We present 12CO(J=2-1) molecular line archive observations made with Atacama Large Millimeter/submillimeter Array (ALMA) of the monopolar molecular outflow associated with HH 30. We identify an internal cavity as well as multiple outflowing shell structures, which are detected through of a position-velocity diagram along the jet axis, and then confirmed with the position-velocity diagrams corresponding of a set of parallel cuts at different heights above the disk midplane (0 au<z<900 au). We detect that these shells are in constant expansion (4 km/s<Vr<6 km/s) with possible rotation signatures (0<Vrot<0.5 km/s). We propose that the external shell could be the result of the entrainment material of the ambient gas by the wide angle disk wind, while the internal shell can be explained by either the multiple short episodic wind or jet outbursts from the disk.