SU552514A1 - Device for continuous dosing of bulk materials - Google Patents

Description

one

The invention relates to the field of dosing of bulk materials and can be used in the industry of building materials, chemical industry, etc.

Known dispensers bulk materials with continuous control of the mass of the tray and belt types.

The closest to the technical essence of the invention is a chute dispenser, containing a bunker, a chute with an elastic suspension, a vibration exciter, an electronic control system of a pathogen.

A disadvantage of the known tape metering devices is the structural complexity, and the tray metering devices - low metering accuracy due to the lack of feedback between the flow parameters of the bulk material and the mode of operation of the vibration exciter.

In order to improve the metering accuracy in the inventive device, the material supply sensor is made in the form of a speed meter with a converter electrically connected to the vibration exciter through a comparator unit, an amplifier and an executive mechanism for regulating the amplitude of oscillation amplitudes, the comparator unit containing And-type loigical elements and the regulator is made in the form of a variable resistance electrically connected to

a change in the amplitude of the oscillation, for example, thyristor, with the possibility of changing the amplitude of the oscillations depending on the duration of the pulses produced by the transducer.

The speed meter with a transducer is made in the form of a paddle wheel, at least one and a gear disk suspended coaxially on an eternal suspension, and the gear disk is equipped with a contactless duration sensor.

The drawing shows a block diagram of the device.

The device for continuous dosing of bulk materials contains tray 1, base 2, springs 3, hopper 4, vibration exciter 5, impeller 6, math suspension 7 with a set screw 8. Mate suspension 7 ensures that the wheel 6 is constantly buried in the dosing flow 9 Together with the wheel 6 on the axis 10, a non-magnetic toothed disk 11 arises. In this case, pulses are generated in the contactless converter 12, the frequency of which is proportional to the speed of the speed of the disk 11.

The impulses on line 13 are transmitted to the comparator unit 14 and there are compared to the reference signal of the unit 15. The error signal is fed to the amplifier 16, then to the actuator 17 and to the variable resistor 18. The latter changes the operating mode of the vibration exciter 5. The control system tends to maintain constant the flow rate of the flow of solids in the tray. At a constant flow height, this achieves a constant mass flow rate.

The assumed dosing accuracy of sand and crushed stone heated to 200-300 ° C is ± 3%.

Claims (2)

1. A device for continuous dosing of bulk materials, comprising a hopper with an elastic suspension tray located under it, connected to an adjustable exciter, an electronic control circuit including a material feed sensor, a comparison unit with an amplifier, as well as an actuator with a controller characterized by that, in order to increase the accuracy, the material supply sensor is made in the form of a speed meter with a converter electrically connected with the exciter through a comparison unit, the amplifier will perform flax mechanism regulator oscillation amplitude value, wherein the comparison unit comprises logic elements such as AND and zero-phase-sensitive body, and the controller is configured as a variable resistance, an oscillation amplitude which is electrically connected to the unit, for example, a thyristor one. 2. Device but p. 1, characterized in that the speed meter with a transducer is molded in the form of at least one impeller and a gear disk suspended coaxially on a mechanical suspension, and the gear disk is equipped with a proximity sensor. eleven Gh)