Plug connector for quick-release connection of pressurized lines

A plug connector (1) for releasable connection of a pressurized line (2), the plug connector comprising:

• a housing body (4) with a receiving opening (6) for insertion of one end (2a) of the line (2), and with an inner sleeve (8) attached in the housing body (4) in an arrangement extending coaxially within the receiving opening (6) for engagement into the inserted line end (2a);
• a clamping element (12) mounted in the line end to move axially in the receiving opening (6) in cooperative relation with an inner conical surface (14) or stepped surface (14a) of the housing body (4) to secure the pressurized line (2) and acting radially inward against an outer periphery of the line (2) with at least one retaining edge (16) in form-fitting or friction- and form-fitting fashion;
• wherein the inner sleeve (8) is rigidly attached media-tight around its periphery in the housing body (4) via a connection means (20) and engages with a sealing means (22) media-tight around the periphery into the pressurized line (2a);
• wherein the inner sleeve (8) has at least one sealing torus (24) on its outer periphery as the sealing means (22), the sealing torus having an outside diameter slightly larger than the inside cross section of the line (2), so that the line (2) can be mounted frictionally onto the inner sleeve (8) with slight elastic expansion and removed from the inner sleeve, with internal sealing obtained in the mounted state;
• and
• wherein the sealing torus (24) of the inner sleeve (8), viewed axially, is arranged substantially in a region in which the retaining edge (16) of the clamping element (12) also lies in a position that secures the line (2), so that the retaining edge (16) of the clamping element (12) and the sealing torus (24) support each other with respect to their sealing and holding properties.