A ventilated high sound insulation silencing device

Abstract

The present application relates to the technical field of silencing equipment, and discloses a ventilated high sound insulation silencing device, comprising a noise reduction box and sound-absorbing cotton arranged inside the noise reduction box, and also comprising an air intake component, a blocking component and a noise reduction component, wherein the air intake component is arranged inside the noise reduction box, and is used to uniformly discharge the wind discharged from the factory into the noise reduction box, the blocking component is arranged inside the noise reduction box, and is used to increase the flow speed of the airflow inside the noise reduction box, and the noise reduction component is arranged inside the noise reduction box, and is used to disturb the airflow inside the noise reduction box to realize the multi-angle return of the airflow inside the noise reduction box. The present application can divide the wind discharged from the factory into multiple streams and spray them uniformly into the noise reduction box to uniformly contact the sound-absorbing cotton, and can refract the noise generated by the airflow at multiple angles, so as to greatly eliminate the noise generated by the airflow to avoid causing environmental noise pollution, and at least solve the technical problem that the noise reduction effect of the silencing device in the prior art is poor.

Description

Technical Field

[0001] The present application relates to the technical field of silencing equipment, and in particular to a ventilated silencing device with high sound insulation. Background Art

[0002] Factory buildings are various houses directly used for production or supporting production, including main workshops, auxiliary rooms and ancillary facilities. All factory buildings in industrial, transportation, commercial, construction, scientific research, schools and other units should be included. In addition to workshops used for production, industrial factories also include their ancillary buildings. Factory buildings are generally equipped with air inlets and air inlet pipes to draw in fresh air for air replacement and purification. Nowadays, ventilation shutters are arranged in factory buildings. After the ventilation shutters are arranged, the noise will be directly transmitted to the outside of the factory building, so it will directly affect the noise occupational health of other units outside. Therefore, it is necessary to arrange high sound insulation silencers to reduce outdoor noise.

[0003] The current silencer has the following defects during use: 1. The wind discharged from the factory exhaust pipe is generally discharged from one nozzle, so the high-pressure discharged wind will produce a sonic boom, which is not convenient for eliminating the generated noise; 2. Because the sound-absorbing cotton in the silencer is fixed in position, when the discharged wind contacts the stationary sound-absorbing cotton, the noise cannot be refracted and consumed at multiple angles, and thus the noise cannot be quickly eliminated. Summary of the invention

[0004] One purpose of the present application is to provide a ventilated high sound insulation silencer, at least to solve the technical problem that the current silencer has poor noise reduction effect.

[0005] To achieve the above objectives, some implementation examples of this application provide the following aspects:

[0006] In a first aspect, some implementation examples of the present application provide a ventilated high sound insulation noise reduction device, including a noise reduction box and sound absorbing cotton arranged inside the noise reduction box, and also including:

[0007] An air inlet assembly, which is arranged inside the noise reduction box and is used to evenly discharge the air exhausted from the factory into the noise reduction box;

[0008] A blocking component, which is arranged inside the noise reduction box and is used to increase the flow speed of the airflow inside the noise reduction box;

[0009] The noise reduction component is arranged inside the noise reduction box and is used to disturb the airflow inside the noise reduction box so as to realize multi-angle return of the airflow inside the noise reduction box.

[0010] As a preferred technical solution of the present application, the air inlet assembly includes an air inlet frame arranged at the bottom of the noise reduction box, a flow chamber opened on the inner wall of the noise reduction box and connected to the air inlet frame, a plurality of partitions arranged on the inner wall of the flow chamber, a rotating tube rotatably arranged on the side wall of the noise reduction box and extending to the interior thereof, a plurality of air nozzles arranged on the outer wall of the rotating tube, a connecting piece arranged between the rotating tube and the flow chamber, and a transmission assembly arranged at the end of the rotating tube away from the noise reduction box, and slots are opened on the surface of the partition.

[0011] As a preferred technical solution of the present application, the connecting part includes a rotating sleeve rotatably arranged on the rod wall of the rotating tube located inside the noise reduction box, and a connecting tube arranged between the rotating sleeve and the flow chamber, a connecting groove is provided inside the rotating sleeve, and an air inlet hole is opened on the tube wall of the rotating tube located inside the connecting groove.

[0012] As a preferred technical solution of the present application, the blocking assembly includes a plurality of baffles equidistantly arranged on the inner wall of the noise reduction box, a plurality of first rotating shafts rotatably arranged on the inner wall of the noise reduction box between two adjacent baffles, and a plurality of fan blades arranged on the rod wall of the first rotating shaft. Two adjacent baffles are staggered with each other, and the sound-absorbing cotton is arranged on the surface of the baffles and the fan blades.

[0013] As a preferred technical solution of the present application, the noise reduction assembly includes a plurality of refraction plates rotatably arranged at the bottom of the lowest baffle plate on the inner side of the noise reduction box and on the inner bottom wall of the noise reduction box, an elastic net arranged between pairs of relative refraction plates, a rotating rod rotatably arranged on the inner wall of the noise reduction box, a winding wheel arranged on the rod wall of the rotating rod, and a pull rope arranged between the winding wheel and the plurality of elastic nets, and the rotating rod is connected to the transmission assembly.

[0014] As a preferred technical solution of the present application, a filter assembly is also provided at the bottom of the noise reduction box, and the filter assembly includes a filter box arranged at the bottom of the air inlet frame, a mounting frame arranged at the bottom of the filter box, a motor arranged on the outer wall of the filter box, a rotating rod arranged on the output shaft of the motor, and a filter plate arranged on the wall of the rotating rod, and the rotating rod is connected to the transmission assembly.

[0015] As a preferred technical solution of the present application, the inner side wall of the filter box is rotatably connected with a second rotating shaft, a brush plate sleeved on the rod wall of the second rotating shaft, and a spring sleeved on the rod wall of the second rotating shaft.

[0016] As a preferred technical solution of the present application, the transmission assembly includes a transmission rod rotatably arranged on the side wall of the noise reduction box, a belt transmitted between a rotating tube, the transmission rod and a rotating rod, an active bevel gear arranged at one end of the transmission rod located inside the noise reduction box, and a driven bevel gear arranged on the wall of the rotating rod and meshing with the active bevel gear.

[0017] As a preferred technical solution of the present application, the side wall of the noise reduction box is also provided with an exhaust pipe connected thereto, the inner side wall of the exhaust pipe is provided with a bending plate, and an exhaust port is opened on the surface of the bending plate.

[0018] As a preferred technical solution of the present application, the end of the rotating tube away from the belt is provided with a rotating column extending into the exhaust duct, and a sealing plate is provided on the rod wall of the rotating column located inside the exhaust duct.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] First, install the equipment on the factory exhaust duct. Before the wind enters the noise reduction box, it will first enter the filter box. At this time, the dust and impurities in the wind can be filtered and blocked by the filter plate, and the filter plate can be driven to rotate by the motor and rotating rod. Therefore, the wind in the filter box can be stirred to increase the contact strength between the wind and the filter plate, so that the dust and impurities mixed in the wind can be thoroughly cleaned. Moreover, the surface of the rotating filter plate can be wiped by the second rotating shaft, spring and brush plate, so that the dust adhering to the surface of the filter plate can be brushed off to prevent the filter plate from being blocked.

[0021] Through the set air inlet assembly, the filtered wind can enter the rotating tube through the air inlet frame, the flow cavity, the connecting pipe and the rotating sleeve, and then be sprayed into the noise reduction box from the various air nozzles on the rotating tube. At this time, the set transmission assembly can also drive the rotating tube to rotate, and then drive the air nozzle to rotate to blow the wind evenly to the inside of the noise reduction box and contact the sound-absorbing cotton in a large range, thereby preventing the high-pressure airflow from entering the noise reduction box through an air inlet to produce a sonic boom. The set sound-absorbing cotton can eliminate the noise in the wind, and when the wind passes through the flow cavity, the noise in the wind can also be reflected and eliminated through the set partition, and the baffle and fan blades can block the airflow, thereby increasing the residence time of the airflow inside the noise reduction box, making it easier for the sound-absorbing cotton to absorb and eliminate the noise in the airflow completely.

[0022] By setting up the noise reduction component, when the airflow passes between each refraction plate, the transmission component can drive the rotating rod and the winding wheel to rotate back and forth, and the winding wheel will pull the elastic net back and forth through the pull rope, thereby driving each refraction plate to continuously bend and reset, so that the noise in the airflow can be refracted to different angles, further eliminating the noise energy, thereby improving the effect of eliminating the noise in the airflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] One or more implementation examples are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the implementation examples. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0024] Figure 1 This is an overall structural diagram of the ventilation high sound insulation silencing device of the present invention;

[0025] Figure 2 It is an overall structural diagram of the ventilation high sound insulation silencer of the present invention;

[0026] Figure 3 It is an overall structural diagram of the ventilation high sound insulation silencer of the present invention;

[0027] Figure 4 It is a cross-sectional structural diagram of the ventilation high sound insulation silencer of the present invention;

[0028] Figure 5 It is a cross-sectional front view of the ventilated high sound insulation silencer of the present invention;

[0029] Figure 6 This is a structural diagram of the connector of the ventilation high sound insulation silencer of the present invention;

[0030] Figure 7 It is a structural diagram of the noise reduction component of the ventilation high sound insulation silencer of the present invention;

[0031] Figure 8 This is a diagram showing the internal structure of the exhaust duct of the ventilation high sound insulation silencer of the present invention;

[0032] Fig. 9 For the present invention Figure 5 The enlarged structural diagram at A in the middle;

[0033] Fig.10 For the present invention Figure 5 Enlarged structural diagram at point B in the middle.

[0034] Description of reference numerals:

[0035] 1. Noise reduction box; 101. Flow cavity; 102. Partition; 2. Air inlet frame; 3. Rotating pipe; 301. Air nozzle; 302. Air inlet hole; 4. Rotating sleeve; 401. Connecting pipe; 402. Connecting groove; 5. Baffle; 6. First rotating shaft; 601. Fan blade; 7. Refraction plate; 701. Elastic net; 8. Rotating rod; 801. Driven bevel gear; 9. Winding wheel; 901. Pull rope; 10. Filter box; 11. Mounting frame; 12. Motor; 1201. Rotating rod; 1202. Filter plate; 13. Second rotating shaft; 1301. Brush plate; 1302. Spring; 14. Belt; 15. Transmission rod; 1501. Active bevel gear; 16. Exhaust duct; 17. Bending plate; 1701. Exhaust port; 18. Rotating column; 1801. Sealing plate. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical scheme and advantages of the implementation examples of this application clearer, the technical scheme in the implementation examples of this application will be clearly and completely described below in conjunction with the drawings in the implementation examples of this application. Obviously, the described implementation examples are part of the implementation examples of this application, not all of the implementation examples. Based on the implementation examples in this application, all other implementation examples obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0037] First implementation example

[0038] like Figures 1 to 5 As shown, this embodiment proposes a ventilated high sound insulation silencer, including a noise reduction box 1 and sound-absorbing cotton arranged inside the noise reduction box 1, and also includes an air intake component, a blocking component and a noise reduction component. The air intake component is arranged inside the noise reduction box 1, and is used to evenly discharge the wind exhausted from the factory into the noise reduction box 1. The blocking component is arranged inside the noise reduction box 1, and is used to increase the flow speed of the airflow inside the noise reduction box 1. The noise reduction component is arranged inside the noise reduction box 1, and is used to disturb the airflow inside the noise reduction box 1 to realize multi-angle return of the airflow inside the noise reduction box 1.

[0039] First, the device is installed at the exhaust end of the factory. The air inlet component is set up, and the wind can be passed into the noise reduction box 1 from multiple air inlets over a large range and evenly contact the sound-absorbing cotton. This can not only improve the noise absorption effect of the sound-absorbing cotton, but also prevent the high-pressure airflow from passing into the noise reduction box 1 from one air inlet to produce a large sonic boom. Afterwards, the wind flowing inside the noise reduction box 1 can be blocked by the blocking component, and the residence time of the airflow inside the noise reduction box 1 is increased, which further facilitates the sound-absorbing cotton to absorb the noise generated by the airflow. Finally, the noise reduction component can reflect the noise waves generated in the airflow in multiple directions, thereby eliminating the energy of the noise waves and completing the silencing work.

[0040] like Figure 4 and Figure 5 As shown, as a preferred embodiment, on the basis of the above-mentioned manner, further, a filter assembly is further provided at the bottom of the noise reduction box 1, and the filter assembly includes a filter box 10 arranged at the bottom of the air inlet frame 2, a mounting frame 11 arranged at the bottom of the filter box 10, a motor 12 arranged on the outer wall of the filter box 10, a rotating rod 1201 arranged on the output shaft of the motor 12, and a filter plate 1202 arranged on the rod wall of the rotating rod 1201, and the rotating rod 1201 is connected to the transmission assembly;

[0041] The inner wall of the filter box 10 is rotatably connected with a second rotating shaft 13, a brush plate 1301 sleeved on the rod wall of the second rotating shaft 13, and a spring 1302 sleeved on the rod wall of the second rotating shaft 13;

[0042] After being discharged from the factory, the wind will first enter the filter box 10. At this time, the dust impurities in the airflow can be filtered through the filter plate 1202 arranged inside the filter box 10, and the motor 12 can be started to drive the rotating rod 1201 and the filter plate 1202 to rotate. The rotating filter plate 1202 can stir the airflow in the filter box 10, thereby increasing the contact strength between the airflow and the filter plate 1202, which is convenient for better filtering of dust impurities in the wind, and the filter When plate 1202 hits the brush plate 1301 during rotation, the brush plate 1301 will rotate through the spring 1302 and the second rotating shaft 13. When the filter plate 1202 separates from the brush plate 1301, the brush plate 1301 will reverse and reset through the spring 1302 and the second rotating shaft 13. Therefore, the filter plate 1202 will continue to contact with the brush plate 1301. The dust and impurities adhering to the surface of the filter plate 1202 can be brushed off by the brush plate 1301 to prevent the filter plate 1202 from being blocked over time.

[0043] like Figure 4 , Figure 5 , Figure 6 , Fig. 9 and Fig.10 As shown, as a preferred embodiment, on the basis of the above-mentioned method, further, the air inlet assembly includes an air inlet frame 2 arranged at the bottom of the noise reduction box 1, a flow cavity 101 opened on the inner wall of the noise reduction box 1 and connected to the air inlet frame 2, a plurality of partitions 102 arranged on the inner wall of the flow cavity 101, a rotating tube 3 rotatably arranged on the side wall of the noise reduction box 1 and extending to the inside thereof, a plurality of air jets 301 arranged on the outer wall of the rotating tube 3, a connector arranged between the rotating tube 3 and the flow cavity 101, and a transmission assembly arranged at one end of the rotating tube 3 away from the noise reduction box 1, and a slot is opened on the surface of the partition 102;

[0044] The connecting member includes a rotating sleeve 4 rotatably arranged on the rod wall of the rotating tube 3 located inside the noise reduction box 1 and a connecting pipe 401 arranged between the rotating sleeve 4 and the flow chamber 101, a connecting groove 402 is arranged inside the rotating sleeve 4, and an air inlet hole 302 is opened on the tube wall of the rotating tube 3 located inside the connecting groove 402;

[0045] The transmission assembly includes a transmission rod 15 rotatably arranged on the side wall of the noise reduction box 1, a belt 14 arranged between the rotating tube 3, the transmission rod 15 and the rotating rod 1201, a driving bevel gear 1501 arranged on one end of the transmission rod 15 located inside the noise reduction box 1, and a driven bevel gear 801 arranged on the rod wall of the rotating rod 8 and meshing with the driving bevel gear 1501;

[0046] The filtered wind will enter the flow chamber 101 through the air inlet frame 2. At this time, the partition 102 inside the flow chamber 101 can hinder the noise in the airflow and reduce the sound wave energy. Then the airflow will continue to enter the connecting groove 402 inside the rotating sleeve 4 through the connecting pipe 401, and finally enter the rotating pipe 3 through the air inlet hole 302 and spray to the inside of the noise reduction box 1 through a plurality of air nozzles 301. When the motor 12 drives the rotating rod 1201 to rotate, the rotating rod 1201 will also drive the rotating pipe 3 to rotate through the belt 14, so the rotating pipe 3 will drive the plurality of air nozzles 301 to rotate, so that the airflow can be divided into multiple streams and evenly blown to various positions inside the noise reduction box 1, thereby reducing the sonic boom generated by the airflow, and facilitating the uniform contact between the airflow and the sound-absorbing cotton, so that the sound-absorbing cotton can better absorb the noise generated by the airflow. Because the rotating sleeve 4 is rotatably connected to the rotating pipe 3, the rotating sleeve 4 and the connecting pipe 401 will not be driven to rotate when the rotating pipe 3 rotates, thereby not affecting the air intake.

[0047] like Figure 4 and Figure 5 As shown, as a preferred embodiment, on the basis of the above-mentioned method, further, the blocking assembly includes a plurality of baffles 5 equidistantly arranged on the inner wall of the noise reduction box 1, a plurality of first rotating shafts 6 rotatably arranged on the inner wall of the noise reduction box 1 between two adjacent baffles 5, and a plurality of fan blades 601 arranged on the rod wall of the first rotating shaft 6, two adjacent baffles 5 are staggered with each other, and the sound-absorbing cotton is arranged on the surface of the baffle 5 and the fan blade 601;

[0048] After the airflow is evenly passed into the noise reduction box 1, the flow of wind will be hindered by the baffle 5, and when the airflow blows the fan blades 601, it will impact the rotation of the fan blades 601, thereby further blocking the airflow, thereby increasing the time for the airflow to flow in the noise reduction box 1, so that the sound-absorbing cotton has enough time to absorb and eliminate the noise in the airflow.

[0049] like Figure 4 and Figure 7 As shown, as a preferred embodiment, on the basis of the above-mentioned method, further, the noise reduction assembly includes a plurality of refraction plates 7 rotatably arranged at the bottom of the baffle plate 5 at the bottom of the inner side of the noise reduction box 1 and on the inner bottom wall of the noise reduction box 1, elastic nets 701 arranged between the two opposing refraction plates 7, a rotating rod 8 rotatably arranged on the inner side wall of the noise reduction box 1, a winding wheel 9 arranged on the rod wall of the rotating rod 8, and a pull rope 901 arranged between the winding wheel 9 and the plurality of elastic nets 701, and the rotating rod 8 is connected to the transmission assembly;

[0050] After the airflow passes through the baffle 5, it will continue to flow toward the plurality of refraction plates 7. At this time, the motor 12 drives the rotating rod 1201 to rotate forward and backward, and the rotating rod 1201 drives the transmission rod 15 to rotate back and forth through the belt 14. The transmission rod 15 then drives the rotating rod 8 provided with a driven bevel gear 801 to rotate back and forth through the active bevel gear 1501, thereby driving the winding wheel 9 to rotate back and forth to continuously retract and release the pull rope 901, thereby continuously pulling the elastic net 701 and driving the refraction plate 7 to continuously bend. The airflow will pass through the elastic net 701, and the noise generated by the airflow will be reflected in all directions through the continuously bent refraction plate 7, thereby eliminating the energy of the noise and further improving the noise reduction effect of the airflow.

[0051] like Figure 8 As shown, as a preferred embodiment, on the basis of the above-mentioned manner, further, the side wall of the noise reduction box 1 is further provided with an exhaust duct 16 connected thereto, the inner side wall of the exhaust duct 16 is provided with a bent plate 17, and the surface of the bent plate 17 is provided with an exhaust port 1701;

[0052] The end of the rotating tube 3 away from the belt 14 is provided with a rotating column 18 extending into the exhaust cylinder 16, and a sealing plate 1801 is provided on the rod wall of the rotating column 18 located inside the exhaust cylinder 16;

[0053] Finally, the airflow after noise reduction will enter the exhaust duct 16 and be discharged to the outside from the exhaust duct 16. When the airflow passes through the exhaust duct 16, the noise sound waves in the airflow can be reflected again by the bending plate 17 to consume the noise energy. In addition, the rotating tube 3 will drive the sealing plate 1801 to rotate through the rotating column 18 to intermittently seal the outlet of the exhaust duct 16, thereby reducing the speed of the airflow flowing out of the exhaust duct 16, so that the bending plate 17 can better reflect and consume the noise sound waves in the airflow.

[0054] The working principle of the present invention is as follows: first, the device is installed at the exhaust end of the factory through the installation frame 11, and then the wind will first enter the filter box 10 after being discharged from the factory. At this time, the dust and impurities in the airflow can be filtered through the filter plate 1202 arranged inside the filter box 10, and the motor 12 can be started to drive the rotating rod 1201 and the filter plate 1202 to rotate. The rotating filter plate 1202 can stir the airflow in the filter box 10, thereby increasing the contact strength between the airflow and the filter plate 1202, which is convenient for better filtering of dust and impurities in the wind. After that, the filtered wind will pass through the air inlet frame 2 and enter the flow chamber 101. At this time, the partition 102 inside the flow chamber 101 can hinder the noise in the airflow and reduce the sound wave energy. Then the airflow will continue to pass through the connecting pipe 401 and enter the connecting groove 402 inside the rotating sleeve 4, and finally pass through the air inlet hole 302 into the rotating tube 3 and spray to the inside of the noise reduction box 1 through a plurality of air nozzles 301. When the motor 12 drives the rotating rod 1201 to rotate, the rotating rod 1201 will also drive the rotating tube 3 to rotate through the belt 14, so the rotating tube 3 will drive the plurality of air nozzles 301 to rotate, so that the airflow can be divided into multiple streams and evenly blown to various positions inside the noise reduction box 1, thereby reducing the sonic boom generated by the airflow, and also facilitating the uniform contact between the airflow and the sound-absorbing cotton, so that the sound-absorbing cotton can better absorb the noise generated by the airflow. Because the rotating sleeve 4 is rotatably connected to the rotating tube 3, the rotating tube 3 will not drive the rotating sleeve 4 and the connecting pipe 401 to rotate when it rotates, thereby not affecting the air intake. After the airflow is evenly passed into the noise reduction box 1, the flow of wind will be hindered by the baffle 5, and when the airflow blows the fan blades 601, it will impact the rotation of the fan blades 601, thereby further blocking the airflow, thereby increasing the time for the airflow to flow in the noise reduction box 1, so that the sound-absorbing cotton has enough time to absorb and eliminate the noise in the airflow. After the airflow passes through the baffle 5, it will continue to flow toward the plurality of refraction plates 7. At this time, the motor 12 drives the rotating rod 1201 to rotate forward and backward, and the rotating rod 1201 drives the transmission rod 15 to rotate back and forth through the belt 14. The transmission rod 15 then drives the rotating rod 8 provided with a driven bevel gear 801 to rotate back and forth through the active bevel gear 1501, thereby driving the winding wheel 9 to rotate back and forth to continuously retract and release the pull rope 901, thereby continuously pulling the elastic net 701 and driving the refraction plate 7 to continuously bend. The airflow will pass through the elastic net 701, and the noise generated by the airflow will be reflected in all directions through the continuously bent refraction plate 7, thereby eliminating the energy of the noise and further improving the noise reduction effect of the airflow.Finally, the airflow after noise reduction will enter the exhaust duct 16 and be discharged to the outside from the exhaust duct 16. When the airflow passes through the exhaust duct 16, the noise sound waves in the airflow can be reflected again by the bending plate 17 to consume the noise energy. In addition, the rotating tube 3 will drive the sealing plate 1801 to rotate through the rotating column 18 to intermittently seal the outlet of the exhaust duct 16, thereby reducing the speed of the airflow flowing out of the exhaust duct 16, so that the bending plate 17 can better reflect and consume the noise sound waves in the airflow.

[0055] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily mention changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims, and the above implementation examples should be regarded as exemplary and non-restrictive.

Claims

1. A ventilated high sound insulation silencing device, comprising a noise reduction box (1) and sound absorbing cotton arranged inside the noise reduction box (1), characterized in that: Also includes: An air intake assembly, the air intake assembly being arranged inside the noise reduction box (1) and being used to evenly discharge air exhausted from the factory into the noise reduction box (1); A blocking component, the blocking component is arranged inside the noise reduction box (1) and is used to increase the flow speed of the airflow inside the noise reduction box (1); the blocking component comprises a plurality of baffles (5) equidistantly arranged on the inner wall of the noise reduction box (1), a plurality of first rotating shafts (6) rotatably arranged on the inner wall of the noise reduction box (1) between two adjacent baffles (5), and a plurality of fan blades (601) arranged on the rod wall of the first rotating shaft (6), two adjacent baffles (5) are staggered with each other, and the sound-absorbing cotton is arranged on the surface of the baffle (5) and the fan blade (601); A noise reduction component is disposed inside a noise reduction box (1) and is used to disturb the airflow inside the noise reduction box (1) so as to realize multi-angle return of the airflow inside the noise reduction box (1); the noise reduction component comprises a plurality of refraction plates (7) rotatably disposed at the bottom of a baffle (5) at the bottom of the inner side of the noise reduction box (1) and on the inner bottom wall of the noise reduction box (1), an elastic net (701) disposed between two opposing refraction plates (7), a rotating rod (8) rotatably disposed on the inner side wall of the noise reduction box (1), a winding wheel (9) disposed on the rod wall of the rotating rod (8), and a pull rope (901) disposed between the winding wheel (9) and the plurality of elastic nets (701), wherein the rotating rod (8) is connected to a transmission component.

2. A ventilated high sound insulation silencing device according to claim 1, characterized in that: The air inlet assembly comprises an air inlet frame (2) arranged at the bottom of the noise reduction box (1), a flow chamber (101) opened on the inner wall of the noise reduction box (1) and connected to the air inlet frame (2), a plurality of partitions (102) arranged on the inner wall of the flow chamber (101), a rotating tube (3) rotatably arranged on the side wall of the noise reduction box (1) and extending into the interior thereof, a plurality of air jets (301) arranged on the outer wall of the rotating tube (3), a connecting piece arranged between the rotating tube (3) and the flow chamber (101), and a transmission assembly arranged at an end of the rotating tube (3) away from the noise reduction box (1), wherein a slot is opened on the surface of the partition (102).

3. A ventilated high sound insulation silencing device according to claim 2, characterized in that: The connecting member comprises a rotating sleeve (4) rotatably arranged on a rod wall of a rotating tube (3) located inside the noise reduction box (1), and a connecting tube (401) arranged between the rotating sleeve (4) and the flow chamber (101); a connecting groove (402) is arranged inside the rotating sleeve (4); and an air inlet hole (302) is opened on the tube wall of the rotating tube (3) located inside the connecting groove (402).

4. A ventilated high sound insulation silencing device according to claim 1, characterized in that: A filter assembly is also provided at the bottom of the noise reduction box (1), the filter assembly comprising a filter box (10) arranged at the bottom of the air inlet frame (2), a mounting frame (11) arranged at the bottom of the filter box (10), a motor (12) arranged on the outer wall of the filter box (10), a rotating rod (1201) arranged on the output shaft of the motor (12), and a filter plate (1202) arranged on the rod wall of the rotating rod (1201), and the rotating rod (1201) is connected to the transmission assembly.

5. A ventilated high sound insulation silencing device according to claim 4, characterized in that: The inner side wall of the filter box (10) is rotatably connected to a second rotating shaft (13), a brush plate (1301) sleeved on the rod wall of the second rotating shaft (13), and a spring (1302) sleeved on the rod wall of the second rotating shaft (13).

6. A ventilated high sound insulation silencing device according to claim 4, characterized in that: The transmission assembly comprises a transmission rod (15) rotatably arranged on the side wall of the noise reduction box (1), a belt (14) arranged between the rotating tube (3), the transmission rod (15) and the rotating rod (1201), a driving bevel gear (1501) arranged on one end of the transmission rod (15) located inside the noise reduction box (1), and a driven bevel gear (801) arranged on the rod wall of the rotating rod (8) and meshing with the driving bevel gear (1501).

7. A ventilated high sound insulation silencing device according to claim 6, characterized in that: The side wall of the noise reduction box (1) is also provided with an exhaust pipe (16) connected thereto, the inner side wall of the exhaust pipe (16) is provided with a bent plate (17), and the surface of the bent plate (17) is provided with an exhaust port (1701).

8. A ventilated high sound insulation silencing device according to claim 7, characterized in that: The end of the rotating tube (3) away from the belt (14) is provided with a rotating column (18) extending into the interior of the exhaust cylinder (16); a sealing plate (1801) is provided on a rod wall of the rotating column (18) located inside the exhaust cylinder (16).

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