Scraper device for discharging filter cake on filter plate of pressure filter

A scraper device for a filter plate of a filter press, the scraper device comprising:

• a fixed frame comprising two main beams;
• a movable frame comprising two bases, a lower frame crossbeam, and four first columns, each comprising an upper end and a lower end disposed opposite to the upper end;
• and
• a lifting frame comprising four second columns, each second column comprising an upper end and a lower end disposed opposite to the upper end;
• two upper crossbeams each comprising a first end and a second end disposed opposite to the first end;
• two lower crossbeams;
• two connecting plates;
• and two slide plates, each slide plate comprising an upper end, a lower end, and two anchor pins disposed respectively at the upper end and at the lower end;
• a scraper assembly comprising two scrapers and four cylinder assemblies, each cylinder assembly comprising a first end, a second end opposite to the first end, and a piston rod disposed at the second end;
• and
• two gear racks;
• two gears;
• two chain gears;
• two chains;
• four cylinder bases;
• four fixed clamping plates;
• four first pin rolls;
• four moveable clamping plates;
• and four second pin rolls;
• wherein:
• said two main beams are parallel to each other;
• the lower ends of a first and a second of said four first columns are fixed to a first of said two bases, and the lower ends of a third and a fourth of said four first columns are fixed to a second of said two bases;
• said two upper frame crossbeams are parallel to each other, and are connected respectively between said first and said third of said four first columns and between said second and said fourth of said four first columns;
• said two upper crossbeams are connected respectively between the upper ends of a first and a second of said four second columns and between the upper ends of a third and a fourth of said four second columns;
• said two lower crossbeams are connected respectively between the lower ends of said first and said second of said four second columns and between the lower ends of said third and said fourth of said four second columns;
• said two connecting plates are connected respectively between the first ends of said two upper crossbeams and between the second ends of said two upper crossbeams, and said two slide plates are disposed each on one of said two connecting plates;
• said two gear racks are disposed each on one of said two main beams;
• and said two gears are engaged each with one of said two gear racks;
• and said two bases are disposed each on one of said two gear racks through one of said two gears;
• whereby said movable frame is movable along said two main beams;
• said two chain gears are disposed respectively between the upper ends of said first and said second of said four first columns and between the upper ends of said third and said fourth of said four first columns;
• said two chains are engaged each with one of said two chain gears;
• and said two slide plates are connected each to one of said two chains through said anchor pins;
• whereby said lifting frame is moveable upward and downward with respect to said movable frame;
• and
• said four cylinder bases are connected each to the lower end of one of said four second columns;
• said four fixed clamping plates are fixed each to one of said four cylinder bases;
• each of said four moveable clamping plates is connected to one of said four fixed clamping plates through one of said four first pin rolls, and is pivotable around said one of said four first pin rolls;
• the first ends of said four cylinder assemblies are connected each to one of said four cylinder bases;
• said piston rods of said four cylinder assemblies are connected each to one of said four moveable clamping plates through one of said four second pin rolls, each piston rod is movable away from or towards the first end of each cylinder assembly and is pivotable around said one of said four second pin rolls;
• and said two scrapers are connected each between two of said four moveable clamping plates, and are parallel to said lower frame crossbeam of said moveable frame;
• whereby said two scrapers are movable towards or away from each other for clamping or unclamping the filter plate of the filter press.