SU368637A1 - DEVICE FOR DETERMINING THE POSITION OF MOBILE COKE MACHINES RELATING TO THE CENTER OF THE STAY POSITION - Google Patents

Description

one

The invention relates to signaling and control devices for coke oven machines. The device can be used in other industries.

A feature of the operation of coke machines is the need to install them with sufficiently high accuracy on the axes of serviced furnaces in the range of ± 10–25 mm.

A device of the type ABSU-1M for determining the position of movable coke machines is known, which contains three contactless inductive sensors, executive relays and shunts, which close the magnetic circuit of the sensors. Two sensors are connected according to the bridge scheme, one of the diagonals of which is connected to the input of a phase-sensitive amplifier with a differential load.

The proposed device is distinguished by the fact that power amplifiers are introduced into it with executive output relays, emitter repeaters, isolating diodes and a potentiometer. The third sensor is made in the form of a resonant circuit, inductively coupled to a power source and connected to one of the power amplifiers via an emitter follower. The other two power amplifiers are connected to the output of a potentiometer connected to the output of a phase-sensitive rectifier via appropriate emitter followers and isolation diodes.

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FIG. 1 shows a diagram of the installation of the device on the coal-loading car, front and side view; in fig. 2 is a block diagram of the device; in fig. 3 is a circuit diagram of the device.

Inductive sensors / mounted on the frame (port) 2 coal-loading cars along the axis of the bins 3, and shunty 4, closing the magnetic circuit of the sensors, made in the form

the remaining sheets.

Two inductive sensors / and capacitors 5 and 6 are connected according to the bridge scheme, one of the diagonals of which is connected to the input of the phase-sensitive amplifier 7. The magnitude of the capacitances

5 and 6 is chosen such that the resonance in the circuit 5- / or in the circuit 6- / arrives as the shunt approaches the corresponding sensor. To regulate the magnitude of

the zone of accurate installation without changing the distance between the sensors / and without changing the size of the air gap between the sensors and shunt 4, parallel to the differential load of the phase-sensitive amplifier

7, potentiometer 8 is switched on, to which the emitter repeaters are connected via decoupling diodes 9. An emitter follower 10 is connected to a power amplifier //, whose load is relay 12, and

emitter follower 13 - amplifier

power 14, the load of which is relay 15. Relay contacts 12 and 15 turn on incandescent lamps 1LS and 2LS of a signal board 16, respectively, signaling (respectively) the right and left positions of the moving object relative to the axis of the stop point.

The third inductive sensor / to the power supply is connected in series with a capacitor 17 and an adjustable resistance 18. The capacitance 17 and the resistance 18 are selected so that the voltage resonance in the circuit 17-1 occurs in the absence of a shunt 4 from the third sensor 1. At the same time plot 18- / is zero.

To section 18-1 of the circuit through the disconnecting contacts of the relay 12 a 15 and through the emitter follower 19, a power amplifier 20 is connected, the load of which is the relay 21, which turns on the RLS incandescent lamp 16, signaling the precise axis alignment. In order to increase the clarity of the boundaries of the signalized approach zones and the precise installation zone along the axis, the inputs of the power amplifiers // and 14 through the closing contacts of the relay 12 and 15 are bypassed by the resistances 22 and 23. The values of the resistances 22 and 23 are chosen so that after switching on the relay 12 and 15 The windings on the coils of these relays were such that relays 12 and 15 are on the verge of tripping.

The proposed device works as follows.

When approaching shunt 4 of one of the sensors 1, the balance of the sensor bridge is disturbed. The unbalance voltage is applied to the phase-sensitive amplifier 7. Since the phase angle between the unbalance voltages and the voltage supplying the sensor bridge depends on which of the sensors / shunt, then the output of the phase-sensitive amplifier 7 has a constant voltage life, the polarity of which indicates the location of the shunt. This voltage is through a potentiometer 8, decoupling diodes 9 and an emitter follower 10 or 13 to the input of a power amplifier // or 14. Depending on the polarity of the indicated voltage, load relay 12 of power amplifier 11 or relay 15 of power amplifier 14 is activated.

Turning on, the relay 12 (or 15) with its normally open contact blocks the voltage from the third sensor to the input of its amplification circuit, and the closing contacts connects to the input of its power amplifier // (or 14) the suppressor resistance 22 (or 23) and turns on the lamp incandescence 1LS (or 2LS), signaling the right

(or left) position of the movable object with respect to the axis of the stop point.

Simultaneously with the imbalance of the bridge, the approach of the shunt to the sensors causes a voltage change in the circuit section of / - 17. This voltage through the emitter follower 19 and the power amplifier 20 is fed to the relay 21. The sensitivity of the circuit is controlled by the voltage divider

included at the input of the emitter follower 19.

The executive relay 21 due to electrical interlock can only be triggered if the executive relays 12 and 15 are off.

This only happens if shunt 4 is in the middle between the sensors. There is no imbalance in the bridge, since the shunt equally affects both

sensor and actuating relay 12 and 15 are disabled. Turning on, the relay 21, with its closing contact, switches on an incandescent lamp indicating the zone of precise installation.

The accuracy of the installation alarm and the sensitivity zone of the device can be adjusted by changing the distance between the sensors and the shunt, changing the dimensions of the shunt, changing the location of the sensors themselves and changing the setting of the potentiometer 8. If necessary, the contacts of the executive relays 12, 15 and 21 can be used, for example, to control mechanisms of movement of a moving object when

d) automatic centering of it along the axis of a given stopping point.

Subject invention

Positioning device

moving coke machines with respect to the axis of the stopping point, containing three contactless induction sensors, two of which are included in the adjacent shoulders of the bridge, the diagonals of which are connected respectively to

a power supply and an input of a phase-sensitive amplifier, executive relays and shunts, characterized in that, in order to increase the reliability of the device, power amplifiers with an executive relay, emitter repeaters, decoupling diodes and a potentiometer are introduced into it, and the third sensor is made in a form of a resonant circuit, inductively coupled to a power source and connected to one of the power amplifiers via an emitter follower; The other two power amplifiers are connected to the output of a potentiometer connected to the output of a phase-sensitive rectifier via the corresponding emitter repeaters and isolation diodes.

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