A cellular composite muffler

Abstract

The utility model discloses a honeycomb type composite silencer relates to the field of noise prevention, including floor, the floor below is connected with keel subassembly, the keel subassembly below is connected with a plurality of groups of furred ceiling subassembly. The utility model discloses through setting furred ceiling subassembly, sound wave first hits to aluminium plate layer, this compact layer will most sound energy reflect and primarily consume, the part of not being reflected penetrates into aluminium plate layer inside, and aluminium plate layer, adhesive layer, honeycomb core layer, coating and rolling layer and backboard jointly constitute an efficient damping system, and after sound wave penetrates aluminium plate layer, enters the high damping environment provided by adhesive layer and coating and rolling layer, and mechanical vibration energy is converted into heat energy consumption here by a large margin, then, sound wave contacts honeycomb core layer, and its regular cavity structure not only provides rigid support, more forms multiple parallel resonant cavities, and produces selective absorption to the sound wave of specific frequency, finally, residual sound wave reaches backboard place, and then is further isolated.

Description

Technical Field

[0001] This utility model relates to the field of noise control technology, and in particular to a honeycomb composite silencer. Background Technology

[0002] In modern indoor acoustic control, integrated ceiling systems are widely used in various architectural spaces such as office buildings, hospitals, and classrooms. They are not only important architectural components for dividing interior spaces and concealing pipelines and equipment, but the area above them often becomes a hidden cavity channel connecting different rooms. Although the ceiling panels themselves have a certain sound insulation capability, structural sound and airborne sound can still propagate through the cavities inside the ceiling, causing noise interference between adjacent rooms. This is especially true for mid-to-high frequency sounds such as speech and equipment operation; this "lateral transmission" or "crosstalk" phenomenon through the ceiling significantly reduces the privacy and quietness of the space.

[0003] A search revealed a utility model patent with authorization announcement number CN213654379U, entitled "A High-Sound-Insulation Equipment Room," belonging to the field of noise control technology. It includes a wall sound insulation component and a sound-absorbing ceiling. The wall sound insulation component is installed on the surface of the wall and includes a fireproof layer, a sponge sound insulation layer, and a damping sound insulation board. A fireproof layer is located on the right side of the wall. This utility model can quickly reflect the noise energy generated by indoor noise pollution sources upwards to the sound-absorbing board through the damping sound insulation board. The sound-absorbing hole resonant cavity structure inside the sound-absorbing board significantly reduces and absorbs noise energy, achieving a high sound insulation effect.

[0004] However, the main function of the ceiling in the prior art is to passively absorb sound waves reflected from the wall. It is a relatively simple acoustic functional layer structure of ceiling + sound-absorbing panel. This structure has a single function, and it is difficult to balance mechanical and acoustic performance. The overall performance, reliability and applicability of the ceiling system are limited. In view of this, this application proposes a honeycomb composite silencer based on the above technical problems. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings of the existing technology and propose a honeycomb composite silencer.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A honeycomb composite silencer includes a floor slab, a keel assembly connected below the floor slab, and a plurality of ceiling assemblies connected below the keel assembly; The ceiling assembly includes a frame, and the interior of the frame is provided with an aluminum plate layer, an adhesive layer, a honeycomb core layer, a coating layer, and a back panel from bottom to top. The coating material is a fire-resistant damping material, and the backing material is a cement fiberboard. A sound insulation component is provided between the keel assembly and the floor slab, and a locking component is provided between the ceiling assemblies.

[0007] Furthermore, the sound insulation component includes a sound insulation felt, which is fixedly connected to the floor slab by steel nails.

[0008] Furthermore, the keel assembly includes a main keel and a secondary keel. The main keel is provided with a hook groove, and the secondary keel is provided with a groove. The secondary keel is slidably installed between two adjacent hook grooves through the groove. A long screw is fixedly installed between the main keel and the secondary keel. The floor slab is fixedly installed with a threaded rod by expansion bolts. The main keel is fixedly connected to the floor slab by the threaded rod.

[0009] Furthermore, the sound insulation component also includes glass wool, which is located between the sound insulation felt and the main keel, and the glass wool is fixedly connected to the sound insulation felt.

[0010] Furthermore, the locking assembly includes a male card fixedly installed on one of the frames and a female card fixedly installed on the other frame. The top of the male card is fixedly provided with a first arc-shaped portion, and the female card is fixedly provided with a second arc-shaped portion. The male card is locked into the second arc-shaped portion through the first arc-shaped portion and fixedly connected to the female card.

[0011] Furthermore, the spaces between the aluminum plate layers are filled with sealant.

[0012] Furthermore, a rubber sleeve is fitted at the connection between the all-wire hanger and the main keel.

[0013] Furthermore, the honeycomb cells of the honeycomb core layer are filled with centrifugal glass wool felt.

[0014] The beneficial effects of this utility model are as follows: 1. This utility model, by setting up a ceiling assembly, allows sound energy to propagate in both airborne and structural forms when a noise source in the equipment room generates sound waves. For airborne sound, the sound waves first impact the aluminum plate layer, which reflects and initially dissipates most of the sound energy. The unreflected portion penetrates into the interior of the aluminum plate layer. The aluminum plate layer, adhesive layer, honeycomb core layer, coating layer, and back panel together constitute a highly efficient damping system. After penetrating the aluminum plate layer, the sound waves enter the high-damping environment provided by the adhesive layer and coating layer, where mechanical vibration energy is largely converted into heat energy. Next, the sound waves contact the honeycomb core layer, whose regular cavity structure not only provides rigid support but also forms multiple parallel resonant cavities, selectively absorbing sound waves of specific frequencies. Finally, the residual sound waves reach the back panel and are further isolated.

[0015] 2. By setting up sound insulation felt and glass wool, the sound insulation felt and glass wool first absorb and attenuate structural sound that attempts to be transmitted through the floor slab. At the same time, the rubber sleeve on the all-silk hanger effectively cuts off the sound bridge, preventing vibration from being transmitted to the floor slab through the main keel, thus avoiding any impact on the residents upstairs.

[0016] 3. By setting up a honeycomb core layer and centrifugal glass wool felt, when the sound waves enter the pores of the honeycomb core layer, they will force the air inside the pores to vibrate violently. Due to the huge viscous resistance and frictional effect between the air and the glass fibers of the extremely fine centrifugal glass wool felt, the mechanical energy of the sound waves will be continuously converted into heat energy and dissipated. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a honeycomb composite silencer proposed in this utility model. Figure 2 This is a schematic diagram of a ceiling assembly for a honeycomb composite silencer proposed in this utility model; Figure 3 This is a front view schematic diagram of a honeycomb composite silencer proposed in this utility model; Figure 4 This utility model proposes a honeycomb composite silencer. Figure 3 Enlarged view of a portion of point A in the middle; Figure 5 This is a schematic diagram of the keel assembly of a honeycomb composite silencer proposed in this utility model; Figure 6 This is a schematic diagram of the sound insulation felt for a honeycomb composite silencer proposed in this utility model; Figure 7 This is a schematic diagram of the honeycomb core layer of a honeycomb composite silencer proposed in this utility model.

[0018] In the diagram: 1. Floor slab; 2. Keel assembly; 3. Frame; 4. Aluminum plate layer; 5. Adhesive layer; 6. Honeycomb core layer; 7. Coating layer; 8. Back panel; 9. Ceiling assembly; 10. Sound insulation felt; 11. Main keel; 12. Secondary keel; 13. Hook groove; 14. Groove; 15. Long screw; 16. Threaded rod; 17. Glass wool; 18. Male clip; 19. Female clip; 20. First arc-shaped part; 21. Second arc-shaped part; 22. Sealant; 23. Rubber sleeve; 24. Centrifugal glass wool felt. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] Reference Figure 1-2 , Figure 7 A honeycomb composite silencer includes a floor slab 1, a keel assembly 2 connected below the floor slab 1, and a plurality of ceiling assemblies 9 connected below the keel assembly 2; The ceiling assembly 9 includes a frame 3, and inside the frame 3, from bottom to top, there are aluminum plate layer 4, adhesive layer 5, honeycomb core layer 6, coating layer 7, and back panel 8. When a noise source in the equipment room generates sound waves, the sound energy propagates in two forms: airborne sound and structural sound. For airborne sound, the sound waves first strike the aluminum plate layer 4. This dense layer reflects and initially dissipates most of the sound energy, while the unreflected portion penetrates into the interior of the aluminum plate layer 4. The aluminum plate layer 4, adhesive layer 5, honeycomb core layer 6, coating layer 7, and back plate 8 together constitute a highly efficient damping system. After penetrating the aluminum plate layer 4, the sound waves enter the high-damping environment provided by the adhesive layer 5 and coating layer 7, where mechanical vibration energy is largely converted into heat energy and dissipated. Next, the sound waves contact the honeycomb core layer 6, whose regular cavity structure not only provides rigid support but also forms multiple parallel resonant cavities, selectively absorbing sound waves of specific frequencies. Finally, the residual sound waves reach the back plate 8 and are further isolated. The coating layer 7 is made of fire-resistant damping material, and the back plate 8 is made of cement fiberboard. A sound insulation component is provided between the keel assembly 2 and the floor slab 1, and a locking component is provided between the ceiling assemblies 9.

[0021] Reference Figure 3 , Figure 6 Specifically: the sound insulation component includes a sound insulation felt 10, which is fixedly connected to the floor slab 1 by steel nails. For structural sound transmission that attempts to be transmitted through the floor slab 1, the sound insulation felt 10 absorbs and attenuates it.

[0022] Reference Figure 3 , Figure 5 Specifically: the keel assembly 2 includes a main keel 11 and a secondary keel 12. The main keel 11 is provided with a hook groove 13, and the secondary keel 12 is provided with a groove 14. The secondary keel 12 is slidably installed between two adjacent hook grooves 13 through the groove 14. A long screw 15 is fixedly installed between the main keel 11 and the secondary keel 12. The floor slab 1 is fixedly installed with a threaded rod 16 by expansion bolts. The main keel 11 is fixedly connected to the floor slab 1 by the threaded rod 16. During installation, the device is first installed with expansion bolts to install the threaded rod 16, and then the sound insulation felt 10 is fixed to the lower surface of the floor slab 1 with an air gun and steel nails. Then, the keel assembly 2 is assembled, and the secondary keel 12 can be inserted into the hook groove 13 of the main keel 11 and then fixed with long screws 15. Next, glass wool 17 is filled between the sound insulation felt 10 and the keel assembly 2, and finally the ceiling assembly 9 is installed.

[0023] Reference Figure 1 , Figure 6 Specifically: the sound insulation component also includes glass wool 17, which is located between the sound insulation felt 10 and the main keel 11. The glass wool 17 is fixedly connected to the sound insulation felt 10, and the glass wool 17 further absorbs and attenuates the structural sound transmitted by the floor slab 1.

[0024] Reference Figure 3-4 Specifically: the engaging assembly includes a male card 18 fixedly installed on one of the frames 3 and a female card 19 fixedly installed on the other frame 3. The top of the male card 18 is fixedly provided with a first arc-shaped part 20, and the female card 19 is fixedly provided with a second arc-shaped part 21. The male card 18 is engaged with the female card 19 through the first arc-shaped part 20 and inserted into the second arc-shaped part 21. The frames 3 can quickly engage and connect with the female card 19 by means of the male card 18 and the female card 19.

[0025] Reference Figure 4 Specifically: the aluminum plate layers 4 are filled with sealant 22.

[0026] Reference Figure 5 Specifically: a rubber sleeve 23 is provided at the connection between the all-thread hanger 16 and the main keel 11. The rubber sleeve 23 on the all-thread hanger 16 effectively cuts off the sound bridge and prevents vibration from being transmitted to the floor slab 1 through the main keel 11, thus avoiding any impact on the residents upstairs.

[0027] Reference Figure 2 , Figure 7 Specifically: the honeycomb core layer 6 is filled with centrifugal glass wool felt 24. When the sound wave enters the honeycomb core layer 6, it will force the air in the cell to vibrate violently. Due to the huge viscous resistance and friction effect between the air and the glass fibers of the extremely fine centrifugal glass wool felt 24, the mechanical energy of the sound wave will be continuously converted into heat energy and dissipated.

[0028] Working principle: When a noise source in the equipment room generates sound waves, the sound energy propagates in two forms: airborne sound and structural sound. For airborne sound, the sound waves first strike the aluminum plate layer 4. This dense layer reflects and initially dissipates most of the sound energy, while the unreflected portion penetrates into the interior of the aluminum plate layer 4. The aluminum plate layer 4, adhesive layer 5, honeycomb core layer 6, coating layer 7, and back plate 8 together constitute a highly efficient damping system. After penetrating the aluminum plate layer 4, the sound waves enter the high-damping environment provided by the adhesive layer 5 and coating layer 7, where mechanical vibration energy is largely converted into heat energy and dissipated. Next, the sound waves contact the honeycomb core layer 6, whose regular cavity structure not only provides rigid support but also forms multiple parallel resonant cavities, selectively absorbing sound waves of specific frequencies. Finally, the residual sound waves reach the back plate 8 and are further isolated. For structural sound transmission that attempts to be transmitted through floor slab 1, sound insulation felt 10 and glass wool 17 first absorb and attenuate it. At the same time, the rubber sleeve 23 on the all-silk hanger 16 effectively cuts off the sound bridge, preventing vibration from being transmitted to floor slab 1 through the main keel 11, thus avoiding the impact on upstairs residents. The sealant 22 at the joint of the aluminum plate layer 4 together ensures the airtightness of the entire ceiling plane and eliminates the shortcoming of sound leakage through the gaps. When sound waves enter the pores of the honeycomb core layer 6, they force the air inside the pores to vibrate violently. Due to the huge viscous resistance and frictional effect between the air and the glass fibers of the extremely fine centrifugal glass wool felt 24, the mechanical energy of the sound waves will be continuously converted into heat energy and dissipated. Therefore, this silencer does not passively absorb reflected sound energy, but actively blocks, consumes, absorbs and converts broadband noise through its composite structure, achieving all-round, high-performance noise control from the sound source to the propagation path, thus achieving excellent comprehensive noise reduction effect while ensuring structural strength and safety. During installation, the device is pre-installed with expansion bolts to install the threaded rods 16, and then the sound insulation felt 10 is fixed to the lower surface of the floor slab 1 with an air gun and steel nails. Then, the keel assembly 2 is assembled, and the secondary keel 12 can be inserted into the hook groove 13 of the main keel 11 and then fixed with long screws 15. Next, glass wool 17 is filled between the sound insulation felt 10 and the keel assembly 2. Finally, the ceiling assembly 9 is installed. The frames 3 between the ceiling assemblies 9 are quickly connected by male clips 18 and female clips 19, and sealant 22 is filled at the joint of the aluminum plate layer 4.

[0029] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

[0030] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

Claims

1. A honeycomb composite silencer, characterized in that, Includes a floor slab (1), with a keel assembly (2) connected below the floor slab (1), and several sets of ceiling assemblies (9) connected below the keel assembly (2); The ceiling assembly (9) includes a frame (3), and the frame (3) is provided with an aluminum plate layer (4), an adhesive layer (5), a honeycomb core layer (6), a coating layer (7), and a back panel (8) from bottom to top. The coating layer (7) is made of fire-resistant damping material, and the back plate (8) is made of cement fiberboard. A sound insulation component is provided between the keel assembly (2) and the floor slab (1), and a locking component is provided between the ceiling assemblies (9).

2. The honeycomb composite silencer according to claim 1, characterized in that, The sound insulation component includes a sound insulation felt (10), which is fixedly connected to the floor slab (1) by steel nails.

3. The honeycomb composite silencer according to claim 1, characterized in that, The keel assembly (2) includes a main keel (11) and a secondary keel (12). The main keel (11) is provided with a hook groove (13), and the secondary keel (12) is provided with a groove (14). The secondary keel (12) is slidably installed between two adjacent hook grooves (13) through the groove (14). A long screw (15) is fixedly installed between the main keel (11) and the secondary keel (12). The floor slab (1) is fixedly installed with a threaded rod (16) by expansion bolts. The main keel (11) is fixedly connected to the floor slab (1) by the threaded rod (16).

4. A honeycomb composite silencer according to claim 1, characterized in that, The sound insulation component also includes glass wool (17), which is located between the sound insulation felt (10) and the main keel (11), and the glass wool (17) is fixedly connected to the sound insulation felt (10).

5. A honeycomb composite silencer according to claim 1, characterized in that, The locking assembly includes a male card (18) fixedly installed on one of the frames (3) and a female card (19) fixedly installed on the other frame (3). The top of the male card (18) is fixedly provided with a first arc-shaped part (20), and the female card (19) is fixedly provided with a second arc-shaped part (21). The male card (18) is inserted into the second arc-shaped part (21) through the first arc-shaped part (20) and fixedly connected to the female card (19).

6. A honeycomb composite silencer according to claim 1, characterized in that, The aluminum plate layers (4) are filled with sealant (22).

7. A honeycomb composite silencer according to claim 3, characterized in that, A rubber sleeve (23) is fitted at the connection between the full-wire hanger (16) and the main keel (11).

8. A honeycomb composite silencer according to claim 1, characterized in that, The honeycomb core layer (6) is filled with centrifugal glass wool felt (24) in the honeycomb cells.

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