A sound-absorbing unit panel and a fully enclosed sound barrier

Abstract

The present invention discloses a sound-absorbing unit board, comprising a perforated layer, a honeycomb interlayer, a damping layer and a metal layer, wherein the perforated layer, the honeycomb interlayer, the damping layer and the metal layer are sequentially stacked to form a composite board; the honeycomb interlayer comprises a plurality of honeycomb cores and a porous material layer, wherein the porous material layer is arranged around the circumference of the plurality of honeycomb cores; the perforated layer is provided with a plurality of through holes, wherein the through holes are arranged one by one with the honeycomb cores, and the central axis of the through hole passing through the center of the circle overlaps with the central axis of the honeycomb core. The present invention has the advantages of light weight, high strength, better sound absorption and noise reduction effect, etc.

Description

Technical Field

[0001] The present invention mainly relates to the technical field of sound insulation and absorption panels, and in particular to a sound absorption unit panel and a fully enclosed sound barrier. Background Art

[0002] The operation of high-speed trains will generate a lot of noise pollution to the surrounding environment. The sound barrier occupies a small area, is easy and quick to install, and has a low economic cost. It has become an important measure to control traffic noise pollution. However, the noise reduction effect of the semi-enclosed sound barrier structure is not ideal, especially in special environmental sensitive points such as ecological environment protection areas, schools, and hospitals. Ordinary sound barriers or semi-enclosed sound barriers are difficult to play a good protective role. The fully enclosed sound barrier can greatly reduce the noise when the train passes, and there is no bright sound area, which reduces the noise pollution to the outside. However, the current fully enclosed sound barrier has a large self-weight and low structural strength. It cannot effectively resist the impact of train wind and natural wind, and the sound insulation and absorption performance is not targeted. Summary of the invention

[0003] In view of the technical problems existing in the prior art, the present invention provides a sound-absorbing unit panel and a fully enclosed sound barrier which have light weight, high strength and better sound absorption and noise reduction effects.

[0004] In order to solve the above technical problems, the present invention provides a sound absorbing unit panel, which adopts the following technical solutions:

[0005] A sound-absorbing unit panel comprises a perforated layer, a honeycomb interlayer, a damping layer and a metal layer, wherein the perforated layer, the honeycomb interlayer, the damping layer and the metal layer are stacked in sequence to form a composite panel; the honeycomb interlayer comprises a plurality of honeycomb cores and a porous material layer, wherein the porous material layer is arranged around the circumference of the plurality of honeycomb cores; the perforated layer is provided with a plurality of through holes, wherein the through holes are arranged in one-to-one correspondence with the honeycomb cores, and the central axis of the through hole passing through the center of the circle overlaps with the central axis of the honeycomb core.

[0006] As a further improvement of the present invention: the perforated layer includes a perforated plate and a protective plate, and the protective plate is arranged around the periphery of the perforated plate.

[0007] As a further improvement of the present invention: the perforated plate is arranged above the multiple honeycomb cores, the area of ​​the perforated plate is greater than or equal to the area of ​​the multiple honeycomb cores, and the protective plate is arranged above the porous material layer.

[0008] As a further improvement of the present invention: the metal layer is a U-shaped structure.

[0009] The present invention also provides a fully enclosed sound barrier, which adopts the following technical solutions:

[0010] A fully enclosed sound barrier comprises the sound absorbing unit panels as described above, wherein there are at least two sound absorbing unit panels, and two adjacent sound absorbing unit panels are connected by a connecting assembly, wherein the connecting assembly comprises an I-beam, a movable baffle and at least two slots, wherein the movable baffle is arranged on an upper crossbeam of the I-beam, and the slots are symmetrically arranged on both sides of a longitudinal beam of the I-beam, wherein the sound absorbing unit panels are clamped in the slots, and wherein the I-beam, the movable baffle, the slots and the sound absorbing unit panels are fixed by fasteners.

[0011] As a further improvement of the present invention: a rubber fixing seat is provided between the movable baffle and the card slot.

[0012] As a further improvement of the present invention: a limiting rubber pad is further provided between the sound absorbing unit plate and the lower cross beam of the I-beam.

[0013] As a further improvement of the present invention: the sound absorbing unit panel includes a first sound absorbing unit panel, a second sound absorbing unit panel, a third sound absorbing unit panel, a fourth sound absorbing unit panel and a fifth sound absorbing unit panel, the first sound absorbing unit panel, the second sound absorbing unit panel, the third sound absorbing unit panel, the fourth sound absorbing unit panel and the fifth sound absorbing unit panel are sequentially connected to form an arch structure, the third sound absorbing unit panel is arranged at the top of the arch structure, the first sound absorbing unit panel and the fifth sound absorbing unit panel are symmetrically arranged at the bottom end of the arch structure, and the second sound absorbing unit panel and the fourth sound absorbing unit panel are symmetrically arranged in the middle of the arch structure.

[0014] As a further improvement of the present invention: the area ratio of the honeycomb core and the porous material layer of the third sound absorbing unit panel is 2:1.

[0015] As a further improvement of the present invention: the diameter of the through holes on the perforated layer of the third sound absorbing unit panel is 0.7 mm to 1 mm.

[0016] As a further improvement of the present invention: the side length of the honeycomb core of the third sound absorbing unit panel is 3 mm to 4 mm.

[0017] As a further improvement of the present invention: the second sound absorbing unit panel and the fourth sound absorbing unit panel have the same structure, and the area ratio of the honeycomb core and the porous material layer is 1:1.

[0018] As a further improvement of the present invention: the first sound absorbing unit panel and the fifth sound absorbing unit panel have the same structure, and the area ratio of the honeycomb core and the porous material layer is 3:1.

[0019] As a further improvement of the present invention: the diameter of the through holes on the perforated layers of the first sound absorbing unit panel and the fifth sound absorbing unit panel is 0.2 mm to 0.7 mm.

[0020] As a further improvement of the present invention: the side length of the honeycomb core of the first sound absorbing unit panel and the fifth sound absorbing unit panel is 4 mm to 10 mm.

[0021] Compared with the prior art, the advantages of the present invention are:

[0022] The sound absorbing unit panel and the fully enclosed sound barrier of the present invention are composed of a perforated layer, a honeycomb interlayer, a damping layer and a metal layer which are sequentially stacked to form a composite panel. The middle part of the honeycomb interlayer is a plurality of honeycomb cores, and the surrounding side is a porous material layer. The honeycomb interlayer structure improves the rigidity and strength of the overall structure of the sound absorbing unit panel and reduces the weight of the structure. Through holes are arranged on the perforated layer, the through holes correspond to the honeycomb cores one by one, and the central axis of the through holes passing through the center of the circle overlaps with the central axis of the honeycomb core to form a resonant sound absorber, broadening the sound absorption frequency band of the honeycomb interlayer. The damping layer at the bottom of the honeycomb interlayer can improve the sound insulation and vibration reduction performance of the interlayer structure. The composite structural design greatly improves the sound absorption and noise reduction capabilities of the sound barrier. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic structural diagram of the sound absorbing unit panel of the present invention.

[0024] Figure 2 It is a schematic structural diagram of the connection of two sound absorbing unit panels of the sound barrier of the present invention.

[0025] Figure 3 It is a schematic diagram of the layout of the sound barrier of the present invention in specific applications.

[0026] Legend:

[0027] 100, sound absorbing unit plate; 101, first sound absorbing unit plate; 102, second sound absorbing unit plate; 103, third sound absorbing unit plate; 104, fourth sound absorbing unit plate; 105, fifth sound absorbing unit plate; 1, perforated layer; 11, protective plate; 12, perforated plate; 2, honeycomb sandwich; 21, honeycomb core; 22, porous material layer; 3, damping layer; 4, metal layer; 5, I-beam; 6, movable baffle; 7, card slot; 8, rubber fixing seat; 9, limiting rubber pad. DETAILED DESCRIPTION

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] like Figure 1As shown, the present invention discloses a sound absorbing unit panel 100, comprising a perforated layer 1, a honeycomb interlayer 2, a damping layer 3 and a metal layer 4, wherein the perforated layer 1, the honeycomb interlayer 2, the damping layer 3 and the metal layer 4 are sequentially stacked to form a composite panel; the honeycomb interlayer 2 comprises a plurality of honeycomb cores 21 and a porous material layer 22, and the porous material layer 22 is arranged around the plurality of honeycomb cores 21; a plurality of through holes are opened on the perforated layer 1, and the through holes are arranged one by one with the honeycomb cores 21, and the central axis of the through hole passing through the center of the circle overlaps with the central axis of the honeycomb core 21.

[0030] The sound absorbing unit panel 100 of the present invention is composed of a perforated layer 1, a honeycomb interlayer 2, a damping layer 3 and a metal layer 4 which are stacked in sequence to form a composite panel. In this embodiment, the perforated layer 1, the honeycomb interlayer 2 and the damping layer 3 are fixed on the metal layer 4 by gluing. The middle part of the honeycomb interlayer 2 is a plurality of honeycomb cores 21, and the peripheral side is a porous material layer 22, which is fixed to the honeycomb core 2 by gluing. The honeycomb interlayer 2 structure improves the rigidity and strength of the overall structure of the sound absorbing unit panel 100 and reduces the weight of the structure. Through holes are provided on the perforated layer 1, and the through holes correspond to the honeycomb core 21 one by one. The central axis of the through holes passing through the center of the circle overlaps with the central axis of the honeycomb core 21 to form a resonant sound absorber, which broadens the sound absorption frequency band of the sound absorbing unit panel 100. The damping layer 3 at the bottom of the honeycomb interlayer 2 can improve the sound insulation and vibration reduction performance of the sandwich structure. Through the composite structural design, the sound absorption and noise reduction ability of the sound barrier is greatly improved.

[0031] In this embodiment, the perforated layer 1 includes a perforated plate 12 and a protective plate 11, the protective plate 11 is arranged around the perforated plate 12, the perforated plate 12 is arranged above the plurality of honeycomb cores 21, the area of ​​the perforated plate 12 is greater than or equal to the area of ​​the plurality of honeycomb cores 21, and the protective plate 11 is arranged above the porous material layer 22. The protective plate 11 is arranged around the perforated plate 12, and can play a role in fixing the perforated plate 12 and protecting the porous material layer 22.

[0032] In this embodiment, the metal layer 4 is a U-shaped structure, and the composite layer structure can be more reliably fixed by the U-shaped metal layer 4 .

[0033] like Figure 2 As shown, the present invention also provides a fully enclosed sound barrier, including the sound absorbing unit panel 100 as described above, there are at least two sound absorbing unit panels 100, and two adjacent sound absorbing unit panels 100 are connected by a connecting component, the connecting component includes an I-beam 5, a movable baffle 6 and at least two slots 7, the movable baffle 6 is arranged on the upper crossbeam of the I-beam 5, the slots 7 are symmetrically arranged on both sides of the longitudinal beam of the I-beam 5, the sound absorbing unit panel 100 is clamped in the slot 7, and the I-beam 5, the movable baffle 6, the slot 7 and the sound absorbing unit panel 100 are fixed by fasteners.

[0034] The multiple sound absorbing unit panels 100 can be reliably fixed by the movable baffle 6, the I-beam 5 and the slot 7, and the disassembly and assembly are convenient. Further, in the preferred embodiment, a rubber fixing seat 8 is provided between the movable baffle 6 and the slot 7, and a limiting rubber pad 9 is also provided between the sound absorbing unit panel 100 and the lower cross beam of the I-beam 5. Preferably, the limiting rubber pad 9 is provided with a certain curvature, which can effectively fix the sound absorbing unit panel 100. The sound absorbing unit panel 100 is indirectly in contact with the I-beam 5 through the rubber fixing seat 8, which is not only convenient for installation and disassembly, but also when the sound absorbing unit panel 100 is subjected to load and vibrates, the rubber fixing seat 8 and the limiting rubber pad 9 can effectively reduce the impact and vibration on the structure of the sound absorbing unit panel 100, and avoid the sound barrier from being damaged too quickly.

[0035] In this embodiment, the porous material layer 22 and the damping layer 3 are arranged with a margin, which can seal the gap between the two sound absorbing unit panels 100 when connected, and can better ensure the sealing of the sound barrier.

[0036] like Figure 3 As shown, in a preferred embodiment, the fully enclosed sound barrier includes a first sound absorbing unit panel 101, a second sound absorbing unit panel 102, a third sound absorbing unit panel 103, a fourth sound absorbing unit panel 104 and a fifth sound absorbing unit panel 105. The first sound absorbing unit panel 101, the second sound absorbing unit panel 102, the third sound absorbing unit panel 103, the fourth sound absorbing unit panel 104 and the fifth sound absorbing unit panel 105 are sequentially connected to form an arch structure, the third sound absorbing unit panel 103 is arranged at the top of the arch structure, the first sound absorbing unit panel 101 and the fifth sound absorbing unit panel 105 are symmetrically arranged at the bottom end of the arch structure, and the second sound absorbing unit panel 102 and the fourth sound absorbing unit panel 104 are symmetrically arranged in the middle of the arch structure.

[0037] In this embodiment, the top of the arch structure is mainly pantograph noise, mainly medium and low frequency noise. Since the honeycomb core 21 mainly isolates low frequency noise, and the porous material layer 22 mainly isolates medium and high frequency noise, according to the noise frequency ratio, the area ratio of the honeycomb core 21 and the porous material layer 22 of the third sound absorbing unit panel 103 is 2:1; the aperture size of the through hole on the perforated layer 1 of the third sound absorbing unit panel 103 is 0.7mm~1mm; the side length of the honeycomb core 21 of the third sound absorbing unit panel 103 is 3mm~4mm, and the area of ​​the honeycomb core 21 is larger, which can better isolate the low frequency noise from the pantograph.

[0038] The middle part of the arch structure is mainly the noise of the vehicle body, and its noise is mainly medium and high frequency noise. The second sound absorbing unit panel 102 and the fourth sound absorbing unit panel 104 have the same structural settings. According to the noise frequency ratio, the area ratio of the honeycomb core 21 and the porous material layer 22 is 1:1; the through hole size of the perforated layer 1 of the second sound absorbing unit panel 102 and the fourth sound absorbing unit panel 104 and the side length of the honeycomb core 21 are similar to those of the third sound absorbing unit panel 103, but in order to better isolate the medium and high frequency noise, the aperture of the through hole of the protective plate 11 above the porous material layer 22 of the second sound absorbing unit panel 102 and the fourth sound absorbing unit panel 104 is larger than that of the third sound absorbing unit panel 103, so as to increase the contact area between the porous material and the noise sound wave.

[0039] The bottom of the arch structure is mainly wheel-rail noise, mainly low-frequency noise. According to the noise frequency ratio, the first sound absorbing unit panel 101 and the fifth sound absorbing unit panel 105 have the same structure, and the area ratio of the honeycomb core 21 and the porous material layer 22 is 3:1. Since the low-frequency noise frequency at the bottom is lower than that at the top and the middle, the aperture of the perforated layer 1 is further reduced and the side length of the honeycomb core 21 is enlarged. The aperture size of the through hole on the perforated layer 1 of the first sound absorbing unit panel 101 and the fifth sound absorbing unit panel 105 is 0.2mm~0.7mm, and the side length of the honeycomb core 21 of the first sound absorbing unit panel 101 and the fifth sound absorbing unit panel 105 is 4mm~10mm.

[0040] In view of the frequency characteristics of train pantograph, car body, and wheel-rail noise, the present invention rationally arranges sound-absorbing unit panels 100 with different structures, adjusts the aperture size of the through holes on the perforated layer 1 of the sound-absorbing unit panels 100 in different parts, the size of the honeycomb core 21, and the area ratio of the honeycomb core 21 and the porous material layer 22, so that the sound barriers in different parts have sound absorption performance for the noise frequency of the area.

[0041] The above are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should be regarded as the protection scope of the present invention.

Claims

1. A fully enclosed sound barrier, characterized in that: The invention comprises a sound absorbing unit plate (100), wherein the sound absorbing unit plate (100) comprises a perforated layer (1), a honeycomb interlayer (2), a damping layer (3) and a metal layer (4), wherein the perforated layer (1), the honeycomb interlayer (2), the damping layer (3) and the metal layer (4) are sequentially stacked to form a composite plate; the honeycomb interlayer (2) comprises a plurality of honeycomb cores (21) and a porous material layer (22), wherein the porous material layer (22) is arranged around the plurality of honeycomb cores (21); the perforated layer (1) is provided with a plurality of through holes, wherein the through holes are arranged in a one-to-one correspondence with the honeycomb cores (21), and the through holes pass through the center of the circle. The axis overlaps with the central axis of the honeycomb core (21); two adjacent sound absorbing unit panels (100) are connected via a connecting assembly, the connecting assembly comprising an I-beam (5), a movable baffle (6) and at least two clamping grooves (7), the movable baffle (6) being arranged on the upper crossbeam of the I-beam (5), the clamping grooves (7) being symmetrically arranged on both sides of the longitudinal beam of the I-beam (5), the sound absorbing unit panels (100) being clamped in the clamping grooves (7), and the I-beam (5), the movable baffle (6), the clamping grooves (7) and the sound absorbing unit panels (100) being fixed via fasteners; the number of the sound absorbing unit panels (100) is five, namely, A sound absorbing unit panel (101), a second sound absorbing unit panel (102), a third sound absorbing unit panel (103), a fourth sound absorbing unit panel (104) and a fifth sound absorbing unit panel (105), wherein the first sound absorbing unit panel (101), the second sound absorbing unit panel (102), the third sound absorbing unit panel (103), the fourth sound absorbing unit panel (104) and the fifth sound absorbing unit panel (105) are sequentially connected to form a circular arch structure, the third sound absorbing unit panel (103) is arranged at the top of the circular arch structure, the first sound absorbing unit panel (101) and the fifth sound absorbing unit panel (105) are symmetrically arranged at the bottom of the circular arch structure, and the The second sound absorbing unit panel (102) and the fourth sound absorbing unit panel (104) are symmetrically arranged in the middle of the arch structure; the honeycomb core (21) and the porous material layer (22) of the third sound absorbing unit panel (103) have an area ratio of 2:1; the second sound absorbing unit panel (102) and the fourth sound absorbing unit panel (104) have the same structure, and the honeycomb core (21) and the porous material layer (22) have an area ratio of 1:1; the first sound absorbing unit panel (101) and the fifth sound absorbing unit panel (105) have the same structure, and the honeycomb core (21) and the porous material layer (22) have an area ratio of 3:

1.

2. The fully enclosed sound barrier according to claim 1, characterized in that: The perforated layer (1) comprises a perforated plate (12) and a protective plate (11), wherein the protective plate (11) is arranged around the periphery of the perforated plate (12).

3. The fully enclosed sound barrier according to claim 2, characterized in that: The perforated plate (12) is arranged above the plurality of honeycomb cores (21); the area of ​​the perforated plate (12) is greater than or equal to the area of ​​the plurality of honeycomb cores (21); and the protective plate (11) is arranged above the porous material layer (22).

4. The fully enclosed sound barrier according to claim 1, characterized in that: The metal layer (4) is a U-shaped structure.

5. The fully enclosed sound barrier according to claim 1, characterized in that: A rubber fixing seat (8) is provided between the movable baffle (6) and the clamping slot (7).

6. The fully enclosed sound barrier according to claim 1, characterized in that: A limiting rubber pad (9) is also provided between the sound absorbing unit plate (100) and the lower cross beam of the I-beam (5).

7. The fully enclosed sound barrier according to claim 1, characterized in that: The diameter of the through holes on the perforated layer (1) of the third sound absorbing unit panel (103) is 0.7 mm to 1 mm.

8. The fully enclosed sound barrier according to claim 1, characterized in that: The side length of the honeycomb core (21) of the third sound absorbing unit panel (103) is 3 mm to 4 mm.

9. The fully enclosed sound barrier according to claim 1, characterized in that: The diameter of the through holes on the perforated layer (1) of the first sound absorbing unit panel (101) and the fifth sound absorbing unit panel (105) is 0.2 mm to 0.7 mm.

10. The fully enclosed sound barrier according to claim 1, characterized in that: The side length of the honeycomb core (21) of the first sound absorbing unit panel (101) and the fifth sound absorbing unit panel (105) is 4 mm to 10 mm.

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