SU619804A1 - Device for automatic weighing and batch metering - Google Patents

Description

The invention relates to the field of weighing technology and can be used in weighing and dosing systems for charge materials in the metallurgical and other industries.

A device for the weight dosing of bulk and liquid materials is known, comprising a weight bin, measuring and measuring; Agnic, computational unit, bloggie memory comparison unit and control unit, in which discharging is performed by special set of doses to the weight bin and determining the value of the excess of the dialed dose in relation to the preset value with the subsequent correction for the value of the excess of the specified dose during unloading.

The disadvantage of this device is the reduction in the performance of the weighing feeders due to the sequential selection of the material and its output in a single dosing cycle.

The closest in technical essence is a device containing a weight bunker suspended on the force

ritel sensors connected to a signal amplifier, dose setting device, comparison unit, control unit, actuator, operating mode switch, and measuring unit.

The disadvantages of this device are low productivity due to the need for manual switching of operating modes when typing material (loading) and dosing (unloading), insufficient accuracy due to the fact that the instrument scales when collecting material (loading) and recognizing (unloading) have one and the same upper limit and the price of the deposit, and the error-dozirsvann.

The aim of the invention is to improve the accuracy of weighing and dosing, as well as the automation of dosing.

This goal is achieved by the fact that in the proposed device the measuring unit is made in the form of loading and metering reading devices with chords, scales and ic drives, the operating mode switch is made in the form of a two-position key connected to the drives and connected to the input of the control unit , switching contacts - to the output of the signal amplifier, and, closing contacts - to the dowater of the readout reading device. The schematic drawing shows the described device containing a weight bunker 1 with a discharge gate, a power supply 2 installed on the load sensors 3, an electronic amplifier 4 of the sensor signals, an automatic switch 5, operating modes, a measuring unit 6 with two reading devices 7 n 8, a control unit 0, dose setter 1O, comparison unit 11, actuator 12. Boot reading device 7 from measuring unit 6 contains a drive motor 13 of the reichord with a pointer, reohord 14, the pointer 15, the dial 16 t and a maximum position sensor 17

zatel.

The dosing residual device 8 of the measuring device 6 contains a drive motor 13 reichord with a pointer. reohord 14, pointer 15, iFerblag 16, 25

kinematically associated with the actuator 13.

Angle converter 18 is shown as an electric signal and sensor

19 zero position pointer.

The device works in ava modes. In the first mode, the weight bunker is loaded with material up to the upper limit of the loading control meter device 7, and in the second mode, the dosing itself is carried out, repeatedly if necessary, on the scale of the Removing device 8. In the first mode, the mode switch is set by the control unit 9 in the load mode, which is compatible with the T position, the signal of the force-measuring sensors 3 is amplified by the electronic amplifier 4 and is fed to the drive of the loading sampling device 7 of the measuring unit 6. The decree gel 15 of the device 7 monitors the mass of the loaded material, indicating it on the dial of dial 16. When the limit of the dial is reached, the control unit 9 is commanded to stop. the loading by the maximum position sensor 17 installed in the loading device 7. The loading was stopped. After this, at the command of the control unit 9, the automatic switch of operation modes switch 5 switches to the P - unloading position, and the drive 13 of the arresting device 8 is connected to the output of the amplifier 4 and power is supplied to the reoord 14 of the device

The junction of the rail 14, as well as the converter 18 associated with it. From the rail 14, a compensation voltage is applied to the input of the amplifier 4, and from the transformer

Claims (1)

the mass of the material is supplied to the comparator unit 11. When the signals from the converter 18 and the dose setting device 1O are compared from the comparison unit 11 to the actuator 12, the command to stop the feeder 2, and the pointer 15 of the metering device 8 will show on the dial 16 scale doses. From the actuator, and the drive 13 of the counting device 7 is turned off. Thanks to the fact that the signal load sensors. 3 has already been compiled: when loading the signals of a reohord 14 of the counting loading device 7, the drive 13 of the reading device 8 brings its reohord 14 and the pointer 15 to the zero position. In this case, a command is issued from the metering reading device 8 by the sensor 19 of the zero position of the indicator permitting the start of metering. This command, via the control unit 91 and the actuator 12, is supplied to the gate-feeder 2 and the material dose is unloaded from the weight bin 1. The indicator 15 of the metering reading device 8 monitors the value of the dose delivered. The actuator 13 of the metering device 8 moves the dvig18 signal proportional to the dosed bottom 12 after stopping the pygel, i.e. after the dose is given, the dose command is sent to the control unit 9. The control unit switches the automatic switch 5 to position. At the same time, the drive 13 of the dosing sampling device 8 is disconnected from the output of the amplifier .4 and power is removed from its reichord 14. To the output of the amplifier 4, the actuator 13 of the loading boot device 7 is again connected and drives the reochord slider 14 and the pointer 15 of this boot pickup device. In this case, a change in the signal from sensors 3 is compensated, and an indicator 15 on the scale of auxiliary system 7 will show the amount of material remaining in the bunker 1. Upon a command from the control unit 9, the switch 5 is automatically switched to position II, and the dosing cycle is repeated. The number and size of dsks issued can be chosen by any. The limits of the scales of the metering device 8 and the setting device 1O are selected from the conditions of the magnitude of the maximum required mass of the dose, and the scale limit of the loading sampling device 7 is selected according to the value of the limit load of the balance. Thus, by reducing the limit and the dividing price of the dial of the dial 16 of the metering device 8, the accuracy of weighing and metering of the discharged chip is improved. The mode selection is made by the automatic mode switch B for the comavds supplied from the control station 9 in accordance with the program of the device. Apparatus of the Invention A device for automatic weighing and batching, with a -1 holding weight burler suspended on load sensors connected to a signal amplifier, dose setting unit, comparator unit, control unit, communication mechanism, operating mode switch and measuring unit, different that, with a chain of increasing the accuracy of weighing and dosing, as well as automation of dosing, the measuring unit is designed as a loading and dosing reading device with a reochord E, n and with Xcalak with drives, wherein the mode switch is in the form dvuhpozntsionnogo key associated with actuators and pspklk feeding your entry blszha control, switching contacts - to Iinput amplifier. signal bodies, and closing contacts - to the dosing board of the metering device.