SU1004238A1 - Lift control apparatus - Google Patents

Description

(54) LIFT MANAGEMENT DEVICE

one

This invention relates to electrical engineering, in particular, to elevator control devices.

A lift control device is known, which contains call buttons for the number of floors with return electromagnets, door position sensors, contacts of which are connected in parallel with the windings of electromagnets, and an executive relay whose coil is connected to the series of other contacts of door position sensors 1.

The disadvantage of this device is that when opening any elevator door, an executive relay is triggered, signaling the control system that the elevator is in normal operation. Upon the subsequent closing of this door, the relay circuit is restored and a signal is sent to the control circuit that there is no disruption to the normal operation mode, while an unauthorized person can be found in the elevator shaft and when the elevator is started after a call or order, injuries are possible. .

It is also known a control device containing a call button, the contacts of the position sensors of the cab door and the plug connected in series to the corresponding windings of the reed switch and connected via the opening contacts of the executive relay to the inputs of the motor start block, to which also through the reset button contacts and the reed switch contacts the coil of the executive relay with a response delay, the closing of which

10 are connected in parallel to the contacts of the reed switch 2.

The disadvantage of this device is its low reliability, since both the corresponding contacts of the door position sensors must be turned on in both the safety control circuit and the chain of call buttons.

The purpose of the invention is to increase reliability by simplifying the device.

The goal is achieved by the fact that

Claims (2)

In the elevator control device, the call buttons are made with return electromagnets and are connected in parallel between the disconnecting contacts of the executive relay and the other input of the motor start unit. One of the terminals of the electromagnet winding of each call button is connected via a diode to the contact sensor of the corresponding floor. The drawing shows a circuit diagram of the device. The device contains sensors of mine doors 1 according to the number of edazh and sensor 2 cab doors, which are connected to the corresponding windings 3 reed switches and are connected to the input of the motor start unit 4. An executive relay 5 is connected to the same input through the contact 3.1 of the reed switch and the contacts 6 of the reset button. The coil of the executive relay 5 is bridged by a capacitor 7, its closing contacts 5.1 are connected parallel to the contacts 3.1 of the reed switch, one closing contacts 5.2 to the door position sensor circuit, and other closing contacts 5.3 to the control circuit of the engine start block 4. The contacts 8 call buttons are connected to another input of unit 4 and connected in series with the windings 9 of return electromagnets. The terminals of the windings 9 of the return electromagnets are connected by diodes 10 to the contacts of sensors 1 of the position of the doors of the corresponding floors. Parallel to relay 5, indicator 11 is turned on. In series with the windings of electromagnets, the relay and indicator, current-limiting resistors 12 are turned on. The device operates as follows. When the elevator is called, contact 8 of the call button is pressed, for example, on the 5th floor and a current begins to flow through electromagnet 9. However, it is kept in a closed state. When the cab reaches the call level, the lift doors of the elevator automatically open, the contacts of the elevator door position sensor 1 are closed and the coil of the electromagnet 9 is bypassed through the diode 10. At the same time, the contacts 8 of the call button open. Resistor 12 serves to limit the current through the contacts of sensor 1 at the time of its closure. Diode 10 prevents current from flowing through the circuit: winding of the reed switch 3 - winding of the electromagnet 9. When opening the elevator shaft doors, current also flows through the circuit: winding 3 of the reed switch - sensor contacts 1 and along the circuit: winding 3 of the switch of the cabin door. Antiphase inclusion of the windings 3 in the circuits of the sensors 1 and 2 leads to the fact that the total magnetic flux of the windings is zero and the reed switch does not work. When closing the elevator doors, the current through these windings 3 does not leak. The resistor and capacitor 7 in the circuit of the roller of the executive relay 5 serve to obtain a delay in operating the relay for a time longer than the delay in the response time of the contacts of the sensors of the position of the door of the shaft 1 and the door of the cabin 2 embedded in the design of the elevator. This is the normal mode of operation for the combined call and lock site. If during normal operation of the elevator to open one or more doors of the dashboard, for example - the door of the first floor, then due to the closure of the corresponding contacts of the sensor 1, the current begins to flow through the corresponding winding 3 reed switch. In this case, the resulting magnetic flux acting on the reed switch is not zero and its contacts 3.1 are closed. In this case, the relay 5 is triggered and by its contact 5.1 becomes self-powered. At the same time, contact 5.2 and 5.3 of relay 5 is opened, which leads to de-energizing the windings of the reed switch and return electromagnets and issuing a signal to the engine start control unit to turn it off. Pins 5.2 and 5.3 are kept in the open state until the reset button 6 is pressed and its contact in the relay 5 circuit is open. The advantage of this control device is that the interlock node and the node call using common sensors The position of the elevator doors increases the reliability of the device. In addition, the use of the proposed control system also improves the safety of the elevator, prevents the movement of the elevator car when unauthorized persons enter the mine, and eliminates injuries during its operation. Claims An elevator control device containing call buttons on the number of floors, contacts of cabin and shaft door position sensors connected in series with the corresponding windings of the reed switch and connected via disconnecting contacts of the executive relay to the inputs of the motor start unit to which also the reset button contacts and reed switch contacts An executive relay coil is connected with a delayed response, the closing contacts of which are connected in parallel to the reed switch contacts, characterized in that In order to increase reliability, the call buttons are made with return electromagnets and are connected between the opening contacts of the executive relay and another input of the motor start unit, one of the terminals of the electromagnet winding of each call button is connected via a diode to the door sensor contact of the corresponding floor. Sources of information taken into account in the examination 1.Shremel G. X. Hoisting machines. M., “Higher School, 1980, p. 224-227. 2. USSR author's certificate for application number 2810184 / 24-11, cl. B 66 B 5/02, 1979