초록 ▼

The coupling, preferably designed as a quick-acting coupling, has two sealing members (2, 3) in which the sealing surfaces are of a material having the same coefficient of thermal expansion, in particular a hard metal and having an exact clearance fit exactly inside each other without taper or press

The coupling, preferably designed as a quick-acting coupling, has two sealing members (2, 3) in which the sealing surfaces are of a material having the same coefficient of thermal expansion, in particular a hard metal and having an exact clearance fit exactly inside each other without taper or pressure. There is thus no need for sealing rings, with the result that the coupling is maintenance and trouble-free and can be used for aggressive fluids as well as over a wide temperature range.

대표청구항 ▼

A coupling for fluid conduits, comprising a first and a second coupling member (2, 3), said first coupling member (3) including a first hollow space (36) and said second coupling member (2) including a second hollow space (35) to be connected to the respective fluid conduits, said first and said sec

A coupling for fluid conduits, comprising a first and a second coupling member (2, 3), said first coupling member (3) including a first hollow space (36) and said second coupling member (2) including a second hollow space (35) to be connected to the respective fluid conduits, said first and said second hollow space (35) each having a front wall (42), said first coupling member (3) having an annular projection (22) with a cylindrical outer metallic sealing surface (27), said second coupling member (2) having a first bore with a cylindrical metallic sealing surface (25), said cylindrical outer metallic sealing surface (27) of said annular projection (22) fitting in said cylindrical metallic sealing surface (25) of said first bore such that in the coupled state (FIG. 2) the two metallic sealing surfaces (25, 27) tightly adjoin to one another and are separated from one another only by a clearance fit being so small that the fluid cannot escape between the sealing surfaces (25, 27), said first coupling member (3) including a second bore with a cylindrical metallic sealing surface (32) extending axially throughout said annular projection (22) and through said front wall (42) into said first hollow space (36). said second coupling member (2) including a third bore with a cylindrical sealing surface (31) extending from the rear end of said first bore (25) through said front wall (42) into said second hollow space (35), a first and a second closure bolt (5) for closing the first and second coupling member (3) in the uncoupled state (FIG. 1) and opening them for communication with one another in the coupled state (FIG. 2), said first and second closure bolt (5) having a port and guide front part (41) and a cylindrical sealing back part (40), the first port and guide front part (41) as well as the first sealing back part (40) being designed to slide in the second bore (32) and the second port and guide front part (41) as well as the second sealing back part (40) being designed to slide in the third bore (31), the first and second cylindrical sealing back part (40) each being provided at its rear end with a stop (39), lying in the first and respectively second hollow space (36, 35) and loaded by a spring (6) connected to urge the stop (39) towards the front wall (42) of the first and respectively second hollow space (36, 35), the first and second port and guide front part (41) abutting one another during coupling and thereby being pushed backwards against the forces of said springs (6), so that they are lying in the coupled state (FIG. 2) in the second and respectively third bore (32, 31), the port and guide front part being so designed that on the one hand it slides and is thereby guided in the second and respectively third bore (32, 31) and on the other hand fluid can flow therethrough, the first and the second sealing back part each having a cylindrical outer metallic sealing surface (40) fitting in the cylindrical metallic sealing surface (32, 31) of the second and respectively third bore and lying in the coupled state (FIG. 2) in the first and respectively second hollow space (36, 35) and, in the uncoupled state (FIG. 1), tightly in the second and respectively third bore (32, 31), the metallic sealing surfaces (32, 31, 40) of the sealing back parts and the second and respectively third bore being separated from one another only by a clearance fit being so small that the fluid cannot escape between the sealing surfaces.