Ventilation noise reduction environmental protection device

By designing a ventilation and noise reduction environmental protection device including sound-absorbing cotton and sound-absorbing partitions in the granary air supply system, the problem of noise pollution in the granary air supply system is solved, and the noise reduction and environmental purification are achieved.

CN222731804UActive Publication Date: 2025-04-08CHONGQING SHANGQIAO GRAIN TRANSFER DEPOT CO LTD +2
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Patent Information

Application Number
CN202421643731.3
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-07-12
Publication Date
2025-04-08
Estimated Expiration
2034-07-12

AI Technical Summary

Technical Problem

The existing granary air supply system generates large noise during operation, resulting in environmental noise pollution.

Method used

A ventilation and noise reduction environmental protection device is designed, including installing a first ventilation duct and a second ventilation duct on the induced fan, and a sound-absorbing cotton and a sound-absorbing partition are provided in the first ventilation duct, and the sound-absorbing cotton and a sound-absorbing partition divide the tube cavity into an independent chamber to further reduce noise.

Benefits of technology

It effectively reduces the noise generated by the induced fan, significantly improves the environmental noise pollution problem, and provides an environmentally friendly solution for ventilation and noise reduction with low noise during operation.

✦ Generated by Eureka AI based on patent content.

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Patent Text Reader

Abstract

The utility model discloses a ventilation noise reduction and environmental protection device. The ventilation noise reduction and environmental protection device comprises an induced draft fan for inducing air, a first ventilation pipe for being installed on the induced draft fan at the air inlet end of the induced draft fan, and a second ventilation pipe installed on the induced draft fan at the air outlet end of the induced draft fan, the first ventilation pipe has a first tube cavity penetrating the first ventilation pipe, the first tube cavity is used for air to flow toward the induced draft fan under the action of the induced draft fan, the first ventilation pipe has sound-absorbing cotton for absorbing noise, the sound-absorbing cotton is in a circular ring shape, and the sound-absorbing cotton is arranged along the length direction of the first ventilation pipe, a sound-absorbing partition is also installed in the tube cavity of the first ventilation pipe, the sound-absorbing partition is arranged along the length direction of the first ventilation pipe, the sound-absorbing partition divides the tube cavity of the first ventilation pipe into independent chambers, the second ventilation pipe has sound-absorbing cotton for absorbing noise, and the second ventilation pipe has a second tube cavity penetrating the second ventilation pipe. The utility model ventilation noise reduction and environmental protection device has low noise and can protect the environment from being polluted by noise.
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Description

Technical Field

[0001] The utility model relates to the technical field of granary air supply, in particular to a ventilation noise reduction and environmental protection device. Background Art

[0002] At present, granaries need to be ventilated regularly, and induced draft fans are usually installed at the air exchange ports of the granaries. The induced draft fans directly send air outside the granaries into the granaries. The induced draft fans are directly exposed to the outside and generate very loud noise during operation, causing noise pollution to the surrounding environment. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a ventilation noise reduction and environmental protection device with low noise during operation.

[0004] In order to solve the above problems, the utility model provides a ventilation and noise reduction environmental protection device, which includes an induced draft fan for induced air, a first ventilation pipe for installation on the induced draft fan at the air inlet end of the induced draft fan, and a second ventilation pipe installed on the induced draft fan at the air outlet end of the induced draft fan, the first ventilation pipe has a first tube cavity running through the first ventilation pipe, the first tube cavity is used for air to flow toward the induced draft fan under the action of the induced draft fan, the first ventilation pipe has sound-absorbing cotton for absorbing noise, the sound-absorbing cotton is in a circular ring shape, and the sound-absorbing cotton is arranged along the length direction of the first ventilation pipe, a sound-absorbing baffle is also installed in the tube cavity of the first ventilation pipe, the sound-absorbing baffle is arranged along the length direction of the first ventilation pipe, the sound-absorbing baffle divides the tube cavity of the first ventilation pipe into independent chambers, the second ventilation pipe has sound-absorbing cotton for absorbing noise, and the second ventilation pipe has a second tube cavity running through the second ventilation pipe.

[0005] Furthermore, the sound-absorbing partition includes a partition frame, a pressure plate and sound insulation cotton, the plate frame has a receiving groove, the sound insulation cotton is arranged in the receiving groove, the pressure plate is arranged in the receiving groove and supports and restricts the sound insulation cotton, and the pressure plate is provided with perforations.

[0006] Furthermore, the partition frame includes two vertical beams adapted to the inner wall of the first ventilation duct and two horizontal beams fixing and connecting the upper and lower ends of the two vertical beams into one, the vertical beams have vertical grooves, the horizontal beams have horizontal grooves, and the vertical grooves and the horizontal grooves enclose to form a receiving groove.

[0007] Furthermore, the vertical groove of the vertical beam is formed by bending the vertical beam.

[0008] Furthermore, the transverse groove of the crossbeam is formed by bending the crossbeam.

[0009] Furthermore, the outer surface of the crossbeam has a wind guiding surface for guiding air.

[0010] Furthermore, the first ventilation duct includes a first tube shell, a first connecting sleeve, sound-absorbing cotton and a first fixing tube, the first tube shell has an installation space, the sound-absorbing cotton is installed in the installation space, the first fixing tube is fixed in the first tube shell, the first fixing tube has a through hole for sound to penetrate to the sound-insulating cotton, and the first connecting sleeve is fixed on the first tube shell.

[0011] Furthermore, the second ventilation duct includes a second tube shell, a second connecting sleeve, sound-absorbing cotton and a second fixing tube, the second tube shell has an installation space, the sound-absorbing cotton is installed in the installation space, the second fixing tube is fixed in the second tube shell, the second fixing tube has a through hole for sound to penetrate to the sound-insulating cotton, and the second connecting sleeve is fixed on the second tube shell.

[0012] Furthermore, the second connection includes a connecting section and a silencing section, the connecting section and the silencing section are connected as a whole, the diameter of the silencing section is smaller than the diameter of the tube cavity of the second ventilation pipe, and the silencing section has a silencing hole.

[0013] Furthermore, the induced draft fan is an axial flow fan.

[0014] The utility model ventilation noise reduction environmental protection device utilizes an induced draft fan to induce air, and utilizes sound-absorbing cotton in the first ventilation duct and the second ventilation duct to reduce noise, and further arranges a sound-absorbing partition in the first ventilation duct, and arranges the first ventilation duct into multiple independent chambers to further reduce noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a preferred implementation of the ventilation noise reduction and environmental protection device of the utility model.

[0016] Figure 2 Schematic diagram of the structure of the first ventilation duct.

[0017] Figure 3 It is a structural diagram of a sound-absorbing partition.

[0018] Figure 4 It is a longitudinal cross-sectional view of the sound-absorbing partition.

[0019] Figure 5 It is a transverse cross-sectional view of the sound-absorbing partition.

[0020] Figure 6 It is a structural schematic diagram of the second ventilation duct.

[0021] Figure 7 It is a structural schematic diagram of another implementation manner of the second connecting sleeve.

[0022] The meanings of the symbols in the accompanying drawings are:

[0023] Induced draft fan 1, first ventilation pipe 2, first tube cavity 20, first tube shell 21, first connecting sleeve 22, first sound-absorbing cotton 23, first fixed tube 24, first through hole 241, second ventilation pipe 3, second tube shell 31, second connecting sleeve 32, connecting section 321, silencer section 322, silencer hole 3221, second sound-absorbing cotton 33, second fixed tube 34, second through hole 341, sound-absorbing partition 4, partition frame 41, vertical beam 411, vertical groove 4111, horizontal beam 412, horizontal groove 4121, pressure plate 42, perforation 421, sound-absorbing cotton 43. DETAILED DESCRIPTION

[0024] The utility model will be further described below in conjunction with the accompanying drawings.

[0025] Embodiment 1

[0026] like Figure 1 As shown, a preferred embodiment of the ventilation, noise reduction and environmental protection device of the utility model includes an induced draft fan 1, a first ventilation pipe 2 and a second ventilation pipe 3. The first ventilation pipe 2 is installed on the induced draft fan 1, and the first ventilation pipe 2 is located at the air inlet end of the induced draft fan 1, and the first ventilation pipe 2 can be silenced. The second ventilation pipe 3 is installed on the induced draft fan 1, and the second ventilation pipe 3 is located at the air outlet end of the induced draft fan 1. The second ventilation pipe 3 is used to be installed at the air exchange port of the granary, and the second ventilation pipe 3 can be silenced. The induced draft fan 1 is started, and the air is introduced into the first ventilation pipe 2, and then discharged into the granary through the second ventilation pipe 3. The noise generated by the induced draft fan 1 can be greatly reduced by silencing the first ventilation pipe 2 and the second ventilation pipe 3. The induced draft fan 1 adopts an axial flow fan, which is convenient for reducing the height and keeping the entire device in a straight line for easy transportation.

[0027] like Figure 2 As shown, the first ventilation pipe 2 includes a first tube cavity 20 that runs through the first ventilation pipe 2. The first tube cavity 20 is used for air to flow therein, that is, the air induced by the induced draft fan 1 after the induced draft fan 1 is started flows along the first tube cavity 20 toward the induced draft fan 1 under the action of the induced draft fan 1. A sound-absorbing baffle 4 is arranged in the first tube cavity 20. There are two sound-absorbing baffles 4. The two suction baffles are symmetrically arranged around the center of the first tube cavity 20 to divide the first tube cavity 20 into three independent chambers. The sound-absorbing baffle 4 is used to absorb noise. The sound-absorbing baffle 4 can not only absorb noise itself, but also further reduce noise by dividing the first tube cavity 20.

[0028] The first ventilation pipe 2 includes a first tube shell 21, a first connecting sleeve 22, a first sound-absorbing cotton 23 and a first fixed tube 24. The first tube shell 21 has an installation space, the first tube shell 21 protrudes outward from the first tube shell 21 to form an installation space, the first sound-absorbing cotton 23 is installed in the installation space and fills the protruding installation space flat, that is, the side of the first sound-absorbing cotton 23 close to the center of the first tube shell 21 is flush with the inner wall of the first tube shell 21, and the first fixed tube 24 can be set as a straight tube, which is convenient for installation; the first sound-absorbing cotton 23 is arranged along the length direction of the first ventilation pipe 2, and the length of the first sound-absorbing cotton 23 is increased as much as possible; the first sound-absorbing cotton 23 is in a circular ring shape, which is convenient for arranging the first fixed tube 24 on the side of the first sound-absorbing cotton 23 close to the center of the first tube shell 21. The first fixed tube 24 is fixed in the first tube shell 21, and the first fixed tube 24 confines the first sound-absorbing cotton 23 in the installation space to ensure that the first sound-absorbing cotton 23 cannot move. The first fixing tube 24 is provided with a plurality of first through holes 241, and the first through holes 241 are used to allow sound to penetrate into the sound-insulating cotton 43, so as to ensure that the first sound-absorbing cotton 23 can eliminate noise. The first connecting sleeve 22 is fixed on the first tube shell 21, and connecting sleeves are arranged at both ends of the first tube shell 21, so as to facilitate connection with other equipment.

[0029] like Figures 3 to 5 As shown, the sound-absorbing partition 4 includes a partition frame 41, a pressure plate 42 and sound insulation cotton 43. The plate frame has a receiving groove, and the sound insulation cotton 43 is arranged in the receiving groove. The pressure plate 42 is arranged in the receiving groove and supports and limits the sound insulation cotton 43. Pressure plates 42 are arranged on both sides of the sound insulation cotton 43 to ensure that the sound insulation cotton 43 is fixed in the receiving groove. The pressure plate 42 is provided with a perforation 421, and the noise can reach the sound insulation cotton 43 through the perforation 421. The noise is absorbed by the sound insulation cotton 43, thereby reducing the noise. Specifically, the partition frame 41 includes two vertical beams 411 and two horizontal beams 412. The two vertical beams 411 are arranged opposite to each other. The two ends of the two vertical beams 411 are respectively connected and fixed by a horizontal beam 412 to form a whole. The outer wall contour of the vertical beam 411 is adapted to the inner wall of the first ventilation pipe 2, that is, the outer wall of the vertical beam 411 is in an arc shape, which facilitates the vertical beam 411 to be well fitted when it is welded to the first fixed cylinder 24 without any gap. The vertical beam 411 has a vertical groove 4111, which is formed by bending the vertical beam 411; the horizontal beam 412 has a horizontal groove 4121, which is formed by bending the horizontal beam 412; the vertical groove 4111 and the horizontal groove 4121 are enclosed to form a receiving groove. The outer surface of the cross beam 412 has a wind guiding surface for guiding air, and the wind guiding surface is two inclined surfaces, so that the cross beam 412 is in a Λ shape, which is convenient for guiding the air to flow to the two sides of the sound-absorbing baffle 4, reducing the friction between the air and the sound-absorbing baffle 4, and reducing noise.

[0030] like Figure 6 As shown, the second ventilation pipe 3 includes a second tube shell 31, a second connecting sleeve 32, a second sound-absorbing cotton 33 and a second fixed tube 34. The second tube shell 31 has an installation space, and the second tube shell 31 protrudes outward from the second tube shell 31 to form an installation space. The second sound-absorbing cotton 33 is installed in the installation space and fills the protruding installation space flat, that is, the side of the second sound-absorbing cotton 33 close to the center of the second tube shell 31 is flush with the inner wall of the second tube shell 31, and the second fixed tube 34 can be set as a straight tube, which is convenient for installation; the second sound-absorbing cotton 33 is arranged along the length direction of the second ventilation pipe 3, and the length of the second sound-absorbing cotton 33 is increased as much as possible; the second sound-absorbing cotton 33 is in a circular ring shape, which is convenient for arranging the second fixed tube 34 on the side of the second sound-absorbing cotton 33 close to the center of the second tube shell 31. The second fixed tube 34 is fixed in the second tube shell 31, and the second fixed tube 34 confines the second sound-absorbing cotton 33 in the installation space to ensure that the second sound-absorbing cotton 33 cannot move. The second fixing tube 34 is provided with a plurality of second through holes 341, and the second through holes 341 are used to allow sound to penetrate into the sound-insulating cotton 43, so as to ensure that the second sound-absorbing cotton 33 can eliminate noise. The second connecting sleeve 32 is fixed on the second tube shell 31, and connecting sleeves are arranged at both ends of the second tube shell 31, so as to facilitate connection with other equipment.

[0031] At the same time, the sound-absorbing cotton in the first ventilation duct 2 and the second ventilation duct 3 is used to reduce noise. A sound-absorbing partition 4 is also arranged in the first ventilation duct 2, and the first ventilation duct 2 is arranged into multiple independent chambers to further reduce noise.

[0032] Embodiment 2

[0033] The present embodiment is different from the first embodiment in that the second connecting sleeve 32 connecting the second ventilation pipe 3 and the induced draft fan 1 has a different structure.

[0034] like Figure 7 As shown, specifically, the second connecting sleeve 32 includes a connecting section 321 and a muffler section 322, the connecting section 321 and the muffler section 322 are connected as a whole, the diameter of the muffler section 322 is smaller than the diameter of the tube cavity of the second ventilation pipe 3, and the muffler section 322 is provided with a muffler hole 3221, and the air passing through the muffler hole 3221 will slow down a certain flow rate, thereby reducing noise, and then the second sound-absorbing cotton 33 in the second ventilation pipe 3 is used for sound absorption, further reducing noise. Multiple noise reductions result in lower noise.

[0035] The above are only implementation methods of the present utility model, and are not intended to limit the patent scope of the present utility model. Any equivalent structure made using the contents of the specification and drawings of the present utility model, directly or indirectly used in other related technical fields, are also within the patent protection scope of the present utility model.

Claims

1. Ventilation and noise reduction environmental protection device, characterized by: It includes an induced draft fan for induced air, a first ventilation pipe for installation on the induced draft fan at the air inlet end of the induced draft fan, and a second ventilation pipe installed on the induced draft fan at the air outlet end of the induced draft fan, the first ventilation pipe has a first tube cavity running through the first ventilation pipe, the first tube cavity is used for air to flow toward the induced draft fan under the action of the induced draft fan, the first ventilation pipe has sound-absorbing cotton for absorbing noise, the sound-absorbing cotton is in a circular ring shape, and the sound-absorbing cotton is arranged along the length direction of the first ventilation pipe, a sound-absorbing baffle is also installed in the tube cavity of the first ventilation pipe, the sound-absorbing baffle is arranged along the length direction of the first ventilation pipe, the sound-absorbing baffle divides the tube cavity of the first ventilation pipe into independent chambers, the second ventilation pipe has sound-absorbing cotton for absorbing noise, and the second ventilation pipe has a second tube cavity running through the second ventilation pipe.

2. The ventilation noise reduction environmental protection device according to claim 1, characterized in that: The sound-absorbing partition includes a partition frame, a pressing plate and sound insulation cotton. The partition frame has a receiving groove, the sound insulation cotton is arranged in the receiving groove, the pressing plate is arranged in the receiving groove and supports and restricts the sound insulation cotton, and the pressing plate is provided with perforations.

3. The ventilation noise reduction environmental protection device according to claim 2, characterized in that: The partition frame includes two vertical beams adapted to the inner wall of the first ventilation duct and two horizontal beams fixing and connecting the upper and lower ends of the two vertical beams into one body, the vertical beams have vertical grooves, the horizontal beams have horizontal grooves, and the vertical grooves and the horizontal grooves enclose to form a receiving groove.

4. The ventilation noise reduction environmental protection device according to claim 3, characterized in that: The vertical groove of the vertical beam is formed by bending the vertical beam.

5. The ventilation noise reduction environmental protection device according to claim 3, characterized in that: The transverse groove of the crossbeam is formed by bending the crossbeam.

6. The ventilation noise reduction environmental protection device according to claim 3, characterized in that: The outer surface of the cross beam has a wind guiding surface for guiding air.

7. The ventilation noise reduction environmental protection device according to claim 1, characterized in that: The first ventilation pipe includes a first tube shell, a first connecting sleeve, sound-absorbing cotton and a first fixing tube. The first tube shell has an installation space. The sound-absorbing cotton is installed in the installation space. The first fixing tube is fixed in the first tube shell. The first fixing tube has a through hole for sound to penetrate to the sound-insulating cotton. The first connecting sleeve is fixed on the first tube shell.

8. The ventilation noise reduction and environmental protection device according to claim 1, characterized in that: The second ventilation duct includes a second tube shell, a second connecting sleeve, sound-absorbing cotton and a second fixing tube. The second tube shell has an installation space. The sound-absorbing cotton is installed in the installation space. The second fixing tube is fixed in the second tube shell. The second fixing tube has a through hole for sound to penetrate to the sound-insulating cotton. The second connecting sleeve is fixed on the second tube shell.

9. The ventilation noise reduction environmental protection device according to claim 8, characterized in that: The second connection includes a connecting section and a muffler section, the connecting section and the muffler section are connected as a whole, the diameter of the muffler section is smaller than the diameter of the tube cavity of the second ventilation pipe, and the muffler section has a muffler hole.

10. The ventilation noise reduction environmental protection device according to claim 1, characterized in that: The induced draft fan is an axial flow fan.