A micro-perforated double-layer orthogonal corrugated sandwich structure with improved sound insulation and absorption performance

Abstract

The present invention discloses a micro-perforated double-layer orthogonal corrugated sandwich structure for improving sound insulation and absorption performance. The upper corrugated plate and the lower corrugated plate are arranged in layers, and the corrugated grooves on the two corrugated plates are perpendicular to each other. The moisture-proof plate and the heat-insulating plate are arranged in layers between the upper corrugated plate and the lower corrugated plate. Sound-absorbing blocks adapted to the corrugations are provided in the corrugated grooves on the upper and lower sides of each corrugated plate. Several sound-absorbing boxes are placed in the corrugated grooves on the upper end surface of the upper corrugated plate together with the corresponding sound-absorbing blocks. The orifice plate is placed horizontally above the sound-absorbing box, and several through holes are provided on the upper corrugated plate. The present invention realizes the staggering of the overall assembly structure by staggering the two corrugated plates, and at the same time adds a sound-absorbing box to have better mechanical properties and sound-absorbing effects. The corresponding sound-absorbing blocks and the sound-absorbing boxes are embedded in the corrugated grooves, and the water-absorbing core is embedded in the sound-absorbing blocks. The structure is more compact, and while ensuring the overall lightness of the board, it has better sound insulation, fireproofing, moisture-proofing, heat preservation and damage resistance.

Description

Technical Field

[0001] The invention relates to a micro-perforated double-layer orthogonal corrugated sandwich structure with improved sound insulation and absorption performance. Background Art

[0002] With the acceleration of urbanization and the booming construction industry, people have higher and higher requirements for the acoustic performance of building interior environments. In public places such as concert halls, theaters, conference rooms, etc., as well as private spaces such as family rooms and offices, effective sound-absorbing materials are needed to control noise and improve sound quality.

[0003] Since the low-density "sandwich" was used in composite materials in recent years, sandwich materials and structures have played an important role in many fields with their excellent performance. Sandwich structures usually consist of three parts: upper and lower panels and core layers. They have the advantages of high specific strength, high specific modulus, and light weight. The core material can reduce the cost per unit volume, reduce noise and vibration, increase heat resistance, fatigue resistance and fire resistance, and can also strengthen the overall strength. As a highly efficient sound-absorbing material, the research and application of lightweight sandwich sound-absorbing panels are of great significance to improving the acoustic environment.

[0004] In recent years, researchers have conducted a lot of research work on lightweight sandwich sound-absorbing panels, but most of them are single-layer sandwich structures. The sound absorption effect of single-layer sandwich sound-absorbing panels is limited and the performance is not comprehensive enough. Therefore, it is urgent to develop a double-layer sandwich sound-absorbing structure with high sound absorption effect, fire resistance, moisture resistance and thermal insulation performance. Summary of the invention

[0005] The present invention aims to solve the problems existing in the prior art and provide a micro-perforated double-layer orthogonal corrugated sandwich structure with improved sound insulation and absorption performance.

[0006] The technical solutions adopted in the present invention are:

[0007] A micro-perforated double-layer orthogonal corrugated sandwich structure with improved sound insulation and absorption performance comprises a shell and a perforated plate arranged in the shell, a sound-absorbing box, a sound-absorbing block, an upper corrugated plate, a moisture-proof plate, a heat-insulating plate and a lower corrugated plate, wherein the upper corrugated plate and the lower corrugated plate are arranged in layers up and down, and the corrugated grooves on the two corrugated plates are perpendicular to each other, the moisture-proof plate and the heat-insulating plate are arranged in layers up and down between the upper corrugated plate and the lower corrugated plate, sound-absorbing blocks adapted to the corrugations are arranged in the corrugated grooves on the upper and lower surfaces of each corrugated plate, a plurality of sound-absorbing boxes are placed in the corrugated grooves on the middle and upper end surface of the upper corrugated plate together with the corresponding sound-absorbing blocks, the perforated plate is placed horizontally above the sound-absorbing box, and a plurality of through holes are arranged on the upper corrugated plate.

[0008] Furthermore, a water-absorbing core strip is inserted into the sound-absorbing block located in the corrugated grooves on the lower end surfaces of the two corrugated plates.

[0009] Furthermore, the water-absorbing core strip is made of silica gel water-absorbing material.

[0010] Furthermore, the sound-absorbing box is made of aluminum alloy, and is provided with a plurality of main sound-absorbing holes and side sound-absorbing holes which are interconnected. The main sound-absorbing holes and the side sound-absorbing holes all run through the sound-absorbing box, and all the main sound-absorbing holes are arranged in parallel with each other, and all the side sound-absorbing holes are arranged in parallel with each other, and the main sound-absorbing holes and the side sound-absorbing holes are perpendicular to each other.

[0011] Furthermore, the openings on both sides of the main silencer hole protrude out of the silencer box and face the orifice plate and the upper corrugated plate respectively, and a plurality of annular partitions are layered in each main silencer hole.

[0012] Furthermore, two sound absorbing blocks are arranged in each corrugated groove on the upper end surface of the upper corrugated plate, and each side sound absorbing hole on the sound absorbing box in the corresponding corrugated groove faces the sound absorbing blocks on both sides.

[0013] Furthermore, a plurality of channels are provided in the muffler box, the axis of the channels is perpendicular to the axis of the main muffler hole, the channels include blind holes and through holes, and the main muffler hole and the side muffler hole are connected to each other through the corresponding through holes.

[0014] Furthermore, the thickness of the side of the shell is less than 1 mm, and the outer wall of the shell is coated with a fire-resistant coating.

[0015] Furthermore, the sound absorbing blocks located above the upper corrugated plate and the lower corrugated plate are made of polyester foam, and the sound absorbing blocks located below the upper corrugated plate and the lower corrugated plate are made of composite foam composed of polyurethane, polyethylene and polyvinyl chloride.

[0016] Furthermore, the material of the moisture-proof board is polystyrene, and the material of the heat-insulating board is polyurethane.

[0017] The present invention has the following beneficial effects:

[0018] The present invention achieves the staggering of the overall assembly structure by staggering two corrugated plates, and at the same time, a sound-absorbing box is added. A plurality of layered annular partitions are arranged in each main sound-absorbing hole of the sound-absorbing box to reduce the gas flow rate. Rectangular channels (i.e., side sound-absorbing holes) that penetrate the sound-absorbing box are arranged on both sides of the main sound-absorbing hole and are connected to the external attraction block. A part of the channels (i.e., blind holes) are not connected to the rectangular channels (function: to retain the residence time of part of the airflow in the box). These structures can reduce the flow rate of the airflow and change the flow direction of the airflow, thereby reducing noise, so that it has better mechanical properties and sound-absorbing effects. The corresponding sound-absorbing blocks and sound-absorbing boxes are embedded in the corrugated grooves, and the water-absorbing core is embedded in the sound-absorbing blocks. The structure is more compact, and while ensuring the overall lightness of the plate, it has better sound insulation, fire prevention, moisture resistance, heat preservation and damage resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is an exploded view of the present invention.

[0020] Figure 2 This is a structural diagram of the present invention.

[0021] Figure 3 This is the structural diagram of the lower corrugated plate.

[0022] Figure 4 This is a structural diagram of the silencer box.

[0023] Figure 5 and Figure 6 This is a diagram of the internal structure of the silencer box. DETAILED DESCRIPTION

[0024] The present invention will be further described below in conjunction with the accompanying drawings.

[0025] like Figures 1 to 3 The present invention discloses a micro-perforated double-layer orthogonal corrugated sandwich structure for improving sound insulation and absorption performance, comprising a rectangular shell 1, wherein the thickness of the side of the shell 1 is less than 1 mm, and the outer wall of the shell 1 is coated with a fireproof coating. A perforated plate 2, a muffler box 3, a sound absorbing block 4, an upper corrugated plate 5, a moisture-proof plate 6, a heat-insulating plate 7 and a lower corrugated plate 8 are arranged in the shell 1. The upper corrugated plate 5 and the lower corrugated plate 8 are layered and arranged horizontally, and the corrugated grooves on the two corrugated plates are perpendicular to each other. The moisture-proof plate 6 and the heat-insulating plate 7 are layered and arranged between the upper corrugated plate 5 and the lower corrugated plate 8. Sound absorbing blocks 4 matching the corrugations are arranged in the corrugated grooves on the upper and lower surfaces of each corrugated plate. A plurality of mufflers 3 are placed in the corrugated grooves on the upper end surface of the upper corrugated plate 5 together with the corresponding sound absorbing blocks 4. The perforated plate 2 is horizontally placed above the muffler box 3, and a plurality of through holes are arranged on the upper corrugated plate 5.

[0026] like Figures 4 to 6 The sound-absorbing box 3 is made of aluminum alloy, and is provided with a plurality of main sound-absorbing holes 31 and side sound-absorbing holes 32 which are interconnected. The main sound-absorbing holes 31 and the side sound-absorbing holes 32 all run through the sound-absorbing box 3, and all the main sound-absorbing holes 31 are arranged in parallel with each other, and all the side sound-absorbing holes 32 are arranged in parallel with each other, and the main sound-absorbing holes 31 and the side sound-absorbing holes 32 are perpendicular to each other.

[0027] The two side openings of the main muffler hole 31 protrude outside the muffler box 3 (protruding height 5mm), which is convenient for direct embedding into the orifice plate 2. The two side openings of the main muffler hole 31 face the orifice plate 2 and the upper corrugated plate 5 respectively. A plurality of annular partitions 34 are layered in each main muffler hole 31 to reduce the gas flow rate. A plurality of channels 33 are provided in the muffler box 3. The axis of the channel 33 is perpendicular to the axis of the main muffler hole 31. The channel 33 includes a blind hole and a through hole. The main muffler hole 31 and the side muffler hole 32 are connected to each other through the corresponding through holes.

[0028] Rectangular channels (i.e. side silencer holes) are arranged on both sides of the main silencer hole, which penetrate the silencer box and are connected to the external attraction block. Some channels (i.e. blind holes) are not connected to the rectangular channels (function: to retain part of the airflow to stay in the box). These structures can reduce the velocity of the airflow and change the direction of the airflow, thereby reducing noise and giving it better mechanical properties and silencer effects.

[0029] Two sound-absorbing blocks 4 are provided in each corrugated groove on the upper end surface of the upper corrugated plate 5, and the side sound-absorbing holes 32 on the sound-absorbing boxes 3 in each corresponding corrugated groove face the sound-absorbing blocks 4 on both sides, which significantly improves the sound-absorbing effect of the plate.

[0030] The sound-absorbing block 4 located above the upper corrugated plate 5 and the lower corrugated plate 8 is made of polyester foam, which has a good absorption effect on high-frequency noise. The sound-absorbing block 4 located below the upper corrugated plate 5 and the lower corrugated plate 8 is made of a composite foam composed of polyurethane, polyethylene and polyvinyl chloride, which has a good absorption effect on medium and low-frequency noise, and the water-absorbing core strip 9 is embedded inside, which can reduce the influence of moisture on the sound-absorbing performance of the foam. The combination of the two foams makes the sound-absorbing effect of the board more comprehensive and has more application occasions. The water-absorbing core strip 9 is made of silica gel water-absorbing material, the moisture-proof plate 6 is made of polystyrene, and the insulation plate 7 is made of polyurethane.

[0031] The present invention achieves the staggering of the overall assembly structure by staggering two corrugated plates, and at the same time adds a sound-absorbing box to have better mechanical properties and sound-absorbing effects. The corresponding sound-absorbing blocks and sound-absorbing boxes are embedded in the corrugated grooves, and the water-absorbing core is embedded in the sound-absorbing blocks. The structure is more compact, and while ensuring the overall lightness of the plate, it has better sound insulation, fire prevention, moisture resistance, heat preservation and damage resistance.

[0032] The above description is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements without departing from the principle of the present invention, and these improvements should also be regarded as within the protection scope of the present invention.

Claims

1. A micro-perforated double-layer orthogonal corrugated sandwich structure with improved sound insulation and absorption performance, characterized in that: The invention comprises a shell (1) and a perforated plate (2) arranged in the shell (1), a sound-absorbing box (3), a sound-absorbing block (4), an upper corrugated plate (5), a moisture-proof plate (6), a heat-insulating plate (7) and a lower corrugated plate (8), wherein the upper corrugated plate (5) and the lower corrugated plate (8) are arranged in layers up and down, and the corrugated grooves on the two corrugated plates are perpendicular to each other, the moisture-proof plate (6) and the heat-insulating plate (7) are arranged in layers up and down between the upper corrugated plate (5) and the lower corrugated plate (8), and sound-absorbing blocks (4) matching the corrugations are arranged in the corrugated grooves on the upper and lower surfaces of each corrugated plate, a plurality of sound-absorbing boxes (3) are arranged together with the corresponding sound-absorbing blocks (4) in the corrugated grooves on the middle and upper end surface of the upper corrugated plate (5), the perforated plate (2) is arranged horizontally above the sound-absorbing box (3), and a plurality of through holes are arranged on the upper corrugated plate (5); The muffler box (3) is made of aluminum alloy, and is provided with a plurality of main muffler holes (31) and side muffler holes (32) that are interconnected. The main muffler holes (31) and the side muffler holes (32) all penetrate the muffler box (3), and all the main muffler holes (31) are arranged in parallel with each other, and all the side muffler holes (32) are arranged in parallel with each other, and the main muffler holes (31) and the side muffler holes (32) are perpendicular to each other. The openings on both sides of the main muffler hole (31) protrude outside the muffler box (3) and face the orifice plate (2) and the upper corrugated plate (5) respectively. A plurality of annular partitions (34) are layered in each main muffler hole (31); Two sound absorbing blocks (4) are arranged in each corrugated groove on the upper end surface of the upper corrugated plate (5), and each corresponding side sound absorbing hole (32) on the sound absorbing box (3) in the corrugated groove faces the sound absorbing blocks (4) on both sides; The muffler box (3) is provided with a plurality of channels (33), the axis of the channels (33) being perpendicular to the axis of the main muffler hole (31), the channels (33) comprising blind holes and through holes, and the main muffler hole (31) and the side muffler holes (32) being connected to each other via corresponding through holes.

2. The micro-perforated double-layer orthogonal corrugated sandwich structure with improved sound insulation and absorption performance as claimed in claim 1, characterized in that: A water-absorbing core strip (9) is inserted into the sound-absorbing block (4) located in the corrugated grooves on the lower end surfaces of the two corrugated plates.

3. The micro-perforated double-layer orthogonal corrugated sandwich structure with improved sound insulation and absorption performance as claimed in claim 2, characterized in that: The water-absorbing core strip (9) is made of silica gel water-absorbing material.

4. The micro-perforated double-layer orthogonal corrugated sandwich structure with improved sound insulation and absorption performance as claimed in claim 1, characterized in that: The shell (1) has a side thickness of less than 1 mm, and the outer wall surface of the shell (1) is coated with a fireproof coating.

5. The micro-perforated double-layer orthogonal corrugated sandwich structure with improved sound insulation and absorption performance as claimed in claim 1, characterized in that: The material of the sound absorbing block (4) located above the upper corrugated plate (5) and the lower corrugated plate (8) is polyester foam, and the material of the sound absorbing block (4) located below the upper corrugated plate (5) and the lower corrugated plate (8) is composite foam composed of polyurethane, polyethylene and polyvinyl chloride.

6. The micro-perforated double-layer orthogonal corrugated sandwich structure with improved sound insulation and absorption performance as claimed in claim 1, characterized in that: The material of the moisture-proof board (6) is polystyrene, and the material of the heat-insulating board (7) is polyurethane.

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