A method for controlling gas in fully mechanized mining faces

Abstract

This invention relates to the field of coal mine management technology, and more particularly to a method for controlling gas in a fully mechanized longwall face. The method includes a ventilation pipe, valves, a connecting device, a height adjustment device, a direction adjustment device, and a fully mechanized longwall face. The gas control device is fixed within the fully mechanized longwall face, with the ventilation pipe also fixed there. A filter plate from the connecting device is then placed at a suitable position on a support ring within the connecting pipe. The positioning pipe is then moved upwards, allowing the positioning device to pass through a through-hole in the ring. At this point, a limiting ring on the top of the filter plate moves to the outside of the connecting pipe, and the filter plate comes into contact with the connecting pipe. The positioning pipe is then rotated, causing the positioning device to rotate. In this invention, the connecting pipe, connecting ring, positioning pipe, support ring, positioning device, filter plate, and limiting ring facilitate the positioning and installation of the filter plate, making filter plate replacement easier and facilitating the maintenance of the connecting device.

Description

Technical Field

[0001] This invention relates to the field of coal mine management technology, specifically a method for managing gas in fully mechanized longwall mining faces. Background Technology

[0002] The full name of a fully mechanized longwall mining face is a fully mechanized top coal caving longwall mining face. As the name suggests, it is a longwall mining face with sufficient coal thickness on the basis of a conventional longwall mining face, with a high-power scraper conveyor installed behind the hydraulic support to cut and transport the coal that the coal mining machine cannot reach.

[0003] During operation, gas outbursts may occur in fully mechanized longwall mining faces. This increases the gas concentration within the face and poses a risk. To ensure the safety of the longwall mining face, it is necessary to extract and remove the gas. Traditional gas control methods typically extract gas directly through pipelines and ventilation devices, which cannot target the direction of gas outbursts, resulting in poor gas control efficiency. Therefore, a gas control method for fully mechanized longwall mining faces is proposed to address the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide a method for controlling gas in fully mechanized mining faces, so as to solve the problem of poor gas control efficiency.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A method for controlling gas in a fully mechanized longwall mining face includes the following steps:

[0007] Step 1: Fix the gas control device in the fully mechanized mining face. At this time, the ventilation pipe is also fixed in the fully mechanized mining face. Then, place the filter plate of the connecting device in a suitable position on the support ring set in the connecting pipe. Then, move the positioning pipe upward so that the positioning device passes through the through hole opened in the ring. At this time, the limiting ring set on the top of the filter plate moves to the outside of the connecting pipe, and the filter plate is in contact with the connecting pipe. Then, rotate the positioning pipe, and the positioning pipe drives the positioning device to rotate. At this time, the inclined surface of one side of the positioning plate of the positioning device contacts the connecting ring. As the positioning plate rotates, under the action of the inclined surface of the positioning plate, the fixing plate, connecting plate and bottom plate move upward. At this time, the spring is compressed until the positioning plate moves into the limiting groove opened in the connecting ring. At this time, under the action of the spring and the bottom plate, the connecting rod, fixing plate and positioning plate move downward until the positioning plate enters the limiting groove opened in the connecting ring, positioning the positioning pipe. At the same time, the filter plate is in close contact with the connecting pipe under the action of the spring.

[0008] Step 2: When a large amount of gas is released from the fully mechanized mining face, start the exhaust fan and the valves at the corresponding positions. Then, use a gas detection device to detect the gas concentration at the fully mechanized mining face. Then, according to the different gas concentrations at different locations, rotate the bolt. At this time, the bolt is spirally connected in the air inlet pipe. At the same time, the bolt drives the first rotating rod that is slidably connected to rotate. The first rotating rod on one side slides in the bolt, and the first rotating rod on the other side rotates in the air inlet pipe. At the same time, under the action of the fixed rod and the support rod, the second baffle rotates. Adjust the angle of the first baffle and the second baffle. At this time, the gas extraction in a specific direction can be accelerated, and the gas can be quickly discharged.

[0009] Step 3: When the gas emission point is too high, push the air inlet pipe upward. At this time, the rubber sleeve is compressed by force, and the rubber sleeve drives the bottom ring to move upward. The bottom ring drives the positioning rod to move upward. At this time, the positioning rod drives the positioning ring to move inside the tension sleeve. The positioning ring and positioning rod position the bottom ring, thereby realizing the contraction of the rubber sleeve, and then moving the air inlet pipe upward. This makes it convenient to extract gas near different gas emission points, which can quickly reduce the gas in the fully mechanized mining face.

[0010] Preferably, the system includes a ventilation duct, a valve, a connecting device, a height adjustment device, a direction adjustment device, and a fully mechanized working face. The ventilation duct is located within the fully mechanized working face. A valve is fixedly connected to the bottom of the ventilation duct. A connecting device is fixedly connected to the bottom of the valve. A height adjustment device is fixedly connected to the bottom of the connecting device. A direction adjustment device is fixedly connected to the bottom of the height adjustment device. The connecting device includes a connecting pipe, a connecting ring, and a positioning device. The outer side of the connecting pipe is fixedly connected to the connecting ring. There are four positioning devices, and each positioning device is located within the connecting ring. A support ring is provided on the outer side of each positioning device. A filter plate is provided, and a limiting ring is fixedly connected to the other side of the filter plate. The limiting ring is located on the outside of the connecting pipe. A positioning pipe is fixedly connected to the outside of the support ring. The connecting ring includes a ring body with uniformly distributed through holes and uniformly distributed limiting grooves. The positioning device includes a fixing plate with a positioning plate fixedly connected to one side of the bottom of the fixing plate and a connecting plate fixedly connected to the other side of the bottom of the fixing plate. A connecting rod is fixedly connected to the bottom of the connecting plate, and a base plate is fixedly connected to the other end of the connecting rod. Two connecting rods are connected as a group and pass through the support ring. A spring is provided on the outside of the end of the connecting rod near the base plate.

[0011] Preferably, the connecting plate is disposed within the through hole of the ring body, and the positioning plate is disposed within the limiting groove of the ring body, wherein the positioning plate is arranged in an isosceles trapezoidal shape.

[0012] Preferably, the connecting rods are arranged in pairs and evenly distributed on the outside of the filter plate, one end of the spring is tightly fitted with the support ring, and one side of the filter plate is tightly fitted with the connecting pipe.

[0013] Preferably, the height adjustment device includes a rubber sleeve and a positioning rod. A bottom ring is fixedly connected inside the rubber sleeve in a uniformly distributed manner. A top ring is fixedly connected inside the rubber sleeve in a uniformly distributed manner. A positioning rod is fixedly connected inside the bottom ring in a uniformly distributed manner. A positioning ring is fixedly connected outside the positioning rod in a uniformly distributed manner. A tensioning sleeve is tightly fitted to the outside of one end of the positioning rod. Four tensioning sleeves are fixed inside the top ring.

[0014] Preferably, the top of the positioning rod is hemispherical, and the outer side of the positioning ring is tightly fitted with the tensioning sleeve.

[0015] Preferably, the direction adjustment device includes an air intake pipe and a bolt. One side of the air intake pipe is screwed to the bolt, and a first rotating rod is slidably connected inside the bolt. One end of the first rotating rod is fixedly connected to a first baffle, and the other end of the first baffle is fixedly connected to the first rotating rod. A fixing rod is rotatably connected to the top of the first baffle, and a second baffle is rotatably connected to the outer sides of both ends of the fixing rod. A support rod is rotatably connected to one side of the second baffle, and the other end of the support rod is rotatably connected to the first baffle. A second rotating rod is fixedly connected to both ends of the second baffle, and the other end of the second rotating rod is rotatably connected to the air intake pipe.

[0016] Preferably, there are two second baffles and two support rods. The second baffles and support rods are arranged as a set on both sides of the first baffle, and both ends of the fixing rod are fixedly connected to the air intake pipe.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. In this invention, the connecting pipe, connecting ring, positioning pipe, support ring, positioning device, filter plate, and limiting ring can conveniently position and install the filter plate, facilitate filter plate replacement, and facilitate maintenance of the connecting device. The positioning pipe can be conveniently installed and assembled with the height adjustment device and direction adjustment device through the ring body, through hole, limiting groove, fixing plate, positioning plate, connecting plate, connecting rod, base plate, and spring.

[0019] 2. In this invention, the height of the directional adjustment device can be easily adjusted by the rubber sleeve, bottom ring, top ring, positioning rod, positioning ring and tensioning sleeve. This allows the directional adjustment device to extract gas at different heights. By directional extraction, the speed of gas discharge is increased, making the fully mechanized mining face safer.

[0020] 3. In this invention, the intake pipe, first baffle, second baffle, first rotating rod, second rotating rod, fixing rod, bolt and support rod can be set to easily adjust the intake direction of the intake pipe, making it easier to extract gas in different directions, making the gas extraction direction more targeted and improving the efficiency of gas extraction. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the installation structure of the ventilation duct of the present invention;

[0023] Figure 3 This is a cross-sectional view of the connecting device of the present invention;

[0024] Figure 4 This is a schematic diagram of the positioning device of the present invention;

[0025] Figure 5 This is a top view of the connecting ring structure of the present invention;

[0026] Figure 6 For the present invention Figure 3 A schematic diagram of the structure at point A;

[0027] Figure 7 This is a cross-sectional view of the height adjustment device of the present invention;

[0028] Figure 8 For the present invention Figure 7 A schematic diagram of the structure at point B;

[0029] Figure 9 This is a top cross-sectional view of the orientation adjustment device of the present invention;

[0030] Figure 10 This is a schematic cross-sectional view of the installation structure of the support rod of the present invention.

[0031] In the diagram: 1-Ventilation duct, 2-Valve, 3-Connecting device, 301-Connecting pipe, 302-Connecting ring, 3021-Ring body, 3022-Through hole, 3023-Limiting groove, 303-Positioning pipe, 304-Supporting ring, 305-Positioning device, 3051-Fixing plate, 3052-Positioning plate, 3053-Connecting plate, 3054-Connecting rod, 3055-Base plate, 3056-Spring, 306-Filter plate. 307-Limit ring, 4-Height adjustment device, 401-Rubber sleeve, 402-Bottom ring, 403-Top ring, 404-Positioning rod, 405-Positioning ring, 406-Tightening sleeve, 5-Direction adjustment device, 501-Air inlet pipe, 502-First baffle, 503-Second baffle, 504-First rotating rod, 505-Second rotating rod, 506-Fixing rod, 507-Bolt, 508-Support rod, 6-Machining working face. Detailed Implementation

[0032] Please see Figure 1-10 The present invention provides a technical solution:

[0033] A method for controlling gas in a fully mechanized longwall mining face includes a ventilation pipe 1, a valve 2, a connecting device 3, a height adjustment device 4, a direction adjustment device 5, and a fully mechanized longwall mining face 6. The ventilation pipe 1 is installed inside the fully mechanized longwall mining face 6. The bottom of the ventilation pipe 1 is fixedly connected to the valve 2. The bottom of the valve 2 is fixedly connected to the connecting device 3. The bottom of the connecting device 3 is fixedly connected to the height adjustment device 4. The bottom of the height adjustment device 4 is fixedly connected to the direction adjustment device 5. The connecting device 3 includes a connecting pipe 301, a connecting ring 302, and a positioning device 305. The outer side of the connecting pipe 301 is fixedly connected to the connecting ring 302. The positioning device 305 is fixedly connected to the connecting ring 302. There are four in total, and the positioning device 305 is set inside the connecting ring 302. A support ring 304 is set outside the positioning device 305. A filter plate 306 is set on one side of the support ring 304. A limit ring 307 is fixedly connected to the other side of the filter plate 306. The limit ring 307 is set outside the connecting pipe 301. A positioning pipe 303 is fixedly connected to the outside of the support ring 304. The connecting ring 302 includes a ring body 3021. The ring body 3021 has uniformly distributed through holes 3022 and uniformly distributed limit grooves 3023. The positioning device 305 includes a fixing plate 3051, which is fixed. A positioning plate 3052 is fixedly connected to one side of the bottom of plate 3051, and a connecting plate 3053 is fixedly connected to the other side of the bottom of plate 3051. A connecting rod 3054 is fixedly connected to the bottom of connecting plate 3053, and a base plate 3055 is fixedly connected to the other end of connecting rod 3054. Two connecting rods 3054 form a group that pass through support ring 304. A spring 3056 is provided on the outer side of the end of connecting rod 3054 near the base plate 3055. This setting allows for convenient installation of the height adjustment device 4 and the direction adjustment device 5, and also facilitates the replacement of filter plate 306. The connecting plate 3053 is configured as follows. Inside the through hole 3022 of the ring body 3021, the positioning plate 3052 is set inside the limiting groove 3023 of the ring body 3021. The positioning plate 3052 is set in an isosceles trapezoidal shape. This setting facilitates the installation and positioning of the positioning tube 303. The connecting rods 3054 are evenly distributed in pairs on the outside of the filter plate 306. One end of the spring 3056 is tightly fitted with the support ring 304, and one side of the filter plate 306 is tightly fitted with the connecting tube 301. This setting facilitates the positioning of the filter plate 306 and the maintenance of the filter plate 306.

[0034] like Figure 1 , 2As shown in Figures 7 and 8, the height adjustment device 4 includes a rubber sleeve 401 and a positioning rod 404. A bottom ring 402, evenly distributed, is fixedly connected inside the rubber sleeve 401. A top ring 403, also evenly distributed, is fixedly connected inside the rubber sleeve 401. Positioning rods 404, also evenly distributed, are fixedly connected inside the bottom ring 402. Positioning rings 405, also evenly distributed, are fixedly connected to the outer side of the positioning rods 404. Tensioning sleeves 406 are tightly fitted to the outer side of one end of the positioning rod 404. Four tensioning sleeves 406 are fixed in a group inside the top ring 403. This arrangement allows for convenient adjustment of the height of the direction adjustment device 5, facilitating the extraction of gas at different heights. The top of the positioning rod 404 is hemispherical, and the outer side of the positioning ring 405 is tightly fitted to the tensioning sleeve 406. This arrangement allows for convenient height positioning, facilitating targeted gas extraction and improving the effectiveness of gas control.

[0035] like Figure 1 , 2 As shown in Figures 9 and 10, the direction adjustment device 5 includes an intake pipe 501 and a bolt 507. One side of the intake pipe 501 is screwed to the bolt 507. A first rotating rod 504 is slidably connected inside the bolt 507. A first baffle 502 is fixedly connected to one end of the first rotating rod 504. The other end of the first baffle 502 is fixedly connected to the first rotating rod 504. A fixing rod 506 is rotatably connected to the top of the first baffle 502. A second baffle 503 is rotatably connected to the outer sides of both ends of the fixing rod 506. A support rod 508 is rotatably connected to one side of the second baffle 503. The other end of the support rod 508 is connected to the first baffle 504. A first baffle 502 is rotatably connected, and a second baffle 503 has a second rotating rod 505 fixedly connected to both ends. The other end of the second rotating rod 505 is rotatably connected to the air inlet pipe 501. This setting can adjust the extraction angle to make gas extraction more directional. There are two second baffles 503 and two support rods 508. The second baffles 503 and support rods 508 are set as a group on both sides of the first baffle 502. The fixed rod 506 is fixedly connected to the air inlet pipe 501 at both ends. This setting can guide the air and improve the extraction efficiency of the gas outflow direction.

[0036] Treatment method: Fix the gas control device in the fully mechanized longwall face 6. At this time, the ventilation pipe 1 is fixed in the fully mechanized longwall face 6. Then, place the filter plate 306 of the connecting device 3 at a suitable position on the support ring 304 set in the connecting pipe 301. Then, move the positioning pipe 303 upward so that the positioning device 305 passes through the through hole 3022 opened in the ring body 3021. At this time, the limiting ring 307 set at the top of the filter plate 306 moves to the outside of the connecting pipe 301, and the filter plate 306 is in contact with the connecting pipe 301. Then, rotate the positioning pipe 303, which drives the positioning device 305 to rotate. At this time, the positioning plate 3052 set in the positioning device 305 is in contact with the connecting pipe 301. One inclined surface contacts the connecting ring 302. As the positioning plate 3052 rotates, the inclined surface of the positioning plate 3052 causes the fixing plate 3051, connecting plate 3053, and base plate 3055 to move upward. At this time, the spring 3056 is compressed until the positioning plate 3052 moves into the limiting groove 3023 opened in the connecting ring 302. Then, under the action of the spring 3056 and the base plate 3055, the connecting rod 3054, fixing plate 3051, and positioning plate 3052 move downward until the positioning plate 3052 enters the limiting groove 3023 opened in the connecting ring 302, positioning the positioning tube 303. At the same time, the filter plate 306 is in contact with the connecting ring 3052 under the action of the spring 3056. The connecting pipe 301 fits tightly. When a large amount of gas emerges from the fully mechanized mining face 6, the exhaust fan and the corresponding valve 2 are started. Then, the gas concentration at the fully mechanized mining face 6 is detected by the gas detection device. Then, according to the different gas concentrations at different locations, the bolt 507 is rotated. At this time, the bolt 507 is spirally connected inside the air inlet pipe 501. At the same time, the bolt 507 drives the first rotating rod 504, which is slidably connected, to rotate. The first rotating rod 504 on one side slides inside the bolt 507, and the first rotating rod 504 on the other side rotates inside the air inlet pipe 501. At the same time, under the action of the fixed rod 506 and the support rod 508, the second baffle 503 is driven to rotate, adjusting the first baffle 502 and the second baffle 503. The angle of plate 503 can accelerate gas extraction in a specific direction and quickly release gas. When the gas emission point is too high, the air inlet pipe 501 is pushed upward. At this time, the rubber sleeve 401 is compressed, and the rubber sleeve 401 drives the bottom ring 402 to move upward. The bottom ring 402 drives the positioning rod 404 to move upward. At this time, the positioning rod 404 drives the positioning ring 405 to move within the tensioning sleeve 406. The bottom ring 402 is positioned by the positioning ring 405 and the positioning rod 404, thereby realizing the contraction of the rubber sleeve 401, and then moving the air inlet pipe 501 upward. This facilitates the extraction of gas near different gas emission points and can quickly reduce the gas in the fully mechanized mining face 6.

[0037] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only for the purpose of helping to understand the method and core ideas of the present invention. The above descriptions are only preferred embodiments of the present invention. It should be noted that due to the limitations of textual expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of the present invention.

Claims

1. A gas control method for a fully-mechanized caving face, characterized in that, Comprise the following steps: Step one: the gas control device is fixed in the fully mechanized caving face (6), at this time the ventilation pipe (1) is fixed in the fully mechanized caving face (6), then the filter plate (306) provided by the connecting device (3) is placed on the support ring (304) provided in the connecting pipe (301), then the positioning pipe (303) is moved upward, the positioning device (305) passes through the through hole (3022) provided by the ring body (3021), at this time the limiting ring (307) provided on the top of the filter plate (306) moves to the outside of the connecting pipe (301), and the filter plate (306) is attached to the connecting pipe (301), then the positioning pipe (303) is rotated, the positioning pipe (303) drives the positioning device (305) to rotate, at this time the one side slope of the positioning plate (3052) provided by the positioning device (305) is in contact with the connecting ring (302), with the rotation of the positioning plate (3052), under the action of the slope of the positioning plate (3052), the fixed plate (3051), the connecting plate (3053) and the bottom plate (3055) are driven to move upward, at this time the spring (3056) is compressed under stress, until the positioning plate (3052) moves into the limiting groove (3023) provided by the connecting ring (302), at this time the connecting rod (3054), the fixed plate (3051) and the positioning plate (3052) are driven to move downward under the action of the spring (3056) and the bottom plate (3055), until the positioning plate (3052) enters the limiting groove (3023) provided by the connecting ring (302), the positioning pipe (303) is positioned, and the filter plate (306) is tightly attached to the connecting pipe (301) under the action of the spring (3056); Step two: when a large amount of gas is discharged in the fully mechanized caving face (6), start the air extractor and the corresponding valve (2), then detect the gas concentration of the fully mechanized caving face (6) through the gas detection device, then rotate the bolt (507), at this time the bolt (507) is spirally connected in the air inlet pipe (501), and the bolt (507) drives the first rotating rod (504) connected with the sliding to rotate, the first rotating rod (504) on one side slides in the bolt (507), and the first rotating rod (504) on the other side rotates in the air inlet pipe (501), and under the action of the fixed rod (506) and the supporting rod (508), the second baffle (503) is driven to rotate, the angle of the first baffle (502) and the second baffle (503) is adjusted, at this time the gas extraction in a specific direction is accelerated, and the gas is discharged quickly; Step three: when the gas emission position is too high, push the air inlet pipe (501) upwards, at this time the rubber sleeve (401) is compressed under force, the rubber sleeve (401) drives the bottom ring (402) to move upwards, the bottom ring (402) drives the positioning rod (404) to move upwards, at this time the positioning rod (404) drives the positioning ring (405) to move in the tension sleeve (406), the positioning ring (405) and the positioning rod (404) are used for positioning the bottom ring (402), so as to realize the contraction of the rubber sleeve (401), and then move the air inlet pipe (501) upwards, so as to facilitate the extraction of gas near different gas emission positions, and quickly reduce the gas in the fully mechanized caving face (6); The fully mechanized caving face gas treatment device comprises a ventilation pipe (1), a valve (2), a connecting device (3), a height adjusting device (4) and a direction adjusting device (5). The ventilation pipe (1) is arranged in the fully mechanized caving face (6). The bottom of the ventilation pipe (1) is fixedly connected with the valve (2). The bottom of the valve (2) is fixedly connected with the connecting device (3). The bottom of the connecting device (3) is fixedly connected with the height adjusting device (4). The bottom of the height adjusting device (4) is fixedly connected with the direction adjusting device (5). The connecting device (3) comprises a connecting pipe (301), a connecting ring (302) and a positioning device (305). The outer side of the connecting pipe (301) is fixedly connected with the connecting ring (302). The number of the positioning device (305) is four. The positioning device (305) is arranged in the connecting ring (302). The outer side of the positioning device (305) is provided with a supporting ring (304). One side of the supporting ring (304) is provided with a filter plate (306). The other side of the filter plate (306) is fixedly connected with a limiting ring (307). The limiting ring (307) is arranged on the outer side of the connecting pipe (301). The outer side of the supporting ring (304) is fixedly connected with a positioning pipe (303). The connecting ring (302) comprises a ring body (3021). Uniformly distributed through holes (3022) are formed in the ring body (3021). Uniformly distributed limiting grooves (3023) are formed in the ring body (3021). The positioning device (305) comprises a fixed plate (3051). One side of the bottom of the fixed plate (3051) is fixedly connected with a positioning plate (3052). The other side of the bottom of the fixed plate (3051) is fixedly connected with a connecting plate (3053). The bottom of the connecting plate (3053) is fixedly connected with a connecting rod (3054). The other end of the connecting rod (3054) is fixedly connected with a bottom plate (3055). Two connecting rods (3054) are a group and penetrate through the supporting ring (304). One end of the connecting rod (3054) close to the bottom plate (3055) is provided with a spring (3056) on the outer side. The connecting plate (3053) is arranged in the through hole (3022) of the ring body (3021), the positioning plate (3052) is arranged in the limiting groove (3023) of the ring body (3021), and the positioning plate (3052) is arranged in the isosceles trapezoidal shape; The connecting rod (3054) is arranged outside the filter plate (306) in two groups, one end of the spring (3056) is closely attached to the supporting ring (304), and one side of the filter plate (306) is closely attached to the connecting pipe (301); The height adjusting device (4) comprises a rubber sleeve (401) and a positioning rod (404), the rubber sleeve (401) is fixedly connected with evenly distributed bottom rings (402) inside, the rubber sleeve (401) is fixedly connected with evenly distributed top rings (403) inside, the bottom rings (402) are fixedly connected with evenly distributed positioning rods (404) inside, the positioning rods (404) are fixedly connected with evenly distributed positioning rings (405) outside, one end of the positioning rod (404) is closely attached with a tension sleeve (406) outside, and the four tension sleeves (406) are fixed in the top ring (403) in groups; The top end of the positioning rod (404) is arranged in a hemispherical shape, and the positioning ring (405) is closely attached to the tension sleeve (406) outside; The direction adjusting device (5) comprises an air inlet pipe (501) and a bolt (507), one side of the air inlet pipe (501) is screw-connected with the bolt (507), the first rotating rod (504) is slidably connected in the bolt (507), one end of the first rotating rod (504) is fixedly connected with the first baffle (502), the other end of the first baffle (502) is fixedly connected with the first rotating rod (504), the fixed rod (506) is rotatably connected to the top of the first baffle (502), the second baffles (503) are rotatably connected to the outer sides of both ends of the fixed rod (506), the supporting rods (508) are rotatably connected to one side of the second baffles (503), the other ends of the supporting rods (508) are rotatably connected with the first baffle (502), the second rotating rods (505) are fixedly connected to both ends of the second baffles (503), and the other ends of the second rotating rods (505) are rotatably connected with the air inlet pipe (501); The number of the second baffles (503) is two, the number of the supporting rods (508) is two, the second baffles (503) and the supporting rods (508) are arranged on both sides of the first baffle (502) in groups, and both ends of the fixed rod (506) are fixedly connected with the air inlet pipe (501).

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