| 摘要 |
<p>The rapid coupling (2) according to the invention serves to couple a pump to a conduit, particularly to a pressure conduit of a transfer tank (1). The rapid coupling (2) comprises a fixed pipe flange (10) secured to an end of the pressure conduit and a coupling pipe flange (11) secured to the pressure conduit (4) connected to the pump. One of the pipe flanges is provided with a sealing element (21) and a vertical, external coupling wedge (14), whereas the other of the pipe flanges has a sealing face (20) and a connecting claw (13) fitting to the external coupling wedge (14). At either end of the horizontal diameter of the fixed pipe flange (10) a respective external coupling wedge (14) is situated, whose wedge faces are oriented in a direction pointing away from the coupling pipe flange (11). Adjacent the external coupling wedges (14) further vertical, lateral guide faces (15) are provided which are oriented radially outward. The coupling pipe flange (11) is bilaterally provided with connecting claws (13) which have guide faces (16, 19) and which fit to the coupling wedges (14) and the lateral guide faces (15). The guide faces (16) of the connecting claws (13) fitting to the coupling wedges (13) are vertical (17) and, in given circumstances, may be provided at the bottom with a chamfer (18) extending obliquely outward from the sealing face (20). The lateral guide faces (15) of the fixed pipe flange (10) may be wedge surfaces or may be the outer superficies of the pipe flange. The wedges of the rapid coupling have a wedge angle which is expediently greater than that for self-locking. In an expedient embodiment of the rapid coupling according to the invention the coupling pipe flange (11) is integral with the coupling housing (12) which, in turn, is structured as a T-joint that accommodates a check valve (22), expediently formed as a ball-type check valve.</p> |
