Escalator control method and escalator system

Abstract

The present application relates to an escalator control method and an escalator system. The rotation speed of the escalator main engine includes three working conditions according to relative high and low, namely, 0 speed, low speed or high speed; the escalator control method includes collecting the load of the escalator in real time when the escalator main engine is in a high-speed working condition, and when the escalator load changes, correspondingly increasing or decreasing the voltage of the escalator main engine so that the rotation speed of the escalator main engine approaches the rotation speed before the load change. Compared with the prior art, this solution automatically adjusts the voltage supplied to the escalator main engine according to the escalator load when the escalator is in operation while maintaining a high-speed working condition, so as to improve the use efficiency of the escalator main engine and achieve the energy-saving effect of the escalator system.

Description

Technical Field

[0001] The present application relates to the technical field of escalators, and in particular to an escalator control method and an escalator system. Background Art

[0002] Escalators (including moving walkways) are common electromechanical equipment in the field of building transportation. As a common means of transportation for transporting passengers up, down or straight, escalators are increasingly widely used in public places such as shopping malls, airports, and stations.

[0003] The escalator includes a truss, a plurality of steps mounted on the truss, an escalator main unit (such as a three-phase asynchronous motor) mounted on the truss and used to drive each step, each step is connected in series through a step chain, and the step chain pulls each step to move along a guide rail under the drive of the escalator main unit.

[0004] Existing escalators, when loaded, whether carrying one person or fully loaded, in order to run at high speed, the frequency and voltage of the elevator host remain unchanged, resulting in very low efficiency of the escalator and increased energy consumption of the escalator. Summary of the invention

[0005] Based on this, it is necessary to address the above technical issues and the present application provides an escalator control method and escalator system.

[0006] The control method of the escalator, the speed of the escalator host includes three working conditions according to the relative high and low, namely 0 speed, low speed or high speed;

[0007] The escalator control method comprises collecting the load of the escalator in real time when the escalator host is in high-speed working condition, and when the escalator load changes, increasing or decreasing the voltage of the escalator host accordingly to make the speed of the escalator host approach the speed before the load change.

[0008] Several optional methods are also provided below, but they are not intended to be additional limitations on the above-mentioned overall solution, but are merely further supplements or preferences. Under the premise that there are no technical or logical contradictions, each optional method can be combined with the above-mentioned overall solution separately, and multiple optional methods can also be combined.

[0009] Optionally, the escalator host is under high-speed working conditions:

[0010] When the escalator load changes from small to large, the voltage of the escalator host increases accordingly;

[0011] When the escalator load changes from large to small, the voltage of the escalator host is reduced accordingly.

[0012] Optionally, the escalator host is under high-speed working conditions:

[0013] The expected voltage of the escalator is obtained by performing calculation according to the voltage lower limit of the escalator and the real-time load of the escalator.

[0014] Optionally, when the escalator host is in high-speed working condition, the expected voltage of the escalator is calculated as follows:

[0015] V 实时 =V 下限 +C 实时 (V 上限 -V 下限 ) / C 满载

[0016] V 实时 The expected voltage of the escalator;

[0017] V 上限 is the upper voltage limit of the escalator;

[0018] V 下限 is the lower voltage limit of the escalator;

[0019] C 实时 is the real-time load of the escalator;

[0020] C 满载 The escalator is fully loaded.

[0021] Optionally, the escalator control method further includes further adjusting the rotation speed of the escalator main machine by means of voltage conversion and / or frequency conversion according to the current working condition of the escalator main machine when the escalator load changes, so as to switch to a corresponding working condition.

[0022] Optionally, the escalator host is in a 0-speed or low-speed working condition:

[0023] When the escalator load increases from 0 and reaches the load preset value, the escalator host is switched to high-speed working condition by frequency conversion.

[0024] Optionally, the escalator host is under high-speed working condition;

[0025] When the escalator load is 0, the escalator host maintains the current working condition for a preset time, and then switches the escalator host to a low-speed working condition by frequency conversion.

[0026] Optionally, the escalator is in a low-speed operating condition;

[0027] When the escalator load is 0, the escalator host maintains the current working condition for a preset time, and then switches the escalator host to a 0-speed working condition by frequency conversion.

[0028] Optionally, the escalator control method further includes collecting the rotation speed of the escalator host in real time during the operation of the escalator, and when the rotation speed of the escalator host decreases, adjusting the rotation speed of the escalator host by means of voltage transformation to approach the expected rotation speed of the escalator host.

[0029] This application also provides the following technical solutions:

[0030] An escalator system comprises an escalator host, a frequency converter and a control unit, wherein the control unit adjusts the escalator host through the frequency converter according to any one of the above escalator control methods.

[0031] The control method and system of the escalator of the present application automatically adjust the voltage supplied to the escalator host according to the escalator load when the escalator is in operation while maintaining a high-speed working condition, so as to improve the use efficiency of the escalator host and achieve the energy-saving effect of the escalator system. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A schematic diagram of the structure of an escalator system according to an embodiment of the present application;

[0033] Figure 2 for Figure 1 Schematic diagram of the structure of the escalator main engine;

[0034] Figure 3 for Figure 2 Schematic diagram of the structure of the middle brake disc;

[0035] Figure 4 A block diagram of an escalator system according to an embodiment of the present application;

[0036] Figure 5 A flowchart of a control method for an escalator according to an embodiment of the present application;

[0037] Figure 6 This is the voltage variation diagram of the escalator host;

[0038] Figure 7 It is the speed variation diagram of the escalator host;

[0039] Figure 8 This is the voltage variation diagram of the escalator host;

[0040] Fig. 9 This is the speed change diagram of the escalator host.

[0041] The reference numerals in the figures are described as follows:

[0042] 100, escalator system; 10, escalator; 11, escalator host; 111, main shaft; 12, brake disc; 121, detection mark; 13, protective cover; 14, inverter;

[0043] 21. control unit; 22. first detection unit; 23. second detection unit;

[0044] 30. Pillar. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0046] It should be noted that when a component is referred to as being "connected" to another component, it may be directly connected to the other component or there may be a central component. When a component is referred to as being "disposed on" another component, it may be directly disposed on the other component or there may be a central component at the same time.

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0048] like Figure 5 As shown, the present application provides a control method for an escalator, wherein the speed of the escalator main engine includes three working conditions according to relative high and low, namely, 0 speed, low speed or high speed. Among them, low speed and high speed are relative concepts, for example, high speed can be the speed when the escalator transports passengers.

[0049] The control method of the escalator includes collecting the load of the escalator in real time when the escalator host is in high-speed working condition, and when the escalator load changes, increasing or decreasing the voltage of the escalator host accordingly to make the speed of the escalator host approach the speed before the load change.

[0050] When the escalator is running, the voltage supplied to the escalator host is automatically adjusted according to the escalator load while the escalator maintains high-speed operation, so as to improve the utilization efficiency of the escalator host and achieve the effect of energy saving of the escalator system.

[0051] The escalator load is judged according to the load leaving and entering the escalator. Specifically, the load entering the escalator is an entry signal and the load leaving the escalator is an exit signal. The entry signal is detected as C 入， The departure signal detected is C 出 , let C be the escalator load (the load on the escalator at a certain moment), that is, C = C 入 -C 出 .

[0052] Wherein, the escalator load can be the weight or quantity of the load. In this embodiment, the escalator load is the quantity of the load.

[0053] The escalator control method provided in the present application is specifically described for the escalator when it is running upward.

[0054] In this embodiment, the escalator main engine is under high-speed working condition: when the escalator load changes from small to large, the voltage of the escalator main engine is increased accordingly; when the escalator load changes from large to small, the voltage of the escalator main engine is reduced accordingly.

[0055] In this embodiment, the escalator host is under high-speed working conditions: the expected voltage of the escalator is calculated according to the lower voltage limit of the escalator and the real-time load of the escalator.

[0056] In this embodiment, when the escalator host is in high-speed working condition, the expected voltage of the escalator is calculated as follows: V 实时 =V 下限 +C 实时 (V 上限 -V 下限 ) / C 满载

[0057] Among them, V 实时 is the expected voltage of the escalator; V 上限 is the upper voltage limit of the escalator; V 下限 is the lower voltage limit of the escalator; C 实时 is the real-time load of the escalator; C 满载 The escalator is fully loaded.

[0058] Specifically, assuming the escalator is fully loaded with C 满载 When C=C 满载 When the escalator is fully loaded, the voltage of the escalator host is V 上限 (e.g. 380V). However, in reality, C is usually smaller than C 满载 , so the escalator is in V most of the time 上限 Operates at the following voltages.

[0059] In order to further reduce the energy consumption of the escalator, in one embodiment, the load of the escalator is collected in real time. When the escalator load changes, the speed of the escalator host is further adjusted by voltage and / or frequency conversion according to the current speed of the escalator host to switch to the corresponding working condition.

[0060] In this embodiment, when the escalator host is in the 0-speed or low-speed working condition:

[0061] When the escalator load increases from 0 and reaches the load preset value (the load preset value is a preset load quantity or load weight, which is set according to the actual working requirements of the escalator), the escalator host is switched to high-speed working condition by frequency conversion.

[0062] When the load enters the escalator, if the escalator host is in a 0-speed or low-speed working condition, the escalator host is switched to a high-speed working condition by frequency conversion; if the escalator host is in a high-speed working condition, the escalator host maintains the current working condition.

[0063] Furthermore, the escalator host is in high-speed working condition: when the escalator load is 0, the escalator host maintains the current working condition for a preset time, and then switches the escalator host to a low-speed working condition by frequency conversion. The preset time is set according to the length of the escalator and / or the speed of the escalator host.

[0064] Also in order to further reduce the energy consumption of the escalator, referring to one of the implementation methods, the escalator is in a low-speed condition; when the escalator load is 0, the escalator host maintains the current condition for a preset time, and then switches the escalator host to a 0-speed condition by frequency conversion.

[0065] In this embodiment, the escalator control method further includes collecting the speed of the escalator host in real time during the operation of the escalator, and when the speed of the escalator host decreases, adjusting the speed of the escalator host by voltage conversion to approach the expected speed of the escalator host. When the speed of the escalator host decreases, the voltage of the escalator host increases.

[0066] When the escalator is operating normally and a load (such as a person or object) enters the escalator, the speed of the escalator host will decrease instantaneously. When the speed of the escalator decreases to a preset condition, the escalator host is adjusted in time by means of voltage conversion so that the speed of the escalator host approaches the expected speed of the escalator host, so that the escalator runs smoothly.

[0067] like Figures 6 to 9 As shown, Figure 6 This is the voltage change diagram of the escalator host when the escalator host is in high-speed working condition and the escalator load is 0; Figure 7 This is the speed change diagram of the escalator main engine when the escalator main engine is in high-speed working condition and the escalator load is 0; Figure 8 This is the voltage change diagram of the escalator host when the escalator host is in high-speed working condition and the escalator is fully loaded; Fig. 9 This is the speed change diagram of the escalator main engine when the escalator main engine is in high-speed working condition and the escalator is fully loaded.

[0068] When the escalator is in high-speed operation and the escalator load is 0, the escalator host is at the lower voltage limit (such as AC220V); when the escalator is in high-speed operation and the escalator load is fully loaded, the escalator host is at the upper voltage limit (such as AC380V); when the escalator is in high-speed operation and the escalator load is uncertain, the escalator host is between the upper and lower voltage limits, for example, between 220V-380V.

[0069] In other embodiments, when the escalator is in a low-speed condition, the escalator load and the speed of the escalator host are collected in real time, and the speed of the escalator host is adjusted by frequency conversion. Specifically, before entering the escalator, the escalator load is divided into effective load (will enter the escalator) and invalid load (will not enter the escalator). Only when the effective load enters the escalator, the speed of the escalator host will be reduced instantaneously. At this time, when the escalator speed change is collected, the speed of the escalator host is increased, and the escalator condition changes from a low-speed condition to a high-speed condition.

[0070] The control method of the above escalator is as follows: after the escalator is started, the escalator main machine runs at low frequency and low voltage (escalator runs at low speed); when a load is detected on the escalator, the escalator main machine runs at low voltage and high frequency (escalator runs at high speed); when the load of the escalator changes, the escalator main machine is adjusted by voltage adjustment (low voltage and high frequency or high voltage and high frequency); when the escalator load is 0 and the escalator main machine runs at high speed for a preset time, the running speed of the escalator main machine is reduced (escalator low speed or 0 speed).

[0071] Figure 1 , Figure 2 and Figure 4 The present invention further provides an escalator system 100, comprising an escalator host 11 and a frequency converter 14, wherein a brake disc 12 is coaxially fixed to a main shaft 111 of the escalator host 11, and a detection mark 121 is provided on the outer periphery of the brake disc 12;

[0072] The escalator system 100 also includes a control unit 21 and a first detection unit 22 connected to the control unit 21 in a circuit. The first detection unit 22 corresponds to the detection mark 121 to obtain a speed signal of the escalator host 11. The control unit 21 adjusts the speed of the escalator host 11 through the inverter 14 according to the speed signal.

[0073] The first detection unit 22 detects the speed of the escalator main machine 11 and sends the speed signal to the control unit 21. The control unit 21 processes the speed of the escalator main machine and adjusts the voltage and frequency of the inverter 14 to make the speed of the escalator main machine 11 approach the expected speed. When the first detection unit 22 detects the speed of the escalator main machine 11, the detection accuracy of the first detection unit 22 can be improved by detecting the mark 121.

[0074] In this embodiment, the control unit 21 may be a central processing unit. The first detection unit 22 is a rotation speed photoelectric sensor.

[0075] The escalator system also includes an escalator 10 for transporting passengers, the escalator 10 includes a truss, a plurality of steps mounted on the truss, an escalator host 11 (such as a three-phase asynchronous motor) mounted on the truss and used to drive each step, and a frequency converter 14 connected to the escalator host 11 circuit, and the frequency converter 14 controls the voltage and frequency of the escalator host 11. Each step is connected in series through a step chain, and the step chain pulls each step to move along the guide rail under the drive of the escalator host 11.

[0076] When a load (such as a person or an object) enters the escalator 10, the rotation speed of the escalator main engine 11 may be instantly reduced. Since the characteristics of the escalator main engine 11 are relatively rigid (the rotation speed change of the escalator main engine 11 is small), the change value of the escalator main engine 11 is very small. The setting of the detection mark 121 enables the first detection unit 22 to accurately detect the rotation speed change of the escalator main engine 11, and increase the voltage of the escalator main engine 11 through the control unit 21, so that the rotation speed of the escalator main engine 11 tends to the expected speed.

[0077] In order to further improve the accuracy of detecting the rotation speed of the escalator main machine 11, referring to one embodiment, the number of the detection marks 121 is at least two, and each detection mark 121 is arranged at intervals along the circumference of the brake disc 12. Multiple detection marks 121 can amplify the change value of the escalator main machine 11, so that the rotation speed of the escalator main machine 11 detected by the first detection unit 22 is more accurate.

[0078] In this embodiment, the number of the detection marks 121 is four. Of course, in other embodiments, the number of the detection marks 121 can be two, three, or more than four. The detection marks 121 can be determined according to actual needs, which will not be elaborated here.

[0079] The detection mark 121 extends along the circumference of the brake disc 12, and the central angle between the two ends of the detection mark 121 is 10 degrees to 30 degrees. The detection mark 121 is set in an arc, and the curvature of the detection mark 121 is the same as the curvature of the outer circle of the brake disc 12, and the center point of the detection mark 121 coincides with the center of the outer circle of the brake disc 12.

[0080] Preferably, along the circumference of the brake disc 12 , the central angle between the two ends of the detection mark 121 is 25 degrees.

[0081] Regarding the specific form of the detection mark 121, referring to one embodiment, the detection mark 121 is a groove provided on the outer periphery of the brake disc 12. Of course, in other embodiments, the detection mark 121 can also be a protrusion provided on the outer periphery of the brake disc 12.

[0082] In order to reduce the influence of the detection mark 121 on the structure of the brake disc 12 , according to one embodiment, the depth of the groove is less than 10 mm. The depth of the groove is consistent with the radial direction of the brake disc 12 .

[0083] Preferably, the depth of the groove is less than 5 mm.

[0084] The specific installation form of the first detection unit 22 and the escalator host 11 is as follows: Figure 2 The escalator main machine 11 is provided with a protective cover 13 on the outer periphery of the brake disc 12, and the protective cover 13 is installed on the escalator main machine 11;

[0085] The first detection unit 22 is mounted on the protection cover 13 and corresponds to the brake disc 12 .

[0086] In order to install the first detection unit 22 on the protective cover 13, referring to one embodiment, the protective cover 13 is provided with a mounting hole, the first detection unit 22 passes through the mounting hole, and is fixed to the protective cover 13 by a locking unit.

[0087] Specifically, the first detection unit 22 has a length direction, the side wall of the first detection unit 22 is provided with an external thread, the locking member includes at least two nuts, each nut is respectively matched with the thread of the first detection unit 22, and the protective cover 13 is held between two of the nuts.

[0088] In order to further reduce the energy consumption of the escalator 10, referring to one embodiment, the escalator system 100 further includes a second detection unit 23 connected to the control unit 21 for detecting the escalator load signal;

[0089] The control unit 21 adjusts the rotation speed of the escalator main machine 11 through the inverter 14 according to the load signal, so as to improve the use efficiency of the escalator main machine 11 and achieve the energy-saving effect of the escalator system 100.

[0090] The speed of the escalator main machine 11 includes three working conditions according to relative high and low, namely 0 speed, low speed or high speed. Among them, the low speed working condition and the high speed working condition are relative concepts, for example, the high speed working condition can be the speed when the escalator 10 transports passengers.

[0091] Specifically, after the escalator 10 is started, the escalator main engine 11 runs at low frequency and low voltage (the escalator 10 runs at a low speed). When a load is detected on the escalator 10, the escalator main engine 11 runs at low voltage and high frequency (the escalator 10 runs at a high speed). When the load of the escalator 10 changes, the escalator main engine 11 is adjusted by voltage adjustment (low voltage and high frequency or high voltage and high frequency). When the escalator load is 0 and the escalator 10 runs at a high speed for a preset time, the running speed of the escalator main engine 11 is reduced (the escalator 10 runs at a low speed or 0 speed).

[0092] The escalator load may be the weight or quantity of the load. In consideration of practical application and convenient installation, in this embodiment, the escalator load is the quantity of the load.

[0093] In this embodiment, the second detection unit 23 is a photoelectric sensor.

[0094] The second detection unit 23 is installed in the escalator 10 in accordance with one embodiment. Figure 1 , the escalator system 100 further includes two sets of column groups for installing the first detection unit 22, each column group is located at the escalator entrance and the escalator exit respectively;

[0095] Each column group includes at least two columns 30, and a passage for the load to pass through is formed between two adjacent columns 30. The second detection unit 23 includes a transmitter and a receiver, and the receiver can receive a signal sent by the transmitter. The transmitter and the receiver are installed on two adjacent columns 30 respectively.

[0096] The escalator load is determined according to the load leaving the escalator 10 and entering the escalator 10. Specifically, the load entering the escalator 10 is an entry signal and the load leaving the escalator 10 is an exit signal. The entry signal is detected as C 入 , the departure signal detected is C 出 , let C be the escalator load (the load on the escalator 10 at a certain moment), that is, C = C 入 -C 出 .

[0097] The column 30 can be fixed to the truss by welding or bolts.

[0098] In order to make the data detected by the second detection unit 23 more accurate, referring to one embodiment, along the width direction of the escalator, the distance between two adjacent columns 30 is less than 700 mm, and at this time, the passage between the two adjacent columns 30 is only suitable for one person to pass through.

[0099] Preferably, the distance between two adjacent columns 30 is less than 600 mm.

[0100] In this embodiment, the number of each column group is three. Of course, in other embodiments, the number of each column group is two or more than three. The number of columns 30 is determined according to the width of the steps, which will not be elaborated here.

[0101] Furthermore, along the running direction of the steps, the column 30 is arranged adjacent to the escalator entrance or escalator exit, and the spacing is less than 300 mm, so as to prevent people from entering and exiting the escalator 10 from the gap between the column 30 and the escalator 10, causing the second detection unit 23 to miss detection and affecting the detection data of the second detection unit 23.

[0102] When the escalator load is the weight of the load, the second detection unit 23 may be a pressure sensor installed under the pedals at the escalator entrance and the escalator exit.

[0103] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification. When the technical features in different embodiments are embodied in the same figure, it can be regarded that the figure also discloses the combination examples of the various embodiments involved.

[0104] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application.

Claims

1. A method for controlling an escalator, characterized in that: The speed of the escalator host includes three working conditions according to the relative high and low speeds, namely 0 speed, low speed or high speed; The control method of the escalator comprises collecting the load of the escalator in real time when the escalator host is in high-speed working condition, and when the escalator load changes, increasing or decreasing the voltage of the escalator host accordingly to make the speed of the escalator host approach the speed before the load change; The escalator main engine is under high-speed working condition: Calculating according to the voltage lower limit of the escalator and the real-time load of the escalator to obtain the expected voltage of the escalator; When the escalator host is in high-speed working condition, the expected voltage of the escalator is calculated as follows: In 实时 =V 下限 +C 实时 (In 上限 -V 下限 ) / C 满载 V 实时 The expected voltage of the escalator; V 上限 is the upper voltage limit of the escalator; V 下限 is the lower voltage limit of the escalator; C 实时 is the real-time load of the escalator; C 满载 The escalator is fully loaded.

2. The escalator control method according to claim 1, characterized in that: The escalator main engine is under high-speed working condition: When the escalator load changes from small to large, the voltage of the escalator host increases accordingly; When the escalator load changes from large to small, the voltage of the escalator host is reduced accordingly.

3. The escalator control method according to claim 1, characterized in that: The escalator control method further includes further adjusting the rotation speed of the escalator main machine by voltage conversion and / or frequency conversion according to the current working condition of the escalator main machine when the escalator load changes, so as to switch to the corresponding working condition.

4. The escalator control method according to claim 3, characterized in that: The escalator main engine is under the working condition of 0 speed or low speed: When the escalator load increases from 0 and reaches the load preset value, the escalator host is switched to high-speed working condition by frequency conversion.

5. The escalator control method according to claim 3, characterized in that: The escalator main machine is under high-speed working condition; When the escalator load is 0, the escalator host maintains the current working condition for a preset time, and then switches the escalator host to a low-speed working condition by frequency conversion.

6. The escalator control method according to claim 3, characterized in that: The escalator is under low speed condition; When the escalator load is 0, the escalator host maintains the current working condition for a preset time, and then switches the escalator host to the 0 speed working condition by frequency conversion.

7. The escalator control method according to claim 1, characterized in that: The escalator control method further comprises collecting the rotation speed of the escalator main engine in real time during the operation of the escalator, and when the rotation speed of the escalator main engine decreases, adjusting the rotation speed of the escalator main engine by voltage conversion to approach the expected rotation speed of the escalator main engine.

8. An escalator system, comprising an escalator host, a frequency converter and a control unit, characterized in that: The control unit adjusts the escalator host through a frequency converter according to the escalator control method according to any one of claims 1 to 7.

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