Anti-freezing and anti-snow control method for platform door

Abstract

The invention provides an anti-freezing and anti-snow control method for a platform door, which relates to the technical field of high-speed rail platform doors and comprises the following steps: S1, judging whether the current temperature is lower than a preset temperature value or not in real time; if yes, executing the step S2; otherwise, not executing the step; s2, whether there is no train entering the station at the platform door within the first preset time is judged; if yes, executing the step S3; otherwise, executing the step S4; s3, the driver controls the motor to operate until all the pull ropes are lifted up, all the pull ropes are put down, and the step S1 is executed after second preset time; and S4, the driver controls the oscillating circuit to output oscillating current reciprocating in two directions to the motor for a third preset time, and the step S1 is returned. When a low-temperature environment occurs, motor high-frequency vibration or platform door low-frequency lifting is carried out according to the train arrival time, snow and freeze prevention is carried out on the platform door structure, it is ensured that the platform door structure can normally work at any time, and stability and safety are high.

Description

Technical Field

[0001] The present invention relates to the technical field of high-speed railway platform doors, and in particular, to a platform door anti-freezing and anti-snow control method. Background Art

[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 trends in various regions, the actual demand for rail vehicles varies greatly, including subways within cities (including underground railways and above-ground urban railways), trains between cities (including EMUs, high-speed trains and ordinary trains), etc., which are collectively referred to as rail transit vehicles.

[0003] The platforms of these rail transit vehicles have a large flow of people and the rail transit runs at a high speed. It is necessary to set up a shield door on 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; however, high-speed rail platforms are generally designed in the open field and are greatly affected by temperature changes, especially in the north where the winter is long and the temperature is extremely low. Once it rains or snows, the platform doors are easy to freeze. At present, the use of high-speed rail platform shield doors is relatively small. The anti-freeze design of high-speed rail platform door columns is completely blank in the market. It can only refer to the anti-freeze structure of the platform door of the subway rail transit. For example, the Chinese patent invention CN105986742A discloses a rail transit anti-freeze platform door, whose fixed door is a semi-enclosed box, and the movable door is extended or retracted into the fixed door box through a parallel transmission mechanism to open and close the movable door; a heating device is provided on both the fixed door and the movable door. Thus, the fixed door and the movable door can be effectively insulated to prevent frost / ice on the movable door and the transmission mechanism, so that it can operate normally in a low temperature environment. The guide rail is fixed in the fixed door box, and the slider is fixed on the movable door. Since the guide rail is arranged inside the fixed door box and is in a closed space, it has better thermal insulation, and can better protect the guide rail while reducing energy loss. The guide rail arranged in the fixed door box is a retractable guide rail; when the movable door extends out of the fixed door box, its guide rail retracts. An emergency door is arranged in the blank area without a guide rail on the fixed door box, which can effectively solve the problem that an emergency door cannot be arranged on the fixed door of the box structure.

[0004] However, the above-mentioned rail transit antifreeze platform door still has the following disadvantages: it can still only be used on subway rail transit platforms, and cannot be used on high-speed rail platforms, and cannot effectively prevent freezing of the door columns of the high-speed rail platform door lifting structure. The intervals for entering high-speed rail stations also vary greatly, making it very easy for high-speed rail doors to freeze, resulting in the inability to perform normal door opening and closing operations when the high-speed rail enters the station.

[0005] Therefore, in order to solve the above problems, it is necessary for us to design a reasonable platform door anti-freeze and anti-snow control method. Summary of the invention

[0006] The purpose of the present invention is to provide a platform door anti-freezing and anti-snow control method. When a low temperature environment occurs, the motor is vibrated at a high frequency or the platform door is raised and lowered at a low frequency according to the train entry time, so as to protect the platform door structure from snow and freezing, thereby ensuring that the platform door structure can work normally at any time with high stability and high safety.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions: A platform door anti-freezing and anti-snow control method, the method comprising the following steps: S1: Determine in real time whether the current temperature is lower than the preset temperature value; if so, execute step S2; otherwise, do not execute the step; S2: Determine whether there is no train entering the station within the first preset time at the platform door; if yes, execute step S3; otherwise, execute step S4; S3: the driver controls the motor to operate until all the pull ropes are lifted up, then puts down all the pull ropes, and returns to step S1 after a second preset time; S4: The driver controls the oscillation circuit to output an oscillating current in two reciprocating directions to the motor for a third preset time, and then returns to step S1.

[0008] As a preferred embodiment of the present invention, when executing step S1, the preset temperature value is not lower than zero degrees Celsius.

[0009] As a preferred embodiment of the present invention, before executing step S2, a first preset time value is generated according to the current temperature value.

[0010] As a preferred embodiment of the present invention, when step S3 is performed, specifically: S31: The driver controls the motor to run and drives the platform door to rise; S32: Determine whether all platform door pull ropes have risen by no less than a preset distance; if so, execute step S33; otherwise, continue to execute step S31; S33: The driver controls the motor to run and drive the platform door to lower; S34: Determine whether the platform door has dropped to the lower limit position, if so, execute step S35; otherwise, continue to execute step S33; S35: Count the second preset time, and return to step S2.

[0011] As a preferred embodiment of the present invention, before executing step S3, a second preset time value is generated according to the current temperature value.

[0012] As a preferred embodiment of the present invention, before executing step S32, a preset distance value is generated.

[0013] As a preferred embodiment of the present invention, when step S4 is performed, specifically: S41: The driver controls the oscillation circuit to output oscillating current in two reciprocating directions to the motor; S42: Determine whether the current temperature is lower than a preset temperature value; if so, continue to execute step S41; otherwise, execute step S43; S43: timing a third preset time, the oscillation circuit stops outputting the oscillation current, and returns to step S1.

[0014] As a preferred embodiment of the present invention, before executing step S4, a third preset time value is generated according to the current temperature value.

[0015] As a preferred embodiment of the present invention, when executing step S4, the driver controls the oscillation circuit to output a high-frequency reciprocating oscillating current in two directions to the motor; Oscillating current includes sinusoidal current and square wave current; The reciprocating frequency of the oscillating current is not less than 100 Hz.

[0016] As a preferred embodiment of the present invention, a heating film is provided at the power supply of the driver; In executing steps S3 and S4, when the driver is working, the power supply supplies power to the heating film.

[0017] The platform door antifreeze and snow control method of the present invention has the following beneficial effects: When a low temperature environment occurs, the motor is vibrated at a high frequency or the platform door is raised and lowered at a low frequency according to the time the train enters the station, to protect the platform door structure from snow and frost, ensuring that the platform door structure can work normally at any time with high stability and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A flow chart of a platform door anti-freeze and anti-snow control method provided in an embodiment of the present application. DETAILED DESCRIPTION

[0020] The following are specific embodiments of the present invention, which further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0021] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangements of modules and structures set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

[0022] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0023] Technologies, methods, and systems known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and systems should be considered part of the authorization specification.

[0024] Embodiment 1: Figure 1 The figure is only one of the embodiments of the present invention, a platform door anti-freezing and anti-snow control method, used in the high-speed railway platform door structure, the platform door structure includes at least two columns and a plurality of pull ropes arranged between two adjacent columns to form a platform pull rope door, a fixed column and a movable column are arranged on the column, a motor for controlling the lifting of the movable column is arranged on the fixed column, the end of the pull rope is connected to the movable column, when the motor is working, the platform pull rope door will be raised and lowered, and the power supply for the motor is arranged on the fixed column.

[0025] The method comprises the following steps: S1: Determine in real time whether the current temperature is lower than the preset temperature value; if so, execute step S2; otherwise, do not execute the step; When executing step S1, the preset temperature value is not lower than zero degrees Celsius. It should be noted that the preset temperature value can be set in advance. Under normal circumstances, it can be set to zero degrees Celsius. In special areas where there may be extreme weather such as sudden temperature changes or freezing rain, the preset temperature value can be set to 2 to 4 degrees Celsius.

[0026] Generally speaking, a thermometer is provided on the platform door to obtain the temperature of the environment where the platform door is located in real time. Once the current ambient temperature is lower than the preset temperature value, the platform door may be covered with ice or snow, and it is necessary to execute step S2 to enter the anti-snow and anti-freeze mode; otherwise, if the current temperature is not lower than the preset temperature value, even if rain and dew fall on the platform door pillars, it is difficult to freeze, or if snow falls on the platform door, since the temperature is not lower than the preset temperature value, the snow will melt and fall and will be difficult to accumulate. There is no need to enter the anti-snow and anti-freeze mode and no operation is performed.

[0027] S2: Determine whether there is no train entering the station within the first preset time at the platform door; if yes, execute step S3; otherwise, execute step S4; After entering the anti-snow and anti-freeze mode, the platform door, including the motor and the pull rope, needs to be protected from snow and frost, which needs to be targeted differently according to the current working conditions of the platform door; If a train enters the station after a period of time (within the first preset time), it means that the platform door and the pull rope are about to be raised or lowered. The pull rope does not need to be protected from snow or freezing, and only the motor needs to be protected from snow or freezing, and step S4 is executed; On the contrary, if no train enters the station after a period of time (within the first preset time), it means that the platform door and the pull rope will not be raised or lowered in a short period of time, and the motor and the pull rope need to be protected from snow and frost, and step S3 is executed.

[0028] S3: the driver controls the motor to operate until all the pull ropes are lifted up, then puts down all the pull ropes, and returns to step S1 after a second preset time; When no trains enter the station for a period of time, the motor and the rope need to be protected from snow and freezing. At this time, the motor driver controls the motor to operate, lifts all the ropes, and then lowers the ropes, which is a process of raising and lowering the platform door. The motor and the rope door are working and operating, effectively shaking off the accumulated snow and ice at the motor and the rope door to ensure the activity of the transmission structure.

[0029] When executing step S3, the driver actually controls the motor to operate so that the pull-rope door is opened and closed quickly, then remains still for a second preset time, and returns to step S1.

[0030] It should be noted that all pull ropes are lifted, which means that all pull ropes have been moved to avoid the accumulation of ice and snow. At this time, the platform pull rope door is not fully opened, which can effectively prevent passengers from falling under the platform.

[0031] S4: The driver controls the oscillation circuit to output an oscillating current in two reciprocating directions to the motor for a third preset time, and then returns to step S1.

[0032] When a train enters the station within a period of time, it is only necessary to protect the motor from snow and frost. At this time, the driver controls the oscillation circuit to output oscillating current in two reciprocating directions to the motor, so that the motor does not drive the pull rope to rise or fall, but the internal rotor of the motor idles back and forth and shakes rapidly. When shaking, kinetic energy is converted into internal energy, which can cause the temperature of the motor to rise, and can effectively transmit the entire vibration to the entire platform door motion structure, shaking off the snow and ice on the motor and the motion structure. It is not easy to adhere to dust and water droplets, thereby ensuring the movement activity of the platform door.

[0033] When executing step S4, the driver actually controls the oscillation circuit to output an oscillating current in two reciprocating directions to the motor. After the motor temperature rises to above the preset temperature value (generally 5 degrees Celsius), it continues for a third preset time to melt the snow and ice on the motor and platform columns, and then returns to step S1.

[0034] It should be noted that executing step S3 consumes more power and the platform door has a small opening; executing step S4 consumes less power and the platform door pull rope does not rise at all; so in a low temperature environment, according to the time when the train enters the station, the motor is vibrated at a high frequency or the platform door is raised and lowered at a low frequency, and the one with less energy consumption and higher safety is selected to protect the platform door structure from snow and frost, ensuring that the platform door structure can work normally at any time with high stability and high safety.

[0035] In addition, whether it is the high-frequency vibration of the motor or the low-frequency lifting and lowering of the platform door, the battery will discharge and the battery will have a temperature rise, so that the battery will have a thermal insulation effect when preventing snow and freezing.

[0036] Embodiment 2: It is only one of the embodiments of the present invention. On the basis of Embodiment 1, in a platform door anti-freeze and anti-snow control method of the present invention, before executing step S2, a first preset time value is generated according to the current temperature value. The lower the current temperature, the smaller the first preset time value. That is, after the anti-snow and anti-freeze mode is implemented, the probability of selecting both the motor and the pull rope for anti-snow and anti-freeze is greater.

[0037] Generally speaking, the first preset time range is between 30 minutes and 2 hours. For example, if the temperature is not higher than -5°C, the first preset time value is set to 2 hours; if the temperature is not higher than -10°C, the first preset time value is set to 1 hour; if the temperature is not higher than -15°C, the first preset time value is set to half an hour.

[0038] That is, when the temperature in the platform area drops to no higher than -5℃, if there is no train entering the station within two hours, that is, the platform door will not be opened for at least the next two hours, and there is a high probability that there will be no passengers on the platform, then the rope will be pulled to pre-raise the platform. On the contrary, if there is a train entering the station within two hours, the motor will be shaken; when the platform area is further cooled to no higher than -10℃, if there is no train entering the station within an hour, that is, the platform door will not be opened for at least the next hour, and there is a high probability that there will be no passengers on the platform, then the rope will be pulled to pre-raise the platform. On the contrary, if there is an hour If a train enters the station, the motor will be shaken; in extremely low temperatures, when the temperature in the platform area drops sharply until it is no higher than -15℃, if no train enters the station within half an hour, that is, the platform door will not be opened for at least the next half an hour, and there is a high probability that there will be no passengers on the platform, then the rope will be pulled to pre-raise the platform. Conversely, if a train enters the station within half an hour, the motor will be shaken; the first preset time of not less than 30 minutes is also for safety reasons. Generally, people will not enter the station and wait for their ride more than half an hour in advance when taking the high-speed rail, that is, there is a high probability that there will be no passengers in the station half an hour before the train enters the station.

[0039] Similarly, before executing step S3, a second preset time value is generated according to the current temperature value. The lower the current temperature is, the smaller the second preset time value is, that is, the interval of low-frequency rise and fall is smaller.

[0040] Generally speaking, the second preset time range is between 10 minutes and 20 minutes. For example, if the temperature is not higher than -10°C, the second preset time is set to 20 minutes; if the temperature is not higher than -15°C, the second preset time is set to 10 minutes. The main consideration here is how long it will take for the pull-rope column to freeze at the current temperature. The second preset time cannot be longer than the freezing time. Before the pull-rope column freezes, a new round of snow and anti-freeze control is carried out.

[0041] And, before executing step S4, a third preset time value is generated according to the current temperature value. The lower the current temperature is, the larger the third preset time value is, that is, the duration of the high-frequency vibration is longer.

[0042] Generally speaking, the third preset time range is between 3 minutes and 10 minutes, for example: when the temperature is -5°C, the third preset time value is set to 3 minutes; when the temperature is not higher than -10°C, the third preset time value is set to 5 minutes; here it is mainly considered that the time it takes for the motor to be heated to the thawing temperature at the current temperature due to the internal energy generated by the electric oscillation. Generally, the lower the temperature (the temperature is not higher than -10°C), the slower the heating is, and it takes 10 minutes to heat up to the optimal thawing temperature of 4 degrees Celsius; conversely, the higher the temperature (the temperature is -5°C), the faster the heating is, and the longer it takes to heat up to the thawing temperature, and it only takes 3 minutes to heat up to the optimal thawing temperature of 4 degrees Celsius.

[0043] How long will it take for the pull-rope column to freeze at the current temperature? The third preset time cannot be longer than the freezing time. Before the pull-rope column freezes, a new round of snow and anti-freeze control is carried out.

[0044] As one of the embodiments of the present invention, when executing step S3, specifically: S31: The driver controls the motor to run and drives the platform door to rise; S32: Determine whether all platform door pull ropes have risen by no less than a preset distance; if so, execute step S33; otherwise, continue to execute step S31; S33: The driver controls the motor to run and drive the platform door to lower; S34: Determine whether the platform door has dropped to the lower limit position, if so, execute step S35; otherwise, continue to execute step S33; S35: Count the second preset time, and return to step S2.

[0045] Here, before executing step S32, a preset distance value is generated.

[0046] As one of the embodiments of the present invention, when executing step S4, specifically: S41: The driver controls the oscillation circuit to output oscillating current in two reciprocating directions to the motor; S42: Determine whether the current temperature is lower than a preset temperature value; if so, continue to execute step S41; otherwise, execute step S43; S43: timing a third preset time, the oscillation circuit stops outputting the oscillation current, and returns to step S1.

[0047] Here, when executing step S4, the driver controls the oscillation circuit to output high-frequency reciprocating oscillating current in two directions to the motor; Oscillating current includes sinusoidal wave current, square wave current, rectangular wave current and sawtooth wave current.

[0048] The reciprocating frequency of the oscillating current is not less than 50Hz.

[0049] As one of the embodiments of the present invention, a heating film is provided at the power supply of the driver. Actually, the power supply is a battery pack, and the heating film is wrapped around the outside of the battery pack. In executing steps S3 and S4, when the driver is working, the power supply supplies power to the heating film, and can also play a certain role in temperature rise and heat preservation at the battery, effectively preventing snow and freezing.

[0050] The present invention provides a platform door anti-freezing and anti-snow control method. When a low temperature environment occurs, the motor is vibrated at a high frequency or the platform door is raised and lowered at a low frequency according to the train entry time, so as to prevent the platform door structure from snow and freezing, thereby ensuring that the platform door structure can work normally at any time with high stability and high safety.

[0051] The present invention is not limited to the above specific implementations, and the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made to the above implementations based on the technical essence of the present invention shall be included in the protection scope of the present invention.

Claims

1. A platform door anti-freezing and anti-snow control method, characterized in that: The following steps are involved: S1: Determine in real time whether the current temperature is lower than the preset temperature value; If yes, then execute step S2; otherwise, do not execute the step; S2: Determine whether there is no train entering the station within the first preset time at the platform door; if yes, execute step S3; otherwise, execute step S4; S3: the driver controls the motor to operate until all the pull ropes are lifted up, then puts down all the pull ropes, and returns to step S1 after a second preset time; S4: The driver controls the oscillation circuit to output an oscillating current in two reciprocating directions to the motor for a third preset time, and then returns to step S1.

2. A platform door antifreeze and anti-snow control method according to claim 1, characterized in that: When executing step S1, the preset temperature value is not lower than zero degrees Celsius.

3. A platform door antifreeze and anti-snow control method according to claim 1, characterized in that: Before executing step S2, a first preset time value is generated according to the current temperature value.

4. A platform door antifreeze and anti-snow control method according to claim 1, characterized in that: When executing step S3, specifically: S31: The driver controls the motor to run and drives the platform door to rise; S32: Determine whether all platform door pull ropes have risen by no less than a preset distance; if so, execute step S33; otherwise, continue to execute step S31; S33: The driver controls the motor to run and drive the platform door to lower; S34: Determine whether the platform door has dropped to the lower limit position, if so, execute step S35; otherwise, continue to execute step S33; S35: Count the second preset time, and return to step S2.

5. A platform door antifreeze and anti-snow control method according to claim 1, characterized in that: Before executing step S3, a second preset time value is generated according to the current temperature value.

6. A platform door antifreeze and anti-snow control method according to claim 4, characterized in that: Before executing step S32, a preset distance value is generated.

7. A platform door antifreeze and anti-snow control method according to claim 1, characterized in that: When executing step S4, specifically: S41: The driver controls the oscillation circuit to output oscillating current in two reciprocating directions to the motor; S42: Determine whether the current temperature is lower than a preset temperature value; if so, continue to execute step S41; otherwise, execute step S43; S43: timing a third preset time, the oscillation circuit stops outputting the oscillation current, and returns to step S1.

8. A platform door antifreeze and anti-snow control method according to claim 1, characterized in that: Before executing step S4, a third preset time value is generated according to the current temperature value.

9. A platform door antifreeze and anti-snow control method according to claim 7, characterized in that: When executing step S4, the driver controls the oscillation circuit to output a high-frequency reciprocating oscillating current in two directions to the motor; Oscillating current includes sinusoidal current and square wave current; The reciprocating frequency of the oscillating current is not less than 100 Hz.

10. A platform door anti-freezing and anti-snow control method according to claim 1, characterized in that: A heating film is provided at the power supply of the driver; In executing steps S3 and S4, when the driver is working, the power supply supplies power to the heating film.

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