CN212155281U - Noise elimination device for tunnel fan - Google Patents
Noise elimination device for tunnel fan Download PDFInfo
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- CN212155281U CN212155281U CN202020702545.8U CN202020702545U CN212155281U CN 212155281 U CN212155281 U CN 212155281U CN 202020702545 U CN202020702545 U CN 202020702545U CN 212155281 U CN212155281 U CN 212155281U
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Abstract
A noise elimination device for a tunnel fan comprises a first noise elimination part and a second noise elimination part, wherein the first noise elimination part comprises a first cylinder and a sound absorption material; the second silencing part comprises a second barrel, an inner-layer barrel with a through hole, a middle-layer barrel and an outer-layer barrel, the right port of the first barrel is communicated with the left port of the second barrel, a second groove is formed in the inner peripheral wall surface of the second barrel, the outer-layer barrel is sleeved in the second groove, the opening edges at two ends of the outer-layer barrel are respectively fixed on the inner wall surface corresponding to the second groove, the middle-layer barrel is sleeved in the outer-layer barrel, the opening edges at two ends of the middle-layer barrel are respectively fixed on the inner wall surface corresponding to the second groove, the inner-layer barrel is sleeved in the middle-layer barrel, the opening edges at two ends of the inner-layer barrel are respectively fixed on the inner wall surface corresponding to the second groove, a first annular space and a second annular space filled with sound absorbing materials are formed.
Description
Technical Field
The utility model relates to a noise elimination technical field specifically is a noise eliminator for tunnel fan.
Background
The tunnel fan is widely applied to tunnels of water conservancy dam engineering, highways, railways, subways and the like. Meanwhile, the tunnel noise is a main source of the tunnel noise, the frequency range of the tunnel noise is wide, and the tunnel noise exists in the range of 125-6300 Hz.
At present, the control and treatment of the noise of the tunnel fan are mainly realized by adopting a method of arranging a resistive muffler. However, the application of the impedance muffler to the tunnel fan mainly has two problems:
(1) the impedance muffler mainly adopts a noise reduction material to treat noise, but the mode has obvious noise reduction effect on high-frequency noise and poor noise reduction effect on low-frequency noise;
(2) the impedance muffler mainly adopts the filling sound absorption cotton as a sound absorption material, and in order to achieve a good sound absorption effect (absorption of high, medium and low frequency noises), the thickness of the sound absorption cotton needs to be increased, so that the volume of the muffler is huge, the muffler occupies a large effective ventilation section of a tunnel, large resistance is generated, pressure loss is caused, and the effective power of a fan is reduced. Even so, the effect of absorbing mid and low frequency noise is still not ideal.
Disclosure of Invention
The utility model aims to provide a: aiming at the defects of the prior art, the noise eliminator for the tunnel fan is provided, which can treat high, medium and low frequency noises.
The technical scheme adopted by the utility model is that, a noise eliminator for tunnel fan, the noise eliminator includes first noise elimination portion and second noise elimination portion, the first noise elimination portion mainly comprises annular first barrel and sound-absorbing material, the fan is arranged in the first barrel, the first groove in the shape of annular groove is arranged on the inner peripheral wall surface of the first barrel, and the sound-absorbing material is arranged in the first groove; the second silencing part mainly comprises an annular second cylinder body, an inner-layer cylinder, a middle-layer cylinder, an outer-layer cylinder, a sound-absorbing material and fireproof sound-absorbing cotton, wherein the right port of the first cylinder body is communicated with the left port of the second cylinder body, a second groove in the shape of an annular groove is formed in the inner peripheral wall surface of the second cylinder body, the outer-layer cylinder is sleeved in the second groove, the port edges at two ends of the outer-layer cylinder are respectively and fixedly connected to the inner wall surface corresponding to the second groove, the middle-layer cylinder is sleeved in the outer-layer cylinder, the port edges at two ends of the middle-layer cylinder are respectively and fixedly connected to the inner wall surface corresponding to the second groove, the inner-layer cylinder is sleeved in the middle-layer cylinder, and the port edges at two ends of the inner-layer cylinder are respectively and fixedly connected to the inner wall surface corresponding to the second; the inner layer cylinder, the middle layer cylinder and the inner wall surface of the second groove between the inner layer cylinder and the middle layer cylinder are enclosed into a first annular space in an annular shape; the middle-layer cylinder, the outer-layer cylinder and the inner wall surface of the second groove between the middle-layer cylinder and the outer-layer cylinder form a second annular space in an annular shape; a third annular space in an annular shape is formed by the outer layer cylinder, the inner bottom surface in the second groove and the inner wall surface of the second groove between the outer layer cylinder and the inner bottom surface in the second groove; a plurality of through holes are formed in the outer peripheral wall of the inner-layer cylinder, the middle-layer cylinder and the outer-layer cylinder, sound-absorbing materials are filled in the first annular space and the second annular space, and fireproof sound-absorbing cotton is filled in the third annular space.
The length ratio of the first sound eliminating part to the second sound eliminating part is 1: 1.5 to 1.6.
The thickness of the inner layer cylinder, the thickness of the middle layer cylinder and the thickness of the outer layer cylinder are all 0.9-1.2 mm.
The diameter ranges of the through holes on the peripheral wall of the inner cylinder, the through holes on the peripheral wall of the middle cylinder and the through holes on the peripheral wall of the outer cylinder are all between 0.5mm and 0.6mm to 1 mm.
Further, the size of the through hole on the outer peripheral wall of the inner cylinder is gradually reduced from the side close to the fan to the side far away from the fan, and the number of the through holes is gradually reduced from the side close to the fan to the side far away from the fan.
Further, the inner layer cylinder has a higher perforation rate than the outer layer cylinder.
The ratio of the depth value of the first annular space to the depth value of the second annular space to the depth value of the third annular space is 1: 2: 3.
the sound-absorbing material is made of wave crest sound-absorbing cotton, slag wool or blankets.
The fireproof sound-absorbing cotton is made of centrifugal glass cotton.
The utility model has the advantages that:
1. the utility model discloses a set up first noise elimination portion and second noise elimination portion, absorb, subdue the processing to high frequency noise, well, low frequency noise respectively, realized noise eliminator and handled the ability of high, well, low frequency noise, extended noise eliminator's sound absorption frequency band scope. The first noise elimination part is used for processing high-frequency noise, and the second noise elimination part is used for processing middle-frequency and low-frequency noise.
2. The utility model discloses in, set up through the segmentation (set up first noise elimination portion and second noise elimination portion on the length direction) to replace traditional impedance silencer and strengthen the noise cancelling effect through the mode of the cotton thickness of simple increase sound absorption, avoided the noise eliminator volume too huge, occupy the effective ventilation cross-section in great tunnel, produce great resistance, arouse loss of pressure, cause the effective power decline of fan.
Drawings
The present invention will be further described with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of the present invention.
The reference numbers in the figures mean: 1 — a first muffling portion; 101-a first cylinder; 102. 205-sound absorbing material; 2-a second muffling portion; 201-a second cylinder; 202-inner cylinder; 203-middle layer cylinder; 204-outer cylinder; 206-fireproof sound-absorbing cotton; 3-the connection.
Detailed Description
Referring to FIG. 1: the utility model relates to a noise eliminator for tunnel fan, this noise eliminator mainly uses in straight tunnel.
The muffler device includes a first muffler portion 1 and a second muffler portion 2. The utility model discloses a set up first noise elimination portion 1 and second noise elimination portion 2, absorb, subdue the processing to high frequency noise, well, low frequency noise respectively, realized noise eliminator and handled the ability of high, well, low frequency noise, expanded noise eliminator's sound absorption frequency band scope. The first muffling part 1 is used for processing high-frequency noise, and the second muffling part 2 is used for processing middle-frequency and low-frequency noise. Through the segmentation setting (set up first noise elimination portion 1 and second noise elimination portion 2 along length direction) to replace traditional impendance silencer and strengthen noise cancelling effect through the mode of the cotton thickness of simple increase sound absorption, avoided noise eliminator volume too huge, occupy the effective ventilation cross-section in great tunnel, produce great resistance, arouse loss of pressure, cause the effective power decline of fan.
The first sound-deadening portion 1 is mainly composed of a ring-shaped first cylinder 101 and a sound-deadening material 102,
a fan is arranged in the first cylinder 101 and welded in the first cylinder 101 through a support, and the connection mode belongs to application of conventional means in the mechanical field. For example, several brace bars are welded at the mouth edge of the left port of the first cylinder 101, which extend into the first cylinder 101, and then the outer profile of the fan is welded to this brace bar. Of course, other fastening means may be used.
The inner peripheral wall surface of the first cylinder 101 is provided with a first groove in the shape of an annular groove, and a sound absorbing material 102 is provided in the first groove and can be adhered to the first groove by glue or the like. Of course, other fastening means may be used.
The second sound-absorbing part 2 is mainly composed of a ring-shaped second cylinder 201, an inner layer cylinder 202, a middle layer cylinder 203, an outer layer cylinder 204, a sound-absorbing material 205 and fireproof sound-absorbing cotton 206,
the right port of the first cylinder 101 is communicated with the left port of the second cylinder 201, and the first cylinder 101 and the second cylinder 201 are concentrically and coaxially arranged and have the same inner diameter at the communication part 3. The communication parts 3 can be connected by welding or alternatively by bolts.
A second groove in the shape of an annular groove is formed in the inner peripheral wall surface of the second cylinder 201, the outer cylinder 204 is sleeved in the second groove, the opening edges at two ends of the outer cylinder 204 are respectively and fixedly connected to the inner wall surfaces corresponding to the second groove, the middle cylinder 203 is sleeved in the outer cylinder 204, the opening edges at two ends of the middle cylinder 203 are respectively and fixedly connected to the inner wall surfaces corresponding to the second groove, the inner cylinder 202 is sleeved in the middle cylinder 203, and the opening edges at two ends of the inner cylinder 202 are respectively and fixedly connected to the inner wall surfaces corresponding to the second groove; the inner layer cylinder 202, the middle layer cylinder 203 and the inner wall surface of the second groove between the inner layer cylinder 202 and the middle layer cylinder 203 form a first annular space in an annular shape; a second annular space in an annular shape is enclosed by the middle-layer cylinder 203, the outer-layer cylinder 204 and the inner wall surface of the second groove between the middle-layer cylinder 203 and the outer-layer cylinder 204; a third annular space in an annular shape is formed by the outer layer cylinder 204, the inner bottom surface in the second groove and the inner wall surface of the second groove between the outer layer cylinder 204 and the inner bottom surface in the second groove;
the inner cylinder 202, the middle cylinder 203 and the outer cylinder 204 are all provided with a plurality of through holes on the outer peripheral wall, sound absorbing materials (102, 205) are filled in the first annular space and the second annular space, and fireproof sound absorbing cotton 206 is filled in the third annular space.
The length ratio of the first sound-absorbing part 1 to the second sound-absorbing part 2 is 1: 1.5 to 1.6. And determining the specific lengths of the first sound-absorbing part 1 and the second sound-absorbing part 2 according to the size of the actual tunnel fan.
Preferably, the thickness of the inner layer cylinder 202, the thickness of the middle layer cylinder 203 and the thickness of the outer layer cylinder 204 are all 0.9-1.2 mm. For example, 0.9mm, 1mm, 1.2 mm.
Preferably, the diameter of the through hole on the outer peripheral wall of the inner cylinder 202, the diameter of the through hole on the outer peripheral wall of the middle cylinder 203 and the diameter of the through hole on the outer peripheral wall of the outer cylinder 204 are all in the range of 0.5-0.6 mm to 1 mm. E.g. 0.5mm, 0.6mm, 0.9mm, 1 mm.
Preferably, the size of the through holes in the outer peripheral wall of the inner cylinder 202 is gradually reduced from the side close to the fan to the side away from the fan, and the number of the through holes is gradually reduced from the side close to the fan to the side away from the fan.
Preferably, the inner cylinder 202 has a higher perforation rate than the outer cylinder 204. Facilitating the entrance of a wide frequency band of noise into the inner cylinder 202.
Preferably, the ratio of the depth value of the first annular space, the depth value of the second annular space and the depth value of the third annular space is 1: 1.8: 3.
preferably, the sound absorbing material (102, 205) is made of wave absorbing cotton, slag cotton or a blanket. Preferably, the fireproof sound absorption cotton 206 is made of centrifugal glass wool.
In order to optimize the noise elimination effect and facilitate the entrance and absorption of noise, the inner diameter of the inner cylinder 202, the inner diameter of the middle cylinder 203 and the inner diameter of the outer cylinder 204 are gradually reduced from the side close to the fan to the side far from the fan.
The above detailed description is only for the purpose of illustration, but not for the purpose of limitation. Although the present invention has been described in detail with reference to the specific embodiments thereof, it will be understood by those skilled in the art that: the above-mentioned specific technical solutions can still be modified, or some technical features thereof can be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the present invention in its essence.
Claims (9)
1. The utility model provides a noise eliminator for tunnel fan which characterized in that: the muffler device includes a first muffler portion and a second muffler portion,
the first silencing part mainly comprises an annular first cylinder and a sound-absorbing material,
a fan is arranged in the first cylinder, a first groove in the shape of an annular groove is formed in the inner peripheral wall surface of the first cylinder, and a sound absorption material is arranged in the first groove;
the second silencing part mainly comprises an annular second cylinder body, an inner layer cylinder, a middle layer cylinder, an outer layer cylinder, a sound-absorbing material and fireproof sound-absorbing cotton,
the right port of the first cylinder is communicated with the left port of the second cylinder,
the inner peripheral wall surface of the second cylinder body is provided with a second groove in the shape of an annular groove, the second groove is internally sleeved with the outer cylinder, the opening edges at two ends of the outer cylinder are respectively and fixedly connected to the inner wall surfaces corresponding to the second groove, the outer cylinder is internally sleeved with the middle cylinder, the opening edges at two ends of the middle cylinder are respectively and fixedly connected to the inner wall surfaces corresponding to the second groove, the middle cylinder is internally sleeved with the inner cylinder, and the opening edges at two ends of the inner cylinder are respectively and fixedly connected to the inner wall surfaces corresponding to the second groove; the inner layer cylinder, the middle layer cylinder and the inner wall surface of the second groove between the inner layer cylinder and the middle layer cylinder are enclosed into a first annular space in an annular shape; the middle-layer cylinder, the outer-layer cylinder and the inner wall surface of the second groove between the middle-layer cylinder and the outer-layer cylinder form a second annular space in an annular shape; a third annular space in an annular shape is formed by the outer layer cylinder, the inner bottom surface in the second groove and the inner wall surface of the second groove between the outer layer cylinder and the inner bottom surface in the second groove;
a plurality of through holes are formed in the outer peripheral wall of the inner-layer cylinder, the middle-layer cylinder and the outer-layer cylinder, sound-absorbing materials are filled in the first annular space and the second annular space, and fireproof sound-absorbing cotton is filled in the third annular space.
2. The muffling device for a tunnel blower of claim 1, wherein: the length ratio of the first sound eliminating part to the second sound eliminating part is 1: 1.5 to 1.6.
3. The muffling device for a tunnel blower of claim 1, wherein: the thickness of the inner layer cylinder, the thickness of the middle layer cylinder and the thickness of the outer layer cylinder are all 0.9-1.2 mm.
4. The muffling device for a tunnel blower of claim 1, wherein: the diameter ranges of the through holes on the peripheral wall of the inner cylinder, the through holes on the peripheral wall of the middle cylinder and the through holes on the peripheral wall of the outer cylinder are all between 0.5mm and 0.6mm to 1 mm.
5. The muffling device for tunnel fans of claim 1, 3 or 4, wherein: the size of the through hole on the peripheral wall of the inner-layer cylinder is gradually reduced from one side close to the fan to one side far away from the fan, and the quantity of the through hole is gradually reduced from one side close to the fan to one side far away from the fan.
6. The muffling device for tunnel fans of claim 1, 3 or 4, wherein: the inner cylinder has a perforation rate greater than that of the outer cylinder.
7. The muffling device for a tunnel blower of claim 1, wherein: the ratio of the depth value of the first annular space to the depth value of the second annular space to the depth value of the third annular space is 1: 2: 3.
8. the muffling device for a tunnel blower of claim 1, wherein: the sound-absorbing material is made of wave crest sound-absorbing cotton, slag wool or blankets.
9. The muffling device for a tunnel blower of claim 1, wherein: the fireproof sound-absorbing cotton is made of centrifugal glass cotton.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020702545.8U CN212155281U (en) | 2020-04-30 | 2020-04-30 | Noise elimination device for tunnel fan |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020702545.8U CN212155281U (en) | 2020-04-30 | 2020-04-30 | Noise elimination device for tunnel fan |
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| CN212155281U true CN212155281U (en) | 2020-12-15 |
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| CN202020702545.8U Active CN212155281U (en) | 2020-04-30 | 2020-04-30 | Noise elimination device for tunnel fan |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113797050A (en) * | 2021-09-03 | 2021-12-17 | 深圳市壹智造科技有限公司 | Embedded medical equipment box |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113797050A (en) * | 2021-09-03 | 2021-12-17 | 深圳市壹智造科技有限公司 | Embedded medical equipment box |
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