SU80629A1 - Device for automatic control of conveyors - Google Patents

Description

The known devices for automatic control of conveyors, based on the use of magnetic starters and relays, do not provide protection against mechanical damage to conveyors, which is especially dangerous under conditions of underground work of conveyors. In the known control circuits, all starters remain on (on-the-fly and conveyor drives continue to operate, since the operator is not notified of the increase of the accident.

In the proposed device, this disadvantage is eliminated by the fact that an automatic control device composed of a single-phase generator and a relay, the contacts of which act on the coil circuits of magnetic starters, is connected to the shaft of the tension drum of the conveyor.

FIG. 1 is a diagram of an automatic control device; in fig. 2 is a circuit diagram of the proposed device.

The automatic control device consists of two main parts: a simplest single-phase current generator with a power of several volts-amperes and a relay. When the inductor / generator, made in the form of a permanent magnet, rotates in the generator core 2, a current is induced which feeds the winding of the electromagnetic relay 3. The relay, by its contacts 4, closes the control circuit of the magnetic actuator. The relay operates at such a speed of the generator, which corresponds to the normal speed of movement of the working body of the conveyor or is sufficiently close to it. The generator inductor is driven in rotation from the tension drum of the conveyor. The automatic control device has no sliding electrical contacts and is easily made explosion-proof.

The conveyor management is performed as follows. The operator, by pressing the stroke button (Fig. 2), starts the final conveyor, from which the conveyed material is unloaded. Further sequential start-up of all other traporters producing material to the final conveyor takes place.

489

Automatically, depending on the movement of the working body of the conveyor (belt, chain).

The power supply to the motors 1, 2 and 3 of the conveyors takes place through a single trunk line through the magnetic starters L1, L2, LZ of the usual type.

The circuit of the contactor coil K1 of the actuator of the first (final) conveyor is closed with the push button or limit switch, and the circuits of the contactor coils K.2, of the short circuit of all other actuators are closed and open with PAH a1 automatic control devices. and control his work. They stop supplying the material to the conveyor if it stops, for example, due to an overload, an accident with an engine or drive, due to an interruption in the power supply of the engine with energy, in the event of slipping or tearing of the tape, chain and other reasons. Normally, all conveyors stop when the control of the first actuator is opened.

For each conveyor there is a switch, respectively, B2, OT, with the help of KOTOpOiro the automatic control device can

be disabled and the control is translated “a non-automatic.

The scheme is supplemented with signaling with C /, C2, C3 lamps, with the help of which the operator warns of a conveyor system and receives an automatic return signal that the lusk of all conveyors has been completed.

Signals controlling the work of each conveyor separately can be output to the operator’s console; in this case, additional wires must be provided on the line, from and to each automatic control device.

Subject invention

A device for automatic control of conveyors using magnetic starters and relays, characterized in that, in order to ensure the sequential start of the conveyors and their protection against accidents during mechanical and electrical damages, an automatic control device is connected to the tension drum drum shaft, made in the form of one (a phase generator and a relay, the windings of which are powered from the specified generator, and the contacts are included in the circuits of the coils of magnetic actuators.

FIG. one.

irtTn

eleven