COMPRESSION-TYPE FILTER PRESS, METHOD FOR FILTERING AND COMPRESSING BY FILTER PRESS, AND METHOD FOR CONTROLLING OIL-HYDRAULIC PRESSURE OF COMPRESSION-TYPE FILTER PRESS

摘要

IT BECOMES POSSIBLE TO SHORTEN A TIME FOR TIGHTENING BY A FILTER PLATE TIGHTENING DEVICE AND TO INCREASE A TIGHTENING PRESSURE WITH A SUFFICIENT TOLERANCE TO A HIGH COMPRESSION PRESSURE.A FILTER PRESS 1 FOR TIGHTENING FILTER PLATES 3, 4 BY AN OIL-HYDRAULIC CYLINDER 10. THE OIL-HYDRAULIC CYLINDER 10 IS COMPOSED OF A FIRST OIL-HYDRAULIC APPARATUS MADE UP OF A OUTER CYLINDER 11 AND A FIRST PISTON 123, AND A SECOND OIL-HYDRAULIC APPARATUS MADE UP OF A SECOND CYLINDER 12 WHICH IS LINKED TO THE FIRST PISTON AND IS INSERTED INTO THE FIRST OIL-HYDRAULIC APPARATUS AND A PISTON 133 EXTENDING FROM A FIRST CYLINDER 11 AND IS FIXED TO THE TOP END OF A ROD 134 EXTENDING THROUGH THE FIRST PITON. THE FIRST OIL-HYDRAULIC APPARATUS IS CONNECTED TO A HIGHER-PRESSURE PUMP 15 WHILE THE SECOND OIL-HYDRAULIC APPARATUS IS CONNECTED TO A LOWER-PRESSURE PUMP 14. THE LOWER-PRESSURE PUMP 14 IS MAINLY USED FOR STROKES OF THE SECOND CYLINDER, WHEREAS THE HIGHER-PRESSURE PUMP 15 IS MAINLY USED FOR ADDITIONAL TIGHTENING DURING COMPRESSING.