Air door electromagnetic locking device

Abstract

The utility model discloses an electromagnetic locking device for an air door. The electromagnetic locking device comprises a hardware function module unit, a central control unit, a wireless transceiving transmission system, a working power supply and a shell, the hardware function module unit comprises a reed switch magnetic proximity switch, an electromagnetic explosion-proof magnetic lock and an audible and visual alarm; the central control unit takes an STC12 single-chip micro-processing system as a core and is matched with an onboard MOSFET (Metal-Oxide-Semiconductor Field Effect Transistor); the wireless transceiving transmission system is based on a Lora technology, the working frequency is 410-525MHz, and a differential bus communication mode is adopted; the working power supply is an intrinsic safety explosion-proof power supply of 127V AC-12VDC, the shell is an explosion-proof box, wires of the electromagnetic explosion-proof magnetic lock, the audible and visual alarm and the reed switch magnetic proximity switch are connected into the explosion-proof box, and an antenna of the wireless transmission module is externally arranged and fixed in the explosion-proof box. The system has the advantages of high safety, strong reliability, good practicability and high intelligent degree, and can effectively guarantee the ventilation safety of the coal mine and improve the management efficiency.

Description

Electromagnetic interlocking device for dampers Technical Field

[0001] This utility model relates to the technical field of ventilation safety equipment in coal mines, and in particular to an electromagnetic interlocking device for ventilation doors. Background Technology

[0002] In underground coal mining, ventilation systems are crucial for safe production. Air dampers, as key ventilation facilities, are responsible for controlling airflow and volume, ensuring normal underground ventilation, and preventing the accumulation of harmful gases and short-circuiting of airflow.

[0003] However, the operation of underground ventilation doors in coal mines currently presents significant problems. According to the "Coal Mine Safety Regulations," main ventilation doors should be equipped with switch sensors, and an alarm should sound when both doors are opened simultaneously. In practice, even with dedicated personnel monitoring them, the alarm sounding from both ventilation doors cannot be completely prevented when personnel pass through frequently.

[0004] Some coal mines have complex ventilation conditions, with parallel intake and return airflow, numerous structures, and high resistance. Over time, existing building pillars are prone to damage, leading to complex air leakage issues. Double-opening air dampers can easily cause airflow short-circuiting, resulting in localized areas with little or no airflow, affecting the ventilation system. Moreover, in sparsely populated work areas, air damper alarms are difficult to handle promptly, and continuous alarms threaten safe production.

[0005] Existing wire rope soft interlocking methods have obvious problems: they are impractical, fail to prevent airflow short circuits, and their interlocking effect cannot meet safety production requirements. Double-opening dampers not only affect airflow supply but may also lead to increased concentrations of toxic and harmful gases, potentially causing serious accidents.

[0006] Therefore, it is urgent to develop practical and reliable underground ventilation door interlocking devices for coal mines, which are of great significance for ensuring safe production in coal mines and improving the stability of ventilation systems. Summary of the Invention

[0007] The purpose of this invention is to address the shortcomings of existing technologies by proposing an electromagnetic interlocking device for dampers.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] The electromagnetic interlocking device for the damper includes a hardware functional module unit, a central control unit, a wireless transceiver system, a power supply, and a housing. The hardware functional module unit includes a reed magnetic proximity switch, an electromagnetic explosion-proof magnetic lock, and an audible and visual alarm. The central control unit is based on an STC12 single-chip microprocessor system and equipped with onboard MOSFETs. The wireless transceiver system is based on LoRa technology, operates at a frequency of 410-525MHz, and uses differential bus communication. The power supply is an intrinsically safe explosion-proof power supply of 127V AC-12V DC. The housing is an explosion-proof box, and the wiring of the electromagnetic explosion-proof magnetic lock, audible and visual alarm, and reed magnetic proximity switch is connected to the explosion-proof box. The antenna of the wireless transmission module is external and fixed to the explosion-proof box.

[0010] Preferably, the reed magnetic proximity switch is used to detect the opening and closing status of the damper and provide real-time status information to the central control unit; the electromagnetic explosion-proof magnetic lock is used to control the opening and closing of the damper; and the audible and visual alarm is used to issue an alarm in abnormal circumstances to remind staff.

[0011] Preferably, the electromagnetic explosion-proof magnetic lock is equipped with two working modes: series and parallel coil connection. The push-pull signal is output by the microcontroller control unit and the magnetic attraction is achieved by driving the switching circuit through the field-effect transistor. The working power consumption is provided by the onboard power supply. This setting can flexibly adjust the working state of the magnetic lock according to the actual working conditions.

[0012] Preferably, the input and output signals of the central control unit are electrically isolated through optocoupler isolation technology to improve the device's anti-interference capability.

[0013] Preferably, the wireless transceiver system communicates with the central control unit and the lower-level wireless communication device via a differential bus to ensure accurate and reliable data transmission.

[0014] Preferably, the central control unit stores a C language control program developed based on the Keil environment, which is used to perform power-on initialization, data acquisition, and logic decision-making. The program is then downloaded to the controller via a serial port to realize intelligent control of the device.

[0015] The beneficial effects of this utility model are:

[0016] 1. The device adopts an intrinsically safe explosion-proof power supply and explosion-proof enclosure design, ensuring safe operation in the flammable and explosive environment of underground coal mines from both power supply and enclosure perspectives. Simultaneously, the audible and visual alarm can promptly issue warning signals, effectively preventing safety accidents such as airflow short circuits and harmful gas accumulation caused by abnormal opening of air dampers, thus protecting the lives of coal mine workers.

[0017] 2. The central control unit employs optocoupler isolation technology, enhancing the device's anti-interference capability. The wireless transceiver system, based on LoRa technology and differential bus communication, ensures the accuracy and reliability of data transmission. The electromagnetic explosion-proof magnetic lock features both series and parallel coil operation modes, allowing for flexible adjustment according to actual needs, further improving the device's reliability.

[0018] 3. The reed magnetic proximity switch can accurately detect the opening and closing status of the damper, and the electromagnetic explosion-proof magnetic lock can effectively control the opening and closing of the damper, avoiding the poor practicality of the traditional wire rope soft locking method. Meanwhile, the device's software system is developed using the Keil environment, with code written in C language. The program flow is clear, easy to maintain and upgrade, improving the device's practicality.

[0019] 4. The central control unit can automatically collect, process, and analyze data, and make judgments and controls according to logical rules, realizing the intelligent operation of the device. The wireless transceiver system enables remote data transmission and monitoring, facilitating real-time management and control of the device by staff and improving the management efficiency of the coal mine ventilation system. Attached Figure Description

[0020] Figure 1 is a system block diagram of the electromagnetic interlocking device for the damper;

[0021] Figure 2 is the left half of the system block diagram in Figure 1;

[0022] Figure 3 is the right half of the system block diagram in Figure 1;

[0023] Figure 4 is the upper part of the system block diagram in Figure 1. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0025] Referring to Figure 1, the hardware functional module unit is a crucial part of the entire device's interaction with the external environment, including a reed magnetic proximity switch, an electromagnetic explosion-proof magnetic lock, and an audible and visual alarm. The reed magnetic proximity switch, based on the principle of magnetic field induction, converts changes in the damper's position into an electrical signal; the electromagnetic explosion-proof magnetic lock has explosion-proof functionality, using an electromagnetic coil energized to generate magnetic force to lock the damper; the audible and visual alarm emits audible and visual signals in abnormal situations (such as when both dampers are opened simultaneously).

[0026] The central control unit is based on the STC12 single-chip microprocessor system, paired with onboard MOSFETs. The STC12 system processes sensor data and issues commands, while the onboard MOSFET control circuit switches on and off to power the actuators. Optical isolation technology is used for electrical isolation, improving interference immunity.

[0027] The wireless transceiver system is based on LoRa technology, operates at a frequency of 410-525MHz, and uses differential bus communication. LoRa technology is suitable for the complex environment of coal mines, and differential bus communication ensures accurate data transmission. This system exchanges data with the central control unit and lower-level wireless communication devices.

[0028] The operating power supply uses an intrinsically safe explosion-proof power supply of 127V AC-12V DC to provide stable power to the device. The outer casing is an explosion-proof box to protect the internal circuitry. The wiring for the electromagnetic explosion-proof magnetic lock, audible and visual alarm, and reed magnetic proximity switch is connected to the explosion-proof box. The antenna of the wireless transmission module is externally mounted and fixed to the explosion-proof box to ensure good reception and transmission of wireless signals.

[0029] Working Principle: After the device is powered on, the central control unit initializes and performs a self-test. The reed magnetic proximity switch detects the status of the damper in real time and transmits the data to the central control unit, which analyzes and judges the information. If normal, the current status is maintained; if abnormal (such as both dampers being open simultaneously), a push-pull signal is output to control the electromagnetic explosion-proof magnetic lock to close the damper, and an audible and visual alarm is triggered. Simultaneously, the central control unit communicates with the lower-level machine via a wireless transceiver system to achieve remote monitoring and control.

[0030] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An electromagnetic interlocking device for a damper, characterized in that, The device includes hardware functional module units, a central control unit, a wireless transceiver system, and a power supply and housing. The hardware functional module units include a reed magnetic proximity switch, an electromagnetic explosion-proof magnetic lock, and an audible and visual alarm. The central control unit is based on an STC12 single-chip microprocessor system and equipped with onboard MOSFETs. The wireless transceiver system is based on LoRa technology, operates at a frequency of 410-525MHz, and uses differential bus communication. The power supply is an intrinsically safe explosion-proof power supply of 127V AC-12VDC. The housing is an explosion-proof box, and the wiring for the electromagnetic explosion-proof magnetic lock, audible and visual alarm, and reed magnetic proximity switch is connected to the explosion-proof box. The antenna of the wireless transmission module is external and fixed to the explosion-proof box.

2. The electromagnetic interlocking device for the damper according to claim 1, characterized in that, The reed magnetic proximity switch is used to detect the opening and closing status of the damper and provide real-time status information to the central control unit. The electromagnetic explosion-proof magnetic lock is used to control the opening and closing of the damper. The audible and visual alarm is used to issue an alarm in abnormal situations to remind staff.

3. The electromagnetic interlocking device for the damper according to claim 1, characterized in that: The electromagnetic explosion-proof magnetic lock has two working modes: series and parallel coil connection. The push-pull signal is output by the microcontroller control unit, and the magnetic attraction is achieved by driving the switching circuit through the field effect transistor. The working power is provided by the onboard power supply. This setting allows the magnetic lock to flexibly adjust its working state according to the actual working conditions.

4. The damper electromagnetic latching device of claim 1, wherein: The input and output signals of the central control unit are electrically isolated through optocoupler isolation technology, which improves the device's anti-interference capability.

5. The damper electromagnetic latching device of claim 1, wherein: The wireless transceiver system communicates with the central control unit and the lower-level wireless communication device via a differential bus to ensure accurate and reliable data transmission.

6. The electromagnetic interlocking device for the damper according to claim 1, characterized in that: The central control unit stores a C language control program developed based on the Keil environment, which is used to perform power-on initialization, data acquisition, and logic decision-making. The program is then downloaded to the controller via serial port to realize intelligent control of the device.

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