G - Physics
01
F
222/96
G01F 1/30 (2006.01) G01F 1/20 (2006.01) G01F 15/16 (2006.01)
Patent
CA 1302983
Abstract Bulk flow meter The bulk flow meter comprising a conveying space in which a baffle plate is disposed inclined in the full path of the bulk material to be measured and a measuring chamber separated from the conveying space by a partition. The impact or baffle plate is carried by a baffle plate support which is horizontally movable under the impact of the bulk material and which comprises a rod-shaped connecting member which extends through an opening in the partition. A dust protection means prevents dirt and dust from the conveying space passing through the opening of the partition into the measuring chamber and impairing the function of the sensitive components of the bulk flow meter accommodated in the measuring chamber. The dust protection means includes a rigid tube which surrounds over part of the length thereof the portion of the rod-shaped connecting member projecting through the opening in the partition and the diameter of which is greater than the diameter of the rod-shaped connect- ing member. The one end of the rigid tube is connected by a first flexible diaphragm in dust-tight manner to the partition and the other end of the rigid tube is connected by a second flexible diaphragm in dust-tight manner to the rod-shaped connecting member. The dust protection means formed in this manner provides complete separation of the measuring chamber from the conveying space, largely prevents the transfer of pressure fluctu- ations between the conveying space and the measuring chamber and permits any movement of the baffle plate support, in particular also transversely of the axis of the opening, without appreciable resistance or return forces which could falsify the measurement result. Fig. 3
507424
Endress U. Hauser Gmbh U. Co.
Fetherstonhaugh & Co.
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