Noise reduction device for desulfurization oxidation fan

Abstract

The utility model relates to the technical field of sound insulation of fans, and discloses a device for noise reduction of a desulfurization oxidation fan, which comprises a first air inlet pipe and a second air inlet pipe, a connecting flange is mounted at the bottom of the first air inlet pipe, and the first air inlet pipe is mounted at the air inlet end of a Roots blower through the connecting flange. The second air inlet pipe is installed at the top of the first air inlet pipe through a connecting assembly, an air inducing cover is installed at the top of the second air inlet pipe and comprises a connecting pipe, the connecting pipe is arranged at the top of the second air inlet pipe, and a cover plate is fixedly connected to the top of the connecting pipe. According to the Roots blower, airflow entering the Roots blower is guided through the second air inlet pipe and the air inducing cover so as to avoid turbulence of the airflow entering the Roots blower, meanwhile, airflow pushed back when the Roots blower works is blocked through the first air inlet pipe so as to avoid the influence of the airflow on the airflow entering the Roots blower, and therefore the stability of air inlet of the Roots blower is guaranteed, and the service life of the Roots blower is prolonged. Therefore, noise generated in the working process is reduced.

Description

Technical Field

[0001] This utility model relates to the field of fan noise insulation technology, and in particular to a device for noise reduction of desulfurization oxidation fans. Background Technology

[0002] Desulfurization and oxidation blowers, especially Roots blowers, are widely used in industrial desulfurization and oxidation gas treatment processes. Roots blowers provide necessary airflow support by efficiently compressing air. However, their operation is often accompanied by significant noise, especially in the air inlet area. This noise not only affects the comfort of the production environment but also adversely impacts the normal operation of the equipment.

[0003] When a Roots blower is operating, the inlet typically experiences significant vibrations, originating from the blower's rotation and the impact of the internal fluid. During high-speed rotation, the blower rotor, due to its unique structure and operating mode, often experiences a reverse airflow phenomenon between the intake airflow and the rotor. This reverse airflow causes airflow instability, resulting in strong airflow pulsations and disturbing the airflow within the intake duct. This disturbance generates considerable noise within the intake duct.

[0004] Noise inside the intake pipe not only affects the operational stability of the fan system but also impacts the surrounding environment. In severe cases, it can lead to a decline in fan performance and even affect the lifespan of the equipment. Furthermore, excessive noise can negatively affect the operator's working environment, thereby disrupting normal production and work order. Utility Model Content

[0005] To overcome the above deficiencies, this utility model provides a device for noise reduction of desulfurization oxidation blowers, which aims to improve the problem of excessive noise inside the intake pipe caused by the vibration of the air inlet and the reverse airflow between the intake air and the rotor during the operation of Roots blowers.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A device for noise reduction of a desulfurization oxidation blower includes an inlet pipe one and an inlet pipe two. The bottom of the inlet pipe one is equipped with a connecting flange and is installed at the air inlet end of the Roots blower through the connecting flange. The inlet pipe two is installed on the top of the inlet pipe one through a connecting assembly, and an air duct cover is installed on the top of the inlet pipe two.

[0008] The air intake cover includes a connecting pipe, which is installed at the top of the second air intake pipe. A cover plate is fixedly connected to the top of the connecting pipe. A filter screen is installed on the outside of the cover plate, and an air guide seat is installed inside the cover plate. The air guide seat is located in the upper part of the central cavity of the second air intake pipe.

[0009] As a further description of the above technical solution:

[0010] The air intake pipe includes an air inlet duct, which is fixedly connected to the top of the connecting flange. A sound-absorbing cylinder is installed inside the air inlet duct, and multiple check rings are installed on the inner side of the sound-absorbing cylinder.

[0011] As a further description of the above technical solution:

[0012] The air intake pipe also includes a diversion mesh, which is fixedly connected inside the sound-absorbing cylinder and is located above the check ring.

[0013] As a further description of the above technical solution:

[0014] The second air intake pipe includes a second air intake duct, which is installed on the upper part of the first air intake pipe. A second sound-absorbing duct is fixedly connected inside the second air intake duct, and a spiral air guide strip is installed on the inner wall of the second sound-absorbing duct.

[0015] As a further description of the above technical solution:

[0016] The connecting assembly includes flange one and flange two. Flange one is installed on the top of the air inlet duct one, and flange two is installed on the bottom of the air inlet duct two. Flange two and flange one are connected by connecting bolts.

[0017] As a further description of the above technical solution:

[0018] A shock-absorbing component is installed on the outside of the second air intake pipe. The shock-absorbing component includes a clamp, which is fixedly connected to the outside of the second air intake pipe. Multiple fixing seats are fixedly connected to the outside of the clamp, and multiple anti-vibration hammers are fixedly connected to the middle of the fixing seats.

[0019] As a further description of the above technical solution:

[0020] A sealing gasket is installed at the bottom of the connecting flange, and the bottom of the sealing gasket is in contact with the Roots blower;

[0021] As a further description of the above technical solution:

[0022] The lower surface of the sound-absorbing cylinder is lower than the lower surface of the first air inlet cylinder, the lower surface of the second sound-absorbing cylinder is lower than the lower surface of the second air inlet cylinder, and the second sound-absorbing cylinder and the second air inlet cylinder are in contact with each other.

[0023] This utility model has the following beneficial effects:

[0024] 1. In this utility model, the incoming airflow is guided by the second air inlet pipe and the air duct cover to avoid turbulence in the incoming airflow. At the same time, the first air inlet pipe blocks the airflow pushed back by the Roots blower during operation to avoid the airflow affecting the incoming airflow. This ensures the stability of the Roots blower's air intake and reduces noise generation during operation.

[0025] 2. In this utility model, by installing a shock-absorbing component on the outside of the second intake pipe, the vibration generated when the Roots blower is working is transmitted to the anti-vibration hammer position and dispersed by the anti-vibration hammer, thereby reducing the shaking of the second intake pipe and further ensuring the stability of the airflow inside the second intake pipe. Attached Figure Description

[0026] Figure 1 This is a three-dimensional schematic diagram of a device for noise reduction of a desulfurization oxidation fan proposed in this utility model;

[0027] Figure 2 This is a schematic diagram of the air intake cover of a device for noise reduction of a desulfurization oxidation fan proposed in this utility model;

[0028] Figure 3 This is an exploded structural diagram of a device for noise reduction of a desulfurization oxidation fan proposed in this utility model.

[0029] Figure 4 This is a schematic cross-sectional view of a device for noise reduction of a desulfurization oxidation fan proposed in this utility model;

[0030] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0031] Figure 6 for Figure 4 Enlarged view of point B in the middle.

[0032] Legend:

[0033] 1. Inlet pipe one; 11. Air inlet duct one; 12. Sound absorber one; 13. Diverter mesh; 14. Check ring; 2. Inlet pipe two; 21. Air inlet duct two; 22. Sound absorber two; 23. Spiral air guide strip; 3. Air intake cover; 31. Connecting pipe; 32. Cover plate; 33. Filter screen; 34. Air guide seat; 4. Vibration damping assembly; 41. Clamp; 42. Fixing seat; 43. Vibration damper; 5. Connecting assembly; 51. Flange one; 52. Flange two; 53. Connecting bolts; 6. Connecting flange; 7. Sealing gasket. Detailed Implementation

[0034] 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.

[0035] Reference Figures 1-3 This utility model provides an embodiment of a device for noise reduction of a desulfurization oxidation blower, comprising an inlet pipe 1 and an inlet pipe 2. A connecting flange 6 is installed at the bottom of inlet pipe 1, which is connected to the air inlet end of the Roots blower via the connecting flange 6. External airflow enters the air inlet end of the Roots blower after passing through inlet pipe 1. Inlet pipe 1 smooths the incoming airflow, thereby reducing operating noise. A sealing gasket 7 is installed at the bottom of the connecting flange 6, with its bottom contacting the Roots blower, ensuring a sealed connection between inlet pipe 1 and the air inlet end of the Roots blower. Inlet pipe 2 is installed on top of inlet pipe 1 via a connecting assembly 5. Inlet pipe 1 and inlet pipe 2 can be installed and disassembled via the connecting assembly 5 for maintenance and replacement.

[0036] Reference Figure 1 , Figure 2 , Figure 3 and Figure 6 The intake pipe 1 includes an air inlet duct 11, which is fixedly connected to the top of the connecting flange 6. A sound-absorbing cylinder 12 is installed inside the air inlet duct 11 to absorb noise generated by the airflow movement inside the intake pipe 1, thereby reducing noise transmission. Multiple check rings 14 are installed inside the sound-absorbing cylinder 12. Air guided by the intake pipe 2 passes through the middle of the check rings 14 and enters the Roots blower. When the Roots blower is working, it pushes some of the airflow back. This pushed-back airflow stops moving due to the chamber formed by the check rings 14 and the sound-absorbing cylinder 12, and returns to the Roots blower along with the incoming airflow. This reduces airflow turbulence caused by the backflow, thereby reducing airflow noise and achieving noise reduction. The intake pipe 1 also includes a diverter net 13, which is fixedly connected inside the sound-absorbing tube 12 and is located above the check ring 14. The diverter net 13 divides the airflow entering from the intake pipe 2 into multiple parts. After the division, the airflow can be prevented from being too concentrated, thereby reducing airflow noise.

[0037] Reference Figures 2-4The second air intake pipe 2 includes a second air intake duct 21, which is installed on the upper part of the first air intake pipe 1. A second sound-absorbing cylinder 22 is fixedly connected inside the second air intake duct 21, and a spiral air guide strip 23 is installed on the inner wall of the second sound-absorbing cylinder 22. The airflow entering from the top of the second air intake pipe 2 is guided by the spiral air guide strip 23 and undergoes spiral motion inside the second air intake pipe 2, thereby guiding the airflow and reducing airflow turbulence. The noise generated during the airflow movement is absorbed by the second sound-absorbing cylinder 22 to reduce noise transmission. A shock-absorbing assembly 4 is installed on the outside of the second air intake pipe 2. The shock-absorbing assembly 4 includes a clamp 41, which is fixedly connected to the outside of the second air intake pipe 21. Multiple fixing seats 42 are fixedly connected to the outside of the clamp 41, and multiple anti-vibration hammers 43 are fixedly connected to the middle of the fixing seats 42. When the Roots blower is working, the second air intake pipe 2 will generate a small amount of vibration, which will affect the stability of the incoming airflow. By installing the shock-absorbing assembly 4 on the outside of the second air intake pipe 2, the vibration force of the second air intake pipe 2 can be transmitted outward and dissipated by the anti-vibration hammers 43, thus further ensuring the stability of the airflow.

[0038] Reference Figures 3-4 The lower surface of the first sound-absorbing cylinder 12 is lower than the lower surface of the first air inlet cylinder 11, and the lower surface of the second sound-absorbing cylinder 22 is lower than the lower surface of the second air inlet cylinder 21. The second sound-absorbing cylinder 22 and the second air inlet cylinder 21 are in contact. During assembly, the second air inlet cylinder 21 is inserted into the upper chamber of the first air inlet pipe 1. At this time, the second sound-absorbing cylinder 22 and the first sound-absorbing cylinder 12 are connected. After being connected by the connecting component 5, the sealing between the first air inlet pipe 1 and the second air inlet pipe 2 can be ensured, thereby avoiding internal airflow turbulence caused by sealing problems when the joint seam is on the same horizontal line.

[0039] Reference Figures 3-4 The connecting assembly 5 includes flange 1 51 and flange 2 52. Flange 1 51 is installed on the top of air inlet duct 1 11, and flange 2 52 is installed on the bottom of air inlet duct 2 21. Flange 2 52 and flange 1 51 are connected by connecting bolts 53. After connecting air inlet pipe 1 1 and air inlet pipe 2 2, flange 1 51 and flange 2 52 are connected by connecting bolts 53, thus completing the assembly of air inlet pipe 1 1 and air inlet pipe 2 2.

[0040] Reference Figures 3-5An air intake cover 3 is installed at the top of the second air intake pipe 2. The air intake cover 3 includes a connecting pipe 31, which is located at the top of the second air intake pipe 2. A cover plate 32 is fixedly connected to the top of the connecting pipe 31. A filter screen 33 is installed on the outside of the cover plate 32, and an air guide seat 34 is installed inside the cover plate 32. The air guide seat 34 is located in the upper part of the central cavity of the second air intake pipe 2. When the Roots blower is working, the external airflow enters through the filter screen 33 and then filters dust and impurities in the air through the filter screen 33. The filter screen 33 is placed at an angle to reduce clogging and ensure air intake. The air entering through the filter screen 33 is guided into the second air intake pipe 2 by the inner wall of the cover plate 32 and the air guide seat 34. The air guide seat 34 concentrates the external free airflow into a columnar airflow to ensure airflow stability and reduce noise during operation.

[0041] Working principle: This noise reduction device is installed on the outside of the air inlet pipe of the Roots blower via the connecting flange 6, and the sound-absorbing cylinder 12 is inserted into the air inlet pipe. When the Roots blower is working, the external airflow enters through the openings of the connecting pipe 31 and the cover plate 32, and is blocked by the filter screen 33, which filters out the dust in the air. The filtered air enters the interior of the air inlet cover 3 and is guided by the air guide seat 34 into the interior of the air inlet pipe 2. At this time, the air entering is guided by the air guide seat 34 and enters in a columnar shape. Then, it is guided by the spiral air guide strip 23 and generates a vortex inside the air inlet pipe 2. This reduces the air surge entering, thereby reducing the generation of noise.

[0042] Airflow entering from inside intake pipe 2 enters intake pipe 1 and is then divided into uniform air columns by the flow divider 13, further reducing airflow turbulence. After passing through the flow divider 13, the airflow passes sequentially through the middle of multiple check rings 14 and then enters the Roots blower from the bottom of intake pipe 1. The working shaft of the Roots blower compresses and transmits the air. During air compression, some air is squeezed and flows back towards intake pipe 1. The chamber formed by the check rings 14 and the sound absorber 12 blocks the backflowing airflow, preventing it from affecting the incoming airflow. This reduces airflow turbulence caused by backflow and further reduces noise during operation.

[0043] Finally, the noise generated during operation is absorbed by sound-absorbing cylinder 12 and sound-absorbing cylinder 22, thereby further reducing the transmission of noise and ensuring that the noise level of the desulfurization oxidation blower during operation meets production requirements.

[0044] Meanwhile, a vibration damping component 4 is installed on the outside of the second intake pipe 2. During the intake process of the Roots blower, the second intake pipe 2 will vibrate slightly. At this time, the vibration is transmitted through the anti-vibration hammer 43, thereby further reducing the vibration of the second intake pipe 2 and further reducing noise.

[0045] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present 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 the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for noise reduction of a desulfurization oxidation fan, comprising an inlet pipe one (1) and an inlet pipe two (2), characterized in that: The bottom of the first air inlet pipe (1) is equipped with a connecting flange (6), the first air inlet pipe (1) is installed at the air inlet end of the Roots blower through the connecting flange (6), the second air inlet pipe (2) is installed at the top of the first air inlet pipe (1) through the connecting assembly (5), and the top of the second air inlet pipe (2) is equipped with an air duct cover (3). The air intake cover (3) includes a connecting pipe (31), which is placed on the top of the second air intake pipe (2). A cover plate (32) is fixedly connected to the top of the connecting pipe (31). A filter screen (33) is installed on the outside of the cover plate (32). An air guide seat (34) is installed inside the cover plate (32). The air guide seat (34) is placed in the upper part of the central cavity of the second air intake pipe (2).

2. The device for noise reduction of desulfurization oxidation fans according to claim 1, characterized in that: The air inlet pipe (1) includes an air inlet duct (11), which is fixedly connected to the top of the connecting flange (6). A sound-absorbing cylinder (12) is installed inside the air inlet duct (11), and multiple check rings (14) are installed on the inner side of the sound-absorbing cylinder (12).

3. The device for noise reduction of desulfurization oxidation fans according to claim 2, characterized in that: The air intake pipe (1) also includes a diversion net (13), which is fixedly connected inside the sound-absorbing tube (12) and is located above the check ring (14).

4. The device for noise reduction of desulfurization oxidation fans according to claim 2, characterized in that: The second air intake pipe (2) includes a second air intake duct (21), which is installed on the upper part of the first air intake pipe (1). A second sound-absorbing duct (22) is fixedly connected inside the second air intake duct (21), and a spiral air guide strip (23) is installed on the inner wall of the second sound-absorbing duct (22).

5. The device for noise reduction of desulfurization oxidation fans according to claim 4, characterized in that: The connecting assembly (5) includes a first flange (51) and a second flange (52). The first flange (51) is installed on the top of the first air inlet duct (11), and the second flange (52) is installed on the bottom of the second air inlet duct (21). The second flange (52) and the first flange (51) are connected by connecting bolts (53).

6. The device for noise reduction of desulfurization oxidation fans according to claim 4, characterized in that: A shock-absorbing component (4) is installed on the outside of the second air intake pipe (2). The shock-absorbing component (4) includes a clamp (41). The clamp (41) is fixedly connected to the outside of the second air intake pipe (21). Multiple fixing seats (42) are fixedly connected to the outside of the clamp (41). Multiple anti-vibration hammers (43) are fixedly connected to the middle of the fixing seat (42).

7. The device for noise reduction of desulfurization oxidation fans according to claim 1, characterized in that: A sealing gasket (7) is installed at the bottom of the connecting flange (6), and the bottom of the sealing gasket (7) is in contact with the Roots blower.

8. The device for noise reduction of desulfurization oxidation fans according to claim 4, characterized in that: The lower surface of the first sound-absorbing cylinder (12) is lower than the lower surface of the first air inlet cylinder (11), the lower surface of the second sound-absorbing cylinder (22) is lower than the lower surface of the second air inlet cylinder (21), and the second sound-absorbing cylinder (22) and the second air inlet cylinder (21) are in contact with each other.

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