A device for detecting the wind resistance of a fixed-wing aircraft

Abstract

This invention discloses a wind resistance performance testing device for fixed-wing aircraft, comprising a base, a frame, a motor, fan blades, and a support frame. The frame is fixedly installed at one end of the upper surface of the base, the support frame is fixedly installed inside the frame, the motor is fixedly installed on the middle surface of the support frame, and the fan blades are fixedly installed at the output end of the motor. An aircraft model is set on the base, which is equipped with an air outlet mechanism, an elastic mechanism, a fixing mechanism, a driving mechanism, a retaining mechanism, a fastening mechanism, a guiding mechanism, and a sealing mechanism. The air outlet mechanism includes an air outlet duct, a wind deflector, and blades. This invention, a wind resistance performance testing device for fixed-wing aircraft, by setting a wind deflector and blades, causes the wind deflector to rotate when the airflow flows through the air outlet duct. At the same time, the airflow drives the blades to rotate, knocking the wind deflector open. This repetitive motion makes the airflow blowing out of the air outlet duct unstable, thus simulating irregular airflow in the natural environment.

Description

Technical Field

[0001] This invention relates to the field of aircraft testing technology, and in particular to a device for testing the wind resistance performance of fixed-wing aircraft. Background Technology

[0002] A fixed-wing aircraft is a type of heavier-than-air aircraft that flies in the air by using a power plant to generate forward thrust or pull and fixed wings to generate lift.

[0003] Before and after the completion of fixed-wing aircraft production, the aircraft or aircraft model needs to undergo wind resistance testing. Therefore, a fixed-wing aircraft wind resistance testing device is a device that can simulate and control wind force to test the aircraft. However, some problems still exist in the practical use of fixed-wing aircraft wind resistance testing devices:

[0004] Because airflow in nature is not continuous and stable, fixed-wing aircraft experience complex airflow during actual flight. These disturbances make them susceptible to the aircraft's performance. However, existing wind resistance testing devices for fixed-wing aircraft rely on motors to drive fan blades, resulting in airflow that fails to simulate the irregular airflow found in nature. Furthermore, while fixing the aircraft model to the front of the fan blades requires a securing mechanism, vibrations during wind resistance testing can easily cause the securing mechanism to loosen, making stable fixation impossible. Additionally, the wind generated by the rotating fan blades is directly in front of the aircraft model during testing, failing to change the wind direction and thus reducing the testing range for wind resistance performance. Summary of the Invention

[0005] The purpose of this invention is to provide a wind resistance performance testing device for fixed-wing aircraft, which solves the problems of the airflow generated by the wind resistance performance testing device mentioned above, which is difficult to simulate the irregular air flow in nature. At the same time, the aircraft will vibrate during the wind resistance performance testing process, which can easily cause the fixing mechanism to loosen and make it impossible to stably fix the aircraft. In addition, the wind direction cannot be changed during the wind resistance performance testing, which reduces the range of the aircraft's wind resistance performance testing.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a fixed-wing aircraft wind resistance performance testing device, comprising a base, a frame, a motor, fan blades, and a support frame. The frame is fixedly installed at one end of the upper surface of the base, the support frame is fixedly installed inside the frame, the motor is fixedly installed on the middle surface of the support frame, the fan blades are fixedly installed at the output end of the motor, an aircraft model is provided on the base, and the base is provided with an air outlet mechanism, an elastic mechanism, a fixing mechanism, a drive mechanism, a positioning mechanism, a fastening mechanism, a guiding mechanism, and a closing mechanism.

[0007] The air outlet mechanism includes an air outlet duct, a baffle plate, and blades. The air outlet duct is fixedly installed on the surface of the frame. Multiple central shafts are rotatably installed inside the air outlet duct. The baffle plate is fixedly installed on the surface of the central shaft. Multiple rotating shafts are rotatably installed inside the air outlet duct. Multiple blades are fixedly installed on the surface of the rotating shafts. The number of baffle plates is equal to the number of rotating shafts. The airflow causes the baffle plate to rotate, which in turn drives the blades to rotate and knock the baffle plate open. This makes the airflow blowing out of the air outlet duct unstable, simulating the irregular airflow in the natural environment.

[0008] As a preferred embodiment of the present invention, the elastic mechanism includes a push block and a first spring. Multiple first springs are fixedly installed on the surface of the blade. The push block is fixedly installed on the end of the first spring away from the blade. A slider is fixedly installed on the surface of the blade. The slider is slidably installed inside the push block. The first spring can play a buffering role when impacting the wind deflector, reducing the impact on the wind deflector.

[0009] As a preferred embodiment of the present invention, the fixing mechanism includes a pressing plate, a first screw and a rotating plate. The rotating plate is fixedly installed at one end of the central shaft. A first support plate is fixedly installed on the outer surface of the air outlet duct. The first screw is threaded into the inner part of the first support plate. The pressing plate is rotatably installed at the end of the first screw near the rotating plate. The pressing plate can cause the rotating plate to rotate the baffle plate to a parallel state.

[0010] As a preferred embodiment of the present invention, the driving mechanism includes a first bevel gear and a second bevel gear. The first bevel gear is fixedly installed on the end of the first screw away from the pressing plate. A slide rail is fixedly installed on the outer surface of the air outlet duct. A sliding plate is slidably installed on the surface of the slide rail. A connecting shaft is rotatably installed on the surface of the sliding plate. The second bevel gear is fixedly sleeved on the surface of the connecting shaft. The first bevel gear and the second bevel gear mesh. A rocker arm is fixedly installed on the end of the connecting shaft away from the sliding plate.

[0011] As a preferred embodiment of the present invention, the fixing mechanism includes a first clamping plate, a second clamping plate, and a second spring. A support rod is fixedly installed at the end of the base away from the frame. A first connecting plate is fixedly installed at the upper end of the support rod. The cross-sectional shape of the first connecting plate is triangular. The three first clamping plates and the first connecting plate are respectively fixedly installed at the three corners of the first connecting plate. A second connecting plate is fixedly installed at each of the three corners of the first connecting plate. The second clamping plate and the surface of the second connecting plate are slidably fitted together. A second support plate is fixedly installed at the end of the second connecting plate away from the first clamping plate. The two ends of the second spring are respectively fixedly installed at the surfaces of the second support plate and the second clamping plate. The airplane model can be clamped by pushing the first clamping plate and the second clamping plate with the second spring.

[0012] As a preferred embodiment of the present invention, the fastening mechanism includes a pressing block and a driving blade, a first connecting frame is fixedly mounted on the surface of the second connecting plate, and a second screw is inserted into the internal thread of the first connecting frame.

[0013] As a preferred embodiment of the present invention, the extrusion block is rotatably mounted to the end of the second screw near the first connecting plate, and an extrusion plate is fixedly mounted on the surface of the second clamping plate. The cross-sectional shape of the extrusion plate and the extrusion block are both right-angled trapezoids. The drive blade is fixedly mounted to the end of the second screw away from the extrusion block. The airflow will drive the drive blade and the second screw to rotate, so that the extrusion block and the extrusion plate are pressed together. As the airflow flows, the first clamping plate and the second clamping plate are more firmly fixed to the aircraft tail fin, preventing loosening.

[0014] As a preferred technical solution of the present invention, the guiding mechanism includes an air guide pipe and an air collecting hopper. There are two air guide pipes, which are fixedly installed on both sides inside the air outlet pipe. The air collecting hopper is connected to the side of the guide pipe inside the air outlet pipe. When the airflow is blown out from the air guide pipe, it will blow to the side of the aircraft model to change the direction of the airflow and increase the range of the aircraft's wind resistance performance test.

[0015] As a preferred embodiment of the present invention, the sealing mechanism includes a windbreak block and a limiting block. There are two windbreak blocks, which are respectively inserted into the interior of the top ends of both sides of the air outlet duct. The cross-sectional shape of the windbreak block is a right-angled triangle. A bracket is fixedly installed on the top of the air outlet duct. A second connecting frame is inserted into the interior of the two short arms of the bracket. A long plate is fixedly installed on the long arm of the second connecting frame, so that the windbreak block blocks the opening end of the air collecting hopper, making it difficult for airflow to enter the air guide duct.

[0016] As a preferred embodiment of the present invention, a limiting block is fixedly installed on the surface of the long plate, the limiting block is inserted into the interior of the lower end of the wind deflector, and an elastic rope is fixedly installed between the bracket and the long plate. The limiting block can be pulled into the wind deflector block by the elastic rope to fix the wind deflector block.

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

[0018] 1. This invention, by setting up a baffle plate, blades and a rotating plate, causes the baffle plate to rotate when the airflow flows in the air outlet duct. At the same time, the airflow drives the blades to rotate and knock the baffle plate open. This repetitive process makes the airflow blown out of the air outlet duct unstable, so as to simulate the irregular airflow in the natural environment. The rotating plate can be pressed to make the baffle plate rotate to a parallel state, and the baffle plate can be fixed to reduce the disturbance of the airflow by the baffle plate.

[0019] 2. By setting up a first clamping plate, a second clamping plate, a drive blade, and a screw, the airflow will drive the drive blade and the second screw to rotate, so that the extrusion block and the extrusion plate are pressed together to push the second clamping plate and the first clamping plate to clamp the tail of the aircraft model. In this way, as the airflow flows, the first clamping plate and the second clamping plate are more firmly fixed to the tail of the aircraft, preventing loosening.

[0020] 3. By setting up an air guide duct and a wind deflector, since the outlet end of the air guide duct is aligned with the side of the aircraft model, when the airflow blows out from the air guide duct, it will blow to the side of the aircraft model to change the direction of the airflow, increase the range of the aircraft's wind resistance performance detection, and make the wind deflector move downward to block the opening end of the air collection bucket, making it difficult for the airflow to enter the air guide duct. Attached Figure Description

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

[0022] Figure 2 This is a schematic diagram of the framework portion of the present invention;

[0023] Figure 3 This is a schematic diagram of the air outlet duct section of the present invention;

[0024] Figure 4 This is a schematic diagram of the structure of the rotating shaft part of the present invention;

[0025] Figure 5 This is a schematic diagram of the rotating plate portion of the present invention;

[0026] Figure 6 For the present invention Figure 4 Enlarged view of point A in the middle;

[0027] Figure 7 For the present invention Figure 1 Enlarged view at point B in the middle;

[0028] Figure 8 This is a schematic diagram of the structure of the first connecting plate portion of the present invention;

[0029] Figure 9 For the present invention Figure 8 Enlarged view at point C;

[0030] Figure 10 This is a schematic diagram of the air duct section of the present invention;

[0031] Figure 11 For the present invention Figure 10 Enlarged view at point D;

[0032] Figure 12 This is a schematic diagram of the air collecting bucket part of the present invention.

[0033] In the diagram: 1. Airplane model; 201. Air outlet duct; 202. Wind deflector; 203. Rotating shaft; 204. Blade; 205. Push block; 206. Rotating plate; 207. Central shaft; 208. Pressing plate; 209. First spring; 210. First screw; 211. First support plate; 212. First bevel gear; 213. Second bevel gear; 214. Connecting shaft; 215. Sliding plate; 216. Slide rail; 217. Rocker arm; 218. Slider; 301. First connecting plate; 302. Support rod; 30 3. First clamping plate; 304. Second clamping plate; 305. Second connecting plate; 306. Second spring; 307. Second support plate; 308. First connecting frame; 309. Extrusion plate; 310. Extrusion block; 311. Second screw; 312. Drive blade; 401. Wind baffle; 402. Air guide pipe; 403. Air collecting hopper; 404. Second connecting frame; 405. Bracket; 406. Elastic rope; 407. Long plate; 408. Limiting block; 5. Base; 6. Frame; 7. Motor; 8. Fan blade; 9. Support frame. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Please see Figure 1-12 This invention provides a technical solution for a fixed-wing aircraft wind resistance performance testing device:

[0036] Example 1:

[0037] according to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, a fixed-wing aircraft wind resistance performance testing device includes a base 5, a frame 6, a motor 7, a fan blade 8, and a support frame 9. The frame 6 is fixedly installed on one end of the upper surface of the base 5, the support frame 9 is fixedly installed inside the frame 6, the motor 7 is fixedly installed on the middle surface of the support frame 9, and the fan blade 8 is fixedly installed on the output end of the motor 7. An aircraft model 1 is provided on the base 5, and the base 5 is provided with an air outlet mechanism, an elastic mechanism, a fixing mechanism, a drive mechanism, a positioning mechanism, a fastening mechanism, a guiding mechanism, and a closing mechanism.

[0038] The air outlet mechanism includes an air outlet duct 201, a baffle plate 202, and blades 204. The air outlet duct 201 is fixedly installed on the surface of the frame 6. Multiple central shafts 207 are rotatably installed inside the air outlet duct 201. The baffle plate 202 is fixedly installed on the surface of the central shaft 207. Multiple rotating shafts 203 are rotatably installed inside the air outlet duct 201. Multiple blades 204 are fixedly installed on the surface of the rotating shafts 203. The airflow causes the baffle plate 202 to rotate, which in turn drives the blades 204 to rotate and knock the baffle plate 202 open. This can make the airflow blown out of the air outlet duct 201 unstable, simulating the irregular airflow in the natural environment. The number of baffle plates 202 is equal to the number of rotating shafts 203.

[0039] The elastic mechanism includes a push block 205 and a first spring 209. Multiple first springs 209 are fixedly installed on the surface of the blade 204. The first springs 209 can buffer the impact when hitting the wind deflector 202, reducing the impact on the wind deflector 202. The push block 205 is fixedly installed on the end of the first spring 209 away from the blade 204. A slider 218 is fixedly installed on the surface of the blade 204. The slider 218 is slidably installed inside the push block 205.

[0040] The fixing mechanism includes a pressing plate 208, a first screw 210, and a rotating plate 206. The rotating plate 206 is fixedly installed at one end of the central shaft 207. The pressing plate 208 can cause the rotating plate 206 to drive the baffle plate 202 to rotate to a parallel state. A first support plate 211 is fixedly installed on the outer surface of the air outlet duct 201. The first screw 210 is threaded into the first support plate 211. The first screw 210 can fix the baffle plate 202 and reduce the disturbance of the airflow by the baffle plate 202. The pressing plate 208 and the first screw 210 are rotatably installed at the end near the rotating plate 206.

[0041] The driving mechanism includes a first bevel gear 212 and a second bevel gear 213. The first bevel gear 212 is fixedly installed at the end of the first screw 210 away from the pressing plate 208. A slide rail 216 is fixedly installed on the outer surface of the air outlet duct 201. A sliding plate 215 is slidably installed on the surface of the slide rail 216. A connecting shaft 214 is rotatably installed on the surface of the sliding plate 215. The second bevel gear 213 is fixedly sleeved with the surface of the connecting shaft 214. The first bevel gear 212 and the second bevel gear 213 mesh with each other. By rotating the first bevel gear 212 and the second bevel gear 213, the pressing plate 208 can be moved. A rocker arm 217 is fixedly installed at the end of the connecting shaft 214 away from the sliding plate 215.

[0042] In practical use, the wind resistance performance testing device for fixed-wing aircraft of this invention uses the airflow generated by the rotation of fan blades 8 driven by motor 7 to test wind resistance. When the airflow flows through the air outlet duct 201, it blows open the wind deflector 202, causing it to rotate about the central axis 207 towards the aircraft model 1. Simultaneously, the airflow causes the blades 204 to rotate. When the wind deflector 202 contacts the pushing block 205, the rapidly rotating pushing block 205 impacts the wind deflector 202, causing it to open. The wind deflector 202 is then blown open again by the airflow, and this process repeats. The irregular rotation of the wind deflector 202 is used to test wind resistance. The airflow blown out of the air duct 201 becomes unstable to simulate irregular airflow in the natural environment. When it is not necessary to use irregular airflow to test the wind resistance performance, the rocker arm 217 can drive the second bevel gear 213 and the first bevel gear 212 to rotate, thereby causing the first screw 210 to drive the pressing plate 208 to move towards the rotating plate 206. The pressing plate 208 squeezes the rotating plate 206. Since the pressing plate 208 is in a bent state, the rotating plate 206 can be rotated downward by squeezing, while the wind deflector 202 is rotated to a parallel state and fixed. This reduces the obstruction of the airflow by the wind deflector 202 and reduces the disturbance of the airflow by the wind deflector.

[0043] Example 2:

[0044] Based on Example 1, such as Figure 8 and Figure 9As shown, the fixing mechanism includes a first clamping plate 303, a second clamping plate 304, and a second spring 306. A support rod 302 is fixedly installed at the end of the base 5 away from the frame 6. A first connecting plate 301 is fixedly installed at the upper end of the support rod 302. The cross-sectional shape of the first connecting plate 301 is triangular. The three first clamping plates 303 and the first connecting plate 301 are respectively fixedly installed at the three corners of the first connecting plate 301. A second connecting plate 305 is fixedly installed at each of the three corners of the first connecting plate 301. The second clamping plate 304 slides on the surface of the second connecting plate 305. A second support plate 307 is fixedly installed at the end of the second connecting plate 305 away from the first clamping plate 303. The two ends of the second spring 306 are respectively fixedly installed on the surfaces of the second support plate 307 and the second clamping plate 304. The aircraft model 1 can be clamped by pushing the first clamping plate 303 and the second clamping plate 304 through the second spring 306.

[0045] The fastening mechanism includes a pressing block 310 and a drive blade 312. A first connecting frame 308 is fixedly installed on the surface of the second connecting plate 305. A second screw 311 is inserted into the internal thread of the first connecting frame 308. The pressing block 310 and the second screw 311 are rotatably installed at the end near the first connecting plate 301. A pressing plate 309 is fixedly installed on the surface of the second clamping plate 304. The cross-sectional shape of the pressing plate 309 and the pressing block 310 is a right trapezoid. The drive blade 312 and the end of the second screw 311 away from the pressing block 310 are fixedly installed. The airflow will drive the drive blade 312 and the second screw 311 to rotate, so that the pressing block 310 and the pressing plate 309 are pressed against each other. With the flow of airflow, the first clamping plate 303 and the second clamping plate 304 are more firmly fixed to the aircraft tail, preventing loosening.

[0046] In practical use, the wind resistance performance testing device for fixed-wing aircraft of the present invention, when it is necessary to fix the aircraft model 1, can insert the three tail fins of the aircraft model 1 into the three first clamping plates 303 and second clamping plates 304 respectively. Then, the second spring 306 applies a force to the second clamping plate 304 in the direction close to the first clamping plate 303, thereby clamping the aircraft model 1 by the first clamping plate 303 and the second clamping plate 304. When the airflow blows over the aircraft model 1, the airflow will drive the drive blade 312 to rotate and drive the second screw 311 to rotate, causing the pressing block 310 to move towards the first connecting plate 301. This causes the pressing block 310 and the inclined surface on the pressing plate 309 to stick and press against each other, pushing the second clamping plate 304 towards the first clamping plate 303. In this way, as the airflow flows, the first clamping plate 303 and the second clamping plate 304 fix the aircraft tail fins more firmly, preventing loosening.

[0047] Example 3:

[0048] Based on Example 1, such as Figure 10 , Figure 11 and Figure 12 As shown, the guiding mechanism includes an air duct 402 and an air collecting hopper 403. There are two air ducts 402, which are fixedly installed on both sides inside the air outlet duct 201. The air collecting hopper 403 is connected to the guide tube on one side inside the air outlet duct 201. When the airflow blows out from the air duct 402, it will blow to the side of the aircraft model 1 to change the direction of the airflow and increase the range of the aircraft's wind resistance performance test.

[0049] The sealing mechanism includes two wind baffles 401 and two limiting blocks 408. The two wind baffles 401 are inserted into the interior of the top ends of both sides of the air outlet duct 201, blocking the opening of the air collecting hopper 403 and making it difficult for airflow to enter the air guide duct 402. The cross-sectional shape of the wind baffle 401 is a right-angled triangle, which reduces obstruction to airflow. A support is fixedly installed at the top of the air outlet duct 201. The bracket 405 has a second connecting bracket 404 inserted inside the two short arm ends. The long arm end of the second connecting bracket 404 is fixedly installed with a long plate 407. A limit block 408 is fixedly installed on the surface of the long plate 407. The limit block 408 is inserted into the interior of the lower end of the wind deflector. An elastic rope 406 is fixedly installed between the bracket 405 and the long plate 407. The limit block 408 can be pulled into the wind deflector 401 by the elastic rope 406, thus fixing the wind deflector 401.

[0050] In practical use, the wind resistance performance testing device for fixed-wing aircraft of the present invention, when conducting wind resistance performance testing, the airflow enters the air duct 402 through the wind collecting hopper 403. Since the outlet end of the air duct 402 is aligned with the side of the aircraft model 1, when the airflow blows out from the air duct 402, it will blow to the side of the aircraft model 1 through the air duct 402 to change the direction of the airflow and increase the range of the aircraft's wind resistance performance testing. When it is not necessary to blow air towards the side of the aircraft, the limiting block 408 can be pulled out from the wind deflector block 401 to release the fixation of the wind deflector block 401, and then the wind deflector block 401 can be moved downward to the bottom of the air outlet duct 201 so that the wind deflector block 401 just blocks the opening end of the wind collecting hopper 403, making it difficult for the airflow to enter the air duct 402.

[0051] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A fixed-wing aircraft wind resistance performance detection device, comprising a base (5), a frame (6), a motor (7), a fan blade (8) and a support frame (9), characterized in that: The frame (6) is fixedly installed on one end of the upper surface of the base (5), the support frame (9) is fixedly installed inside the frame (6), the motor (7) is fixedly installed on the surface of the middle part of the support frame (9), the fan blade (8) is fixedly installed on the output end of the motor (7), the base (5) is provided with an airplane model (1), and the base (5) is provided with an air outlet mechanism, an elastic mechanism, a fixing mechanism, a driving mechanism, a retaining mechanism, a fastening mechanism, a guide mechanism and a sealing mechanism. The air outlet mechanism comprises an air outlet pipeline (201), a wind shield (202) and a blade (204), the air outlet pipeline (201) is fixedly installed on the surface of the frame (6), a plurality of central shafts (207) are rotatably installed inside the air outlet pipeline (201), the wind shield (202) is fixedly installed on the surface of the central shaft (207), a plurality of rotating shafts (203) are rotatably installed inside the air outlet pipeline (201), and a plurality of the blades (204) are fixedly installed on the surface of the rotating shaft (203); the number of the wind shield (202) is equal to the number of the rotating shaft (203); The elastic mechanism comprises a pushing block (205) and a first spring (209), a plurality of the first springs (209) are fixedly installed on the surface of the blade (204), the pushing block (205) is fixedly installed on the end, away from the blade (204), of the first spring (209), a sliding block (218) is fixedly installed on the surface of the blade (204), and the sliding block (218) is slidably installed inside the pushing block (205); The fixing mechanism comprises a pressing plate (208), a first screw rod (210) and a rotating plate (206), the rotating plate (206) is fixedly installed on one end of the central shaft (207), a first supporting plate (211) is fixedly installed on the outer surface of the air outlet pipeline (201), the first screw rod (210) is threadedly inserted into the inside of the first supporting plate (211), and the pressing plate (208) is rotatably installed on the end, close to the rotating plate (206), of the first screw rod (210); The driving mechanism comprises a first bevel gear (212) and a second bevel gear (213), the first bevel gear (212) is fixedly installed on the end, away from the pressing plate (208), of the first screw rod (210), a sliding rail (216) is fixedly installed on the outer surface of the air outlet pipeline (201), a sliding plate (215) is slidably installed on the surface of the sliding rail (216), a connecting shaft (214) is rotatably installed on the surface of the sliding plate (215), the second bevel gear (213) is fixedly sleeved on the surface of the connecting shaft (214), the first bevel gear (212) is engaged with the second bevel gear (213), and a rocker (217) is fixedly installed on the end, away from the sliding plate (215), of the connecting shaft (214). The retaining mechanism comprises a first clamping plate (303), a second clamping plate (304) and a second spring (306), one end of the base (5) away from the frame (6) is fixedly installed with a supporting rod (302), the upper end of the supporting rod (302) is fixedly installed with a first connecting plate (301), the cross section shape of the first connecting plate (301) is triangular, three first clamping plates (303) and first connecting plates (301) are respectively fixedly installed with three corners of the first connecting plate (301), the three corner parts of the first connecting plate (301) are all fixedly installed with second connecting plates (305), the surface of the second connecting plate (304) is slidably sleeved with the second connecting plate (305), one end of the second connecting plate (305) away from the first clamping plate (303) is fixedly installed with a second supporting plate (307), the two ends of the second spring (306) are respectively fixedly installed with the surface of the second supporting plate (307) and the second clamping plate (304); The fastening mechanism comprises an extrusion block (310) and a driving blade (312), the surface of the second connecting plate (305) is fixedly installed with a first connecting frame (308), the inside of the first connecting frame (308) is threadedly inserted with a second screw rod (311); The extrusion block (310) is rotatably installed at one end of the second screw rod (311) close to the first connecting plate (301), the surface of the second clamping plate (304) is fixedly installed with an extrusion plate (309), the cross section shape of the extrusion plate (309) and the extrusion block (310) are both right trapezoids, and the driving blade (312) is fixedly installed at one end of the second screw rod (311) away from the extrusion block (310); The guiding mechanism comprises an air guide pipe (402) and a wind collecting hopper (403), the number of the air guide pipe (402) is two, and the two air guide pipes (402) are fixedly installed at the two sides in the inside of the air outlet pipeline (201), and the wind collecting hopper (403) is connected in communication with the side of the air guide pipe in the inside of the air outlet pipeline (201); The closing mechanism comprises a wind blocking block (401) and a limiting block (408), the number of the wind blocking block (401) is two, the two wind blocking blocks (401) are respectively inserted in the inside of the top of the two sides of the air outlet pipeline (201), the cross section shape of the wind blocking block (401) is a right triangle, the top of the air outlet pipeline (201) is fixedly installed with a support (405), the inside of the two short arm ends of the support (405) is all inserted with a second connecting frame (404), the long arm end of the second connecting frame (404) is fixedly installed with a long plate (407); The surface of the long plate (407) is fixedly installed with the limiting block (408), the limiting block (408) is inserted in the inside of the lower end of the wind blocking pipe, and the elastic rope (406) is fixedly installed between the support (405) and the long plate (407).

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