CN116576325A - Muffler for ventilating duct - Google Patents
Muffler for ventilating duct Download PDFInfo
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- CN116576325A CN116576325A CN202310859943.9A CN202310859943A CN116576325A CN 116576325 A CN116576325 A CN 116576325A CN 202310859943 A CN202310859943 A CN 202310859943A CN 116576325 A CN116576325 A CN 116576325A
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- 238000010521 absorption reaction Methods 0.000 claims abstract description 50
- 239000004745 nonwoven fabric Substances 0.000 claims abstract description 44
- 230000008030 elimination Effects 0.000 claims abstract description 23
- 238000003379 elimination reaction Methods 0.000 claims abstract description 23
- 239000011521 glass Substances 0.000 claims abstract description 19
- 230000007246 mechanism Effects 0.000 claims abstract description 19
- 229920000742 Cotton Polymers 0.000 claims abstract description 18
- 230000030279 gene silencing Effects 0.000 claims description 20
- 239000011491 glass wool Substances 0.000 claims description 13
- 229910001335 Galvanized steel Inorganic materials 0.000 claims description 6
- 239000008397 galvanized steel Substances 0.000 claims description 6
- 238000009423 ventilation Methods 0.000 claims description 5
- 230000003584 silencer Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 17
- 238000007664 blowing Methods 0.000 abstract description 3
- 238000005253 cladding Methods 0.000 abstract 1
- 230000009467 reduction Effects 0.000 description 20
- 238000004519 manufacturing process Methods 0.000 description 15
- 238000009826 distribution Methods 0.000 description 14
- 238000012545 processing Methods 0.000 description 10
- 230000009471 action Effects 0.000 description 7
- 238000013461 design Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000001743 silencing effect Effects 0.000 description 6
- 238000012423 maintenance Methods 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 239000011358 absorbing material Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000007480 spreading Effects 0.000 description 2
- 238000003892 spreading Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/02—Energy absorbers; Noise absorbers
- F16L55/033—Noise absorbers
- F16L55/0336—Noise absorbers by means of sound-absorbing materials
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/02—Energy absorbers; Noise absorbers
- F16L55/033—Noise absorbers
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Exhaust Silencers (AREA)
- Duct Arrangements (AREA)
Abstract
The invention provides a ventilating duct muffler, and relates to the technical field of air duct mufflers. The ventilating duct muffler comprises a main pipe body, wherein one end of the main pipe body is an air inlet, the other end of the main pipe body is an air outlet, the outer sides of the air inlet and the air outlet are respectively fixedly connected with a first connecting flange and a second connecting flange, and connecting holes are formed in corners of the first connecting flange and the second connecting flange; the center fixedly connected with inner shell of the body of being responsible for, a plurality of evenly distributed's casing sound absorption hole have been seted up to the week side of inner shell, the outer wall week side cladding of inner shell has the casing non-woven fabrics layer, it has the casing to inhale sound glass cotton layer to fill between casing non-woven fabrics layer and the body inner wall of being responsible for. Through designing noise elimination mechanism, noise elimination mechanism cooperation is responsible for the air current that the body can be to blowing in and play better vortex and guide effect for the air current can stay more time in being responsible for the body, thereby can realize better sound absorption and fall the function of making an uproar, work efficiency improves greatly.
Description
Technical Field
The invention belongs to the technical field of air pipe mufflers, and particularly relates to a ventilating duct muffler.
Background
The silencer for ventilating duct is also called static pressure box, which is a device capable of allowing air flow to pass through and effectively preventing or weakening sound energy from spreading outwards, is a necessary accessory for reducing dynamic pressure, increasing static pressure, stabilizing air flow and reducing air flow vibration, can prevent sound from spreading and allow air flow to pass through, and can be used for reducing noise, obtaining uniform static pressure air outlet and reducing dynamic pressure loss.
Various types of ventilating duct silencers exist in the market at present, but the structural design of most of the ventilating duct silencers is too simple, and the existing ventilating duct silencers are provided with sound-absorbing structures on the inner wall of a main pipe body, so that the existing ventilating duct silencers have certain sound-absorbing and silencing effects, but have limited silencing effects and generally only can reduce 15-20 dB of noise; at present, a plurality of honeycomb-shaped or grid-shaped guide plates are arranged in the ventilating duct muffler, and though the sound elimination effect can be further enhanced, the structural design is often too complex, the time and the labor are wasted in the actual production and processing process, the production and processing period is greatly prolonged, the production and processing efficiency is not improved, and secondly, the time for the air flow to stay in the main pipe body is limited due to the fact that the turbulence structure is not provided, the sound absorption is not facilitated, and the sound elimination and noise reduction effects of the ventilating duct muffler still have a larger lifting space.
Disclosure of Invention
The present invention is directed to a muffler for a ventilation duct, which solves the above-mentioned problems of the related art.
The technical scheme adopted for solving the technical problems is as follows: the ventilating duct muffler comprises a main pipe body, wherein one end of the main pipe body is an air inlet, the other end of the main pipe body is an air outlet, the outer sides of the air inlet and the air outlet are respectively fixedly connected with a first connecting flange and a second connecting flange, and connecting holes are formed in corners of the first connecting flange and the second connecting flange;
the center of the main pipe body is fixedly connected with an inner shell, a plurality of evenly distributed shell sound absorption holes are formed in the periphery of the inner shell, a shell non-woven fabric layer is coated on the periphery of the outer wall of the inner shell, the shell non-woven fabric layer is matched with the plurality of shell sound absorption holes, so that better sound absorption effect can be achieved, sound can enter the shell sound absorption glass cotton layer conveniently through the shell sound absorption holes and the shell non-woven fabric layer, the shell sound absorption glass cotton layer is filled between the shell non-woven fabric layer and the inner wall of the main pipe body, and better sound absorption and noise elimination effects can be achieved in the main pipe body through the shell sound absorption glass cotton layer filled between the shell non-woven fabric layer and the inner wall of the main pipe body;
the inner wall of the inner shell is fixedly connected with a silencing mechanism.
Preferably, the main pipe body, the first connecting flange, the second connecting flange and the inner shell are all made of galvanized steel plates.
Through above-mentioned technical scheme, the main body, first flange, second flange and the interior casing that are made by galvanized steel sheet material not only sound construction is stable, and is also cleaner, sanitary simultaneously, the daily clean maintenance of being convenient for.
Preferably, the inner housing is welded to the main tube.
Through above-mentioned technical scheme, can guarantee the fastness and the stability of connection, its structure is also simpler simultaneously.
Preferably, the noise elimination mechanism is a first noise elimination structure, the first noise elimination structure includes a plurality of first vertical deflectors and a plurality of first horizontal deflectors, a plurality of evenly distributed's first sound absorption holes have all been seted up to the outer wall of first vertical deflectors and first horizontal deflectors, a plurality of the inboard of first vertical deflectors and first horizontal deflectors has all bonded first nonwoven cloth layer, the inboard on first nonwoven cloth layer is filled with first sound absorbing glass cotton layer, a plurality of first vertical deflectors and a plurality of first horizontal deflectors.
Through the technical scheme, after the air flow enters the main pipe body through the air inlet, the plurality of first vertical guide plates can split the entering air flow, so that the air flow passes through gaps among the plurality of first vertical guide plates, a plurality of uniformly distributed first sound absorption holes are formed in the plurality of first vertical guide plates, and the inner sides of the plurality of first vertical guide plates are also provided with the first non-woven fabric layer and the first sound absorption glass wool layer, so that noise generated by the passing air flow can be absorbed, and preliminary noise reduction and noise reduction are realized; after the air flow passes through the plurality of first vertical guide plates, the air flow after noise reduction can continuously pass through the plurality of uniformly distributed first horizontal guide plates, and the inner sides of the plurality of first horizontal guide plates are also provided with a first non-woven fabric layer and a first sound-absorbing glass cotton layer, so that the air flow can be subjected to sound absorption and noise reduction again, and the air flow is divided into uniform multi-strand small air flows, so that better noise reduction effect is realized, and the air flow after noise reduction can be discharged outwards through an air outlet.
Preferably, the plurality of first vertical deflectors are vertically fixed on one side of the inner wall of the inner shell, which is close to the air inlet, and the plurality of first horizontal deflectors are horizontally fixed on one side of the inner wall of the inner shell, which is close to the air outlet.
Through above-mentioned technical scheme, through being fixed in the inboard of inner housing air intake and air outlet respectively with a plurality of first vertical guide plates and a plurality of first horizontal guide plates, compare in traditional latticed or cellular amortization structure, this kind of overall arrangement design can realize same amortization effect, also is convenient for fast production and processing simultaneously, has saved a large amount of production and processing time, has simplified production technology.
Preferably, a plurality of the first vertical deflectors and a plurality of the first horizontal deflectors are distributed in a cross-shaped structure.
Through above-mentioned technical scheme, wholly be a plurality of first vertical guide plates and a plurality of first horizontal guide plates that the style of calligraphy structure distributes can play better sound effect of making an uproar that falls in inhaling the air current that passes for the air current can contact with better sound absorbing material, thereby realizes better amortization effect.
Preferably, the noise elimination mechanism is a second noise elimination structure, the second noise elimination structure includes first air inlet guide plate and second air inlet guide plate, first air inlet guide plate and second air inlet guide plate are fixed in the one side that the inner wall front and back end is close to the air intake respectively, the central point put fixedly connected with central division board of inner shell, the inner wall front and back end is close to central point put fixedly connected with first air-out guide plate and second air-out guide plate respectively, the one side fixedly connected with a plurality of evenly distributed's of inner wall front and back end is close to the air outlet second perpendicular guide plate, first air inlet guide plate, second air inlet guide plate, central division board, first air-out guide plate, second air-out guide plate and a plurality of second perpendicular guide plate's outer wall all offer a plurality of evenly distributed's second sound absorbing holes, first air inlet guide plate, second air inlet guide plate, central division board, first air-out guide plate, second air-out guide plate and a plurality of second perpendicular guide plate's inner wall bonding has the second non-woven fabrics sound absorbing layer of second glass.
Through the technical scheme, after the air flow of the air supply system enters the inner shell through the air inlet, the first air inlet guide plate and the second air inlet guide plate can guide the blown air flow to the central flow dividing plate, the air flow enters the channel of the inner shell, which is close to the inner wall, under the action of the central flow dividing plate, after the air flow passes through the channel, the air flow flows towards the central flow dividing plate again under the guiding action of the first air outlet guide plate and the second air outlet guide plate, finally the air flow uniformly blows to the plurality of second vertical guide plates under the flow dividing action of the central flow dividing plate, finally the air flow passes through gaps among the plurality of second vertical guide plates and then flows out through the air outlet, and the inner walls of the first air inlet guide plate, the second air inlet guide plate, the central flow dividing plate, the first air outlet guide plate, the second air outlet guide plate and the plurality of second vertical guide plates are all provided with the second non-woven fabric layer and the second glass cotton layer, so that the air flow passing through can be better in sound absorption and noise reduction, and the finally blown air flow is more uniform and the wind noise is lower.
Preferably, the central flow dividing plate is integrally designed in a cross-shaped structure.
Through above-mentioned technical scheme, wholly be cross structural design's central splitter plate can play the reposition of redundant personnel effect to the air current of blowing in, also can play the guide effect to the air current after the reposition of redundant personnel simultaneously for the air current after inhaling the sound through reposition of redundant personnel can evenly blow to a plurality of evenly distributed's second air-out guide plate.
Preferably, the noise elimination mechanism is a third noise elimination structure, the third noise elimination structure includes top guide plate and bottom guide plate, the top guide plate is fixed in one side that the inner wall top of the inner shell is close to the air intake, the bottom guide plate is fixed in inner wall bottom center of the inner shell, one side fixedly connected with a plurality of evenly distributed's third perpendicular guide plate that the inner wall front and back end is close to the air outlet in the inner shell, a plurality of evenly distributed's third sound absorption holes have all been seted up to the outer wall of top guide plate, bottom guide plate and a plurality of third perpendicular guide plate, the inner wall of top guide plate, bottom guide plate and a plurality of third perpendicular guide plate has all bonded the third non-woven fabrics layer, third non-woven fabrics inboard is filled and is had the third sound absorbing glass cotton layer.
Through the technical scheme, after the air flow in the air supply system enters the inner shell through the air inlet, the air flow can blow to the bottom guide plate under the guide effect of the top guide plate, the air flow is guided by the turbulent flow of the bottom guide plate and then flows to the inner side of the top guide plate, the air flow is blown to a plurality of uniformly distributed third vertical guide plates under the guide of the inner side of the top guide plate, finally the air flow flows out through the air outlet after passing through gaps among the plurality of third vertical guide plates, and as a plurality of uniformly distributed third sound absorption holes are formed in the outer walls of the top guide plate, the bottom guide plate and the plurality of third vertical guide plates, the inner walls of the third sound absorption holes are bonded with a third non-woven fabric layer, and the third sound absorption glass wool layer is filled in the third non-woven fabric layer, so that the air flow passing through can have a better sound absorption and noise reduction effect, and finally the blown air flow is more uniform and the wind noise is lower.
Preferably, the top deflector and the bottom deflector are distributed in a central symmetry manner.
Through above-mentioned technical scheme, be the top guide plate and the bottom guide plate that central symmetry distributes can play better vortex and guide effect to the air current of blowing in for the air current can stay more time in being responsible for the body, thereby can realize better sound absorption and fall the function of making an uproar.
The beneficial effects of the invention are as follows: (1) According to the invention, the simple flow guiding structure and the silencing structure are designed in the main pipe body, so that the silencing effect can be further enhanced, and meanwhile, the actual production and processing process is more time-saving and labor-saving, the production and processing period is greatly shortened, and the production and processing efficiency is greatly improved; (2) Compared with the traditional grid-shaped or honeycomb-shaped silencing structure, the novel silencing structure has the advantages that the layout design can achieve the same silencing effect, is more convenient for rapid production and processing, saves a large amount of production and processing time, and simplifies the production process; (3) According to the invention, by designing the silencing mechanism, the silencing mechanism is matched with the main pipe body, so that better turbulence and guiding effects can be achieved on the blown air flow, so that the air flow can stay for more time in the main pipe body, better sound absorption and noise reduction functions can be realized, and the working efficiency is greatly improved.
Drawings
FIG. 1 is a first view angle structure diagram of a first embodiment of the present invention;
FIG. 2 is a diagram showing a second view angle structure according to the first embodiment of the present invention;
FIG. 3 is a front view of a first embodiment of the present invention;
FIG. 4 is a right side view of a first embodiment of the present invention;
FIG. 5 is a cross-sectional view taken along line A-A of FIG. 3;
FIG. 6 is a cross-sectional view taken along B-B in FIG. 3;
FIG. 7 is a diagram showing a first view angle structure according to a second embodiment of the present invention;
FIG. 8 is a diagram showing a second view angle structure according to a second embodiment of the present invention;
fig. 9 is a front view of a second embodiment of the present invention;
FIG. 10 is a cross-sectional view taken along line C-C of FIG. 9;
FIG. 11 is an enlarged view of a portion of FIG. 10 at A;
FIG. 12 is a first view angle block diagram of a third embodiment of the present invention;
FIG. 13 is a diagram showing a second view angle structure of a third embodiment of the present invention;
FIG. 14 is a right side view of a third embodiment of the present invention;
fig. 15 is a sectional view taken along the direction D-D in fig. 14.
Wherein, 1, a main pipe body; 2. a first connection flange; 3. a second connection flange; 4. a connection hole; 5. an inner housing; 6. a housing sound absorption hole; 7. a shell non-woven fabric layer; 8. the shell is provided with a sound-absorbing glass wool layer; 9. a sound damping mechanism; 91. a first sound attenuating structure; 911. a first vertical deflector; 912. a first horizontal deflector; 913. a first sound absorption hole; 914. a first nonwoven layer; 915. a first sound absorbing glass wool layer; 92. a second sound attenuating structure; 921. a first air intake baffle; 922. a second air inlet guide plate; 923. a central splitter plate; 924. the first air outlet guide plate; 925. the second air outlet guide plate; 926. a second vertical deflector; 927. a second sound absorption hole; 928. a second nonwoven layer; 929. a second sound-absorbing glass wool layer; 93. a third sound attenuating structure; 931. a top baffle; 932. a bottom deflector; 933. a third vertical deflector; 934. a third sound absorption hole; 935. a third nonwoven fabric layer; 936. and a third sound-absorbing glass wool layer.
Detailed Description
The following description of the embodiments of the present invention 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 invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Embodiment one: as shown in fig. 1-6, an embodiment of the present invention provides a ventilation pipe muffler, which includes a main pipe body 1, one end of the main pipe body 1 is an air inlet, the other end is an air outlet, the outer sides of the air inlet and the air outlet are fixedly connected with a first connecting flange 2 and a second connecting flange 3 respectively, corners of the first connecting flange 2 and the second connecting flange 3 are provided with connecting holes 4, and the first connecting flange 2 and the second connecting flange 3 can be connected with a pipe of an air supply system through fixing bolts.
As shown in fig. 2, the inner shell 5 is fixedly connected to the center of the main pipe body 1, the inner shell 5 is fixedly welded to the main pipe body 1, so that the connection firmness and stability can be ensured, the structure is simpler, the main pipe body 1, the first connecting flange 2, the second connecting flange 3 and the inner shell 5 are made of galvanized steel plates, and the main pipe body 1, the first connecting flange 2, the second connecting flange 3 and the inner shell 5 are made of galvanized steel plates, so that the structure is firm and stable, and the structure is cleaner and sanitary, and is convenient for daily cleaning and maintenance.
As shown in fig. 5, a plurality of evenly distributed shell sound absorbing holes 6 are formed in the peripheral side of the inner shell 5, a shell non-woven fabric layer 7 is wrapped on the peripheral side of the outer wall of the inner shell 5, the shell non-woven fabric layer 7 is matched with the plurality of shell sound absorbing holes 6, a better sound absorbing effect can be achieved, meanwhile sound can enter the shell sound absorbing glass cotton layer 8 through the shell sound absorbing holes 6 and the shell non-woven fabric layer 7 conveniently, the shell sound absorbing glass cotton layer 8 is filled between the shell non-woven fabric layer 7 and the inner wall of the main pipe body 1, and the shell sound absorbing glass cotton layer 8 is filled between the shell non-woven fabric layer 7 and the inner wall of the main pipe body 1, so that better sound absorbing and silencing effects can be achieved in the main pipe body 1.
As shown in fig. 5-6, the inner wall of the inner shell 5 is fixedly connected with a silencing mechanism 9, the silencing mechanism 9 is a first silencing structure 91, the first silencing structure 91 comprises a plurality of first vertical guide plates 911 and a plurality of first horizontal guide plates 912, a plurality of uniformly distributed first sound absorption holes 913 are formed in the outer walls of the plurality of first vertical guide plates 911 and the plurality of first horizontal guide plates 912, the inner sides of the plurality of first vertical guide plates 911 and the inner sides of the plurality of first horizontal guide plates 912 are adhered with a first nonwoven fabric layer 914, the inner sides of the first nonwoven fabric layer 914 are filled with a first sound absorption glass wool layer 915, the plurality of first vertical guide plates 911 and the plurality of first horizontal guide plates 912 are vertically fixed on one side, close to the air inlet, of the inner shell 5, the plurality of first horizontal guide plates 912 are horizontally fixed on one side, close to the air outlet, and compared with the traditional grid-shaped or honeycomb-shaped silencing structure, the inner side of the inner shell 5 is also simplified in structure, the same mass production process is realized, the production process is greatly shortened, and the production time is shortened.
The plurality of first vertical deflectors 911 and the plurality of first horizontal deflectors 912 are distributed in a cross-shaped structure, and the plurality of first vertical deflectors 911 and the plurality of first horizontal deflectors 912 which are distributed in a cross-shaped structure as a whole can play a better role in absorbing sound and reducing noise on the passing airflow, so that the airflow can be contacted with a better sound absorbing material, and a better silencing effect is achieved.
When the air flow enters the main pipe body 1 through the air inlet, the plurality of first vertical guide plates 911 can split the air flow so that the air flow passes through gaps among the plurality of first vertical guide plates 911, a plurality of first sound absorption holes 913 which are uniformly distributed are formed in the plurality of first vertical guide plates 911, and a first nonwoven fabric layer 914 and a first sound absorption glass cotton layer 915 are further arranged on the inner side of the plurality of first vertical guide plates 911, so that noise generated by the air flow passing through the air flow can be absorbed, and preliminary noise reduction is realized; after the air flow passes through the plurality of first vertical deflectors 911, the air flow after noise reduction will continue to pass through the plurality of uniformly distributed first horizontal deflectors 912, and the inner sides of the plurality of first horizontal deflectors 912 are also provided with the first nonwoven fabric layers 914 and the first sound-absorbing glass wool layers 915, so that the air flow can be again subjected to sound absorption and noise reduction, and the air flow is divided into uniform multi-strand small air flows, so that better noise reduction effect is achieved, and the air flow after noise reduction is discharged outwards through the air outlet.
Embodiment two: as shown in fig. 7 to 11, the present embodiment is different from the first embodiment in that: the silencing mechanism 9 is a second silencing structure 92, the second silencing structure 92 comprises a first air inlet guide plate 921 and a second air inlet guide plate 922, the first air inlet guide plate 921 and the second air inlet guide plate 922 are respectively fixed on one side of the inner wall of the inner shell 5, which is close to the air inlet, the central position of the inner shell 5 is fixedly connected with a central splitter plate 923, the front end and the rear end of the inner wall of the inner shell 5 are respectively fixedly connected with a first air outlet guide plate 924 and a second air outlet guide plate 925, one side of the front end and the rear end of the inner wall of the inner shell 5, which is close to the air outlet, is fixedly connected with a plurality of uniformly distributed second vertical guide plates 926, the outer walls of the first air inlet guide plate 921, the second air inlet guide plate 922, the central splitter plate 923, the first air outlet guide plate 924, the second air outlet guide plate 925 and the plurality of second vertical guide plates 926 are respectively provided with a plurality of uniformly distributed second sound absorption holes 927, the first air inlet guide plate 921, the second air inlet guide plate 922, the central guide plate 923, the first air outlet guide plate 924, the second air outlet guide plate 925 and the inner walls of the plurality of second vertical guide plates 926 are adhered with the second non-woven fabric layer 928, the second sound absorbing glass wool layer 929 is filled in the inner side of the second non-woven fabric layer 928, the central guide plate 923 is integrally in a cross-shaped structural design, the central guide plate 923 integrally in the cross-shaped structural design can split the blown air flow, and meanwhile, the split air flow can also guide the split air flow, so that the split and sound-absorbed air flow can be uniformly blown to the plurality of second air outlet guide plates 925, after the air flow of the air supply system enters the inner shell 5 through the air inlets, the first air inlet guide plate 921 and the second air inlet guide plate 922 can guide the blown air flow to the central guide plate 923, the air flow enters the channel of the inner shell 5 close to the inner wall under the action of the central flow distribution plate 923, after passing through the channel, the air flow flows towards the central flow distribution plate 923 again under the guiding action of the first air outlet flow distribution plate 924 and the second air outlet flow distribution plate 925, finally, under the flow distribution action of the central flow distribution plate 923, the air flow uniformly blows to the plurality of second vertical flow distribution plates 926, finally, the air flow passes through gaps among the plurality of second vertical flow distribution plates 926 and then flows out through the air outlet, and the inner walls of the first air inlet flow distribution plate 921, the second air inlet flow distribution plate 922, the central flow distribution plate 923, the first air outlet flow distribution plate 924, the second air outlet flow distribution plate 925 and the plurality of second vertical flow distribution plates 926 are all provided with the second non-woven fabric layer 928 and the second sound absorbing glass wool layer 929, so that the passing air flow can be better absorbed and noise reduced, and finally blown air flow is more uniform and the air noise is lower.
Embodiment III: as shown in fig. 12 to 15, the present embodiment is different from the first embodiment in that: the silencing mechanism 9 is a third silencing structure 93, the third silencing structure 93 comprises a top deflector 931 and a bottom deflector 932, the top deflector 931 and the bottom deflector 932 are distributed in a central symmetry manner, the top deflector 931 and the bottom deflector 932 distributed in the central symmetry manner can play a better role in turbulence and guiding the blown air flow, so that the air flow can stay in the main pipe body 1 for more time, thereby realizing a better sound absorption and noise reduction function, the top deflector 931 is fixed on one side of the inner wall top of the inner shell 5, which is close to the air inlet, the bottom deflector 932 is fixed on the bottom center of the inner wall of the inner shell 5, a plurality of uniformly distributed third vertical deflectors 933 are fixedly connected on one side of the front end and the rear end of the inner wall of the inner shell 5, which is close to the air outlet, a plurality of uniformly distributed third sound absorption holes 934 are formed on the outer walls of the top deflector 931, the bottom deflector 932 and the plurality of third vertical deflectors 933, the inner walls of the top deflector 931, the bottom deflector 932 and the plurality of third vertical deflectors 933 are adhered with a third non-woven fabric layer 935, the inner side of the third non-woven fabric layer 935 is filled with a third sound absorbing glass wool layer 936, after the air flow in the air supply system enters the inner housing 5 through the air inlet, the air flow is blown to the bottom deflector 932 under the guiding action of the top deflector 931, the air flow is guided by the turbulence of the bottom deflector 932 and then flows to the inner side of the top deflector 931, the air flow is guided by the inner side of the top deflector 931 and then blown to the plurality of uniformly distributed third vertical deflectors 933, finally the air flow flows out through the air outlet after passing through gaps among the plurality of third vertical deflectors 933, as the outer walls of the top deflector 931, the bottom deflector 932 and the plurality of third vertical deflectors 933 are all provided with a plurality of uniformly distributed third sound absorbing holes 934, and the inner walls of the air flow are adhered with the third non-woven fabric layer 935, the third non-woven fabric layer 935 is filled with the third sound-absorbing glass wool layer 936, thereby playing a better role in sound absorption and noise reduction for the air flow passing through, and making the air flow blown out at last more uniform and lower in wind noise.
Working principle: the first connecting flange 2 and the second connecting flange 3 are connected with a pipeline of an air supply system through a plurality of groups of fixing bolts, the main pipe body 1, the first connecting flange 2, the second connecting flange 3 and the inner shell 5 which are made of galvanized steel plates are firm and stable in structure, meanwhile, the novel air supply pipe is cleaner and sanitary, daily cleaning and maintenance are facilitated, the plurality of evenly distributed shell sound absorption holes 6 are formed in the periphery of the inner shell 5, the shell non-woven fabric layer 7 is coated on the periphery of the outer wall of the inner shell 5, the shell sound absorption glass cotton layer 8 is filled between the shell non-woven fabric layer 7 and the inner wall of the main pipe body 1, the silencing mechanism 9 is fixedly connected with the inner wall of the inner shell 5, after air flows enter the main pipe body 1 through the air inlet, the air flow noise can enter the shell sound absorption glass cotton layer 8 through the shell sound absorption holes 6 and the shell non-woven fabric layer 7, the silencing mechanism 9 is matched with the shell sound absorption holes 6, the shell non-woven fabric layer 7 and the shell glass cotton layer 8 can play a better sound absorption and noise reduction role on the air flow which passes through, the air flow blown out finally is more uniform, the air flow is lower in noise reduction and can play a better sound absorption and noise reduction role in the main pipe body 1.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A ventilation duct muffler comprising a main pipe body (1), characterized in that: one end of the main pipe body (1) is an air inlet, the other end of the main pipe body is an air outlet, the outer sides of the air inlet and the air outlet are fixedly connected with a first connecting flange (2) and a second connecting flange (3) respectively, and connecting holes (4) are formed in corners of the first connecting flange (2) and the second connecting flange (3);
the sound absorption device is characterized in that an inner shell (5) is fixedly connected to the center of the main pipe body (1), a plurality of shell sound absorption holes (6) which are uniformly distributed are formed in the periphery of the inner shell (5), a shell non-woven fabric layer (7) is coated on the periphery of the outer wall of the inner shell (5), and a shell sound absorption glass cotton layer (8) is filled between the shell non-woven fabric layer (7) and the inner wall of the main pipe body (1);
the inner wall of the inner shell (5) is fixedly connected with a silencing mechanism (9).
2. A ventilating duct muffler according to claim 1, wherein: the main pipe body (1), the first connecting flange (2), the second connecting flange (3) and the inner shell (5) are made of galvanized steel plates.
3. A ventilating duct muffler as defined in claim 2, wherein: the inner shell (5) is welded and fixed with the main pipe body (1).
4. A ventilating duct muffler according to claim 1, wherein: the noise elimination mechanism (9) is a first noise elimination structure (91), the first noise elimination structure (91) comprises a plurality of first vertical guide plates (911) and a plurality of first horizontal guide plates (912), a plurality of first sound absorption holes (913) which are uniformly distributed are formed in the outer walls of the first vertical guide plates (911) and the first horizontal guide plates (912), a plurality of first non-woven fabric layers (914) are adhered to the inner sides of the first vertical guide plates (911) and the inner sides of the first horizontal guide plates (912), and a first sound absorption glass cotton layer (915) is filled in the inner sides of the first non-woven fabric layers (914).
5. A ventilation duct silencer as claimed in claim 4, wherein: the plurality of first vertical guide plates (911) are vertically fixed on one side, close to the air inlet, of the inner wall of the inner shell (5), and the plurality of first horizontal guide plates (912) are horizontally fixed on one side, close to the air outlet, of the inner wall of the inner shell (5).
6. A ventilation duct silencer as claimed in claim 5, wherein: the plurality of first vertical guide plates (911) and the plurality of first horizontal guide plates (912) are distributed in a cross-shaped structure.
7. A ventilating duct muffler according to claim 1, wherein: the noise elimination mechanism (9) is a second noise elimination structure (92), the second noise elimination structure (92) comprises a first air inlet guide plate (921) and a second air inlet guide plate (922), the first air inlet guide plate (921) and the second air inlet guide plate (922) are respectively fixed on one side, close to an air inlet, of the front end and the rear end of the inner wall of the inner shell (5), a central splitter plate (923) is fixedly connected to the central position of the inner shell (5), a first air outlet guide plate (924) and a second air outlet guide plate (925) are respectively fixedly connected to the front end and the rear end of the inner wall of the inner shell (5) close to the central position, a plurality of second vertical guide plates (926) are fixedly connected to one side, close to an air outlet, of the first air inlet guide plate (921), the second air inlet guide plate (922), the central splitter plate (923), the second air outlet guide plate (925) and the outer walls of a plurality of second vertical guide plates (926) are respectively provided with a plurality of evenly distributed second air outlet guide plates (924), a plurality of second air inlet guide plates (927), a second air inlet guide plates (926), a plurality of air inlet guide plates (923) are respectively bonded with a plurality of second air inlet guide plates (9220), the inner side of the second non-woven fabric layer (928) is filled with a second sound-absorbing glass wool layer (929).
8. A ventilating duct muffler according to claim 7, wherein: the central splitter plate (923) is integrally designed in a cross-shaped structure.
9. A ventilating duct muffler according to claim 1, wherein: the noise elimination mechanism (9) is third noise elimination structure (93), third noise elimination structure (93) include top guide plate (931) and bottom guide plate (932), one side that is close to the air intake at top guide plate (931) are fixed in interior casing (5) inner wall top, bottom guide plate (932) are fixed in interior casing (5) inner wall bottom center, one side fixedly connected with a plurality of evenly distributed's third perpendicular guide plate (933) of inner wall front and back end near the air outlet, a plurality of evenly distributed's third sound absorption hole (934) have all been seted up to the outer wall of top guide plate (931), bottom guide plate (932) and a plurality of third perpendicular guide plate (933), the inner wall of top guide plate (931), bottom guide plate (932) and a plurality of third perpendicular guide plate (933) all bonds third non-woven fabrics layer (935), third non-woven fabrics layer (935) inboard is filled has third sound absorption glass cotton layer (936).
10. A ventilating duct muffler according to claim 9, wherein: the top deflector (931) and the bottom deflector (932) are distributed in a central symmetry manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310859943.9A CN116576325A (en) | 2023-07-13 | 2023-07-13 | Muffler for ventilating duct |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310859943.9A CN116576325A (en) | 2023-07-13 | 2023-07-13 | Muffler for ventilating duct |
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| CN116576325A true CN116576325A (en) | 2023-08-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202310859943.9A Pending CN116576325A (en) | 2023-07-13 | 2023-07-13 | Muffler for ventilating duct |
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Application publication date: 20230811 |
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