CN220065169U - Composite silencer - Google Patents

Abstract

The utility model discloses a composite silencer, and belongs to the technical field of silencers. The composite silencer comprises a shell, wherein at least two groups of silencing frames are arranged in the shell, each silencing frame is C-shaped, the interior of each silencing frame is hollow and filled with sound-absorbing cotton, silencing holes are formed in each silencing frame and are communicated with the inner cavity of the silencing frame, and each group of silencing frames are linearly arranged from top to bottom; according to the utility model, the sound wave in the air flow can be reflected back and forth in the reflecting cavity, the sound wave is consumed in reflection, the resonance cavity is arranged to enable the resonance tube I and the resonance tube II to generate resonance, the resonance of the resonance tube I and the resonance tube II are mutually offset through the resonance of the resonance tube II, so that noise is reduced, the air flow enters from the opening at one side of the shell, passes through two-stage silencing, and exits from the opening at the other side, and a better silencing effect is achieved under the condition of not increasing the volume.

Description

Composite silencer

Technical Field

The utility model relates to the technical field of silencers, in particular to a composite silencer.

Background

The silencer is an important measure for eliminating aerodynamic noise by preventing sound transmission and allowing air flow to pass through, and is often installed on an air flow channel of aerodynamic equipment (such as an air blower, an air compressor, a boiler exhaust port, an electric generator, a water pump and other equipment with high noise at the exhaust port) or in a noise reducing device in an air inlet and exhaust system.

The utility model provides a muffler for nitrogen making machine based on publication number CN217933159U, includes the muffler barrel, and the top of muffler barrel is provided with the inlet end, and the end connection of inlet end has the intake pipe, and the bottom of muffler barrel is provided with the end of giving vent to anger, and the tip of giving vent to anger the end is provided with flange, the inside of muffler barrel is provided with functional module, and gas can not take place to leak easily when carrying.

The device carries out the amortization through setting up the amortization cotton in the barrel, and the amortization cotton has certain amortization effect, but to reach good amortization effect, just needs the length of extension barrel, increases the time that the noise passes through the amortization cotton to reach good amortization effect, but if increase the length of barrel, just cause the muffler volume too big, be inconvenient for installation transportation.

Disclosure of Invention

The utility model aims to solve the problem that the volume and the silencing effect of a silencer in the prior art are not good.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the utility model provides a compound muffler, includes the casing, the inside of casing is provided with two at least groups amortization frames, every amortization frame all is the C word form, every the inside cavity of amortization frame just fills has the sound absorption cotton, every all seted up the amortization hole on the amortization frame, and the amortization hole is linked together with the inner chamber of amortization frame, and every group amortization frame is linear arrangement from top to bottom, adjacent two in every group form the reflection chamber between the amortization frame, sound is at reflection intracavity round trip reflection.

Preferably, the inside fixedly connected with two division boards of casing, and two division boards form resonant cavity and form the amortization chamber in the casing both sides at the casing middle part, be provided with resonance pipe two and resonance pipe one respectively in the resonant cavity, resonance pipe two and resonance pipe one twine coincide together, evenly distributed's aperture has all been seted up on resonance pipe one and the resonance pipe two, the both ends of resonance pipe two and resonance pipe one are fixed respectively and are linked together the bellows, and the bellows runs through two division boards respectively and is linked together with the amortization chamber of casing both sides.

Preferably, the outer parts of the second resonance tube and the first resonance tube are fixedly sleeved with rubber sleeves matched with the second resonance tube and the first resonance tube.

Preferably, the resonant cavity of the shell is fixedly connected with a guide post, the second resonant tube and the first resonant tube are spirally wound outside the guide post, the two ends of the guide post are slidably connected with connecting plates, the first resonant tube and the second resonant tube are located between the two connecting plates, springs are sleeved at the two ends of the guide post, and the two ends of the springs are connected with the shell and the connecting plates respectively.

Preferably, the inner wall of the shell and the surface of the partition plate are both provided with spherical protrusions.

Preferably, the openings on two sides of the shell are all detachably provided with filter cloth.

Compared with the prior art, the utility model provides the composite silencer which has the following beneficial effects.

1. According to the utility model, the silencing cavity is arranged, sound waves in the air flow enter the inner cavity of the silencing frame through the silencing holes on the silencing frame in the silencing cavity and are absorbed by the sound absorbing cotton in the silencing frame, so that the noise is reduced, and the C-shaped silencing frame can enable the sound waves in the air flow to be reflected back and forth in the reflecting cavity, so that the sound waves are consumed in reflection, and the silencing effect is better.

2. The utility model is provided with the resonant cavity at the same time, air flow enters the resonant tube II and the resonant tube I through the corrugated tube, impacts the inner walls of the resonant tube I and the resonant tube II, the resonant tube I and the resonant tube II which are spirally wound are closely contacted with each other, so that the resonant tube I and the resonant tube II generate resonance, the resonance of the resonant tube I and the resonant tube II are mutually counteracted by the resonance of the other side, the noise is further reduced, the small hole between the resonant tube II and the resonant tube I can move high-frequency sound waves to an ultrasonic range insensitive to human ears, the air flow enters from one side opening of the shell, passes through two-stage silencing, and exits from the other side opening, and a better silencing effect is achieved under the condition of not increasing the volume.

Drawings

Fig. 1 is a schematic perspective view of the present utility model.

Fig. 2 is a schematic diagram of the internal structure of the present utility model.

Fig. 3 is an enlarged schematic view of the structure a in fig. 2 according to the present utility model.

In the figure:

1. a housing; 2. a filter cloth; 3. spherical protrusions; 4. a guide post; 5. a spring; 6. a connecting plate; 7. a partition plate; 8. a sound attenuation frame; 9. sound absorbing cotton; 10. a bellows; 11. a first resonance tube; 12. a rubber sleeve; 13. a second resonance tube; 14. a reflective cavity; 15. and the silencing hole.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

Referring to fig. 1 to 3, a composite muffler includes a housing 1, in which openings at both sides of the housing 1 are detachably provided with a filter cloth 2, an opening end of the housing 1 is mounted on an air flow passage of an aerodynamic device in a sealing manner, the filter cloth 2 is mounted at the opening of the housing 1 by bolts, an air flow passing through the housing 1 can be filtered, dust contained in the air flow is intercepted, and the filter cloth 2 can be detached to clean the filter cloth 2 used for a long time, two partition plates 7 are fixedly connected inside the housing 1, and the two partition plates 7 form a resonance cavity in the middle of the housing 1 and a silencing cavity at both sides of the housing 1.

The inside of casing 1 is provided with two at least groups of amortization frame 8, casing 1 and amortization frame 8 all adopt combined material aluminum alloy to make, the quality is lighter, be convenient for transport installation, amortization frame 8 is located the amortization intracavity, every amortization frame 8 all is C word form, every amortization frame 8 inside cavity just is filled with and inhale the sound cotton 9, amortization hole 15 has all been seted up on every amortization frame 8, and amortization hole 15 is linked together with the inner chamber of amortization frame 8, every group amortization frame 8 is linear arrangement from top to bottom, form reflection cavity 14 between two adjacent amortization frames 8 in every group, the sound wave in the air current gets into in the amortization frame 8 inner chamber through the amortization hole 15 on the amortization frame 8, and be inhaled by inhaling the sound cotton 9 in the amortization frame 8, reduce noise, and C word form amortization frame 8, sound wave in the air current is in reflection cavity 14 back and forth reflection, sound wave is consumed in the reflection, the amortization effect is better.

The two ends of the resonance tube I13 and the resonance tube II 11 are fixedly communicated with the corrugated tube 10 respectively, the corrugated tube 10 penetrates through the two partition plates 7 respectively and is communicated with the silencing cavities on two sides of the shell 1, the resonance tube II 13 and the resonance tube I11 are wound and anastomosed together, small holes which are uniformly distributed are formed in the resonance tube I11 and the resonance tube II 13, air flow enters the resonance tube II 13 and the resonance tube I11 through the corrugated tube 10 and impinges on the inner walls of the resonance tube I11 and the resonance tube II 13, the spiral wound resonance tube I11 and the resonance tube II 13 are tightly contacted with each other, resonance is generated between the resonance tube I11 and the resonance tube II 13, resonance of each other is counteracted, noise is further reduced, and small holes between the resonance tube II 13 and the resonance tube I11 can move high-frequency sound waves to an ultrasonic range insensitive to human ears.

The outside of resonance pipe two 13 and resonance pipe one 11 is fixed the cover and is equipped with the rubber sleeve 12 with resonance pipe two 13 and resonance pipe one 11 looks adaptation, and rubber sleeve 12 cushions the resonance of resonance pipe one 11 and resonance pipe two 13, has offered the through-hole corresponding with resonance pipe one 11 and resonance pipe two 13 apertures on the rubber sleeve 12 simultaneously, prevents under the circumstances that does not influence the amortization effect that resonance pipe one 11 and resonance pipe two 13 striking produced the noise.

The resonant cavity fixedly connected with guide post 4 of casing 1, and resonance pipe two 13 and resonance pipe one 11 spiral winding are outside guide post 4, the equal sliding connection in both ends of guide post 4 has connecting plate 6, resonance pipe one 11 and resonance pipe two 13 are located between two connecting plates 6, resonance pipe one 11 and resonance pipe two 13 are close to the one end and the connecting plate 6 fixed connection of connecting plate 6, the both ends of guide post 4 all overlap and are equipped with spring 5, and the both ends of spring 5 are connected with casing 1 and connecting plate 6 respectively, two connecting plates 6 support resonance pipe one 11 and resonance pipe two 13 under the effect of guide post 4 in compression state, the inner wall of casing 1 and the surface of division board 7 all are provided with globular protruding 3, globular protruding 3's setting can increase the reflection point of acoustic wave, the amortization effect is better.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.

Claims (6)

1. The utility model provides a compound muffler, includes casing (1), its characterized in that, the inside of casing (1) is provided with two at least groups amortization frame (8), every amortization frame (8) all are C word form, every the inside cavity of amortization frame (8) just is filled with and inhales sound cotton (9), every amortization hole (15) have all been seted up on amortization frame (8), and amortization hole (15) are linked together with the inner chamber of amortization frame (8), and every group amortization frame (8) are linear arrangement from last to down, adjacent two in every group between amortization frame (8) form reflection chamber (14), sound is at reflection chamber (14) internal reflection back and forth.

2. The composite silencer according to claim 1, wherein two partition plates (7) are fixedly connected inside the shell (1), two partition plates (7) form a resonant cavity in the middle of the shell (1) and form silencing cavities at two sides of the shell (1), a resonant tube two (13) and a resonant tube one (11) are respectively arranged in the resonant cavity, the resonant tube two (13) and the resonant tube one (11) are wound and anastomosed together, small holes which are uniformly distributed are formed in the resonant tube one (11) and the resonant tube two (13), corrugated tubes (10) are fixedly communicated with two ends of the resonant tube two (13) and two ends of the resonant tube one (11) respectively, and the corrugated tubes (10) penetrate through the two partition plates (7) respectively and are communicated with the silencing cavities at two sides of the shell (1).

3. The composite silencer according to claim 2, wherein the outer parts of the second resonance tube (13) and the first resonance tube (11) are fixedly sleeved with rubber sleeves (12) matched with the second resonance tube (13) and the first resonance tube (11).

4. A composite muffler according to claim 3, characterized in that the resonant cavity of the housing (1) is fixedly connected with a guide post (4), the second resonant tube (13) and the first resonant tube (11) are spirally wound outside the guide post (4), two ends of the guide post (4) are slidably connected with connecting plates (6), the first resonant tube (11) and the second resonant tube (13) are located between the two connecting plates (6), two ends of the guide post (4) are sleeved with springs (5), and two ends of the springs (5) are connected with the housing (1) and the connecting plates (6) respectively.

5. A composite muffler according to claim 2, characterized in that the inner wall of the housing (1) and the surface of the partition plate (7) are both provided with spherical protrusions (3).

6. A composite muffler according to claim 1, wherein the openings on both sides of the housing (1) are detachably fitted with filter cloths (2).