (29C) of a downstream cylinder (28) is provided with a notched groove (30). In consequence, when the filter accommodating cylinder (33) is connected between the upstream cylinder (22) and the downstream cylinder (28), each of the positioning pins (40) disposed at the front and rear flange portions (34B, 34C) of the filter accommodating cylinder (33) is engaged with each of the notched groove (24) of the upstream cylinder (22) and the notched groove (30) of the downstream cylinder (28). The filter accommodating cylinder (33) can be positioned to be coaxial with the upstream cylinder (22) and the downstream cylinder (28). As a result, after performing a cleaning operation to a DPF (35), an operation of once again connecting the filter accommodating cylinder (33) between the upstream cylinder (22) and the downstream cylinder (28) can be quickly and easily performed.