Boiler exhaust noise reduction device

Abstract

The utility model relates to the technical field of boiler exhaust, in particular to a boiler exhaust noise reduction device which comprises an inner pipeline, and a scattering mechanism is arranged in the inner pipeline. And the connecting pipes are symmetrically arranged outside the two ends of the inner pipeline. According to the utility model, the inner pipeline, the spoilers, the sound-absorbing plate and the salient points are matched for use, the channel is arranged into a snake-shaped structure through the spoilers in the inner pipeline, and the snake-shaped structure can increase the resistance of air flow, so that the air velocity is reduced, and the sound-absorbing effect is improved. The low wind speed can reduce friction between air and the pipeline wall and generation of vortexes, so that generation of wind flow noise is reduced, the sound absorption plate is further arranged on the outer wall of the spoiler and absorbs sound waves secondarily, the reflection mode of the sound waves on the surface of the sound absorption plate can be changed through the protruding points, and therefore scattering of the sound waves is achieved, and the noise reduction effect is achieved. Scattering of sound waves is beneficial to reduction of directional propagation of the sound waves, so that the sound field is more uniform, and residual noise is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of boiler exhaust, in particular to a boiler exhaust noise reduction device. Background Art

[0002] Boilers are common equipment in industrial and commercial places, but high-intensity noise may affect the health and safety of workers, such as causing hearing damage and increasing work pressure. Therefore, reducing boiler exhaust noise can help provide a safer and healthier working environment.

[0003] At present, the existing boiler exhaust noise reduction devices on the market usually install sound-absorbing cotton on the inner wall of the ventilation pipe to absorb sound waves and reduce the reflection and propagation of sound. However, the sound-absorbing cotton is mainly suitable for noise absorption in the medium and high frequency range. However, the noise generated by boiler exhaust is usually low-frequency noise, and the sound-absorbing cotton has limited effect on the absorption of low-frequency noise. Therefore, the use of sound-absorbing cotton alone cannot achieve the ideal noise reduction effect. Utility Model Content

[0004] The purpose of the utility model is to provide a boiler exhaust noise reduction device to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A boiler exhaust noise reduction device, comprising

[0007] An inner pipe, wherein a scattering mechanism is arranged inside the inner pipe;

[0008] A connecting pipe, the connecting pipe is symmetrically arranged outside the two ends of the inner pipe, the connecting pipe is connected to the inner pipe, and a sound absorbing mechanism is arranged inside the connecting pipe;

[0009] An inlet and an outlet, wherein the inlet is connected to one end of the inner pipe, and the outlet is connected to the other end of the inner pipe.

[0010] Preferably, the scattering mechanism includes spoilers, which are arranged on both sides of the inner wall of the inner pipe, and the spoilers on both sides are staggered and arranged to form a serpentine channel;

[0011] Preferably, the scattering mechanism further comprises a sound absorbing plate, and the sound absorbing plate is symmetrically arranged on the outer walls of both sides of the spoilers;

[0012] Preferably, a plurality of convex points are irregularly arranged on the outer wall of the sound absorbing board;

[0013] Preferably, the sound absorbing mechanism comprises sound absorbing cotton, the sound absorbing cotton is arranged on the inner wall of the connecting pipe, and the connecting pipe is provided with a fixing frame in an annular shape on the inner side of the sound absorbing cotton;

[0014] Preferably, an outer pipe is sleeved on the outer wall of the inner pipe, and a sound insulation pad is provided on the inner side of the outer pipe.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. A boiler exhaust noise reduction device is used in combination with an inner pipe, a spoiler, a sound-absorbing panel and convex points. Since the channel inside the inner pipe is set into a serpentine structure through a plurality of spoilers, the serpentine structure will increase the resistance to air flow, thereby slowing down the air flow rate. The lower wind speed will reduce the friction and eddy current between the air and the pipe wall, thereby reducing the generation of wind flow noise. The outer wall of the spoiler is also provided with a sound-absorbing panel, which absorbs sound waves for a second time, and the reflection mode of the sound waves on the surface of the sound-absorbing panel can be changed through the convex points, thereby realizing the scattering of the sound waves. The scattering of the sound waves helps to reduce the directional propagation of the sound waves, make the sound field more uniform, and reduce the residual noise.

[0017] 2. This boiler exhaust noise reduction device is used in conjunction with an inner pipe, an outer pipe and a sound insulation pad. The outer pipe is arranged outside the inner pipe, and a sound insulation pad is arranged between the inner pipe and the outer pipe, so that sound insulation can also be achieved from the outside of the inner pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall main structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the overall cross-sectional structure of the utility model;

[0020] Figure 3 For the utility model Figure 2 The enlarged schematic diagram at A in the middle;

[0021] Figure 4 For the utility model Figure 2 Enlarged schematic diagram of point B in the middle.

[0022] In the figure: 1. Inner pipe; 2. Connecting pipe; 3. Spoiler; 4. Sound-absorbing panel; 5. Bump; 6. Sound-absorbing cotton; 7. Fixing frame; 8. Outer pipe; 9. Sound insulation pad; 10. Inlet; 11. Outlet. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] like Figure 1-4 As shown, a technical solution provided by the utility model:

[0025] A boiler exhaust noise reduction device comprises an inner pipe 1, a scattering mechanism is arranged inside the inner pipe 1, the scattering mechanism comprises spoilers 3, the spoilers 3 are arranged on both sides of the inner wall of the inner pipe 1, the spoilers 3 on both sides are staggered and arranged to form a serpentine channel, the scattering mechanism also comprises sound absorbing panels 4, the sound absorbing panels 4 are symmetrically arranged on the outer walls of both sides of the spoilers 3, a plurality of convex points 5 are irregularly arranged on the outer walls of the sound absorbing panels 4, an inlet 10 and an outlet 11, the inlet 10 is connected to one end of the inner pipe 1, and the outlet 11 is connected to the other end of the inner pipe 1;

[0026] In this embodiment, since the channel is set into a serpentine structure inside the inner pipe 1 through a plurality of spoilers 3, the serpentine structure will increase the resistance to air flow, thereby slowing down the air flow rate. The lower wind speed will reduce the friction and eddy current between the air and the pipe wall, thereby reducing the generation of wind noise. In addition, the outer wall of the spoiler 3 is also provided with a sound-absorbing panel 4, which absorbs sound waves for a second time, and the reflection mode of the sound waves on the surface of the sound-absorbing panel 4 can be changed through the convex point 5, thereby realizing the scattering of the sound waves. The scattering of the sound waves helps to reduce the directional propagation of the sound waves, make the sound field more uniform, and reduce the residual noise.

[0027] like Figure 2 and Figure 3 As shown, the connecting pipe 2 is symmetrically arranged outside the two ends of the inner pipe 1, the connecting pipe 2 is connected to the inner pipe 1, a sound absorbing mechanism is arranged inside the connecting pipe 2, the sound absorbing mechanism includes sound absorbing cotton 6, the sound absorbing cotton 6 is arranged at the inner wall of the connecting pipe 2, and a fixing frame 7 is arranged in an annular manner on the inner side of the connecting pipe 2 located at the sound absorbing cotton 6;

[0028] In this embodiment, when the device is in use, the gas exhausted from the boiler enters from the inlet 10 after being filtered and cooled by other equipment. At this time, the sound-absorbing cotton 6 installed between the inner pipe 1 and the fixing frame 7 can absorb the energy of sound waves, reduce the reflection and propagation of sound, and thus reduce the noise level.

[0029] like Figure 3 As shown, an outer pipe 8 is sleeved on the outer wall of the inner pipe 1, and a sound insulation pad 9 is arranged on the inner side of the outer pipe 8;

[0030] In this embodiment, an outer pipe 8 is arranged outside the inner pipe 1 , and a sound insulation pad 9 is arranged between the inner pipe 1 and the outer pipe 8 , so that sound insulation can also be achieved from the outside of the inner pipe 1 .

[0031] Working principle: When the device is used, the gas discharged from the boiler enters from the inlet 10 after being filtered and cooled by other equipment. At this time, the sound-absorbing cotton 6 installed between the inner pipe 1 and the fixed frame 7 can absorb the energy of the sound wave, reduce the reflection and propagation of the sound, thereby reducing the noise level, and then enters the interior of the inner pipe 1. Since the channel is set into a serpentine structure through a number of spoilers 3 inside the inner pipe 1, the serpentine structure will increase the resistance to air flow, thereby slowing down the air flow rate. The lower wind speed will reduce the friction and eddy current between the air and the pipe wall, thereby reducing the generation of wind flow noise, and the outer wall of the spoiler 3 is also provided with a sound-absorbing plate 4, which absorbs the sound wave for the second time, and the convex point 5 can change the reflection mode of the sound wave on the surface of the sound-absorbing plate 4, thereby realizing the scattering of the sound wave. The scattering of the sound wave helps to reduce the directional propagation of the sound wave, make the sound field more uniform, and reduce the residual noise; at the same time, an outer pipe 8 is arranged outside the inner pipe 1, and a sound insulation pad 9 is arranged between the inner pipe 1 and the outer pipe 8, so that sound insulation can also be achieved from the outside of the inner pipe 1.

[0032] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A boiler exhaust noise reduction device, characterized in that: include An inner pipe (1), wherein a scattering mechanism is arranged inside the inner pipe (1); A connecting pipe (2), the connecting pipe (2) being symmetrically arranged outside the two ends of the inner pipe (1), the connecting pipe (2) being connected to the inner pipe (1), and a sound absorbing mechanism being arranged inside the connecting pipe (2); an inlet (10) and an outlet (11), wherein the inlet (10) is connected to one end of the inner pipe (1), and the outlet (11) is connected to the other end of the inner pipe (1); The scattering mechanism comprises a spoiler (3), wherein the spoiler (3) is arranged on both sides of the inner wall of the inner pipe (1), and the spoilers (3) on both sides are staggered and arranged to form a serpentine channel; The scattering mechanism further comprises a sound absorbing plate (4), wherein the sound absorbing plate (4) is symmetrically arranged on the outer walls of both sides of the plurality of spoilers (3).

2. A boiler exhaust noise reduction device according to claim 1, characterized in that: A plurality of protrusions (5) are irregularly arranged on the outer wall of the sound absorbing plate (4).

3. A boiler exhaust noise reduction device according to claim 1, characterized in that: The sound absorbing mechanism comprises sound absorbing cotton (6), the sound absorbing cotton (6) is arranged on the inner wall of the connecting pipe (2), and a fixing frame (7) is arranged in an annular shape on the inner side of the connecting pipe (2) and located inside the sound absorbing cotton (6).

4. A boiler exhaust noise reduction device according to claim 1, characterized in that: An outer pipe (8) is sleeved on the outer wall of the inner pipe (1), and a sound insulation pad (9) is arranged on the inner side of the outer pipe (8).

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