Intelligent ventilation equipment for underground coal mine

Abstract

The utility model discloses an underground intelligent ventilation device for a coal mine, which belongs to the technical field of ventilation devices and comprises a pipeline and an air duct, the air duct is fixedly mounted on the pipeline, an induced draft fan is fixedly mounted in the air duct, a filtering and purifying mechanism is arranged in the pipeline, an elastic collision mechanism is arranged on the filtering and purifying mechanism, and the elastic collision mechanism is fixedly mounted on the pipeline. The filtering and purifying mechanism comprises a fixing ring and a driving shaft, when the filtering nets in the pipeline need to be cleaned, a worker can rotate the driving shaft outside the pipeline to enable the rotating shaft in the pipeline to rotate, the cleaning plate is driven through the rotating shaft, a brush on the cleaning plate is made to brush dust on the first filtering net, and the cleaning effect is good. Falling dust can be cleaned out by opening the bottom plate, dust removal and cleaning can be conveniently and rapidly conducted on a filter screen in the ventilation equipment, the ventilation quality is improved, and the phenomenon of bacterium breeding caused by dust accumulation is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of ventilation equipment technology, and specifically provides an intelligent ventilation device for underground coal mines. Background Technology

[0002] In today's energy-intensive society, coal mines are typically quite deep to extract more resources. This results in the presence of various harmful gases in deep mines, including carbon monoxide, hydrogen sulfide, sulfur dioxide, nitrogen dioxide, ammonia, hydrogen, and methane. The accumulation of these gases in large quantities can easily lead to poisoning, fires, and explosions. Therefore, safe mining operations often require mine ventilation to introduce large amounts of fresh air, dilute and expel harmful gases, and regulate temperature and humidity to improve the working environment for workers.

[0003] According to Chinese Patent Publication No. CN206513394U, a ventilation device for underground coal mines includes a housing, an exhaust chimney, a motor, and fan blades. The housing has a shock-absorbing base at its bottom and connecting clips at its joints. The housing has an air inlet and an air outlet at both ends. A filter and an inlet-side sound-absorbing layer are welded to the air inlet, and an outlet-side sound-absorbing layer is provided at the air outlet. The air outlet is connected to the exhaust chimney, which has an intelligent exhaust window equipped with a pressure sensor. An induced draft fan is located at the outlet end of the exhaust chimney. This utility model has a reasonable structural design and advantages such as long service life, low noise, and safe and stable operation.

[0004] After prolonged use, the filters inside the ventilation equipment accumulate a large amount of dust. If this dust is not cleaned in time, it can lead to filter blockage and bacterial growth, affecting the ventilation quality in coal mines. Existing cleaning methods generally require disassembly and removal for cleaning, which is cumbersome and can affect the normal use of the ventilation equipment. Therefore, an intelligent ventilation device for coal mines is proposed to solve the aforementioned problems. Utility Model Content

[0005] The technical problem to be solved by this utility model is to address the shortcomings of the prior art by providing an intelligent ventilation device for underground coal mines.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is: an intelligent ventilation device for underground coal mines, including a pipe and a ventilation duct, wherein the ventilation duct is fixedly installed at one end of the pipe, an induced draft fan is fixedly installed inside the ventilation duct, a filtration and purification mechanism is provided inside the pipe, and a spring impact mechanism is provided on the filtration and purification mechanism.

[0007] The filtration and purification mechanism includes a fixed ring and a drive shaft. The fixed ring is fixedly installed on the inner wall of the pipe. A ring frame is movable inside the fixed ring. A filter screen is fixedly installed inside the ring frame. A second bevel gear is fixedly installed at the upper end of the drive shaft. A first bevel gear meshes with the second bevel gear. A rotating shaft is fixedly installed inside the first bevel gear and is located on the axis of the pipe. A cleaning plate is fixedly installed on the rotating shaft. A brush that acts on the filter screen is fixedly installed on the cleaning plate.

[0008] Furthermore, the filtration and purification mechanism comprises two sets, which are arranged in parallel within the pipeline. The filter screen includes a first filter screen and a second filter screen, which are respectively fixedly installed on the two sets of filtration and purification mechanisms.

[0009] Furthermore, the drive shaft is rotatably mounted inside the pipe via bearings, and a throttle handle is fixedly installed at the lower end of the drive shaft.

[0010] Furthermore, a fixing frame is fixedly installed inside the pipe, and a bearing is assembled inside the fixing frame. The end of the rotating shaft is assembled on the inner wall of the inner ring of the bearing, and the rotating shaft passes through the middle of the ring frame and the filter screen.

[0011] Furthermore, the impact mechanism includes a fixed base, a first ring, and a second ring. The fixed base is fixedly installed on the inner wall of the fixed ring. A guide post is fixedly installed on the fixed base, and a spring is sleeved on the guide post. A limit block is fixedly installed at the other end of the guide post, and the other end of the guide post passes through the ring frame. The spring is located between the fixed base and the ring frame. A first hemisphere is fixedly connected to the first ring, and a second hemisphere is fixedly connected to the second ring.

[0012] Furthermore, the first ring is fixedly mounted on the ring frame, the second ring is fixedly mounted on the rotating shaft, and the positions of the first ring and the second ring correspond to each other. There are four first hemispheres, which are fixedly mounted on the first ring at equal intervals. There are also four second hemispheres, which are fixedly connected to the second ring at equal intervals.

[0013] Furthermore, a dust discharge port is provided at the bottom of the pipe, and the position of the dust discharge port corresponds to the filtration and purification mechanism. A base plate is installed inside the dust discharge port, and a support frame is fixedly installed at the bottom of the pipe.

[0014] Furthermore, a locking plate mechanism is provided at the bottom of the pipe, and the locking plate mechanism is located between the two dust discharge ports. The locking plate mechanism includes a fixed plate and a rotating column. The fixed plate is fixedly installed at the bottom of the pipe. The upper end of the rotating column is rotatably connected to the bottom of the fixed plate through a bearing. A gear is fixedly installed on the rotating column. A handwheel is fixedly installed at the outer end of the rotating column. A toothed plate is symmetrically mounted on the bottom of the fixed plate, and the toothed plate meshes with the gear. A locking plate is fixedly installed on the upper surface of the outer end of the toothed plate, and the locking plate is supported on the base plate.

[0015] Furthermore, a guide block is fixedly installed at the bottom of the fixing plate, a guide opening is provided on the toothed plate, and the guide block is inserted into the guide opening. A limiting plate is fixedly installed at the bottom of the guide block, and the width of the limiting plate is greater than the width of the guide opening.

[0016] The beneficial effects of using this utility model are:

[0017] 1. This utility model is designed with a first filter and a second filter, which can perform dual filtration and purification of the air in the ventilation, improve the quality of the air flowing out of the ventilation duct, and reduce the harm to the health of underground workers.

[0018] 2. This utility model utilizes the coordinated operation of a fixed ring, ring frame, filter screen, rotating shaft, cleaning plate, brush, first bevel gear, second bevel gear, drive shaft, throttle, fixed frame, and bearing. When cleaning the filter screen inside the pipe is required, it can simultaneously drive two sets of cleaning plates and brushes to rotate, thereby cleaning both filter screens at the same time. This facilitates quick and easy dust removal and cleaning of the three-dimensional filter screen inside the ventilation equipment, improving ventilation quality and preventing dust accumulation that leads to bacterial growth.

[0019] 3. This utility model utilizes the coordinated operation of a fixed base, guide post, spring, limiting block, first ring, first hemisphere, second ring, and second hemisphere. During the cleaning of the filter screen using a brush, the second ring rotates simultaneously, causing the second hemisphere to periodically contact the first hemisphere. This causes the ring frame to move periodically and reset under the action of the spring. The resulting vibration can shake off the dust on the filter screen, further improving the cleaning effect of the dust on the filter screen.

[0020] 4. Through the coordinated operation of the fixed plate, rotating column, gear, handwheel, guide block, limiting plate, toothed plate, guide port, and locking plate, this utility model allows for the simultaneous and rapid disassembly of both sides of the bottom plate by the transmission relationship of the gear and toothed plate when cleaning the dust that has fallen inside the pipe is required. This enables the simultaneous and rapid cleaning of the dust that has fallen without removing the filter screen, making the overall filter screen cleaning and dust removal work convenient and effective, and giving this ventilation equipment better practicality. Attached Figure Description

[0021] Figure 1 This is one of the three-dimensional structural schematic diagrams of this utility model.

[0022] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0023] Figure 3 This is a three-dimensional structural diagram of the filtration and purification mechanism of this utility model.

[0024] Figure 4 This is a cross-sectional structural diagram of the filtration and purification mechanism of this utility model.

[0025] Figure 5 This is a three-dimensional structural diagram of the impact mechanism of this utility model.

[0026] Figure 6 This is the second three-dimensional structural schematic diagram of the present invention.

[0027] Figure 7 This is a three-dimensional structural diagram of the locking plate mechanism of this utility model.

[0028] The reference numerals in the attached drawings include: 1. Pipe; 2. Filtration and purification mechanism; 201. Fixing ring; 202. Ring frame; 203. First filter screen; 204. Rotating shaft; 205. Cleaning plate; 206. Brush; 207. First bevel gear; 208. Second bevel gear; 209. Drive shaft; 210. Rotary handle; 211. Second filter screen; 212. Fixing frame; 213. Bearing; 3. Bounce mechanism; 301. Fixing base; 3 02. Guide post; 303. Spring; 304. Limiting block; 305. First ring; 306. First hemisphere; 307. Second ring; 308. Second hemisphere; 4. Locking plate mechanism; 401. Fixed plate; 402. Rotating column; 403. Gear; 404. Handwheel; 405. Guide block; 406. Limiting plate; 407. Toothed plate; 408. Guide port; 409. Locking plate; 5. Air duct; 6. Exhaust fan; 7. Base plate. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component 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 utility model.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] 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 one or more of that feature. In the description of this utility model, "several" means two or more, unless otherwise explicitly specified.

[0033] Example 1

[0034] Reference Figure 1 and Figure 2 A coal mine underground intelligent ventilation device includes a pipe 1 and a ventilation duct 5. The ventilation duct 5 is fixedly installed at one end of the pipe 1. An induced draft fan 6 is fixedly installed inside the ventilation duct 5. A filter purification mechanism 2 is installed inside the pipe 1. A bounce mechanism 3 is installed on the filter purification mechanism 2.

[0035] Ventilation is achieved through the ventilation duct 5 and the exhaust fan 6.

[0036] The filtration and purification unit 6 is used to filter dust from the air.

[0037] The impact mechanism 3 is used to assist in cleaning the filtration and purification mechanism 6.

[0038] like Figure 2 , Figure 3 and Figure 4As shown, the filtration and purification mechanism 2 includes a fixed ring 201 and a drive shaft 209. The fixed ring 201 is fixedly installed on the inner wall of the pipe 1. A ring frame 202 is movably mounted inside the fixed ring 201. A filter screen is fixedly installed inside the ring frame 202. A second bevel gear 208 is fixedly installed at the upper end of the drive shaft 209. A first bevel gear 207 meshes with the second bevel gear 208. A rotating shaft 204 is fixedly installed inside the first bevel gear 207, and the rotating shaft 204 is located on the axis of the pipe 1. A cleaning plate 205 is fixedly installed on the rotating shaft 204. A brush 206 that acts on the filter screen is fixedly installed on the cleaning plate 205.

[0039] The ring frame 202 has an internal support bracket to provide auxiliary support for the ring frame 202 and facilitate the installation of the filter screen. At the same time, the support bracket also provides auxiliary support for the rotating shaft 204.

[0040] The drive shaft 209 rotates, which drives the rotating shaft 204 to rotate through the transmission of the second bevel gear 208 and the first bevel gear 207. This, in turn, drives the cleaning plate 205 and the brush 206 to rotate, thereby cleaning the filter screen and sweeping off the dust attached to the surface of the filter screen.

[0041] The filtration and purification mechanism 2 allows for convenient and quick cleaning of the filter screen inside the ventilation equipment, improving ventilation quality and preventing dust accumulation that could lead to bacterial growth.

[0042] Specifically, such as Figure 2 and Figure 3 As shown, there are two sets of filtration and purification mechanisms 2, which are arranged in parallel inside the pipe 1. The filter screens include a first filter screen 203 and a second filter screen 211, which are respectively fixedly installed on the two sets of filtration and purification mechanisms 2.

[0043] By setting up a first filter 203 and a second filter 211, the air in the ventilation can be filtered and purified in two ways, improving the quality of the air flowing out of the duct 5.

[0044] Specifically, such as Figure 3 As shown, the drive shaft 209 is rotatably mounted inside the pipe 1 via a bearing, and a throttle 210 is fixedly installed at the lower end of the drive shaft 209.

[0045] The drive shaft 209 can be rotated by turning the throttle 210.

[0046] In practical applications, the throttle 210 can be connected to a motor or other power mechanism to achieve remote and timed control of the filter cleaning operation, thus realizing intelligent applications.

[0047] Specifically, such as Figure 2 and Figure 3As shown, a fixed bracket 212 is fixedly installed inside the pipe 1. A bearing 213 is assembled inside the fixed bracket 212, and the end of the rotating shaft 204 is assembled on the inner wall of the inner ring of the bearing 213. The rotating shaft 204 passes through the middle of the ring frame 202 and the filter screen.

[0048] The fixed frame 212 and bearing 213 are set to support the rotating shaft 204, facilitate the rotation of the rotating shaft 204, and improve the stability of the rotation of the rotating shaft 204.

[0049] Specifically, such as Figure 5 As shown, the impact mechanism 3 includes a fixed base 301, a first ring 305, and a second ring 307. The fixed base 301 is fixedly installed on the inner wall of the fixed ring 201. A guide post 302 is fixedly installed on the fixed base 301. A spring 303 is sleeved on the guide post 302. A limit block 304 is fixedly installed on the other end of the guide post 302. The other end of the guide post 302 passes through the ring frame 202, and the spring 303 is located between the fixed base 301 and the ring frame 202. A first hemisphere 306 is fixedly connected to the first ring 305, and a second hemisphere 308 is fixedly connected to the second ring 307.

[0050] Specifically, such as Figure 5 As shown, the first ring 305 is fixedly installed on the ring frame 202, the second ring 307 is fixedly installed on the rotating shaft 204, and the positions of the first ring 305 and the second ring 307 are corresponding. There are four first hemispheres 306, which are fixedly installed on the first ring 305 at equal intervals. There are four second hemispheres 308, which are fixedly connected to the second ring 307 at equal intervals.

[0051] When the rotating shaft 204 rotates, it will drive the second ring 307 to rotate. When the second hemisphere 308 on the second ring 307 contacts the first hemisphere 306 on the first ring 305, it will push the first ring 305 to drive the ring frame 202 to move axially and compress the spring 303. When the first hemisphere 306 and the second hemisphere 308 are misaligned, the ring frame 202 will reset under the action of the spring 303 and hit the limit block 304. The resulting vibration will shake off the dust on the filter screen, further improving the dust cleaning effect on the filter screen.

[0052] The number of the first hemisphere 306 and the second hemisphere 308 can be adjusted according to the actual situation. It is necessary to ensure that the number of the first hemisphere 306 and the second hemisphere 308 are the same, and the spacing between adjacent first hemisphere 306 or second hemisphere 308 is the same.

[0053] Specifically, such as Figure 6 As shown, a dust discharge port is provided at the bottom of the pipe 1, and the position of the dust discharge port corresponds to the filter purification mechanism 2. A base plate 7 is installed inside the dust discharge port, and a support frame is fixedly installed at the bottom of the pipe 1.

[0054] After removing the base plate 7, the dust swept out of the pipe 1 can be cleaned and discharged.

[0055] The support frame is used to support pipe 1.

[0056] Working principle: When it is necessary to clean the filter screen inside the pipe 1, the operator can turn the handle 210 outside the pipe 1 to drive the drive shaft 209 to rotate. The drive shaft 209 drives the rotating shaft 204 to rotate through the transmission of the first bevel gear 207 and the second bevel gear 208, which in turn drives the cleaning plate 205 and the brush 206 to rotate, sweeping the dust on the filter screen. The fallen dust can be cleaned out by opening the bottom plate 7.

[0057] Meanwhile, as the rotating shaft 204 rotates, it will drive the second ring 307 to rotate. When the second hemisphere 308 on the second ring 307 contacts the first hemisphere 306 on the first ring 305, it will push the first ring 305 and the ring frame 202 to move. When the first hemisphere 306 and the second hemisphere 308 are misaligned, the ring frame 202 will reset under the action of the spring 303 and hit the limit block 304, causing the ring frame 202 and the filter screen to vibrate, which can shake off the dust on the filter screen.

[0058] Example 2

[0059] Based on Example 1, a locking mechanism 4 was designed.

[0060] The locking mechanism 4 is used to limit and fix the base plate 7, and at the same time, it is used to realize the quick disassembly and installation of the base plate 7.

[0061] Specifically, such as Figure 6 and Figure 7 As shown, a locking plate mechanism 4 is provided at the bottom of the pipe 1, and the locking plate mechanism 4 is located between two dust discharge ports. The locking plate mechanism 4 includes a fixed plate 401 and a rotating column 402. The fixed plate 401 is fixedly installed at the bottom of the pipe 1. The upper end of the rotating column 402 is rotatably connected to the bottom of the fixed plate 401 through a bearing. A gear 403 is fixedly installed on the rotating column 402. A handwheel 404 is fixedly installed at the outer end of the rotating column 402. A toothed plate 407 is symmetrically mounted on the bottom of the fixed plate 401, and the toothed plate 407 meshes with the gear 403. A locking plate 409 is fixedly installed on the upper surface of the outer end of the toothed plate 407, and the locking plate 409 is supported on the base plate 7.

[0062] The locking plate 409 is used to support and limit the base plate 7, so that the base plate 7 is installed on the pipe 1.

[0063] Since the symmetrically arranged toothed plates 407 are located on both sides of the gear 403, when the gear 403 rotates, it will drive the two toothed plates 407 to move in opposite directions. When the two sets of toothed plates 407 and the locking plate 409 move inward and the locking plate 409 separates from the base plate 7, the base plate 7 can be easily removed for cleaning.

[0064] In practical applications, the rotating column 402 can be connected to a motor or other power mechanism to achieve automated rotation and save manpower.

[0065] Specifically, such as Figure 7 As shown, a guide block 405 is fixedly installed on the bottom of the fixed plate 401, and a guide opening 408 is provided on the toothed plate 407. The guide block 405 is inserted into the guide opening 408. A limiting plate 406 is fixedly installed on the bottom of the guide block 405, and the width of the limiting plate 406 is greater than the width of the guide opening 408.

[0066] The guide block 405 is cuboid in shape, which ensures that the toothed plate 407 moves in a straight line. The limiting plate 406 is designed to limit the position of the toothed plate 407, thereby ensuring that the locking plate 409 can effectively contact and support the base plate 7.

[0067] Working principle: When it is necessary to clean the dust inside pipe 1, the operator can rotate the handwheel 404 to drive the rotating column 402 to rotate. The rotating column 402 drives the gear 403 to rotate, thereby moving the two toothed plates 407 inward and moving the locking plate 409 away from the base plate 7. When the base plate 7 is no longer limited and fixed by the locking plate 409, it can be directly removed from the dust discharge port of pipe 1, so as to facilitate the discharge of the cleaned dust out of pipe 1. The disassembly of the two base plates 7 can be completed at the same time, saving disassembly time and improving the efficiency of dust treatment inside pipe 1.

[0068] The above content is only a preferred embodiment of this utility model. For those skilled in the art, many changes can be made in the specific implementation and application scope based on the concept of this utility model. As long as these changes do not depart from the concept of this utility model, they all fall within the protection scope of this utility model.

Claims

1. An intelligent ventilation device for underground coal mines, characterized in that: The utility model provides a pipeline (1) and a wind tube (5), the wind tube (5) is fixedly installed at one end of pipeline (1), the inside of wind tube (5) is fixedly installed with air guide fan (6), the inside of pipeline (1) is provided with filter purification mechanism (2), be provided with elastic impact mechanism (3) on filter purification mechanism (2). The filter purification mechanism (2) includes a fixed ring (201) and a drive shaft (209), the fixed ring (201) is fixedly installed on the inner wall of the pipeline (1), a ring holder (202) is movably assembled in the fixed ring (201), a filter screen is fixedly installed in the ring holder (202), a second bevel gear (208) is fixedly installed on the upper end of the drive shaft (209), a first bevel gear (207) is engaged with the second bevel gear (208), a rotating shaft (204) is fixedly installed in the first bevel gear (207), and the rotating shaft (204) is located on the axis of the pipeline (1), a cleaning plate (205) is fixedly installed on the rotating shaft (204), and a brush (206) acting on the filter screen is fixedly installed on the cleaning plate (205).

2. The intelligent ventilation equipment for underground coal mine of claim 1, wherein: The filter purification mechanism (2) has two groups, and the two groups of filter purification mechanisms (2) are arranged in parallel in the pipeline (1), the filter screen includes a first filter screen (203) and a second filter screen (211), and the first filter screen (203) and the second filter screen (211) are fixedly installed on the two groups of filter purification mechanisms (2) respectively.

3. The intelligent ventilation equipment for underground coal mine of claim 1, wherein: The drive shaft (209) is rotatably assembled in the pipeline (1) through a bearing, and a steering wheel (210) is fixedly installed on the lower end of the drive shaft (209).

4. The intelligent ventilation equipment for underground coal mine of claim 1, wherein: A fixed frame (212) is fixedly installed in the pipeline (1), a bearing (213) is assembled in the fixed frame (212), the end of the rotating shaft (204) is assembled on the inner wall of the inner ring of the bearing (213), and the rotating shaft (204) penetrates the middle part of the ring holder (202) and the filter screen.

5. The intelligent ventilation equipment for underground coal mine of claim 1, wherein: The elastic impact mechanism (3) includes a fixed seat (301), a first circular ring (305), and a second circular ring (307), the fixed seat (301) is fixedly installed on the inner wall of the fixed ring (201), a guide column (302) is fixedly installed on the fixed seat (301), a spring (303) is sleeved on the guide column (302), a limiting block (304) is fixedly installed on the other end of the guide column (302), the other end of the guide column (302) penetrates the ring holder (202), the spring (303) is located between the fixed seat (301) and the ring holder (202), a first hemisphere (306) is fixedly connected on the first circular ring (305), and a second hemisphere (308) is fixedly connected on the second circular ring (307).

6. The intelligent ventilation device for underground coal mine of claim 5, wherein: The first circular ring (305) is fixedly installed on the ring frame (202), the second circular ring (307) is fixedly installed on the rotating shaft (204), and the first circular ring (305) and the second circular ring (307) are in position correspondence, the number of the first hemispheres (306) is four, four first hemispheres (306) are fixedly installed on the first circular ring (305) at equal intervals, the number of the second hemispheres (308) is four, and four second hemispheres (308) are fixedly connected to the second circular ring (307) at equal intervals.

7. The intelligent ventilation equipment for underground coal mine of claim 1, wherein: The bottom of the pipeline (1) is provided with a dust discharge port, and the position of the dust discharge port corresponds to the filtering and purifying mechanism (2), the inside of the dust discharge port is equipped with a bottom plate (7), and the bottom of the pipeline (1) is fixedly installed with a support frame.

8. The intelligent ventilation device for underground coal mine of claim 7, wherein: The bottom of the pipeline (1) is provided with a lock plate mechanism (4), and the lock plate mechanism (4) is located between the two dust discharge ports, the lock plate mechanism (4) comprises a fixed plate (401) and a rotating column (402), the fixed plate (401) is fixedly installed at the bottom of the pipeline (1), the upper end of the rotating column (402) is rotatably connected to the bottom of the fixed plate (401) through a bearing, the rotating column (402) is fixedly installed with a gear (403), the outer end of the rotating column (402) is fixedly installed with a hand wheel (404), the bottom of the fixed plate (401) is movably equipped with a toothed plate (407) in a symmetrical manner, and the toothed plate (407) is engaged with the gear (403), the outer end of the toothed plate (407) is fixedly installed with a lock plate (409) on the upper surface, and the lock plate (409) is supported on the bottom plate (7).

9. The intelligent ventilation device for underground coal mine of claim 8, wherein: The bottom of the fixed plate (401) is fixedly installed with a guide block (405), the toothed plate (407) is provided with a guide opening (408), and the guide block (405) is inserted into the guide opening (408), the bottom of the guide block (405) is fixedly installed with a limiting plate (406), and the width of the limiting plate (406) is greater than the width of the guide opening (408).

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