Quick coupling

The quick coupling according to any one of the preceding claims, characterised in that by way of the pressure-relief connection lines (52A, 52B, 52C) the central pressure relief device (70) is connectable by way of at least one nonreturn valve (114,116) to each of the pressurised lines (Lx).

The quick coupling according to any one of the preceding claims, characterised in that the plug-in part (12) comprises a first sealing device (30) between a second medium channel (68) and a chamber (34), and comprises a third sealing device (38) between a ram (28) and a second housing (22).

The quick coupling according to any one of the preceding claims, characterised in that the socket part (14) comprises a fourth sealing device (88) between a slide element (26) and the first housing (20), which comprises a first and a second housing element (62, 64).

The quick coupling according to any one of the preceding claims, characterised in that in a coupling procedure of the coupling parts (plug-in part, socket part) (12, 14) from the non-coupled position to the coupled position (P1, P2), at the same time the first and the second connection blocks (16, 18), or the first and the second connection blocks with the arranged additional block (16, 18, 84) are reversibly displaceable in relation to each other.

The quick coupling according to any one of the preceding claims, characterised in that in a first coupling step the first guide pin (working ram) (42) and the control socket (44) are axially displaced, as a result of which the first medium channel (66) in the coupling part (14) (socket part) is connected to an elimination valve (49), wherein by way of the control cam (54) of the control socket (44) the pressure-relief valve system (50) is opened by operating the pressure relief valve (72), and the pressure-relief connection lines (52A to 52D) to the pressure relief chamber (46) and to the connecting pressure relief line (48) are released to generate pressure equalisation.

The quick coupling according to any one of the preceding claims, characterised in that in a second coupling step the first guide pin (working ram) (42) of the control socket (44) is further axially displaceable and while at the same time releasing the fourth sealing device (88) connects the chamber (34) to the first medium channel (66) in the socket part (14) right up to the elimination valve (49), wherein the control cam (54) of the control socket (44) keeps the pressure-relief valve system (50) open and releases the pressure-relief connection lines (52A to 52D) to the pressure relief chamber (46) and to the connecting relief line (48) to generate pressure equalisation up to the chamber (34) within the quick coupling (100).

The quick coupling according to any one of the preceding claims, characterised in that after the second coupling step, in a third coupling step a pressure reduction element (56) is openable by operating a pressure pin by means of the ram (28) in the first sealing device (30), as a result of which a first pressure equalisation between the second medium channel (68) of the chamber (34) can be generated by way of the first medium channel (66) right up to the elimination valve (49).

The quick coupling according to any one of the preceding claims, characterised in that in a fourth coupling step by further axial displacement of the first guide pin (working ram) (42), for complete pressure equalisation and at the same time complete release of the first sealing device (30), the chamber (34) in the coupling part (12) (plug-in part) to the second medium channel (68) opens, as a result of which a first pressure equalisation between the second medium channel (68) and the chamber (34) can be generated by way of the first medium channel (66) right up to the elimination valve (49) and the control socket (44) is completely inserted in the pressure-relief valve system (50), after which the control cam (54) of the control socket (44) is led past the pressure-relief valve system (50), and the pressure-relief connection lines (52A to 52D) to the pressure relief chamber (46) and to the subsequent pressure relief line (48) close while pressure builds up in the quick coupling (100).

The quick coupling according to any one of the preceding claims, characterised in that in the coupled position (P2) the first connection block (coupling block) (16) and the second connection block (18) provide sealing by means of a second sealing device (36) between the first face (17) of the first connection block (coupling block) (16) and the second face (19) of the second connection block.

A quick coupling for connecting at least two pressurised lines to a first coupling part that is connectable to a second coupling part so as to be pressure-proof, characterised by an externally arranged central pressure relief device (70) which by way of pressure-relief connection lines (52) is connectable to the pressurised lines (Lx), wherein the coupling parts are reversibly movable from a non-coupled position (P1) to a coupled position (P2) by a lever element (92), and are lockable into place.