Main fan switching method, switching device and ventilation system

Abstract

This application provides a method, device, and system for switching main fan ventilators. The method includes: controlling a first damper drive device to move a first damper to a closed position, causing the first damper to seal a first door frame. The first damper is the damper corresponding to a running main fan ventilator. The closed position is a position limited by a limit switch or a position reached by moving a predetermined distance from a first initial position. The first initial position is a position where the first damper does not completely obstruct the first door frame. The method also includes controlling a second damper drive device to move a second damper to a second initial position, causing the second damper to open a second door frame. The second damper is the damper corresponding to a non-running main fan ventilator. The second initial position is a position where the second damper does not completely obstruct the second door frame. This method solves the problem of airflow turbulence caused by the main fan damper not being fully raised in the prior art.

Description

Technical Field

[0001] This application relates to the field of coal mine ventilation technology, and more specifically, to a method for switching main fan ventilators, a switching device, a computer-readable storage medium, a processor, and a ventilation system. Background Technology

[0002] According to the "Coal Mine Safety Regulations," the main ventilation fan must be switched off monthly (main / standby switching operation), or switched to another main ventilation fan if there are abnormalities such as power supply issues or fan malfunctions. However, during each main ventilation fan switchover, the damper often fails to lift properly or cannot be lifted under abnormal conditions, leading to repeated switching. In severe cases, even if the main ventilation fan switching operation is normal, if the damper fails to lift properly or malfunctions, it will inevitably cause a short circuit in the mine's airflow, resulting in turbulent underground airflow. This can lead to alarms for exceeding limits of toxic and harmful gases such as methane and carbon monoxide, ultimately resulting in a major safety accident with fatalities due to poisoning and asphyxiation of personnel or explosions caused by the accumulation of methane gas.

[0003] When the ventilation door winch hoisting device malfunctions, it can cause the wire rope to break, become entangled, or jam, or the climbing rope to break or roll back, resulting in the ventilation door not being able to be lifted properly or failing to lift at all. This can lead to short circuits in the mine's airflow, turbulent airflow, alarms for excessive levels of toxic and harmful gases such as methane and carbon monoxide, and accidents such as mine collapse and loss of life. Due to various factors and the tight switching time required by regulations, the psychological pressure on personnel, and varying levels of operational proficiency, if the switching time exceeds the 10-minute requirement of the "Coal Mine Safety Regulations" or is repeated multiple times, then multiple people, including the main fan driver, supervisor, electrician, technician, and deputy team leader, need to be arranged on-site for on-site supervision, operation, and handling of abnormal emergencies. Multiple sets of surface main ventilation fans in multiple mining areas need to be switched simultaneously each month. Too few personnel on-site pose significant safety hazards, while too many personnel cause considerable inconvenience to the normal coordination work of the grassroots teams.

[0004] The information disclosed above in the background section is only intended to enhance the understanding of the background art of the art described herein. Therefore, the background art may contain certain information that does not constitute prior art known to those skilled in the art in this country. Summary of the Invention

[0005] The main objective of this application is to provide a method, device, computer-readable storage medium, processor, and ventilation system for switching main fan ventilators, in order to solve the problem of airflow turbulence caused by the incomplete lifting of the damper of the main fan ventilator in the prior art.

[0006] According to one aspect of the present invention, a method for switching main fan ventilators is provided. The main fan ventilator unit includes two main fan ventilators, a first damper, a second damper, a first door frame, a second door frame, a limiter, a first damper drive device, and a second damper drive device. The first damper drive device is connected to the first damper and is used to drive the first damper to move along a track of the first door frame. The second damper drive device is connected to the second damper and is used to drive the second damper to move along a track of the second door frame. The limiter is located on the side frame at one end of the track of the first door frame. The method includes: controlling the first damper drive device to drive the first damper to move along a track of the second door frame. The first damper moves to the closed position, thereby sealing the first door frame. The first damper is the damper corresponding to the main fan that is in operation. The closed position is the position limited by the limit switch or the position reached by moving a predetermined distance from the first initial position. The first initial position is the position where the first damper does not obstruct the first door frame at all. The second damper drive device is controlled to drive the second damper to move to the second initial position, thereby opening the second door frame. The second damper is the damper corresponding to the main fan that is not in operation. The second initial position is the position where the second damper does not obstruct the second door frame at all.

[0007] Optionally, the limiter includes a high limit sensor and a low limit sensor. The high limit sensor is located on the highest edge of the first door frame, and the low limit sensor is located on the lowest edge of the first door frame. The length direction of the track of the first door frame is vertical. Controlling the first damper drive device to drive the first damper to the closed position, so that the first damper seals the door frame corresponding to the first damper, includes: controlling the first damper drive device to drive the first damper to move along the track of the first door frame; and controlling the first damper drive device to stop driving the first damper to move when both the high limit signal and the low limit signal are received simultaneously. The high limit signal is the signal generated by the high limit sensor detecting the first damper, and the low limit signal is the signal generated by the low limit sensor detecting the first damper.

[0008] Optionally, the first damper driving device includes a motor, an opening plate, and an opening plate timing device. The motor rotates to drive the opening plate to rotate at a constant speed. The opening plate timing device detects the rotation time of the opening plate and controls the first damper driving device to drive the first damper to the closed position, so that the first damper seals the door frame corresponding to the first damper. This includes: obtaining the detection time of the opening plate timing device, where the detection time is the product of a count and a predetermined time, and the count is the number of holes of the opening plate that have passed the detection position of the opening plate timing device; and when the detection time reaches the predetermined time, controlling the first damper driving device to stop driving the first damper to move.

[0009] Optionally, the main fan ventilation unit further includes a control cabinet, which is electrically connected to the main fan ventilation unit at least. Before controlling the first damper drive device to move the first damper to the closed position, the method further includes: acquiring monitoring information from the control cabinet, the monitoring information including the operating status information of the main fan ventilation unit, the operating status including normal status information and abnormal status information; and, upon receiving the abnormal status information of the main fan ventilation unit in operation and the normal status information of the main fan ventilation unit not in operation, sending a switching command to the control cabinet, the switching command being used to control the first damper to seal the first door frame and control the second damper to open the second door frame.

[0010] Optionally, the main fan ventilation unit further includes a main power supply, a backup power supply, and an ATS circuit. The ATS circuit includes a first power supply circuit, a second power supply circuit, and a switch. One end of the first power supply circuit is electrically connected to the main power supply, and the other end of the first power supply circuit is electrically connected to the switch. One end of the second power supply circuit is electrically connected to the backup power supply, and the other end of the second power supply circuit is electrically connected to the switch. The switch is at least electrically connected to a first damper drive device and a second damper drive device. The switch is used to switch between the first power supply circuit and the second power supply circuit. The method further includes: in the event of a failure of the main power supply, controlling the switch to connect the second power supply circuit and disconnect the first power supply circuit; and in the event of a normal main power supply, controlling the switch to connect the first power supply circuit and disconnect the second power supply circuit.

[0011] Optionally, the main fan ventilation unit further includes a UPS circuit and a UPS power supply. The UPS circuit includes a third power supply circuit and a fourth power supply circuit. One end of the third power supply circuit is electrically connected to the switch, and the other end of the fourth power supply circuit is electrically connected to the control cabinet. One end of the fourth power supply circuit is electrically connected to the UPS power supply, and the other end of the fourth power supply circuit is electrically connected to the control cabinet. The fourth power supply circuit includes a switch for controlling the on / off state of the fourth power supply circuit. The method further includes: controlling the switch to open when the third power supply circuit is supplying power normally; and controlling the switch to close when the third power supply circuit stops supplying power.

[0012] According to another aspect of the present invention, a switching device for a main fan is also provided. The main fan unit includes two main fans, a first damper, a second damper, a first door frame, a second door frame, a limiter, a first damper drive device, and a second damper drive device. The first damper drive device is connected to the first damper and is used to drive the first damper to move along the track of the first door frame. The second damper drive device is connected to the second damper and is used to drive the second damper to move along the track of the second door frame. The limiter is located on the side frame at one end of the track of the first door frame. The device includes: a first control unit for controlling the first damper drive device to drive the second damper to move along the track of the second door frame. The first damper is moved to the closed position, thereby sealing the first door frame. The first damper is the damper corresponding to the main fan in operation. The closed position is the position limited by the limit switch or the position reached by moving a predetermined distance from the first initial position. The first initial position is the position where the first damper does not obstruct the first door frame at all. The second control unit is used to control the second damper drive device to drive the second damper to the second initial position, thereby opening the second door frame. The second damper is the damper corresponding to the main fan that is not in operation. The second initial position is the position where the second damper does not obstruct the second door frame at all.

[0013] According to another aspect of the present invention, a computer-readable storage medium is also provided, the computer-readable storage medium including a stored program, wherein the program executes any one of the methods described.

[0014] According to another aspect of the present invention, a processor is also provided, the processor being configured to run a program, wherein the program, when running, executes any of the methods described.

[0015] According to another aspect of the present invention, a ventilation system is also provided, comprising: at least one main fan unit, one or more processors, a memory, a display device, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, and the one or more programs include methods for performing any one of the methods described.

[0016] In this embodiment of the invention, in the above-described method for switching the main fan, firstly, the first damper driving device is controlled to move the first damper to a closed position, so that the first damper seals the first door frame. The first damper is the damper corresponding to the running main fan. The closed position is the position limited by the limit switch or the position reached by moving a predetermined distance from the first initial position. The first initial position is the position where the first damper does not obstruct the first door frame at all. Then, the second damper driving device is controlled to move the second damper to a second initial position, so that the second damper opens the second door frame. The second damper is the damper corresponding to the non-running main fan. The second initial position is the position where the second damper does not obstruct the second door frame at all. This method, by driving the first damper to the position limited by the limit switch or moving a predetermined distance, achieves accurate movement to the closed position, avoiding the problem of airflow turbulence caused by the first damper only partially obstructing the first door frame after the second door frame is opened. This solves the problem of airflow turbulence caused by the main fan damper not being fully lifted in the prior art. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0018] Figure 1 A flowchart illustrating a method for switching a main fan according to an embodiment of this application is shown;

[0019] Figure 2 A schematic diagram of a damper winch according to an embodiment of this application is shown;

[0020] Figure 3 A schematic diagram of a portion of the power supply lines for an ATS and a UPS according to one embodiment of this application is shown;

[0021] Figure 4 A schematic diagram of a switching device for a main fan according to an embodiment of this application is shown.

[0022] The above figures include the following reference numerals:

[0023] 1. Damper winch; 2. Orifice plate; 3. Orifice plate timing device. Detailed Implementation

[0024] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0025] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0026] It should be understood that when an element (such as a layer, film, region, or substrate) is described as being "on" another element, the element may be directly on the other element, or there may be an intermediate element present. Furthermore, in the specification and claims, when an element is described as being "connected" to another element, the element may be "directly connected" to the other element, or "connected" to the other element via a third element.

[0027] As mentioned in the background section, in the prior art, the damper of the main fan is not raised properly, resulting in airflow turbulence. In order to solve the above problem, in a typical embodiment of this application, a method for switching the main fan, a switching device, a computer-readable storage medium, a processor, and a ventilation system are provided.

[0028] According to an embodiment of this application, a method for switching main fan ventilators is provided. The main fan ventilator unit includes two main fan ventilators, a first damper, a second damper, a first door frame, a second door frame, a limiter, a first damper drive device, and a second damper drive device. The first damper drive device is connected to the first damper and is used to drive the first damper to move along the track of the first door frame. The second damper drive device is connected to the second damper and is used to drive the second damper to move along the track of the second door frame. The limiter is located on the side frame at one end of the track of the first door frame.

[0029] Figure 1 This is a flowchart of a main fan switching method according to an embodiment of this application. Figure 1 As shown, the method includes the following steps:

[0030] Step S101: Control the first damper drive device to drive the first damper to the closed position, so that the first damper seals the first door frame. The first damper is the damper corresponding to the main fan in operation. The closed position is the position limited by the limiter or the position reached by moving a predetermined distance from the first initial position. The first initial position is the position where the first damper does not completely block the first door frame.

[0031] Step S102: Control the second damper drive device to drive the second damper to the second initial position, so that the second damper opens the second door frame. The second damper is the damper corresponding to the main fan that is not running. The second initial position is the position where the second damper does not completely block the second door frame.

[0032] In the aforementioned method for switching the main fan, firstly, the first damper drive device is controlled to move the first damper to the closed position, so that the first damper seals the first door frame. The first damper is the damper corresponding to the running main fan. The closed position is the position limited by the limit switch or the position reached by moving a predetermined distance from the first initial position. The first initial position is the position where the first damper does not obstruct the first door frame at all. Then, the second damper drive device is controlled to move the second damper to the second initial position, so that the second damper opens the second door frame. The second damper is the damper corresponding to the non-running main fan. The second initial position is the position where the second damper does not obstruct the second door frame at all. This method, by driving the first damper to the position limited by the limit switch or moving a predetermined distance, achieves accurate movement to the closed position, avoiding the problem of airflow turbulence caused by the first damper only partially obstructing the first door frame after the second door frame is opened. This solves the problem of airflow turbulence caused by the main fan damper not being fully raised in the prior art.

[0033] It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although a logical order is shown in the flowchart, in some cases the steps shown or described may be executed in a different order than that shown here.

[0034] In one optional embodiment of this application, the limiter includes a high limit sensor and a low limit sensor. The high limit sensor is located on the highest edge of the first door frame, and the low limit sensor is located on the lowest edge of the first door frame. The length direction of the track of the first door frame is vertical. Controlling the first damper drive device to drive the first damper to the closed position, so that the first damper blocks the door frame corresponding to the first damper, includes: controlling the first damper drive device to drive the first damper to move along the track of the first door frame; and controlling the first damper drive device to stop driving the first damper to move when both the high limit signal and the low limit signal are received simultaneously. The high limit signal is the signal generated by the high limit sensor detecting the first damper, and the low limit signal is the signal generated by the low limit sensor detecting the first damper. Specifically, the first air door drive device is controlled to move the first air door. When the first air door reaches the lowest edge of the first door frame, the low limit sensor generates a low limit signal. When the first air door reaches the highest edge of the first door frame, the high limit sensor generates a high limit signal. When both high and low limit signals are received simultaneously, it indicates that the upper edge of the first air door has reached the highest edge of the first door frame, and the lower edge of the first air door has reached the lowest edge of the first door frame. At this point, the first air door drive device can be controlled to stop moving the first air door, ensuring that the first air door seals the first door frame. Furthermore, the high and low limit sensors also have an alarm function. If the first air door is not raised to its designated position within a predetermined time, an alarm will be triggered. During the air door's raising, the system provides dual protection through high and low limit signal prompts, warnings, displays, and control. This achieves one-button intelligent lifting control for monitoring, surveillance, warnings, alarms, and automatic stopping of the air door raising process, ensuring safety throughout the entire raising process and guaranteeing the reliability of underground ventilation.

[0035] In one optional embodiment of this application, the first damper driving device includes a motor, an opening plate, and an opening plate timing device. The motor rotates to drive the opening plate to rotate at a constant speed. The opening plate timing device detects the rotation time of the opening plate and controls the first damper driving device to drive the first damper to a closed position, so that the first damper seals the door frame corresponding to the first damper. This includes: obtaining the detection time of the opening plate timing device, where the detection time is the product of a count and a predetermined time, and the count is the number of openings in the opening plate that have passed the detection position of the opening plate timing device; and when the detection time reaches the predetermined time, controlling the first damper driving device to stop driving the first damper to move. Specifically, as... Figure 2As shown, a perforated disc 2 is added to the reducer shaft of the damper winch 1, causing the motor of the damper winch 1 to rotate, driving the perforated disc 2 to rotate at a constant speed. A timing device 3 is installed at the hole of the disc. By setting the value of the damper lifting to the upper or lower limit position, the device compares and calculates the value with the timer sensor on the disc (hole) in real time. Once the damper lifts to the preset value, the limit is considered to be effective, allowing manual or automatic stopping of the damper device after it reaches the position. Together with the high and low limit sensors, this forms an anti-overshoot mechanism, forming a counting result of the winch damper during the lifting process and the upper limit sensor. The system intelligently identifies, automatically stops, and ultimately achieves intelligent start-stop functionality by intelligently recognizing and controlling various set values. Specifically, the preset values ​​for normal high and low lifting of the damper are set to 70 seconds, the preset value for abnormal lifting alarm is 75 seconds, and the preset value for emergency lifting stop is 78 seconds. If the detection time reaches the preset value of 75 seconds for abnormal lifting alarm, an alarm will be triggered, indicating a risk that the winch is lifting the damper too high, which could cause the wire rope to break, become entangled, or become jammed, or cause the climbing rope to break or roll back. If the detection time reaches the preset value of 78 seconds for emergency lifting stop, the lifting will be stopped directly to prevent the wire rope from breaking and causing a safety accident.

[0036] In an optional embodiment of this application, the main fan unit further includes a control cabinet, which is electrically connected to the main fan. Before controlling the first damper drive device to move the first damper to the closed position, the method further includes: acquiring monitoring information from the control cabinet, the monitoring information including the operating status information of the main fan, the operating status including normal status information and abnormal status information; and, upon receiving the abnormal status information of the operating main fan and the normal status information of the non-operating main fan, sending a switching command to the control cabinet, the switching command being used to control the first damper to seal the first door frame and control the second damper to open the second door frame. Specifically, the control cabinet is equipped with a Siemens 1500 PLC to monitor and control various status information of the main fan of the damper in real time. It is interlocked with the main control PLC of the fan. A 15-inch touch screen is installed on the cabinet door to display the fan status and switch cabinet information, which is convenient for on-site operators to operate and view. The display screen of the control cabinet can also realize one-button operation and real-time tracking and monitoring of automatic switching by the main fan operator. In one case, the main fan operator sends a switching command to the control cabinet with one button operation to switch to the main fan not running. In another case, if the main fan malfunctions during operation, a switching command is triggered to the control cabinet to switch to the main fan not running, realizing automatic switching. The control cabinet provides dual-circuit control for the damper winches of the first and second dampers, and also adds overload protection, operation action feedback and other information to make the winch control system more stable and reliable.

[0037] It should be noted that the control cabinet display screen can also realize one-button operation and real-time tracking and monitoring of automatic switching by the main fan operator. This reduces the original switching time of 6-9 minutes, or the need for multiple switching attempts due to operational abnormalities, to a one-time switching function and target of less than 4 minutes. This improves personnel efficiency, reduces safety risks, decreases the number of operators, and achieves cost reduction and efficiency improvement, laying the technical foundation for building an intelligent mine with "remote centralized control + unmanned operation + manned inspection".

[0038] In one optional embodiment of this application, the main fan ventilation unit further includes a main power supply, a backup power supply, and an ATS circuit. The ATS circuit includes a first power supply circuit, a second power supply circuit, and a switch. One end of the first power supply circuit is electrically connected to the main power supply, and the other end of the first power supply circuit is electrically connected to the switch. One end of the second power supply circuit is electrically connected to the backup power supply, and the other end of the second power supply circuit is electrically connected to the switch. The switch is electrically connected to at least a first damper drive device and a second damper drive device. The switch is used to switch between the first power supply circuit and the second power supply circuit. The method further includes: in the event of a main power supply failure, controlling the switch to connect the second power supply circuit and disconnect the first power supply circuit; and in the event of a normal main power supply, controlling the switch to connect the first power supply circuit and disconnect the second power supply circuit. Specifically, as shown... Figure 3 As shown, the ATS has two incoming lines: incoming line 1 connects to the primary power supply, and incoming line 2 connects to the backup power supply. When a power outage occurs on one of the incoming lines, the ATS immediately switches to the other power supply (1 primary, 1 backup). This is achieved through a switcher, allowing switching between the first and second power supply circuits to ensure power supply stability. In other words, when the primary power supply is normal and the function key is set to automatic mode, the backup circuit breaker opens and the primary circuit breaker closes to protect the primary power supply from connecting the load. When one or all three phases of the primary power supply A experience a voltage interruption, the ATS switches the load from the primary power supply to the backup power supply (when the backup power supply has normal voltage), and switches back to the primary power supply when the primary power supply returns to normal.

[0039] In one optional embodiment of this application, the main fan ventilation unit further includes a UPS circuit and a UPS power supply. The UPS circuit includes a third power supply circuit and a fourth power supply circuit. One end of the third power supply circuit is electrically connected to the switch, and the other end of the fourth power supply circuit is electrically connected to the control cabinet. One end of the fourth power supply circuit is electrically connected to the UPS power supply, and the other end of the fourth power supply circuit is electrically connected to the control cabinet. The fourth power supply circuit includes a switch for controlling the on / off state of the fourth power supply circuit. The method further includes: controlling the switch to open when the third power supply circuit is supplying power normally; and controlling the switch to close when the third power supply circuit stops supplying power. Specifically, the third power supply circuit is connected to the switch and supplies power to the control cabinet through the main power supply or the backup power supply. During the switching process, the third power supply circuit stops supplying power and controls the switch of the fourth power supply circuit to close, supplying power to the control cabinet through the UPS power supply to ensure the continuity of power supply to the control cabinet. The UPS is mainly responsible for providing uninterrupted power to the control system at the moment of power switching. A single ATS power supply will be interrupted, and a single UPS power supply time will be limited. However, the ATS+UPS mode can reliably switch between the two power supplies to maintain the continuity, reliability and safety of power supply.

[0040] It should be noted that the aforementioned switch consists of two three- or four-pole molded case circuit breakers and their accessories (auxiliary and alarm contacts), a mechanical interlocking transmission mechanism, and an intelligent controller. It is available in two structures: integrated and split. In the integrated type, the controller and actuator are mounted on the same base; in the split type, the controller is mounted on the cabinet panel, and the actuator is mounted on the base for user installation inside the cabinet. The controller and actuator are connected by a cable approximately 2 meters long. Its key feature is a reliable mechanical and electrical interlocking protection between the two circuit breakers, completely eliminating the possibility of both circuit breakers closing simultaneously. The intelligent controller uses a microcontroller as its control core, featuring simple hardware, powerful functions, convenient expansion, and high reliability. It has short-circuit and overload protection functions, automatic switching functions for overvoltage, undervoltage, and phase loss, and intelligent alarm functions. The automatic switching parameters can be freely set externally, and it also has intelligent protection functions for the operating motor.

[0041] In addition, the main fan ventilation unit also has a fire control circuit. When the fire control center sends a control signal to the intelligent controller, both circuit breakers will be tripped, and both main fan ventilation units will be de-energized to reduce the probability of fire.

[0042] This application embodiment also provides a main fan switching device. It should be noted that the main fan switching device of this application embodiment can be used to execute the main fan switching method provided in this application embodiment. The following describes the main fan switching device provided in this application embodiment. The main fan unit includes two main fans, a first damper, a second damper, a first door frame, a second door frame, a limiter, a first damper drive device, and a second damper drive device. The first damper drive device is connected to the first damper and is used to drive the first damper to move along the track of the first door frame. The second damper drive device is connected to the second damper and is used to drive the second damper to move along the track of the second door frame. The limiter is located on the side frame at one end of the track of the first door frame.

[0043] Figure 4 This is a schematic diagram of a switching device for the main fan according to an embodiment of this application. Figure 4 As shown, the device includes:

[0044] The first control unit 10 is used to control the first damper drive device to drive the first damper to move to the closed position, so that the first damper blocks the first door frame. The first damper is the damper corresponding to the main fan in operation. The closed position is the position limited by the limiter or the position reached by moving a predetermined distance from the first initial position. The first initial position is the position where the first damper does not block the first door frame at all.

[0045] The second control unit 20 is used to control the second damper drive device to drive the second damper to move to the second initial position, so that the second damper opens the second door frame. The second damper is the damper corresponding to the main fan that is not running. The second initial position is the position where the second damper does not completely block the second door frame.

[0046] In the aforementioned main fan switching device, a first control unit controls the first damper drive device to move the first damper to a closed position, causing the first damper to seal the first door frame. The first damper corresponds to the damper of the operating main fan. The closed position is either the position defined by the limit switch or the position reached by moving a predetermined distance from the first initial position. The first initial position is the position where the first damper does not obstruct the first door frame at all. A second control unit controls the second damper drive device to move the second damper to a second initial position, causing the second damper to open the second door frame. The second damper corresponds to the damper of the non-operating main fan. The second initial position is the position where the second damper does not obstruct the second door frame at all. This device, by driving the first damper to the position defined by the limit switch or moving a predetermined distance, achieves accurate movement to the closed position, avoiding the problem of airflow turbulence caused by the first damper only partially obstructing the first door frame after the second door frame is opened. This solves the problem of airflow turbulence caused by the main fan damper not being fully lifted in the prior art.

[0047] In one optional embodiment of this application, the limiter includes a high limit sensor and a low limit sensor. The high limit sensor is located on the highest edge of the first door frame, and the low limit sensor is located on the lowest edge of the first door frame. The length direction of the track of the first door frame is vertical. The first control unit includes a first control module and a second control module. The first control module is used to control the first damper drive device to drive the first damper to move along the track of the first door frame. The second control module is used to control the first damper drive device to stop driving the first damper to move when both the high limit signal and the low limit signal are received simultaneously. The high limit signal is the signal generated by the high limit sensor detecting the first damper, and the low limit signal is the signal generated by the low limit sensor detecting the first damper. Specifically, the first air door drive device is controlled to move the first air door. When the first air door reaches the lowest edge of the first door frame, the low limit sensor generates a low limit signal. When the first air door reaches the highest edge of the first door frame, the high limit sensor generates a high limit signal. When both high and low limit signals are received simultaneously, it indicates that the upper edge of the first air door has reached the highest edge of the first door frame, and the lower edge of the first air door has reached the lowest edge of the first door frame. At this point, the first air door drive device can be controlled to stop moving the first air door, ensuring that the first air door seals the first door frame. Furthermore, the high and low limit sensors also have an alarm function. If the first air door is not raised to its designated position within a predetermined time, an alarm will be triggered. During the air door's raising, the system provides dual protection through high and low limit signal prompts, warnings, displays, and control. This achieves one-button intelligent lifting control for monitoring, surveillance, warnings, alarms, and automatic stopping of the air door raising process, ensuring safety throughout the entire raising process and guaranteeing the reliability of underground ventilation.

[0048] In one optional embodiment of this application, the first damper drive device includes a motor, an orifice plate, and an orifice plate timing device. The motor rotates to drive the orifice plate to rotate at a constant speed. The orifice plate timing device detects the rotation time of the orifice plate. The first control unit includes a first acquisition module and a third control module. The first acquisition module is used to acquire the detection time of the orifice plate timing device. The detection time is the product of a count and a predetermined time. The count is the number of holes in the orifice plate that have passed the detection position of the orifice plate timing device. The third control module is used to control the first damper drive device to stop driving the first damper to move when the detection time reaches the predetermined time. Specifically, as shown... Figure 2As shown, a perforated disc 2 is added to the reducer shaft of the damper winch 1, causing the motor of the damper winch 1 to rotate, driving the perforated disc 2 to rotate at a constant speed. A timing device 3 is installed at the hole of the disc. By setting the value of the damper lifting to the upper or lower limit position, the device compares and calculates the value with the timer sensor on the disc (hole) in real time. Once the damper lifts to the preset value, the limit is considered to be effective, allowing manual or automatic stopping of the damper device after it reaches the position. Together with the high and low limit sensors, this forms an anti-overshoot mechanism, forming a counting result of the winch damper during the lifting process and the upper limit sensor. The system intelligently identifies, automatically stops, and ultimately achieves intelligent start-stop functionality by intelligently recognizing and controlling various set values. Specifically, the preset values ​​for normal high and low lifting of the damper are set to 70 seconds, the preset value for abnormal lifting alarm is 75 seconds, and the preset value for emergency lifting stop is 78 seconds. If the detection time reaches the preset value of 75 seconds for abnormal lifting alarm, an alarm will be triggered, indicating a risk that the winch is lifting the damper too high, which could cause the wire rope to break, become entangled, or become jammed, or cause the climbing rope to break or roll back. If the detection time reaches the preset value of 78 seconds for emergency lifting stop, the lifting will be stopped directly to prevent the wire rope from breaking and causing a safety accident.

[0049] In one optional embodiment of this application, the main fan unit further includes a control cabinet, which is electrically connected to the main fan at least once. The device further includes a third control unit, which includes a second acquisition module and a transmission module. The second acquisition module is used to acquire monitoring information of the control cabinet before controlling the first damper drive device to move the first damper to the closed position. The monitoring information includes the operating status information of the main fan, which includes normal status information and abnormal status information. The transmission module is used to send a switching command to the control cabinet when it receives the abnormal status information of the main fan in operation and the normal status information of the main fan not in operation. The switching command is used to control the first damper to seal the first door frame and control the second damper to open the second door frame. Specifically, the control cabinet is equipped with a Siemens 1500 PLC to monitor and control various status information of the main fan of the damper in real time. It is interlocked with the main control PLC of the fan. A 15-inch touch screen is installed on the cabinet door to display the fan status and switch cabinet information, which is convenient for on-site operators to operate and view. The display screen of the control cabinet can also realize one-button operation and real-time tracking and monitoring of automatic switching by the main fan operator. In one case, the main fan operator sends a switching command to the control cabinet with one button operation to switch to the main fan not running. In another case, if the main fan malfunctions during operation, a switching command is triggered to the control cabinet to switch to the main fan not running, realizing automatic switching. The control cabinet provides dual-circuit control for the damper winches of the first and second dampers, and also adds overload protection, operation action feedback and other information to make the winch control system more stable and reliable.

[0050] It should be noted that the control cabinet display screen can also realize one-button operation and real-time tracking and monitoring of automatic switching by the main fan operator. This reduces the original switching time of 6-9 minutes, or the need for multiple switching attempts due to operational abnormalities, to a one-time switching function and target of less than 4 minutes. This improves personnel efficiency, reduces safety risks, decreases the number of operators, and achieves cost reduction and efficiency improvement, laying the technical foundation for building an intelligent mine with "remote centralized control + unmanned operation + manned inspection".

[0051] In one optional embodiment of this application, the main fan ventilation unit further includes a main power supply, a backup power supply, and an ATS circuit. The ATS circuit includes a first power supply circuit, a second power supply circuit, and a switch. One end of the first power supply circuit is electrically connected to the main power supply, and the other end of the first power supply circuit is electrically connected to the switch. One end of the second power supply circuit is electrically connected to the backup power supply, and the other end of the second power supply circuit is electrically connected to the switch. The switch is at least electrically connected to a first damper drive device and a second damper drive device. The switch is used to switch between the first power supply circuit and the second power supply circuit. The device further includes a switching unit, which includes a first switching module and a second switching module. The first switching module is used to control the switch to connect the second power supply circuit and disconnect the first power supply circuit in the event of a main power supply failure. The second switching module is used to control the switch to connect the first power supply circuit and disconnect the second power supply circuit when the main power supply is normal. Specifically, as shown... Figure 3 As shown, the ATS has two incoming lines: incoming line 1 connects to the primary power supply, and incoming line 2 connects to the backup power supply. When a power outage occurs on one of the incoming lines, the ATS immediately switches to the other power supply (1 primary, 1 backup). This is achieved through a switcher, allowing switching between the first and second power supply circuits to ensure power supply stability. In other words, when the primary power supply is normal and the function key is set to automatic mode, the backup circuit breaker opens and the primary circuit breaker closes to protect the primary power supply from connecting the load. When one or all three phases of the primary power supply A experience a voltage interruption, the ATS switches the load from the primary power supply to the backup power supply (when the backup power supply has normal voltage), and switches back to the primary power supply when the primary power supply returns to normal.

[0052] In one optional embodiment of this application, the main fan ventilation unit further includes a UPS circuit and a UPS power supply. The UPS circuit includes a third power supply circuit and a fourth power supply circuit. One end of the third power supply circuit is electrically connected to the switch, and the other end of the fourth power supply circuit is electrically connected to the control cabinet. One end of the fourth power supply circuit is electrically connected to the UPS power supply, and the other end of the fourth power supply circuit is electrically connected to the control cabinet. The fourth power supply circuit includes a switch for controlling the on / off state of the fourth power supply circuit. The device further includes a fourth control unit, which includes a fourth control module and a fifth control module. The fourth control module controls the switch to open when the third power supply circuit is supplying power normally, and the fifth control module controls the switch to close when the third power supply circuit stops supplying power. Specifically, the third power supply circuit is connected to the switch and supplies power to the control cabinet through the main power supply or the backup power supply. During the switching process, the third power supply circuit stops supplying power and controls the switch of the fourth power supply circuit to close, supplying power to the control cabinet through the UPS power supply to ensure the continuity of power supply to the control cabinet. The UPS is mainly responsible for providing uninterrupted power to the control system at the moment of power switching. A single ATS power supply will be interrupted, and a single UPS power supply time will be limited. However, the ATS+UPS mode can reliably switch between the two power supplies to maintain the continuity, reliability and safety of power supply.

[0053] It should be noted that the aforementioned switch consists of two three- or four-pole molded case circuit breakers and their accessories (auxiliary and alarm contacts), a mechanical interlocking transmission mechanism, and an intelligent controller. It is available in two structures: integrated and split. In the integrated type, the controller and actuator are mounted on the same base; in the split type, the controller is mounted on the cabinet panel, and the actuator is mounted on the base for user installation inside the cabinet. The controller and actuator are connected by a cable approximately 2 meters long. Its key feature is a reliable mechanical and electrical interlocking protection between the two circuit breakers, completely eliminating the possibility of both circuit breakers closing simultaneously. The intelligent controller uses a microcontroller as its control core, featuring simple hardware, powerful functions, convenient expansion, and high reliability. It has short-circuit and overload protection functions, automatic switching functions for overvoltage, undervoltage, and phase loss, and intelligent alarm functions. The automatic switching parameters can be freely set externally, and it also has intelligent protection functions for the operating motor.

[0054] In addition, the main fan ventilation unit also has a fire control circuit. When the fire control center sends a control signal to the intelligent controller, both circuit breakers will be tripped, and both main fan ventilation units will be de-energized to reduce the probability of fire.

[0055] This application also provides a ventilation system, including: at least one main fan unit, one or more processors, a memory, a display device, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, and the one or more programs include methods for performing the above.

[0056] The aforementioned ventilation system includes at least one main fan unit, one or more processors, a memory, a display device, and one or more programs. The processor controls the main fan unit to execute the aforementioned main fan switching method. By driving the first damper to move to the position limited by the limiter or moving a predetermined distance, it achieves accurate movement to the closed position, avoiding the problem of airflow turbulence caused by the first damper only partially blocking the first door frame after the second door frame is opened. This solves the problem of airflow turbulence caused by the main fan damper not being lifted to the correct position in the prior art.

[0057] The aforementioned main fan switching method includes a processor and a memory. The first control unit and the second control unit are stored in the memory as program units, and the processor executes the program units stored in the memory to achieve the corresponding functions.

[0058] The processor contains a kernel, which retrieves the corresponding program unit from memory. One or more kernels can be configured, and adjusting kernel parameters can solve the problem of turbulent airflow caused by the main fan damper not lifting properly in existing technologies.

[0059] The memory may include non-permanent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM, and the memory includes at least one memory chip.

[0060] This invention provides a computer-readable storage medium having a program stored thereon, which, when executed by a processor, implements the above-described method.

[0061] This invention provides a processor for running a program, wherein the program executes the method described above when it runs.

[0062] This invention provides a device including a processor, a memory, and a program stored in the memory and executable on the processor. When the processor executes the program, it performs at least the following steps:

[0063] Step S101: Control the first damper drive device to drive the first damper to the closed position, so that the first damper seals the first door frame. The first damper is the damper corresponding to the main fan in operation. The closed position is the position limited by the limiter or the position reached by moving a predetermined distance from the first initial position. The first initial position is the position where the first damper does not completely block the first door frame.

[0064] Step S102: Control the second damper drive device to drive the second damper to the second initial position, so that the second damper opens the second door frame. The second damper is the damper corresponding to the main fan that is not running. The second initial position is the position where the second damper does not completely block the second door frame.

[0065] The devices mentioned in this article can be servers, PCs, tablets, mobile phones, etc.

[0066] This application also provides a computer program product, which, when executed on a data processing device, is suitable for executing an initialization program having at least the following method steps:

[0067] Step S101: Control the first damper drive device to drive the first damper to the closed position, so that the first damper seals the first door frame. The first damper is the damper corresponding to the main fan in operation. The closed position is the position limited by the limiter or the position reached by moving a predetermined distance from the first initial position. The first initial position is the position where the first damper does not completely block the first door frame.

[0068] Step S102: Control the second damper drive device to drive the second damper to the second initial position, so that the second damper opens the second door frame. The second damper is the damper corresponding to the main fan that is not running. The second initial position is the position where the second damper does not completely block the second door frame.

[0069] In the above embodiments of the present invention, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0070] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units described above can be a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.

[0071] The units described above as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0072] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0073] If the aforementioned integrated units are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a computer-readable storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned computer-readable storage medium includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0074] As can be seen from the above description, the embodiments of this application achieve the following technical effects:

[0075] 1) In the main fan switching method of this application, firstly, the first damper driving device is controlled to move the first damper to the closed position, so that the first damper seals the first door frame. The first damper is the damper corresponding to the running main fan. The closed position is the position limited by the limiter or the position reached by moving a predetermined distance from the first initial position. The first initial position is the position where the first damper does not obstruct the first door frame at all. Then, the second damper driving device is controlled to move the second damper to the second initial position, so that the second damper opens the second door frame. The second damper is the damper corresponding to the non-running main fan. The second initial position is the position where the second damper does not obstruct the second door frame at all. This method achieves accurate movement to the closed position by driving the first damper to the position limited by the limiter or moving a predetermined distance, avoiding the problem of airflow turbulence caused by the first damper only partially obstructing the first door frame after the second door frame is opened. That is, it solves the problem of airflow turbulence caused by the main fan damper not being lifted to the correct position in the prior art.

[0076] 2) In the main fan switching device of this application, the first control unit controls the first damper driving device to move the first damper to the closed position, so that the first damper seals the first door frame. The first damper is the damper corresponding to the main fan in operation. The closed position is the position limited by the limiter or the position reached by moving a predetermined distance from the first initial position. The first initial position is the position where the first damper does not obstruct the first door frame at all. The second control unit controls the second damper driving device to move the second damper to the second initial position, so that the second damper opens the second door frame. The second damper is the damper corresponding to the main fan that is not in operation. The second initial position is the position where the second damper does not obstruct the second door frame at all. This device achieves accurate movement to the closed position by driving the first damper to the position limited by the limiter or moving a predetermined distance, avoiding the problem of airflow turbulence caused by the first damper only partially obstructing the first door frame after the second door frame is opened. That is, it solves the problem of airflow turbulence caused by the main fan damper not being lifted to the correct position in the prior art.

[0077] 3) The ventilation system of this application includes at least one main fan ventilation unit, one or more processors, a memory, a display device, and one or more programs. The processor controls the main fan ventilation unit to execute the above-mentioned main fan ventilation switching method. By driving the first damper to move to the position limited by the limiter or to move a predetermined distance, it achieves accurate movement to the closed position, avoiding the problem that the first damper only partially blocks the first door frame after the second door frame is opened, which leads to airflow turbulence. That is, it solves the problem of airflow turbulence caused by the main fan ventilation damper not being lifted to the correct position in the prior art.

[0078] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A method of switching primary fan ventilators, characterized in that, The main fan ventilation unit comprises two main fan ventilators, a first air door, a second air door, a first door frame, a second door frame, a position limiter, a first air door driving device and a second air door driving device, the first air door driving device is connected with the first air door and is used to drive the first air door to move along the track of the first door frame, the second air door driving device is connected with the second air door and is used to drive the second air door to move along the track of the second door frame, the position limiter is located on the frame at one end of the track of the first door frame, and the method comprises the following steps: controlling the first air door driving device to drive the first air door to move to a closed position, so that the first air door seals the first door frame, the first air door is the air door corresponding to the main fan ventilator in operation, and the closed position is a position defined by the position limiter or a position reached by moving a predetermined distance from a first initial position, wherein the first initial position is a position in which the first air door does not completely block the first door frame; controlling the second air door driving device to drive the second air door to move to a second initial position, so that the second air door opens the second door frame, the second air door is the air door corresponding to the main fan ventilator which is not in operation, and the second initial position is a position in which the second air door does not completely block the second door frame, the position limiter comprises a high-limit sensor and a low-limit sensor, the high-limit sensor is located on the frame with the highest height of the first door frame, the low-limit sensor is located on the frame with the lowest height of the first door frame, the length direction of the track of the first door frame is a vertical direction, and controlling the first air door driving device to drive the first air door to move to a closed position, so that the first air door seals the door frame corresponding to the first air door, comprises: controlling the first air door driving device to drive the first air door to move along the track of the first door frame; in the case that a high-limit signal and a low-limit signal are received at the same time, controlling the first air door driving device to stop driving the first air door to move, the high-limit signal is a signal generated by the first air door detected by the high-limit sensor, and the low-limit signal is a signal generated by the first air door detected by the low-limit sensor.

2. The method of claim 1, wherein, The first air door driving device comprises a motor, a perforated disc and a disc timing device, the motor rotates to drive the perforated disc to rotate at a constant speed, and the disc timing device detects the rotation time of the perforated disc, and controlling the first air door driving device to drive the first air door to move to a closed position, so that the first air door seals the door frame corresponding to the first air door, comprises: obtaining the detection time of the disc timing device, the detection time is the product of the count number and the predetermined time, and the count number is the number of holes of the perforated disc passing through the detection position of the disc timing device; in the case that the detection time reaches the predetermined time, controlling the first air door driving device to stop driving the first air door to move.

3. The method according to claim 1 or 2, characterized in that, The main fan ventilation unit also includes a control cabinet, and the control cabinet is electrically connected with the main fan ventilation unit. The method further includes the following steps: Obtaining monitoring information of the control cabinet, wherein the monitoring information includes running state information of the main fan ventilation unit, and the running state information includes normal state information and abnormal state information; 4. The method of claim 3, wherein, In the case of receiving the abnormal state information of the main fan ventilation unit in operation and receiving the normal state information of the main fan ventilation unit not in operation, sending a switching instruction to the control cabinet, wherein the switching instruction is used to control the first door to close the first door frame and control the second door to open the second door frame. The main fan ventilation unit also includes a normal power supply, a backup power supply, and an ATS circuit, wherein the ATS circuit includes a first power supply circuit, a second power supply circuit, and a switcher, one end of the first power supply circuit is electrically connected with the normal power supply, the other end of the first power supply circuit is electrically connected with the switcher, one end of the second power supply circuit is electrically connected with the backup power supply, the other end of the second power supply circuit is electrically connected with the switcher, and the switcher is electrically connected with the first door drive device and the second door drive device, wherein the switcher is used to switch between the first power supply circuit and the second power supply circuit, and the method further includes the following steps: In the case of failure of the normal power supply, controlling the switcher to connect the second power supply circuit and disconnect the first power supply circuit; 5. The method of claim 4, wherein, In the case of normal operation of the normal power supply, controlling the switcher to connect the first power supply circuit and disconnect the second power supply circuit. The main fan ventilation unit also includes a UPS circuit and a UPS power supply, wherein the UPS circuit includes a third power supply circuit and a fourth power supply circuit, one end of the third power supply circuit is electrically connected with the switcher, the other end of the fourth power supply circuit is electrically connected with the control cabinet, one end of the fourth power supply circuit is electrically connected with the UPS power supply, and the other end of the fourth power supply circuit is electrically connected with the control cabinet, and the fourth power supply circuit includes a switch, wherein the switch is used to control the fourth power supply circuit to be connected or disconnected, and the method further includes the following steps: In the case of normal power supply of the third power supply circuit, controlling the switch to be disconnected; 6. A switching device for a primary fan ventilator, characterized in that In the case of stop of power supply of the third power supply circuit, controlling the switch to be connected. The main fan ventilation unit includes two main fan ventilation units, a first door, a second door, a first door frame, a second door frame, a stopper, a first door drive device, and a second door drive device, wherein the first door drive device is connected with the first door and is used to drive the first door to move along the track of the first door frame, the second door drive device is connected with the second door and is used to drive the second door to move along the track of the second door frame, and the stopper is located on the frame at one end of the track of the first door frame, and the device includes The first control unit is configured to control the first damper driving device to drive the first damper to move to a closed position, so that the first damper seals the first door frame, the first damper is a damper corresponding to the main fan ventilator in operation, the closed position is a position defined by the limit stopper or a position reached by moving a predetermined distance from a first initial position, and the first initial position is a position in which the first damper does not block the first door frame at all. The second control unit is configured to control the second damper driving device to drive the second damper to move to a second initial position, so that the second damper opens the second door frame, the second damper is a damper corresponding to the main fan ventilator that is not in operation, and the second initial position is a position in which the second damper does not block the second door frame at all. The limit stopper includes a high-limit stop sensor and a low-limit stop sensor, the high-limit stop sensor is located on a highest edge frame of the first door frame, the low-limit stop sensor is located on a lowest edge frame of the first door frame, a length direction of a track of the first door frame is a vertical direction, the first control unit includes a first control module and a second control module, the first control module is configured to control the first damper driving device to drive the first damper to move along the track of the first door frame, and the second control module is configured to control the first damper driving device to stop driving the first damper to move when a high-limit stop signal and a low-limit stop signal are received simultaneously, the high-limit stop signal is a signal detected by the high-limit stop sensor and generated by the first damper, and the low-limit stop signal is a signal detected by the low-limit stop sensor and generated by the first damper.

7. A computer readable storage medium characterized in that, The computer readable storage medium includes a stored program, and the program performs the method in any one of claims 1 to 5.

8. A processor, comprising: The processor is configured to run a program, and the program performs the method in any one of claims 1 to 5 when running.

9. A ventilation system, characterized in that The computer readable storage medium includes a stored program, and the program performs the method in any one of claims 1 to 5. The computer readable storage medium includes a stored program, and the program performs the method in any one of claims 1 to 5.

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