Silo scales

G - Physics – 01 – G

Patent

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Details

G01G 3/12 (2006.01) G01G 21/23 (2006.01)

Patent

CA 2603284

The invention relates to silo scales which comprise at least three tubular supports (5), especially for retrofitting existing silos (1) and for determining the filling level of such silos. The invention is based on the principle that a tubular support is exposed to a reversible elongation of its diameter by an axial force. For this purpose, every support (5) is provided with a longitudinal slot (6) that extends in parallel to its axis and with a hole (8) that extends at an angle to the plane of the longitudinal slot (6) and through the diameter of the support (5). A connecting rod (9) extends through the hole (8) and is secured by a nut (15) on one end. It is non- positively fastened on the other end in a measuring cell (10) that rests against the exterior of the support (5). The measuring cell is enclosed by a measuring cell housing (7). The weight of the silo (1) reversibly expands the slot (6) to a degree that is substantially proportional to the weight, thereby exerting a corresponding force on the connecting rod (9), which force is transmitted to the measuring cell (10) and measured. A cable (11) is used for power supply and signal connection.

Balance de silo comportant au moins trois montants tubulaires (5), qui est destinée à équiper ultérieurement des silos existants (1) et à déterminer l'état de remplissage de ces silos. La balance selon la présente invention repose sur le fait qu'un montant tubulaire présente un allongement élastique de son diamètre sous l'effet d'une force axiale. Chaque montant (5) possède une fente longitudinale (6) à extension parallèle à son axe et un trou (8) à extension transversale par rapport au plan de la fente longitudinale (6) à travers le diamètre du montant (5). Le trou (8) est traversé par une tige de traction (9) qui est fixée à une extrémité par un écrou (15) et qui est fixée de l'autre côté par liaison de force dans un capteur de mesure (10) reposant contre le montant (5) à l'extérieur de ce dernier. Ce capteur de mesure est entouré d'un boîtier (7). Le poids du silo (1) élargit la fente (6) de manière réversible, essentiellement en proportion du poids, cet élargissement exerçant sur la tige de traction (9) une force correspondante qui est transmise au capteur de mesure (10) et mesurée par ce dernier. Un câble (11) sert à l'alimentation électrique et à la liaison de signaux.

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