Coupling element for connecting a first fluid-carrying line to a second fluid-carrying line and a coupling arrangement

摘要

Coupling element (4) for connecting a first fluid-carrying line (2) to a second fluid-carrying line (3), the coupling element (4) being connectable to the first line (2) and for receiving one connectable to the second line (3) and an at least partially circumferential locking collar (6) having a coupling counter-element (5) is designed, wherein the coupling element (4) has a locking device (9) which has a base body (10) and an elastically deformable ring (10) arranged on the base body (10). 11) with at least one locking projection (12) protruding inward in the radial direction, with a locking receptacle (17) between an end stop surface (16) of the base body (10) and a locking surface (15) of the locking projection (12) as seen in the axial direction Receiving the locking collar (6) is present, and wherein the ring (11) and the locking projection (12) are designed such that the locking projection (12) when connecting the coupling element (4) un d of the coupling mating element (5) is deflected elastically outward in the radial direction by the locking collar (6) and, after the locking collar (6) has been arranged in the locking receptacle (17), assumes a locking position in which it holds the locking collar (6) to hold the coupling mating element (5) engages behind in a latching manner with respect to the coupling element (4), an indicator device (18) being mounted on the latching device (9) and having a holding element (23) which can be elastically deflected in the radial direction with respect to a guide element (19) of the indicator device (18), characterized in that the holding element (23) engages in an engaged position in the latching receptacle (17) and the indicator device (18) fixes in the axial direction by interacting with the base body (10), and is in a disengaged position outside the latching receptacle (17) and releases the indicator device (18) for displacement in the axial direction, the indicator device (18) when the retaining element is arranged ts (23) is released in the disengaged position for displacement between a first position and a second position, wherein in the first position a retaining projection (28) of the retaining element (23) is present in overlap with the latching receptacle (17) viewed in the axial direction, and wherein in the second position the indicator device (18) cooperates with the ring (11) in order to prevent displacement beyond the second position, and the holding element (23) engages with the locking collar (6).