Elevator control method

Abstract

The present application aims at the problem that the brake of the elevator cannot be reliably closed due to the long-time running of the elevator in the prior art, and provides an elevator control method, which belongs to the technical field of elevators, and can automatically set the time for the elevator to maintain zero-speed running after the elevator enters the stopping program and the brake cannot be reliably closed due to the long-time running, so that the brake can be reliably closed, and the elevator can be reliably stopped after the brake is closed, thereby preventing the risk of vehicle sliding.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of elevator, and particularly relates to an elevator control method. BACKGROUND

[0002] With the development of China's economy and society, high-rise buildings are emerging, and the demand for elevators is also increasing. As an important transportation mechanical equipment, the elevator brings convenience to the user, but its safety hazards are also gradually paid attention to. For elevator equipment, reasonable design, precision machining, improvement of installation and debugging quality, and strengthening of daily maintenance should be carried out, so as to avoid safety accidents as much as possible, and make the elevator safe, reliable and comfortable for passengers. In the safety problem of the elevator, the harm of the elevator motor power torque deficiency or the brake system failure caused by the elevator sliding is particularly serious. In order to ensure the safety of the elevator, the existing elevator control system generally controls the elevator to keep zero speed running for a period of time after stopping at the floor, so as to ensure that the brake can be reliably closed during this period of time. However, with the continuous accumulation of elevator running time, the brake will inevitably be worn out. If the zero speed running time is kept unchanged, the brake will not be reliably closed, and the power torque of the elevator will be zero, which will have the risk of sliding. SUMMARY

[0003] The present application proposes an elevator control method to solve the problem that the brake cannot be reliably closed due to the wear of the brake after the long-time running of the elevator in the prior art.

[0004] The purpose of the present application is achieved by the following technical scheme: an elevator control method, after the elevator control system controls the elevator to enter the elevator stopping program, the elevator enters the stopping program:

[0005] S1, after the elevator is reduced to zero speed according to the elevator deceleration curve, the elevator control system sends a brake closing instruction;

[0006] S2, the elevator maintains zero speed running, and after a time T1, the elevator enters a running stopping transition program,

[0007] The stopping transition program is that the driving torque of the elevator traction machine starts to decrease to zero, and the speed and displacement changes of the elevator are detected synchronously, and the time of the running stopping transition program is T2;

[0008] S3, when the detected speed change and displacement change of the elevator are zero in the T2 period, the elevator stops running normally, and the stopping program of the elevator ends;

[0009] S4, when the elevator speed change and displacement change detected in the T2 time period are not zero, the elevator control system controls the elevator to maintain zero-speed operation and opens the brake of the traction machine, the T1 time becomes the maximum value T1Max set by the system, and the elevator control system issues a brake closing instruction; the traction machine driving torque becomes zero after the T1Max time, and the speed change and displacement change of the elevator are detected after the traction machine driving torque becomes zero,

[0010] When the speed change and displacement change are both zero, the elevator control system enters the optimization adjustment program of the T1 time after waiting for no one in the elevator, and obtains the optimal T1 time T1new;

[0011] When the speed change and displacement change are not zero, the brake abnormality processing program is entered;

[0012] The optimization adjustment program is that the elevator control system controls the elevator to open the brake of the traction machine, maintain zero-speed operation, and increase the T1 time to T1new, and the elevator control system issues a brake closing instruction; the traction machine driving torque becomes zero after the T1new time, and the speed change and displacement change of the elevator are detected after the traction machine driving torque becomes zero,

[0013] When the speed change and displacement change are both zero, the optimization setting is completed;

[0014] When the speed change and displacement change are not zero, the optimization adjustment step is repeated until the speed change and displacement change detected after the current T1new time are both zero, and the current T1new time is added by a certain time margin as the zero-speed operation maintenance time of the elevator in the future;

[0015] The brake abnormality processing program is that whether the elevator is configured with an elevator door lock short-circuit hardware circuit is identified, when the elevator is configured with an elevator door lock short-circuit hardware circuit, the program is executed as follows:

[0016] S51, the elevator maintains zero-speed operation, the elevator door short-circuit is opened, the elevator door is closed after confirming that there is no one in the elevator, and the external response call signal is closed, the elevator fast car runs to the highest floor, the elevator is decelerated to zero speed, and then the elevator control system stops running, the star contactor is put into operation, and a fault signal is sent to the outside world to wait for maintenance;

[0017] When the elevator is not configured with an elevator door lock short-circuit hardware circuit, the program is executed as follows:

[0018] S52, the elevator keeps the elevator door closed state and fast car runs to the highest floor, the external response call signal is closed, the elevator is decelerated to zero speed, and then the elevator control system stops running, the star contactor is put into operation, and a fault signal is sent to the outside world to wait for maintenance.

[0019] As a preferred, the T1Max is 1s-3s.

[0020] As preferred, the T1 time is optimized to be T1 plus a fixed time step.

[0021] As preferred, the fixed time step is 0.1s.

[0022] As preferred, the time margin is 0.1s-0.3s.

[0023] Compared with the prior art, the present application has the following beneficial effects:

[0024] The present application can automatically adjust the time of prolonging the elevator to maintain zero speed running after the elevator brake cannot be reliably closed due to long time running and wear, so that the brake can be reliably closed, thereby ensuring that the elevator can be reliably stopped after the brake is closed and preventing the risk of vehicle sliding. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 Flow chart for normal stopping running of the elevator of the present application;

[0026] Figure 2 Flow chart for entering running stopping transition program of the elevator;

[0027] Figure 3 Flow chart for T1 time optimization adjustment program;

[0028] Figure 4 Flow chart for brake abnormality handling program. DETAILED DESCRIPTION

[0029] The present application will be further described below in connection with the embodiments shown in the accompanying drawings:

[0030] As shown in Figure 1 , Figure 2 A kind of elevator control method, elevator control system controls elevator to enter elevator stopping program, and elevator enters stopping program:

[0031] S1, according to elevator deceleration curve, decelerate to zero speed, and elevator control system sends brake closing instruction.

[0032] S2, elevator maintains zero speed running, after time T1, elevator enters running stopping transition program,

[0033] The stopping transition program is that the driving torque of the traction machine of the elevator starts to become smaller to zero, and the speed and displacement change of the elevator are detected synchronously, and the time of the running stopping transition program is T2.

[0034] S3, when the speed change and displacement change detected in T2 time period are zero, elevator normal stop running, and elevator stopping program ends.

[0035] T1 is the time to ensure the reliable closing of the elevator brake, and as the elevator running time increases, the brake wear is inevitable, so the time of the reliable closing of the brake will be extended, and the T1 time also needs to be changed. If the T1 time remains unchanged, the elevator may slip due to the unreliable closing of the brake, but if the T1 time is set too long, the efficiency of the elevator will be reduced, so the control method of the application can optimize the T1 time, as follows:

[0036] S4, when the elevator speed change and displacement change detected in the T2 time period are not zero, the elevator control system controls the elevator to maintain zero speed operation, and opens the brake of the traction machine, the T1 time becomes the maximum value T1Max set by the system, and the elevator control system issues a brake closing instruction; the traction machine driving torque becomes zero after the T1Max time, and the speed change and displacement change of the elevator are detected after the traction machine driving torque becomes zero. When the speed change and displacement change are both zero, it means that the brake closing time is too long, so the elevator control system waits until there is no one in the elevator before entering the T1 time optimization adjustment program to obtain the best T1 time T1new.

[0037] The setting range of T1Max is 1s-3s, and the T1Max in the present application is set to 2s.

[0038] As shown in Figure 3 , the optimization adjustment program is: the elevator control system controls the elevator to open the brake of the traction machine and maintain zero speed operation, the T1+0.1s time is T1new, and the elevator control system issues a brake closing instruction; the traction machine driving torque becomes zero after the T1new time, and the speed change and displacement change of the elevator are detected after the traction machine driving torque becomes zero. When the speed change and displacement change are both zero, the automatic setting is completed.

[0039] When the speed change and displacement change are not zero, repeat the automatic adjustment steps until the speed change and displacement change detected after the current T1new time are both zero, and add a certain time margin to the current T1new as the zero speed operation maintenance time of the elevator in the future. The setting of the time margin is 0.1s-0.3s. The time margin in the present application is set to 0.1s.

[0040] As shown in Figure 4As shown, when the zero speed running time is adjusted to T1Max, the elevator speed change and displacement change after the elevator closing command are not zero, and the brake holding abnormality processing program is entered: identify whether the elevator is configured with an elevator door lock short circuit hardware circuit, when the elevator is configured with an elevator door lock short circuit hardware circuit, the program is executed as follows: S51, the elevator maintains zero speed running, the elevator door short circuit is opened, the elevator door is closed after confirming that there is no person in the elevator, and the external response call signal is closed, the elevator fast car runs to the highest floor, and the elevator control system stops running after the elevator is decelerated to zero speed, the star contactor is put into operation, and a fault signal is sent to the outside world to wait for maintenance.

[0041] When the elevator car is in an empty state, the counterweight is heavier than the car, and if the brake holding appears a problem, at this time the elevator will slide upwards, and when it is at the top floor, the upward sliding space is very short, and the car will be blocked by the building and cannot continue to slide, which can ensure the safety of the elevator.

[0042] When the elevator is not configured with an elevator door lock short circuit hardware circuit, the program is executed as follows:

[0043] S52, the elevator keeps the elevator door closed state fast car running to the highest floor, the external response call signal is closed, the elevator is decelerated to zero speed, and the elevator control system stops running, the star contactor is put into operation, and a fault signal is sent to the outside world to wait for maintenance.

[0044] The elevator without the elevator door lock short circuit hardware circuit will appear the situation that the person is trapped, when the weight ratio of the person and the car of the elevator is greater than the counterweight, the elevator car will slide downwards, and the mechanical safety part safety pawl of the elevator will work to prevent the downward sliding of the elevator. When the weight of the person and the car is less than the weight of the counterweight, the elevator car will slide upwards, and in this case, the elevator runs to the top floor to wait for the arrival of the maintenance personnel is the safest.

[0045] The specific embodiments described in the present application are only examples to illustrate the spirit of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, but will not deviate from the spirit of the present application or exceed the scope defined by the appended claims.

Claims

1. An elevator control method, characterized by, The elevator control system controls the elevator to enter a stop program The elevator enters the stop program: S1, the elevator control system sends a brake closing instruction after the elevator is decelerated to zero speed according to an elevator deceleration curve; S2, the elevator maintains zero speed operation, and after a time T1, the elevator enters a running stop transition program, The stop transition program is that the driving torque of the elevator hoisting machine starts to decrease to zero, and the speed and displacement changes of the elevator are detected synchronously, the time of the running stop transition program is T2; S3, when the detected speed and displacement changes of the elevator are zero in the T2 time period, the elevator stops running normally, and the stop program of the elevator ends; S4, when the detected speed and displacement changes of the elevator are not zero in the T2 time period, the elevator control system controls the elevator to maintain zero speed operation, and opens the brake of the hoisting machine, the T1 time becomes the maximum value T1Max set by the system, the elevator control system sends a brake closing instruction; the driving torque of the hoisting machine becomes zero after the T1Max time, and the speed and displacement changes of the elevator are detected after the driving torque of the hoisting machine becomes zero, When the speed and displacement changes are both zero, the elevator control system enters an optimized adjustment program of the T1 time after waiting for no one in the elevator, and obtains the best T1 time T1new; When the speed and displacement changes are not zero, an abnormal brake processing program is entered; The optimized adjustment program is that the elevator control system controls the elevator to open the brake of the hoisting machine and maintain zero speed operation, increases the T1 time to T1new, the elevator control system sends a brake closing instruction, and the driving torque of the hoisting machine becomes zero after the T1new time, and the speed and displacement changes of the elevator are detected after the driving torque of the hoisting machine becomes zero, When the speed and displacement changes are both zero, the optimization is completed; When the speed and displacement changes are not zero, the optimized adjustment step is repeated until the detected speed and displacement changes are both zero after the current T1new time, and a certain time allowance is added to the current T1new time as the zero speed operation maintenance time of the elevator in the future; The abnormal brake processing program is that whether the elevator is configured with an elevator door lock short circuit hardware circuit is identified, when the elevator is configured with the elevator door lock short circuit hardware circuit, the program is executed as follows: S51, the elevator maintains zero speed operation, the elevator door is short-circuited to be opened, the elevator door is closed after confirming that there is no one in the elevator, the external response call signal is closed, the elevator express runs to the highest floor, the elevator control system stops running after the elevator is decelerated to zero speed, the star contactor is put into operation, and a fault signal is sent to the outside world to wait for maintenance; When the elevator is not configured with the elevator door lock short circuit hardware circuit, the program is executed as follows: S52, the elevator keeps the elevator door closed state and runs to the highest floor at express speed, the external response call signal is closed, the elevator control system stops running after the elevator is decelerated to zero speed, the star contactor is put into operation, and a fault signal is sent to the outside world to wait for maintenance.

2. The elevator control method according to claim 1, characterized by The T1Max is 1s-3s.

3. The elevator control method according to claim 1, characterized by, The T1 time after the optimization is adjusted to T1new, which is T1 plus a fixed time step.

4. The elevator control method according to claim 3, characterized by The fixed time step is 0.1s.

5. The elevator control method according to claim 1, characterized by, The time allowance is 0.1s-0.3s.

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