Low-voltage safety circuit detection system of escalator or moving sidewalk

Abstract

The utility model belongs to the technical field of escalators or moving sidewalks, and discloses a low-voltage safety circuit detection system of an escalator or a moving sidewalk, which comprises a fault signal acquisition module, a main board processing control module, a fault display module and a direct current (DC) 24V power supply module, the mainboard processing control module receives the detection signal generated by the fault signal acquisition module, judges the state of the safety circuit according to the detection signal, and further controls the running state of the escalator; according to the utility model, a low-voltage detection mode is adopted, the problem of line voltage drop loss does not need to be considered, a transformer does not need to be independently configured for power supply, and DC 24V low-voltage power supply is safer, so that the whole escalator or moving sidewalk does not carry voltage with safety risk when people touch, the safety of the escalator is greatly improved, and the fault risk is reduced; the accuracy and reliability of fault detection are improved; the maintenance process is simplified, the maintenance efficiency is improved, and meanwhile the cost is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of escalators or moving walkways, in particular to a low-voltage safety circuit detection system for escalators or moving walkways. Background Art

[0002] With the acceleration of urbanization, escalators are increasingly used in public places such as shopping malls, subway stations, and airports. As an important passenger transportation equipment, the safety of escalators is of vital importance. Existing escalator or moving walkway safety circuits mostly use high-voltage AC110V detection methods, which have safety hazards and may lead to serious consequences once a failure occurs. At the same time, the AC110V high-voltage system needs to be equipped with a separate transformer for power supply. As the lifting height of the escalator and the use length of the moving walkway increase, the line voltage drop increases, which may cause the contactor to fail to attract, thereby increasing a lot of costs.

[0003] Therefore, it is of great significance to develop a low-voltage, low-cost, and high-safety escalator safety circuit detection system. Utility Model Content

[0004] The utility model aims to provide a low-voltage safety circuit detection system for an escalator or a moving walkway, which improves the safety of the escalator or the moving walkway and reduces the risk of failure by adopting a low-voltage detection method.

[0005] The technical solution of the utility model is:

[0006] A low voltage safety circuit detection system for an escalator or moving walkway, comprising:

[0007] The fault signal acquisition module is connected to the low-voltage safety circuit of the escalator or moving walkway, detects the on-off state of the safety circuit in real time, and generates a corresponding detection signal;

[0008] The mainboard processing control module is connected to the fault signal acquisition module, receives the detection signal generated by the fault signal acquisition module, and determines the state of the safety circuit according to the detection signal, thereby controlling the operation state of the escalator or moving walkway and generating a fault code;

[0009] A fault display module is connected to the mainboard processing control module and is used to display fault information and operating status information of the escalator or moving walkway;

[0010] The DC24V power supply module outputs 24V DC voltage to provide power for the fault signal acquisition module, mainboard processing control module, and fault display module of the safety circuit detection system.

[0011] Preferably, the fault signal acquisition module includes a plurality of electrical safety switches which are respectively installed at different positions of the escalator truss and connected to the safety circuit for detecting whether the escalator or moving walkway is in an abnormal state.

[0012] Preferably, the fault signal acquisition module further comprises a lower fault signal acquisition board;

[0013] The upper obstacle signal collection board is connected with electrical safety switches U21-U30, which are installed and fixed on the upper part of the entire escalator or moving walkway, and are respectively the left switch on the comb plate, the left switch on the handrail entrance, the right switch on the comb plate, the right switch on the handrail entrance, the left switch on the apron plate, the right switch on the apron plate, the upper switch for step sinking, the additional emergency stop switch for the moving walkway, the flywheel cover switch for the ladder lock, and the middle emergency stop switch;

[0014] The lower fault signal acquisition board is connected to the electrical safety switches D20-D29, which are installed and fixed at the bottom of the entire escalator or moving walkway, namely the left switch under the comb plate, the left switch under the handrail entrance, the right switch under the comb plate, the right switch under the handrail entrance, the left switch under the apron plate, the right switch under the apron plate, the lower switch for step sinking, the additional emergency stop switch for the moving walkway, the left switch under the step chain tensioning, and the right switch under the step chain tensioning.

[0015] Preferably, when any of the electrical safety switches U21-U30 is actuated, the detection points A01-A10 corresponding to the upper fault signal acquisition board detect that the corresponding switch is actuated abnormally and lock the fault; when any of the electrical safety switches D20-D29 is actuated, the detection points A11-A20 corresponding to the lower fault signal acquisition board detect that the corresponding switch is actuated abnormally and lock the fault.

[0016] Preferably, any of the electrical safety switches U21-U30 and D20-D29 is closed after a ground fault occurs, and the mainboard processing control module immediately locks the fault cut-off control circuit after detecting the fault signal.

[0017] Preferably, when the mainboard processing control module detects an abnormality in the safety circuit, it automatically cuts off the control power supply of the escalator or moving walkway and triggers an alarm device.

[0018] Preferably, the mainboard processing control module is connected to the control power supply through the contactor KY; when the entire safety circuit is normally connected, the detection point of the mainboard processing control module receives a low-level signal, and at the same time the safety contactor KY coil is energized, and the normally open auxiliary contact is closed and connected, so that the operation, brake, and additional brake contactor coil power supply circuits controlled by the output of the mainboard processing control module are connected, and the escalator or moving walkway operates normally.

[0019] The advantages of the utility model are:

[0020] The low-voltage safety circuit detection system of the escalator or moving walk of the utility model adopts a low-voltage detection method, and there is no need to consider the problem of line voltage drop loss, and there is no need to configure a transformer for power supply separately. It is safer to adopt a DC24V low-voltage power supply, so that the entire escalator or moving walkway does not carry a voltage that may cause safety risks to people, thereby greatly improving the safety of the escalator and reducing the risk of failure; improving the accuracy and reliability of fault detection; simplifying the maintenance process, improving the maintenance efficiency, and greatly reducing the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0022] Figure 1 The utility model is a schematic diagram of a low-voltage safety circuit detection system for an escalator or a moving walkway. DETAILED DESCRIPTION

[0023] like Figure 1 As shown, the utility model provides a low-voltage safety circuit detection system for an escalator or moving walkway, including a DC24V power supply module in a control cabinet, a fault signal acquisition module, a mainboard processing control module, a safety contactor KY, and electrical safety switches U21-U30 and D20-D29 distributed throughout the escalator or moving walkway. The fault signal acquisition module is connected to the low-voltage safety circuit of the escalator or moving walkway, detects the on-off state of the safety circuit in real time, and generates a corresponding detection signal; the mainboard processing control module is connected to the fault signal acquisition module, receives the detection signal generated by the fault signal acquisition module, and determines the state of the safety circuit according to the detection signal, thereby controlling the operating state of the escalator or moving walkway and generating a fault code; the fault display module is connected to the mainboard processing control module, and is used to display fault information and the operating state information of the escalator or moving walkway; the DC24V power supply module outputs a 24V DC voltage to power the various modules of the safety circuit detection system.

[0024] The fault signal acquisition module includes a plurality of electrical safety switches, which are respectively installed at different positions of the escalator truss and connected to the safety circuit, and are used to detect whether the escalator or moving walkway is in an abnormal state. The fault signal acquisition module also includes a lower fault signal acquisition board.

[0025] The upper obstacle signal collection board is connected with electrical safety switches U21-U30, which are installed and fixed on the upper part of the entire escalator or moving walkway, and are respectively the left switch on the comb plate, the left switch on the handrail entrance, the right switch on the comb plate, the right switch on the handrail entrance, the left switch on the apron plate, the right switch on the apron plate, the upper switch for step sinking, the additional emergency stop switch for the moving walkway, the flywheel cover switch for the ladder lock, and the middle emergency stop switch;

[0026] The lower fault signal acquisition board is connected to the electrical safety switches D20-D29, which are installed and fixed at the bottom of the entire escalator or moving walkway, namely the left switch under the comb plate, the left switch under the handrail entrance, the right switch under the comb plate, the right switch under the handrail entrance, the left switch under the apron plate, the right switch under the apron plate, the lower switch for step sinking, the additional emergency stop switch for the moving walkway, the left switch under the step chain tensioning, and the right switch under the step chain tensioning.

[0027] If any of the electrical safety switches U21-U30 is actuated, the detection points A01-A10 on the upper fault signal acquisition board will detect that the corresponding switch is anomalous and lock the fault. If any of the electrical safety switches D20-D29 is actuated, the detection points A11-A20 on the lower fault signal acquisition board will detect that the corresponding switch is anomalous and lock the fault.

[0028] When any of the electrical safety switches U21-U30 and D20-D29 is closed after a ground fault occurs, the mainboard processing control module immediately locks the fault cut-off control circuit after detecting the fault signal. When the mainboard processing control module detects an abnormality in the safety circuit, it automatically cuts off the control power supply of the escalator or moving walkway and triggers the alarm device.

[0029] The mainboard processing control module is connected to the control power supply through the contactor KY. When the entire safety circuit is normally connected, the detection point X1 of the mainboard processing control module receives a low-level signal, and at the same time the safety contactor KY coil is energized, and the normally open auxiliary contact is closed and connected, which causes the mainboard processing control module to output a control signal, so that the power supply circuits of the running, brake, and additional brake contactor coils are connected, thereby allowing the escalator or moving walkway to operate normally.

[0030] The fault display module adopts an LED display screen or a liquid crystal display screen to display fault information and the running status information of the escalator or moving walkway.

[0031] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any modifications made according to the spirit of the main technical solution of the utility model should be included in the protection scope of the utility model.

Claims

1. A low voltage safety circuit detection system for an escalator or moving walkway, characterized in that: include: The fault signal acquisition module is connected to the low-voltage safety circuit of the escalator or moving walkway, detects the on / off status of the safety circuit in real time, and generates a corresponding detection signal; The mainboard processing control module is connected to the fault signal acquisition module, receives the detection signal generated by the fault signal acquisition module, and determines the state of the safety circuit according to the detection signal, thereby controlling the operation state of the escalator or moving walkway and generating a fault code; A fault display module is connected to the mainboard processing control module and is used to display fault information and operating status information of the escalator or moving walkway; The DC24V power supply module outputs 24V DC voltage to provide power for the fault signal acquisition module, mainboard processing control module, and fault display module of the safety circuit detection system.

2. The low voltage safety circuit detection system for an escalator or moving walkway according to claim 1, characterized in that: The fault signal acquisition module includes a plurality of electrical safety switches which are respectively installed at different positions of the escalator truss and connected to the safety circuit for detecting whether the escalator or moving walkway is in an abnormal state.

3. The low voltage safety circuit detection system for an escalator or moving walkway according to claim 2, characterized in that: The fault signal acquisition module also includes a lower fault signal acquisition board; The upper obstacle signal collection board is connected with electrical safety switches U21-U30, which are installed and fixed on the upper part of the entire escalator or moving walkway, and are respectively the left switch on the comb plate, the left switch on the handrail entrance, the right switch on the comb plate, the right switch on the handrail entrance, the left switch on the apron plate, the right switch on the apron plate, the upper switch for step sinking, the additional emergency stop switch for the moving walkway, the flywheel cover switch for the ladder lock, and the middle emergency stop switch; The lower fault signal acquisition board is connected to the electrical safety switches D20-D29, which are installed and fixed at the bottom of the entire escalator or moving walkway, namely the left switch under the comb plate, the left switch under the handrail entrance, the right switch under the comb plate, the right switch under the handrail entrance, the left switch under the apron plate, the right switch under the apron plate, the lower switch for step sinking, the additional emergency stop switch for the moving walkway, the left switch under the step chain tensioning, and the right switch under the step chain tensioning.

4. The low voltage safety circuit detection system for an escalator or moving walkway according to claim 3, characterized in that: If any of the electrical safety switches U21-U30 is actuated, the detection points A01-A10 on the upper fault signal acquisition board will detect that the corresponding switch is anomalous and lock the fault. If any of the electrical safety switches D20-D29 is actuated, the detection points A11-A20 on the lower fault signal acquisition board will detect that the corresponding switch is anomalous and lock the fault.

5. The low voltage safety circuit detection system for an escalator or moving walkway according to claim 4, characterized in that: The electrical safety switches U21-U30, D20-D29 are closed after a ground fault occurs, and the mainboard processing control module immediately locks the fault cut-off control circuit after detecting the fault signal.

6. The low voltage safety circuit detection system for an escalator or moving walkway according to claim 5, characterized in that: When the mainboard processing control module detects an abnormality in the safety circuit, it automatically cuts off the control power supply of the escalator or moving walkway and triggers the alarm device.

7. The low voltage safety circuit detection system for an escalator or moving walkway according to claim 6, characterized in that: The mainboard processing control module is connected to the control power supply through the contactor KY; when the entire safety circuit is normally connected, the detection point of the mainboard processing control module receives a low-level signal, and at the same time the safety contactor KY coil is energized, and the normally open auxiliary contact is closed and connected, so that the operation, brake, and additional brake contactor coil power supply circuits of the output control of the mainboard processing control module are connected, and the escalator or moving walkway operates normally.

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