Pneumatic self-resetting sealing mechanism of mining air door
By using a micro piezoelectric sensor array and ceramic pressure film in the pneumatic self-reset sealing mechanism of the mining valve, combined with intelligent pressure adjustment and multi-level seal detection module, the problems of poor sealing effect and excessive energy consumption when wind pressure changes are solved, precise sealing and energy consumption balance is achieved, and seal detection accuracy and emergency response capabilities are improved.
Patent Information
- Application Number
- CN202510602573.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-12
- Publication Date
- 2025-08-01
AI Technical Summary
The existing pneumatic self-resetting sealing mechanism for mining valves cannot dynamically adjust the cylinder working pressure based on the real-time downhole wind pressure, resulting in poor sealing effect or excessive energy consumption when the wind pressure changes, and the balance between sealing effect and energy consumption cannot be achieved.
A micro piezoelectric sensor array and ceramic pressure film are used to arrange multiple sensors around the door frame for pressure field scanning. The pressure adjustment unit controls the opening of the pressure reducing valve according to the sensor data to achieve accurate pressure adjustment. It combines an intelligent pressure adjustment module, a multi-level seal detection module, an emergency power supply guarantee module and a remote monitoring and early warning module to ensure the balance between sealing effect and energy consumption.
It achieves a balance between precise sealing effect and energy consumption when wind pressure changes, reduces air leakage rate, improves the accuracy of seal detection and emergency response capabilities, and supports remote monitoring and early warning.
Smart Images
Figure CN120402146A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of pneumatic self - resetting sealing equipment for mine air doors, and particularly to a pneumatic self - resetting sealing mechanism for mine air doors. Background Art
[0002] The pneumatic self - resetting sealing mechanism for mine air doors is a key device for the ventilation system in coal mines. Its main function is to achieve the automatic resetting and reliable sealing of the air doors, ensuring the stability and safety of the mine ventilation system.
[0003] The existing pneumatic self - resetting sealing mechanism for mine air doors cannot dynamically adjust the working pressure of the cylinder according to the real - time wind pressure underground. As a result, when the wind pressure changes, the sealing effect is poor or the energy consumption is too high, and the balance between the sealing effect and energy consumption cannot be achieved.
[0004] Aiming at the problem that the existing pneumatic self - resetting sealing mechanism for mine air doors has a poor sealing effect or high energy consumption when the wind pressure changes and cannot achieve the balance between the sealing effect and energy consumption, this solution uses a micro - piezoelectric sensor array and a ceramic pressure film to arrange multiple sensors around the door frame for pressure field scanning. Then, the pressure regulating unit controls the opening of the pressure reducing valve through the PWM signal according to the sensor data to achieve precise pressure regulation. Summary of the Invention
[0005] In order to overcome the problems raised in the above - mentioned background art.
[0006] The technical solution of the present invention is: a pneumatic self - resetting sealing mechanism for mine air doors, including a semi - trailer fixed door frame, an electric locking shaft, a reinforcing layer, a sealing rubber frame, a pneumatic telescopic rod, a connecting bracket, a first sealing door, a sealing gasket, an electromagnetic chuck, a first pneumatic drive machine, an air inlet machine, a pneumatic expansion sealing bag, and a limiting groove. There are two groups of semi - trailer fixed door frames. An electric locking shaft is arranged between the two groups of semi - trailer fixed door frames. A reinforcing layer is arranged on the surface of the semi - trailer fixed door frame. A sealing rubber frame is arranged inside the semi - trailer fixed door frame. Pneumatic telescopic rods are arranged on both sides of one side of the semi - trailer fixed door frame. One end of the pneumatic telescopic rod is provided with a connecting bracket. A first sealing door is arranged on one side of the connecting bracket. A sealing gasket is arranged on the bottom surface of the first sealing door. An electromagnetic chuck is arranged inside the sealing gasket. A plurality of first pneumatic drive machines are arranged inside the sealing rubber frame on the side where the sealing rubber frame fits the first sealing door. A pneumatic expansion sealing bag is arranged inside the sealing rubber frame on the side where the sealing rubber frame fits the first sealing door. A limiting groove is opened on the top surface of the semi - trailer fixed door frame.
[0007] Preferably, the distance between two sets of semi-trailer fixed door frames is tightened by an electric locking shaft to help the gaps between the semi-trailer fixed door frames and the sealant frames fit tightly. The rigidity of the semi-trailer fixed door frames is strengthened by a reinforcing layer. A pneumatic telescopic rod is driven to expand and contract by a first pneumatic drive machine. The connecting bracket is driven to move up and down by the pneumatic telescopic rod. The first sealing door is installed by the connecting bracket. The mine passage is sealed by the first sealing door. The connection between two sets of the first sealing doors is sealed and strengthened by a gasket. The electromagnetic chuck is automatically activated when the air pressure is insufficient to provide additional adsorption force to ensure reset. The pneumatic expansion sealing capsule is inflated by an air inlet machine. The connection between the sealant frame and the first sealing door is sealed and strengthened by the pneumatic expansion sealing capsule, so as to achieve the effect of multi-layer sealing and automatic reset of the mine air door.
[0008] Preferably, a rubber frame channel is arranged on one side of the semi-trailer fixed door frame. An airbag sealing layer is arranged on the outer side of the rubber frame channel. Multiple groups of airbag sealing layers are provided. A pneumatic rotating shaft is arranged inside the rubber frame channel. A second pneumatic drive machine is arranged on the top surface of the rubber frame channel. The second pneumatic drive machine is connected to the pneumatic rotating shaft through a connecting shaft. A second sealing door is arranged on the outer side of the pneumatic rotating shaft. Multiple installation grooves are formed on the surface of the second sealing door. Multiple groups of installation grooves are provided. A sealing detector is arranged inside the installation grooves.
[0009] Preferably, the pneumatic self-resetting sealing mechanism of the mine air door further comprises the following modules: Intelligent pressure regulation module: used for dynamically regulating the working pressure of the cylinder according to the real-time mine air pressure to balance the sealing effect and energy consumption; Multi-level sealing detection module: used for establishing a three-level sealing detection system to accurately locate the leakage points; Emergency power supply guarantee module: used for providing emergency power when the main power supply fails to guarantee the reset function; Environment adaptive coating module: used for automatically adjusting the surface characteristics of the door frame according to the environmental temperature and humidity to enhance the sealing performance; Remote monitoring and warning module: used for cloud monitoring of the equipment status and fault warning, and supporting remote maintenance.
[0010] Preferably, the intelligent pressure regulation module includes: A1001: Pressure sensing unit, including a micro piezoelectric sensor array and a ceramic pressure film, used for arranging 8 sensors around the door frame to realize 0-1 kPa pressure field scanning; A1002: Pressure regulation unit, including a proportional pressure reducing valve and a pressure feedback controller, used for controlling the opening of the pressure reducing valve through a PWM signal according to the sensor data.
[0011] Preferably, when the intelligent pressure regulation module is working, it includes: S1001: The piezoelectric sensor array synchronously collects the wind pressure data on the door frame surface at a sampling frequency of 100 Hz. The ceramic pressure film measures the working pressure of the cylinder in real time, with an accuracy of ±0.01 MPa; S1002: Transmit the sensor data to the pressure regulating controller via the CAN bus, and use the Kalman filter algorithm to fuse multi-sensor data to eliminate environmental noise interference; S1003: The controller is built-in with a PID algorithm, and calculates the pressure difference ΔP according to the current wind pressure P1 and the target sealing pressure; S1004: Introduce the wind pressure change rate compensation coefficient k to dynamically adjust the target pressure value; S1005: The proportional reducing valve receives the PWM control signal, adjusts the valve opening, and the cylinder pressure response time needs to be less than 0.3 s, and the overshoot is controlled within ±0.02 MPa; S1006: Conduct pressure closed-loop verification in each adjustment cycle. If the detected pressure deviation > 0.03 MPa for 3 consecutive times, trigger the self-check program and upload the fault code to the cloud.
[0012] Preferably, the multi-level seal detection module includes: A2001: The distributed detection unit, including a fiber Bragg grating sensor and a ring laser emitter, is used to deploy fiber optic sensors along the sealant frame to monitor micron-level deformations and locate the leakage area; A2002: The centralized analysis unit, including an edge computing chip and a seal state classification algorithm, is used to analyze the sensor data using a convolutional neural network to distinguish normal deformations from leakage deformations.
[0013] Preferably, when the multi-level seal detection module is working, it includes the following steps: S2001: The ring laser emitter generates 1550 nm laser, and scans the fiber Bragg grating sensor array arranged in a ring along the sealant frame. The initial scanning frequency is 20 Hz, and the spatial resolution is 5 mm; S2002: The FBG sensor detects the micron-level deformations of the sealant frame in the X / Y / Z three axes and synchronously collects temperature compensation data; S2003: Use wavelet packet transform to denoise the deformation signal and extract deformation characteristic parameters, including the maximum deformation value, the standard deviation of deformation distribution, and the deformation change rate; S2004: The convolutional neural network model classifies the characteristic parameters, and determines the leakage point coordinates through a three-dimensional space positioning algorithm.
[0014] Preferably, the emergency power supply guarantee module includes: A3,001: The power supply monitoring unit, including a supercapacitor voltage monitoring chip and a power supply status indicator light, is used to monitor the main power supply and the supercapacitor power in real time; A3002: Emergency power supply unit, including a graphene supercapacitor bank and a DC-DC boost converter, is used to store electrical energy and can quickly switch power supply after a power outage to ensure normal operation of the control system.
[0015] Preferably, the environmentally adaptive coating module comprises: A4001: Environmental sensing unit, including a micro temperature and humidity sensor and a dew point detection module, used to monitor the temperature and humidity on the door frame surface; A4002: Coating adjustment unit, including an electrowetting nanocoating and a pulse voltage controller, used to change the surface energy of the coating by applying a pulse voltage.
[0016] Preferably, the remote monitoring and early warning module includes: A5001: Data acquisition unit, including a multi-channel ADC acquisition card and a vibration monitoring sensor, used to collect multiple signals; A5002: Wireless transmission unit, including LoRaWAN communication module and antenna array, used for underground to surface penetration communication; A5003: Early warning processing unit, including FPGA early warning processor and sound and light alarm components, is used to run the fault prediction model and warn of potential faults 30 minutes in advance.
[0017] Beneficial effects of the present invention: 1. Compared to traditional mining damper pneumatic self-resetting sealing mechanisms, which cannot dynamically adjust the cylinder operating pressure based on the real-time wind pressure underground, this solution results in poor sealing performance or excessive energy consumption when wind pressure changes, and cannot achieve a balance between sealing performance and energy consumption. This solution uses a micro piezoelectric sensor array and ceramic pressure film, with multiple sensors arranged around the door frame to scan the pressure field. The pressure regulation unit then uses a PWM signal based on the sensor data to control the opening of the pressure reducing valve, achieving precise pressure regulation. 2. Compared with the pneumatic self-resetting sealing mechanism of traditional mining dampers, which lack a sophisticated sealing detection system, it is difficult to accurately locate the leakage point. When a sealing problem occurs, the leakage location cannot be found quickly and accurately, which increases the difficulty and time cost of maintenance. This solution uses fiber Bragg grating sensors and ring laser transmitters to deploy fiber optic sensors along the sealant frame to monitor micron-level deformation and locate the leakage area; through edge computing chips and sealing status classification algorithms, a convolutional neural network is used to analyze sensor data to distinguish normal deformation from leakage deformation. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 Shown is a first three-dimensional structural schematic diagram of the pneumatic self-resetting sealing mechanism for a mining air door of the present invention; Figure 2Shown is a second three-dimensional structural schematic diagram of the pneumatic self-resetting sealing mechanism of the mine air door of the present invention; Figure 3 Shown is a side three-dimensional structural schematic diagram of the pneumatic self-resetting sealing mechanism of the mine air door of the present invention; Figure 4 Shown is a first internal three-dimensional structural schematic diagram of the pneumatic self-resetting sealing mechanism of the mine air door of the present invention; Figure 5 Shown is a second internal three-dimensional structural schematic diagram of the pneumatic self-resetting sealing mechanism of the mine air door of the present invention; Explanation of reference numerals: 1. Semi-trailer fixed door frame; 201. Electric locking shaft; 202. Reinforcement layer; 203. Sealing rubber frame; 204. Pneumatic telescopic rod; 205. Connecting bracket; 206. First sealing door; 207. Sealing gasket; 208. Electromagnetic chuck; 209. First pneumatic drive; 210. Intake machine; 211. Pneumatic expansion sealing bladder; 212. Limit groove; 301. Rubber frame channel; 302. Air bladder sealing layer; 303. Pneumatic rotating shaft; 304. Second pneumatic drive; 305. Connecting shaft; 306. Second sealing door; 307. Installation groove; 308. Sealing detector. Detailed implementation manners
[0019] The present invention will be further described below with reference to the drawings and embodiments.
[0020] Please refer to Figure 2 And Figure 4 , the present invention provides an embodiment: a pneumatic self-resetting sealing mechanism for a mine air door, including a semi-trailer fixed door frame 1, an electric locking shaft 201, a reinforcement layer 202, a sealing rubber frame 203, a pneumatic telescopic rod 204, a connecting bracket 205, a first sealing door 206, a sealing gasket 207, an electromagnetic chuck 208, a first pneumatic drive 209, an intake machine 210, a pneumatic expansion sealing bladder 211 and a limit groove 212. There are two groups of semi-trailer fixed door frames 1, an electric locking shaft 201 is arranged between the two groups of semi-trailer fixed door frames 1, a reinforcement layer 202 is arranged on the surface of the semi-trailer fixed door frame 1, a sealing rubber frame 203 is arranged inside the semi-trailer fixed door frame 1, pneumatic telescopic rods 204 are arranged on both sides of one surface of the semi-trailer fixed door frame 1, a connecting bracket 205 is arranged at one end of the pneumatic telescopic rod 204, a first sealing door 206 is arranged on one side of the connecting bracket 205, a sealing gasket 207 is arranged on the bottom surface of the first sealing door 206, an electromagnetic chuck 208 is arranged inside the sealing gasket 207, a first pneumatic drive 209 is arranged inside the sealing rubber frame 203, there are multiple groups of first pneumatic drives 209, a pneumatic expansion sealing bladder 211 is arranged inside the surface of the sealing rubber frame 203 that fits the first sealing door 206, and a limit groove 212 is opened on the top surface of the semi-trailer fixed door frame 1.
[0021] Please refer to Figure 1 、 Figure 3 and Figure 5 In this embodiment, on one side of the semi-trailer fixed door frame 1, there is a rubber frame channel 301. On the outer side of the rubber frame channel 301, there is an airbag sealing layer 302. There are multiple groups of the airbag sealing layer 302. Inside the rubber frame channel 301, there is a pneumatic rotating shaft 303. On the top surface of the rubber frame channel 301, there is a second pneumatic drive machine 304. The second pneumatic drive machine 304 is connected to the pneumatic rotating shaft 303 through a connecting shaft 305. On the outer side of the pneumatic rotating shaft 303, there is a second sealing door 306. On the surface of the second sealing door 306, there are installation grooves 307. There are multiple groups of the installation grooves 307. Inside the installation grooves 307, there is a sealing detector 308. During use, through the rubber frame channel 301, staff can move forward. Through the airbag sealing layer 302, the outer side of the rubber frame channel 301 is protected. Through the second pneumatic drive machine 304, the connecting shaft 305 is driven to rotate. Through the connecting shaft 305, the second pneumatic drive machine 304 and the pneumatic rotating shaft 303 are connected. Through the pneumatic rotating shaft 303, the second sealing door 306 is installed. Through the second sealing door 306, the inside of the rubber frame channel 301 is sealed. Through the installation grooves 307, the sealing detector 308 is installed. Through the sealing detector 308, the sealing performance of the second sealing door 306 is detected.
[0022] In this embodiment, the pneumatic self-resetting sealing mechanism for mine air doors further includes the following modules: Intelligent pressure regulation module: used to dynamically regulate the working pressure of the cylinder according to the real-time mine air pressure, and balance the sealing effect and energy consumption; Multi-level sealing detection module: used to establish a three-level sealing detection system for accurate positioning of leakage points; Emergency power supply guarantee module: used to provide emergency power when the main power fails to guarantee the reset function; Environment adaptive coating module: used to automatically adjust the surface characteristics of the door frame according to the environmental temperature and humidity to enhance the sealing performance; Remote monitoring and early warning module: used to monitor the equipment status in the cloud and give early warnings of faults, and support remote maintenance.
[0023] Preferably, the intelligent pressure regulation module includes: A1001: Pressure sensing unit, including a micro piezoelectric sensor array and a ceramic pressure film, used to arrange 8 sensors around the door frame to realize 0-1 kPa pressure field scanning; A1002: Pressure regulation unit, including a proportional pressure reducing valve and a pressure feedback controller, used to control the opening of the pressure reducing valve through PWM signals according to the sensor data.
[0024] Preferably, when the intelligent pressure regulation module is working, it includes: S1001: The piezoelectric sensor array synchronously collects the wind pressure data on the door frame surface at a sampling frequency of 100 Hz. The ceramic pressure film measures the cylinder working pressure in real time with an accuracy of ±0.01 MPa; S1002: Transmit the sensor data to the pressure regulating controller via the CAN bus, and use the Kalman filter algorithm to fuse multi-sensor data to eliminate environmental noise interference; S1003: The controller has a built-in PID algorithm, and calculates the pressure difference ΔP according to the current wind pressure P1 and the target sealing pressure; S1004: Introduce the wind pressure change rate compensation coefficient k to dynamically adjust the target pressure value; S1005: The proportional reducing valve receives the PWM control signal, adjusts the valve opening, and the cylinder pressure response time needs to be less than 0.3 s, and the overshoot is controlled within ±0.02 MPa; S1006: Conduct a pressure closed-loop verification for each adjustment cycle. If the detected pressure deviation > 0.03 MPa for 3 consecutive times, trigger the self-check program and upload the fault code to the cloud.
[0025] Preferably, the multi-level seal detection module includes: A2001: The distributed detection unit, including a fiber Bragg grating sensor and a ring laser emitter, is used to deploy fiber sensors along the sealant frame to monitor micron-level deformations and locate leakage areas; A2002: The centralized analysis unit, including an edge computing chip and a seal state classification algorithm, is used to analyze the sensor data using a convolutional neural network to distinguish normal deformations from leakage deformations.
[0026] Preferably, when the multi-level seal detection module is working, it includes the following steps: S2001: The ring laser emitter generates 1550 nm laser, and scans the fiber Bragg grating sensor array arranged in a ring along the sealant frame. The initial scanning frequency is 20 Hz, and the spatial resolution is 5 mm; S2002: The FBG sensor detects the micron-level deformations of the sealant frame in the X / Y / Z three axes and synchronously collects temperature compensation data; S2003: Use wavelet packet transform to denoise the deformation signal and extract deformation characteristic parameters, including the maximum deformation value, the standard deviation of deformation distribution, and the deformation change rate; S2004: The convolutional neural network model classifies the characteristic parameters, and determines the leakage point coordinates through a three-dimensional space positioning algorithm.
[0027] Preferably, the emergency power supply guarantee module includes: A3001: Power monitoring unit, including a supercapacitor voltage monitoring chip and a power status indicator light, for real-time monitoring of the main power supply and the supercapacitor power; A3002: Emergency power supply unit, including a graphene supercapacitor bank and a DC-DC boost converter, for storing electrical energy, which can quickly switch to power supply after a power outage to ensure the normal operation of the control system.
[0028] Preferably, the environment adaptive coating module includes: A4001: Environment perception unit, including a micro temperature and humidity sensor and a dew point detection module, for monitoring the temperature and humidity on the surface of the door frame; A4002: Coating adjustment unit, including an electro-wetting nano coating and a pulsed voltage controller, for changing the surface energy of the coating by applying a pulsed voltage.
[0029] Preferably, the remote monitoring and warning module includes: A5001: Data acquisition unit, including a multi-channel ADC acquisition card and a vibration monitoring sensor, for acquiring multiple signals; A5002: Wireless transmission unit, including a LoRaWAN communication module and an antenna array, for performing penetration communication from underground to the ground; A5003: Warning processing unit, including an FPGA warning processor and an audible and visual alarm component, for running a fault prediction model to give an early warning of potential faults 30 minutes in advance.
[0030] Embodiment 1 S3001: Install two groups of semi-trailer fixed door frames 1 on both sides of the roadway, pre-tighten them through an electric locking shaft 201, and cooperate with the surface reinforcement layer 202 of the door frame to ensure rigidity; S3002: Install an ethylene propylene diene monomer rubber sealing rubber frame inside the door frame, and internally embed a pneumatic expansion sealing capsule 211; S^3003: Configure 4 groups of pneumatic telescopic rods 204 on each side of the door frame, and drive the connecting bracket 205 through a first pneumatic drive 209 to drive the first sealing door 206 to translate and close; S3004: Install an intelligent pressure regulation module on the top of the roadway. 8 micro piezoelectric sensors scan the wind pressure on the surface of the door frame in real time, and dynamically regulate the cylinder pressure through a PWM controlled proportional pressure reducing valve; S3005: Arrange fiber Bragg grating sensors along the sealing rubber frame, cooperate with a ring laser emitter to scan for deformation, and the edge computing chip uses a convolutional neural network to analyze data, with a leakage positioning accuracy of ±10 mm; S3006: Configure a graphene supercapacitor bank. When the main power supply fails, the DC-DC boost converter can maintain the system operation for 45 minutes; S3007: The surface of the door frame is coated with an electro-wetting nano-coating, and the surface energy is adjusted by a pulse voltage controller, automatically switching to the super-hydrophobic mode when the humidity > 95%; S3008: Deploy a LoRaWAN communication module to transmit data through the rock formation. The FPGA early warning processor analyzes vibration / pressure anomalies and gives an early warning of faults 30 minutes in advance.
[0031] Implementation effect: The measured air leakage rate is reduced from 12.3% to 1.8%. The pneumatic expansion seal bag automatically compensates in case of sudden negative pressure, maintaining the contact surface pressure > 0.4 MPa. In the power-off test, the electromagnetic chuck cooperates with the pneumatic reset mechanism to complete the closing of the double doors within 4.2 seconds. When simulating a roadway fire, the environment-adaptive coating prevents the deformation of the door frame, and no cracking occurs in the sealant frame.
[0032] The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the gist of the present invention.
Claims
1. Pneumatic self-resetting sealing mechanism for mine air door; characterized in that: It includes a semi-trailer fixed door frame (1), an electric locking shaft (201), a reinforcing layer (202), a sealant frame (203), a pneumatic telescopic rod (204), a connecting bracket (205), a first sealing door (206), a gasket (207), an electromagnetic chuck (208), a first pneumatic drive machine (209), an air intake machine (210), a pneumatic expansion seal bladder (211) and a limit groove (212). There are two groups of semi-trailer fixed door frames (1). An electric locking shaft (201) is arranged between the two groups of semi-trailer fixed door frames (1). A reinforcing layer (202) is arranged on the surface of the semi-trailer fixed door frame (1). A sealant frame (203) is arranged inside the semi-trailer fixed door frame (1). Pneumatic telescopic rods (204) are arranged on both sides of one side of the semi-trailer fixed door frame (1). One end of the pneumatic telescopic rod (204) is provided with a connecting bracket (205). A first sealing door (206) is arranged on one side of the connecting bracket (205). A gasket (207) is arranged on the bottom surface of the first sealing door (206). An electromagnetic chuck (208) is arranged inside the gasket (207). A first pneumatic drive machine (209) is arranged inside the sealant frame (203). There are multiple groups of the first pneumatic drive machines (209). A pneumatic expansion seal bladder (211) is arranged inside the surface of the sealant frame (203) that fits the first sealing door (206). A limit groove (212) is opened on the top surface of the semi-trailer fixed door frame (1).
2. The pneumatic self-resetting sealing mechanism for mine air doors according to claim 1, characterized in that: A glue frame channel (301) is arranged on one side of the semi-trailer fixed door frame (1). An airbag seal layer (302) is arranged outside the glue frame channel (301). There are multiple groups of the airbag seal layers (302). A pneumatic rotating shaft (303) is arranged inside the glue frame channel (301). A second pneumatic drive machine (304) is arranged on the top surface of the glue frame channel (301). The second pneumatic drive machine (304) is connected to the pneumatic rotating shaft (303) through a connecting shaft (305). A second sealing door (306) is arranged outside the pneumatic rotating shaft (303). Installation grooves (307) are opened on the surface of the second sealing door (306). There are multiple groups of the installation grooves (307). A seal detector (308) is arranged inside the installation grooves (307).
3. The pneumatic self-resetting sealing mechanism for mine air doors according to claims 1-2, characterized in that: The pneumatic self-resetting seal mechanism for mine air doors also includes the following modules: Intelligent pressure regulation module: used to dynamically regulate the working pressure of the cylinder according to the real-time air pressure in the mine, and balance the sealing effect and energy consumption; Multi-level seal detection module: used to establish a three-level seal detection system for accurate positioning of leakage points; Emergency power supply guarantee module: used to provide emergency power when the main power fails to guarantee the reset function; Environment adaptive coating module: used to automatically adjust the surface characteristics of the door frame according to the environmental temperature and humidity to enhance the sealing performance; Remote monitoring and early warning module: used to monitor the equipment status in the cloud and give early warnings of faults, and support remote maintenance.
4. The pneumatic self-resetting sealing mechanism for mine air doors according to claim 3, characterized in that: The intelligent pressure regulation module includes: A1001: Pressure sensing unit, including a micro piezoelectric sensor array and a ceramic pressure film, used to arrange 8 sensors around the door frame to realize 0-1 kPa pressure field scanning; A1002: Pressure regulation unit, including a proportional pressure reducing valve and a pressure feedback controller, which is used to control the opening of the pressure reducing valve through a PWM signal according to the sensor data.
5. The pneumatic self-resetting sealing mechanism for mine air doors according to claim 4, characterized in that: When the intelligent pressure regulation module is working, it includes: S1001: The piezoelectric sensor array synchronously collects the wind pressure data on the door frame surface, with a sampling frequency of 100 Hz. The ceramic pressure film measures the cylinder working pressure in real time, with an accuracy of ±0.01 MPa; S1002: Transmit the sensor data to the pressure regulation controller through the CAN bus, and use the Kalman filter algorithm to fuse the multi-sensor data to eliminate environmental noise interference; S1003: The controller has a built-in PID algorithm, which calculates the pressure difference ΔP according to the current wind pressure P1 and the target sealing pressure; S1004: Introduce the wind pressure change rate compensation coefficient k to dynamically adjust the target pressure value; S1005: The proportional pressure reducing valve receives the PWM control signal and adjusts the valve opening. The cylinder pressure response time needs to be less than 0.3 s, and the overshoot is controlled within ±0.02 MPa; S1006: Conduct a pressure closed-loop verification for each adjustment cycle. If the detected pressure deviation > 0.03 MPa for 3 consecutive times, trigger the self-check program and upload the fault code to the cloud.
6. The pneumatic self-resetting sealing mechanism for mine air doors according to claim 3, characterized in that: The multi-level seal detection module includes: A2001: Distributed detection unit, including a fiber Bragg grating sensor and a ring laser emitter, which is used to deploy fiber optic sensors along the sealant frame to monitor micron-level deformations and locate the leakage area; A2002: Centralized analysis unit, including an edge computing chip and a seal state classification algorithm, which is used to analyze the sensor data using a convolutional neural network to distinguish normal deformations from leakage deformations.
7. The pneumatic self-resetting sealing mechanism for mine air doors according to claim 6, characterized in that: When the multi-level seal detection module is working, it includes the following steps: S2001: The ring laser emitter generates 1550 nm laser, and the fiber Bragg grating sensor array deployed along the sealant frame in a ring shape is scanned. The initial scan frequency is 20 Hz, and the spatial resolution is 5 mm; S2002: The FBG sensor detects the micron-level deformations of the sealant frame in the X / Y / Z three axes and synchronously collects temperature compensation data; S2003: Use wavelet packet transform to denoise the deformation signal and extract deformation characteristic parameters, including the maximum deformation value, the standard deviation of deformation distribution, and the deformation change rate; S2004: The convolutional neural network model classifies the characteristic parameters and determines the leakage point coordinates through a three-dimensional space positioning algorithm.
8. The pneumatic self-resetting sealing mechanism for mine air doors according to claim 3, characterized in that: The emergency power supply guarantee module includes: A3001: Power monitoring unit, including a supercapacitor voltage monitoring chip and a power status indicator, which is used to monitor the power of the main power supply and the supercapacitor in real time; A3002: Emergency power supply unit, including a graphene supercapacitor bank and a DC-DC boost converter, which is used to store electrical energy and can quickly switch the power supply after a power outage to ensure the normal operation of the control system.
9. The pneumatic self-resetting sealing mechanism for mine air doors according to claim 3, wherein: The environment adaptive coating module includes: A4001: Environment perception unit, including a micro temperature and humidity sensor and a dew point detection module, which is used to monitor the temperature and humidity on the door frame surface; A4002: Coating adjustment unit, including an electro-wetting nano coating and a pulsed voltage controller, which is used to change the surface energy of the coating by applying a pulsed voltage.
10. The pneumatic self-resetting sealing mechanism for mine air doors according to claim 3, characterized in that: The remote monitoring and warning module includes: A5001: Data acquisition unit, including a multi-channel ADC acquisition card and vibration monitoring sensors, for collecting multiple signals; A5002: Wireless transmission unit, including a LoRaWAN communication module and an antenna array, for performing penetration communication from underground to the ground; A5003: Early warning processing unit, including an FPGA early warning processor and an acoustic-optic alarm component, for running a fault prediction model to give an early warning of potential faults 30 minutes in advance.