SU117845A1 - Automatic electric car scales - Google Patents

Description

Automatic electric car scales for composing and weighing blast furnace charge materials, having manual control of the movement mechanism of electric car scales, in which the nomenclature and quantitative set of components is set by a soft switch with a contact device for supplying the actuator with an impulse to achieve a given weight, stopping the supply of weighed material, difficult and unreliable in operation.

In the proposed automatic electric car scales, this disadvantage is eliminated. The essence of the invention is a simpler communication scheme between a program switch and a weighing device, made in the form of a step transformer connected to the lamellas of the switch and included in the comparison circuit, which includes a linear rotary transformer with a shift transformer.

FIG. Figure 1 shows the wagon scale software control circuit; in fig. 2-diagram of the device of the weighing head.

The plugs of the / -10 bus switch intended for drawing up the work program of the weights are scored by a program of materials, or their unloading by the plug 11.

On the plug x 12 of the switch, the operation of the pockets of the scale is accumulated and the mode of filling the corresponding material on the bus 13 is set. On the tires 14 of the switch, the load mode is set. The switch provides a set of forty operations for ten materials.

At the end of the recruitment program scales are ready to work. When they move along the bins, the operation of the corresponding relays will lead to the automatic compilation of the charge in the established program order and in the specified weight quantities.

A loading and unloading relay group 15 is switched on with a step finder 16. Turning on is signaled by lamps 17. The IS group of the materials relay is connected to the plus of the control circuit. Their work con # 117845-2 -

It is monitored according to the corresponding group 19 of signal lamps. In addition, each terminal associated with the signal lamp is connected to the lamella of the annular switch 20, the brushes of which are fixed on the drum roller with the numbers of the bins on the weighing head. The ring switch is interfaced via a selsyn 21 with a sensor 22 of a tracking system that monitors the correctness of the bin number and the magnitude of its load. The degree of bunker overload is monitored by grammar indicator 23.

The electrical connection with the circuit blocks is carried out through current collectors sliding along the trolls. The Celsin 21 is connected to the drum shaft of the silo number. If the drum is in a position that does not correspond to the location of the balance in relation to the bunkers, a potential difference arises at the comparison node, leading to the operation of the relay 24 or 25 located at the output of the magnetic amplifier 26. From these relays, the engine 27 is turned on its in the right position.

When the car-scales are installed with sufficient accuracy around the bunker, the relay 28 fed through the magnetic amplifier 29 will turn on the loading control relay 30.

Magnetic amplifier 29 is driven from a reference circuit consisting of a step transformer 31 and a linearly rotating transformer 32 with a shifting transformer 33. The latter allows the linear part of the voltage curve to be used at the output of the transformer 32 when it is rotated.

FIG. Figure 2 shows a kinematic diagram of the coupling of a linear rotary transformer with a roller arrow of a weighing head.

The rotary transformer 34 is connected to the arrow roller via a gear pair 35-36. This pair trips when the material is unloaded and the transformer 5 returns to its original position. Disengagement is carried out by means of a magnet 37, which simultaneously engages the jaw 35 with the wheel 38, through which the transformer 34 is returned from the motor 39. On the roller of the arrow there is a weight register drum 40, next to which a drum 41 of the bunker is placed. The latter is rotated from the engine 42, but is simultaneously coupled with the selsyn 43, which communicates this block with the sensor system of the tracking system. On the opposite side of the selsyns, respectively, is located the ring switch 44.

The electromagnet 45 using the lever 46 records the readings of the drums on the paper tape 47.

The tape is rewound by a shaft 48 driven by a stepper motor.

Subject invention

Automatic electric carriages for building and charging materials for blast furnace blasting, having manual control of the mechanism for moving electric baton weights, in which the nomenclature and quantitative set of components is set by a software switch, which in order to simplify the process of recruiting charge components in specified quantities, a step transformer is connected to the lamellas of the program switch, the corresponding specific values of the weight of the components of the switch, and which is proportional to a given weight and determines the angle of rotation of the shaft of a linear rotary transformer connected for a period of excitement with the axis of the dial gauge, and the voltage difference between the stepwise and linear rotary transformers decreases as the pocket car weighs and when A signal is sent to the device, stopping the flow of material into the pocket and including the carriage movement mechanism.

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