| 摘要 |
<p>A POSITIVE DISPLACEMENT PUMP APPARATUS (10) IS DISCLOSED FOR DISPLACING A PUMPING FLUID. THE APPARATUS COMPRISES ONE OR MORE PUMP CHAMBERS (22) ARRANGED IN A PIPE SYSTEM FOR RECEIVING THE PUMPING FLUID, THE PIPE SYSTEM HAVING AT LEAST ONE INLET (21') WHICH CAN BE SHUT OFF BY MEANS OF A VALVE (24'), AND AT LEAST ONE OUTLET (21?) WHICH CAN BE SHUT OFF BY MEANS OF A VALVE (24'). THE ONE OR MORE PUMP CHAMBERS 22 ARE CONNECTED VIA AT LEAST ONE INTERMEDIATE FLUID CHAMBER (13?) WITH AT LEAST ONE DISPLACEMENT ELEMENT IN THE FORM OF A PISTON HEAD (14) AND A PISTON ROD (15), WHICH IS ARRANGED TO ALTERNATELY CARRY OUT A SUCTION STROKE AND A DISPLACEMENT STROKE DURING ITS MOVEMENT SO AS TO DISPLACE FLUID IN THE INTERMEDIATE FLUID CHAMBER (13?), WHICH THEREBY INCREASES AND REDUCES, RESPECTIVELY, THE VOLUME OF THE PUMP CHAMBER (22). AT LEAST ONE FLEXIBLE SEPARATING ELEMENT IN THE FORM OF A DIAPHRAGM (23) IS PROVIDED AT THE PUMP CHAMBER (22) TO SEPARATE THE FLUID IN THE INTERMEDIATE FLUID CHAMBER (13?) FROM THE PUMPING FLUID. FURTHERMORE, A FORCE MEANS IS PROVIDED FOR APPLYING FORCE OR ENERGY TO A SIDE OF SAID AT LEAST ONE PISTON HEAD (14) AT LEAST DURING THE DISPLACEMENT STROKE, IN SUCH A MANNER THAT SAID FORCE OR ENERGY COUNTERACTS THE FORCE EXERTED ON THE PISTON HEAD (14) BY THE FLUID IN THE INTERMEDIATE FLUID CHAMBER (13?), WHICH CAN THEREBY REDUCE THE OVERALL FORCE NEEDED TO CARRY OUT THE DISPLACEMENT STROKE MOVEMENT OF THE PISTON HEAD (14) AND A PISTON ROD (15). FIG 5A</p> |
