| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an exhaust device of a construction machine, capable of taking cooling air of a sufficient flow rate into an exhaust pipe and suppressing the outflow of the cooling air which enters the inside of the exhaust pipe. <P>SOLUTION: The exhaust device of the construction machine includes: a turning body 3 provided with a machine chamber 5; a heat exchanger 17 for cooling an engine 19 provided inside the machine chamber 5; a fan 16 for generating the cooling air to be guided to the heat exchanger 17; an after-treatment device 18 provided on the downstream side of the flow of the cooling air which passes through the heat chamber 17, for purifying the exhaust gas of the engine 19; an exit pipe 18a provided on the after-treatment device 18, for discharging purified exhaust gas; and an exhaust pipe 10 provided with an extrapolation part 10A extrapolated to the exit pipe 18a at an interval in the radial direction on the proximal end side and provided with a discharge port 10B on the other end side, for guiding the exhaust gas discharged from the exit pipe 18a to the outside of the machine chamber 5. The extrapolation part 10A of the exhaust pipe 10 is formed such that an extrapolation amount to the exit pipe 18a is increased more on the downstream side than on the upstream side of the flow of the cooling air. <P>COPYRIGHT: (C)2012,JPO&INPIT |
