Exhaust gas treatment device for construction machine

Abstract

An exhaust gas treatment apparatus for a construction machine is provided, which is connected to a diesel particulate filter trap (DPF) to discharge exhaust gas from an engine to outside through the DPF. The exhaust gas treatment apparatus for a construction machine includes a tail pipe main body provided with a plurality of ventilation holes penetratingly formed on the tail pipe main body to allow the outside air to pass through the ventilation holes, and installed on an outlet of the DPF; an exhaust heat dissipation unit provided with a plurality of tubes which respectively communicate with the ventilation holes, and are installed in a horizontal direction of the tail pipe main body; and a plurality of exhaust holes located in a longitudinal direction of the tubes and penetratingly formed in an exhaust gas discharge direction.

1 . An exhaust gas treatment apparatus for a construction machine, which is connected to a diesel particulate filter trap (DPF) to discharge exhaust gas from an engine to outside through the DPF, comprising:
 a tail pipe main body provided with a plurality of ventilation holes penetratingly formed on the tail pipe main body to allow the outside air to pass through the ventilation holes, and installed on an outlet of the DPF;   an exhaust heat dissipation unit provided with a plurality of tubes which respectively communicate with the ventilation holes, and are installed in a horizontal direction of the tail pipe main body; and   a plurality of exhaust holes located in a longitudinal direction of the tubes and penetratingly formed in an exhaust gas discharge direction.   
     
     
         2 . The exhaust gas treatment apparatus for a construction machine according to  claim 1 , wherein vertical cross-sections of the tail pipe main body and the tube are in a circular shape. 
     
     
         3 . The exhaust gas treatment apparatus for a construction machine according to  claim 1 , wherein three or five exhaust holes are provided in the longitudinal direction of the tubes and in the exhaust gas discharge direction. 
     
     
         4 . The exhaust gas treatment apparatus for a construction machine according to  claim 2 , wherein three tubes are provided in the horizontal direction on the same surface of the tail pipe main body.