SU1509610A1 - Weigher-meter of continuous action - Google Patents

Abstract

The invention relates to a dosing technique and can be used in the metallurgical industry for dosing loose materials that are prone to hang. The aim of the invention is to improve the metering accuracy of materials prone to hang. The dosing material is fed from the hopper 1 to the weight sensor 4 of the feeder 3, the signal of which, together with the signal of the sensor 5 of the speed of the feeder 3, goes to the multiplier 6. Comparison unit 7 generates a signal of the output signal of the multiplier 6, and a signal from the setpoint adjuster 8, which 9 and the thyristor power amplifier 10 is supplied to the drive 12 of the feeder 3, providing automatic control of the performance of the latter. When the material hangs, the load on the feeder decreases, 3 which leads to a sharp drop in the current in the power supply circuit of the thyristor amplifier 10, which is picked up by the current sensor and through the differentiating chain 13 and the waiting multivibrator 14 is applied to the vibrator 2, causing it to pulse, leading to the elimination of hanging material. 1 il.

Description

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The invention relates to a dosing technique and can be used, in the metallurgical industry, the dosing of sinter components, in sinter plants, as well as in other sectors of the industry where there are dosing processes poorly bunched materials and materials that are prone to hang in the bunker.

The purpose of the invention is to improve the dosing accuracy of bulk materials prone to hang.

The drawing shows a diagram of the dispenser.

The dispenser contains a hopper 1, a vibrator 2 (booster), a feeder 3, a weight sensor 4, a speed sensor 5, a multiplier 6, a comparison unit 7, a performance setting 8, a regulator 9, a thyristor amplifier 10, a current sensor 11, a drive 12 differentiating chain 13, waiting multivibrator 14.

The dispenser works as follows.

The dosing bulk material is pulled through the slot of the hopper 1 by the belt of the feeder 3 and, as it passes through the weighing platform, it presses the weight sensor 4. The speed of the tape of the feeder 3 is measured by the speed sensor 5. A signal proportional to the weight from the weight sensor 4 and a signal proportional to the tape speed from the speed sensor 5 are sent to a multiplier 6, from where a signal proportional to the metering performance is fed to the first input of the comparator unit 7, to the second input of which a signal is sent from the setpoint device 8 performance.

The performance setting unit 8, the comparison unit 7, the controller 9, the thyristor amplifier 10 and the drive 12 together with the performance sensor (output of the multiplier 6) form a typical closed automatic control system (SAR) operating on the principle of deviation.

With a normal flow of material from the ATS bunker, it ensures the required stabilization of the metering capacity. When the dispenser capacity setting is changed, the controller 9 generates a control action applied to the thyristor amplifier 10, which in turn ensures a smooth transition to the required steady state of the dispenser.

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When the material hangs in the ATS bunker, the speed of the drive and dispenser increases to the maximum, but this does not provide a correction for the situation. To eliminate this situation, the proposed metering device further comprises a current sensor 11, differentiating the chain 13, the waiting multivibrator 14, and a booster 2, which provide prompt detection of material sticking in the hopper and turning on the vibrator 2, which eliminates the material sticking in the hopper 1.

Since, when the dosing process is established, the thyristor amplifier 10 consumes a constant (unchanging) power, i.e. the signal from current sensor 1 1 in: 1 is constant, and the output signal of the differentiating chain is equal to the bullet. When the pressure of the material column in the bunker decreases, the current consumed by the thyristor amplifier 10 decreases abruptly to the receiving platform of the weight gauge (i.e., at the beginning of the hang-up). An abrupt change in the signal from the current sensor 11 is sensed by the differentiating chain 13, which, at this output, generates a triggering pulse for the waiting multivibrator 14. By activating the waiting multivibrator, it causes a pulsed (short-term) switching on of the vibrator 2.

Claims (1)

Invention Formula A continuous weighing batcher containing a hopper on which a vibrator is installed, a feeder with weight and speed sensors connected to the multiplier inputs, and a comparator unit, one input of which is connected to the multiplier output, another input — to the setpoint adjuster, and the output A torus and a thyristor power amplifier is connected to the drive of the feeder, characterized in that, in order to improve the dosing accuracy of bulk materials prone to hang, a current sensor, a differentiating chain and a waiting multive brator, wherein a power circuit connected in series with the thyristor will strengthen the current sensor, the output of which through a differentiating and tsepo.chku zhdui1iG1 multivibrator connected to WMO / iy vibrator.