Sound absorbing and noise reducing wall panel grid internal construction

Abstract

The utility model relates to building acoustics material technical field discloses sound absorption and noise reduction wallboard grid internal structure, including a plurality of frames, the inner wall rear side of a plurality of frame all is fixedly connected with primary sound absorption board, the outer wall front side of a plurality of primary sound absorption board all is fixedly connected with sound insulation damping layer, the outer wall front side of a plurality of sound insulation damping layer all is fixedly connected with resonance sound absorption frame, the inner wall upper and lower side of a plurality of resonance sound absorption frame all equidistance fixedly connected with a plurality of horizontal plates, the inner wall left and right side of a plurality of resonance sound absorption frame all is fixedly connected with a plurality of riser. In the utility model, frame provides support protection, creates conditions for internal sound absorption, primary sound absorption board, sound insulation damping layer, resonance structure, sound-absorbing board and sponge block act in proper order, from preliminary absorption to conversion sound energy, resonance sound absorption, secondary sound absorption and gap filling prevent sound leakage, comprehensively and efficiently reduce noise, solve the problem that the sound absorption function is lost due to sponge hardening.

Description

Technical Field

[0001] This utility model relates to the field of architectural acoustic materials technology, and in particular to the internal structure of sound-absorbing and noise-reducing wall panel grilles. Background Technology

[0002] With the acceleration of urbanization and the increasing demands of people for the quality of their living and working environments, indoor noise control is becoming increasingly important. Noise can affect people's work efficiency and quality of life. In order to reduce noise pollution, it is necessary to use the internal structure of sound-absorbing and noise-reducing wall panel grids.

[0003] Traditional reinforced concrete grid panels are used to create a sense of spatial layering. Installed in front of walls, they buffer against external impacts and friction, reducing wall damage. In high-traffic public places, the grid panels protect walls from scratches and wear, extending their lifespan. However, because traditional reinforced concrete grid panels have a hollow internal structure, they cannot isolate sound transmission or reduce noise. Existing technology fills the inside of the grid panels with sponge, utilizing the principle of sound absorption. When sound reaches the sponge, it absorbs and reduces noise. However, in actual use, since the grid panels are only filled with sponge, the noise absorption effect is limited. Furthermore, over time, the sponge hardens, losing its noise absorption function and reducing the practicality of the device. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides an internal structure for a sound-absorbing and noise-reducing wall panel grid, aiming to improve the existing technology where the wall grid panel is simply filled with sponge, which has limited noise absorption effect and the sponge hardens over time, thus losing its noise absorption function and reducing the practicality of the device.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: The internal structure of the sound-absorbing and noise-reducing wall panel grid includes multiple frames. Primary sound-absorbing panels are fixedly connected to the rear inner walls of each of the multiple frames. Sound-insulating damping layers are fixedly connected to the front outer walls of each of the primary sound-absorbing panels. Resonant sound-absorbing frames are fixedly connected to the front outer walls of each of the sound-insulating damping layers. Multiple horizontal plates are equidistantly fixedly connected to the upper and lower inner walls of each of the multiple resonant sound-absorbing frames. Multiple vertical plates are fixedly connected to the left and right inner walls of each of the multiple resonant sound-absorbing frames. The horizontal plates are respectively fixedly connected to the vertical plates. Sound-absorbing plates are fixedly connected to the front outer walls of each of the horizontal plates. Multiple sponge blocks are fixedly connected to the left and right front ends of the outer walls of each of the multiple sound-absorbing plates. The front ends of each sponge block are respectively fixedly connected to the corresponding frames. Sliding grooves are provided on the upper and lower outer walls of each of the multiple frames. Rubber strips are slidably connected to the inner walls of each of the multiple sliding grooves. Quick-connect mechanisms are provided between adjacent frames, and these quick-connect mechanisms are used to quickly connect the multiple frames.

[0006] As a further description of the above technical solution: The quick-connect mechanism includes multiple protrusions, which are fixedly connected to the left side of the outer wall of the multiple frames. The upper and lower sides of the outer wall of the multiple protrusions are provided with reserved grooves, and the right side of the outer wall of the multiple frames is provided with grooves. The multiple protrusions are slidably connected to the corresponding grooves. The upper and lower sides of the inner wall of the multiple grooves are provided with sliding grooves. The inner wall of the multiple sliding grooves is fixedly connected with springs. The adjacent ends of the multiple springs are fixedly connected with locking blocks, and the multiple locking blocks are engaged with the corresponding reserved grooves.

[0007] As a further description of the above technical solution: Multiple mounting slots are provided on the rear side of the outer wall of the multiple frames, and screws are threaded onto the inner wall of the multiple mounting slots.

[0008] As a further description of the above technical solution: The front ends of the screws are provided with cross grooves, and the surfaces of the screws are all smoothed.

[0009] As a further description of the above technical solution: Each of the multiple rubber strips has a reinforcing rib (I) fixedly connected to its inner left and right sides, and each of the multiple reinforcing ribs (I) is fixedly connected to an adjacent reinforcing rib (II).

[0010] As a further description of the above technical solution: The outer wall of the silencing plate has multiple silencing holes on its rear side, and the spacing between the multiple silencing holes is equal.

[0011] As a further description of the above technical solution: Multiple mounting plates are fixedly connected to the front side of the outer wall of each of the multiple frames, and hooks are fixedly connected to the front side of the outer wall of each of the multiple mounting plates.

[0012] As a further description of the above technical solution: The upper and lower sides of the left ends of the multiple protrusions are rounded, and the surfaces of the multiple protrusions are smoothed.

[0013] This utility model has the following beneficial effects: In this invention, the frame provides support and protection, creating conditions for internal sound absorption. The primary sound-absorbing panel, sound insulation damping layer, resonant structure, sound-absorbing panel, and sponge block work in sequence, from initial absorption to conversion of sound energy, resonant sound absorption, secondary sound absorption, and filling gaps to prevent sound leakage, thus comprehensively and efficiently reducing noise. The sliding groove and rubber strip not only facilitate splicing but also seal against sound leakage, reduce vibration, and lower secondary noise. Overall, it avoids the problem of sound absorption function loss due to sponge hardening, greatly improving the practicality of the device.

[0014] In this invention, when installing the wall panel grille, it is only necessary to align the protrusion of one frame with the groove of another frame and push it to achieve a quick connection, which greatly shortens the installation time and improves construction efficiency. Secondly, through the cooperation of springs, locking blocks, and reserved grooves, the connection is stable and reliable, can withstand a certain amount of external force, and is not easy to loosen, ensuring the stability of the overall structure of the wall panel grille. Compared with traditional connection methods, no complicated tools and cumbersome steps are required, reducing the difficulty and cost of installation. It can easily handle both large-scale engineering construction and small space decoration, providing great convenience for the installation and use of wall panel grilles. Attached Figure Description

[0015] Figure 1 This is a perspective view of the internal structure of the sound-absorbing and noise-reducing wall panel grille proposed in this utility model; Figure 2 This is a partial structural exploded view of the internal structure of the sound-absorbing and noise-reducing wall panel grid proposed in this utility model; Figure 3 A schematic diagram of the rubber strips inside the sound-absorbing and noise-reducing wall panel grille proposed in this utility model; Figure 4 This is a schematic diagram of the sound-absorbing plate inside the sound-absorbing and noise-reducing wall panel grid proposed in this utility model; Figure 5 A schematic diagram of the quick-connect mechanism for the internal structure of the sound-absorbing and noise-reducing wall panel grille proposed in this utility model; Figure 6 This is a schematic diagram of the hooks inside the sound-absorbing and noise-reducing wall panel grille proposed in this utility model.

[0016] Legend: 1. Frame; 2. Quick-connect mechanism; 201. Protrusion; 202. Reserved groove; 203. Groove; 204. Sliding groove; 205. Spring; 206. Locking block; 3. Primary sound-absorbing panel; 4. Sound insulation damping layer; 5. Resonant sound-absorbing frame; 6. Horizontal plate; 7. Vertical plate; 8. Sound-absorbing panel; 9. Sponge block; 10. Sliding groove; 11. Rubber strip; 12. Mounting groove; 13. Screw; 14. Cross groove; 15. Reinforcing rib one; 16. Reinforcing rib two; 17. Sound-absorbing hole; 18. Mounting plate; 19. Hook. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Reference Figure 1 , Figure 2 and Figure 3 This utility model provides an embodiment of a sound-absorbing and noise-reducing wall panel grille internal structure, including multiple frames 1. The frames 1 serve as the basic support structure for the entire wall panel grille, providing mounting carriers for internal components and maintaining the overall shape. Primary sound-absorbing panels 3 are fixedly connected to the rear inner walls of each of the multiple frames 1, utilizing their material and structure to initially absorb external sound. Sound-insulating damping layers 4 are fixedly connected to the front outer walls of each of the multiple primary sound-absorbing panels 3. The sound-insulating damping layers 4, through their damping characteristics, convert sound energy into heat energy, further reducing sound intensity. Resonant sound-absorbing frames 5 are fixedly connected to the front outer walls of each of the multiple sound-insulating damping layers 4. The resonant sound-absorbing frames 5, together with the connected components, constitute a resonant structure. Multiple resonant sound-absorbing... Multiple horizontal plates 6 are fixedly connected at equal intervals to the upper and lower sides of the inner wall of the sound frame 5. Multiple vertical plates 7 are fixedly connected to the left and right sides of the inner wall of the multiple resonant sound-absorbing frames 5. The vertical plates 7 also play a role in enhancing structural stability and work in conjunction with the horizontal plates 6 to optimize the sound absorption effect. The multiple horizontal plates 6 are fixedly connected to the multiple vertical plates 7. This connection method strengthens the stability of the internal structure of the resonant sound-absorbing frame 5 and ensures that the resonant structure can play an effective role. The front side of the outer wall of the multiple horizontal plates 6 is fixedly connected to the sound-absorbing plate 8. With its unique structure and material, it further reduces the sound intensity by performing sound absorption treatment. The left and right sides of the front end of the outer wall of the multiple sound-absorbing plate 8 are fixedly connected to the sponge blocks 9. Utilizing its porous structure, To absorb residual sound and fill the gap between frame 1 and sound-absorbing plate 8, preventing sound leakage, the front ends of multiple sponge blocks 9 are fixedly connected to the corresponding frames 1 to ensure the stability of the sponge blocks 9 and enable them to continuously and effectively perform sound absorption and sealing functions. The upper and lower sides of the outer walls of multiple frames 1 are provided with grooves 10 to provide installation and sliding space for rubber strips 11. Rubber strips 11 are slidably connected to the inner walls of multiple grooves 10. The rubber strips 11 act as a seal when splicing the wall panel grid, reducing sound leakage from the joints and absorbing some vibration to reduce secondary noise caused by wall panel vibration. Quick-connect mechanisms 2 are provided between adjacent frames 1 for quick connection of multiple... Each frame 1 has multiple mounting slots 12 on the rear side of its outer wall, providing mounting positions for screws 13 so that the wall panel grille can be installed and fixed in the target position. The inner walls of the multiple mounting slots 12 are threaded with screws 13. Through the threaded connection, the screws 13 can be firmly fixed in the mounting slots 12, ensuring the stability of the wall panel grille installation. The front end of each screw 13 has a cross-shaped groove 14, which facilitates the use of screwdrivers and other tools to tighten the screws 13. The surface of each screw 13 is smoothed. The smoothed surface reduces the friction during the tightening process, making the operation smoother, while also reducing the wear on the screw surface and extending its service life. Specifically, sound first contacts the supporting and protective frame 1, passes through the frame 1, and reaches the primary sound-absorbing panel 3. The primary sound-absorbing panel 3, with its special material and structure, initially absorbs sound and reduces sound energy. Then, the sound travels to the sound-insulating damping layer 4. The sound-insulating damping layer 4 uses its damping properties to convert sound energy into heat energy, further weakening the sound intensity. Next, the sound enters the resonant structure composed of the horizontal plate 6, the vertical plate 7, and the resonant sound-absorbing frame 5. When the sound frequency is close to the natural frequency of this structure, resonance is triggered to absorb more sound energy. The horizontal plate 6 and the vertical plate 7 enhance the structural stability while increasing the sound reflection and absorption path and area. The sound-absorbing panel 8 then performs sound attenuation treatment, consuming sound energy through its own structure and material. The porous sponge block 9 absorbs the remaining sound and fills the gap between the frame 1 and the sound-absorbing panel 8 to prevent sound leakage. The sliding groove 10 on the frame 1 and the internal sliding connection... Rubber strip 11 is used for splicing wall panel grilles. Rubber strip 11 acts as a seal to reduce sound leakage from the joint and absorbs some vibration to reduce secondary noise caused by wall panel vibration, thus achieving sound absorption and noise reduction in all aspects. Multiple mounting slots 12 on the rear side of the outer wall of frame 1 provide specific installation positions for screws 13. The operator uses a screwdriver to make the screws 13 engage with the threads on the inner wall of the mounting slot 12. Due to the spiral structure of the threads, the rotational force is converted into axial thrust, causing the screws 13 to be screwed into the mounting slots 12. The smooth surface of the screws 13 effectively reduces the friction during screwing, making the installation smoother and reducing the installation difficulty. It also avoids the wear of the screw surface due to excessive friction, which would affect the fastening performance. Finally, by screwing the screws 13 into the mounting slots 12, the sound-absorbing and noise-reducing wall panel grilles are firmly installed in the target position such as the wall, ensuring that they can continue to effectively perform their sound absorption and noise reduction functions.

[0019] Reference Figure 1 , Figure 3 and Figure 5The quick-connect mechanism 2 includes multiple protrusions 201, which are fixedly connected to the left side of the outer wall of multiple frames 1, providing an initial docking structure for the connection between the frames 1. The upper and lower sides of the outer walls of the multiple protrusions 201 are provided with reserved grooves 202 for engaging with locking blocks 206. The right side of the outer walls of the multiple frames 1 is provided with grooves 203, which are adapted to the protrusions 201. The multiple protrusions 201 are slidably connected to their corresponding grooves 203. This sliding connection method makes the docking operation between the frames 1 convenient and smooth, facilitating rapid installation. The upper and lower sides of the inner walls of the multiple grooves 203 are provided with sliding grooves 204, which provide installation positions for springs 205 and locking blocks 206, ensuring they have reasonable movement space within the grooves 203. Springs 205 are fixedly connected to the inner walls of the multiple sliding grooves 204. The springs 205, as elastic elements, store and release energy during the connection process. The energy is released to provide power for the extension and retraction of the locking block 206. The adjacent ends of multiple springs 205 are fixedly connected to the locking block 206. The locking block 206 interacts with the reserved slot 202. When the two are aligned, the locking block 206 is locked into the reserved slot 202 under the action of the spring 205, realizing a firm lock between the frames 1. Multiple locking blocks 206 are respectively engaged with the corresponding reserved slots 202, ensuring the stability of the frame 1 after connection and preventing the frame 1 from being accidentally separated during use. The upper and lower sides of the left end of multiple protrusions 201 are rounded. The rounded ends play a guiding role when inserted into the groove 203, making the insertion process easier and avoiding scratching the operator's hands and the inner wall of the groove 203. The surface of multiple protrusions 201 is smoothed. The smoothed surface can effectively reduce the friction when the protrusions 201 slide in the groove 203, making the connection operation more effortless and smooth, and improving the connection efficiency. Specifically, when connecting two frames 1, align the protrusion 201 on the left side of one frame 1 with the groove 203 on the right side of the other frame 1, and push it to slide into connection. As the protrusion 201 slides within the groove 203, the locking block 206 connected to the spring 205 in the sliding groove 204 on the upper and lower sides of the inner wall of the groove 203 will be compressed by the protrusion 201. Due to the elasticity of the spring 205, it will be compressed at this time, and the locking block 206 will retract into the sliding groove 204. When the protrusion 201 continues to slide, and the reserved groove 202 on it moves to the position aligned with the locking block 206, the spring 205... 5 will rebound due to its own elasticity, pushing the locking block 206 into the corresponding reserved slot 202. In this way, the two frames 1 are quickly and firmly connected together through the quick-connect mechanism 2. While ensuring the convenience of installation, it also ensures the stability of the entire wall panel grid structure. When the frame 1 is connected, the smooth end makes it easier to guide the protrusion 201 into the groove 203 during the alignment and insertion process, reducing the difficulty of insertion caused by sharp edges and corners, avoiding scratch damage to the inner wall of the groove 203, and also reducing the potential risk of the operator's hands being cut.

[0020] Reference Figure 1 , Figure 4 and Figure 6 Multiple rubber strips 11 are fixedly connected to the left and right sides of their interior with reinforcing ribs 15 to enhance the lateral strength of the rubber strips 11 and prevent them from deforming when squeezed or stretched. Multiple reinforcing ribs 16 are fixedly connected between adjacent reinforcing ribs 15 to further strengthen the internal structure of the rubber strips 11. Multiple sound-absorbing holes 17 are opened on the rear side of the outer wall of the sound-absorbing plate 8 to allow sound to enter the interior of the sound-absorbing plate 8. Through the complex structure inside the holes and air vibration, the sound energy is further consumed. The spacing between the multiple sound-absorbing holes 17 is equal. Multiple mounting plates 18 are fixedly connected to the front side of the outer wall of multiple frames 1 to provide a stable mounting base for hooks 19. Hooks 19 are rotatably connected to the front side of the outer wall of multiple mounting plates 18 to facilitate users to adjust their angle according to actual needs for hanging various related items. Specifically, the reinforcing rib 15 enhances the overall strength of the rubber strip 11, making it less prone to deformation or damage when subjected to external pressure or tension, thus better maintaining its shape and function and ensuring the sealing of the wall panel grille joints. Multiple reinforcing ribs 16 connect between the reinforcing ribs 15, further strengthening the structural stability of the rubber strip 11. Multiple sound-absorbing holes 17 help to further dissipate sound energy after sound enters the sound-absorbing holes 17, through the complex structure inside the holes and air vibration. The equidistant distribution makes the sound absorption effect more uniform, comprehensively improving the absorption and attenuation capabilities of the sound-absorbing plate 8 for different frequencies of sound, and optimizing the sound absorption performance of the entire sound-absorbing and noise-reducing wall panel grille. The mounting plate 18 provides an installation base for the hooks 19, which can be used to hang some related items, increasing the functionality and flexibility of the wall panel grille.

[0021] Working principle: When sound is received, it first encounters frame 1, which provides support and protection for the internal sound-absorbing structure. After passing through frame 1, the sound comes into contact with the primary sound-absorbing panel 3, whose material and structure initially absorb the sound and reduce the sound energy. Then, the sound travels to the sound insulation damping layer 4, where the damping characteristics convert the sound energy into heat energy, weakening the sound intensity. Subsequently, the sound enters the resonant structure composed of horizontal plate 6, vertical plate 7, and resonant sound-absorbing frame 5. When the sound frequency is close to the natural frequency of the structure, resonance is triggered, absorbing the sound energy. Horizontal plate 6 and vertical plate 7 enhance the structural stability, increasing the sound reflection and absorption path and area. Afterward, the sound-absorbing panel 8 processes the sound, consuming the sound energy through its own structure and material. The porous sponge block 9 absorbs the remaining sound, filling the gap between frame 1 and sound-absorbing panel 8 to prevent sound leakage. In addition, the sliding groove 10 and rubber strip 11 on frame 1 are used for splicing the wall panel grille. The rubber strip 11 acts as a seal, reducing sound leakage from the joint and absorbing vibration to reduce secondary noise. Through the cooperation of these structures, the wall panel grille achieves the function of sound absorption and noise reduction, creating a quiet space environment. Furthermore, when connecting two frames 1, the operation begins with the engagement of the protrusion 201 and the groove 203. The protrusion 201 on the left side of one frame 1 is precisely aligned with the groove 203 on the right side of the other frame 1. Then, it is pushed to allow the protrusion 201 to slide into the groove 203, achieving a sliding connection. During the sliding of the protrusion 201 within the groove 203, the locking block 206, connected by a spring 205, is compressed by the protrusion 201 within the sliding grooves 204 on the upper and lower sides of the inner wall of the groove 203. This is because the spring 205 has elasticity. When the spring 205 is compressed, it contracts, causing the locking block 206 to retract into the sliding groove 204. As the protrusion 201 continues to slide, when the reserved groove 202 on the protrusion 201 moves to the position aligned with the locking block 206, the spring 205 rebounds by its own elastic force, pushing the locking block 206 forward so that it is locked into the corresponding reserved groove 202. Thus, the two frames 1 are quickly and stably connected by the quick-connect mechanism 2, which not only ensures the convenience of the installation process but also ensures the stability of the entire wall panel grid structure.

[0022] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. The internal structure of the sound-absorbing and noise-reducing wall panel grid, comprising multiple frames (1), characterized in that: A primary sound-absorbing panel (3) is fixedly connected to the rear side of the inner wall of each of the multiple frames (1). A sound-insulating damping layer (4) is fixedly connected to the front side of the outer wall of each of the multiple primary sound-absorbing panels (3). A resonant sound-absorbing frame (5) is fixedly connected to the front side of the outer wall of each of the multiple sound-insulating damping layers (4). A multiple horizontal plate (6) is fixedly connected at equal intervals to the upper and lower sides of the inner wall of each of the multiple resonant sound-absorbing frames (5). A multiple vertical plate (7) is fixedly connected to the left and right sides of the inner wall of each of the multiple resonant sound-absorbing frames (5). The multiple horizontal plates (6) are fixedly connected to the multiple vertical plates (7) respectively. A sound-absorbing plate (8) is fixedly connected to the front side of the outer wall of the horizontal plate (6). Multiple sponge blocks (9) are fixedly connected to the left and right sides of the front end of the outer wall of the multiple sound-absorbing plates (8). The front ends of the multiple sponge blocks (9) are fixedly connected to the corresponding frames (1). Slide grooves (10) are opened on the upper and lower sides of the outer wall of the multiple frames (1). Rubber strips (11) are slidably connected to the inner wall of the multiple slide grooves (10). Quick-connect mechanism (2) is provided between the adjacent frames (1). The quick-connect mechanism (2) is used to quickly connect the multiple frames (1).

2. The internal structure of the sound-absorbing and noise-reducing wall panel grille according to claim 1, characterized in that: The quick-connect mechanism (2) includes multiple protrusions (201), which are fixedly connected to the left side of the outer wall of multiple frames (1). The upper and lower sides of the outer wall of the multiple protrusions (201) are provided with reserved grooves (202), and the right side of the outer wall of multiple frames (1) is provided with grooves (203). The multiple protrusions (201) are slidably connected to the corresponding grooves (203). The upper and lower sides of the inner wall of the multiple grooves (203) are provided with sliding grooves (204). The inner walls of the multiple sliding grooves (204) are fixedly connected with springs (205). The adjacent ends of the multiple springs (205) are fixedly connected with locking blocks (206), and the multiple locking blocks (206) are engaged with the corresponding reserved grooves (202).

3. The internal structure of the sound-absorbing and noise-reducing wall panel grille according to claim 1, characterized in that: Multiple mounting slots (12) are provided on the rear side of the outer wall of the multiple frames (1), and screws (13) are threaded onto the inner wall of the multiple mounting slots (12).

4. The internal structure of the sound-absorbing and noise-reducing wall panel grille according to claim 3, characterized in that: The front ends of the plurality of screws (13) are provided with cross grooves (14), and the surfaces of the plurality of screws (13) are all smoothed.

5. The internal structure of the sound-absorbing and noise-reducing wall panel grille according to claim 1, characterized in that: Each of the rubber strips (11) has a reinforcing rib (15) fixedly connected to its inner left and right sides, and each of the reinforcing ribs (15) has a reinforcing rib (2) fixedly connected to its adjacent sides.

6. The internal structure of the sound-absorbing and noise-reducing wall panel grille according to claim 1, characterized in that: The outer wall of the silencing plate (8) has a plurality of silencing holes (17) on the rear side, and the spacing between the plurality of silencing holes (17) is equal.

7. The internal structure of the sound-absorbing and noise-reducing wall panel grille according to claim 1, characterized in that: Multiple mounting plates (18) are fixedly connected to the front side of the outer wall of each of the multiple frames (1), and hooks (19) are rotatably connected to the front side of the outer wall of each of the multiple mounting plates (18).

8. The internal structure of the sound-absorbing and noise-reducing wall panel grille according to claim 2, characterized in that: The upper and lower sides of the left ends of the plurality of protrusions (201) are rounded, and the surfaces of the plurality of protrusions (201) are smoothed.

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