Galvanized air pipe noise reduction mechanism

Abstract

The utility model discloses a galvanized air pipe noise reduction mechanism which comprises a galvanized pipe, a flange plate and a middle pipe, the flange plate is welded to one end of the galvanized pipe, the middle pipe is fastened to the end, away from the galvanized pipe, of the flange plate through a bolt, a butt joint pipeline is fastened to the other end of the middle pipe through a bolt, and inner fixing plates are fixed to the two ends of the middle pipe. A connecting groove is formed in the inner wall of the inner fixing disc, and a noise reduction base plate is embedded into the inner wall of the connecting groove. When the galvanized air pipe noise reduction mechanism is used, the noise reduction base plates serve as noise reduction parts and are designed and manufactured through a micro-perforated plate acoustic structure, and the multiple noise reduction base plates are matched with one another to form a round object to conduct adsorption and noise reduction treatment on aerodynamic noise radiated by an air inlet and an air outlet of the round object. Noise reduction treatment on aerodynamic noise is met, and the requirement for noise pollution treatment is met.

Description

Technical Field

[0001] The utility model relates to the technical field of galvanized air ducts, in particular to a noise reduction mechanism for galvanized air ducts. Background Art

[0002] Galvanized steel pipes are widely used in our daily lives. These are welded steel pipes coated with a hot-dip or electroplated zinc layer. Galvanizing increases the pipe's corrosion resistance and extends its service life. Galvanized air ducts, one of the uses of galvanized steel pipes, guide airflow to meet the needs of normal production operations.

[0003] When the galvanized air ducts on the market are in use, people near the air inlet and outlet of the fan are exposed to aerodynamic noise radiation, which creates a bad working environment for users, forms a public nuisance, and causes trouble to users. For this reason, we propose a noise reduction mechanism for galvanized air ducts. Utility Model Content

[0004] The purpose of the utility model is to provide a galvanized air duct noise reduction mechanism to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a galvanized air duct noise reduction mechanism, comprising a galvanized pipe, a flange and an intermediate pipe, a flange welded to one end of the galvanized pipe, and the end of the flange away from the galvanized pipe is bolted to the intermediate pipe, the other end of the intermediate pipe is bolted to a docking pipe, inner fixing plates are fixed at both ends of the intermediate pipe, and a connecting groove is opened on the inner wall of the inner fixing plate, and a noise reduction pad is embedded in the inner wall of the connecting groove.

[0006] Preferably, a plurality of the noise reduction pads are provided, and the plurality of the noise reduction pads are evenly distributed along the interior of the inner fixing plate.

[0007] Preferably, a docking flange is fixed to one end of the inner fixing plate away from the noise reduction pad, and the docking flange at one end is fastened to the docking pipe bolts, and the docking flange at the other end is fastened to the flange bolts.

[0008] Preferably, the intermediate pipe is distributed between the galvanized pipe and the butt-joint pipe, and the galvanized pipe, the intermediate pipe and the butt-joint pipe are sequentially connected to each other.

[0009] Preferably, an adhesive layer is bonded to the outer walls of the galvanized pipe and the butt-joint pipe, and a noise reduction sponge pad for noise reduction protection is bonded to the adhesive layer away from the outer walls of the galvanized pipe and the butt-joint pipe.

[0010] Preferably, the galvanized pipe and the butt-joint pipe have the same structure, and the galvanized pipe, the butt-joint pipe and the intermediate pipe are detachably connected.

[0011] Compared with the prior art, the beneficial effects of the present invention are: when the galvanized air duct noise reduction mechanism is used, the noise reduction pad serves as a noise reduction component and is designed and manufactured with a micro-perforated plate acoustic structure. Its multiple noise reduction pads cooperate with each other to form a circular object to absorb and reduce the aerodynamic noise radiated from its air inlet and outlet, thereby meeting the noise reduction requirements for aerodynamic noise and complying with the needs of controlling noise pollution.

[0012] The connecting groove on the inner wall of the inner fixing plate is fixedly connected to the noise reduction pad. The inner fixing plates at both ends can effectively ensure the expansion of the noise reduction pad, reduce the amplitude of deformation caused by external force, and meet the long-term use requirements of the noise reduction pad.

[0013] The intermediate pipe is a consumable part and needs to be disassembled and maintained regularly by the user to ensure normal use of the intermediate pipe. Its flange connection method meets the user's needs to disassemble the galvanized pipe and the docking pipe from the intermediate pipe, making it convenient for users to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the internal structure of the intermediate tube of the utility model;

[0016] Figure 3 This is a schematic diagram of the cross-sectional structure of the galvanized pipe of the present invention.

[0017] In the figure: 1. Galvanized pipe; 11. Noise-reducing sponge pad; 12. Adhesive layer; 2. Flange; 3. Intermediate pipe; 31. Internal fixing plate; 32. Connecting groove; 33. Noise-reducing pad; 34. Docking flange; 35. Through hole; 4. Docking pipe. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. Example 1

[0019] See also Figure 1-3The utility model provides a technical solution: a galvanized air duct noise reduction mechanism, comprising a galvanized pipe 1, a flange 2 and an intermediate pipe 3, one end of the galvanized pipe 1 is welded with a flange 2, and the end of the flange 2 away from the galvanized pipe 1 is bolted to the intermediate pipe 3, and the other end of the intermediate pipe 3 is bolted to the docking pipe 4, and the two ends of the intermediate pipe 3 are fixed with inner fixing plates 31, and the inner wall of the inner fixing plate 31 is provided with a connecting groove 32, and the inner wall of the connecting groove 32 is embedded with a noise reduction pad 33, and a plurality of noise reduction pads 33 are provided, and the plurality of noise reduction pads 33 are evenly distributed along the interior of the inner fixing plate 31, and the end of the inner fixing plate 31 away from the noise reduction pad 33 is fixed with a docking flange 34, and the docking flange 34 at one end is bolted to the docking pipe 4, and the docking flange 34 at the other end is bolted to the flange 2. The noise reduction pad 33 is used as a noise reduction component and is designed and manufactured with a micro-perforated plate acoustic structure. The plates 33 cooperate with each other to form a circular object to absorb and reduce the aerodynamic noise radiated by its air inlet and outlet, thereby meeting the needs of noise reduction for aerodynamic noise and controlling noise pollution. At the same time, the noise reduction pad 33 is a thin plate, and holes are punched on the thin plate with a drill bit with an aperture less than 1 mm. The perforation rate is 1%-5%. By selecting different perforation rates and cavity depths with different plate thicknesses, the spectral performance of the muffler can be controlled to achieve good noise reduction effect within the required frequency range. In order to reduce the deformation of the noise reduction pad 33 by external force, the noise reduction pad 33 is connected to the inner fixed plate 31 in an embedded connection manner. The connecting groove 32 opened on the inner wall of the inner fixed plate 31 is fixedly connected to the noise reduction pad 33. The inner fixed plates 31 at both ends can effectively ensure that the noise reduction pad 33 is unfolded, reduce the amplitude of deformation by external force, and meet the needs of long-term use of the noise reduction pad 33. Example 2

[0020] See also Figure 1-3The utility model provides a technical solution: a galvanized air duct noise reduction mechanism, the intermediate pipe 3 is distributed between the galvanized pipe 1 and the docking pipe 4, and the galvanized pipe 1, the intermediate pipe 3 and the docking pipe 4 are sequentially connected to each other, the structures of the galvanized pipe 1 and the docking pipe 4 are consistent, and the galvanized pipe 1 and the docking pipe 4 are detachably connected to the intermediate pipe 3, and the intermediate pipe 3 is connected to the galvanized pipe 1 and the docking pipe 4 by means of flange connection, one end of the intermediate pipe 3 is bolted to the docking pipe 4 by a docking flange 34, and the other end is also bolted to the flange plate 2 by a docking flange 34. This connection structure has high connection strength and strong airtightness, which reduces the possibility of internal air flowing out from the gap between the two. At the same time, due to the intermediate pipe The intermediate pipe 3 is a consumable part and the user needs to disassemble and maintain the intermediate pipe 3 regularly to ensure that the intermediate pipe 3 can be used normally. Its flange connection method also meets the user's need to disassemble the galvanized pipe 1 and the docking pipe 4 from the intermediate pipe 3, which is convenient for users to use. The outer walls of the galvanized pipe 1 and the docking pipe 4 are bonded with a bonding layer 12, and the bonding layer 12 is away from the outer walls of the galvanized pipe 1 and the docking pipe 4. A noise reduction sponge pad 11 for noise reduction protection is bonded to the outer walls of the galvanized pipe 1 and the docking pipe 4. The outer walls of the galvanized pipe 1 and the docking pipe 4 are bonded with a noise reduction sponge pad 11. The excellent sound absorption of the noise reduction sponge pad 11 can reduce the radiation range of aerodynamic noise, bring an excellent use environment to people around, and facilitate users.

[0021] Working principle: For this type of galvanized air duct noise reduction mechanism, first connect the flange 2 at one end of the galvanized pipe 1 with the docking flange 34 at the intermediate pipe 3. At this time, the flange 2 at the docking pipe 4 is connected to the docking flange 34 at the intermediate pipe 3. When the fan starts, the aerodynamic noise radiated by its air inlet and outlet, its multiple noise reduction pads 33 cooperate with each other to form a circular object to absorb and reduce the aerodynamic noise radiated by its air inlet and outlet. At the same time, the noise reduction pad 33 is a thin plate, and a drill with an aperture of less than 1mm is used to perforate the thin plate. The perforation rate is 1% to 5%. Different The cavity depth with different perforation rates and plate thicknesses can control the spectral performance of the silencer so that it can obtain a good sound-absorbing effect within the required frequency range. In order to reduce the deformation of the noise reduction pad 33 caused by external force, the noise reduction pad 33 is connected to the inner fixing plate 31 in an embedded connection manner. The connecting groove 32 opened on the inner wall of the inner fixing plate 31 is fixedly connected to the noise reduction pad 33. The inner fixing plates 31 at both ends can effectively ensure that the noise reduction pad 33 is unfolded. Finally, when the user needs to disassemble and inspect the intermediate pipe 3, it is only necessary to remove the bolts between the intermediate pipe 3 and the galvanized pipe 1 and the docking pipe 4 to inspect the interior of the intermediate pipe 3.

Claims

1. A galvanized air duct noise reduction mechanism, comprising a galvanized pipe (1), a flange (2) and an intermediate pipe (3), characterized in that: A flange (2) is welded to one end of the galvanized pipe (1), and an intermediate pipe (3) is fastened to one end of the flange (2) away from the galvanized pipe (1) by bolts, and a docking pipe (4) is fastened to the other end of the intermediate pipe (3) by bolts, and inner fixing plates (31) are fixed to both ends of the intermediate pipe (3), and a connecting groove (32) is provided on the inner wall of the inner fixing plate (31), and a noise reduction pad (33) is embedded in the inner wall of the connecting groove (32).

2. The galvanized air duct noise reduction mechanism according to claim 1, characterized in that: A plurality of the noise reduction pads (33) are provided, and the plurality of the noise reduction pads (33) are evenly distributed along the interior of the inner fixing plate (31).

3. The galvanized air duct noise reduction mechanism according to claim 2, characterized in that: A docking flange (34) is fixed to one end of the inner fixing plate (31) away from the noise reduction pad (33), and the docking flange (34) at one end is fastened with bolts to the docking pipe (4), and the docking flange (34) at the other end is fastened with bolts to the flange plate (2).

4. The galvanized air duct noise reduction mechanism according to claim 1, characterized in that: The intermediate pipe (3) is distributed between the galvanized pipe (1) and the butt-joint pipe (4), and the galvanized pipe (1), the intermediate pipe (3) and the butt-joint pipe (4) are sequentially connected to each other.

5. The galvanized air duct noise reduction mechanism according to claim 1, characterized in that: The outer walls of the galvanized pipe (1) and the butt-joint pipe (4) are bonded with an adhesive layer (12), and the adhesive layer (12) is bonded with a noise reduction sponge pad (11) for noise reduction protection away from the outer walls of the galvanized pipe (1) and the butt-joint pipe (4).

6. The galvanized air duct noise reduction mechanism according to claim 1, characterized in that: The galvanized pipe (1) and the butt-joint pipe (4) have the same structure, and the galvanized pipe (1) and the butt-joint pipe (4) are detachably connected to the intermediate pipe (3).

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