Concrete pump with distributing boom

A concrete pump having a stationary or mobile frame (10, 10′, 10″) with a sub-structure (14, 14′, 14″) which is fixed to the frame, having a rotating head (32) which is mounted on a bearing block (35) of the sub-structure so as to be rotatable by means of a drive mechanism (33) about a vertical rotation axis (30), having an outrigger (16) which is configured as a concrete distributing boom and supports a conveying line and which is articulated on a bearing point (36) of the rotating head (32) so as to have a horizontal pivot axis, and having a hydraulic cylinder-and-piston unit (40) which by way of its ends (42, 44) which are fixed to the cylinder and to the piston rod, respectively, is articulated in each case on one outrigger-side, and rotating head-side articulation point (46, 48) which is disposed so as to be spaced apart from the bearing point (36) and has in each case a horizontal articulation axis, wherein the conveying line (22) by way of a supply pipe (110) which is fixed to the sub-structure and a connection pipe (108, 112) which penetrates centrally through the rotating head (32) is impingeable with liquid concrete, which connection pipe on its one end by way of a rotating joint (111) which is coaxial in relation to the vertical rotation axis (30) of the rotating head (32) is connected to the supply pipe (110) and on its other end by way of a rotating joint (84) which is coaxial in relation to the horizontal pivot axis (38) of the outrigger (52) is connected to the outrigger-side conveying line (22), wherein the rotating head (32) has a base part (50) which is disposed on the bearing block (35) and an adaptor piece (52) which comprises the bearing point (36) for the outrigger (16) and the rotating head-side articulation point for the cylinder and piston unit (40), wherein the base part (50) and the adaptor piece (52) are releasably intercoupled by way of a separation point (54), wherein the connection pipe (108, 112) is subdivided into a first part-pipe (112) which is connected to the base part (50) and connected to the supply pipe (110) and a second part-pipe (108) which is connected to the adaptor piece (52) and connected to the outrigger-side conveying line (22), wherein the first and the second part-pipes (112, 108) by way of a pipe coupling (90) are releasably intercoupled in the region of the separation point (54), and wherein the base part (50) and the adaptor piece (52) on their separation point (54) have coupling elements which in pairs are interconnectable in a form-fitting manner, wherein a first group of coupling elements are configured as drop-in elements (56, 57;

• 56′, 57′) and a second group of coupling elements are configured as receptacles (58, 59) for the drop-in elements, and wherein the adaptor piece (52) is provided with two drop-in elements (56, 57;
• 56′, 57′) or drop-in element pairs, and the base part (50) is provided with two receptacles (58, 59) or receptacle pairs which are open toward the top of the periphery and which in each case at least in the vertical direction are mutually spaced apart (s).