SU966499A1 - Device for metering-out liquid and loose materials - Google Patents

Description

The invention relates to dispensing devices. It can be used in the mining, metallurgical, and chemical industries, as well as in various areas of the national economy. A device for dispensing liquid and bulk materials is known, which contains a free-flowing container, divided into two compartments, an emphasis on the container, and a frame with stop-limiter stops of the container, made in the form of electromagnets with adjustable power supply 1.

The drawback of the device is the impossibility of determining simultaneously with the dosing of the density of the material being metered.

The closest in technical essence and the achieved result to the proposed is a device for dispensing liquid and bulk materials, containing freely swinging capacity, divided into two compartments, frame stops with electromagnetic stop limiters of capacity rotation, electronic pulse counter, transducer. code analog with memory block, density meter level gauges, triggers, software

control devices, electromagnet control winding, power regulator, direct current setting device and measuring circuitry 2j.

A disadvantage of the known device is the increased tolerance of measuring the density of the dosing of southerly material due to the difference in BpeMerfrf between measuring

10 volume and weight of a portion of the material in the compartment capacity.

The purpose of the invention is to improve the accuracy and simplify the electrical measuring circuit.

15

The goal is achieved by the fact that the electromagnetic stop is equipped with a hydraulic weight sensor with a pressure gauge fixed on a fixed support, while the weight sensor rods are attached to the magnetic guide of the electromagnetic stop, the electrical outlet of the pressure gauge is connected to the base of the first transistor, and its emitter is connected to a resistor,

25 the closing contact of the first group of contacts of the first relay and through the contacting contact of the second group of contacts of the first relay with a capacitor and the base of the second transistor, emitter

30 of which is connected via a potentiometer to a densitometer, and the closing contact of the first group of contacts of the first contact is connected to an integrated unit whose output is connected to a flow meter, while the equilibrium output through the first differentiating circuit is connected to the first single vibrator, the output of which is connected to the second input The NAND and the second differentiating circuit are not cut — to the input of the second simultaneous oscillator, the inverse output of which is connected to the first input of the NAND element — direct output to the second. This one-vibrator is connected to the base of the third transistor, and its collector is connected to the coil of the first relay, the output of the NAND element is connected to the base of the fourth transistor, and its collector is connected to the coil of the second relay, which is connected to the winding the magnetic circuit of the electromagnetic stop, the second ends of the coils of the first and second relays, the collectors of the first and second transistors are connected to the bus of the source of electrical current, and the second ends of the resistor, capacitor, the closing contact of the second relay, p tentsiometra, emitters of the third and fourth transistors are connected to the neutral bus.

FIG. 1 is a schematic diagram of the device; in fig. 2 electromagnetic stop, longitudinal section.

The device for dispensing liquid and bulk materials contains a freely swinging tank divided into compartments 1 and 2, stops 3 and 4, Equalimeters 5 and b, flow meter 7, density meter 8, electromagnetic stop 9, resistor 10, capacitor 11, potentiometer 12, transistors 13-16, electro-magnetic relays 17 and 18, integrated block 19, differential circuits 20 and 21, single-circuit 22 and 23, element NE-24, current source (not shown, hydraulic weight sensor 25 with pressure gauge 26, including rods 27 and 28, attached to the magnetic core 29, pistons 30 and cylinder 31 and winding 32 magnet wire 29 connected between the chains elektricheskigda DBTO.,

The device works as follows.

When the device is put into operation, the container is in one of the extreme positions, in this case, for example, compartment 1 is filled with material, and compartment 2 is emptied. The stop 3 is located on the electromagnetic stop 9. The angle between the stops 3 and 4, fixed on the axis of rotation of the capacitance, is equal to the angle of its rotation from one extreme position to another.

When an electric current is applied to the circuit, the relay is triggered.

18, closing contacts 18.1 and providing power to the winding 32 of the magnetic circuit 29. The current in the winding 32 is designed to hold compartment 1 (or compartment 2 in the extreme position when fully filled with maximum density material. The force from the material accumulated in compartment 1 is transferred through stop 3, rod. G7, piston 30 and fluid in cylinder 31 per gauge 26. The signal from the electrical output of gauge 26 enters the base of transistor 13, opens it, and a signal proportional to the weight of the material in the compartment accumulates on resistor 10 one,

When a material in compartment 1 reaches a predetermined level, a signal appears at the output of level gauge 5. Through the differentiating circuit 20 it triggers the one-shot 22, the inverse output of which produces a signal (logical unit) 200-300 ms long, which through the differentiating circuit 21, the front edge triggers the one-shot 23. From the direct output of the one-shot 23, the signal (logical unit) goes to the base of transistor 15, opens it and gives the command to turn on the relay 17, contacts 17.1 and 17.2 close, the signal from transistor 13 goes to integrating unit 19 and with it. output to the flow meter 7. When the contacts 17.2 are closed, the capacitor 11 charges to the voltage level on the resistor 10, and the signal through the transistor 14 and potentiometer 12 goes to the density meter 8. At the moment the one-shot 23 triggers, the element 24 simultaneously receives signals: the inverse output of the one-shot 23 is a short-time signal (logical zero ;, a long signal to the second input (logical unit). At the output of the element 24, a inverted signal delayed by 50 ms appears that blocks the transistor 16. At this time, relay1 8, the contacts 18.1 times1F1 7 are disconnected from the power supply of the winding 32 of the magnetic core 29 and the stop 3 moves away from the electromagnetic stop 9. The capacitance rotates and takes the position where bay 1 is unloaded and bay 2 is filled with material. At the output of element 24 a positive signal appears which opens the transistor 16 and the relay 18 shuts off, closing the contacts 18.1. In the winding 32 of the magnet top drive 29, a current appears holding the compartment 2 in its extreme position When a signal appears from the level gauge. 6, the measurement cycle is repeated.

The application of the invention improves the accuracy of measuring the weight and density of the material being metered due to their simultaneous measurement, and also simplifies the electrical measuring circuit by eliminating complex electrical devices and electronic components from it.

Claims (2)

1. USSR author's certificate 5 No. 618641, cl. G 01 F 13/00, 1978. 2. Authors certificate of the USSR 726430, cl. G 01 F 13/00, 1980 (prototype).