High-damping layer shock-absorbing low-noise ventilation duct

Abstract

The utility model discloses a kind of high-damping layer shock-absorbing low-noise ventilation duct, it relates to ventilation duct field, its technical solution main point is including first sealing plate, duct side plate and second sealing plate, the first sealing plate, duct side plate and second sealing plate are inserted after being fixed by screw, polyurethane connecting column is arranged in the inside of duct side plate, mounting strip is installed in the screw of polyurethane connecting column penetrating end, the second sealing plate side is equipped with uniformly distributed through-hole, the inner wall of duct side plate is equipped with sliding slot, sliding slot is symmetrically arranged about the middle part of duct side plate, several are equipped with in the height direction of duct side plate, the wave plate is slidably connected in the inside of two symmetrically arranged sliding slots, soundproofing cotton is filled between wave plate in upper and lower positions, reach the effect of convenient disassembly, high-efficiency noise reduction, and overall structure rigidity reduces, improve the effect of damping release energy effect.

Description

Technical Field

[0001] This utility model relates to the technical field of ventilation ducts, specifically a high-damping layer vibration-damping and low-noise ventilation duct. Background Technology

[0002] Ventilation ducts are commonly used ventilation devices in modern buildings. To ensure fresh air enters the building, one end of the duct usually needs to be located in a noisy area outside the building. How to effectively reduce or eliminate noise entering the building from this noisy area along the ventilation duct while guaranteeing sufficient ventilation has become an urgent problem to solve.

[0003] In existing technologies, noise reduction techniques applicable to ventilation ducts are mainly divided into passive noise reduction and active noise reduction. Passive noise reduction primarily involves designing the ventilation ducts as complex, narrow pipes with multiple bends, and laying sound-absorbing materials inside the ducts, or installing sound-absorbing baffles or cavities within the ducts, to reduce noise. The disadvantages of passive noise reduction are that the noise reduction devices are relatively large, and the bends and complexity of the ducts result in significant ventilation resistance.

[0004] Active noise cancellation (ADC) technology works by utilizing the principle of sound interference. A secondary sound source is used, emitting a sound wave with the same sound pressure level but opposite phase to the initial noise signal. The superposition of these sound waves cancels each other out, thus reducing noise. The advantages of ADC devices include smaller size, a wider noise reduction bandwidth, and good noise reduction even at low frequencies. Furthermore, the introduction of a circuit control module allows for more precise control of the secondary sound source, significantly improving noise reduction compared to passive noise cancellation. However, ADC requires the installation of multiple circuit modules, increasing its cost. Utility Model Content

[0005] The purpose of this invention is to provide a high-damping layer vibration-damping and low-noise ventilation duct that is easy to assemble and disassemble, efficiently reduces noise, and has reduced overall structural rigidity, thereby improving the damping and energy release effect.

[0006] To achieve the above objectives, the present invention provides the following technical solution: The system includes a first sealing plate, a duct side plate, and a second sealing plate. These three components are inserted together and fixed with screws. A polyurethane connecting column is inserted inside the duct side plate, and an installation strip is screwed onto the protruding end of the polyurethane connecting column. The second sealing plate has evenly distributed through holes on its side. The inner wall of the duct side plate has a sliding groove, which is symmetrically arranged about the middle of the duct side plate. Several sliding grooves are arranged along the height direction of the duct side plate. A corrugated plate is slidably connected inside two symmetrically arranged sliding grooves, and sound insulation cotton is filled between the upper and lower corrugated plates.

[0007] Furthermore, threaded posts are fixed to the side of the first sealing plate, and four threaded posts are provided at the four corners of the first sealing plate.

[0008] The above technical solution adopts a plug-in and screw connection installation method, which is easy to disassemble and facilitates later maintenance and replacement.

[0009] Furthermore, the side plate of the duct is provided with a plug hole, which corresponds to the position of the threaded post.

[0010] Furthermore, the second sealing plate is provided with a recessed hole, and a fastening screw is placed inside the recessed hole to fix the threaded connection of the threaded post.

[0011] Using the above technical solution, the second sealing plate and the first sealing plate are connected by plug-in and screws, which facilitates disassembly and makes it convenient for later maintenance and replacement.

[0012] Furthermore, the corrugated plate is provided with a through groove for the polyurethane connecting post to pass through.

[0013] The above technical solution facilitates disassembly and makes subsequent maintenance and replacement easier.

[0014] In summary, the beneficial technical effects of this utility model are as follows: 1. It adopts threaded posts and uses plug-in and screw connection for installation, which is easy to disassemble and facilitates later maintenance and replacement.

[0015] 2. Polyurethane connecting columns are used. The connecting strip extends through the polyurethane connecting column. After installation, when the whole structure shakes, the strip acts on the side of the highly elastic polyurethane connecting column, reducing the rigidity of the overall structure and protecting the overall structure.

[0016] 3. A corrugated board is used, and through holes are set on the second sealing board to facilitate the entry of noise. Combined with the sound insulation cotton filled inside, the noise reduction effect is improved. At the same time, the corrugated board can increase the number of sound reflections, further improving the sound absorption and noise reduction effect. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present invention and form part of the specification, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a structural schematic diagram of a high-damping layer vibration-damping and low-noise ventilation duct provided in this embodiment; Figure 2 This is a schematic diagram of the exploded structure of a high-damping layer vibration-damping and low-noise ventilation duct provided in this embodiment.

[0018] In the diagram, 1 is the first sealing plate; 2 is the duct side plate; 3 is the second sealing plate; 4 is the polyurethane connecting column; 5 is the mounting strip; 6 is the through hole; 7 is the slide groove; 8 is the corrugated plate; 9 is the threaded column; 10 is the insertion hole; 11 is the countersunk hole; 12 is the fastening screw; and 13 is the through groove. Detailed Implementation

[0019] The present invention will be further described in detail below with reference to the accompanying drawings.

[0020] 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.

[0021] Please see Figure 1-2 The present invention provides a technical solution comprising a first sealing plate 1, a duct side plate 2, and a second sealing plate 3. The first sealing plate 1, the duct side plate 2, and the second sealing plate 3 are inserted together and fixed by screws. A polyurethane connecting post 4 is inserted inside the duct side plate 2, and an installation strip 5 is screwed onto the protruding end of the polyurethane connecting post 4. The second sealing plate 3 has evenly distributed through holes 6 on its side. The inner wall of the duct side plate 2 is provided with a sliding groove 7, which is symmetrically arranged about the middle of the duct side plate 2. Several sliding grooves 7 are arranged along the height direction of the duct side plate 2. A corrugated plate 8 is slidably connected inside two symmetrically arranged sliding grooves 7, and sound insulation cotton is filled between the upper and lower corrugated plates 8.

[0022] In this embodiment, the mounting strip 5 is used for fixed installation, and the mounting strip 5 may be provided with through holes in multiple locations for screws to pass through.

[0023] The first sealing plate 1 has a threaded post 9 fixed on its side. The threaded post 9 is set at the four corners of the first sealing plate 1, and there are four in total. The duct side plate 2 has a plug hole 10, which corresponds to the position of the threaded post 9. The second sealing plate 3 has a recessed hole 11, and a fastening screw 12 is placed inside the recessed hole 11. The fastening screw 12 fixes the threaded post 9 for threaded connection. The corrugated plate 8 has a through groove 13, which allows the polyurethane connecting post 4 to pass through.

[0024] In this embodiment, sound-absorbing cotton is placed between the first sealing plate 1 and the second sealing plate 3 for sound absorption and noise reduction. Meanwhile, multiple through holes 6 are provided on the second sealing plate 3 to facilitate noise entry, thereby improving the noise reduction effect. Furthermore, the partition wall provided in this embodiment is installed in an assembled manner.

[0025] Specifically, first, insert the duct side plate 2 into the threaded post 9 on the first sealing plate 1, then insert the corrugated plate 8 along the groove 7 on the inner wall of the duct side plate 2, and pass the polyurethane connecting post 4 through the through groove 13 on the corrugated plate 8. After passing through, screw it into the mounting strip 5. Finally, fill the gap between the corrugated plates 8 with sound-absorbing cotton. After filling, lock and fix the second sealing plate 3 and the threaded post 9 with fastening screws 12.

[0026] The working principle of this utility model is as follows: The existing air duct is connected to both sides of the first sealing plate 1 and the second sealing plate 3. The structure of the first sealing plate 1 and the second sealing plate 3 is installed in the middle of the existing air duct. Multiple such structures can be installed in a cyclic manner. The two ends of the structure extend through the through polyurethane connecting columns 4 and the connecting installation strips 5. After installation, when the whole structure shakes, it acts on the side of the highly elastic polyurethane connecting columns 4, reducing the rigidity of the overall structure and protecting the overall structure.

[0027] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0028] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the 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 this utility model should be included within the protection scope of this utility model.

Claims

1. A high-damping layer vibration-damping and low-noise ventilation duct, characterized in that, The system includes a first sealing plate (1), a duct side plate (2), and a second sealing plate (3). The first sealing plate (1), the duct side plate (2), and the second sealing plate (3) are connected by screws. A polyurethane connecting column (4) is inserted inside the duct side plate (2). An installation strip (5) is installed on the screw at the end of the polyurethane connecting column (4). The second sealing plate (3) has evenly distributed through holes (6) on its side. The inner wall of the duct side plate (2) is provided with a sliding groove (7). The sliding groove (7) is symmetrically arranged about the middle of the duct side plate (2). Several sliding grooves (7) are arranged along the height direction of the duct side plate (2). A corrugated plate (8) is slidably connected inside two symmetrically arranged sliding grooves (7). Sound insulation cotton is filled between the upper and lower corrugated plates (8).

2. The high-damping layer vibration-damping and low-noise ventilation duct according to claim 1, characterized in that, The first sealing plate (1) has threaded posts (9) fixed on its side. The threaded posts (9) are set at the four corners of the first sealing plate (1), and there are a total of four.

3. The high-damping layer vibration-damping and low-noise ventilation duct according to claim 2, characterized in that, The side plate (2) of the air duct is provided with a plug hole (10), and the plug hole (10) corresponds to the position of the threaded post (9).

4. The high-damping layer vibration-damping and low-noise ventilation duct according to claim 2, characterized in that, The second sealing plate (3) is provided with a recessed hole (11), and a fastening screw (12) is placed inside the recessed hole (11). The fastening screw (12) fixes the threaded post (9) for threaded connection.

5. The high-damping layer vibration-damping and low-noise ventilation duct according to claim 1, characterized in that, The corrugated plate (8) is provided with a through groove (13) through which the polyurethane connecting column (4) passes.

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