| 摘要 |
<p>The coupling device includes a casing part (1) and a nipple part (2), both provided with a flow-through channel. The nipple part (2) is designed to be inserted into the flow-through channel of the casing part (1) partly to open a spring-loaded shut off valve (20, 21, 22) and thereby open a flow-through path through the coupling device. Furthermore, the nipple part (2) is designed to hold said valve (20, 21, 22) and flow-through path open and the two main parts (1, 2) of the coupling device connected to each other, for which latter purpose said nipple part is releasably engaged in a ball locking device or similar locking device in the casing part (1). The shut off valve in the flow-through channel inside the casing part (1) comprises two cooperating valve parts (21, 22), both of which, under the influence of the nipple part (2), are axially movable in said channel both relative each other and relative the channel. That which is most characteristic for the quick coupling device according to the invention is that one part (22) of the shut off valve is arranged inside an at least essentially casing-shaped member (23) which can be moved along a segment being included in the leading to and from said channel segment, the openings (19) leading to said segment being included in the flow-through channel through the quick coupling device and the openings (24, 26, 27) leading from said segment communicating with the immediate surroundings of the quick coupling device for pressure evacuation of the interior (45) of the flow-through channel in the casing part when the nipple part (2) is removed from the same while the flow-through channel input end (18, 19) in the casing part is still under pressure.</p> |
