Mine impact-resistant air door

Abstract

This invention discloses a mine impact-resistant ventilation door, characterized by comprising a door body system, a drive system, a load-bearing system, and a control system. The load-bearing system includes a door frame for supporting the door body system. The door body system includes a roller shutter door and a roller shaft, with the roller shaft rotatably mounted on the upper part of the roller shutter door. The roller shutter door is composed of multiple hinged metal shutter plates, with one end of the roller shutter door wound onto the roller shaft and the other end being a free end that can move up and down along the guide structure of the door frame. The drive system is driven and connected to the roller shaft. The control system includes a controller, which is electrically connected to the drive system and also electrically connected to a sensor assembly. This invention achieves rapid retraction of the flexible, retractable door before blasting to avoid shock wave damage and rapid closure to restore ventilation after blasting. Combined with remote control, it improves impact resistance and ventilation recovery efficiency, eliminates the vulnerability and pinching hazards of rigid ventilation doors, and enhances the safety and intelligence level of underground ventilation systems.

Description

Technical Field

[0001] This invention relates to the field of mine ventilation safety technology, and in particular to a mine impact-resistant air door. Background Technology

[0002] In mining, especially underground mining, ventilation systems are the "lifeline" for ensuring safe production. Traditional mine ventilation systems typically use fixed air doors with brick-concrete structures or steel frames to separate and control airflow in the mining area. However, traditional air doors reveal many technical limitations when faced with frequent blasting operations in mines.

[0003] First, their impact resistance is severely insufficient: the high-pressure shock wave generated during blasting can cause irreversible deformation or direct damage to the rigid ventilation door structure, leading not only to door malfunction but also requiring significant manpower and resources for repair or replacement, severely impacting ventilation continuity and production progress. Second, they lack operational flexibility: fixed ventilation doors cannot be opened and closed quickly, often requiring close-range operation by personnel before and after blasting operations, a cumbersome and inefficient process that is difficult to match with the dynamic pace of mining operations. Third, they pose significant safety risks: traditional ventilation doors lack effective intelligent sensing protection mechanisms, making them highly susceptible to accidents that could pinch personnel or equipment during closing, posing a significant safety hazard. Furthermore, if ventilation is interrupted due to blasting or other disasters, restoring effective ventilation using traditional ventilation doors is time-consuming, threatening the safety of the underground environment. Summary of the Invention

[0004] The present invention aims to at least partially solve one of the technical problems in the related art.

[0005] To achieve the above objectives, the present invention proposes a mine impact-resistant ventilation door, comprising a door body system, a drive system, a load-bearing system, and a control system;

[0006] The load-bearing system includes a door frame for supporting the door system; The door system includes a roller shutter door body and a roller shaft, the roller shaft being rotatably mounted on the upper part of the door frame; the roller shutter door body is composed of multiple metal roller shutter plates that are hinged to each other, one end of the roller shutter door body is wound on the roller shaft, and the other end is a free end that can move up and down along the guide structure of the door frame, for opening or closing the damper passage. The drive system is connected to the roller drive and is used to drive the roller to rotate in order to realize the opening and closing of the roller shutter door. The control system includes a controller, which is electrically connected to the drive system and is also electrically connected to a sensor assembly.

[0007] This invention abandons the traditional rigid ventilation door structure. Through a roller shutter door body composed of hinged metal roller shutters and a roller retraction mechanism, the door body can be quickly rolled up to open the tunnel cross-section or quickly lowered to close the ventilation duct. The control system receives blasting warnings or recovery commands via a remote communication interface. Before blasting operations, the roller shutter door body is automatically or remotely retracted, allowing the shock wave to pass through unimpeded, fundamentally avoiding structural damage to rigid ventilation doors caused by shock waves. After blasting operations, the control system controls the roller shutter door body to descend and close, quickly restoring the ventilation system. This flexible and retractable structure achieves synergy between blast protection and ventilation control, resolving the contradiction between blasting operations and ventilation stability in metal mines. Simultaneously, remote control reduces personnel exposure risks, improves operational efficiency, and enhances the inherent safety level of the system.

[0008] Optionally, the door frame includes a top plate support and a side door frame. The top plate support is fixed to the top plate of the tunnel by anchor bolts, and the side door frame is fixed to the side wall of the tunnel by anchor bolts. The inner side of the side door frame is provided with a U-shaped guide groove, and the free ends of the roller shutter door body are slidably fitted into the U-shaped guide groove.

[0009] Furthermore, the drive system includes an explosion-proof motor and a worm gear reducer, wherein the output shaft of the explosion-proof motor is connected to the input shaft of the worm gear reducer, and the output shaft of the worm gear reducer is connected to the reel.

[0010] Furthermore, the sensor assembly includes an infrared beam sensor, which is disposed on the front and rear sides of the damper and electrically connected to the controller; the controller is used to control the drive system to stop the roller shutter from descending or to reverse and retract when it receives a signal that the infrared beam sensor is blocked during the closing process of the roller shutter.

[0011] Furthermore, the sensor assembly includes a position sensor, which is used to detect the lifting position of the roller shutter door and feed the position signal back to the control system; The control system is also used to adjust the damper opening based on the position signal.

[0012] Furthermore, the sensor assembly includes a vibration sensor, which is installed in the door frame or the surrounding rock of the tunnel and electrically connected to the controller for detecting the shock wave generated by blasting.

[0013] Furthermore, the controller is equipped with a remote communication interface for receiving external control commands. It is connected to a remote control platform through the remote communication interface to receive control commands issued by the remote control platform.

[0014] Furthermore, the control systems of the multiple dampers are electrically or communicatively connected to each other so that the control systems of the multiple dampers work together to control the roller shutters of the multiple dampers to descend sequentially according to a preset order and interval, so as to avoid drastic fluctuations in wind pressure.

[0015] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein: Figure 1 This is a schematic diagram of the overall structure of a mine impact-resistant air door according to the present invention.

[0017] Explanation of reference numerals in the attached figures: 1. Door frame; 11. Top plate bracket; 12. Side door frame; 121. U-shaped guide groove; 2. Roller shaft; 3. Roller shutter door body; 31. Metal roller shutter plate; 4. Drive system; 41. Explosion-proof motor; 42. Worm gear reducer; 5. Controller; 6. Infrared beam sensor; 7. Position sensor; 8. Vibration sensor. Detailed Implementation

[0018] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0019] This invention proposes a mine impact-resistant ventilation door, including a door body system, a drive system, a load-bearing system, and a control system; The load-bearing system includes a door frame 1 for supporting the door system; The door system includes a roller shutter door body 3 and a roller 2. The roller 2 is rotatably mounted on the upper part of the door frame 1. The roller shutter door body 3 is composed of multiple metal roller shutter plates 31 that are hinged to each other. One end of the roller shutter door body 3 is wound on the roller 2, and the other end is a free end that can move up and down along the guide structure of the door frame 1 to open or close the damp door passage. The drive system is connected to the roller 2 and is used to drive the roller 2 to rotate so as to realize the opening and closing of the roller shutter door 3; The control system includes a controller 5, which is a PLC controller. The controller 5 is electrically connected to the drive system and also electrically connected to the sensor assembly.

[0020] This invention establishes a retractable door system by installing a roller 2 on the upper part of the door frame 1 and winding a roller shutter door body 3, composed of a hinged metal roller shutter plate 31, around it. It abandons the traditional rigid air door structure, and through the roller shutter door body 3, composed of a hinged metal roller shutter plate, and the roller 2's retraction mechanism, the door body can be quickly rolled up to open the tunnel cross-section or quickly lowered to close the air duct. When blasting operations are required, the controller 5 receives dispatch instructions through a remote communication interface, and the drive system 4 drives the roller 2 to rotate, quickly rolling up the roller shutter door body 3, opening the entire tunnel cross-section. The shock wave generated by the blast can pass through without obstruction, thus avoiding the structural deformation and damage of traditional rigid air doors due to frontal impact, fundamentally solving the problem of insufficient shock resistance of air doors. After the blast, the controller 5 controls the drive system 4 to rotate the roller 2 in the opposite direction, and the roller shutter door body 3 smoothly descends along the guide structure to the closed position, quickly restoring ventilation separation. The entire retraction and opening process requires no on-site personnel operation, achieving rapid response and matching to the dynamic rhythm of blasting operations.

[0021] In some embodiments, the door frame 1 includes a top plate support 11 and a side door frame 12. The top plate support 11 is fixed in the stable rock layer of the roadway roof by anchor bolts, and the side door frame 12 is fixed in the stable rock layer of the roadway sidewall by anchor bolts. The inner side of the side door frame 12 is provided with a U-shaped guide groove 121, and the free ends of the roller shutter door 3 are slidably fitted into the U-shaped guide groove 121 to form a guide structure.

[0022] The roof support 11 is made of I-beams or heavy-duty channel steel and is anchored to the tunnel roof with anchor bolts. It can withstand all static and dynamic impact loads of the roller 2, roller shutter door 3, and drive system 4, ensuring the stability of the equipment during long-term operation. The side door frame 12 is also anchored to the tunnel side wall, and its inner U-shaped guide groove 121 provides a precise straight guide path for the raising and lowering of the roller shutter door 3. During the raising and lowering process, both sides of the roller shutter door 3 slide within the U-shaped guide groove 121, effectively preventing the door curtain from deviating, getting stuck, or shaking, ensuring the smooth and reliable raising and lowering of the door, and also enhancing the sealing and bearing capacity against wind pressure after the door is closed.

[0023] In some embodiments, the drive system 4 includes an explosion-proof motor 41 and a worm gear reducer 42. The output shaft of the explosion-proof motor 41 is connected to the input shaft of the worm gear reducer 42, and the output shaft of the worm gear reducer 42 is connected to the reel 2.

[0024] The explosion-proof motor 41 meets the explosion-proof requirements for underground operation and can operate safely in hazardous environments containing methane. The worm gear reducer 42 converts the high-speed, low-torque output of the motor into a low-speed, high-torque output, directly driving the roller 2 to rotate, thus achieving smooth opening and closing of the heavy-duty roller shutter door 3. The unique self-locking function of the worm gear mechanism ensures that the roller 2 will not reverse due to the weight of the door when the motor stops, ensuring that the roller shutter door 3 can be stably maintained in any position without the need for an additional braking device, which improves safety and simplifies the system structure.

[0025] In some embodiments, the sensor assembly includes an infrared beam sensor 6, which is disposed on the front and rear sides of the damper and electrically connected to the controller 5. When the controller 5 receives a signal that the infrared beam sensor 6 is blocked during the closing process of the roller shutter door 3, it controls the drive system 4 to stop the roller shutter door 3 from lowering or to retract it in the opposite direction.

[0026] During the automatic or remote closing of the roller shutter door 3, if a pedestrian or vehicle passes through the damper area, their body or vehicle will block the infrared beam of the infrared beam sensor 6. Upon receiving the blocking signal, the controller 5 immediately responds, stopping the lowering action of the roller shutter door 3, or even reversing the action to raise and open the door. This completely eliminates the risk of injury to personnel or damage to equipment that may occur during the closing process of traditional dampers, significantly improving personnel safety and equipment protection.

[0027] In some embodiments, the sensor assembly includes a position sensor 7, which is used to detect the lifting position of the roller shutter door 3 and feed the position signal back to the controller 5; the controller 5 is also used to adjust the opening of the damper according to the position signal.

[0028] Position sensor 7 is positioned along the movement stroke of roller shutter door 3 to sense the height position of the lower end of the door in real time. Controller 5 compares the feedback from position sensor 7 with a preset opening value and precisely adjusts the lifting stroke of roller shutter door 3 through closed-loop control, achieving stepless and precise adjustment of the ventilation cross-sectional area to achieve on-demand airflow adjustment. This design allows the damper to not only have full open and close functionality but also function as an adjustable vent to meet airflow distribution needs under different ventilation conditions.

[0029] In some embodiments, the sensor assembly further includes a vibration sensor 8, which is installed in the door frame 1 or the surrounding rock of the tunnel and electrically connected to the controller 5 for detecting the shock wave generated by blasting.

[0030] Vibration sensor 8 can detect the vibration signal of the surrounding rock caused by blasting in real time and transmit it to controller 5. Controller 5 can use this signal to determine the occurrence and intensity of the blasting operation, which serves as an auxiliary basis for triggering the retraction action of roller shutter door 3, further improving the system's timeliness and automation in response to blasting events.

[0031] In some embodiments, the controller 5 is provided with a remote communication interface for receiving external control commands, and is connected to a remote control platform through the remote communication interface to receive control commands issued by the remote control platform.

[0032] After being networked, ventilation dispatchers can monitor the operational status of all air doors in the entire mine in real time through the intelligent ventilation platform from the surface dispatch room, and control the opening and closing of the air doors individually or in groups. Before blasting, the dispatcher issues a unified retraction command on the platform, and the air doors along the line automatically execute according to preset logic; after blasting, after environmental sensors and personnel confirm safety, a reset command is issued with one click, and the entire ventilation system quickly returns to its pre-blasting state. This centralized remote control mode greatly shortens ventilation interruption time, reduces the frequency of personnel operations underground, and ensures rapid ventilation restoration and personnel safety.

[0033] In some embodiments, the controllers 5 of the multiple dampers are electrically or communicatively connected to each other so that the controllers 5 of the multiple dampers work together to control the roller shutters 3 of the multiple dampers to be lowered sequentially according to a preset order and interval, so as to avoid violent fluctuations in wind pressure.

[0034] When multiple sets of air doors need to be closed simultaneously, if all air doors are lowered at the same time, the airflow cross-section in the roadway will change dramatically and instantaneously, potentially causing severe air pressure fluctuations or even local airflow reversals, impacting ventilation structures and the underground environment. In this embodiment, the controllers 5 of each air door are coordinated through the mine communication network, and they are lowered sequentially in a "main first, auxiliary second" order. For example, the air doors in the main haulage roadway are closed first, and then the air doors in the auxiliary roadways are closed one by one a few seconds later, ensuring a smooth transition of airflow and pressure in the ventilation system, avoiding safety hazards caused by pressure fluctuations, and ensuring the stability of the entire ventilation network.

[0035] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0037] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0038] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0039] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0040] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A mine-use impact-resistant ventilation door, characterized in that, This includes the door frame, door body system, drive system, load-bearing system, and control system; The load-bearing system includes a door frame for supporting the door system; The door system includes a roller shutter door body and a roller shaft, the roller shaft being rotatably mounted on the upper part of the door frame; the roller shutter door body is composed of multiple metal roller shutter plates that are hinged to each other, one end of the roller shutter door body is wound on the roller shaft, and the other end is a free end that can move up and down along the guide structure of the door frame, for opening or closing the damper passage. The drive system is connected to the roller drive and is used to drive the roller to rotate in order to realize the opening and closing of the roller shutter door. The control system includes a controller, which is electrically connected to the drive system and is also electrically connected to a sensor assembly.

2. The mine impact-resistant ventilation door as described in claim 1, characterized in that, The door frame includes a top plate support and a side door frame. The top plate support is fixed to the top plate of the tunnel by anchor bolts, and the side door frame is fixed to the side wall of the tunnel by anchor bolts. The inner side of the side door frame is provided with a U-shaped guide groove, and the free ends of the roller shutter door body are slidably fitted into the U-shaped guide groove.

3. The mine impact-resistant ventilation door as described in claim 1, characterized in that, The drive system includes an explosion-proof motor and a worm gear reducer. The output shaft of the explosion-proof motor is connected to the input shaft of the worm gear reducer, and the output shaft of the worm gear reducer is connected to the reel.

4. The mine impact-resistant ventilation door as described in claim 1, characterized in that, The sensor assembly includes an infrared beam sensor, which is disposed on the front and rear sides of the damper and electrically connected to the controller. When the controller receives a signal that the infrared beam sensor is blocked during the closing process of the roller shutter door, it controls the drive system to stop the roller shutter door from descending or to reverse and retract it.

5. A mine-use impact-resistant ventilation door as described in claim 1, characterized in that, The sensor assembly includes a position sensor, which is used to detect the lifting position of the roller shutter door and feed the position signal back to the control system. The control system is also used to adjust the damper opening based on the position signal.

6. A mine-use impact-resistant ventilation door as described in claim 1, characterized in that, The sensor assembly includes a vibration sensor, which is installed in the door frame or the surrounding rock of the tunnel and electrically connected to the controller for detecting the shock wave generated by blasting.

7. A mine-use impact-resistant ventilation door as described in claim 1, characterized in that, The controller is equipped with a remote communication interface for receiving external control commands. It is connected to a remote control platform through the remote communication interface to receive control commands issued by the remote control platform.

8. A mine impact-resistant ventilation door as described in claim 7, characterized in that, The control systems of multiple dampers are electrically or communicatively connected to each other so that the control systems of multiple dampers work together to control the roller shutters of multiple dampers to descend sequentially according to a preset order and interval, so as to avoid drastic fluctuations in wind pressure.

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