Noise reduction structure of air outlet pipeline

Abstract

An air outlet pipeline noise reduction structure comprises noise reduction units arranged on all faces of a rectangular pipeline, every two adjacent noise reduction units located on the same face are connected through a connecting piece, energy transmitted outwards by noise in the rectangular pipeline can be reduced through the arranged noise reduction units, and therefore the purpose of noise reduction is improved. The noise reduction unit comprises a rectangular plate, a rectangular groove is formed in the rectangular plate, an opening is formed in one side of the rectangular plate, a convex ring is formed on the periphery of the opening side of the rectangular groove, and a cover plate is fixed to the opening side of the rectangular plate in a sealed mode and located in the convex ring. The rectangular grooves provide cavities for the noise reduction units, in the specific application process, the sound insulation effect of the noise reduction units can be improved by vacuumizing the cavities, and in addition, the cavities can be filled with liquid so that the noise reduction effect can be improved.

Description

Technical Field

[0001] This utility model relates to the field of noise reduction and sound insulation technology, and in particular to a noise reduction structure for an air outlet duct. Background Technology

[0002] Factories often install ventilation systems to replace air within the factory premises and ensure a safe working environment. However, the ductwork used in these systems generates considerable noise during ventilation. If this noise is not soundproofed, it will negatively impact the factory's working environment. Currently, noise reduction for these ducts is achieved by wrapping them with a layer of sound-absorbing cotton. This method has limited effectiveness and is prone to aging. Therefore, improving the sound insulation of these ductwork systems is a pressing issue that needs to be addressed. Utility Model Content

[0003] This utility model provides a noise reduction structure for air outlet ducts to overcome the shortcomings of the prior art and solve the problem of poor noise reduction effect of air outlet ducts, etc., and has strong practicality.

[0004] In order to achieve the purpose of this utility model, the following technology is proposed to be adopted:

[0005] A noise reduction structure for an air outlet duct includes noise reduction units arranged on each face of a rectangular duct. Two adjacent noise reduction units located on the same face are connected by connectors. The noise reduction units can reduce the energy of noise transmitted outward from the rectangular duct, thereby improving the noise reduction effect.

[0006] The noise reduction unit includes a rectangular plate with a rectangular groove and an opening on one side. A raised ring is formed on the outer periphery of the opening side of the rectangular groove. A cover plate is sealed and fixed to the opening side of the rectangular plate, and the cover plate is located inside the raised ring. The rectangular groove provides a cavity for the noise reduction unit. In specific applications, the sound insulation effect of the noise reduction unit can be improved by evacuating the cavity. Alternatively, liquid can be filled into the cavity to enhance the noise reduction effect.

[0007] A through hole is formed on the rectangular plate. An inner tube is formed on the inner end of the through hole. An outer conical tube is formed on the inner end of the inner tube. The inner end of the outer conical tube is the smaller end. A through hole is formed on the inner end of the inner tube. An inner tube is connected to the through hole by a thread. A through tube is inserted inside the inner tube. A movable tube is formed on the inner end of the through tube. The outer diameter of the movable tube is larger than the outer diameter of the inner tube. An inner cone is formed on the inner end of the movable tube. The inner end of the inner cone is the smaller end. The outer circumference of the inner cone contacts the inner wall of the outer conical tube. A vent hole is formed on the outer circumference of the inner cone. An inner extension column is inserted on the outer end of the through tube. A sealing cap is provided on the outer end of the inner extension column. The sealing cap is connected to the through hole by a thread. The provided tube can be connected to a vacuum pump to facilitate the extraction of air from the cavity. After extraction, the pressure inside the cavity is lower than the external pressure, causing the inner cone to press tightly against the inner wall of the outer cone tube, thus sealing the vent holes. In addition, a sealing cap is provided to further improve the sealing effect.

[0008] Furthermore, the rectangular plate has an annular groove formed on the open side, and the inner wall of the cover plate has an embedded ring, which is inserted into the annular groove to improve the sealing effect between the cover plate and the rectangular plate.

[0009] Furthermore, multiple baffles are provided inside the rectangular groove, which can improve the structural strength of the rectangular plate.

[0010] Furthermore, multiple connecting protrusions are provided on the two opposite side walls of the rectangular plate. Inserting protrusions are formed on the connecting protrusions. There is a gap between the inner wall of the inserting protrusion and the outer wall of the rectangular plate. The connecting component includes a concave component between two adjacent rectangular plates. Multiple slots are provided on the concave component. The connecting protrusion is inserted into the slots, and the inserting protrusion is located on the inner side of the concave component. A middle partition is formed on the inner wall of the concave component. Inclined support plates are formed at both ends of the middle partition. Inclined plates are formed at both ends of the concave component. The concave component with a concave structure facilitates the connection and fixation of two adjacent rectangular plates. In order to fix the rectangular plate on the outer wall of the rectangular pipe, a concave fixing component is provided between two adjacent concave components. A fixing screw is passed through the concave fixing component. Both ends of the fixing screw are inserted into the inclined plate, and a fixing nut is threaded to one end of the fixing screw. A concave fitting is welded to the inner wall of the concave fixing component. The inner wall of the concave fitting acts on the outer wall of the inclined support plate.

[0011] Furthermore, the inner wall of the partition is provided with a flexible buffer pad to increase the friction between the partition and the outer wall of the rectangular pipe.

[0012] The advantages of the above technical solution are:

[0013] This invention improves the sound insulation effect of rectangular pipes by vacuuming, and also facilitates the installation and fixing of sound insulation components. Attached Figure Description

[0014] To make the objectives, technical solutions, and advantages of this utility model clearer, the following will provide a further detailed description of this utility model in conjunction with the accompanying drawings.

[0015] Figure 1 A three-dimensional structural diagram of one embodiment is shown.

[0016] Figure 2 A three-dimensional structural diagram of a rectangular plate is shown.

[0017] Figure 3 A cross-sectional view of the rectangular plate is shown.

[0018] Figure 4 A magnified view of point A is shown.

[0019] Figure 5 A three-dimensional structural diagram of the cover plate is shown.

[0020] Figure 6 A three-dimensional structural diagram of the connector is shown.

[0021] Figure 7 A three-dimensional structural diagram of the end of the connector is shown. Detailed Implementation

[0022] like Figures 1-7 As shown, a noise reduction structure for an air outlet duct includes noise reduction units 2 arranged on each surface of a rectangular duct 1, and two adjacent noise reduction units 2 located on the same surface are connected by a connector 3.

[0023] The noise reduction unit 2 includes a rectangular plate 20 with a rectangular groove 21. Multiple partitions 22 are disposed within the rectangular groove 21. One side of the rectangular plate 20 is open, and a raised ring 23 is formed on the outer periphery of the open side of the rectangular groove 21. A cover plate 27 is sealed and fixed to the open side of the rectangular plate 20, and the cover plate 27 is located within the raised ring 23. An annular groove 24 is formed on the open side of the rectangular plate 20, and an embedded ring 28 is formed on the inner wall of the cover plate 27, inserted into the annular groove 24.

[0024] A through hole is provided on the rectangular plate 20. An inner tube 4 is formed on the inner end of the through hole. An outer conical tube 40 is formed on the inner end of the inner tube 4. The inner end of the outer conical tube 40 is the smaller end. A through hole 41 is provided on the inner end of the inner tube 4. An inner tube 42 is connected to the through hole 41 by a thread. A through tube 43 is passed through the inner tube 42. A movable tube 44 is formed on the inner end of the through tube 43. The outer diameter of the movable tube 44 is larger than the outer diameter of the inner tube 42. An inner cone 45 is formed on the inner end of the movable tube 44. The inner end of the inner cone 45 is the smaller end. The outer periphery of the inner cone 45 contacts the inner wall of the outer conical tube 40. A vent hole is provided on the outer periphery of the inner cone 45. An inner extension column 46 is passed through the outer end of the through tube 43. A sealing cap 47 is provided on the outer end of the inner extension column 46. The sealing cap 47 is connected to the through hole 41 by a thread.

[0025] Multiple connecting protrusions 25 are provided on the two opposite side walls of the rectangular plate 20. Inserting protrusions 26 are formed on the connecting protrusions 25, and there is a gap between the inner wall of the inserting protrusions 26 and the outer wall of the rectangular plate 20.

[0026] The connector 3 includes a concave member 30 disposed between two adjacent rectangular plates 20. Multiple slots 31 are formed on the concave member 30. A connecting protrusion 25 is inserted into the slots 31, and the protrusion 26 is located inside the concave member 30. A partition plate 32 is formed on the inner wall of the concave member 30. A flexible buffer pad is provided on the inner wall of the partition plate 32. Inclined support plates 34 are formed at both ends of the partition plate 32, and inclined plates 33 are formed at both ends of the concave member 30. A concave fixing member 36 is provided between two adjacent concave members 30. A fixing screw 37 passes through the concave fixing member 36. Both ends of the fixing screw 37 are inserted into the inclined plates 33, and a fixing nut 38 is threaded to one end of the fixing screw 37. A concave fitting 35 is welded to the inner wall of the concave fixing member 36, and the inner wall of the concave fitting 35 acts on the outer wall of the inclined support plate 34.

[0027] The principle of sound insulation and noise reduction in this embodiment is as follows: the noise generated inside the rectangular pipe 1 will be transmitted outward through its pipe wall. When it is transmitted to the rectangular plate 20, the energy of the noise transmission is weakened, thereby reducing the decibel of the noise. When the noise enters the rectangular groove 21, since it is a vacuum environment, there is no or only a small amount of air or other transmission medium, so the noise is largely isolated. Of course, some noise will inevitably be transmitted outward through solid components such as the rectangular plate 20. This transmission will further reduce the energy of the noise transmission, thereby effectively improving the noise reduction and sound insulation effect.

[0028] In this embodiment, when evacuating the rectangular groove 21, the operator pulls out the inner tube 42 and connects its outer end to the vacuum tube. During the evacuation process, the air inside the rectangular groove 21 is gradually extracted. After the air is extracted, the operator pushes the inner tube 42 inward so that the outer circumference of the inner cone 45 contacts the inner wall of the outer cone tube 40, thereby achieving the effect of sealing the vent hole by the outer cone tube 40. Then, the sealing cap 47 is threadedly connected to the outer end of the perforation.

[0029] In this embodiment, when installing and fixing the rectangular plate 20, the operator presses the inner wall of the rectangular plate 20 tightly against each surface of the rectangular pipe 1 and wraps it around the outer wall of the rectangular pipe 1. Then, each concave component 30 is inserted into the connecting convex plate 25 of two adjacent rectangular plates 20. Next, the concave component 35 is fitted onto the inclined support plate 34, and the fixing screw 37 is inserted into the inclined plate 33 and the concave fixing component 36. After completion, the fixing screw 37 is fixed by fixing nut 38.

[0030] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations of this utility model fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. An air outlet duct noise reduction structure, characterized by, It includes noise reduction units (2) arranged on each surface of the rectangular pipe (1), and two adjacent noise reduction units (2) located on the same surface are connected by connectors (3); The noise reduction unit (2) includes a rectangular plate (20), a rectangular groove (21) is provided on the rectangular plate (20), and one side of the rectangular plate (20) is open. A convex ring (23) is formed on the outer periphery of the opening side of the rectangular groove (21). The rectangular plate (20) is sealed with a cover plate (27) on the open side, and the cover plate (27) is located inside the convex ring (23); A through hole is provided on the rectangular plate (20). An inner tube (4) is formed on the inner end of the through hole. An outer tapered tube (40) is formed on the inner end of the inner tube (4). The inner end of the outer tapered tube (40) is the smaller end. A through hole (41) is provided on the inner end of the inner tube (4). An inner tube (42) is connected to the through hole (41) by a thread. A through tube (43) is inserted into the inner tube (42). A movable tube (44) is formed on the inner end of the through tube (43). The outer diameter of the movable tube (44) is... The inner end of the movable tube (44) is formed with an inner cone (45) larger than the outer diameter of the inner tube (42). The inner end of the inner cone (45) is the small end. The outer circumference of the inner cone (45) is in contact with the inner wall of the outer cone tube (40). A vent hole is opened on the outer circumference of the inner cone (45). An inner extension column (46) is inserted through the outer end of the through tube (43). A sealing cap (47) is provided on the outer end of the inner extension column (46). The sealing cap (47) is connected to the through hole (41) by a thread.

2. The air outlet duct noise reduction structure according to claim 1, characterized in that, The rectangular plate (20) has an annular groove (24) formed on the open side, and the inner wall of the cover plate (27) has an embedded ring (28) formed, which is inserted into the annular groove (24).

3. The air outlet duct noise reduction structure according to claim 1, characterized in that, The rectangular groove (21) is provided with multiple partitions (22).

4. The air outlet duct noise reduction structure according to claim 1, characterized in that, Multiple connecting protrusions (25) are provided on the two opposite side walls of the rectangular plate (20). Inserting protrusions (26) are formed on the connecting protrusions (25). There is a gap between the inner wall of the inserting protrusions (26) and the outer wall of the rectangular plate (20). The connector (3) includes a concave part (30) disposed between two adjacent rectangular plates (20). The concave part (30) has multiple slots (31) provided on it. The connecting convex plate (25) is inserted into the slots (31), and the convex plate (26) is located on the inner side of the concave part (30). A partition plate (32) is formed on the inner wall of the concave part (30). Inclined support plates (34) are formed at both ends of the partition plate (32), and inclined plates (33) are formed at both ends of the concave part (30). A concave fixing member (36) is provided between two adjacent concave parts (30). A fixing screw (37) is provided on the concave fixing member (36). The two ends of the fixing screw (37) are respectively inserted into the inclined plate (33), and a fixing nut (38) is connected to one end of the fixing screw (37) by thread. A concave kit (35) is welded to the inner wall of the concave fixing member (36). The inner wall of the concave kit (35) acts on the outer wall of the inclined support plate (34).

5. The air outlet duct noise reduction structure according to claim 4, characterized in that, The inner wall of the partition (32) is provided with a flexible cushioning pad.

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