A security door lift control method

Abstract

The application provides a safe door lifting control method, and relates to the technical field of rail transit. The method comprises the following steps: S1: judging whether the driving machine is normally working, and if yes, no operation is performed; otherwise, S2 is performed; S2: the lifting control part at the abnormal driving machine is a first control part, and the other end of the pull rope is a second control part; S3: judging whether the absolute value encoder reading of the first control part changes; if yes, S4 is performed; otherwise, no operation is performed; S4: the first control part sends the absolute value encoder reading to the controller of the second control part; and S5: the driving machine of the second control part works, so that the absolute value encoder readings on both sides are the same. The application has high feasibility. After one side of the motor fails, signal intercommunication between the two vertical columns is realized. When the pull rope is lifted artificially on the side of the failure, the motor on the other side rotates correspondingly, so that the safe door is lifted synchronously. Only one person is needed to easily perform emergency lifting control on the failure safe door.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of rail transit technology, and in particular, the present application relates to a safety door lifting control method. BACKGROUND

[0002] With the development of cities, the demand for rail vehicles that undertake transportation functions between cities and suburbs is increasing. With the diversified development trend of various regions, the actual demand for rail vehicles varies greatly. The subway (including underground railways and overground urban railways) within the city, trains (including bullet trains, high-speed trains and ordinary trains) between cities, etc. are collectively referred to as rail transit vehicles.

[0003] The platform of such rail transit vehicles has a large number of people, and the rail transit runs at a high speed, so a screen door needs to be set up at the platform to separate the platform personnel from the rail vehicle to prevent the platform personnel from accidentally falling off the platform and causing danger. For example, Chinese patent utility model patent CN206769653U provides a rail transit platform screen door, which comprises a protective wall, a screen door, a motor assembly, the motor assembly comprising a high-speed motor, a gear reduction box and a transmission rack, the gear reduction box having an input end and an output end, the transmission rack being used to be installed on the rail transit platform door, the transmission gear being engaged with the transmission rack; a battery box assembly, the battery box assembly comprising a protective track and an energy battery, the protective track having an open end and a closed end at both ends, the closed end being provided with a first metal contact piece, the first metal contact piece being electrically connected with the high-speed motor, and the energy battery being provided with a second metal contact piece. The above-mentioned utility model is provided with a motor assembly and a battery box assembly, which can form a self-contained power screen door opening system. When the screen door fails to open, only the energy battery needs to be pushed to quickly open the screen door by the high-speed motor. The above-mentioned utility model is simple to use, the system runs reliably, and the screen door can be quickly opened.

[0004] However, the driving motor of such a safety screen door has a large power, and since the platform is long and there are many screen doors, many driving motors need to be powered, which requires a large power supply capacity to power them. Once the motor is damaged, it is difficult for manpower to push the safety door to open, and high-voltage wires need to be used for power supply. Since the time of train entering the station is uncertain, the power supply of the motor must be maintained, resulting in a large power supply loss.

[0005] Now emerging a way of using pull rope as platform safety door, through multiple pull ropes to protect the edge of the platform, can reduce the whole door body quality, the whole door body power loss is reduced, but still has the following shortcomings: once the safety door motor fails, it is still very difficult to lift the pull rope door manually, and since the pull rope is horizontally arranged, lifting one end of the pull rope will make the pull rope tilt and tighten, so that it cannot continue to lift, and only the other end of the pull rope can be lifted, and the lifting height is small each time, so that the safety door is completely lifted, at least two people are needed to lift the pull rope at both ends, or one person walks back and forth between the two ends of the pull rope to control the lifting of the safety door, which is very troublesome.

[0006] Therefore, in order to solve the above problems, it is necessary for us to design a reasonable and efficient safety door lifting control method. SUMMARY

[0007] The purpose of the present application is to provide a high feasibility, after the failure of one side motor, through the signal intercommunication between the two columns, when the pull rope is lifted artificially on the failure side, the motor on the other side rotates correspondingly, so that the safety door is lifted synchronously, only one person is needed to easily control the emergency lifting of the failure safety door, and the control efficiency is high.

[0008] In order to achieve the above purpose, the technical scheme adopted by the present application is as follows:

[0009] A safety door lifting control method, applicable to a safety door structure, the structure comprising a column and a pull rope arranged between two adjacent columns, the column being provided with a sliding block for connecting with the end of the pull rope, the top end of the column being provided with a driving machine for driving the sliding block to lift, the driving machine being connected with a lifting control part, the lifting control part comprising a controller, a signal intercommunication device and an absolute value encoder connected with the rotating shaft of the driving machine;

[0010] The method comprises the following steps:

[0011] S1: judging whether the driving machine is working normally, if yes, no operation is performed, otherwise, step S2 is executed;

[0012] S2: marking the lifting control part at the abnormal driving machine as a first control part, and marking the lifting control part at the driving machine at the other end of the pull rope as a second control part; the controller of the first control part acquires the reading of the absolute value encoder in real time;

[0013] S3: judging whether the reading of the absolute value encoder of the first control part changes, if yes, step S4 is executed, otherwise, no operation is performed;

[0014] S4: the controller of the first control unit sends the absolute value encoder reading of the first control unit to the controller of the second control unit in real time through the signal intercommunicator;

[0015] S5: the controller of the second control unit drives the drive machine to work, so that the absolute value encoder reading of the second control unit is the same as that of the first control unit.

[0016] As a preferred embodiment of the present application, when step S1 is performed, the criterion for judging that the drive machine does not work normally is that the drive machine does not respond after a preset time elapses after the drive signal is sent to the drive machine.

[0017] As a preferred embodiment of the present application, when step S1 is performed, when the drive machine does not work normally, an alarm is given and step S2 is performed;

[0018] The alarm mode includes a sound alarm and a flashing light alarm.

[0019] As a preferred embodiment of the present application, when step S2 is performed, the controllers of the first control unit and the second control unit and the signal intercommunicator are turned on, and then the controller of the first control unit acquires the absolute value encoder reading in real time.

[0020] As a preferred embodiment of the present application, when step S3 is performed, it is judged whether the absolute value encoder reading of the first control unit changes and the change value is greater than a predetermined threshold value, and if so, step S4 is performed.

[0021] As a preferred embodiment of the present application, when step S4 is performed, it is specifically:

[0022] S41: an intercommunication connection between the signal intercommunicator of the first control unit and the signal intercommunicator of the second control unit is established;

[0023] S42: every time interval, the controller of the first control unit sends the absolute value encoder reading of the first control unit to the signal intercommunicator of the second control unit through the signal intercommunicator;

[0024] S43: the controller of the second control unit reads the absolute value encoder reading of the first control unit received by the signal intercommunicator of the second control unit.

[0025] As a preferred embodiment of the present application, when step S5 is performed, it is specifically:

[0026] S51: the controller of the second control unit judges whether the absolute value encoder reading of the first control unit is greater than that of the second control unit, and if so, step S52 is performed; otherwise, step S53 is performed;

[0027] S52: the controller of the second control unit drives the drive machine to work in a forward direction, so that the absolute value encoder reading of the second control unit is the same as that of the first control unit.

[0028] S53: The controller of the second control unit drives the drive machine to reverse rotation, so that the absolute value encoder reading of the second control unit is the same as that of the first control unit.

[0029] As a preferred embodiment of the present application, a balance block and a lifting column for connecting with the pull rope are arranged on the column; the sliding block is arranged on the lifting column; the drive chain is connected with the drive machine, one end of the drive chain is connected with the lifting column, and the other end of the drive chain away from the lifting column is connected with the balance block; the rotating roller is arranged on the lifting column, the transmission belt is arranged on the rotating roller, one end of the transmission belt is connected with the sliding block, and the other end of the transmission belt away from the sliding block is connected with the column; the drive sprocket is arranged on the rotating shaft of the drive machine, and the drive chain is meshed and connected with the drive sprocket.

[0030] The balance block balances the gravity of the pull rope, so that the pull rope on the failure side is lifted more easily, and one person can easily lift the pull rope.

[0031] As a preferred embodiment of the present application, an insulating shielding layer is arranged outside the pull rope; so that the safety of personnel is ensured when the pull rope on the failure side is lifted.

[0032] The safety door lifting control method has the advantages of high feasibility, after the failure of the motor on one side, signal intercommunication between the two columns, when the pull rope is lifted artificially on the failure side, the motor on the other side rotates correspondingly, so that the safety door is lifted synchronously, only one person is needed to easily control the emergency lifting of the failure safety door, and the control efficiency is high. BRIEF DESCRIPTION OF DRAWINGS

[0033] Fig. 1 The figure is a flowchart of the safety door lifting control method of the present application;

[0034] Fig. 2 The figure is a schematic diagram of the shielding door structure in the safety door lifting control method of the present application;

[0035] Fig. 3 The figure is a schematic diagram of the pull rope lifting structure in the safety door lifting control method of the present application;

[0036] In the figure: 1, column, 11, drive machine, 111, drive sprocket, 12, drive chain, 13, balance block, 2, lifting column, 21, sliding block, 22, rotating roller, 23, transmission belt, 3, pull rope. DETAILED DESCRIPTION

[0037] The following is a specific embodiment of the present application, which further describes the technical solutions of the present application, but the present application is not limited to these embodiments.

[0038] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement of modules and structures set forth in these embodiments does not limit the scope of the invention.

[0039] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0040] Techniques, methods, and systems known to a person skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the license specification.

[0041] Example 1: As Figs. 1 to 3 The image shown is merely one embodiment of the present invention. A safety door lifting control method is applicable to a safety door structure, which includes a column 1 and a pull rope 3 disposed between two adjacent columns 1. The column 1 is provided with a slider 21 for connecting to the end of the pull rope 3. The top of the column 1 is provided with a drive motor 11 for driving the slider 21 to lift. The drive motor 11 is connected to a lifting control unit, which includes a controller, a signal interconnector, and an absolute encoder connected to the rotating shaft of the drive motor 11.

[0042] In this invention, the door opening positions of different trains are statistically analyzed. Columns 1 are installed on both sides of multiple door opening positions, and a pull rope 3 is installed between two columns 1 to form a platform screen door structure. A lifting column 2 is installed on each column 1, and a slider 21 is installed on each lifting column 2. The lifting column 2 can move up and down along the column 1, and the slider 21 can also slide up and down on the lifting column 2, allowing the pull rope 3 to move up and down. Normally, the slider 21 at the end of the pull rope 3 is located at the lower part of the column 1, blocking the lower area between the two columns 1 to prevent people from falling onto the platform. When a train enters the station, the slider 21 is raised, so that the pull rope 3 is located on the upper side between the two columns 1. This allows passengers to board and alight below the pull rope 3, and all multiple door opening positions of the train are located between two columns, allowing passengers to board and alight normally regardless of the train type.

[0043] Generally, the distance between two pillars 1 is at least 9 meters, which includes at least one door opening position for each type of train. Of course, since the train is very long, there should be more pillars 1 and more sets of ropes 3 for the safety shielding of the entire platform. Because the platform screen door adopts the rope 3 structure, it is not only suitable for different trains to open the door, but also makes the entire platform screen door lighter and more energy-efficient to open and close.

[0044] And, in the lifting of the pull rope 3, the lifting column 2 is arranged on the stand column 1, the stand column 1 is provided with a counterweight 13, the top of the stand column 1 is provided with a driving machine 11 and a driving chain 12 connected with the driving machine 11, one end of the driving chain 12 is connected with the lifting column 2, and the other end of the driving chain 12 is connected with the counterweight 13; in this way, the driving machine 11 can drive the driving chain 12 to transmit and drive the lifting column 2 to lift, when the driving machine 11 rotates forward, the lifting column 2 rises and the counterweight 13 falls, and vice versa, the lifting column 2 falls and the counterweight 13 rises, and the lifting column 2 and the counterweight 13 are arranged on the two sides of the driving machine 11 respectively, so that the lifting force of the lifting column 2 is balanced, and then the driving machine 11 can complete the lifting of the lifting column 2 with smaller power.

[0045] And, the driving machine 11 is provided with a driving sprocket 111, and the driving chain 12 is meshed and connected with the driving sprocket 111, so that the lifting of the pull rope can be better matched with the rotation of the motor shaft of the driving machine.

[0046] In this way, the lifting of the pull rope 3 has the counterweight 13 to balance the gravity, so that the faulty side lifting of the pull rope is more relaxed, and one person can easily lift the pull rope.

[0047] The driving machine 11 is connected with a lifting control part, the lifting control part includes a controller, a signal interchanger and an absolute value encoder connected with the rotating shaft of the driving machine 11, the absolute value encoder and the signal interchanger are electrically connected with the controller, the absolute value encoder continuously works to continuously acquire the rotation amount of the rotating shaft of the driving machine, and the signal interchanger is only used when one side motor fails.

[0048] The method comprises the following steps:

[0049] S1: judging whether the driving machine works normally or not, if yes, no operation is performed, otherwise, step S2 is executed;

[0050] Under normal circumstances, the driving machine drives the pull rope to lift under the driving control, and the pull rope does not need to be lifted by manpower; once one side driving machine fails, the stand columns on the two sides of the pull rope need to be matched to make the pull rope lift under the control of the manpower, that is, step S2 is executed.

[0051] In the present application, when step S1 is executed, the judgment standard that the driving machine does not work normally is that the driving machine does not respond after a preset time exceeds after a driving signal is sent to the driving machine.

[0052] And, as an embodiment of the present application, when executing step S1, an alarm is sent out when the drive machine does not work normally, and step S2 is executed; of course, the alarm mode includes a sound alarm and a flashing alarm, since the drive control has sent a drive signal to the drive machine, that is, the safety door needs to be lifted and displaced, but the drive machine does not respond, so an alarm needs to be sent out to remind the staff to manually lift the safety door.

[0053] For example, when the safety door is in a closed state, that is, the pull rope is at the bottom, at this time the pull rope separates the platform and the train, if a train enters the station, the drive control sends an opening signal to the drive machine, but the drive machine does not respond, at this time an alarm is sent out, the staff manually lifts the pull rope to make the safety door open, so as to facilitate the train to pick up and drop off passengers.

[0054] S2: mark the lifting control part at the abnormal drive machine as a first control part, and mark the lifting control part at the drive machine at the other end of the pull rope as a second control part; the controller of the first control part acquires the absolute value encoder reading in real time;

[0055] Here, the side that the drive machine does not respond to is actually the abnormal side, and the other end of the pull rope is the normal side, the drive machine at the abnormal side is marked as a first drive machine, and the lifting control part at the abnormal side is marked as a first control part; the drive machine at the normal side is marked as a second drive machine, and the lifting control part at the normal side is marked as a second control part.

[0056] At this time, manual lifting control of the safety door pull rope is needed, at this time the system automatically opens the controllers of the first control part and the second control part and the signal interchanger, and then the controller of the first control part acquires the absolute value encoder reading in real time.

[0057] S3: judge whether the absolute value encoder reading of the first control part changes; if yes, execute step S4; otherwise, do not execute the operation;

[0058] Here, the change of the absolute value encoder reading of the first control part means that the controller of the first control part acquires the absolute value encoder reading as an initial reading at step S2, and the absolute value encoder reading of the first control part changes compared with the initial reading when executing step S3.

[0059] At this time, the platform staff arrives at the position where the drive machine is abnormal, manually controls the lifting of the safety door pull rope according to the information of the train entering and leaving the station, and takes the safety door opening as an example, that is, the pull rope needs to be lifted.

[0060] The platform staff lifts the pull rope on the abnormal side, the rising of the pull rope is transmitted to the rotating shaft of the driving machine through the driving chain (the driving machine fails, but the rotating shaft can still rotate), so the reading of the absolute value encoder also changes; on the contrary, if the reading of the absolute value encoder of the first control part changes, then personnel are controlling the lifting of the pull rope, at this time, the next step S4 of synchronously lifting the two ends of the safety door pull rope needs to be continued.

[0061] S4: The controller of the first control part sends the reading of the absolute value encoder of the first control part to the controller of the second control part in real time through the signal intercommunicator.

[0062] Here, when step S4 is executed, specifically:

[0063] S41: Establish intercommunication connection between the signal intercommunicator of the first control part and the signal intercommunicator of the second control part.

[0064] S42: The controller of the first control part sends the reading of the absolute value encoder of the first control part to the signal intercommunicator of the second control part every interval of a predetermined time value through the signal intercommunicator.

[0065] S43: The controller of the second control part reads the reading of the absolute value encoder of the first control part received by the signal intercommunicator of the second control part.

[0066] S5: The controller of the second control part drives the driving machine to work, so that the reading of the absolute value encoder of the second control part is the same as that of the first control part.

[0067] After the controller of the second control part receives the reading of the absolute value encoder of the first control part, the driving machine on the normal side is driven to work according to the reading of the absolute value encoder of the first control part, so that the pull rope on the normal side is lifted, and the height of the two ends of the pull rope is maintained the same, that is, the two ends of the pull rope are synchronously lifted.

[0068] It should be noted that the height of the pull rope on the abnormal side is always changing, when step S42 is executed, the controller of the first control part sends the real-time reading of the absolute value encoder of the first control part to the signal intercommunicator of the second control part every interval of a predetermined time value through the signal intercommunicator, then when step S5 is executed, the controller of the second control part controls the driving machine to work every interval of a predetermined time, so that the height of the pull rope on the normal side is maintained the same as that of the pull rope on the abnormal side.

[0069] In summary, the balance structure of the balance block makes it very easy to lift the pull rope, and a staff with less strength can easily lift the pull rope, and the pull rope on the other side is also lifted, so only one person can easily complete the lifting control of the entire safety door pull rope.

[0070] Embodiment two: still as Figs. 1 to 3 shown, only one of the embodiments of the present application, on the basis of embodiment one, the present application is a safe door lifting control method,

[0071] In the execution step S3, whether the absolute value encoder reading of the first control part changes and the change value is greater than the predetermined threshold value, if yes, then step S4 is executed.

[0072] That is, the abnormal side of the pull rope needs to meet the sufficient displacement distance, to ensure that the staff has lifted the pull rope, and the normal side responds to synchronous lifting, to avoid the rope being blown by the wind when the motor fails, and the normal side also responds to the incident.

[0073] Also, in the execution step S5, specifically:

[0074] S51: the controller of the second control part judges whether the absolute value encoder reading of the first control part is greater than the absolute value encoder reading of the second control part, if yes, step S52 is executed; otherwise, step S53 is executed.

[0075] S52: the controller of the second control part drives the drive machine to work in the forward direction, so that the absolute value encoder reading of the second control part is the same as the absolute value encoder reading of the first control part;

[0076] S53: the controller of the second control part drives the drive machine to work in the reverse direction, so that the absolute value encoder reading of the second control part is the same as the absolute value encoder reading of the first control part.

[0077] Here, the encoder reading increases, indicating that the pull rope rises, and the drive machine rotates in the forward direction, which also drives the pull rope to rise; then the controller of the second control part can judge whether the pull rope on the abnormal side rises or falls according to the change of the absolute value encoder reading of the first control part, so as to control the drive machine on the normal side to rotate forward or reverse, so that the height of the pull rope on the normal side is synchronized with the height of the pull rope on the abnormal side.

[0078] It should be noted that the lifting column 2 is provided with a rotating roller 22, the rotating roller 22 is provided with a transmission belt 23, one end of the transmission belt 23 is connected with the sliding block 21, and the other end of the transmission belt 23 away from the sliding block 21 is connected with the stand column 1.

[0079] The sliding block 21 can slide along the lifting column 2, and the rotating roller 22 is not self-powered, and the rotating power of the rotating roller 22 is derived from the lifting of the lifting column 2; when the driving machine 11 drives the lifting column 2 to rise, the stand column 1 itself descends relative to the lifting column 2, so that the end of the transmission belt 23 connected with the stand column 1 is displaced downward relative to the lifting column 2, and then the sliding block 21 is naturally lifted relative to the lifting column 2 under the driving of the transmission belt 23.

[0080] The sliding block 21 is connected with the end of the pull rope 3, and then when the driving machine 1 drives the lifting column 2 to rise, the pull rope 3 has two-stage rising.

[0081] Thus, the two-stage rising structure is used to lift the pull rope 3 to complete the opening and closing of the shielding door structure, and the lifting of the lifting column 2 has the weight balance of the balancing block 13, so that the driving machine 11 only needs small power to drive the pull rope 3 to rise and fall with a larger height, which has good energy-saving effect; the pull rope 3 is lifted to facilitate passengers to get on and off the train, and the pull rope is lowered to effectively prevent people from falling off the platform, which has high safety.

[0082] Of course, the pull rope 2 is provided with an insulating shielding layer outside; so that the personnel safety is ensured when the pull rope is artificially lifted on the fault side.

[0083] The safety door lifting control method has high feasibility, after the fault of one side motor, the signal intercommunication between the two stand columns is realized, when the pull rope is artificially lifted on the fault side, the motor on the other side is correspondingly rotated, so that the safety door is synchronously lifted, only one person is needed to easily control the emergency lifting of the fault safety door, and the control efficiency is high.

[0084] The present application is not limited to the above specific embodiments, and various modifications and changes can be made to the present application. Any modification, equivalent replacement, improvement, etc. made to the above embodiments according to the technical essence of the present application should be included in the protection scope of the present application.

Claims

1. A safety door lifting control method, applicable to a safety door structure, the structure including a column (1) and a pull rope (3) disposed between two adjacent columns (1), the column (1) is provided with a slider (21) for connecting to the end of the pull rope (3), the top of the column (1) is provided with a drive motor (11) for driving the slider (21) to lift, the drive motor (11) is connected to a lifting control unit, the lifting control unit includes a controller, a signal interconnector and an absolute encoder connected to the rotating shaft of the drive motor (11); Its features are, The method includes the following steps: S1: Determine if the drive is working properly. If yes, do not perform the operation; otherwise, proceed to step S2. S2: Mark the lifting control unit at the abnormal drive motor as the first control unit, and mark the lifting control unit at the drive motor at the other end of the pull rope as the second control unit; the controller of the first control unit acquires the absolute encoder reading in real time; S3: Determine whether the absolute encoder reading of the first control unit has changed and the change value is greater than a predetermined threshold; if so, proceed to step S4; otherwise, do not perform the operation. S4: The controller of the first control unit sends the absolute encoder reading of the first control unit to the controller of the second control unit in real time through the signal interconnect; S5: The controller of the second control unit drives the drive motor to work, so that the absolute encoder reading of the second control unit is the same as the absolute encoder reading of the first control unit.

2. The safety door lifting control method according to claim 1, characterized in that: When performing step S1, the criterion for judging that the drive is not working properly is: after sending a drive signal to the drive, the drive still does not respond after a preset time.

3. The safety door lifting control method according to claim 1, characterized in that: When performing step S1, if the drive is not working properly, an alarm is issued and step S2 is performed. Alarm methods include sound alarms and flashing alarms.

4. The safety door lifting control method according to claim 1, characterized in that: When performing step S2, the controllers of the first control unit and the second control unit, as well as the signal interconnect, are turned on, and then the controller of the first control unit acquires the absolute encoder reading in real time.

5. The safety door lifting control method according to claim 4, characterized in that: When performing step S4, the specific steps are as follows: S41: Establish an interconnection between the signal interconnection device of the first control unit and the signal interconnection device of the second control unit; S42: At each predetermined time interval, the controller of the first control unit sends the absolute encoder reading of the first control unit to the signal interconnect of the second control unit through the signal interconnect; S43: The controller of the second control unit reads the absolute encoder reading of the first control unit received by the signal interconnect of the second control unit.

6. The safety door lifting control method according to claim 1, characterized in that: When performing step S5, the specific steps are as follows: S51: The controller of the second control unit determines whether the absolute encoder reading of the first control unit is greater than the absolute encoder reading of the second control unit. If so, step S52 is executed; otherwise, step S53 is executed. S52: The controller of the second control unit drives the drive motor to rotate in the forward direction, so that the absolute encoder reading of the second control unit is the same as the absolute encoder reading of the first control unit. S53: The controller of the second control unit drives the drive motor to rotate in the opposite direction, so that the absolute encoder reading of the second control unit is the same as the absolute encoder reading of the first control unit.

7. The safety door lifting control method according to claim 1, characterized in that: The column (1) is provided with a balance block (13) and a lifting column (2) for connecting to the pull rope (3); the slider (21) is provided on the lifting column (2); the drive motor (11) is connected to a drive chain (12); one end of the drive chain (12) is connected to the lifting column (2); the end of the drive chain (12) away from the lifting column (2) is connected to the balance block (13); the lifting column (2) is provided with a rotating roller (22); the rotating roller (22) is provided with a transmission belt (23); one end of the transmission belt (23) is connected to the slider (21); the end of the transmission belt (23) away from the slider (21) is connected to the column (1).

8. A safety door lifting control method according to claim 7, characterized in that: A drive sprocket (111) is provided on the shaft of the drive motor (11), and the drive chain (12) is meshed with the drive sprocket (111).

9. A method for controlling the lifting and lowering of a safety door according to claim 1, characterized in that: An insulating shielding layer is provided on the outside of the pull rope (3).

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