Ventilation device for coal mining

Abstract

This invention discloses a ventilation device for coal mine mining. The ventilation device includes a bellows, multiple ventilation components, and multiple blower components. The bellows is equipped with a partition to divide its inner cavity into a collecting chamber and multiple blower chambers. The partition has ventilation holes. The bellows is equipped with an outlet pipe communicating with the collecting chamber and an inlet pipe communicating with the blower chambers. The multiple ventilation components are respectively located in the multiple ventilation holes and the multiple inlet pipes. When the ventilation components are open, the blower chamber and the collecting chamber are connected, or the inlet pipe and the blower chamber are connected. When closed, the ventilation components block the connection between the blower chamber and the collecting chamber, or block the connection between the inlet pipe and the blower chamber. The blower components include a pressure plate located in the blower chamber. By moving the pressure plate, outside air is drawn into the blower chamber, and the air in the blower chamber is forced into the collecting chamber to generate a high-pressure airflow, thereby providing high-pressure and rapid ventilation to the roadway or chamber, with a long ventilation distance and a large ventilation volume.

Description

Technical Field

[0001] This invention relates to the field of tunnel ventilation technology, and more particularly to a ventilation device for coal mine mining. Background Technology

[0002] Coal mines are generally divided into underground coal mines and open-pit coal mines. When the coal seam is far from the surface, underground tunnels are typically dug to extract the coal; this is called an underground coal mine. When the coal seam is very close to the surface, the surface soil is typically stripped away to extract the coal; this is called an open-pit coal mine.

[0003] During underground coal mining operations, ventilation is necessary in the tunnels to ensure fresh air for workers to breathe. Timely ventilation also helps remove harmful gases seeping from the mine, preventing respiratory poisoning.

[0004] In related technologies, ventilation methods in coal mines mostly use fans for air supply. However, the power, air supply volume, and air pressure of fans are limited, which is not conducive to long-distance ventilation and multi-pipe air supply. The application scenarios are limited and the effect is not good. Summary of the Invention

[0005] The present invention aims to at least partially solve one of the technical problems in the related art.

[0006] Therefore, embodiments of the present invention propose a ventilation device for coal mine mining to solve the problems in the above-mentioned related technologies where fans are used for air supply, resulting in limited fan power, limited air supply volume, limited air pressure, and unfavorable long-distance ventilation.

[0007] The coal mine ventilation device of this invention includes: a wind box, multiple ventilation components, and multiple blower components. The wind box is provided with a partition to divide its inner cavity into an air collecting chamber and multiple blower chambers. The partition has ventilation holes for communicating between the blower chambers and the air collecting chambers. The wind box is provided with an air outlet pipe communicating with the air collecting chambers. The wind box is also provided with air inlet pipes corresponding to and communicating with each of the multiple blower chambers. The diameters of the air inlet pipes, the ventilation holes, and the air outlet pipes are the same. Multiple ventilation components are respectively disposed within the ventilation holes and the air inlet pipes. Each ventilation component has an open state and a closed state. In the open state, the ventilation component located within the ventilation hole communicates with the blower chamber and the air collecting chamber, and the component located within the air inlet pipe... The ventilation assembly connects the air inlet pipe and the blower chamber. In the closed state, the ventilation assembly located in the ventilation hole blocks the blower chamber and the air collecting chamber, and the ventilation assembly located in the air inlet pipe blocks the air inlet pipe and the blower chamber. The blower assembly includes pressure plates, and multiple pressure plates are respectively and correspondingly disposed in multiple blower chambers. The pressure plates are movable between a first position and a second position to adjust the pressure in the blower chamber. When the pressure in the blower chamber is higher than a preset value, the ventilation assembly located in the ventilation hole is in the open state, and the ventilation assembly located in the air inlet pipe is in the closed state. When the pressure in the blower chamber is lower than the preset value, the ventilation assembly located in the air inlet pipe is in the open state, and the ventilation assembly located in the ventilation hole is in the closed state.

[0008] The coal mine ventilation device of this invention draws outside air into the blower chamber by moving the pressure plate, and forces the air in the blower chamber into the air collection chamber to generate a high-pressure airflow, thereby providing high-pressure and rapid ventilation to the roadway or chamber, with a long ventilation distance and a large ventilation volume.

[0009] In some embodiments, the ventilation assembly includes: a mounting ring, two semi-circular opening and closing plates, and two return springs. The outer peripheral wall of the mounting ring is connected to the wall of the corresponding ventilation hole or the wall of the air inlet pipe. The mounting ring is provided with a connecting rod extending radially along the mounting ring. The two opening and closing plates are disposed opposite to each other on both sides of the connecting rod and are rotatably connected to the connecting rod. The two opening and closing plates are used to jointly block the central through hole of the mounting ring, and the opening and closing plates open unidirectionally along the gas flow direction. The two return springs correspond one-to-one with the two opening and closing plates. One end of the return spring is connected to the connecting rod, and the other end of the return spring is connected to the opening and closing plate so that the unidirectionally opened opening and closing plate returns to its original position.

[0010] In some embodiments, the mounting ring is further provided with two sealing strips that correspond one-to-one with the two opening and closing plates. The sealing strips are arc-shaped and match the opening and closing plates.

[0011] In some embodiments, the blower assembly further includes: an annular rubber diaphragm and a drive component, wherein the inner end of the annular rubber diaphragm is connected to the peripheral wall of the pressure plate, and the outer end of the annular rubber diaphragm is connected to the cavity wall of the blower chamber; the drive component includes a servo motor, a gearbox, an eccentric wheel, and a connecting rod; the servo motor is mounted on the blower box, the output end of the servo motor is connected to the input end of the gearbox, the output end of the gearbox is detachably connected to the eccentric wheel, one end of the connecting rod is movably connected to the eccentric wheel, the connecting rod passes through the blower box, and the other end of the connecting rod is movably connected to the pressure plate.

[0012] In some embodiments, the pressure plate is provided with a plurality of limiting rods, the limiting rods being slidably inserted through the air box in a vertical direction, and the length of the limiting rods being greater than the travel distance of the pressure plate.

[0013] In some embodiments, the coal mine ventilation device further includes a distribution box, the air collection chamber is connected to the inner cavity of the distribution box via the air outlet pipe, the distribution box is provided with a plurality of connecting pipes, the diameter of the connecting pipes is smaller than the diameter of the air outlet pipe, the connecting pipes are detachably provided with caps, the connecting pipes have a connected state and a blocked state, in the blocked state the caps are connected to the connecting pipes, in the connected state the caps are removed from the connecting pipes.

[0014] In some embodiments, the coal mine ventilation device further includes a humidification component, which includes a water tank and a plurality of absorbent cotton boards. The water tank is disposed on the branch box, and the plurality of absorbent cotton boards are spaced apart in the inner cavity of the branch box along a first direction. The absorbent cotton boards are provided with absorbent cotton strips, which pass through the water tank and are connected to the bottom of the water tank.

[0015] In some embodiments, the coal mine ventilation device further includes a guide pipe, which includes a first straight pipe section, a corrugated pipe section, a second straight pipe section, and a guide pipe section connected in sequence. The outlet end of the second straight pipe section is ball-jointed to the inlet section of the guide pipe section. The diameter of the guide pipe section is smaller than the diameter of the connecting pipe. In the connected state, the inlet end of the first straight pipe section is detachably connected to the connecting pipe.

[0016] In some embodiments, the air inlet pipe is provided with an outer pipe, the cross-sectional area of ​​which gradually decreases from upstream to downstream, and a filter screen is provided inside the outer pipe.

[0017] In some embodiments, the bellows is fitted with a mounting bracket having multiple mounting holes so that the bellows can be installed in the tunnel. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a coal mine ventilation device according to an embodiment of the present invention.

[0019] Figure 2 This is a coal mine ventilation device according to an embodiment of the present invention. Figure 1 A magnified structural diagram is shown in section A.

[0020] Figure 3 This is an exploded view of the overall structure of the coal mine ventilation device according to an embodiment of the present invention.

[0021] Figure 4 This is an exploded structural diagram of the ventilation component of a coal mine ventilation device according to an embodiment of the present invention.

[0022] Figure 5 This is a rear-view perspective structural diagram of a coal mine ventilation device according to an embodiment of the present invention.

[0023] Figure 6 This is a cross-sectional view of the air box of the coal mine ventilation device according to an embodiment of the present invention.

[0024] Figure 7 This is a longitudinal sectional view of the air box of the ventilation device for coal mining according to an embodiment of the present invention.

[0025] Figure 8 This is a cross-sectional view of the air duct of the ventilation device for coal mining according to an embodiment of the present invention.

[0026] Figure 9 This is a coal mine ventilation device according to an embodiment of the present invention. Figure 8 Enlarged structural diagram at point B in the middle.

[0027] Figure label:

[0028] Air box 1, partition 11, air outlet duct 12, air inlet duct 13, outer duct 14, filter screen 141, fixing bracket 15, assembly hole 151, air collection chamber 101, blower chamber 102.

[0029] Ventilation assembly 2, mounting ring 21, connecting rod 22, opening and closing plate 23, return spring 24, sealing strip 25.

[0030] Blower assembly 3, pressure plate 31, annular rubber diaphragm 32, servo motor 33, gearbox 34, eccentric wheel 35, connecting rod 36, limit rod 37.

[0031] Branch box 4, connecting pipe 41, cover 42.

[0032] Humidifying component 5, water tank 51, absorbent cotton board 52, absorbent cotton strips 53

[0033] Air duct 6, first straight pipe section 61, corrugated pipe section 62, second straight pipe section 63, guide pipe section 64. Detailed Implementation

[0034] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. 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.

[0035] The following describes a coal mine ventilation device according to an embodiment of the present invention with reference to the accompanying drawings.

[0036] like Figures 1 to 9 As shown, the coal mine ventilation device of this embodiment includes: a wind box 1, multiple ventilation components 2 and multiple blower components 3.

[0037] The bellows 1 is equipped with a partition 11, which divides the inner cavity of the bellows 1 into an air collecting chamber 101 and multiple air blowing chambers 102. Specifically, as shown... Figure 6 As shown, the separator 11 is T-shaped, dividing the inner cavity of the bellows 1 into a front air collecting chamber 101 and two rear air blowing chambers 102, which are arranged side-by-side in the left-right direction. It should be understood that the gas flow direction is... Figure 1 or Figure 6 The direction from back to front.

[0038] The separator 11 is provided with vents for connecting the blower chamber 102 and the air collecting chamber 101, so that the airflow in the multiple blower chambers 102 is collected into the air collecting chamber 101 through the multiple vents. The air box 1 is provided with an air outlet pipe 12 that communicates with the air collecting chamber 101, and the air box 1 is also provided with an air inlet pipe 13 that corresponds to and communicates with each of the multiple blower chambers 102. Specifically, as shown... Figure 1 and Figure 6 As shown, both the air inlet pipe 13 and the air outlet pipe 12 extend in the front-to-back direction. The inlet of the air inlet pipe 13 is connected to the outside, and the outlet of the air outlet pipe 12 is connected to the tunnel or chamber. That is, the airflow enters the blower chamber 102 through the air inlet pipe 13, then flows into the air collection chamber 101, and finally exits the air box 1 through the air outlet pipe 12.

[0039] Furthermore, the diameters of the inlet pipe 13, the vent, and the outlet pipe 12 are the same. It can be understood that if the total volume of air entering the multiple blower chambers 102 through the multiple inlet pipes 13 per unit time is *a*, and the volume of air exiting the blower box 1 through the outlet pipe 12 per unit time is also *a*, then the gas velocity in the outlet pipe 12 is much greater than the gas velocity in the inlet pipes 13. That is, the airflow entering the blower box 1 per unit time is accelerated within the blower box 1 before exiting.

[0040] Furthermore, the cross-sectional area of ​​the air collecting chamber 101 gradually decreases from back to front, so as to gather the airflow entering the air collecting chamber 101 from the multiple blower chambers 102 to the air outlet pipe 12 in the middle of the air collecting chamber 101.

[0041] Multiple ventilation components 2 are respectively disposed within multiple ventilation holes and multiple air inlet pipes 13. In other words, half of the ventilation components 2 are disposed within multiple ventilation holes, and the other half are disposed within air inlet pipes 13. Each ventilation component 2 has an open state and a closed state. In the open state, the ventilation component 2 located within the ventilation hole connects the blower chamber 102 and the air collecting chamber 101, and the ventilation component 2 located within the air inlet pipe 13 connects the air inlet pipe 13 and the blower chamber 102. In the closed state, the ventilation component 2 located within the ventilation hole blocks the blower chamber 102 and the air collecting chamber 101, and the ventilation component 2 located within the air inlet pipe 13 blocks the air inlet pipe 13 and the blower chamber 102.

[0042] In other words, when the ventilation assembly 2 is in the open state, the airflow in the air inlet pipe 13 can enter the blower chamber 102, and the airflow in the blower chamber 102 can enter the collector chamber 101. When the ventilation assembly 2 is in the closed state, the airflow in the air inlet pipe 13 cannot enter the blower chamber 102, and the airflow in the blower chamber 102 cannot enter the collector chamber 101.

[0043] Specifically, such as Figure 6 As shown, there are four ventilation components 2. Two of the four ventilation components 2 are respectively located in two ventilation holes, and the other two ventilation components 2 are respectively located in two air inlet pipes 13.

[0044] The blower assembly 3 includes pressure plates 31, which are respectively disposed in multiple blower chambers 102. The pressure plates 31 are movable between a first position and a second position to adjust the pressure inside the blower chamber 102. When the pressure inside the blower chamber 102 is higher than a preset value (atmospheric pressure), the ventilation assembly 2 located in the vent hole is in the open state, and the ventilation assembly 2 located in the air inlet pipe 13 is in the closed state. When the pressure inside the blower chamber 102 is lower than the preset value, the ventilation assembly 2 located in the air inlet pipe 13 is in the open state, and the ventilation assembly 2 located in the vent hole is in the closed state.

[0045] Optionally, such as Figure 7 As shown, the pressure plate 31 is located in the upper middle part of the blower cavity 102. The pressure plate 31 moves between the first position and the second position in the vertical direction, thereby adjusting the pressure inside the blower cavity 102 by changing the volume of the blower cavity 102.

[0046] Understandably, when the pressure plate 31 moves upward, a negative pressure is formed in the blower chamber 102, causing the ventilation component 2 in the air inlet pipe 13 to be in the open state and the ventilation component 2 in the vent hole to be in the closed state. Air is drawn in through the air inlet pipe 13 to balance the air pressure in the blower chamber 102. When the pressure plate 31 moves downward, a high pressure is formed in the blower chamber 102, causing the ventilation component 2 in the air inlet pipe 13 to be in the closed state and the ventilation component 2 in the vent hole to be in the open state. Air is discharged through the vent hole to balance the air pressure in the blower chamber 102, and the high-pressure airflow is discharged from the air box 1 through the air outlet pipe 12.

[0047] Therefore, the coal mine ventilation device of this embodiment of the invention draws outside air into the blower chamber 102 by moving the pressure plate 31, and forces the air in the blower chamber 102 into the air collection chamber 101 to generate a high-pressure airflow, thereby providing high-pressure and rapid ventilation to the roadway or chamber, with a long ventilation distance and a large ventilation volume.

[0048] In some embodiments, such as Figures 3 to 7 As shown, the ventilation assembly 2 includes: a mounting ring 21, two semi-circular opening and closing plates 23, and two return springs 24. The outer peripheral wall of the mounting ring 21 is connected to the wall of the corresponding ventilation hole or the wall of the air inlet pipe 13. In other words, the outer peripheral wall of the mounting ring 21 inside the ventilation hole is tightly connected to the wall of the ventilation hole, and the outer peripheral wall of the mounting ring 21 inside the air inlet pipe 13 is tightly connected to the wall of the air inlet pipe 13.

[0049] The mounting ring 21 is provided with a connecting rod 22 extending radially along the mounting ring 21. Two opening and closing plates 23 are disposed opposite to each other on both sides of the connecting rod 22 and are rotatably connected to the connecting rod 22. The two opening and closing plates 23 are used to jointly block the central through hole of the mounting ring 21, and the opening and closing plates 23 open unidirectionally along the gas flow direction. Two return springs 24 correspond one-to-one with the two opening and closing plates 23. One end of the return spring 24 is connected to the connecting rod 22, and the other end of the return spring 24 is connected to the opening and closing plate 23 so that the unidirectionally opened opening and closing plate 23 returns to its original position.

[0050] Optionally, such as Figure 4 As shown, the opening and closing plate 23 is located downstream of the mounting ring 21. The diameter of the opening and closing plate 23 is the same as the outer diameter of the mounting ring 21. Under the restriction of the mounting ring 21, the opening and closing plate 23 can only rotate in the direction from upstream to downstream.

[0051] Understandably, when the pressure plate 31 moves upward, a negative pressure is formed in the blower chamber 102. The air pressure (atmospheric pressure) in the air inlet pipe 13 opens the opening plate 23, so that the ventilation component 2 in the air inlet pipe 13 is in the open state. However, the opening plate 23 in the vent hole remains closed under the combined action of the gas pressure in the air collecting chamber 101 and the elastic force of the return spring 24, so that the ventilation component 2 in the vent hole remains in the closed state. When the pressure plate 31 moves downward, a high pressure is formed in the blower chamber 102. The air pressure in the blower chamber 102 opens the opening plate 23 in the vent hole, so that the ventilation component 2 in the vent hole is in the open state. However, the opening plate 23 in the air inlet pipe 13 remains closed under the combined action of the gas pressure in the blower chamber 102 and the elastic force of the return spring 24, so that the ventilation component 2 in the air inlet pipe 13 remains in the closed state. Furthermore, when the air pressure inside the blower chamber 102 is balanced, the open opening and closing plate 23 is closed by the action of the return spring 24.

[0052] Thus, the ventilation assembly 2 enables the pressure plate 31 to move upward for unidirectional air extraction and downward for unidirectional air exhaust.

[0053] Furthermore, the mounting ring 21 is also provided with two sealing strips 25 that correspond one-to-one with the two opening and closing plates 23. The sealing strips 25 are arc-shaped and match the opening and closing plates 23 to ensure the sealing performance when the opening and closing plates 23 are closed.

[0054] In some embodiments, such as Figures 1 to 7 As shown, the blower assembly 3 also includes an annular rubber diaphragm 32 and a drive component.

[0055] like Figure 7 As shown, the inner end of the annular rubber diaphragm 32 is connected to the peripheral wall of the pressure plate 31, and the outer end of the annular rubber diaphragm 32 is connected to the cavity wall of the blower 102, thereby ensuring that the gas in the blower 102 will not leak at the pressure plate 31 during the up and down movement of the pressure plate 31.

[0056] like Figures 1 to 7 As shown, the driving components include a servo motor 33, a gearbox 34, an eccentric wheel 35, and a connecting rod 36. The servo motor 33 is mounted on the air box 1. The output end of the servo motor 33 is connected to the input end of the gearbox 34. The output end of the gearbox 34 is detachably connected to the eccentric wheel 35 (for example, the shaft of the gearbox 34 is connected to the eccentric wheel 35 by a key). One end of the connecting rod 36 is movably connected to the eccentric wheel 35. The connecting rod 36 passes through the air box 1, and the other end of the connecting rod 36 is movably connected to the pressure plate 31.

[0057] Understandably, the servo motor 33 starts, reduces speed through the gearbox 34, and drives the eccentric wheel 35 to rotate, thereby driving the connecting rod 36 to move up and down, which in turn drives the pressure plate 31 to move up and down. Furthermore, the two servo motors 33 drive the pressure plates 31 on both sides to move in a staggered manner; for example, when the pressure plate 31 on the left moves upward, the pressure plate 31 on the right moves downward, so that airflow continuously enters the air collection chamber 101. The staggered pressure plates 31 on both sides draw in a large amount of gas, and when the pressure plates 31 are pressed down, high pressure is formed in the blower chamber 102, opening the opening and closing plate 23 in the vent hole to deliver high-pressure airflow into the air collection chamber 101.

[0058] In addition, when the power is off, the pressure plate 31 can be manually moved to supply air by removing the gearbox 34 and installing a handle on the eccentric wheel 35, which has a wide range of applications.

[0059] Furthermore, such as Figure 1 and Figure 7 As shown, the pressure plate 31 is provided with multiple limiting rods 37, which slide vertically through the air box 1. The length of the limiting rods 37 is greater than the travel of the pressure plate 31. Thus, the limiting rods 37 restrict the vertical movement of the pressure plate 31 in the up-down direction.

[0060] In some embodiments, such as Figures 1 to 9 As shown, the coal mine ventilation device of this embodiment of the invention also includes a distribution box 4 and a duct 6.

[0061] The air collection chamber 101 is connected to the inner cavity of the distribution box 4 via the air outlet pipe 12. The distribution box 4 is provided with multiple connecting pipes 41, the diameter of which is smaller than the diameter of the air outlet pipe 12. The connecting pipes 41 are detachably provided with caps 42. The connecting pipes 41 have a connected state and a blocked state. In the blocked state, the caps 42 are connected to the connecting pipes 41. In the connected state, the caps 42 are removed from the connecting pipes 41.

[0062] The air duct 6 includes a first straight pipe section 61, a corrugated pipe section 62, a second straight pipe section 63, and a guide pipe section 64 connected in sequence. The outlet end of the second straight pipe section 63 is ball-jointed to the inlet end of the guide pipe section 64. The diameter of the guide pipe section 64 is smaller than the diameter of the connecting pipe 41. The connecting pipe 41 is in the connected state. The inlet end of the first straight pipe section 61 is detachably connected to the connecting pipe 41.

[0063] Understandably, in actual engineering projects, ventilation at multiple points is required in roadways or chambers to ensure uniform air distribution. Therefore, multiple connecting pipes 41 are installed to facilitate the connection of the ventilation ducts 6. A corrugated section 62 is provided in the middle of the ventilation duct 6 to allow it to be bent and placed, suitable for complex mining environments. Furthermore, the direction of the guide section 64 of the ventilation duct 6 is adjustable, thereby regulating the direction of gas output.

[0064] In some embodiments, the coal mine ventilation device of the present invention further includes a humidification component 5, which includes a water tank 51 and a plurality of absorbent cotton plates 52. The water tank 51 is disposed on a distribution box 4, and the plurality of absorbent cotton plates 52 are distributed at intervals along a first direction in the inner cavity of the distribution box 4. The absorbent cotton plates 52 are provided with absorbent cotton strips 53, which penetrate the water tank 51 and are connected to the bottom of the water tank 51.

[0065] Understandably, the water in the water tank 51 is guided onto the absorbent board 52 via the absorbent cotton strip 53. The absorbent board 52 distributes the water evenly, thereby humidifying the airflow and ensuring a moist environment when the air is introduced. Furthermore, due to the absorbency of the absorbent cotton strip 53 and the absorbent board 52, the absorbent board 52 will automatically replenish water after the airflow carries away some of the moisture.

[0066] In some embodiments, such as Figures 1 to 9 As shown, an outer pipe 14 is provided on the air inlet pipe 13. The cross-sectional area of ​​the outer pipe 14 gradually decreases from upstream to downstream. A filter screen 141 is provided inside the outer pipe 14.

[0067] In other words, the inlet end (rear end) of the outer tube 14 is wide-mouthed, allowing gas to be drawn in through the wide-mouthed outer tube 14, thus increasing the amount of gas drawn in. The filter plate 141 is disc-shaped, which facilitates installation inside the outer tube 14. The filter plate 141 filters impurities in the air, ensuring the cleanliness of the gas.

[0068] In some embodiments, such as Figures 1 to 9 As shown, a fixing frame 15 is fitted on the bellows 1, and the fixing frame 15 has multiple mounting holes 151 so that the bellows 1 can be installed in the tunnel by fasteners (anchor nails, anchor rods, screws, etc.).

[0069] 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.

[0070] 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.

[0071] 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.

[0072] 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.

[0073] 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.

[0074] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A coal mine extraction ventilation device, characterised in that, include: A bellows, wherein a partition is provided inside the bellows to divide the inner cavity of the bellows into an air collecting chamber and multiple air blowing chambers. The partition is provided with a vent hole for communicating between the air blowing chamber and the air collecting chamber. The bellows is provided with an air outlet pipe communicating with the air collecting chamber. The bellows is also provided with an air inlet pipe corresponding to and communicating with each of the multiple air blowing chambers. The diameter of the air inlet pipe, the diameter of the vent hole and the diameter of the air outlet pipe are the same. Multiple ventilation components are provided, each disposed within a plurality of ventilation holes and a plurality of air inlet pipes. Each ventilation component has an open state and a closed state. In the open state, the ventilation component located in the ventilation hole connects the blower chamber and the air collecting chamber, and the ventilation component located in the air inlet pipe connects the air inlet pipe and the blower chamber. In the closed state, the ventilation component located in the ventilation hole blocks the blower chamber and the air collecting chamber, and the ventilation component located in the air inlet pipe blocks the air inlet pipe and the blower chamber. Multiple blower assemblies, each including a pressure plate, are respectively disposed in multiple blower chambers. The pressure plates are movable between a first position and a second position to adjust the pressure in the blower chamber. When the pressure in the blower chamber is higher than a preset value, the venting assembly located in the vent hole is in an open state, and the venting assembly located in the air inlet pipe is in a closed state. When the pressure in the blower chamber is lower than the preset value, the venting assembly located in the air inlet pipe is in an open state, and the venting assembly located in the vent hole is in a closed state. The distribution box has an air collection chamber connected to its inner cavity via an air outlet pipe. The distribution box is equipped with multiple connecting pipes, each with a diameter smaller than that of the air outlet pipe. Each connecting pipe is detachably fitted with a cap. The connecting pipe has a connected state and a blocked state. In the blocked state, the cap is connected to the connecting pipe. In the connected state, the cap is removed from the connecting pipe.

2. The coal mine extraction ventilation device of claim 1, wherein, The ventilation assembly includes: The mounting ring has an outer peripheral wall connected to the wall of the corresponding vent hole or the wall of the air inlet pipe, and the mounting ring is provided with a connecting rod extending radially along the mounting ring. Two semi-circular opening and closing plates are disposed opposite each other on both sides of the connecting rod and are rotatably connected to the connecting rod. The two opening and closing plates are used to jointly block the central through hole of the mounting ring, and the opening and closing plates open unidirectionally along the gas flow direction. Two return springs are provided, each corresponding to one of the two opening and closing plates. One end of each return spring is connected to the connecting rod, and the other end is connected to the opening and closing plate, so that the opening and closing plate can be reset when opened in one direction.

3. The coal mine extraction ventilation device of claim 2, wherein, The mounting ring is also provided with two sealing strips that correspond one-to-one with the two opening and closing plates. The sealing strips are arc-shaped and match the opening and closing plates.

4. The coal mine extraction ventilation device of claim 1, wherein, The blower assembly also includes: An annular rubber diaphragm, the inner end of which is connected to the peripheral wall of the pressure plate, and the outer end of which is connected to the cavity wall of the blower. The driving component includes a servo motor, a gearbox, an eccentric wheel, and a connecting rod. The servo motor is mounted on the air box, and its output end is connected to the input end of the gearbox. The output end of the gearbox is detachably connected to the eccentric wheel. One end of the connecting rod is movably connected to the eccentric wheel, the connecting rod passes through the air box, and the other end of the connecting rod is movably connected to the pressure plate.

5. The coal mine extraction ventilation device of claim 4, wherein, The pressure plate is provided with multiple limiting rods, which slide through the air box in the vertical direction, and the length of the limiting rods is greater than the travel of the pressure plate.

6. A coal mine extraction ventilation device according to any one of claims 1 to 5, wherein, It also includes a humidification component, which includes a water tank and multiple absorbent cotton plates. The water tank is located on the distribution box, and the multiple absorbent cotton plates are spaced apart in the inner cavity of the distribution box along a first direction. Each absorbent cotton plate is provided with absorbent cotton strips, which pass through the water tank and are connected to the bottom of the water tank.

7. A coal mine extraction ventilation device according to any one of claims 1 to 5, wherein, It also includes an air duct, which comprises a first straight pipe section, a corrugated pipe section, a second straight pipe section, and a guide pipe section connected in sequence. The outlet end of the second straight pipe section is ball-jointed to the inlet section of the guide pipe section. The diameter of the guide pipe section is smaller than the diameter of the connecting pipe. In the connected state, the inlet end of the first straight pipe section is detachably connected to the connecting pipe.

8. The coal mine ventilation device according to claim 1, characterized in that, The air inlet pipe is equipped with an outer pipe, the cross-sectional area of ​​which gradually decreases from upstream to downstream, and a filter screen is installed inside the outer pipe.

9. The coal mine ventilation device according to claim 1, characterized in that, The bellows is fitted with a mounting bracket, which has multiple mounting holes to allow the bellows to be installed in the tunnel.

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