SU540155A1 - Bulk material dispenser - Google Patents

Description

The dispenser contains a conveyor belt 1 with a weighing device 2 and a regulating drive 3, a weight sensor 4 with a power supply unit

5. The output of sensor 4 is connected via analog-digital converter 6 to the input of digital information conversion unit 7. The pulse output of digital information conversion unit is connected to the input of electronic key 8. The other input of electronic key is connected to output of speed sensor 9 via operating mode switch 10. The output of the key 8 is connected to one input of the comparison node. A peak of the output of the switch 8 is connected to the second input of the comparison node 11. The output of the comparison node 11 is connected via a regulating device 14 connected to the input of the terminal thyristor cascade 15.

The output in the unit code of the digital information conversion unit 7 is connected to the input of the material consumption adder 16. The control generator 17 is connected to the operation mode switch 10. The output of the frequency divider 18 is connected to the inputs of the control signal of the analog-digital converter

6, digital information conversion node 7, performance information node 12, and comparison node 11, and the output is connected to the output of speed sensor 9 via an operation mode switch 10.

The dispenser works as follows.

The dosed material fed to the conveyor belt 1 is weighed by the weighing device 2. Weight information from the weight sensor 4, which is powered by a stabilized voltage from the power supply unit 5, is fed to the analog-to-digital converter 6. After the frequency control signal of the node trigger signal is output by the frequency divider 18 to analog-to-digital converter 6, digital information converter 7, performance information node 12 and comparison node 11 analog-digital converter 6 outputs a code signal in the form of a parallel code on digital information conversion system 7. Node 7 converts information into a single code entering the adder. 16 material consumption, and in time-pulse form, opening the electronic key 8.

During the opening time of the switch 8, the frequency of the pulses from the speed sensor 9 by the performance information node 12 and the comparison node 11 is read as the number of pulses. In the comparison node 11, the information of the obtained performance is compared with the set value of the setting device 13. The resulting difference is entered into the regulating device 14, in which the integration occurs with the conversion of the result into a signal of the pulse form.

The latter is applied to the terminal thyristor cascade 15, acts on the actuator 3, choosing its optimal angular velocity.

In the flow adder 16, which receives a single code from the digital information converter 7, sequential summation of the weighed portions takes place. The verification and adjustment of the system is carried out as follows.

The operating mode switch 10 is set to the "control" position.

On the weighing device 2 set the weight, imitating the weight of the material. The control generator 17 replaces the signal from the speed sensor 9. Change the mass of the mass and the frequency of the control generator 17, check the operation of the device using the performance information node 12 and the total flow rate according to the output information of the adder 16 of the material flow rate.

Claims (3)

1. A bulk materials dispenser containing a terminal thyristor stage for controlling the angular velocity of the drive with a speed sensor, a weight sensor regulating a productivity device including a comparison unit, a setting unit, a material consumption adder and a capacity information unit, characterized in that, in order to improve metering accuracy, it provided with an analog-digital converter, a digital information conversion unit with time-pulse output and output in a unit code; electronic key and frequency divider, with the sensor output weight through an analog-to-digital converter connected to the input of the digital information conversion unit with time-pulse output, the output of which is connected to the control input of the electronic key, to another to the input of which a speed sensor is connected via a mode switch, and the output of an electronic key is connected to one input of a comparison node, the output of which is connected to an input through a regulating device terminal thyristor cascade, and the output of the terminal thyristor cascade connected to the drive; A master is connected to the second input of the comparison node, the frequency divider input is connected to the operation mode switch, and its output is connected to the control inputs of a comparison node, an analog-to-digital converter, a digital information conversion node, and a performance information node. 2. The bulk materials batcher according to claim 1, characterized in that, in order to improve the accuracy of metering, the output of the digital information conversion unit in the unit code is connected to the input of the adder material consumption. Sources of information taken into account in the examination: 1. "Automatic continuous weighing feeders" Review of foreign designs M. 1967 p. 28-30. 2. Karpin E. B. “Automation equipment for measuring and metering the mass, Publishing House M., 1971, p. 392-410. 3. Design 17, 9016, p. 5, the dispenser of the firm SHENK, Germany, published in the materials of the symposium on weighing and dosing in Moscow on June 18-20, 1974 on it