RU2148007C1 - Device to provide safe operation of lift - Google Patents

Abstract

FIELD: lifting facilities; passenger lifts with automatic door control drive. SUBSTANCE: introduced additionally into device circuit are series connected making contacts of selecting pulse relays for each floor and making contacts of shaft doors for energizing shaft penetration control relay. Making contacts of shaft doors are connected in parallel by pairs on each floor. With lift cabin stopped accurately with closed making contacts of selecting pulse relays, shaft penetration control relay will be energized only when shaft door wing of any floor shaft door is opened, except for the floor where lift cabin is stopped. EFFECT: enhanced reliability of device, simplified electric circuit. 1 dwg

Description

 The invention relates to hoisting vehicles and is intended for use on mass passenger elevators with automatic door drives to prevent unauthorized persons from entering the elevator car if the elevator car enters the shaft through the shaft.

 A device for the safe operation of the elevator is known, comprising track selection sensors on each floor connected in series with the windings of the selection pulse relays, an exact stop sensor connected in series with the windings of the precise stop pulse relay, the closing contact of which is connected to the opening contact of the shaft door monitoring relay, while the input the end of the make contact of the exact stop pulse relay, the input ends of the make contacts of the track selection sensors and the exact stop sensor are connected to the source itany elevator automation circuits (see V.S. Polkovnikov et al., Installation of elevators.- M .: Higher School, 1981, p. 176).

 The disadvantage of this technical solution is that after unauthorized penetration of unauthorized persons into the elevator shaft and the subsequent closing of the shaft doors manually, the operation of the elevator circuitry is fully restored.

 The objective of the invention is to increase the reliability of the device and simplify its electrical circuit.

 This goal is achieved in that the device for safe operation of the elevator, comprising track selection sensors on each floor, connected in series with the windings of the selection pulse relays, an accurate stop sensor, connected in series with the windings of the accurate stop pulse relay, the make contact of which is connected to the opening contact of the door control relay mine, while the input end of the NO contact of the pulse relay of the exact stop, the input ends of the NC contacts of the path sensors of selection and the sensor of the exact stop The plugs are connected to the power source of the elevator automation circuits, equipped with the closing contacts of the selection pulse relays separately for each floor and the closing contacts of the door leaf shutters and the relay of control against penetration of the shaft with the closing locking contact connected to the source connected in parallel to the pairs on each floor power supply circuit of the elevator automation, and two series-connected disconnecting contacts, while the closing interlocking contact with the other end with it is single with the winding of the control relay against penetration into the mine, to which the second ends of the closing contacts of the doors of the mine doors and the second end of the opening contact of the mine door control relay are connected, and the input ends of the closing contact of the exact stop pulse relay and the opening contacts of the track selection sensors and the exact stop sensor are connected to the power source of the elevator automation circuits through series-connected disconnecting contacts of the monitoring relay from penetration into the shaft.

 The invention is illustrated by the drawing, which shows the electrical circuit of the device.

The device contains a relay 1 ₁ - 1 _p - 1 _in the selection pulse and its make contacts (1 - 2 ₁ ) - (1 - 2 _p ) - (1 - 2 _c ), where the first digit indicates the relay number, the second - its contact number , the third below is the floor number, the letter "p" is the intermediate floor, the letter "c" is the upper floor. All selection pulse relays are connected in series with track sensors 3 ₁ - 3 _in .

An independent section of the circuit is formed on each floor, in which, for example, for the 1st floor, the make contact 1 - 2 _{1 is} connected in series with two parallel free make contacts of the left leaf 4 _1-1 and the right leaf 4 _{1-2 of the} shaft doors.

 These contacts are switched on and off by mechanical action of the shutters of the shaft doors with the help of mechanical locks and locks.

The interconnected contacts 1-2 _x and 4 _{x -1.2} (where x is any floor) are connected at one end of the wiring to a power source (+81) and form a circuit to activate the relay 5 control from penetration into the mine.

 The numbering of automation circuits: 81, 361, 365, 01 is saved from the prototype circuit for the convenience of including the circuit in the general elevator circuit.

 To lock the relay 5 is its make contact 5-4, connected by one of its ends to the power source L91-13, and the other to relay 5.

 Two other NC contacts 5-5 and 5-6 of this relay, connected in series, serve to disconnect the power supply L981-1 from the general elevator circuit (+01).

 The distance between the movable and fixed parts of the make contacts 5-4 is 1.5-2 mm instead of 4 mm in the usual way.

 This is necessary so that the make contact 5-4 can turn on before disconnecting the make contacts 5-5 and 5-6. The author calls this interaction of contacts interception, which can significantly simplify the electrical circuit of the elevator and reliably disconnect the power source (+01) in one place, and not in three, as was done in the prototype.

In parallel to the autonomous sections of the circuit of contacts 1-2 _x and 4 _{x -1.2,} the closing contact 6-4 of the exact stop impulse relay and the opening contact 7-5 of the mine door control relay are connected in series, interconnected in series with relay 5.

 In addition, the device comprises an exact stop sensor 8, which is connected at one end to a power source (0.1) and the other in series to the coil of the exact stop pulse 6. The other end of relay 6 is connected to ground (-02).

 The device operates as follows.

 All the doors of the shaft are closed, the doors of the cab too, the cab is standing or moving, relay 5 is off - the elevator is in normal condition.

All selection relay 1 ₁ - ₁ are turned on and off using reed travel sensors 3 ₁ - ₃ on a magnetic basis. One 3 _x sensor is installed on each floor, and a metal shunt is mounted on the cab. When there is no cab on this floor, the sealed sensor contact is closed with a magnet.

All 3 _x sensors (except for the sensor disconnected by the shunt on the cab on one of the floors) are turned on, the shaft doors are closed, and the door contacts 4 _{x -1.2 are} open.

When the cab approaches the floor, a metal shunt enters the 3 _x sensor groove and its sealed contact opens and de-energizes the 1 _x relay, which, in turn, opens the 1-2 _x NO contact. In this position, the doors of the shaft and cab automatically open and close, not including relay 5.

 The elevator car is stopped using the exact stop sensor 8 installed on the cab, which works on the same principle as the selection sensor 3, with the only difference being that the exact stop shunts are located on each floor.

 When the groove of the sensor 8 enters the shunt, the sealed contact in the sensor 8 opens, which disconnects the relay 6 and the cab stops. When the sensor 8 leaves the shunt, relay 6 is turned on, closing the making contact 6-4, having prepared circuit 81-361-362 to turn on relay 5 in the case of unauthorized persons entering the shaft through the shaft doors.

When the cab is in the exact stop in the normal state, with the 1-2 _x closing contacts turned on, relay 5 will turn on only when any leaf of the shaft door of any floor is opened, except for the floor where the cab is located.

 Relay 5, turning on, will be further maintained in this state through its NO contact 5-4, and its NC contacts 5-5 and 5-6 will open, disconnecting the power supply L91-1 from the elevator circuitry (+01), as a result of which the elevator completely shut off. It will be possible to turn on the elevator only from the engine room, and violators will be detained in the cab until the elevator arrives.

Claims (1)

 A device for the safe operation of the elevator, comprising on each floor track selection sensors connected in series with the windings of the selection pulse relays, an exact stop sensor connected in series with the windings of the exact stop pulse relay, whose make contact is connected to the normally open contact of the mine door control relay, while the input end the closing contact of the exact stop pulse relay, the input ends of the opening contacts of the track selection sensors and the exact stop sensor are connected to the power supply drink elevator automation, characterized in that it is equipped with closing contacts of the selection pulse relays sequentially connected to each floor separately for each floor, and connecting in parallel with pairs on each floor of the shutter doors of the shaft doors and the control relay from penetrating the shaft with a closing locking contact connected to the power source of the elevator automation circuits and two series-connected disconnecting contacts, while the closing interlocking contact with the other end is connected to the coil a control relay against penetration into the mine, to which the second ends of the make contacts of the doors of the mine doors and the second end of the make contact of the mine door control relays are connected, and the input ends of the make contact of the exact stop pulse relay and the make contacts of the track selection sensors and the exact stop sensor are connected to the source power supply of the elevator automation circuits through series-connected disconnecting contacts of the control relay from penetration into the shaft.