Shoe press for paper or board machines

D - Textiles – Paper – 21 – F

Patent

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Details

D21F 3/02 (2006.01)

Patent

CA 2303539

A shoe press for paper or board machines comprises a press shoe (200); a counter roll (312); the press shoe and the counter roll forming between themselves an extended nip (N) for a paper or cardboard web (W) and a circulated flexible belt (311); and hydraulic loading cylinders (210) for pressing the press shoe against the counter roll. First and/or second hydrostatic compartments (101; 201) are arranged in the side of the press shoe facing the counter roll and between the opposite side of the press shoe and the loading cylinders, respectively, and are adapted to be supplied with hydraulic fluid. At least one pipe (103; 203) for said hydraulic fluid supply is releasably attached to one side (104) of the press shoe in the longitudinal direction thereof, and said pipe has through holes (108; 208) in its wall, which holes each communicate with a duct (102; 202) at one end thereof, the ducts being formed in the press shoe. Said ducts open at their other end into a working chamber (201) in the loading cylinder and/or into said first hydrostatic compartment and/or into said second hydrostatic compartment.

L'invention porte sur une presse à sabot de machine à papier ou à carton comprenant: un sabot (200) presseur et une contre-calandre (312) entre lesquels de trouve une pince (N) étendue où défilent une bande (W) de papier ou de carton et une toile (311) sans fin et plusieurs vérins hydrauliques (210) de charge, montés entre un sommier horizontal (4) solidaire du bâti (5) de la presse et le sabot (1) presseur et qui pressent le sabot sur la contre-calandre. Un premier et/ou un deuxième compartiment hydrostatique (101, 201) conçus pour être alimentés en fluide hydraulique sont disposés sur le côté du sabot presseur face à la contre-calandre et entre les côtés opposés du sabot presseur et les vérins de charge. Une conduite au moins (103; 203) d'alimentation en fluide hydraulique réversiblement montée sur un côté (104) du sabot presseur dans le sens longitudinal présente dans sa paroi des trous (108; 208) communiquant chacun avec l'une des extrémités d'un passage (102; 202) formé dans le sabot presseur, et par leur autre extrémité avec le cylindre (201) d'un vérin et/ou dans le premier et/ou le deuxième compartiment hydrostatique.

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