Micro-perforated plate silencer

Abstract

The invention provides a micro-perforated plate silencer, and relates to the field of silencing. The noise reduction device comprises a plurality of partition plates stacked in sequence, folded edges are fixedly arranged on the partition plates, the folded edges on the adjacent partition plates are fixedly connected through fixing bolts, sound absorption cavities are formed in the partition plates, noise reduction holes are formed in the inner walls of the sound absorption cavities in a penetrating mode, and first sound absorption cotton is arranged in the sound absorption cavities. The silencer has a better silencing effect.

Description

Technical Field

[0001] The present application relates to the field of sound insulation, and in particular to a micro-perforated plate silencer. Background Art

[0002] The micro-perforated plate silencer is a silencer made of a micro-perforated plate sound-absorbing structure. The silencer does not use any porous sound-absorbing material, but drills many microholes on a thin metal plate with a thickness of less than 1 mm. The aperture of these microholes is generally around 0.5~1mm, and the perforation rate is between 1%~3%.

[0003] The micro-perforated plate silencer not only has the characteristics of an impedance composite silencer, which can eliminate airflow noise in a wider frequency band, but also has the properties of high temperature resistance, oil resistance, and corrosion resistance.

[0004] However, the traditional micro-perforated plate silencer only achieves the effect of silencer by opening micro-holes; although it has a certain degree of silencer effect, once a large volume and long-term air supply is carried out, the silencer effect will be greatly reduced, which is easy to disrupt the lives of residents. Summary of the invention

[0005] In order to improve the problems existing in the above-mentioned technology, the present application provides a micro-perforated plate silencer.

[0006] The present application provides a micro-perforated plate silencer, which adopts the following technical solution: A micro-perforated plate silencer comprises: a plurality of partitions stacked in sequence, wherein the partitions are fixedly provided with folded edges, and the folded edges on adjacent partitions are fixedly connected by fixing bolts, a sound absorption cavity is opened on the partition, and a sound-absorbing hole is opened through the inner wall of the sound absorption cavity, and a first sound-absorbing cotton is arranged in the sound absorption cavity.

[0007] By adopting the above technical solution, during ventilation, the silencer holes can reduce the noise to a certain extent; at the same time, the sound-absorbing cavity can also absorb the noise, thereby further reducing the echo and noise of the sound to provide a quieter environment; after the noise is absorbed into the sound-absorbing cavity, the first sound-absorbing cotton can assist the sound-absorbing cavity in absorbing the noise, thereby further reducing the noise.

[0008] Optionally, an inclined cutting guide surface is provided at one end of the partition.

[0009] By adopting the above technical solution, the cutting guide surface can cut the wind body and guide it between adjacent partitions, so that the wind body is not likely to generate loud noise due to strong collision with the partition, thereby achieving the effect of reducing noise.

[0010] Optionally, a slow flow component is arranged between adjacent partitions, and the slow flow component includes: two receiving parts and two slow flow parts, the two receiving parts and the two slow flow parts correspond one to one and correspond one to one to two adjacent partitions, the receiving parts are arranged on the corresponding partitions, and a fixing component is arranged between the two receiving parts, and the slow flow part is arranged on the corresponding receiving parts.

[0011] By adopting the above technical solution, the slow flow component can reduce the speed of the wind body, thereby reducing the noise generated between the wind body and the partition.

[0012] Optionally, the receiving part includes: a receiving rod and a receiving plate, the receiving rod is arranged on the corresponding partition plate, the receiving plate is fixedly mounted on the receiving rod, and the slow flow part is arranged between the corresponding receiving plate and the receiving rod, and the fixing component is arranged between the two receiving rods.

[0013] By adopting the above technical solution, the receiving rod and the receiving plate are used to cooperate with each other to receive the slow flow part, thereby facilitating the reduction of the flow velocity of the wind body.

[0014] Optionally, the fixing assembly includes: a fixing rod, a rotating ring, a limit block and a bidirectional screw, the rotating ring is rotatably installed between the two receiving rods, the receiving rod is provided with a receiving hole, and the inner wall of the receiving hole is provided with a limit groove, the partition is provided with a fixing hole, one end of the fixing rod is arranged in the receiving hole, and the other end is arranged in the fixing hole, the fixing rod is provided with a threaded hole, the limit block is slidably arranged in the limit groove and fixed to the fixing rod, the bidirectional screw is fixedly passed through the rotating ring, and one end of the bidirectional screw is threadedly connected to one of the threaded holes, and the other end is threadedly connected to the other threaded hole.

[0015] By adopting the above technical solution, during installation, align the fixing rod with the fixing hole; then, rotate the rotating ring to drive the screw rod to rotate, so that the fixing rod continuously extends out of the accommodating hole and is inserted into the fixing hole, thereby completing the fixation of the receiving rod.

[0016] Optionally, the slow-flow part includes: a slow-flow plate and a slow-flow spring, the slow-flow plate is slidably mounted on the corresponding receiving rod, and the slow-flow spring is mounted on the corresponding receiving rod and fixed between the corresponding receiving plate and the slow-flow plate.

[0017] By adopting the above technical solution, when the wind body is directed between adjacent partitions, the wind body will hit the slow-flow plate; at this time, the slow-flow spring is compressed to reduce the impact force, which can not only reduce the generation of noise, but also slow down the flow speed of the wind body to further reduce the generation of noise.

[0018] Optionally, the slow flow part further includes: a second sound absorbing cotton, a sound reduction hole is opened through the slow flow plate, and the second sound absorbing cotton is fixed between two adjacent slow flow plates.

[0019] By adopting the above technical solution, the second sound-absorbing cotton can absorb noise on the one hand, and can also cushion the impact on the slow flow plate on the other hand.

[0020] Optionally, the fixing assembly further includes: a rubber sleeve, an end of the fixing rod away from the bidirectional screw rod is configured as a bullet head, and the rubber sleeve fixing sleeve is mounted on the fixing rod.

[0021] By adopting the above technical solution, when the fixing rod passes through the fixing hole, the bullet head can facilitate the passing of the rubber sleeve; then, during ventilation, if the receiving rod is subjected to fluctuations, the rubber sleeve can be squeezed, thereby achieving a buffering effect, so that it is not easy to generate noise between the fixing rod and the partition.

[0022] Optionally, the slow flow part also includes: an extension rod, a first slow flow plate and a second slow flow plate, the extension rod is fixed between the two slow flow plates, the first slow flow plate is fixed on the partition, and the second slow flow plate is fixedly mounted on the extension rod.

[0023] By adopting the above technical solution, the wind body will collide with the first slow flow plate. At this time, the first slow flow plate will bend and deform to provide buffering, thereby achieving the effect of reducing the flow speed of the wind body; and the wind body will pass between the two first slow flow plates between adjacent partitions.

[0024] Optionally, one end of the sound absorbing cavity away from the cut guide surface passes through the partition, and a cover plate is provided on the partition, connecting bolts are fixedly provided between the cover plate and the partition, and the first sound absorbing cotton is fixedly connected to the cover plate.

[0025] By adopting the above technical solution, after a long period of sound silencing, the connecting bolts can be unscrewed and the cover plate can be taken out of the cover groove; at the same time, the first sound-absorbing cotton will be drawn out from the sound-absorbing cavity, so that the first sound-absorbing cotton can be replaced to ensure the sound silencing quality.

[0026] In summary, the present application includes at least one of the following beneficial effects: 1. During ventilation, the silencer holes can reduce the noise to a certain extent; at the same time, the sound-absorbing cavity can also absorb the noise, thereby further reducing the echo and noise of the sound to provide a quieter environment; after the noise is absorbed into the sound-absorbing cavity, the first sound-absorbing cotton can assist the sound-absorbing cavity in absorbing the noise, thereby further reducing the noise.

[0027] 2. The cutting guide surface can cut the wind body and guide it to between adjacent partitions, so that the wind body is not easy to generate loud noise due to strong collision with the partition, so as to achieve the effect of reducing noise.

[0028] 3. After a long period of silencing, the connecting bolts can be unscrewed and the cover can be removed from the partition; at the same time, the first sound-absorbing cotton will be pulled out of the sound-absorbing cavity, so that the first sound-absorbing cotton can be replaced to ensure the quality of silencing. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic structural diagram according to an embodiment of the present application; Figure 2 yes Figure 1 A schematic top view of Figure 3 is along Figure 2 A schematic cross-sectional view taken along the cutting line AA in FIG. Figure 4 yes Figure 3 Schematic partial enlarged view of part B.

[0030] In the figure: 1. partition; 11. silencer hole; 12. sound-absorbing chamber; 13. first sound-absorbing cotton; 15. cover plate; 16. connecting bolt; 17. folded edge; 18. fixing bolt; 19. fixing hole; 10. cutting guide surface; 2. receiving part; 21. receiving rod; 211. accommodating hole; 212. limiting groove; 22. receiving plate; 3. slow-flow part; 31. slow-flow plate; 311. sound-reducing hole; 32. slow-flow spring; 33. second sound-absorbing cotton; 34. extension rod; 35. first slow-flow sheet; 36. second slow-flow sheet; 4. fixing assembly; 41. fixing rod; 411. threaded hole; 42. rotating ring; 43. limiting block; 44. two-way screw; 45. rubber sleeve. DETAILED DESCRIPTION

[0031] The present application provides a micro-perforated plate silencer.

[0032] See also Figure 1 A micro-perforated plate silencer comprises: a plurality of partitions 1 stacked in sequence, four of which are provided in this embodiment, and ventilation channels are left between adjacent partitions 1. Folding edges 17 are welded at both ends of the partition 1 along the length direction, and the folding edges 17 are "L" shaped; and two corresponding folding edges 17 on adjacent partitions 1 are fixedly connected by fixing bolts 18. If the partition 1 needs to be removed, the fixing bolts 18 are directly screwed down to remove the partition 1; and the partitions 1 can be stacked in sequence according to the required number of partitions 1.

[0033] See also Figure 2 and Figure 3A sound absorbing cavity 12 is provided on the partition 1, and a plurality of silencer holes 11 are provided through the inner top wall and the inner bottom wall of the sound absorbing cavity 12. During ventilation, the silencer holes 11 can reduce the noise to a certain extent; at the same time, the sound absorbing cavity 12 can also absorb the noise, thereby further reducing the echo and noise of the sound, so as to provide a quieter environment.

[0034] See also Figure 3 A first sound-absorbing cotton 13 is arranged in the sound-absorbing cavity 12. After the noise is absorbed into the sound-absorbing cavity 12, the first sound-absorbing cotton 13 can assist the sound-absorbing cavity 12 in absorbing the noise, thereby further reducing the noise.

[0035] See also Figure 3 Furthermore, an inclined cutting guide surface 10 is provided at one end of the partition 1 in the width direction. During ventilation, the cutting guide surface 10 can cut the wind body and guide it to between adjacent partitions 1, so that the wind body is not easy to generate loud noise due to strong collision with the partition 1, so as to achieve the effect of reducing noise.

[0036] See also Figure 3 Furthermore, one end of the sound absorbing cavity 12 away from the cutting guide surface 10 passes through the partition 1, and the partition 1 is fixedly connected with a cover plate 15 by a connecting bolt 16, and the cover plate 15 is used to close the sound absorbing cavity 12. The first sound absorbing cotton 13 is bonded to the cover plate 15. After long-term silencing, the connecting bolt 16 can be unscrewed and the cover plate 15 can be removed from the partition 1; at the same time, the first sound absorbing cotton 13 will be drawn out of the sound absorbing cavity 12, so that the first sound absorbing cotton 13 can be replaced to ensure the silencing quality.

[0037] See also Figure 3 Furthermore, a slow-flow component is provided between adjacent partitions 1 , and the slow-flow component can reduce the speed of the wind body, thereby reducing the noise generated between the wind body and the partition 1 .

[0038] See also Figure 3 The slow-flow component includes: two receiving parts 2 and two slow-flow parts 3, the two receiving parts 2 and the two slow-flow parts 3 correspond to each other one by one, and one of the receiving parts 2 and one of the slow-flow parts 3 corresponds to one of the adjacent partitions 1, and the other receiving part 2 and the other slow-flow part 3 correspond to the other of the adjacent partitions 1, and the subsequent descriptions are all corresponding relationships.

[0039] See also Figure 3 and Figure 4 The receiving part 2 includes: a receiving rod 21 and a receiving plate 22, the receiving rod 21 is arranged on the partition 1; the receiving plate 22 is fixedly sleeved on the receiving rod 21, and the receiving rod 21 and the receiving plate 22 cooperate to receive the slow flow part 3, so as to reduce the flow speed of the wind body.

[0040] See also Figure 3 and Figure 4 Furthermore, a fixing assembly 4 is provided between the two receiving rods 21 between two adjacent partitions 1, and the fixing assembly 4 is used for quickly fixing and connecting the receiving rod 21 to the partition 1, and quickly disassembling the receiving rod 21 and the partition 1.

[0041] See also Figure 3 and Figure 4 The fixing assembly 4 includes: a fixing rod 41, a rotating ring 42, a stopper 43 and a bidirectional screw rod 44. In this embodiment, two fixing rods 41 are provided, and they correspond one to one with the two receiving rods 21 between the two adjacent partitions 1. A single fixing rod 41 corresponds to two stopper blocks 43. The rotating ring 42 is rotatably installed between the two receiving rods 21 between the two adjacent partitions 1. On the one hand, it is convenient to fix the two receiving rods 21 at the same time; on the other hand, it connects the two receiving rods 21 to improve the connection strength.

[0042] See also Figure 3 and Figure 4 The end wall of the receiving rod 21 is penetrated with a receiving hole 211, and the inner wall of the receiving hole 211 is provided with a limiting groove 212 along the axial direction, and the inner bottom wall and the inner top wall of the partition 1 are penetrated with a fixing hole 19; one end of the fixing rod 41 is set in the receiving hole 211, and the other end is penetrated with the fixing hole 19, and the fixing rod 41 is used to fix and limit the receiving rod 21. The limiting block 43 is slidably set in the limiting groove 212, and the limiting block 43 is fixedly connected to the fixing rod 41, and the limiting rod can make the fixing rod 41 only slide, but not rotate.

[0043] See also Figure 3 and Figure 4 A threaded hole 411 is provided at one end of the fixing rod 41 away from the partition 1; a bidirectional screw rod 44 passes through a rotating ring 42 and is fixedly connected to the rotating ring 42, one end of the bidirectional screw rod 44 extends into the accommodating hole 211 on one of the receiving rods 21 and is threadedly connected to the threaded hole 411, and the other end extends into the accommodating hole 211 on the other receiving rod 21 and is threadedly connected to the threaded hole 411. When installing, align the fixing rod 41 with the fixing hole 19; then, rotate the rotating ring 42 to drive the screw rod to rotate, so that the fixing rod 41 continuously extends out of the accommodating hole 211 and is inserted into the fixing hole 19, thereby completing the fixation of the receiving rod 21; when disassembling, just rotate the rotating ring 42 in the opposite direction.

[0044] See also Figure 3 and Figure 4The fixing assembly 4 further includes: a rubber sleeve 45, and one end of the fixing rod 41 away from the bidirectional screw rod 44 is set as a bullet head. The rubber sleeve 45 is fixedly sleeved on the fixing rod 41, and the rubber sleeve 45 abuts against the inner wall of the fixing hole 19. When the fixing rod 41 is inserted into the fixing hole 19, the bullet head can facilitate the insertion of the rubber sleeve 45; then, during ventilation, if the receiving rod 21 is subjected to fluctuations, the rubber sleeve 45 can be squeezed, thereby achieving a buffering effect, so that it is not easy to generate noise between the fixing rod 41 and the partition 1.

[0045] See also Figure 3 and Figure 4 The slow flow part 3 includes: a slow flow plate 31 and a slow flow spring 32. The slow flow plate 31 is slidably mounted on the receiving rod 21 and slides along the axial direction of the receiving rod 21. The slow flow spring 32 is used to be fixed between the receiving plate 22 and the slow flow plate 31. The slow flow spring 32 can reset the slow flow plate 31. When the wind body is guided between the adjacent partitions 1, the wind body will hit the slow flow plate 31; at this time, the slow flow spring 32 is compressed to reduce the impact force, which can not only reduce the generation of noise, but also slow down the flow speed of the wind body to further reduce the generation of noise.

[0046] See also Figure 3 and Figure 4 Furthermore, the slow flow part 3 also includes: a second sound absorbing cotton 33. A plurality of sound reducing holes 311 are formed through the top wall of the slow flow plate 31. When the wind flows through the slow flow plate 31 and the partition 1, the sound reducing holes 311 can absorb the noise. The second sound absorbing cotton 33 is fixed between two slow flow plates 31. The second sound absorbing cotton 33 can absorb the noise on one hand and buffer the impact on the slow flow plate 31 on the other hand.

[0047] See also Figure 3 and Figure 4 Furthermore, the slow flow part 3 also includes: an extension rod 34, a first slow flow sheet 35 and a second slow flow sheet 36. The first slow flow sheet 35 is fixed on the bottom wall and the top wall of the partition 1, and the first slow flow sheet 35 is located on the side of the slow flow sheet 31 away from the cutting guide surface 10. When the wind body flows through the channel between adjacent partitions 1, the wind body will collide with the first slow flow sheet 35. At this time, the first slow flow sheet 35 will bend and deform to buffer, thereby achieving the effect of reducing the flow speed of the wind body; and the wind body will pass between the two first slow flow sheets 35 between the adjacent partitions 1.

[0048] See also Figure 3 and Figure 4The extension rod 34 is fixed between the two slow flow plates 31, and the second slow flow sheet 36 is fixedly mounted on the extension rod 34. The second slow flow sheet 36 is located on the side of the first slow flow sheet 35 away from the slow flow plate 31. In the embodiment of the present application, the first slow flow sheet 35 and the second slow flow sheet 36 can both be made of rubber material. After the wind body flows through the first slow flow sheet 35, the wind body will hit the second slow flow sheet 36 again; at this time, the first slow flow sheet 35 will bend and deform for buffering, thereby further achieving the effect of reducing the flow velocity of the wind body.

[0049] A micro-perforated plate sound insulation The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A micro-perforated plate silencer, characterized in that: include: A plurality of partitions (1) are stacked in sequence, each partition (1) being fixedly provided with a folded edge (17), and the folded edges (17) on adjacent partitions (1) are fixedly connected by fixing bolts (18), a sound absorbing cavity (12) is provided on the partition (1), and a sound absorbing hole (11) is provided through the inner wall of the sound absorbing cavity (12), and a first sound absorbing cotton (13) is provided in the sound absorbing cavity (12).

2. The micro-perforated plate silencer according to claim 1, characterized in that: An inclined cutting guide surface (10) is provided at one end of the partition plate (1).

3. The micro-perforated plate silencer according to claim 1, characterized in that: A slow-flow component is provided between adjacent partitions (1), and the slow-flow component comprises: two receiving parts (2) and two slow-flow parts (3), the two receiving parts (2) and the two slow-flow parts (3) correspond one to one and correspond one to one to two adjacent partitions (1), the receiving parts (2) are provided on the corresponding partitions (1), and a fixing component (4) is provided between the two receiving parts (2), and the slow-flow part (3) is provided on the corresponding receiving parts (2).

4. The micro-perforated plate silencer according to claim 3, characterized in that: The receiving portion (2) comprises: a receiving rod (21) and a receiving plate (22); the receiving rod (21) is arranged on the corresponding partition plate (1); the receiving plate (22) is fixedly sleeved on the receiving rod (21); the slow flow portion (3) is arranged between the corresponding receiving plate (22) and the receiving rod (21); and the fixing component (4) is arranged between the two receiving rods (21).

5. The micro-perforated plate silencer according to claim 4, characterized in that: The fixing assembly (4) comprises: a fixing rod (41), a rotating ring (42), a limiting block (43) and a bidirectional screw rod (44); the rotating ring (42) is rotatably mounted between the two receiving rods (21); a receiving hole (211) is provided through the receiving rod (21); and a limiting groove (212) is provided on the inner wall of the receiving hole (211); a fixing hole (19) is provided through the partition (1); one end of the fixing rod (41) is arranged in the receiving hole ( The fixing rod (41) is provided with a threaded hole (411), the limiting block (43) is slidably arranged in the limiting groove (212) and fixed to the fixing rod (41), the bidirectional screw rod (44) is fixedly passed through the rotating ring (42), and one end of the bidirectional screw rod (44) is threadedly connected to one of the threaded holes (411) and the other end is threadedly connected to the other threaded hole (411).

6. The micro-perforated plate silencer according to claim 4, characterized in that: The slow-flow portion (3) comprises: a slow-flow plate (31) and a slow-flow spring (32); the slow-flow plate (31) is slidably mounted on the corresponding receiving rod (21); the slow-flow spring (32) is mounted on the corresponding receiving rod (21) and fixed between the corresponding receiving plate (22) and the slow-flow plate (31).

7. The micro-perforated plate silencer according to claim 6, characterized in that: The slow flow portion (3) further comprises: a second sound absorbing cotton (33); a sound reduction hole (311) is provided through the slow flow plate (31); and the second sound absorbing cotton (33) is fixed between two adjacent slow flow plates (31).

8. The micro-perforated plate silencer according to claim 5, characterized in that: The fixing assembly (4) further comprises a rubber sleeve (45), one end of the fixing rod (41) away from the bidirectional screw rod (44) is configured as a bullet head, and the rubber sleeve (45) is fixedly sleeved on the fixing rod (41).

9. The micro-perforated plate silencer according to claim 6, characterized in that: The slow flow section (3) further comprises: an extension rod (34), a first slow flow sheet (35) and a second slow flow sheet (36); the extension rod (34) is fixed between the two slow flow plates (31); the first slow flow sheet (35) is fixed on the partition (1); and the second slow flow sheet (36) is fixedly sleeved on the extension rod (34).

10. The micro-perforated plate silencer according to claim 1, characterized in that: One end of the sound absorbing cavity (12) away from the cutting guide surface (10) passes through the partition (1), and a cover plate (15) is provided on the partition (1), and connecting bolts (16) are fixedly provided between the cover plate (15) and the partition (1), and the first sound absorbing cotton (13) is fixedly connected to the cover plate (15).

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