Low-resistance sound-attenuating enhanced composite glass fiber air pipe

Abstract

This utility model discloses a low-resistance, sound-absorbing, enhanced composite fiberglass duct, comprising a duct body and a sound-absorbing inner tube. The duct body includes, from the inside out, a porous aluminum plate layer, a first fiberglass cloth layer, a glass fiber layer, a second fiberglass cloth layer, and an outer protective color steel layer. The surface of the porous aluminum plate layer has multiple equidistantly distributed strip-shaped grooves, and ventilation holes are provided on the inner walls of both sides of the strip-shaped grooves. The sound-absorbing inner tube includes two pairs of upper supports, two pairs of lower supports, a first sound-absorbing aluminum tube, a fiberglass ring, and a second sound-absorbing aluminum tube. By setting the strip-shaped grooves and ventilation holes, the contact area between the airflow and the porous aluminum plate layer can be increased, allowing the glass fiber layer to better absorb sound waves. By setting the sound-absorbing inner tube, sound waves will contact the second and first sound-absorbing aluminum tubes from both the inside and outside sides respectively. Finally, the fiberglass ring can further reduce noise. This utility model effectively improves the sound absorption and noise reduction effect when the wind speed is high or the noise level is high.

Description

Technical Field

[0001] This utility model relates to the field of ventilation duct technology, specifically a low-resistance, noise-absorbing, enhanced composite fiberglass duct. Background Technology

[0002] Composite fiberglass ducts are ventilation duct systems made by combining composite materials with fiberglass reinforcement. These ducts consist of a multi-layered structure and are characterized by their light weight, high strength, corrosion resistance, and excellent fire resistance. They are widely used in ventilation systems in commercial buildings, industrial plants, hospitals, schools, and other locations. Furthermore, their superior thermal insulation properties reduce energy loss, achieving energy-saving and environmentally friendly effects.

[0003] Currently, most composite fiberglass ducts on the market have porous color steel plates for their inner walls. Sound absorption is achieved through the interaction of the porous steel plate and the fiberglass layer. Specifically, when sound waves enter the porous material, they propagate within the pores, causing vibrations in the air and the material itself. Due to friction and viscosity, the sound energy is gradually converted into heat energy, thus achieving sound absorption. However, when the airflow speed or noise level inside the duct is high, the sound absorption effect of existing composite fiberglass ducts is not ideal and therefore needs improvement. Utility Model Content

[0004] The purpose of this invention is to provide a low-resistance, sound-absorbing, enhanced composite fiberglass duct to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a low-resistance, sound-absorbing, enhanced composite fiberglass duct, comprising a duct body and a sound-absorbing inner tube, wherein the sound-absorbing inner tube is fixedly installed on the inner wall of the duct body, the duct body comprising a porous aluminum plate layer, a first fiberglass cloth layer, a glass fiber layer, a second fiberglass cloth layer and an outer protective color steel layer distributed from the inside out, and the porous aluminum plate layer, the first fiberglass cloth layer, the glass fiber layer, the second fiberglass cloth layer and the outer protective color steel layer are all bonded and fixed to each other, and the inner surface of the porous aluminum plate layer is provided with a plurality of equally spaced strip grooves around its perimeter, and the inner walls on both sides of the strip grooves are provided with ventilation holes; The silencing inner tube includes two pairs of upper supports, two pairs of lower supports, a first silencing aluminum tube, a fiberglass ring, and a second silencing aluminum tube. The two pairs of upper supports and two pairs of lower supports are respectively fixedly connected to the upper and lower surfaces of the first silencing aluminum tube. The two pairs of upper supports are fixedly connected to the upper inner wall of the porous aluminum plate layer, and the two pairs of lower supports are fixedly connected to the lower inner wall of the porous aluminum plate layer. The fiberglass ring is fixedly bonded to the inner wall of the first silencing aluminum tube, and the second silencing aluminum tube is fixedly bonded to the inner wall of the fiberglass ring.

[0006] Preferably, both the first and second silencing aluminum tubes have through holes on their surfaces.

[0007] Preferably, the inner wall of the second silencing aluminum tube is fixedly connected with a spiral guide rib.

[0008] Preferably, the duct body further includes a first flange and a second flange, which are fixedly connected to both ends of the duct body. A locking mechanism is fixedly connected around the first flange, and a mating plate that cooperates with the locking mechanism is fixedly connected around the second flange. A first sealing plate is fixedly connected to the surface of the first flange, and a second sealing plate is fixedly connected to the surface of the second flange.

[0009] Preferably, the locking mechanism includes a side support plate, a U-shaped rod, a base, two sleeves, two pins, two baffles, and two springs. The side support plate is fixedly connected to the surface of the first flange, the U-shaped rod is rotatably connected to the surface of the side support plate, the base is fixedly connected to the end of the U-shaped rod, the sleeve is fixedly connected to the surface of the base, the pins pass through the sleeves and the base, and the surface of the mating plate has a corresponding insertion hole for the pins. The baffles are fixedly connected to the outer surface of the pins, and the springs are sleeved on the outside of the pins.

[0010] Preferably, the ends of the two pins are jointly fixedly connected to a pull plate.

[0011] Preferably, the surface of the first sealing plate is provided with a spiral groove, and the surface of the second sealing plate is integrally formed with a spiral protrusion, and the spiral protrusion and the spiral groove can fit together and engage.

[0012] Beneficial effects This utility model provides a low-resistance, noise-absorbing, enhanced composite fiberglass duct, which has the following beneficial effects: 1. This low-resistance, sound-absorbing, enhanced composite fiberglass duct achieves initial noise reduction by incorporating a porous aluminum plate layer, a first fiberglass cloth layer, a glass fiber layer, a second fiberglass cloth layer, and an outer protective color steel layer. The addition of strip-shaped grooves and ventilation holes increases the contact area between the airflow and the porous aluminum plate layer, allowing the glass fiber layer to better absorb sound waves. The inclusion of an inner sound-absorbing tube ensures that sound waves contact the second and first sound-absorbing aluminum tubes from both the inner and outer sides. Finally, the glass fiber rings further reduce noise. This invention effectively improves noise reduction performance when wind speeds are high or noise levels are high.

[0013] 2. This low-resistance, noise-absorbing, enhanced composite fiberglass duct features a locking mechanism and a connecting plate. By rotating the boom and pulling the pull plate, the spring is compressed using the baffle, facilitating the alignment of the pin with the insertion hole. Releasing the pull plate allows the pin to be inserted into the insertion hole under the spring's elasticity, thus achieving relative fixation of the locking mechanism and the connecting plate. The four sets of locking mechanisms and four sets of connecting plates work together to enable rapid assembly and connection of multiple duct bodies, significantly improving installation efficiency compared to existing bolted connections.

[0014] 3. This low-resistance, sound-absorbing, enhanced composite fiberglass duct, by setting a first sealing plate, a second sealing plate, a U-shaped groove, and a U-shaped protrusion, utilizes the U-shaped protrusion and the U-shaped groove to fit together, which can make the connection between the first sealing plate and the second sealing plate tighter, effectively preventing leakage between two adjacent ducts. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall three-dimensional structure of a low-resistance, sound-absorbing, enhanced composite fiberglass duct proposed in this utility model. Figure 2 This is a rear-view three-dimensional structural diagram of a low-resistance, sound-absorbing, enhanced composite fiberglass duct proposed in this utility model. Figure 3 This is a cross-sectional view of the duct body of a low-resistance, sound-absorbing, enhanced composite fiberglass duct proposed in this utility model. Figure 4 This is a three-dimensional structural diagram of the sound-absorbing inner tube of a low-resistance sound-absorbing enhanced composite fiberglass duct proposed in this utility model. Figure 5 This utility model proposes a low-resistance, sound-absorbing, enhanced composite fiberglass duct. Figure 1 A schematic diagram of the enlarged structure of A in the middle; Figure 6 This is a cross-sectional view of the locking mechanism of a low-resistance, noise-absorbing, enhanced composite fiberglass duct proposed in this utility model.

[0016] In the diagram: 1. Duct body; 2. Inner silencing tube; 3. Perforated aluminum plate layer; 4. First fiberglass cloth layer; 5. Fiberglass layer; 6. Second fiberglass cloth layer; 7. Outer protective color steel layer; 8. Strip groove; 9. Ventilation hole; 10. Upper support; 11. Lower support; 12. First silencing aluminum tube; 13. Fiberglass ring; 14. Second silencing aluminum tube; 15. Spiral guide rib; 16. First flange; 17. Second flange; 18. Locking mechanism; 19. Connecting plate; 20. First sealing plate; 21. Second sealing plate; 22. Side support plate; 23. U-shaped rod; 24. Base; 25. Sleeve; 26. Pin; 27. Baffle; 28. Spring; 29. ​​Insertion hole; 30. Pull plate; 31. U-shaped groove; 32. U-shaped protrusion. 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] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0019] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0020] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0021] Example 1, please refer to Figure 1-6 This utility model provides a technical solution: a low-resistance, sound-absorbing, enhanced composite fiberglass duct, including a duct body 1 and a sound-absorbing inner tube 2. The sound-absorbing inner tube 2 is fixedly installed on the inner wall of the duct body 1. The duct body 1 includes a porous aluminum plate layer 3, a first fiberglass cloth layer 4, a glass fiber layer 5, a second fiberglass cloth layer 6, and an outer protective color steel layer 7 distributed from the inside out. The porous aluminum plate layer 3, the first fiberglass cloth layer 4, the glass fiber layer 5, the second fiberglass cloth layer 6, and the outer protective color steel layer 7 are all bonded and fixed to each other. The inner surface of the porous aluminum plate layer 3 is provided with a plurality of equally spaced strip grooves 8. The inner walls on both sides of the strip grooves 8 are provided with ventilation holes 9.

[0022] By setting the first fiberglass cloth layer 4 and the second fiberglass cloth layer 6, the adhesive bonding can be made stronger, thereby effectively preventing the fiberglass layer 5 from falling off; by setting the outer protective color steel layer 7, it can play a role in fire prevention, flame retardancy and isolation from external damage.

[0023] The silencing inner tube 2 includes two pairs of upper supports 10, two pairs of lower supports 11, a first silencing aluminum tube 12, a fiberglass ring 13, and a second silencing aluminum tube 14. The two pairs of upper supports 10 and the two pairs of lower supports 11 are respectively fixedly connected to the upper and lower surfaces of the first silencing aluminum tube 12. The two pairs of upper supports 10 are fixedly connected to the upper inner wall of the porous aluminum plate layer 3, and the two pairs of lower supports 11 are fixedly connected to the lower inner wall of the porous aluminum plate layer 3. The fiberglass ring 13 is fixedly bonded to the inner wall of the first silencing aluminum tube 12, and the second silencing aluminum tube 14 is fixedly bonded to the inner wall of the fiberglass ring 13.

[0024] By setting up a porous aluminum plate layer 3, a first fiberglass cloth layer 4, a fiberglass layer 5, a second fiberglass cloth layer 6, and an outer protective color steel layer 7, initial noise reduction can be achieved. By setting up a strip groove 8 and a vent hole 9, the contact area between the airflow and the porous aluminum plate layer 3 can be increased, allowing the fiberglass layer 5 to better absorb sound waves. By setting up a sound-absorbing inner tube 2, sound waves will contact the second sound-absorbing aluminum tube 14 and the first sound-absorbing aluminum tube 12 from the inner and outer sides respectively. Finally, the fiberglass ring 13 can further reduce noise. This utility model effectively improves the noise reduction effect when the wind speed is high or the noise is loud.

[0025] Both the first silencing aluminum tube 12 and the second silencing aluminum tube 14 have through holes on their surfaces. By setting through holes, sound waves can pass through the first silencing aluminum tube 12 and the second silencing aluminum tube 14 to contact the glass fiber ring 13, thereby achieving silencing.

[0026] The inner wall of the second silencing aluminum tube 14 is fixedly connected with a spiral guide 15. By setting the spiral guide 15, the airflow inside the second silencing aluminum tube 14 can be guided, which is conducive to the sound waves entering the through holes on the surface of the second silencing aluminum tube 14.

[0027] Example 2 includes Example 1, and based on Example 1, the present invention provides a technical solution: the duct body 1 further includes a first flange 16 and a second flange 17, the first flange 16 and the second flange 17 are respectively fixedly connected to both ends of the duct body 1, a locking mechanism 18 is fixedly connected around the first flange 16, a mating plate 19 that cooperates with the locking mechanism 18 is fixedly connected around the second flange 17, and a first sealing plate 20 is fixedly connected to the surface of the first flange 16 and a second sealing plate 21 is fixedly connected to the surface of the second flange 17.

[0028] The locking mechanism 18 includes a side support plate 22, a loop rod 23, a base 24, two sleeves 25, two pins 26, two baffles 27, and two springs 28. The side support plate 22 is fixedly connected to the surface of the first flange 16. The loop rod 23 is rotatably connected to the surface of the side support plate 22. The base 24 is fixedly connected to the end of the loop rod 23. The sleeves 25 are fixedly connected to the surface of the base 24. The pins 26 pass through the sleeves 25 and the base 24. The surface of the mating plate 19 is provided with insertion holes 29 corresponding to the pins 26. The baffles 27 are fixedly connected to the outer surface of the pins 26. The springs 28 are sleeved on the outside of the pins 26. The ends of the pins 26 are fixedly connected to a pull plate 30. By setting the pull plate 30, the two pins 26 can be pulled at the same time.

[0029] By setting up locking mechanism 18 and docking plate 19, rotating the boom 23 and pulling the pull plate 30, the baffle 27 presses the spring 28, which can compress the spring 28, thus facilitating the alignment of the pin 26 with the socket 29. After releasing the pull plate 30, the pin 26 can be inserted into the socket 29 under the elastic force of the spring 28, thereby achieving relative fixation of locking mechanism 18 and docking plate 19. The four sets of locking mechanisms 18 and four sets of docking plates 19 cooperate with each other to achieve rapid combination and connection of multiple air duct bodies 1, which greatly improves the installation efficiency compared with the existing technology that uses bolt connection.

[0030] The surface of the first sealing plate 20 is provided with a spiral groove 31, and the surface of the second sealing plate 21 is integrally formed with a spiral protrusion 32, and the spiral protrusion 32 and the spiral groove 31 can fit together and engage.

[0031] By setting a first sealing plate 20, a second sealing plate 21, a U-shaped groove 31, and a U-shaped protrusion 32, the U-shaped protrusion 32 and the U-shaped groove 31 can fit together and engage with each other, making the connection between the first sealing plate 20 and the second sealing plate 21 tighter and effectively preventing leakage between two adjacent air ducts.

[0032] The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other. Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. 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. A low-resistance, sound-absorbing, enhanced composite fiberglass duct, comprising a duct body (1) and a sound-absorbing inner duct (2), characterized in that: The sound-absorbing inner tube (2) is fixedly installed on the inner wall of the duct body (1). The duct body (1) includes a porous aluminum plate layer (3), a first fiberglass cloth layer (4), a glass fiber layer (5), a second fiberglass cloth layer (6), and an outer protective color steel layer (7) distributed from the inside to the outside. The porous aluminum plate layer (3), the first fiberglass cloth layer (4), the glass fiber layer (5), the second fiberglass cloth layer (6), and the outer protective color steel layer (7) are all bonded and fixed to each other. The inner surface of the porous aluminum plate layer (3) is provided with multiple equally spaced strip grooves (8). The inner walls on both sides of the strip grooves (8) are provided with ventilation holes (9). The silencing inner tube (2) includes two pairs of upper supports (10), two pairs of lower supports (11), a first silencing aluminum tube (12), a fiberglass ring (13), and a second silencing aluminum tube (14). The two pairs of upper supports (10) and the two pairs of lower supports (11) are respectively fixedly connected to the upper and lower surfaces of the first silencing aluminum tube (12). The two pairs of upper supports (10) are fixedly connected to the upper inner wall of the porous aluminum plate layer (3), and the two pairs of lower supports (11) are fixedly connected to the lower inner wall of the porous aluminum plate layer (3). The fiberglass ring (13) is fixedly bonded to the inner wall of the first silencing aluminum tube (12), and the second silencing aluminum tube (14) is fixedly bonded to the inner wall of the fiberglass ring (13).

2. The low-resistance, sound-absorbing, enhanced composite fiberglass duct according to claim 1, characterized in that: Both the first silencing aluminum tube (12) and the second silencing aluminum tube (14) have through holes on their surfaces.

3. The low-resistance, sound-absorbing, enhanced composite fiberglass duct according to claim 2, characterized in that: The inner wall of the second silencing aluminum tube (14) is fixedly connected with a spiral guide rib (15).

4. The low-resistance, sound-absorbing, enhanced composite fiberglass duct according to claim 1, characterized in that: The duct body (1) also includes a first flange (16) and a second flange (17). The first flange (16) and the second flange (17) are respectively fixedly connected to both ends of the duct body (1). A locking mechanism (18) is fixedly connected around the first flange (16). A mating plate (19) that cooperates with the locking mechanism (18) is fixedly connected around the second flange (17). A first sealing plate (20) is fixedly connected to the surface of the first flange (16), and a second sealing plate (21) is fixedly connected to the surface of the second flange (17).

5. The low-resistance, sound-absorbing, enhanced composite fiberglass duct according to claim 4, characterized in that: The locking mechanism (18) includes a side support plate (22), a spiral rod (23), a base (24), two sleeves (25), two pins (26), two baffles (27), and two springs (28). The side support plate (22) is fixedly connected to the surface of the first flange (16). The spiral rod (23) is rotatably connected to the surface of the side support plate (22). The base (24) is fixedly connected to the end of the spiral rod (23). The sleeve (25) is fixedly connected to the surface of the base (24). The pin (26) passes through the sleeve (25) and the base (24). The surface of the mating plate (19) is provided with a corresponding insertion hole (29) for the pin (26). The baffle (27) is fixedly connected to the outer surface of the pin (26). The spring (28) is sleeved on the outside of the pin (26).

6. The low-resistance, sound-absorbing, enhanced composite fiberglass duct according to claim 5, characterized in that: The ends of the two pins (26) are fixedly connected to a pull plate (30).

7. The low-resistance, sound-absorbing, enhanced composite fiberglass duct according to claim 4, characterized in that: The surface of the first sealing plate (20) is provided with a spiral groove (31), and the surface of the second sealing plate (21) is integrally formed with a spiral protrusion (32), and the spiral protrusion (32) and the spiral groove (31) can fit and engage with each other.

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