Novel metal perforated plate PET sound absorption wedge

Abstract

The utility model relates to the technical field of building construction, in particular to a novel metal perforated plate PET sound absorption wedge which comprises a closed shell formed between a vertical face and a side plug, an arc-shaped buckle plate is arranged on the lower side of the end portion of the side plug, an arc-shaped installation cavity is formed in the inner side of the upper end portion of the vertical face, and a metal perforated plate is arranged in the arc-shaped installation cavity. The arc-shaped buckle plate is arranged in the arc-shaped installation cavity, meanwhile, the vertical face is sleeved with a lower outer sleeve, the side plug is sleeved with an upper outer sleeve, and the lower outer sleeve and the upper outer sleeve are fixed through magnetic connection. According to the utility model, through the design of the sealing sleeve layer between the lower outer sleeve and the upper outer sleeve which are magnetically connected and fixed, the sealing performance of the wedge absorber is ensured, and meanwhile, the stability of the structure can be ensured by magnetic connection and elastic sealing materials even under the condition of vibration or temperature change, so that the leakage of air or sound can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of building construction, in particular to a novel metal perforated plate PET sound-absorbing wedge. Background Art

[0002] The wedge structure first appeared in the 1940s, boasting a history of over 60 years. The wedge structure, which gradually increases in size from top to bottom, provides a large absorption area while matching the air impedance (known as the gradual transition theory).

[0003] Acoustic impedance is defined as the property of a substance that resists the propagation of sound waves:

[0004] Z=ρ·c

[0005] Where: Z is the acoustic resistance, ρ is the medium density, and c is the speed of sound.

[0006] The molecular structure and inertness of a substance's components affect acoustic impedance, which is particularly high at the interface between two dissimilar materials. When the impedance difference between different materials is large, the vast majority of the sound wave energy will be reflected. When the impedance difference between different materials is small, the sound wave will be transmitted into the porous sound-absorbing material.

[0007] Absorbent materials contain numerous small gaps and cavities. Incident sound waves propagate through these gaps, oscillating back and forth repeatedly within them. Friction and air resistance within these gaps convert the sound wave's energy into heat. Maximum absorption occurs when the absorbent material is positioned at the peak of the sound wave. This maximum absorption occurs at a distance of λ / 4 from the reflecting wall. Therefore, the wedge length is typically determined based on the cutoff frequency of λ / 4.

[0008] Currently known wedges can be divided into a tip and a base. During installation, an air layer is left between the tip and the wall. Its structure consists of a frame of a certain shape and size made of 3.2-3.5mm diameter steel wire, covered with a covering material such as fiberglass cloth or plastic window screen, and filled with a porous material such as glass wool felt, glass fiber, slag wool, or foam plastic. From the tip to the base of the wedge, the acoustic impedance gradually transitions from the characteristic impedance of air to the impedance of the porous material, achieving excellent impedance matching and effectively absorbing incident sound energy.

[0009] However, existing metal wedges on the market have issues with thickness seams at the corners and edges, resulting in gaps during installation. This can cause instability in the acoustic field of the acoustic laboratory and hinder experimental data. Therefore, a new perforated metal PET sound-absorbing wedge was proposed to address this gapping issue. Utility Model Content

[0010] The purpose of the utility model is to provide a novel metal perforated plate PET sound absorbing wedge to solve the problem of gaps in the metal wedge during installation proposed in the above background technology.

[0011] The technical solution of the present utility model is: a new type of metal perforated plate PET sound-absorbing wedge, including an outer shell, a vertical surface is provided on the side of the outer shell, a side plug is provided at the end of the vertical surface, and a closed outer shell is formed between the vertical surface and the side plug, and an arc-shaped buckle plate is provided on the lower side of the end of the side plug, and an arc-shaped installation cavity is provided on the inner side of the upper end of the vertical surface, and the arc-shaped buckle plate is arranged inside the arc-shaped installation cavity. At the same time, the outer side of the vertical surface is provided with a lower outer sleeve, and the outer side of the side plug is provided with an upper outer sleeve, the lower outer sleeve is arranged on the outside of the arc-shaped installation cavity, and the upper outer sleeve is arranged on the outside of the arc-shaped buckle plate, and the lower outer sleeve and the upper outer sleeve are fixed by a magnetic connection.

[0012] Furthermore, a metal connector is provided at the upper end of the lower outer sleeve, and a connecting cavity is opened at both ends of the upper outer sleeve. An internal magnetic part is provided at the inner top of the connecting cavity. The metal connector is provided inside the connecting cavity, and the metal connector and the internal magnetic part are magnetically connected.

[0013] Furthermore, the lower outer sleeve includes but is not limited to a magnetic sealing strip.

[0014] Furthermore, the space between the lower outer sleeve and the outside of the facade, and the space between the upper outer sleeve and the outside of the side plug are filled with a sealing sleeve layer.

[0015] Furthermore, the dimensions of the arc-shaped installation cavity and the arc-shaped gusset plate are designed to satisfy the following formula, specifically:

[0016]

[0017] Where: D 入口 is the entrance diameter of the arc-shaped installation cavity, D is the diameter of the sealing sleeve, δ is the compression of the sealing sleeve, Δ is the additional space reserved for the transition section of the arc-shaped installation cavity, and L 过渡 is the length of the transition section of the arc-shaped installation cavity, θ is the angle of the transition section of the arc-shaped installation cavity, R 扣板 is the inner curvature radius of the arc-shaped gusset plate, R 密封 is the outer curvature radius of the sealing sleeve layer, and ε is the radial distance corresponding to the preload force.

[0018] Furthermore, the shell is a perforated plate, the perforation rate of the shell is 25%-45%, and the pore diameter of the shell is 2mm-5mm.

[0019] Furthermore, the thickness of the shell is set to 0.8mm-1.2mm.

[0020] The present invention provides a novel metal perforated plate PET sound absorbing wedge through improvement, which has the following improvements and advantages compared with the prior art:

[0021] Firstly, the sealing sleeve design between the lower and upper outer sleeves, which is fixed by magnetic connection, ensures the sealing performance of the sound-absorbing wedge. At the same time, even in the case of vibration or temperature changes, the magnetic connection and elastic sealing material can ensure the stability of the structure, thereby reducing the leakage of air or sound.

[0022] Secondly, the utility model simplifies the installation process through the design of magnetic connection, making the assembly and disassembly of the sound-absorbing wedge easier and faster, and can achieve rapid installation and maintenance without complicated tools or additional manpower;

[0023] Third: The perforation rate and aperture design of the perforated plate shell of the utility model, combined with the internal PET sound-absorbing material, can effectively absorb sound wave energy and reduce noise levels. At the same time, the elastic properties of the shell help to further enhance the sound absorption effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further explained below with reference to the accompanying drawings and embodiments:

[0025] The present invention will be further explained below with reference to the accompanying drawings and embodiments:

[0026] Figure 1 This is a schematic structural diagram of the novel metal perforated plate PET sound-absorbing wedge of the utility model;

[0027] Figure 2 It is a schematic diagram of the connection structure between the facade and the side blocking of the utility model;

[0028] Figure 3 This is a schematic diagram of the installation structure of the sealing sleeve layer of the utility model;

[0029] Description of reference numerals:

[0030] 1. Outer shell; 11. Vertical surface; 111. Arc-shaped installation cavity; 112. Metal connector; 113. Lower outer sleeve; 12. Side plug; 121. Arc-shaped gusset plate; 122. Upper outer sleeve; 123. Inner magnetic part; 124. Connection cavity; 13. Sealing sleeve. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] It should be noted that, in the description of the present invention, the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0033] Furthermore, it should be understood that for the sake of ease of description, the sizes of the various components shown in the drawings are not drawn according to actual proportions. For example, the thickness or width of certain layers may be exaggerated relative to other layers.

[0034] It should be noted that like numbers and letters represent similar items in the following figures, so once an item is defined or described in one figure, it will not need to be further discussed and described in detail in the description of the subsequent figures.

[0035] refer to Figure 1-Figure 3 This embodiment provides a new type of metal perforated plate PET sound-absorbing wedge, which includes an outer shell 1 and a PET-type sound-absorbing material filling the interior of the outer shell 1, wherein the outer shell 1 is a sealed shell formed between a facade 11 and a side plug 12. That is, the side of the outer shell 1 is provided with a facade 11, and the end of the facade 11 is provided with a side plug 12, and the facade 11 and the side plug 12 are combined to form a sealed outer shell 1. Specifically, the outer shell 1 in this embodiment is a perforated plate with a perforation rate of 25%-45%, a pore diameter of 2mm-5mm, and a thickness of 0.8mm-1.2mm. It is worth noting that the outer shell 1 is an elastic plate, which can be elastically deformed and automatically restored.

[0036] In this embodiment, an arc-shaped gusset plate 121 is provided on the lower side of the end of the side plug 12, an arc-shaped installation cavity 111 is provided on the inner side of the upper end of the facade 11, and the arc-shaped gusset plate 121 is provided inside the arc-shaped installation cavity 111. At the same time, a lower outer sleeve 113 is provided on the outside of the facade 11, and an upper outer sleeve 122 is provided on the outside of the side plug 12, and the lower outer sleeve 113 and the upper outer sleeve 122 are fixed by a magnetic connection. It is worth noting that the space between the lower outer sleeve 113 and the outside of the facade 11, and between the upper outer sleeve 122 and the outside of the side plug 12 are filled with a sealing sleeve layer 13. At the same time, the sealing sleeve layer 13 can be fixed to the outside of the facade 11 and the outside of the side plug 12 by gluing. That is to say, the sealing effect can be further enhanced by the provision of the sealing sleeve layer 13.

[0037] Furthermore, the lower outer sleeve 113 is disposed outside the arc-shaped mounting cavity 111, and the upper outer sleeve 122 is disposed outside the arc-shaped pinch plate 121. A metal connector 112 is disposed at the upper end of the lower outer sleeve 113, and a connecting cavity 124 is formed at both ends of the upper outer sleeve 122. An internal magnetic member 123 is disposed at the top end of the connecting cavity 124. The metal connector 112 is disposed within the connecting cavity 124, and the metal connector 112 and the internal magnetic member 123 are magnetically connected. It is worth noting that the lower outer sleeve 113 in this embodiment is configured as a magnetic sealing strip, thereby providing a better sealing effect.

[0038] Furthermore, the dimensions of the arc-shaped installation cavity 111 and the arc-shaped pinch plate 121 are designed to satisfy the following formula:

[0039]

[0040] Among them: Among them: D 入口 is the entrance diameter of the arc-shaped installation cavity, D is the diameter of the sealing sleeve, δ is the compression of the sealing sleeve, Δ is the additional space reserved for the transition section of the arc-shaped installation cavity, and L 过渡 is the length of the transition section of the arc-shaped installation cavity, θ is the angle of the transition section of the arc-shaped installation cavity, R 扣板 is the inner curvature radius of the arc-shaped gusset plate, R 密封 is the outer curvature radius of the sealing sleeve layer, and ε is the radial distance corresponding to the preload force.

[0041] That is, the workflow of the novel metal perforated plate PET sound absorbing wedge in this embodiment is as follows:

[0042] After passing through the small holes in the outer shell 1, the sound waves enter the interior of the sound-absorbing wedge. As the sound waves propagate through the PET sound-absorbing material, the porosity of the material converts the sound wave energy into heat, thereby achieving the sound absorption effect. It is worth noting that the magnetic connection between the lower outer sleeve 113 and the upper outer sleeve 122 ensures the sound-absorbing wedge's tightness, preventing sound wave diffraction or leakage, while also ensuring that the wedge can be securely installed in its intended location.

[0043] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A novel metal perforated plate PET sound absorbing wedge comprises a shell (1), a side of the shell (1) is provided with a vertical surface (11), an end of the vertical surface (11) is provided with a side plug (12), and a sealed shell (1) is formed between the vertical surface (11) and the side plug (12), characterized in that: An arc-shaped gusset plate (121) is provided on the lower side of the end of the side plug (12), an arc-shaped installation cavity (111) is provided on the inner side of the upper end of the vertical surface (11), and the arc-shaped gusset plate (121) is arranged inside the arc-shaped installation cavity (111). At the same time, a lower outer sleeve (113) is provided on the outside of the vertical surface (11), and an upper outer sleeve (122) is provided on the outside of the side plug (12), and the lower outer sleeve (113) is provided on the outside of the arc-shaped installation cavity (111). The upper outer sleeve (122) is provided on the outside of the arc-shaped gusset plate (121), and the lower outer sleeve (113) and the upper outer sleeve (122) are fixed by a magnetic connection.

2. The novel metal perforated plate PET sound absorbing wedge according to claim 1 is characterized in that: The upper end of the lower outer sleeve (113) is provided with a metal connector (112), and both ends of the upper outer sleeve (122) are provided with a connecting cavity (124), the inner top end of the connecting cavity (124) is provided with an inner magnetic part (123), the metal connector (112) is arranged inside the connecting cavity (124), and the metal connector (112) and the inner magnetic part (123) are magnetically connected.

3. A novel metal perforated plate PET sound absorbing wedge according to claim 1 or 2, characterized in that: The lower outer sleeve (113) includes but is not limited to a magnetic sealing strip.

4. A novel metal perforated plate PET sound absorbing wedge according to claim 1 or 2, characterized in that: The space between the lower outer sleeve (113) and the outside of the vertical surface (11), and the space between the upper outer sleeve (122) and the outside of the side plug (12) are filled by a sealing sleeve layer (13).

5. The novel metal perforated plate PET sound absorbing wedge according to claim 1 is characterized in that: The dimensions of the arc-shaped installation cavity (111) and the arc-shaped gusset plate (121) are designed to satisfy the following formula, specifically: Where: D 入口 is the entrance diameter of the arc-shaped installation cavity, D is the diameter of the sealing sleeve, δ is the compression of the sealing sleeve, Δ is the additional space reserved for the transition section of the arc-shaped installation cavity, and L 过渡 is the length of the transition section of the arc-shaped installation cavity, θ is the angle of the transition section of the arc-shaped installation cavity, R 扣板 is the inner curvature radius of the arc-shaped gusset plate, R 密封 is the outer curvature radius of the sealing sleeve layer, and ε is the radial distance corresponding to the preload force.

6. The novel metal perforated plate PET sound absorbing wedge according to claim 1 is characterized in that: The shell (1) is a perforated plate, and the perforation rate of the shell (1) is 25%-45%, and the pore diameter of the shell (1) is 2mm-5mm.

7. A novel metal perforated plate PET sound absorbing wedge according to claim 1 or 6, characterized in that: The thickness of the shell (1) is set to 0.8 mm-1.2 mm.

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