SU1377600A2 - Scales for hot-metal crane - Google Patents

Abstract

This invention relates to a weight measuring technique. The purpose of the invention is to increase the accuracy of the measurement of the mass of the metal by eliminating the influence of the mass of the forging and load receiving devices. After making the compensation, the mass of the cowg 1 and the load will put the empty bucket 1 under the fill. The tare weight information is stored in memory register 14 and, having passed through the channel digital-to-analog converter 15, adder 11, amplifier 12, analog-to-digital converter 13, is displayed on indicator 16. After filling the coil with melt 1, it is lifted and weighed, a digital indicator 16 indicates the mass of the liquid melt in the ladle 1, the mass of the ladle 1 with the melt is redistributed and acts on the yoke 2 of the main lift and the hook 8 of the auxiliary lift, with which the component forces are transmitted to the force-measuring The sensors 4 and 6, the daily signal from which displays the mass of the melt in the ladle 1. 1 Il. F (L

Description

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The invention relates to weighing technology and can be used in the metallurgical industry for weighing and dosing a liquid melt.

The purpose of the invention is to improve the accuracy of measuring the mass of a metal for account of eliminating the influence of the mass of the bucket and lifting devices,

The drawing shows the proposed device.

The scales contain a casting bucket 1, a traverse 2 for the main lift, a shuha for the main load-lifting unit, an overhead crane 3, sensors for the main lift for the main lift, load-lifting unit 5 for the main lift, load sensors: 6 auxiliary lifts, auxiliary lifting unit, including the auxiliary lifting truck 7 and a load hook 8 ,. angle sensor 9 per clone of auxiliary hoist chain hoist, correction unit 10, analog adder II, amplifier

12, analog-to-digital converter

13, memory register 14, digital-to-analog-B1, th converter 15, digital indication unit 16 and control unit I7

Scales work as follows.

Before weighting the ladle with the melt of the crosspiece 2 of the main lift, the empty bucket 1 rises, while the signal from the force measuring sensors 4 of the main lift proportional to the total mass of the empty bucket 1 and the cross bar 2 of the main lift goes to the first input of the analog adder 11. Auxiliary sensors 6 lifting take load of an empty cargo hook 8 auxiliary lift. The signal is proportional to this load, through the correction unit 10 is fed to the second input of the adder P, the signal from the output of which is fed to the input of the amplifier 12, the output of which is fed to the input of the analog-digital converter 13, from the output of which is digitally fed to the input of the register memory When the command is sent from the control block 17, which can be used as a button of the type KPM8-4, the received information is stored in the register 14-ti, the output of which

enters the input of the diffraction analogue converter 15, from the output of which a signal proportional to the total weight of the empty bucket and load-carrying devices of the main and auxiliary lifts in analog form with a minus sign is fed to the third input of the analog adder 11, where the subtraction occurs. In this case, the signal at the output of the analog adder 11, which is equal to zero, passes through the amplifier 52, the analog-to-digital converter 13 and is indicated in the digital display unit 16. In this way, the bucket mass and is compensated. load devices.

After that, the empty cows 1 becomes a fill. In this case, information about the tare weight is stored in memory register 14 and, after passing through the channel, a digital-to-analog converter

15, an adder 11, an amplifier 12, an analog-to-digital converter 13, is displayed on a digital indicator

16. After filling Kovt 1 with the melt, it is lifted and weighed only by the main lift. In this case, the signal from the force sensor 4, proportional to the mass of the liquid melt with the ladle 1, is fed to the first input of the analog adder 1I. The signal is proportional to the weight of the empty hook 8 auxiliary lift, enters

to the second input of the analog adder 11, on the third input of which there is a signal proportional to the total mass of the bucket 1, the crosshead 2 and the auxiliary lift hook 8 with a negative sign that is subtracted, and the output of the analog adder 1I produces a signal proportional to the mass of the liquid melt in the chamber , and is fed to the input of amplifier 12, from the output of which is fed to the input of analog-to-digital: converter 13, from the output of which, in digital form, is fed to a digital indicator that indicates the mass of the liquid melt in cowgate 1, when the liquid melt is drained from the ladle 1 into the steelmaking unit, the ladle 1 is turned over with the help of an auxiliary lift. In this case, the mass of the bucket I with the melt is redistributed and acts on the yoke 2; main lift and hook 8 auxiliary lift, through which the component forces due to

the mass of the bucket I with the melt is transmitted to the load sensors 4 and 6, the total signal from the latter shows the mass of the melt in the cows 1.

When tilting the bucket 1, the auxiliary lift trolley 7 moves and the branch of the lispasta moves from the vertical, which changes the output signal of the measuring sensor 6, which causes an error in measuring the current mass of the liquid melt poured into the steelmaking unit.

The correction in the mass measurement is carried out using a branch angle sensor 9 and a correction unit 10, the first input of which receives a signal from the auxiliary lift load sensor 6, and the second input of the block 10 receives the signal from the angle sensor 9 branch, auxiliary to the measurement result of the force measuring sensor 6. The resulting signal from the load measuring sensor 4 and the correction unit 10 is fed to the first and second inputs of the analog adder 11, the third input of which

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From register 14 of memory, a digital signal is transmitted through digital-to-analog converter 15 proportional to the mass of the tare of the bucket. 1 and load receptors 2 and 8 with a minus sign, from the output of the analog adder, a signal proportional to the mass of the melt in the ladle, through amplifier 12 is fed to the input of an analog IQ go-to-digital converter 13, from the output of which it is fed to a digital indicator 16.

Claims (1)

Invention Formula Scales dp filling crane on the bus. St. No. 1117457, characterized in that, in order to improve the accuracy of metal mass measurement by eliminating the influence of the mass of the bucket and load receptors, they are additionally equipped with a memory register, a digital-analog converter and a control unit, with one memory register input connected to the output the analog-digital converter, the other with the output of the control unit, and the output with the input of the digital-to-analog converter, the output of which is connected to the third input of the analog adder.