SU651193A1 - Loose material rate-of-flow meter - Google Patents

Description

(54) FLUID MATERIAL FLOW METER

The invention relates to flowmeters for bulk materials, in which the flow rate is Sud t according to the parameters of the vibrations of the tray. There are known devices for measuring the flow rate of bulk materials, the principle of which is based on monitoring the reaction of interaction of the flow of bulk material with the surface of the sensing element - tray 1. Also known are flowmeters of the bulk material containing the sensing element in the form of an inclined tray, an external vibrator and a sensor controlling vibration parameters 2. The plane of oscillation of the tray is with the normal to the plane of its bottom angle less than the angle of the external friction of the bulk material. The fluidity property of the bulk material and the inertia of its particles reduce the effect of mass interaction with the surface of the vibrating tray, which reduces the sensitivity and accuracy of measurements, narrows the operating range and increases the time constant of the device. In accordance with the amplitude of oscillations of the tray, the layer of particles actually moves directly adjacent to the surface and the perceiving effect. Deeper into the flow, with increasing distance from the tray surface, the amplitude of oscillation of the particles of the material decreases and their interaction weakens. The aim of the invention is to increase the sensitivity and accuracy of measurement, expanding the operating range and reducing the time constant of the device. The goal is achieved by increasing the reaction of interaction of the flow of bulk material with the surface of the tray by installing partitions in the tray along the flow of bulk material, the surfaces of which are perpendicular to the vibration direction of the vibrator. The drawing shows a tray with partitions and a schematic diagram of a device for measuring the flow rate of bulk materials. The device comprises a tray 1 in which the partitions 2 are rigidly fixed. Tray 1 is mounted on a vertical cantilever of a flat elastic element 3. Element 3 is fixed on opposite sides of the measuring tape4 of the sensor and the measuring pin 5 of the vibrator. Electrical winding rm b vibrator and rm

The 7 sensors are connected to the amplifier muting device 8, which is connected to a power source. The arrows indicate the direction of oscillations of tray 1, which is perpendicular to the direction of movement of the flow of bulk material 9 and the surfaces of partitions 2. The movement of the flow of bulk material 9 along tray 1 can be forced, or due to gravitational forces when it is inclined. Tray 1 with bulk material 9 .. elastic element 3, sensor, vibrator and amplifying switching device

8 form an electromechanical oscillatory system. The frequencies and amplitude of the vibrations of the tray 1 are determined by the mass of the movable structural parts 1,2,3,4 and 5, the stiffness of the elastic element 3, and the amount of bulk material 9 located on the tray.

Changing the amount of bulk material 9 on tray 1 leads to a change in the amplitude and frequency of its oscillations and, accordingly, the parameters

output signal. From the voltage and frequency of the output signal, the amount of bulk material 9 presently located on the tray is determined.

Claims (2)

The invention The flow meter of bulk materials, comprising a tray mounted on an elastic element, a vibrator acting on the tray, and a sensor controlling the parameters of the tray vibrations, so that, in order to increase sensitivity and measurement accuracy, extending the working range and decreasing the time constant; in the tray, along the flow movement, partitions are installed, whose surfaces perpendicular to the direction of vibration of the vibrator. Sources of information taken in attention 1e during examination 1. USSR Copyright Certificate kg 349584, cl. G 01 F 1/10, 1961. 2. USSR author's certificate S 117092, cl. G 01 F 1/05, 1958.