阅读说明：本技术 扶梯的安全控制系统及方法 (Safety control system and method for escalator ) 是由 周霖 高亚明 周予同 于 2019-09-17 设计创作，主要内容包括：本申请涉及一种扶梯的安全控制系统及方法,包括扶梯安全回路以及主控装置,所述扶梯安全回路中依次串联的多个安全开关,所述主控装置与所述扶梯安全回路相连以检测所述扶梯安全回路的通断,所述扶梯安全控制系统中还设置有安全开关采集板,所述扶梯安全回路中针对每一安全开关均设置有开关状态采集点端口,各开关状态采集点端口通过各自独立的采集支路连接至所述安全开关采集板,所述安全开关采集板通过各采集支路获取相应的安全故障采集点信号,所述安全开关采集板还与所述主控装置通信连接以发送所述安全故障采集点信号,供所述主控装置相应控制扶梯的运行或停机。采用这样的方式能够提高处理自动扶梯故障的效率。(The application relates to a safety control system and a method of an escalator, which comprises an escalator safety loop and a main control device, a plurality of safety switches are sequentially connected in series in the escalator safety loop, the main control device is connected with the escalator safety loop to detect the on-off of the escalator safety loop, the escalator safety control system is also provided with a safety switch acquisition board, each safety switch in the escalator safety loop is provided with a switch state acquisition point port, each switch state acquisition point port is connected to the safety switch acquisition board through an independent acquisition branch, the safety switch acquisition board acquires corresponding safety fault acquisition point signals through each acquisition branch, the safety switch acquisition board is also in communication connection with the main control device to send the safety fault acquisition point signal for the main control device to correspondingly control the operation or shutdown of the escalator. In this way, the efficiency of handling escalator faults can be improved.)

1. The safety control system of the escalator comprises an escalator safety loop and a main control device, wherein a plurality of safety switches are sequentially connected in series in the escalator safety loop, and the main control device is connected with the escalator safety loop to detect the on-off of the escalator safety loop;

the safety switch acquisition board is also in communication connection with the main control device to send the safety fault acquisition point signal for the main control device to correspondingly control the operation or shutdown of the escalator.

2. The safety control system according to claim 1, wherein each safety switch in the safety loop is connected to one end of the safety switch collecting board through a switch state collecting point port and a collecting branch as a fault collecting point of the safety switch.

3. The safety control system according to claim 1, wherein a supervisory room upper computer is further arranged in the safety control system, and the safety switch acquisition board is further in communication connection with the supervisory room upper computer so as to send the safety fault acquisition point signal.

4. The safety control system according to claim 1, wherein at least one of the master control device, the safety switch acquisition board, and the upper computer of the monitoring room is provided with a corresponding display device for displaying the outputted signal.

5. The safety control system according to claim 1, wherein the main control device is provided with a display device for displaying the safety fault acquisition point signal and the on-off of the escalator safety loop;

the safety switch acquisition board is provided with a display device for displaying the safety fault acquisition point signal.

6. The safety control system according to claim 3, wherein the safety switch acquisition board is in communication connection with the master control device through a CAN communication port;

the safety switch acquisition board with the monitor host computer carries out communication connection with MODBUS RTU agreement through the RS485 communication mouth.

7. The safety control method of the escalator is characterized by comprising the steps of detecting the on-off of a safety loop and the safety fault acquisition point signals of all safety switches in the safety loop, and specifically controlling the steps as follows according to the current state of the escalator:

if the safety loop is disconnected, the escalator is stopped in any state; if the safety loop is conducted and any safety fault acquisition point signal is not abnormal, the existing state is maintained;

when the escalator is in a running state, if the safety loop is conducted and any safety fault acquisition point signal is abnormal, the escalator keeps running until the escalator is switched to a shutdown state;

when the escalator is in a shutdown state, if the safety loop is conducted and any safety fault acquisition point signal is abnormal, the escalator is prompted to maintain and maintain the shutdown state until no safety fault acquisition point signal is abnormal.

8. A safety control method for an escalator as claimed in claim 7, wherein the escalator is judged to be in an operating state,

when the safety loop is conducted and any safety fault acquisition point is abnormal in signal, the escalator keeps running until the escalator is switched to a shutdown state; or

And when the safety loop is disconnected, stopping the machine and prompting maintenance.

9. The escalator safety control method according to claim 7, wherein the escalator is judged to be in a stopped state,

when the safety loop is conducted and any safety fault acquisition point signal is abnormal, prompting maintenance and keeping a shutdown state until no any safety fault acquisition point signal is abnormal;

and when the safety loop is disconnected, prompting maintenance and keeping the shutdown state until the safety loop is conducted.

10. The escalator safety control method according to claim 7, characterized in that it is implemented based on the escalator safety control system according to any one of claims 1-6.

Technical Field

The application relates to the technical field of escalator safety, in particular to a safety control system and method of an escalator.

Background

The escalator is a special device common in the field of public transportation, has certain mechanical and electrical risks, such as breakage or excessive growth of a chain directly driving a step, clamping of foreign matters at the position where the step enters a comb plate, clamping of foreign matters at an entrance of a handrail belt, sinking of the step, overload and overheating of a motor, needs to be provided with an electrical safety switch to judge the state of each risk point in order to reduce the risk to the minimum according to relevant standards,

the safety switches are connected in series to form a loop, the tail end of the loop is connected to the escalator ready-to-run input port, any one safety switch acts, the escalator ready-to-run input port loses electricity, and the escalator cannot be started or immediately stops running. Meanwhile, for quick troubleshooting, the main board is provided with a plurality of fault monitoring point ports for acquiring the states of the safety switches through connecting wires, in the traditional technology, due to the limitation of IO ports of the main board of the escalator, a plurality of points can be used as a fault point section to be connected into the main board of the escalator for monitoring, and once the escalator reports the fault of a certain section, a maintenance worker can check the switches of the section once. Meanwhile, if only the main board fault monitoring point or the connecting line of the main board fault monitoring point connected with the safety loop is abnormal and the safety switch is not disconnected, the traditional escalator can not be started or stopped, and the fault troubleshooting mode also needs to troubleshoot the section of safety switch. The two situations result in long escalator stopping time and low failure processing efficiency.

Disclosure of Invention

In view of the above, it is necessary to provide a safety control system and method for an escalator, which can improve the efficiency of handling the failure of the escalator.

A safety control system of an escalator comprises an escalator safety loop and a main control device, wherein a plurality of safety switches are sequentially connected in series in the escalator safety loop, the main control device is connected with the escalator safety loop to detect the on-off of the escalator safety loop, a safety switch acquisition board is further arranged in the escalator safety control system, an on-off state acquisition point port is arranged in the escalator safety loop for each safety switch, each on-off state acquisition point port is connected to the safety switch acquisition board through a respective independent acquisition branch, and the safety switch acquisition board acquires a corresponding safety fault acquisition point signal through each acquisition branch;

the safety switch acquisition board is also in communication connection with the main control device to send the safety fault acquisition point signal for the main control device to correspondingly control the operation or shutdown of the escalator.

Optionally, in the safety circuit, each safety switch is connected to one end of the safety switch acquisition board through the switch state acquisition point port and the acquisition branch as a fault acquisition point of the safety switch.

Optionally, a monitoring room upper computer is further arranged in the safety control system, and the safety switch acquisition board is further in communication connection with the monitoring room upper computer to send the safety fault acquisition point signal.

Optionally, the upper computer of the monitoring room is configured with a corresponding display device for displaying the output signal.

Optionally, the main control device is configured with a display device for displaying the safety fault acquisition point signal and the on-off state of the escalator safety loop;

the safety switch acquisition board is provided with a display device for displaying the safety fault acquisition point signal.

Optionally, the safety switch acquisition board is in communication connection with the master control device through a CAN communication port;

the safety switch acquisition board with the monitor host computer carries out communication connection with MODBUS RTU agreement through the RS485 communication mouth.

The invention also provides a safety control method of the escalator, which comprises the steps of detecting the on-off of the safety loop and the safety fault acquisition point signals of all the safety switches in the safety loop, and specifically controlling the steps as follows according to the current state of the escalator:

if the safety loop is disconnected, the escalator is stopped in any state; if the safety loop is conducted and any safety fault acquisition point signal is not abnormal, the existing state is maintained;

when the escalator is in a running state, if the safety loop is conducted and any safety fault acquisition point signal is abnormal, the escalator keeps running until the escalator is switched to a shutdown state;

when the escalator is in a shutdown state, if the safety loop is conducted and any safety fault acquisition point signal is abnormal, the escalator is prompted to maintain and maintain the shutdown state until no safety fault acquisition point signal is abnormal.

Optionally, the escalator is judged to be in a running state,

when the safety loop is conducted and any safety fault acquisition point is abnormal in signal, the escalator keeps running until the escalator is switched to a shutdown state;

and when the safety loop is disconnected, stopping the machine and prompting maintenance.

Optionally, the escalator is judged to be in a stop state,

when the safety loop is conducted and any safety fault acquisition point signal is abnormal, prompting maintenance and keeping a shutdown state until no any safety fault acquisition point signal is abnormal;

and when the safety loop is disconnected, prompting maintenance and keeping the shutdown state until the safety loop is conducted.

Optionally, according to the safety control method of the escalator, the safety control system based on the escalator is implemented

The safety control system and the method for the escalator comprise an escalator safety loop and a main control device, wherein a plurality of safety switches are sequentially connected in series in the escalator safety loop, the main control device is connected with the escalator safety loop to detect the on-off of the escalator safety loop, the escalator safety control system is also provided with a safety switch acquisition board, each safety switch in the escalator safety loop is provided with a switch state acquisition point port, each switch state acquisition point port is connected to the safety switch acquisition board through an independent acquisition branch, the safety switch acquisition board acquires corresponding safety fault acquisition point signals through each acquisition branch, the safety switch acquisition board is also in communication connection with the main control device to send the safety fault acquisition point signal for the main control device to correspondingly control the operation or shutdown of the escalator. In this way, the efficiency of handling escalator faults is improved.

Drawings

Fig. 1 is a schematic view of the safety control system of an escalator in one embodiment;

FIG. 2 is a schematic circuit diagram of a safety loop in one embodiment;

FIG. 3 is a schematic circuit diagram of an embodiment of a safety switch acquisition board;

FIG. 4 is a schematic flow chart of a safety control method for an escalator in an operating state according to one embodiment;

fig. 5 is a flow chart of a safety control method for the escalator in a stop state in one embodiment.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

In an embodiment, as shown in fig. 1, a safety control system of an escalator is provided, which includes an escalator safety circuit and a main control device, wherein a plurality of safety switches are sequentially connected in series in the escalator safety circuit, the main control device is connected to the escalator safety circuit to detect on/off of the escalator safety circuit, a safety switch acquisition board is further disposed in the escalator safety control system, a switch state acquisition point port is disposed in the escalator safety circuit for each safety switch, each switch state acquisition point port is connected to the safety switch acquisition board through a respective independent acquisition branch, and the safety switch acquisition board acquires a corresponding safety fault acquisition point signal through each acquisition branch. The safety switch acquisition board is also in communication connection with the main control device to send the safety fault acquisition point signal for the main control device to correspondingly control the operation or shutdown of the escalator.

As shown in fig. 2, the escalator safety circuit is formed by connecting a plurality of safety switches in series in sequence, and the safety switches are connected end to end through cables. The input end of the escalator safety loop is connected to the switching power supply, and the output end of the escalator safety loop is connected to the escalator ready-to-run input port of the main control device. Each safety switch is distributed at each potential safety hazard point needing to be monitored of the escalator, when a certain potential safety hazard point is abnormal, the corresponding switch is switched off, and the main control device can detect that the escalator safety circuit is in a disconnected state. The switching power supply is DC 24V.

In this embodiment, the safety control system is further provided with a safety switch acquisition board, two safety switches in the escalator safety loop are connected end to end through cables and are connected to the switch state acquisition point ports, and each switch state acquisition point port is connected with the safety switch acquisition board through an independent acquisition branch. Each safety switch is connected to a fault acquisition point of the safety switch acquisition board through a switch state acquisition point port and an acquisition branch, and the safety switch acquisition board acquires a state signal of the corresponding safety switch. When any safety switch in the safety circuit is disconnected, the corresponding collection point of the safety switch can collect that the switch is in an off state. Because each safety switch has an independent acquisition branch to be connected to the safety switch acquisition board, the potential safety hazard points of the escalator corresponding to each safety switch can be monitored through the fault acquisition points arranged on the safety switch acquisition board. This is advantageous for efficient troubleshooting.

In the embodiment, the main control device controls the escalator to run or stop through an escalator contactor output circuit, and the escalator contactor output circuit is connected with a contactor.

In one embodiment, as shown in fig. 2-3, there are 48 safety switches in the safety loop, and 48 safety switches are connected end to end through cables, and the cables at the end to end connections are connected to the same switch state acquisition point port, which is connected to the corresponding fault acquisition point on the safety switch acquisition board through the acquisition branch. There are also 48 fault collection points. And the rear ends of different safety switches correspond to different fault acquisition points. When any safety switch acts, the acquisition point at the rear end of the safety switch loses power, and a corresponding fault acquisition point on the acquisition board of the safety switch cannot acquire signals. According to the scanning rule of the acquisition board, the scanning is interrupted at the point, the fault is reported, when two or more safety switches act, the fault of the safety switch which acts first is reported, and the fault of the safety switch which acts later is reported after the safety switch which acts first is repaired, and the like.

As shown in fig. 1, a monitoring room upper computer is further arranged in the safety control system, and the safety switch acquisition board is further in communication connection with the monitoring room upper computer so as to send the safety fault acquisition point signal. Therefore, the state of the escalator can be clear to monitoring personnel in the monitoring room.

In this embodiment, at least one of the master control device, the safety switch acquisition board and the upper computer of the monitoring room is provided with a corresponding display device for displaying the output signal. According to specific conditions, display devices are arranged on the main control device, the safety switch acquisition board and the monitoring room upper computer and are used for displaying corresponding signals, so that monitoring personnel can conveniently know the state of the escalator.

In one embodiment, the main control device is provided with a display device for displaying the on-off state of the safety circuit and the state of the safety switch.

In one embodiment, the safety switch acquisition board is provided with a display device for displaying the state of the safety switch.

In one embodiment, the monitoring room upper computer is provided with a display device for displaying the state of the safety switch and the state of the escalator so as to prompt a monitoring person to perform corresponding operation on the escalator.

In this embodiment, the display devices configured by the main control device, the safety switch acquisition board and the upper computer of the monitoring room include, but are not limited to, LED display forms.

As shown in fig. 3, the safety switch acquisition board is provided with a CAN communication port and an RS485 communication port. The safety switch acquisition board is in communication connection with the main control device through a CAN communication port. The safety switch acquisition board with the monitor host computer carries out communication connection with MODBUS RTU agreement through the RS485 communication mouth. The safety switch acquisition board is also provided with a power supply input port of DC24V +/DC 24V-.

As shown in fig. 3, 48 safety switches in the safety loop are connected in series end to end through cables to form the safety loop, and are connected to the ready-to-operate input port of the escalator of the main control device.

In one embodiment, there is also provided a safety control method for an escalator, the method comprising: the method comprises the steps of detecting the on-off of a safety loop and the safety fault acquisition point signals of each safety switch in the safety loop, and specifically controlling the steps as follows according to the current state of the escalator:

if the safety loop is disconnected, the escalator is stopped in any state; if the safety loop is conducted and any safety fault acquisition point signal is not abnormal, the existing state is maintained;

when the escalator is in a running state, if the safety loop is conducted and any safety fault acquisition point signal is abnormal, the escalator keeps running until the escalator is switched to a shutdown state; therefore, when the collecting branch is abnormal except for the disconnection of the safety switch or the fault collecting port of the collecting plate of the safety switch is abnormal, the normal operation of the escalator can not be influenced, and the utilization rate of the escalator is effectively improved.

When the escalator is in a shutdown state, if the safety loop is conducted and any safety fault acquisition point signal is abnormal, the escalator is prompted to maintain and maintain the shutdown state until no safety fault acquisition point signal is abnormal.

Specifically, when the escalator is judged to be in a running state, the safety loop is conducted, and any safety fault acquisition point signal is abnormal, the escalator keeps running until the escalator is switched to a shutdown state; or when the safety loop is disconnected, the machine is stopped and maintenance is prompted.

Specifically, when the escalator is judged to be in a stop state, the safety loop is conducted, and any safety fault acquisition point signal is abnormal, a maintenance state is prompted and the stop state is kept until no safety fault acquisition point signal is abnormal; or when the safety loop is disconnected, prompting maintenance and keeping the shutdown state until the safety loop is conducted.

Specifically, when the safety control method of the escalator is implemented based on the safety control system of the escalator, the method specifically includes:

as shown in fig. 4, when it is determined that the escalator is in a running state, the escalator safety circuit is turned on and any safety fault acquisition point signal is abnormal, the acquisition branch may be turned off or the fault acquisition port on the safety switch acquisition board may be abnormal because the safety circuit is turned on to indicate that no safety switch is turned off. And displaying the fault of the safety switch on a safety switch acquisition board, displaying the abnormity of the acquisition board on a main control device, and displaying the abnormity of the acquisition board on a monitoring upper computer to ensure that the escalator operates. Under the condition, the elevator is normally maintained to run because the safety loop is not abnormal until the escalator is normally stopped, and then the acquisition board is maintained until the acquisition board does not display the fault of the safety switch and then normally runs.

When the escalator is judged to be in a running state, the safety loop is disconnected. Because the safety circuit is disconnected at this moment, the safety switch acquisition board can acquire the disconnection signal of the specific safety switch, the safety switch fault is displayed on the safety switch acquisition board, the safety switch fault is displayed on the main control device, and the safety switch fault is displayed on the upper computer of the monitoring room. In this case, the safety switch is turned off, which indicates that a problem occurs at a safety hazard point of the escalator, and the escalator needs to be stopped for immediate treatment so as not to cause irreparable loss. The monitoring personnel can rapidly position abnormal potential safety hazard points according to the state of the safety switch collected on the safety switch collecting board, so that problems can be rapidly checked, and the fault processing efficiency is improved.

As shown in fig. 5, when the escalator is determined to be in a stopped state, the safety circuit is turned on, and when any safety fault acquisition point signal is abnormal, the acquisition branch may be turned off or the fault acquisition point on the safety switch acquisition board may be abnormal because the safety circuit is turned on, which means that no safety switch is turned off. And displaying the fault of the safety switch on a safety switch acquisition board, displaying the abnormity of the acquisition board on a main control device, and displaying the abnormity of the acquisition board on a monitoring upper computer. Under the condition, because the escalator is in a stop state and keeps the stop state, the monitoring personnel immediately inform the maintenance personnel to maintain the safety switch acquisition board until the safety switch acquisition board does not display the fault of the safety switch and then starts to normally operate.

When the escalator is judged to be in a stop state, the safety loop is disconnected. Because the safety circuit is disconnected at this moment, the safety switch acquisition board can acquire the disconnection signal of the specific safety switch, the safety switch fault is displayed on the safety switch acquisition board, the safety switch fault is displayed on the main control device, and the safety switch fault is displayed on the upper computer of the monitoring room. In this case, the safety switch is turned off, which indicates that a problem occurs at a safety hazard point of the escalator and needs to be immediately handled so as not to cause irreparable loss. The monitoring personnel can rapidly position abnormal potential safety hazard points according to the state of the safety switch collected on the safety switch collecting board, so that problems can be rapidly checked, and the fault processing efficiency is improved.

It should be noted that the description of the acquisition board in fig. 4 and 5 refers to the acquisition board of the safety switch.

The safety control system and method for an escalator will be further described with reference to the specific embodiments shown in fig. 2-5.