RU7402U1 - LIFT OPERATION SAFETY DEVICE - Google Patents

Abstract

1. A device for ensuring the safe operation of the elevator, comprising a cabin speed converter, the output of which is connected to the input of the frequency generating unit, a reference voltage generating unit and a triggering unit, characterized in that a time interval adjuster unit, a signal voltage generating unit and a logical information processing unit, wherein the output of the frequency forming unit is connected to the first input of the time slider unit, the second input of which is connected to the output the house of the reference voltage generation unit, the third input is with the first output of the signal voltage generation unit, the second output of which is connected to the first input of the logical processing unit, the second input of which is connected to the output of the timing unit, the fourth input of the latter is connected to the first output of the logical processing unit information, the second output of which is connected to the input of the operation unit. 2. The device according to claim 1, characterized in that the signal voltage generating unit is connected to the time interval setter and logical information processing units through the galvanic isolation unit.

Description

M.KL.5 V 66 V 5/02

UcTpoucTBO for security

The utility model relates to hoisting-and-transport mine-building and can be used in particular on elevators to increase its danger and reliability of their operation.

A device is known for ensuring the safety of elevator lifts and containing a fir-tree for measuring the speed of the cabin, comparison trees and an output fir-tree (1}

This device receives external signals from sensors that control the speed of the kayoin and the frequency of the gearbox, proportional to the speed of movement of the traction ropes.

A disadvantage of the known device is the delay in determining the non-emergency stop component of the lift elevator and the complexity of the device is lower: its reliability

The most elizkin known to the proposed device is the device for ensuring the safety of the elevator containing the speed regulator of the movement of which the output is connected to the input of the frequency-forming Christmas tree for forming the voltage reference and Christmas trees (2).

In the known device, increasing the safety of the elevator should be achieved by monitoring the correspondence of the speed of the car to its set value. A disadvantage of the known device is that the moment of the emergency stop of the car is determined by the indirect measurement of the speed of the elevator, namely by counting the number of pulses generated by the optoelectrical converter and the speed of the car time and determine if the elevator speed matches the allowed speed range The above operations can only be performed in a relatively long time interval since accuracy is required in determining the speed against the background of strong interference from the elevator control system. At modern speeds, the movement of elevators of the order of k / s during the speed calculation has an emergency process of pulling the counterweight to the destroyer elevator height When creating a useful model, the problem was solved of increasing the efficiency of the elevator operation by directly isolating the admissible intervals of after elevator movement

The technical result of the implementation of the utility model is to increase the safety of the elevator operation by significantly reducing the shutdown time of the elevator in emergency situations compared to known devices, as well as a more extensive and clear differentiation of emergency situations

In accordance with the utility model, the technical result is achieved by the fact that the output of the device for ensuring the safe operation of the elevator containing the speed converter of the cabin is connected to the input of the frequency forming unit, the reference voltage generating unit and the triggering unit i, an additional unit for setting the time intervals, a signal voltage generating unit and a unit the logical processing of information in this case the output of the Frequency Forming unit is connected to the first input of the setpoint unit of time and of intervals “the second input of which is connected to the output of the reference voltage-generating unit; the third input is with the first output of the signal-voltage-generating unit; the second output of which is connected to the first input of the logical information processing uniti the second input of which is connected to the output of the time slider unit; the fourth input of the last is connected to the first output of the logical information processing unit, the second output of which is connected to the input of the operation unit; to increase the noise immunity of the device, the Formation unit signal voltages may be associated with a block of time slots and the set point information processing logic unit through a galvanic isolation

The utility model is illustrated by drawings.

The indicated examples of the device are not exhaustive and suggest the presence of other implementations, the features of which are reflected in the totality of the features of the utility model formula

Figure 1 is a structural diagram of a device

The diagram of a device with increased noise immunity is presented on

The device comprises a cab speed converter 1 which can be made in the form of an LED with a photodetector and a light flux chopper connected to the elevator car. The output of the converter 1 is connected to the input of block 2 of the frequency driver including the comparator and pulse generator. The output of block 2 is connected to the first input of block 3 of the timing unit intervals f which includes for example transistor current generators charging capacities, comparison circuits and charging keys The second input of block 3 is connected to the outputs of the unit 4 reference voltages, the third input — with the first output of the signal voltage lorning unit 5, made for example in the form of resistor voltage dividers — The second output of the Christmas tree 5 is connected to the first input of the unit in a logical data processing unit including logical integrated circuits AND OR NOT The second input of unit 6 is connected to the output unit 3 of the time interval master to the fourth input of which the first output of unit 6 is connected and the second output of the last is connected to the input of the actuation unit 7 including an electromagnetic relay with with contacts and transistor switch

When a device with increased noise immunity is implemented (it additionally includes a galvanic isolation unit 8, for example) optoelectronic pairs and pulse shapers In this version of the device, one of the outputs of the signal voltage conditioner unit 5 is connected to the input of block 8, one of the outputs of which is connected to the third input of block 3 the setter of time intervals and the other output of block 8 is connected to the first input of block 6 of the logical information processing. The device operates as follows

Block 5 of the formation of signal voltages receives from the elevator control system (not shown) a signal to one of its inputs. Depending on the purpose of the control signal, block 5 generates a signal voltage that determines in which mode the elevator is operating and received at the inputs of logical information processing block 6 and block 3 of the e-sensor of time intervals - Block 6 of the logical processing of information depending on the operating mode and if there are no violations in the power supply network of the elevator motor together with the block 4 reference voltages sets in the block 3 of the time interval controller the time interval through which the movement of the cabin should begin or continue- These times correspond to the following modes: high (nominal) speed low speed steady mode transient mode violation of power supply- Upon receipt of the corresponding signal voltage, block 3 time intervals setter under the influence of the reference voltage from the block 4 of the reference voltage starts the countdown - the countdown is interrupted upon receipt of block 3 adjuster time intervals of the motion signal from

frequency formation unit 2 “which is synchronized with pulsation from the Christmas tree exit 1 of the pre-engine speed of the cab- The run-off time starts again- If the elevator car is motionless or the speed is less than permitted then there will be no motion signals or their arrival period will be longer than the predicted time interval In this case, the output of block 3 of the time interval detector will be fouled signal Violation of the time interval i which will go to the Christmas tree b of the logical processing of information the elevator operation mode and, therefore, from the signals coming to the inputs of the logic information processing unit 6, the output of this unit will receive a shutdown signal of the elevator safety circuit to the input of the actuation unit 7; the actuation unit 7 in this case will give a prohibition signal to the control circuit of the elevator device is held in this state until of those nopi until the power is removed from it and the power is supplied again. In this case, the electronic control circuits with the help of unit 8 are decoupled galvanically from the control circuit of the LiftTM, which can dramatically increase noise immunity of the security system “command execution speed and overall reliability

Thus, the presence in the device of time delay unit t of the logical information processing unit and galvanic isolation units allows the elevator to be switched off instantly without additional delays when the cabin speed is reduced due to the landing gear catch being triggered by the buffer “unauthorized application of the winch brake t loss of the phase voltage of the network or other emergency reasons, which increases the safety of the elevator

(1) - British Patent N2027301, CL-NOZK 19/173, 1980 (2) - Patent of the Russian Federation N2000270, CL-B 66 V 5/02, 1991

Claims (2)

1. A device for ensuring the safe operation of the elevator, comprising a cabin speed converter, the output of which is connected to the input of the frequency generating unit, a reference voltage generating unit and a triggering unit, characterized in that a time interval adjuster unit, a signal voltage generating unit and a logical information processing unit, wherein the output of the frequency forming unit is connected to the first input of the time slider unit, the second input of which is connected to the output the house of the reference voltage generation unit, the third input is with the first output of the signal voltage generation unit, the second output of which is connected to the first input of the logical processing unit, the second input of which is connected to the output of the timing unit, the fourth input of the latter is connected to the first output of the logical processing unit information, the second output of which is connected to the input of the response unit.  2. The device according to claim 1, characterized in that the signal voltage generating unit is connected to the time slider and logic processing units through the galvanic isolation unit.