SU897292A1 - Device for automatic control of batch meter - Google Patents

Description

(54) DEVICE FOR AUTOMATIC CONTROL BATTERY

one

The invention relates to devices for controlling, controlling and controlling the operation of crushing, grinding and dispensing plants and can be used in devices for feeding poorly flowing materials, mainly in the manufacture of feed mixtures.

A device for measuring the flow rate of the bulk material by a weighing belt conveyor and the excitation current of the operating mechanism of the vibrating feeder p is known.

This device for automatic control of the metering unit is a complex weighing system with instruments and controllers and does not provide the required reliability in operation and the required uniformity of supply of light poorly flowing material in agricultural production conditions.

The closest in technical essence to the invention is

a device for automatic control of a metering device, comprising a layer height sensor with a first amplifier, a vibration chute mounted on a frame by means of elastic suspensions, and a vibration motor f 2 J.

The operation of the device is based on the change in the ohmic resistance in the flexible electrode circuit. The known device is intended

10 only for controlling the presence of a mother on the working tool and does not allow controlling the amount of material supplied.

The purpose of the invention is to improve the control accuracy.

Claims (2)

This goal is achieved by the fact that the device for automatic control of the dispenser, which contains the sensor of the height of the layer with the first amplifier, the vibration chute, installed on the frame with the help of elastic suspensions and the vibration motor, is equipped with an oscillation amplitude sensor. a second amplifier, a multiplier, a regulator, a setting device and a thyristor, the amplitude sensor through the second amplifier connected to one of the inputs of the multiplication unit, the other input of which is connected to the first amplifier, the setting controller, and one of the controller inputs, the other input which is connected to the output of the multiplication unit, and the output of the regulator is connected to the control electrode of the thyristor, which is connected to the winding circuit of the vibration vibration generator. The drawing shows the block diagram of the device. The receiving chamber 1 is mounted on a vibration chute 2 mounted with suspensions 3 on frame 4. On the frame 4, a vibromotor 5 is also mounted with excitation winding 6 fed from an AC network through the thyristor 7. The layer height sensor 8 and the oscillation sensor 9 through amplifiers 10 and 11 are connected to the multiplier 12. The output of the regulator 13, connected to the setting device 14, is connected to the control electrode of the thyristor 7. The device operates as follows. From the receiving chamber 1, the material being metered enters the vibrating motor 5 driven by the vibrating motor 5, the vibrating tray 2, which evenly feeds the material further along a technological line, for example, into a continuous feed mixer. The signal of the sensor 8 of the height of the layer of material on the tray is amplified by the amplifier 11, and the signal of the sensor 9 of the amplitude of the tray oscillations is amplified by the amplifier 10 and fed to the input of the multiplier 12. The signal obtained as a result of the multiplication is fed to the regulator 13, compared with the signal of the probe 14 and fed to the control electrode of the thyristor 7, which changes the voltage on the winding of the vibrating motor, depending on the direction of the mismatch of the given and signal, until the mismatch is eliminated. When mass from chamber 1 enters tray 2, the sensor 8 exceeds the normal value. the height of the layer delivers an increased signal about 24 proportionally to the increase, the height of the layer signal, and due to this, the regulator 13 reduces the voltage across the thyristor 7 and thus the amplitude of oscillations of the tray 2 until the product of signals from both sensors equals to a predetermined setpoint signal, and the flow rate of the dosing material to the nominal value. When the mass of material entering the tray 2 decreases, the voltage on the winding of excitation 6 and, accordingly, the amplitude of the tray oscillation increases to The value corresponding to the nominal value of the material consumption. The use of this device improves the uniformity of feed of chopped stalked feed by 12-16% improves the quality of feed mixtures and increases productivity by 9-11%. Claims An apparatus for automatically controlling a metering device comprising a layer height sensor with a first amplifier, a vibration chute mounted on a frame with elastic suspensions, and a vibromotor, o. It is distinguished by the fact that, in order to increase control accuracy, it is equipped with an oscillation amplitude sensor, a second amplifier, a block, a regulator, a setting device and a thyristor, the oscillation amplitude sensor being connected via a second amplifier to one of the multiplication inputs, the other input is connected with the first amplifier, the setpoint gauge is connected to one of the controller inputs, the other input of which is connected to the output of the multiplication unit, and the output of the controller is connected to the control to the thyristor electrode, which is connected to the air winding circuit vibromotor buzz | Sources of information taken into account during the examination 1. USSR author's certificate No. 609553, cl. B 02 C 25/00, 1976. 2.Agaykin D.I. and others. Sensors of control and regulation. M., Mechanical Engineering, 1965, p. 448-450.