The utility model provides a kind of impedance composite formula pipeline
muffler, four means of
physical barrier, material sound absorption,
cavity resonance,
airflow dredge are passed through in this design, realize the efficient control of full-band
noise, it includes shell outer plate, the both ends of shell outer plate are communicated with reducing
pipe, two reducing pipes are communicated with connecting
pipe, two connecting pipes are communicated with butt
flange, shell outer plate is sequentially provided with cylindrical sound-absorbing structure, sound-absorbing
sheet structure and flow diffuser from top to bottom in it, cylindrical sound-absorbing structure is contacted with a connecting
pipe, flow diffuser is communicated with another connecting pipe, the inside of shell outer plate is provided with damping layer, the inside of damping layer is provided with annular sound-absorbing cotton, the inside of annular sound-absorbing cotton is provided with
metal ring, multiple perforated plates are set on the
metal ring, the cylindrical sound-absorbing structure includes
metal pipe, the inside of metal pipe is provided with cylindrical sound-absorbing cotton.