CN212342262U - Novel metal casing silencer - Google Patents
Novel metal casing silencer Download PDFInfo
- Publication number
- CN212342262U CN212342262U CN202020857842.XU CN202020857842U CN212342262U CN 212342262 U CN212342262 U CN 212342262U CN 202020857842 U CN202020857842 U CN 202020857842U CN 212342262 U CN212342262 U CN 212342262U
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- noise elimination
- damping piece
- noise
- muffler
- rows
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Abstract
The utility model discloses a novel metal casing silencer, including shell and noise damping piece, the noise damping piece is provided with two rows and more than two rows, every row the parallel interval arrangement of air current direction is followed to the axis of noise damping piece, and is adjacent two rows be interrupted between the noise damping piece and set up to parallel staggered arrangement, it is adjacent noise damping piece thickness is unequal, the shell includes air intake and air outlet, the noise damping piece is close to the position of air intake is provided with toper water conservancy diversion structure, the noise damping piece is close to the position of air outlet is provided with dodges the portion, the shell includes the armor perforated plate, glass silk cloth, acoustic absorber and the metal level that set gradually from inside to outside. The utility model discloses simple structure effectively reduces airflow channel and link up the width, all has higher noise elimination volume on whole wide band, and noise elimination effect is good.
Description
Technical Field
The utility model relates to a silencer technical field, concretely relates to novel metal casing silencer.
Background
A ventilation muffler, referred to simply as a muffler, is an acoustic device that prevents sound from propagating while allowing airflow to pass through. In the places where low background noise is required to be kept and the influence of external noise is blocked, and in the places with high noise, silencers are required to be arranged for preventing the influence of noise on the surrounding environment and ventilating. The silencer is widely applied to building acoustics and noise control engineering. The mufflers are of various types, and the muffling mechanism is resistive muffling, reactive muffling, impedance composite muffling and the like.
For example, for places such as offices, markets, hotels or laboratories with quiet and comfortable requirements, especially for ventilation air-conditioning pipeline systems of star hotels and high-class office buildings, noise elimination is often required, wherein most commonly, a resistive sheet type muffler is added in the pipeline system, and the muffler has the characteristic of simple structure, but has the defects that the noise elimination effect on low-frequency noise is not ideal, the existence of sheet type intervals can generate high-frequency failure, and meanwhile, when airflow flows out from an outlet of the sheet type muffler, turbulence can be generated in an inner cavity close to the outlet, and the generated turbulence can generate noise again, so that the noise elimination effect of the sheet type muffler is poor.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a novel metal casing silencer, simple structure effectively reduces airflow channel and link up the width, all has higher noise elimination volume on whole wide band, and noise elimination effect is good.
In order to solve the technical problem, the utility model provides a novel metal casing silencer, including shell and noise elimination piece, the noise elimination piece is provided with two rows and more than two rows, every row the parallel interval arrangement of air current direction is followed to the axis of noise elimination piece, and is adjacent two rows be interrupted between the noise elimination piece and set up to parallel staggered arrangement, it is adjacent noise elimination piece thickness is unequal, the shell includes air intake and air outlet, the noise elimination piece is close to the position of air intake is provided with toper water conservancy diversion structure, the noise elimination piece is close to the position of air outlet is provided with dodges the portion, the shell includes armor perforated plate, glass silk cloth, acoustic absorber and the metal level that sets gradually from inside to outside.
Furthermore, the silencing sheet is a perforated galvanized plate or a perforated aluminum plate, a porous sound absorption material of centrifugal glass wool and a sound absorption plate made of light steel keels.
Furthermore, each side of the silencing piece is provided with an inwards concave V-shaped groove along the airflow direction.
Furthermore, the two ends of the shell are provided with conical end sockets.
Further, the conical flow guide structure comprises a windward portion and an inclined portion connected with the windward portion, and the inclined portion has a set inclination angle relative to the extending direction of the silencing piece.
Furthermore, a PVC weather-resistant film or a polyethylene film is arranged on the face guard perforated plate, so that the moisture resistance and the waterproof performance of the face guard perforated plate can be enhanced.
The utility model has the advantages that: 1. the silencer rows and the silencer rows are arranged in parallel at intervals, so that the through width of an airflow channel can be effectively reduced, high-frequency failure is avoided, the silencing effect is improved, and the silencer is simple in structure;
2. the adjacent silencers have different thicknesses, compact structure, small occupied space and low manufacturing cost, have higher noise elimination amount in the whole broadband, have good noise reduction effect and are particularly suitable for the noise elimination treatment of a ventilation air-conditioning system with higher requirement on the sound environment quality;
3. the arrangement of the avoiding part can prevent air flow from generating turbulence in the inner cavity, and reduce noise generated again due to the turbulence, so that the noise elimination effect of the sheet type silencer is better.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a schematic view of the structure of the housing of the present invention.
Fig. 3 is a cross-sectional view of the noise reduction sheet of the present invention.
The reference numbers in the figures illustrate: 1. a housing; 11. a protective face perforated plate; 12. glass fiber cloth; 13. a sound absorbing layer; 14. a metal layer; 2. a sound-deadening sheet; 3. an air inlet; 4. an air outlet; 5. a conical flow guide structure; 51. a windward portion; 52. an inclined portion; 6. an avoidance part; 7. a V-shaped groove; 8. and (5) a conical end socket.
Detailed Description
The present invention is further described with reference to the following drawings and specific embodiments so that those skilled in the art can better understand the present invention and can implement the present invention, but the embodiments are not to be construed as limiting the present invention.
Referring to fig. 1 to 3, the utility model discloses a novel metal casing silencer's an embodiment, including shell 1 and noise damping piece 2, noise damping piece 2 is provided with two rows and more than two rows, the parallel interval arrangement of air current direction is followed to the axis of every row of noise damping piece 2, be interrupted between two adjacent rows of noise damping pieces 2 and set up, and parallel staggered arrangement, adjacent noise damping piece 2 thickness varies, shell 1 includes air intake 3 and air outlet 4, noise damping piece 2 is close to the position of air intake 3 and is provided with toper water conservancy diversion structure 5, noise damping piece 2 is close to the position of air outlet 4 and is provided with dodges portion 6, the thickness of dodging portion 6 is less than noise damping piece 2's thickness, shell 1 includes the armor perforated plate 11 that sets gradually from inside to outside, glass silk cloth 12, sound absorbing layer 13 and metal level 14.
The air flow enters from the air inlet 3, and the silencing quantity is determined because of the continuous silencing channel. If the same length is interrupted and set up, the discontinuity of piece formula sound absorbing material can form new sound field medium in the noise elimination passageway, the sound wave constantly advances new sound field medium, the sound wave can produce refractions once more, the noise elimination that enables the silencer is further improved, and 2 uneven thickness of noise elimination piece, compact structure, small occupied space, low in manufacturing cost, all have higher noise reduction volume on whole wide band, noise reduction effect is good, be particularly useful for the noise elimination processing of the ventilation air conditioning system that requires higher to sound environment quality, and the air current is when being about to reach air outlet 4, dodge 6 set up and can prevent that the air current from producing the torrent in the inner chamber, reduce the noise because of the torrent produces once more, make the noise elimination effect of piece formula silencer better.
The silencing sheet 2 is a perforated galvanized plate or a perforated aluminum plate and a porous sound absorption material of centrifugal glass wool and a sound absorption plate made of light steel keels, and has a good sound absorption effect.
Each side of the silencing piece 2 is provided with the V-shaped groove 7 of indent along the air current direction, improves the area of contact of silencing piece 2 and air current, has improved noise elimination effect, and 1 both ends of shell all are provided with toper head 8, and is easy to assemble, is equipped with the resistant membrane of waiting of PVC or polyethylene film on the armor perforated plate 11, can strengthen 11 dampproofing, the waterproof performance of armor perforated plate.
The conical flow guide structure 5 comprises a windward part 51 and an inclined part 52 connected with the windward part 51, the inclined part 52 has a set inclined angle relative to the extending direction of the silencing sheet 2, and airflow enters the inner cavity of the shell 1 from the air inlet 3 and firstly collides with a windward surface; after the airflow collides with the windward side, the airflow rebounds to the inner wall of the shell 1, and after the airflow rebounds, the airflow continues to move to the air outlet 4 between the side wall of the silencing piece 2 and the inner wall of the shell 1 (or between the side wall of the other silencing piece 2); the air current collides with the inclined part 52, and after rebounding, the air current continues to move to the air outlet 4 between the side wall of the silencing piece 2 and the inner wall of the shell 1 (or between the side wall of another silencing piece 2), so that the moving path of the air current is increased, although the windward side and the inclined surface have approximately the same function, the resistance of the air current entering the inner cavity of the silencer can be reduced by arranging the inclined surface, the sheet type silencer is also suitable for occasions with small air flow, namely, is suitable for an air current output part with small power, and has wider application range.
The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. Equivalent substitutes or changes made by the technical personnel in the technical field on the basis of the utility model are all within the protection scope of the utility model. The protection scope of the present invention is subject to the claims.
Claims (6)
1. The utility model provides a novel metal casing silencer, a serial communication port, including shell and noise elimination piece, the noise elimination piece is provided with two rows and more than two rows, every row the parallel interval arrangement of air current direction is followed to the axis of noise elimination piece, and adjacent two rows be interrupted between the noise elimination piece and set up to parallel staggered arrangement, it is adjacent noise elimination piece thickness is unequal, the shell includes air intake and air outlet, the noise elimination piece is close to the position of air intake is provided with toper water conservancy diversion structure, the noise elimination piece is close to the position of air outlet is provided with dodges the portion, the thickness of dodging the portion is less than the thickness of noise elimination piece, the shell includes the armor perforated plate, glass silk cloth, acoustic absorption layer and the metal level that sets gradually from inside to outside.
2. The muffler of claim 1, wherein the muffler plate is made of perforated galvanized sheet or perforated aluminum sheet, porous sound absorbing material of centrifugal glass wool, and light steel keel.
3. The muffler of claim 1, wherein each side of the muffler plate is provided with a V-shaped groove along the airflow direction.
4. The new metal shell muffler of claim 1, wherein the shell is provided with a conical head at both ends.
5. The muffler of claim 1, wherein the tapered flow-guiding structure comprises a windward portion and an inclined portion connected to the windward portion, the inclined portion having a predetermined inclination angle with respect to an extending direction of the muffling sheet.
6. The muffler with metal shell as recited in claim 1, wherein a PVC weather-resistant film or a polyethylene film is provided on the facing perforated plate to enhance the moisture-proof and waterproof performance of the facing perforated plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020857842.XU CN212342262U (en) | 2020-05-21 | 2020-05-21 | Novel metal casing silencer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020857842.XU CN212342262U (en) | 2020-05-21 | 2020-05-21 | Novel metal casing silencer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212342262U true CN212342262U (en) | 2021-01-12 |
Family
ID=74083683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020857842.XU Active CN212342262U (en) | 2020-05-21 | 2020-05-21 | Novel metal casing silencer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212342262U (en) |
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2020
- 2020-05-21 CN CN202020857842.XU patent/CN212342262U/en active Active
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