| 摘要 |
The invention relates to a plug valve (10) for controlling a fluid flow in a fluid line of a medical instrument, comprising a housing (12), through which a channel (14) passes, wherein, within the housing (12), the channel (14) breaks through a seat surface of a conical seat (16), which is formed in the housing (12), at two mouth points (22), a conical plug (18), which is rotatably supported in the conical seat (16) and has a passage (20), wherein the conical plug (18) can be rotated into an open position and a closed position in such a way that the passage (20) communicatively connects the two mouth points (22) of the channel (14) in the open position of the conical plug (18) and that the channel (14) is blocked by a wall of the conical plug (18) in the closed position of the conical plug (18), and a retaining element (32), which reaches through an opening (24) of the housing (12) in the narrowed bottom region of the conical seat (16) and is detachably connected to a spring unit (28) supported on the housing (12), wherein the spring unit (28) pulls the conical plug (18) at the retaining element (32) into the conical seat (16) under spring preload, wherein a screw connection is provided as a detachable connection between the retaining element (32) and the spring unit (28), and wherein a thread provided in a body part of the spring unit (28) for the screw connection is formed of a thread wire (36) wound in a thread shape. |
