| 摘要 |
<p>A coupling for coupling together pipe sections comprises a first coupling section (1) and a second coupling section (2) that can be coupled to the first coupling section and can be locked relative to the first coupling section in the direction of coupling. The two coupling sections are each provided with a male connecting part (5) and a female connecting part (6). A spring-loaded non-return valve (7) is accommodated in the male connecting part (5) of each coupling section, which non-return valve acts towards the free end of the male connecting part. Each of the two coupling sections (1, 2) is provided with a shut-off element composed of two discs (10, 11) resting against each other, each provided with two bores (12) situated diametrically opposite each other. In the uncoupled state of the two coupling sections the bores in the one disc are covered by the other disc. In the coupled state the two discs are rotatable relative to each other, for opening the ducts (3, 4). <IMAGE></p> |
