Mining air window capable of preventing gas accumulation

Abstract

The invention provides a mine air window capable of preventing gas accumulation, and relates to the technical field of mine ventilation, the mine air window comprises an air window frame, a power driving assembly and a roller shutter, the air window frame is provided with a mounting cavity and is suitable for being connected with an underground air port; the power driving assembly is connected with the air window frame and located in the installation cavity, the power driving assembly is in transmission connection with the roller shutter, and the roller shutter is movably installed in the installation cavity and is provided with a first position for blocking the installation cavity and a second position for opening the installation cavity so as to change the opening degree of the air window. By adjusting the opening condition of the roller shutter at the underground air port, the ventilation requirement of an underground air using place can be rapidly met, the sealing area is reduced, and the air leakage rate is lower.

Description

Technical Field

[0001] The invention relates to the technical field of mine ventilation, and in particular to a mine-used wind window for preventing gas accumulation. Background Art

[0002] Coal mine underground ventilation is one of the most important technical means to ensure mine production safety. With the continuous development and changes in the production process, the tunnel wind resistance, network structure and required air volume are constantly changing when the working face is advancing and replacing. The natural distribution of tunnel air volume often cannot meet the air volume requirements of the work site, so the underground tunnel network must be adjusted in time. Air volume adjustment is a regular task in the technical management of underground ventilation in coal mines, which has a significant impact on mine production safety and ventilation energy consumption.

[0003] In the related art, a fan blade opening and closing structure is often installed at the wind window to adjust the air volume in the alley. However, the structure has a single function of adjusting the air volume and has strong limitations in use. In addition, in order to ensure the sealing performance of the wind window, a large sealing area is required. Summary of the invention

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

[0005] To this end, an embodiment of the present invention proposes a mine-use anti-gas accumulation type wind window, which can quickly meet the ventilation needs of underground air-using places by adjusting the opening of the roller shutter at the underground air outlet, reducing the sealing area and lowering the air leakage rate.

[0006] According to an embodiment of the present invention, a mine-used anti-gas accumulation wind window includes a wind window frame, a power drive component and a roller shutter, wherein the wind window frame has an installation cavity and is suitable for being connected to an underground air outlet; the power drive component is connected to the wind window frame and is located in the installation cavity, the power drive component is connected to the roller shutter transmission, the roller shutter is movably installed in the installation cavity and has a first position for blocking the installation cavity and a second position for opening the installation cavity, so as to change the opening of the wind window.

[0007] According to the embodiment of the present invention, the mine-used anti-gas accumulation wind window is composed of a wind window frame, a power drive component and a roller shutter that cooperate with the wind window frame installation cavity to form the wind window structure of the present invention, wherein the use state of the roller shutter in the installation cavity can be changed by the power drive component to achieve full-area opening, partial opening or complete closing of the wind window, so as to match the different requirements of the underground wind place for the air volume, improve the flexibility of adjusting the air volume, and make the wind window more applicable. At the same time, due to the structural characteristics of the roller shutter itself, when the wind window is closed, there is only a connecting gap between it and the wind window frame, so the required sealing area is small. Compared with the related technology, the present invention can quickly meet the ventilation needs of the underground wind place by adjusting the opening of the roller shutter at the underground air outlet, thereby reducing the sealing area and lowering the air leakage rate.

[0008] In some embodiments, the wind window further includes a position sensor, which is mounted on either the wind window frame or the power drive assembly, and is used to detect the movement of the roller blind in order to adjust the opening of the wind window.

[0009] In some embodiments, the power drive assembly includes a cover, the cover is connected to the windshield frame and is located in the installation cavity, the cover divides the installation cavity into a first cavity and a second cavity along the height direction, the first cavity is located below the second cavity and is used to accommodate the rolling curtain;

[0010] The wind window also includes a shutter closing structure, which is movably connected to the wind window frame and is located in the second chamber. The shutter closing structure is suitable for blocking or opening the second chamber to block wind or discharge gas.

[0011] In some embodiments, the shutter closure structure is pivotally mounted in the second chamber;

[0012] The shutter closing structure includes a first motor, a rotating shaft and fan blades. The first motor is installed on any one of the wind window frame and the cover shell. The first motor is transmission-connected to the rotating shaft. The fan blades are installed on the rotating shaft. At least part of the fan blades is suitable for blocking the second chamber.

[0013] In some embodiments, the shutter closing structure further includes an angle sensor, wherein the angle sensor is connected to the rotating shaft, and the angle sensor is used to detect the rotation angle of the rotating shaft to determine the opening of the second chamber.

[0014] In some embodiments, the housing has an equipment cavity, and the power drive assembly further includes a second motor and a reel installed in the equipment cavity, wherein the second motor is drivingly connected to the reel;

[0015] The rolling blind has a first end and a second end arranged opposite to each other along the height direction, the first end of the rolling blind is connected to the rolling shaft, the height of the second end of the rolling blind in the first position is lower than that in the second position, and the rolling blind is suitable for being wound on the rolling shaft.

[0016] In some embodiments, the power drive assembly also includes a guide rail, two of which are arranged in the first chamber at intervals along a first direction, the first direction being perpendicular to the height direction, the guide rail being connected to the wind window frame and having a guide groove, the rolling curtain being slidably connected to the guide groove along the height direction, and the cover shell, the wind window frame and the two guide rails jointly define an adjustable area for accommodating the rolling curtain.

[0017] In some embodiments, the wind window further includes a first sealing structure, which is sandwiched between the guide groove and the rolling curtain to seal the first chamber.

[0018] In some embodiments, the first sealing structure is a sealing strip, and the first sealing structure extends along the height direction.

[0019] In some embodiments, the wind window frame includes a frame and a middle beam, the frame is formed around the installation cavity, the middle beam is connected to the frame, and at least one of the cover shell and the roller blind is arranged along a second direction with the middle beam, and the second direction is perpendicular to both the first direction and the height direction.

[0020] In some embodiments, the middle beam includes a first beam and a second beam that are connected, the first beam is connected to the frame along the height direction, and the second beam is connected to the frame along the first direction.

[0021] In some embodiments, the rolling curtain includes a plurality of curtain pieces, any two adjacent curtain pieces are flexibly connected, and all the curtain pieces can be arranged in sequence along the height direction to completely close the first chamber;

[0022] The windshield further comprises a second sealing structure, which is mounted on the curtain piece at the end. When the rolling curtain is in the first position, the second sealing structure abuts against the windshield frame to seal the first chamber.

[0023] In some embodiments, the second sealing structure is a sealing strip, and the second sealing structure extends along the first direction.

[0024] In some embodiments, the wind window further includes a main control unit, and the position sensor, the first motor, the angle sensor and the second motor are all electrically connected to the main control unit.

[0025] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic structural diagram of a mine-used anti-gas accumulation wind window according to an embodiment of the present invention.

[0027] Figure 2 It is an exploded view of the connection structure among a power drive assembly, a roller shutter, a first sealing structure and a second sealing structure in a mine gas accumulation prevention windshield according to an embodiment of the present invention.

[0028] Figure 3 It is a structural schematic diagram of the shutter closing structure part of the mine gas accumulation prevention wind window according to an embodiment of the present invention (the first motor is removed in the figure).

[0029] Figure 4 The present invention is a block diagram of the control relationship between the main control unit and various electrical components in a mine gas accumulation prevention windshield according to an embodiment of the present invention.

[0030] Figure numerals: 1. Wind window frame, 11. Frame, 12. Middle beam, 121. First beam, 122. Second beam, 2. Power drive assembly, 21. Cover, 22. Second motor, 23. Reel, 24. Guide rail, 241. Guide groove, 3. Roller shutter, 4. Position sensor, 5. Shutter closing structure, 51. First motor, 52. Rotating shaft, 53. Fan blade, 54. Angle sensor, 6. First sealing structure, 7. Second sealing structure, 8. Main control unit. DETAILED DESCRIPTION

[0031] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0032] like Figure 1 As shown, a mine-used anti-gas accumulation wind window according to an embodiment of the present invention comprises a wind window frame 1, a power drive assembly 2 and a roller shutter 3. The wind window frame 1 has an installation cavity and is suitable for being connected to an underground air outlet; the power drive assembly 2 is connected to the wind window frame 1 and is located in the installation cavity, the power drive assembly 2 is transmission-connected to the roller shutter 3, the roller shutter 3 is movably installed in the installation cavity and has a first position for blocking the installation cavity and a second position for opening the installation cavity, so that the roller shutter 3 can be driven by the power drive assembly 2 to be wound or unfolded, and the shielding area of ​​the roller shutter 3 to the installation cavity is adjusted to change the opening of the wind window.

[0033] It can be understood that the mine gas accumulation prevention wind window according to the embodiment of the present invention is composed of a wind window frame 1, a power drive component 2 and a roller shutter 3 that are matched in the installation cavity of the wind window frame 1, forming the wind window structure of the present invention, wherein the use state of the roller shutter 3 in the installation cavity can be changed by the power drive component 2, so as to realize the full-area opening, partial opening or complete closing of the wind window, so as to match the different requirements of the underground wind place for the air volume, improve the flexibility of adjusting the air volume, and make the wind window more applicable. At the same time, due to the structural characteristics of the roller shutter 3 itself, when the wind window is closed, there is only a connecting gap between it and the wind window frame 1, so the required sealing area is small. Compared with the related technology, the present invention can quickly meet the ventilation needs of the underground wind place by adjusting the opening of the roller shutter 3 at the underground air outlet, thereby reducing the sealing area and lowering the air leakage rate.

[0034] It should be noted that since the roller blind 3 itself is a complete sheet, when closing the wind window, it is easy to form a contact gap at the junction of the edge of the roller blind 3 and the wind window frame 1. By sealing the contact gap, the sealing performance of the wind window can be ensured. Therefore, compared with the fan blade opening and closing structure in the related technology, the required sealing area is smaller and it is not easy to leak air.

[0035] like Figure 1 and Figure 4 As shown, in some embodiments, the wind window further includes a position sensor 4, which is mounted on either the wind window frame 1 or the power drive assembly 2, and is used to detect the movement of the roller blind 3 so as to adjust the opening of the wind window.

[0036] It is understandable that in order to ensure the opening accuracy of the wind window, the displacement position information of the roller blind 3 can be obtained by using a position sensor 4 arranged on the movement stroke of the roller blind 3, so as to control the working condition of the power drive component 2 according to the position information, limit the displacement of the roller blind 3, and thus accurately adjust the opening of the wind window to achieve the purpose of wind adjustment.

[0037] like Figure 1 and Figure 2 As shown, in some embodiments, the power drive assembly 2 includes a cover 21, which is connected to the windshield frame 1 and is located in the installation cavity. The cover 21 divides the installation cavity into a first chamber and a second chamber along the height direction. The first chamber is located below the second chamber and is used to accommodate the roller blind 3.

[0038] The wind window further comprises a shutter closing structure 5, which is movably connected to the wind window frame 1 and is located in the second chamber. The shutter closing structure 5 is suitable for blocking or opening the second chamber to block wind or discharge gas.

[0039] It can be understood that the roller shutter 3 can open the wind window over a larger area, and a shutter closing structure 5 is arranged above the roller shutter 3 to form an independent opening space. When gas accumulates near the cover 21, ventilation can be carried out by opening the shutter closing structure 5 to prevent gas accumulation. When a small adjustment of the air flow is required, the shutter closing structure 5 can also be opened first for ventilation to make the air adjustment process more flexible and meet the different conditions of different mines and different tunnels.

[0040] Specifically, the height direction can be the up-down direction in the figure. The shutter closing structure 5, the cover 21 and the roller blind 3 are arranged in sequence from top to bottom. The cover 21 is located in the equipment space of the wind window frame 1. The first chamber is also the adjustable space that can adjust the ventilation area of ​​the wind window. The second chamber is also the gas exhaust space of the wind window frame 1. In other words, the wind window frame 1 is provided with a gas exhaust space, an equipment space and an adjustable space in sequence from top to bottom.

[0041] It should be noted that during coal mining, gas is easily accumulated at the cover 21 because of the wind blocking. Therefore, a second chamber and a shutter closing structure 5 are designed above the cover 21 to prevent gas accumulation by ventilating the second chamber.

[0042] like Figure 1 and Figure 3 As shown, in some embodiments, the shutter closing structure 5 is pivotally installed in the second chamber, that is, the shutter closing structure 5 is rotatably installed in the gas exhaust space.

[0043] The shutter closing structure 5 includes a first motor 51, a rotating shaft 52 and a fan blade 53. The first motor 51 is installed on either the windshield frame 1 or the cover 21. The first motor 51 is transmission-connected to the rotating shaft 52. The fan blade 53 is installed on the rotating shaft 52. At least a portion of the fan blade 53 is suitable for blocking the second chamber.

[0044] It can be understood that the fan blades 53 are driven by the first motor 51 to rotate, so that the gas exhaust space can be opened and closed, so that when gas accumulates in the cover shell 21 due to wind blocking, the gas exhaust space can be opened for ventilation, with a simple structure and easy operation.

[0045] like Figure 1 , Figure 3 and Figure 4 As shown, in some embodiments, the shutter closing structure 5 further includes an angle sensor 54, which is connected to the rotating shaft 52. The angle sensor 54 is used to detect the rotation angle of the rotating shaft 52 to determine the opening of the second chamber.

[0046] It can be understood that the angle sensor 54 can record the rotation angle of the fan blade 53, thereby determining the opening of the gas exhaust space to achieve more accurate air adjustment processing.

[0047] like Figure 1 and Figure 2 As shown, in some embodiments, the housing 21 has an equipment cavity, and the power drive assembly 2 further includes a second motor 22 and a reel 23 installed in the equipment cavity, and the second motor 22 is transmission-connected to the reel 23 .

[0048] The roller blind 3 has a first end and a second end arranged opposite to each other in the height direction. The first end of the roller blind 3 is connected to the winding shaft 23. The height of the second end of the roller blind 3 in the first position is lower than that in the second position. The roller blind 3 is suitable for being wound on the winding shaft 23.

[0049] It can be understood that the second motor 22 and the reel 23 are installed in the cover 21, which can effectively reduce the erosion of the external environment to the equipment and close the equipment space, and the second motor 22 can drive the reel 23 to rotate, so that the roller blind 3 is rolled up or unrolled on the reel 23 to control the lifting and lowering of the roller blind 3, realize the wind window wind adjustment function, and flexibly adjust the ventilation area of ​​the wind window over a large area. At the same time, because the roller blind 3 can be completely rolled up on the reel 23 and located in the cover 21, the space occupancy is reduced, and the maximum ventilation area of ​​the wind window is further widened.

[0050] Specifically, the first end of the rolling curtain 3 corresponds to the upper end of the rolling curtain 3 in the figure. The second end of the rolling curtain 3 corresponds to the lower end of the rolling curtain 3 in the figure.

[0051] like Figure 2 As shown, in some embodiments, the power drive assembly 2 also includes a guide rail 24, two of which are arranged in the first chamber at intervals along a first direction, the first direction is perpendicular to the height direction, the guide rail 24 is connected to the windshield frame 1 and has a guide groove 241, the roller blind 3 is slidably connected to the guide groove 241 along the height direction, and the cover 21, the windshield frame 1 and the two guide rails 24 jointly define an adjustable area for accommodating the roller blind 3.

[0052] It can be understood that when the second motor 22 and the roller 23 pull the roller blind 3 to rise and fall, the guide rail 24 can assist the roller blind 3 to reciprocate in the height direction and limit the position of the roller blind 3 in the front and rear direction in the figure to ensure the reliability of the roller blind 3 to the opening of the wind window.

[0053] Specifically, the first direction may be the left-right direction in the figure. The guide groove 241 may extend in the up-down direction. One of the guide rails 24 is located at the left end of the rolling curtain 3, and the other guide rail 24 is located at the right end of the rolling curtain 3. The rotating shaft 52 and the reel 23 may both extend in the left-right direction. The direction where the pivot axis 52 line of the rotating shaft 52 in the gas exhaust space is located, and the direction where the pivot axis 52 line of the reel 23 in the equipment space is located may both be the first direction.

[0054] like Figure 2As shown, in some embodiments, the wind window further includes a first sealing structure 6, and the first sealing structure 6 is sandwiched between the guide groove 241 and the rolling curtain 3 to seal the first chamber.

[0055] like Figure 2 As shown, in some embodiments, the first sealing structure 6 is a sealing strip, and the first sealing structure 6 extends in the height direction, that is, extends in the up-down direction.

[0056] It can be understood that filling the first sealing structure 6 at the contact position between the guide groove 241 and the roller blind 3 can ensure the sealing performance of the windshield.

[0057] like Figure 1 As shown, in some embodiments, the windshield frame 1 includes a frame 11 and a middle beam 12, the frame 11 surrounds the molded installation cavity, the middle beam 12 is connected to the frame 11, and at least one of the cover 21 and the roller blind 3 is arranged along the second direction with the middle beam 12, and the second direction is perpendicular to both the first direction and the height direction.

[0058] It is understandable that the frame 11 and the middle beam 12 cooperate with each other to ensure the overall structural strength of the windshield frame 1, thereby ensuring the service life of the windshield.

[0059] Specifically, the second direction may be the front-rear direction in the figure. Taking the figure as an example, the middle beam 12 may be located in front of at least one of the cover shell 21 and the roller blind 3 .

[0060] like Figure 1 As shown, in some embodiments, the middle beam 12 includes a first beam 121 and a second beam 122 connected to each other, the first beam 121 is connected to the frame 11 along the height direction, and the second beam 122 is connected to the frame 11 along the first direction. The first beam 121 can extend along the height direction. The second beam 122 can extend along the first direction. Taking the figure as an example, there can be two first beams 121 and they are arranged at intervals along the first direction. The second beam 122 can be located in the middle of the frame 11.

[0061] Specifically, the frame 11 and the middle beam 12 are both formed by sequentially splicing a plurality of profiles.

[0062] like Figure 2 As shown, in some embodiments, the rolling curtain 3 includes a plurality of curtain pieces, any two adjacent curtain pieces are flexibly connected, and all the curtain pieces can be arranged in sequence along the height direction to completely close the first chamber.

[0063] The windshield further comprises a second sealing structure 7 , which is mounted on the curtain piece at the end. When the rolling curtain 3 is in the first position, the second sealing structure 7 abuts against the windshield frame 1 to seal the first chamber.

[0064] It can be understood that the second sealing structure 7 cooperates with the first sealing structure 6 to further ensure the sealing performance of the roller blind 3 to the wind window and reduce the air leakage.

[0065] Specifically, the second sealing structure 7 may also be a sealing strip, and the second sealing structure 7 extends along the first direction.

[0066] like Figure 4 As shown, in some embodiments, the wind window also includes a main control unit 8, and the position sensor 4, the first motor 51, the angle sensor 54 and the second motor 22 are all electrically connected to the main control unit 8. The position sensor 4 and the angle sensor 54 feed back the detected data information to the main control unit 8, so that the main control unit 8 controls the working condition of the first motor 51 according to the feedback position signal, thereby realizing real-time automatic regulation of the lifting action of the roller blind 3, or the main control unit 8 controls the working condition of the second motor 22 according to the feedback angle signal, thereby automatically controlling the opening degree of the fan blade 53 to the gas exhaust space.

[0067] Specifically, the main control unit 8 may be a controller. The specific structure, connection mode and control principle between the controller and the position sensor 4, the first motor 51, the angle sensor 54 and the second motor 22 may adopt the existing technology in the art and will not be elaborated here.

[0068] It can be understood that the present invention has the following advantages:

[0069] 1) By replacing the existing fan blade opening and closing structure with a rolling curtain 3 structure, after the rolling curtain 3 is rolled up, the wind window can be fully opened in the tunnel, quickly meeting the ventilation needs of the underground wind field, and a sealing structure is provided in the guide rail 24, which is closely matched with the rolling curtain 3 to ensure the sealing performance of the wind window. Compared with the existing fan blade 53 structure, the sealing area is reduced and the air leakage rate is lower;

[0070] 2) The power drive assembly 2 of the wind window can obtain the opening and closing parameters of the folding closed structure through the position sensor 4, and accurately adjust the opening of the wind window according to the signal provided by the position sensor 4, so as to achieve quantitative adjustment of the wind window wind area and achieve the purpose of quantitative adjustment of the ventilation volume of the installed laneway;

[0071] 3) The upper part of the wind window is also provided with an independent opening space. When opening, the shutter closing structure 5 is opened for ventilation to prevent gas accumulation. Moreover, when adjusting the wind in a small range, the shutter closing structure 5 can be opened for ventilation first, and the wind adjustment process is more flexible.

[0072] Therefore, this mine-used anti-gas accumulation wind window is one of the ways to realize the intelligent construction of the tunnel safety system, which makes the underground equipment transfer management more accurate, controllable and real-time. Its control form can also adapt to various tunnel forms and can be promoted in various mine tunnels. At the same time, as an intelligent system management model, it also has great promotion and application value.

[0073] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0074] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0075] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0076] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0077] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0078] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A mine-use anti-gas accumulation type wind window, characterized in that: include: A wind window frame, the wind window frame having a mounting cavity and being suitable for being connected to an underground wind port; as well as A power drive assembly and a rolling shutter, wherein the power drive assembly is connected to the wind window frame and is located in the installation cavity, the power drive assembly is connected to the rolling shutter transmission, the rolling shutter is movably installed in the installation cavity and has a first position for blocking the installation cavity and a second position for opening the installation cavity to change the opening of the wind window.

2. The mine-used anti-gas accumulation windshield according to claim 1 is characterized in that: It also includes a position sensor, which is installed on any one of the windshield frame and the power drive assembly. The position sensor is used to detect the movement of the roller blind so as to adjust the opening of the windshield.

3. The mine-used anti-gas accumulation windshield according to claim 1, characterized in that: The power drive assembly includes a cover shell, which is connected to the windshield frame and is located in the installation cavity. The cover shell divides the installation cavity into a first cavity and a second cavity along the height direction. The first cavity is located below the second cavity and is used to accommodate the rolling curtain. The wind window also includes a shutter closing structure, which is movably connected to the wind window frame and is located in the second chamber. The shutter closing structure is suitable for blocking or opening the second chamber to block wind or discharge gas.

4. The mine-used anti-gas accumulation windshield according to claim 3 is characterized in that: The shutter closure structure is pivotally mounted in the second chamber; The shutter closing structure includes a first motor, a rotating shaft and fan blades. The first motor is installed on any one of the wind window frame and the cover shell. The first motor is transmission-connected to the rotating shaft. The fan blades are installed on the rotating shaft. At least part of the fan blades is suitable for blocking the second chamber.

5. The mine-used anti-gas accumulation windshield according to claim 4 is characterized in that: The shutter closing structure also includes an angle sensor, which is connected to the rotating shaft and is used to detect the rotation angle of the rotating shaft to determine the opening of the second chamber.

6. The mine-used anti-gas accumulation windshield according to claim 3, characterized in that: The housing has an equipment cavity, and the power drive assembly further includes a second motor and a reel installed in the equipment cavity, wherein the second motor is drivingly connected to the reel; The rolling blind has a first end and a second end arranged opposite to each other along the height direction, the first end of the rolling blind is connected to the rolling shaft, the height of the second end of the rolling blind in the first position is lower than that in the second position, and the rolling blind is suitable for being wound on the rolling shaft.

7. The mine-used anti-gas accumulation windshield according to claim 6, characterized in that: The power drive assembly also includes a guide rail, two of which are arranged in the first chamber at intervals along a first direction, the first direction is perpendicular to the height direction, the guide rail is connected to the windshield frame and has a guide groove, and the roller blind is slidably connected to the guide groove along the height direction.

8. The mine-used anti-gas accumulation windshield according to claim 7, characterized in that: It also includes a first sealing structure, which is sandwiched between the guide groove and the rolling curtain to seal the first chamber; And / or, the first sealing structure is a sealing strip, and the first sealing structure extends along the height direction.

9. The mine-used anti-gas accumulation windshield according to claim 7, characterized in that: The windshield frame includes a frame and a middle beam, the frame surrounds and forms the installation cavity, the middle beam is connected to the frame, at least one of the cover shell and the roller blind is arranged with the middle beam along a second direction, and the second direction is perpendicular to both the first direction and the height direction; And / or, the middle beam includes a first beam and a second beam that are connected, the first beam is connected to the frame along the height direction, and the second beam is connected to the frame along the first direction.

10. The mine-used anti-gas accumulation windshield according to any one of claims 3 to 9, characterized in that: The rolling curtain comprises a plurality of curtain pieces, any two adjacent curtain pieces are flexibly connected, and all the curtain pieces can be arranged in sequence along the height direction to completely close the first chamber; The windshield further comprises a second sealing structure, which is mounted on the curtain piece at the end. When the rolling curtain is in the first position, the second sealing structure abuts against the windshield frame to seal the first chamber.

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