Noise reduction silencer and exhaust equipment
By designing multi-stage bent channels and sound-absorbing cotton structures in the reflection and pressure reduction zones, the problems of silencer blockage and poor noise reduction effect are solved, achieving efficient reduction of airflow noise and extension of equipment service life.
Patent Information
- Application Number
- CN202422485203.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-14
- Publication Date
- 2025-11-11
- Estimated Expiration
- 2034-10-14
AI Technical Summary
Existing silencers are prone to clogging during high-pressure airflow exhaust, resulting in poor noise reduction performance. Furthermore, traditional silencer methods are ineffective and cannot effectively reduce noise pollution.
Design a noise reduction silencer that includes a reflection zone and a pressure reduction zone. It uses a reflector and the inner wall of the reflection zone to reflect sound waves, and reduces airflow speed and noise through multi-stage bending channels and sound-absorbing cotton. It further reduces noise by combining a sound insulation plate with through holes.
It effectively extends the airflow path, reduces airflow speed and noise intensity, avoids harsh noise pollution caused by high-pressure airflow being discharged into the atmosphere at high speed, and improves the noise reduction effect and service life of the silencer.
Smart Images
Figure CN223539334U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of noise control equipment technology, and in particular to a noise reduction silencer and an exhaust device. Background Technology
[0002] During the exhaust process of pipes or valves, the rapid gas discharge can cause air vibration and may also cause equipment vibration, resulting in strong noise pollution. For example, the exhaust process of the solenoid valve, a control element of the cylinder of a packaging machine.
[0003] Current silencers typically employ methods such as reflection noise reduction, filler noise reduction, or pressure reduction noise reduction for sound silencing. While these methods are simple, their effectiveness is relatively poor. Pneumatic and vacuum silencers, due to high-speed airflow impact, water vapor permeation of sound-absorbing fillers, and environmental dust pollution, frequently become clogged. Once clogged, their noise reduction effect significantly deteriorates. Even after cleaning the clogged areas, repeated cleaning will noticeably reduce their noise reduction performance. Over time, this inevitably leads to increased investment costs.
[0004] Therefore, it is crucial to design a muffler with a simple structure and good noise reduction effect. Utility Model Content
[0005] The purpose of this invention is to provide a noise reduction silencer and exhaust equipment to solve the problems existing in the prior art. It can use the reflector and the inner wall of the reflector area to reflect sound waves, reduce sound wave energy, and also significantly reduce the pressure and flow rate of the high-pressure airflow, thus avoiding the generation of harsh noise pollution when the high-pressure airflow is discharged into the atmosphere at high speed.
[0006] To achieve the above objectives, this utility model provides the following solution:
[0007] A noise reduction muffler includes a noise reduction body, within which a reflective zone and a pressure reduction zone are disposed; the air inlet of the reflective zone is connected to an air inlet, and the air outlet of the reflective zone is connected to the air inlet of the pressure reduction zone; a reflective plate is disposed between the air inlet and the air outlet of the reflective zone, the reflective plate causing the channel within the reflective zone to bend; the air outlet of the pressure reduction zone is connected to an air outlet; and a sound-insulating disc with through holes is disposed within the pressure reduction zone to obstruct airflow.
[0008] As one embodiment, the reflection zone includes a first-level noise reduction chamber, a second-level noise reduction chamber, a third-level noise reduction chamber, a fourth-level noise reduction chamber, and a fifth-level noise reduction chamber connected in sequence; the channels in the first-level noise reduction chamber, the second-level noise reduction chamber, the third-level noise reduction chamber, the fourth-level noise reduction chamber, and the fifth-level noise reduction chamber are all curved.
[0009] In one embodiment, a partition is provided between the secondary noise reduction chamber and the primary noise reduction chamber, and the partition is provided with a through hole connecting the primary noise reduction chamber and the secondary noise reduction chamber; the air inlet and the partition are respectively located on two perpendicular walls in the primary noise reduction chamber.
[0010] As one embodiment, it also includes a first reflector and a second reflector, the first reflector being perpendicular to the partition, the second reflector being in a bent shape, and the end of the second reflector abutting against the outer wall of the primary noise reduction chamber. The outer wall of the primary noise reduction chamber and the area between the first reflector and the second reflector form the tertiary noise reduction chamber with a bent channel.
[0011] As one implementation, the intake and exhaust directions of the depressurization zone are opposite.
[0012] As one embodiment, the inner walls of the first-level noise reduction chamber, the second-level noise reduction chamber, the third-level noise reduction chamber, the fourth-level noise reduction chamber, the fifth-level noise reduction chamber, and the inner wall of the pressure reduction zone are all provided with sound-absorbing cotton; the wall surface of the partition facing the airflow direction, the two side walls of the first reflector, and the two side walls of the second reflector are all provided with the sound-absorbing cotton.
[0013] As one embodiment, the primary noise reduction chamber, the secondary noise reduction chamber, the tertiary noise reduction chamber, the quaternary noise reduction chamber, the quinary noise reduction chamber, the pressure reduction zone, the partition, the first reflector and the second reflector are all made of galvanized steel sheet, and the sound-absorbing cotton is applied to the surface of the galvanized steel sheet.
[0014] As one embodiment, the galvanized steel sheet has a thickness of 3mm to 5mm, and the sound-absorbing cotton is centrifugal glass wool.
[0015] As one embodiment, it also includes a mounting bracket connected to the noise reduction body, the mounting bracket being used to fix it to the exhaust equipment.
[0016] This utility model also provides an exhaust device, characterized in that the exhaust port of the exhaust device is connected to the air inlet of the above-mentioned noise reduction muffler.
[0017] This utility model has the following technical advantages over the prior art:
[0018] The noise reduction silencer of this utility model includes a reflection zone and a pressure reduction zone. The tortuous channel in the reflection zone not only prolongs the airflow path but also hinders the airflow to a certain extent, reducing the airflow speed. The reflector plate and the inner wall of the reflection zone can also reflect sound waves. The sound waves collide and cancel each other out under the reflection effect of the tortuous channel. After the airflow enters the pressure reduction zone, the pressure and velocity of the high-pressure airflow are significantly reduced under the obstruction effect of the sound insulation plate with through holes, avoiding the generation of harsh noise pollution when the high-pressure airflow is discharged into the atmosphere at high speed.
[0019] Other technical solutions in this utility model also have the following technical effects:
[0020] This invention applies sound-absorbing cotton to both the wall of the channel in the reflection zone and the inner wall of the pressure reduction zone. The fiber structure of the sound-absorbing cotton reduces sound wave energy, thereby further reducing noise pollution. Attached Figure Description
[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0022] Figure 1 This is a schematic diagram of the overall structure of the noise reduction silencer in one embodiment of the present invention;
[0023] Figure 2 This is a schematic diagram of the internal structure of a noise reduction silencer in one embodiment of the present invention;
[0024] Figure 3 for Figure 2 The front view.
[0025] Explanation of reference numerals in the attached figures:
[0026] 1. Air inlet; 2. Air outlet; 3. Primary noise reduction chamber; 4. Secondary noise reduction chamber; 5. Tertiary noise reduction chamber; 6. Quaternary noise reduction chamber; 7. Fifth noise reduction chamber; 8. Pressure reduction zone; 9. Sound insulation plate; 10. Partition; 11. First reflector; 12. Second reflector; 13. Sound-absorbing cotton; 14. Mounting bracket. Detailed Implementation
[0027] 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.
[0028] The purpose of this invention is to provide a noise reduction silencer and exhaust equipment to solve the problems existing in the prior art. It can use the reflector and the inner wall of the reflector area to reflect sound waves, reduce sound wave energy, and also significantly reduce the pressure and flow rate of the high-pressure airflow, thus avoiding the generation of harsh noise pollution when the high-pressure airflow is discharged into the atmosphere at high speed.
[0029] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0030] Example 1:
[0031] like Figures 1-3 As shown, this embodiment provides a noise reduction silencer, including a noise reduction body with an air inlet 1 and an air outlet 2. The noise reduction body contains a reflective zone and a pressure reduction zone 8. The air inlet of the reflective zone is connected to the air inlet 1, and the air outlet of the reflective zone is connected to the air inlet of the pressure reduction zone 8. A reflective plate is provided between the air inlet and air outlet of the reflective zone, causing the channel within the reflective zone to bend. One end of the pressure reduction zone 8 is connected to the air outlet of the reflective zone, and the other end is connected to the air outlet 2. A sound-insulating disc 9 with through holes is provided within the pressure reduction zone 8 to block airflow. The sound-insulating disc 9 can be perpendicular to the airflow direction or inclined relative to the airflow direction.
[0032] When the high-pressure airflow enters the reflection zone from the inlet 1, the tortuous channel in the reflection zone not only prolongs the airflow path but also hinders the airflow, reducing the airflow speed. The reflector and the inner wall of the reflection zone can also reflect the sound waves. The sound waves collide and cancel each other out under the reflection effect of the tortuous channel. After the airflow enters the depressurization zone 8, the pressure and velocity of the high-pressure airflow are significantly reduced under the obstruction of the sound insulation plate 9 with through holes, avoiding the generation of harsh noise pollution when the high-pressure airflow is discharged into the atmosphere at high speed.
[0033] In this embodiment, the dimensions of the air inlet 1, the air outlet 2, the airflow channel, and the through hole on the sound insulation plate 9 can all be set according to the actual application scenario to adapt to different models of exhaust equipment.
[0034] In one embodiment, the reflection zone includes a primary noise reduction chamber 3, a secondary noise reduction chamber 4, a tertiary noise reduction chamber 5, a quaternary noise reduction chamber 6, and a quinary noise reduction chamber 7 connected sequentially. The channels in the primary noise reduction chamber 3, secondary noise reduction chamber 4, tertiary noise reduction chamber 5, quaternary noise reduction chamber 6, and quinary noise reduction chamber 7 are all bends. The reflection of sound waves by the multi-stage noise reduction chambers significantly reduces noise intensity. A partition 10 is provided between the secondary noise reduction chamber 4 and the primary noise reduction chamber 3, and the partition 10 has through holes connecting the primary noise reduction chamber 3 and the secondary noise reduction chamber 4. The air inlet 1 and the partition 10 are located on two perpendicular walls in the primary noise reduction chamber 3. The air intake direction of the secondary noise reduction chamber 4 is opposite to the air outlet direction; the air intake direction of the tertiary noise reduction chamber 5 is also opposite to the air outlet direction; the air intake direction of the quaternary noise reduction chamber 6 has an angle of not less than 90° with the air outlet direction. In this embodiment, the airflow channels in the multiple noise reduction chambers are connected in a serpentine shape, which can improve the sound wave reflection effect.
[0035] To ensure the noise reduction body has a regular shape, the airflow direction within the noise reduction body, except for the air intake direction of the primary noise reduction chamber 3, is all within one dimension. In other words, if a coordinate system is established with the air intake direction of the primary noise reduction chamber 3 as the Z-axis and X-axis and Y-axis perpendicular to the Z-axis, then the airflow direction in the reflection zone and the pressure reduction zone 8, except for the air intake direction of the primary noise reduction chamber 3, is all within the XY plane.
[0036] As one embodiment, this embodiment also includes a first reflector 11 and a second reflector 12. The first reflector 11 is perpendicular to the partition 10. The second reflector 12 is bent and can be L-shaped. The end of the second reflector 12 abuts against the outer wall of the first-stage noise reduction chamber 3. The area between the outer wall of the first-stage noise reduction chamber 3, the first reflector 11 and the second reflector 12 forms a third-stage noise reduction chamber 5 with a bent channel.
[0037] To ensure that the pressure reduction zone 8 also has a certain reflective effect, in this embodiment, the air intake direction and exhaust direction of the pressure reduction zone 8 are opposite. The wall surface of the pressure reduction zone 8 can reflect sound waves.
[0038] As one implementation, sound-absorbing cotton 13 is provided on the inner walls of the primary noise reduction chamber 3, the secondary noise reduction chamber 4, the tertiary noise reduction chamber 5, the quaternary noise reduction chamber 6, the quinary noise reduction chamber 7, and the pressure reduction zone 8; sound-absorbing cotton 13 is also provided on the wall surface of the partition 10 facing the airflow direction, the two side walls of the first reflector 11, and the two side walls of the second reflector 12. Of course, it is also feasible to provide sound-absorbing cotton 13 on the other side wall of the partition 10. Furthermore, the sound-absorbing cotton 13 on the partition 10 also has corresponding through holes. The internal fiber structure of the sound-absorbing cotton 13 has a strong reflective effect on sound waves. Sound wave energy is superimposed and collided in the pores of the fiber structure, and the sound energy is converted into heat energy and consumed. The sound-absorbing cotton 13 can be made of centrifugal glass wool.
[0039] In one embodiment, the primary noise reduction chamber 3, the secondary noise reduction chamber 4, the tertiary noise reduction chamber 5, the quaternary noise reduction chamber 6, the quinary noise reduction chamber 7, the pressure reduction zone 8, the partition 10, the first reflector 11, and the second reflector 12 are all made of galvanized steel sheet, and the surface of the galvanized steel sheet is covered with sound-absorbing cotton 13. The thickness of the galvanized steel sheet is 3mm to 5mm.
[0040] As one embodiment, it also includes a mounting bracket 14 connected to the noise reduction body, which is used to fix it to the exhaust equipment. In this embodiment, the mounting bracket 14 can be an angle iron or other suitable structural form for the exhaust equipment. For example, when the muffler is mounted on the exhaust pipe, the mounting bracket 14 can be a clamp structure.
[0041] Example 2:
[0042] This embodiment provides an exhaust device, the exhaust port of which is connected to the air inlet 1 of the aforementioned noise reduction muffler. The exhaust device can be a blower, and the noise reduction muffler can be installed on the blower's vent pipe; the exhaust device can also be a device with a cylinder, such as a packaging machine, and the noise reduction muffler can be installed on the exhaust pipe of the cylinder's exhaust valve.
[0043] Any adaptive changes made according to actual needs are within the protection scope of this utility model.
[0044] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.
Claims
1. A noise reduction silencer, characterized in that, It includes a noise reduction body, which is provided with a reflection area and a voltage reduction area. The air inlet of the reflective zone is connected to the air inlet, and the air outlet of the reflective zone is connected to the air inlet of the pressure reduction zone; a reflective plate is provided between the air inlet and the air outlet of the reflective zone, and the reflective plate makes the channel in the reflective zone bend. The exhaust end of the pressure reduction zone is connected to the air outlet; the pressure reduction zone is equipped with a sound insulation disc with through holes that blocks the airflow.
2. The noise reduction silencer according to claim 1, characterized in that, The reflection zone includes a first-level noise reduction chamber, a second-level noise reduction chamber, a third-level noise reduction chamber, a fourth-level noise reduction chamber, and a fifth-level noise reduction chamber connected in sequence; the channels in the first-level noise reduction chamber, the second-level noise reduction chamber, the third-level noise reduction chamber, the fourth-level noise reduction chamber, and the fifth-level noise reduction chamber are all curved.
3. The noise reduction silencer according to claim 2, characterized in that, A partition is provided between the secondary noise reduction chamber and the primary noise reduction chamber, and the partition is provided with a through hole connecting the primary noise reduction chamber and the secondary noise reduction chamber; the air inlet and the partition are respectively located on two perpendicular walls in the primary noise reduction chamber.
4. The noise reduction silencer according to claim 3, characterized in that, It also includes a first reflector and a second reflector. The first reflector is perpendicular to the partition, and the second reflector is bent. The end of the second reflector abuts against the outer wall of the first-stage noise reduction chamber. The outer wall of the first-stage noise reduction chamber and the area between the first reflector and the second reflector form the third-stage noise reduction chamber with a bent channel.
5. The noise reduction silencer according to claim 4, characterized in that, The intake and exhaust directions of the depressurization zone are opposite.
6. The noise reduction silencer according to claim 5, characterized in that, The inner walls of the first-level noise reduction chamber, the second-level noise reduction chamber, the third-level noise reduction chamber, the fourth-level noise reduction chamber, the fifth-level noise reduction chamber, and the inner wall of the pressure reduction zone are all provided with sound-absorbing cotton; the walls of the partition facing the airflow direction, the two side walls of the first reflector, and the two side walls of the second reflector are all provided with the sound-absorbing cotton.
7. The noise reduction silencer according to claim 6, characterized in that, The first-level noise reduction chamber, the second-level noise reduction chamber, the third-level noise reduction chamber, the fourth-level noise reduction chamber, the fifth-level noise reduction chamber, the pressure reduction zone, the partition, the first reflector and the second reflector are all made of galvanized steel sheet, and the sound-absorbing cotton is applied to the surface of the galvanized steel sheet.
8. The noise reduction silencer according to claim 7, characterized in that, The galvanized steel sheet has a thickness of 3mm to 5mm, and the sound-absorbing cotton is centrifugal glass wool.
9. The noise reduction silencer according to claim 1, characterized in that, It also includes a mounting bracket connected to the noise reduction body, the mounting bracket being used to fix it to the exhaust equipment.
10. An exhaust device, characterized in that, The exhaust port of the exhaust device is connected to the air inlet of the noise reduction muffler as described in any one of claims 1 to 9.