Mine high-precision automatic adjusting air window

Abstract

The invention discloses a mine high-precision automatic adjusting air window which comprises a back plate and an adjusting plate, the back plate is provided with an air window, a limiting sliding rail is fixedly arranged at the lower end of the back plate, and a limiting pulley is arranged at the lower end of the adjusting plate; the back plate is provided with a driving assembly, and the driving assembly comprises a lead screw and an electric motor; the backboard is provided with an electric control box, and the electric control box comprises an MCU control module, a sensing module and a communication module; the MCU control module is used for calculating an accurate air window adjusting amount through an air window area calculation formula, converting a digital signal into an electric signal and transmitting the electric signal to the electric motor, the electric motor executes an adjusting action, and the sensing module is used for monitoring a pressure difference value of two sides of the air window and uploading the pressure difference value to the MCU control module; and the communication module is used for receiving the control instruction of the MCU control module and recording the received data. According to the application, the MCU control module accurately calculates the adjusting quantity, and accurately controls the action of the execution mechanism in combination with the reduction ratio of the speed reduction electric motor and the pulse signal, so that the accurate control of the air window air passing quantity is realized, and the rapid and accurate regulation and control of the mine air window air passing quantity are further completed, so that the real-time air regulation requirement of an underground ventilation system is met.

Description

Technical Field

[0001] This invention relates to the field of coal mine ventilation, and in particular to a high-precision automatic adjustable ventilation window for mines. Background Technology

[0002] Coal mine ventilation is a top priority for coal mine safety. The ventilation system serves to supply fresh air underground, dilute methane, and expel harmful gases. Due to factors such as mining operations, roadway deformation, debris accumulation, and seasonal changes, the airflow at ventilation points can fluctuate, resulting in a constantly changing underground airflow. Furthermore, factors like abnormal gas outbursts and dust can further alter the required airflow at ventilation points. Therefore, the airflow at these points must be dynamically adjusted to a suitable range based on real-time demand. Excessive airflow leads to increased air leakage and resource waste, while insufficient airflow hinders the removal of methane and other harmful gases.

[0003] A ventilation system consists of a ventilation network, equipment, and control facilities, including structures such as air doors, air bridges, and air windows, and employs mechanical or natural ventilation methods. Mine air windows are installed in the walls or doors within the roadways, with an adjustable window area to regulate airflow.

[0004] However, existing mine ventilation window adjustments are mostly done manually using baffles or pneumatically operated louvers. Manual baffle adjustment requires manual operation and has low accuracy and is relatively slow. Pneumatically operated louvers have drawbacks such as difficulty in measuring airflow, low accuracy, and high local resistance. None of these methods can achieve precise adjustment of the airflow through the mine ventilation windows and cannot meet the real-time control requirements of the underground ventilation system. Summary of the Invention

[0005] In order to achieve rapid and precise control of the airflow through the mine ventilation window to meet the real-time air adjustment needs of the underground ventilation system, this application provides a high-precision automatic adjustable ventilation window for mines.

[0006] This application provides a high-precision automatic adjustable ventilation window for mines, employing the following technical solution: A high-precision automatic adjustable ventilation window for mines includes a back plate and an adjusting plate. The back plate has a ventilation window for ventilation. A limiting slide rail is fixed at the lower end of the back plate along the length direction. The lower end of the adjusting plate is provided with a limiting pulley that cooperates with the limiting slide rail. The back plate is provided with a drive assembly for realizing the horizontal movement of the adjusting plate. The drive assembly includes a lead screw and an electric motor. The back panel houses the electrical control box, which includes an MCU control module, a sensing module, and a communication module; among which, The MCU control module is electrically connected to the sensing module, the communication module and the electric motor respectively. The MCU control module is used to calculate the accurate windshield adjustment amount through the windshield area calculation formula, and convert the digital signal into an electrical signal and transmit it to the electric motor, which then performs the adjustment action. The sensing module includes differential pressure sensors installed on both sides of the windshield. The differential pressure sensors are used to monitor the differential pressure value on both sides of the windshield and upload it to the MCU control module. The communication module is used to receive control commands from the MCU control module and record the received data.

[0007] Optionally, when calculating the windshield adjustment amount, the MCU control module uses a geared electric motor with a rotary encoder, and the gear ratio of the geared electric motor is [missing information]. n 1. The rotary encoder generates 1 unit of power per revolution. x For every pulse, the rotary encoder generates a total of [number] pulses per revolution of the output shaft of the geared electric motor. nx One pulse; simultaneously, the lead screw pitch is y m; then, for every revolution of the output shaft of the geared electric motor, the lead of the lead screw is y m; the lead of the lead screw represented by each pulse is y / nx m; the height of the windshield opening is H m; the area that the windshield needs to be adjusted is S m 2 The distance the adjusting plate needs to move is: S / H The precise adjustment of the windshield opening area is achieved by controlling the number of pulses generated by the geared electric motor. The number of pulses required for the geared electric motor to operate is: ; Area of ​​the window that needs to be adjusted S Determined by the following method: Using numerical simulation methods, different window opening areas were simulated under the condition that the pressure difference across the window remained constant. Sc airflow Q m 3 / s; Based on the law of ventilation resistance, the opening area of ​​different windshields is obtained. Sc equivalent wind resistance value R , N·s 2 / m 8 The formula for calculating ventilation resistance is: ; In formula (ii): h The pressure difference across the windshield, in Pa, is measured directly by a differential pressure sensor; the windshield opening area is obtained through data fitting. Sc With equivalent wind resistance value R Relationship: ; From equations (ii) and (iii), the opening area of ​​the windshield is obtained. Sc The calculation formula is as follows: ; One scenario for adjusting ventilation windows in underground coal mines is to ensure that the airflow at the window installation location meets the required airflow. This is achieved by adjusting the window opening area when the pressure difference across the window changes. Sc This keeps the airflow through the window constant, that is: ; In formula (5) h 1 represents the pressure difference across the windshield before the change, as monitored by the differential pressure sensor. Sc 1 represents the current opening area of ​​the windshield; in formula (VI) h 2 represents the current pressure difference across the windshield as monitored by the differential pressure sensor. Sc 2 represents the opening area of ​​the window after adjustment; therefore, the area that the window needs to be adjusted is... During the adjustment process of the air vent, it is first necessary to set a clear air demand, supply-demand ratio, and adjustment ratio for the installed air vent, with the adjustment ratio falling within the supply-demand ratio range; the above calculations determine the area of ​​the air vent that needs to be adjusted. S The pressure difference across the current windshield changes with the windshield adjustment; therefore, after the windshield adjustment is complete, the system needs to calculate and correct the current airflow of the windshield according to a variation of formula (IV). The variation of formula (IV) is as follows: ; If the airflow is within the supply-demand ratio range, the adjustment is complete; if it is not within this range, the area of ​​the ventilator that needs adjustment is repeated. S The calculation process continues until the air volume is within the supply-demand ratio range.

[0008] Alternatively, another scenario for adjusting ventilation windows in underground coal mines is: adjusting the pressure difference across the ventilation window. h When the required airflow at the installation location of the window changes, assuming the airflow remains constant, it is necessary to increase or decrease the airflow of the window by adjusting the window opening area. Sc Control the airflow through the window, that is: ; In Equations (8) and (9) Q 1. Q 2. The required airflow for the ventilation window changes. Sc 3. Sc 4. If the window area changes, then the area of ​​the window needs to be adjusted. Similarly, during window adjustment, the pressure difference between the two sides... hThe airflow is constantly changing; therefore, after adjustment, formula (VII) is used for airflow calculation and correction. If the airflow is within the supply-demand ratio range, the adjustment is complete; if it is not within this supply-demand ratio range, the area of ​​the ventilator that needs adjustment is repeated. S The calculation process continues until the air volume is within the supply-demand ratio range.

[0009] Optionally, the lower end of the adjusting plate is threadedly connected to the lead screw, the lower end of the back plate is fixedly provided with a fixing block and a support block, one end of the lead screw is rotatably connected to the fixing block, the other end of the lead screw passes through the support block and is rotatably connected to the support block, and the end of the lead screw away from the fixing block is connected to the electric motor.

[0010] Optionally, the back plate is connected to a crossbeam, and a hanging rail is fixed inside the crossbeam. The hanging rail is equipped with a hanging rail pulley that cooperates with the hanging rail, and the hanging rail pulley is connected to the adjusting plate by bolts.

[0011] Optionally, the MCU control module includes a display module, which is used to convert various digital signals processed by the MCU control module into images for display.

[0012] In summary, this application includes at least one of the following beneficial technical effects: Differential pressure sensors installed on both sides of the windshield collect differential pressure data and upload it to the MCU control module. The MCU control module calculates the windshield adjustment amount and sends the adjustment command to the drive component to achieve precise adjustment of the windshield opening area. By precisely calculating the adjustment amount through the MCU control module, combined with the reduction ratio of the geared electric motor and pulse signals, the action of the actuator is precisely controlled to achieve precise control of the airflow through the ventilation window, thereby completing the rapid and precise regulation of the airflow through the mine ventilation window to meet the real-time air adjustment needs of the underground ventilation system. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of a high-precision automatic adjustable ventilation window in a mine, according to an embodiment of this application.

[0014] Figure 2 This diagram aims to highlight the structure of the adjustment plate and the back plate.

[0015] Figure 3 This diagram aims to highlight the connection between the hanging rail and the hanging rail pulley.

[0016] Figure 4 This diagram aims to highlight the structure of the adjusting plate and the limiting slide rail.

[0017] Figure 5 This is a system connection diagram of the MUC control module.

[0018] Figure 6It is a fitted curve of the windshield opening area and wind resistance value.

[0019] Figure 7 This is a flowchart illustrating the airflow adjustment process.

[0020] Explanation of reference numerals in the attached diagram: 1. Back plate; 2. Crossbeam; 3. Crossbeam slot; 4. Two-way bolt; 5. Screw hole; 6. Adjusting plate; 7. Adjusting plate reinforcing rib; 8. Connecting piece; 9. Limiting pulley; 10. Limiting slide rail; 11. Slide rail base; 12. Fixing block; 13. Lead screw nut seat; 14. Lead screw; 15. Support block; 16. Coupling; 17. Electric motor; 18. Electric motor base; 19. Back plate reinforcing rib; 20. Hanging rail track; 21. Hanging rail pulley; 22. Electrical control box; 23. MCU control module; 24. Sensing module; 25. Communication module; 26. Display module. Detailed Implementation

[0021] The present application will be further described in detail below with reference to all the accompanying drawings.

[0022] This application discloses a high-precision automatic adjustable ventilation window for mines. Example

[0023] Reference Figure 1 and Figure 2 A high-precision automatic adjustable ventilation window for mines includes a back plate 1 and an adjusting plate 6. The back plate 1 has ventilation windows. The back plate 1 can be fixed to the air door (not shown in the figure) using bolts through the screw holes 5 at the four corners, or fixed to the windbreak wall (not shown in the figure) using expansion bolts. The back plate 1 is fixed with back plate reinforcing ribs 19. Before installing the back plate 1, an opening needs to be made in the air door or windbreak wall, and the opening size is slightly larger than the opening size of the back plate.

[0024] Reference Figure 3 and Figure 4 A slide rail base 11 is fixedly connected to the lower end of the back plate 1 along its length. A limit slide rail 10 is fixed to the slide rail base 11. A limit pulley 9 that cooperates with the limit slide rail 10 is provided at the lower end of the adjusting plate 6. The limit slide rail 10 limits the limit pulley 9 to ensure that the adjusting plate 6 moves in the horizontal direction. A crossbeam slot 3 is fixedly connected to the upper end of the back plate 1. A crossbeam 2 is fixed to the upper end of the back plate through the crossbeam slot 3. A hanging rail 20 is fixed inside the crossbeam 2. A hanging rail pulley 21 that is rollingly connected to the hanging rail 20 is provided inside the hanging rail 20. The hanging rail pulley 21 is connected to the adjusting plate 6 through a two-way bolt 4 to limit the upper end of the adjusting plate 6.

[0025] Reference Figure 1The back plate 1 is provided with a drive assembly for realizing the horizontal movement of the adjustment plate 6. The drive assembly includes a lead screw 14 and an electric motor 17. The electric motor 17 is fixed on the electric motor base 18, and the electric motor base 18 is fixed on the back plate 1 by bolts. Reference Figure 1 and Figure 5 The back panel 1 is equipped with an electrical control box 22, which includes an MCU control module 23, a sensing module 24, and a communication module 25. The MCU control module 23 is electrically connected to the sensor module 24, the communication module 25 and the electric motor 17 respectively. The MCU control module 23 is used to calculate the accurate windshield adjustment amount through the windshield area calculation formula, and convert the digital signal into an electrical signal and transmit it to the electric motor 17, which then performs the adjustment action. The sensing module 24 includes differential pressure sensors installed on both sides of the windshield. The differential pressure sensors are used to monitor the differential pressure values ​​on both sides of the windshield and upload them to the MCU control module 23. Communication module 25 is used to receive control commands from MCU control module 23 and record the received data; The MCU control module 23 includes a display module 26, which is used to convert various digital signals processed by the MCU control module 23 into images for display. The display module can be a display screen, which can intuitively display data images.

[0026] Reference Figure 1 and Figure 2 The adjusting plate 6 has a reinforcing rib 7 fixed in the middle and a connecting piece 8 fixedly connected to its lower end. The lead screw 14 is fitted with a lead screw nut seat 13, and the connecting piece 8 is fixedly connected to the lead screw nut seat 13. The lead screw nut seat 13 is threadedly connected to the lead screw 14. A fixing block 12 and a support block 15 are fixedly provided at the lower end of the back plate 1, and the fixing block 12 and support block 15 are located on the same horizontal line. One end of the lead screw 14 is rotatably connected to the fixing block 12, and the other end of the lead screw 14 passes through and is rotatably connected to the support block 15. The end of the lead screw 14 away from the fixing block 12 is connected to the output shaft of the electric motor 17 via a coupling 16. When the electric motor 14 is working, the output shaft of the electric motor 14 rotates, driving the lead screw 14 to rotate, causing the adjusting plate 6 to move horizontally, thereby adjusting the opening area of ​​the windshield.

[0027] Reference Figure 5 The differential pressure sensors installed on both sides of the windshield collect differential pressure data and upload it to the MCU control module 23. The MCU control module 23 calculates the windshield adjustment amount and sends the adjustment command to the drive component to achieve precise adjustment of the windshield opening area.

[0028] Reference Figure 1 and Figure 5When calculating the windshield adjustment amount, the MCU control module 23 uses a geared electric motor 17 with a rotary encoder, and the gear ratio of the geared electric motor is [missing information]. n 1. The rotary encoder generates 1 unit of power per revolution. x For every pulse, the rotary encoder generates a total of [number] pulses per revolution of the output shaft of the geared electric motor. nx One pulse; simultaneously, the pitch of lead screw 14 is... y (m); then for every revolution of the output shaft of the geared electric motor, the lead of the lead screw 14 is... y (m); Each pulse represents a lead of 14 on the leadscrew. y / nx (m); Window opening height is H (m); the area that the ventilation window needs to adjust is S , (m 2 Then the distance that the adjusting plate 6 needs to move is: S / H (m); The precise adjustment of the windshield opening area is achieved by controlling the number of pulses generated by the geared electric motor; the number of pulses required for the geared electric motor to operate is: ; Area of ​​the window that needs to be adjusted S , (m 2 ); determined by the following method: Reference Figure 6 Fluent numerical simulation software can be used to simulate different windshield opening areas while keeping the pressure difference across the windshield constant. Sc air volume Q As shown in Table 1; Fluent is a very common computational fluid dynamics software, suitable for complex engineering scenarios that require accurate simulation of fluid flow, heat transfer, chemical reactions, and multiphysics coupling. It takes the basic equations of fluid dynamics (continuity equation, momentum equation, energy equation) as its core, and uses the finite volume method to discretize the continuous fluid domain into a finite number of control volumes, transforming partial differential equations into a system of discrete algebraic equations; Sc The unit is m 2 ; Q The unit is m 3 / s; Table 1: Numerical Simulation Data of Window Ventilation under Different Operating Conditions Based on the law of ventilation resistance, the opening area of ​​different wind vents can be obtained. Sc equivalent wind resistance value R , (N·s 2 / m 8 The formula for calculating ventilation resistance is: ; In formula (ii): hThe pressure difference across the windshield (Pa) is measured directly by a differential pressure sensor; the windshield opening area can be obtained using Origin data analysis and fitting software. Sc With equivalent wind resistance value R Relationship: ; Origin is a widely used data management, analysis, and fitting software that can fit function models; from equations (ii) and (iii), the window opening area is obtained. Sc The calculation formula is as follows: ; Reference Figure 7 One scenario for adjusting ventilation windows in underground coal mines is to ensure that the airflow at the window installation location meets the required airflow. This is achieved by adjusting the window opening area when the pressure difference across the window changes. Sc This keeps the airflow through the window constant, that is: ; In formula (5) h 1 represents the pressure difference across the windshield before the change, as monitored by the differential pressure sensor. Sc 1 represents the current opening area of ​​the windshield; in formula (VI) h 2 represents the current pressure difference across the windshield as monitored by the differential pressure sensor. Sc 2 represents the opening area of ​​the window after adjustment; therefore, the area that the window needs to be adjusted is... During the adjustment process of the air vent, it is first necessary to set a clear air demand, supply-demand ratio, and adjustment ratio for the installed air vent, with the adjustment ratio falling within the supply-demand ratio range; the above calculations determine the area of ​​the air vent that needs to be adjusted. S The pressure difference across the current windshield changes with the windshield adjustment; therefore, after the windshield adjustment is complete, the system needs to calculate and correct the current airflow of the windshield according to a variation of formula (IV). The variation of formula (IV) is as follows: ;(seven) If the airflow is within the supply-demand ratio range, the adjustment is complete; if it is not within this range, the area of ​​the ventilator that needs adjustment is repeated. S The calculation process continues until the air volume is within the supply-demand ratio range.

[0029] Another scenario for adjusting ventilation windows in underground coal mines involves pressure differences on both sides of the ventilation window. h When the required airflow at the installation location of the window changes, assuming the airflow remains constant, it is necessary to increase or decrease the airflow of the window by adjusting the window opening area. Sc Control the airflow through the window, that is:

[0030] In Equations (8) and (9)Q 1. Q 2. The required airflow for the ventilation window changes. Sc 3. Sc 4. If the window area changes, then the area of ​​the window needs to be adjusted. Similarly, during window adjustment, the pressure difference between the two sides... h The airflow is constantly changing; therefore, after adjustment, formula (VII) is used for airflow calculation and correction. If the airflow is within the supply-demand ratio range, the adjustment is complete; if it is not within this supply-demand ratio range, the area of ​​the ventilator that needs adjustment is repeated. S The calculation process continues until the air volume is within the supply-demand ratio range.

[0031] The MCU control module 23 accurately calculates the adjustment amount, and combined with the reduction ratio of the geared electric motor and pulse signals, it precisely controls the action of the actuator to achieve precise control of the airflow through the ventilation window, thereby completing the rapid and precise regulation of the airflow through the mine ventilation window to meet the real-time air adjustment needs of the underground ventilation system.

[0032] The implementation principle of a high-precision automatic adjustable ventilation window in a mine according to an embodiment of this application is as follows: Differential pressure sensors installed on both sides of the ventilation window collect differential pressure data and upload it to the MCU control module 23. The MCU control module 23 calculates the ventilation window adjustment amount and sends the adjustment command to the drive component to achieve precise adjustment of the ventilation window opening area. The MCU control module 23 accurately calculates the adjustment amount and, combined with the reduction ratio of the geared electric motor and pulse signals, precisely controls the action of the actuator to achieve precise control of the ventilation window airflow, thereby completing the rapid and precise regulation of the ventilation window airflow in the mine to meet the real-time ventilation adjustment needs of the underground ventilation system.

[0033] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; 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. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0034] In the description of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0035] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example 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.

[0036] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A high-precision automatic adjustable ventilation window for mines, comprising a back plate (1) and an adjusting plate (6), characterized in that: The back plate (1) has a ventilation window, and a limiting slide rail (10) is fixed at the lower end of the back plate (1) along the length direction. The lower end of the adjusting plate (6) is provided with a limiting pulley (9) that cooperates with the limiting slide rail (10). The back plate (1) is provided with a drive assembly to realize the horizontal movement of the adjusting plate (6). The drive assembly includes a lead screw (14) and an electric motor (17). The back panel (1) is equipped with an electrical control box (22), which includes an MCU control module (23), a sensing module (24), and a communication module (25); among which, The MCU control module (23) is electrically connected to the sensing module (24), the communication module (25) and the electric motor (17) respectively. The MCU control module (23) is used to calculate the accurate windshield adjustment amount through the windshield area calculation formula, and convert the digital signal into an electrical signal and transmit it to the electric motor (17), which then performs the adjustment action. The sensing module (24) includes differential pressure sensors installed on both sides of the windshield. The differential pressure sensors are used to monitor the differential pressure value on both sides of the windshield and upload it to the MCU control module (23). The communication module (25) is used to receive control commands from the MCU control module (23) and record the received data.

2. The high-precision automatic adjustable ventilation window for mines according to claim 1, characterized in that: When calculating the windshield adjustment amount, the MCU control module (23) uses a geared electric motor (17) with a rotary encoder, and the gear ratio of the geared electric motor is [value missing]. n 1. The rotary encoder generates 1 unit of power per revolution. x For every pulse, the rotary encoder generates a total of [number] pulses per revolution of the output shaft of the geared electric motor. nx One pulse; simultaneously, the lead screw pitch is y m; then for every revolution of the output shaft of the geared electric motor, the lead of the lead screw (14) is y m; the lead of the lead screw (14) represented by each pulse is y / nx m; the height of the windshield opening is H m; the area that the windshield needs to be adjusted is S m 2 The distance the adjusting plate needs to move is: S / H , m; The window opening area is precisely adjusted by controlling the number of pulses generated by the deceleration electric motor (17); The number of pulses required for the deceleration electric motor (17) to operate is: ； Area of ​​the window that needs to be adjusted S Determined by the following method: Using numerical simulation methods, different window opening areas were simulated under the condition that the pressure difference across the window remained constant. Sc airflow Q m 3 / s; Based on the law of ventilation resistance, the opening area of ​​different windshields is obtained. Sc equivalent wind resistance value R , N·s 2 / m 8 The formula for calculating ventilation resistance is: ； In formula (ii): h The pressure difference across the windshield, in Pa, is measured directly by a differential pressure sensor; the windshield opening area is obtained through data fitting. Sc With equivalent wind resistance value R Relationship: ； From equations (ii) and (iii), the opening area of ​​the windshield is obtained. Sc The calculation formula is as follows: ； One scenario for adjusting ventilation windows in underground coal mines is to ensure that the airflow at the window installation location meets the required airflow. This is achieved by adjusting the window opening area when the pressure difference across the window changes. Sc This keeps the airflow through the window constant, that is: ； In formula (5) h 1 represents the pressure difference across the windshield before the change, as monitored by the differential pressure sensor. Sc 1 represents the current opening area of ​​the windshield; in formula (VI) h 2 represents the current pressure difference across the windshield as monitored by the differential pressure sensor. Sc 2 represents the opening area of ​​the window after adjustment; therefore, the area that the window needs to be adjusted is... During the adjustment process of the air vent, it is first necessary to set a clear air demand, supply-demand ratio, and adjustment ratio for the installed air vent, with the adjustment ratio falling within the supply-demand ratio range; the above calculations determine the area of ​​the air vent that needs to be adjusted. S The pressure difference across the current windshield changes with the windshield adjustment; therefore, after the windshield adjustment is complete, the system needs to calculate and correct the current airflow of the windshield according to a variation of formula (IV). The variation of formula (IV) is as follows: ; If the airflow is within the supply-demand ratio range, the adjustment is complete; if it is not within this range, the area of ​​the ventilator that needs adjustment is repeated. S The calculation process continues until the air volume is within the supply-demand ratio range.

3. The high-precision automatic adjustable ventilation window for mines according to claim 2, characterized in that: Another scenario for adjusting ventilation windows in underground coal mines involves pressure differences on both sides of the ventilation window. h When the required airflow at the installation location of the window changes, assuming the airflow remains constant, it is necessary to increase or decrease the airflow of the window by adjusting the window opening area. Sc Control the airflow through the window, that is: ； In Equations (8) and (9) Q 1. Q 2. The required airflow for the ventilation window changes. Sc 3. Sc 4. If the window area changes, then the area of ​​the window needs to be adjusted. Similarly, during window adjustment, the pressure difference between the two sides... h The airflow is constantly changing; therefore, after adjustment, formula (VII) is used for airflow calculation and correction. If the airflow is within the supply-demand ratio range, the adjustment is complete; if it is not within this supply-demand ratio range, the area of ​​the ventilator that needs adjustment is repeated. S The calculation process continues until the air volume is within the supply-demand ratio range.

4. The high-precision automatic adjustable ventilation window for mines according to claim 1, characterized in that: The lower end of the adjusting plate (6) is threaded to the lead screw (14). The lower end of the back plate (1) is fixed with a fixing block (12) and a support block (15). One end of the lead screw (14) is rotatably connected to the fixing block (12). The other end of the lead screw (14) passes through the support block (15) and is rotatably connected to the support block (15). The end of the lead screw (14) away from the fixing block (12) is connected to the electric motor (17).

5. A high-precision automatic adjustable ventilation window for mines according to claim 1, characterized in that: The back plate (1) is connected to a crossbeam (2), and a hanging rail (20) is fixed inside the crossbeam (2). A hanging rail pulley (21) that cooperates with the hanging rail (20) is provided inside the hanging rail (20). The hanging rail pulley (21) is connected to the adjusting plate (6) by bolts.

6. A high-precision automatic adjustable ventilation window for mines according to claim 1, characterized in that: The MCU control module (23) also includes a display module (26), which is used to convert various digital signals processed by the MCU control module (23) into images for display.

Images