Abstract: An improved impeller for a rotating consistency transmitter and a method of measuring the consistency of pulp slurry flowing in a main pipeline. The impeller includes an intercepting surface designed to minimize the creation of turbulence in pulp slurry and the frictional forces on the front edge thereof when rotated in the pulp slurry. Using the impeller, a method of measuring the consistency of the pulp slurry is provided which measures the work done by forces acting on the impeller.

Abstract: A leverage insertion assembly for inserting and removing an element from a main pipeline in which a fluid is flowing. The leverage device includes a hollow positioning pipe connected to the main pipeline with a gate valve attached to the positioning pipe. Formed on the outer surface of the section of positioning pipe on the opposite side of the gate valve from the main pipeline is a spiral cut-out. Handles attached at one end to the element located inside the positioning pipe extend through the spiral cut-out. During operation, the element is moved longitudinally inside the positioning pipe when the element is rotated by turning the handles. As the handles are turned, the cut-out limits the longitudinal movement of the element inside the positioning pipe. When the element has been moved a sufficient distance inside the positioning pipe to clear gate valve, the gate valve may be closed thereby closing the positioning pipe. The element can then be removed from the positioning pipe.

Abstract: A rotating consistency transmitter and method of measuring the viscosity, consistency, concentration or the rheological properties of a flowing multi-purpose material in a pipeline by measuring the torque acting on a rotating shaft, which at one end is driven by a motor and at the other end is attached to an impeller directly positioned inside the pipeline. The rotating shaft is made up of three concentric shafts, an outer drive shaft, a middle sensor shaft and an inner reference shaft aligned and attached together so that a single motor may be used to rotate it. The sensor shaft is connected at one end to the drive shaft and connected at the opposite end to the inner reference shaft. When material is present in the main pipeline and in contact with the impeller, rotation of the impeller is impeded, thereby producing a torque across the sensor shaft.