CN109373096A - A kind of hush pipe for building road - Google Patents
A kind of hush pipe for building road Download PDFInfo
- Publication number
- CN109373096A CN109373096A CN201811201277.5A CN201811201277A CN109373096A CN 109373096 A CN109373096 A CN 109373096A CN 201811201277 A CN201811201277 A CN 201811201277A CN 109373096 A CN109373096 A CN 109373096A
- Authority
- CN
- China
- Prior art keywords
- noise reducing
- reducing pipe
- air hose
- pipe
- wind deflector
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- 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
-
- 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
- F16L55/027—Throttle passages
- F16L55/02709—Throttle passages in the form of perforated plates
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pipe Accessories (AREA)
Abstract
The present invention relates to silencing pipeline technical fields, and disclose a kind of hush pipe for building road, including tapered pipeline and air hose, the fixed connection of the tapered pipeline is at the top of air hose, first flange is fixedly connected at the nozzle of the tapered pipeline, the air hose is fixedly connected with taper wind deflector inside the side of tapered pipeline, the bottom of taper wind deflector described in inside specific embodiment of the cone tip part of the taper wind deflector towards air hose is fixedly connected with the first noise reducing pipe and the second noise reducing pipe, the second noise reduction pipe sleeve is in the inside of the first noise reducing pipe, the inside of air hose is separated into multiple ventilated cavities by first noise reducing pipe and the second noise reducing pipe, several first ventilation holes corresponding with multiple ventilated cavities are offered on the taper wind deflector, the bottom of first noise reducing pipe and the second noise reducing pipe is fixedly connected with air outlet plate jointly.The hush pipe for building road has the advantages of structural strength for capableing of high-efficient noise-reducing and increase pipeline.
Description
Technical field
The present invention relates to silencing pipeline technical field, specially a kind of hush pipe for building road.
Background technique
Between floors often it can be seen that being used to the ventilation shaft of ventilating air, ventilation shaft is industry and civil buildings
Air grid optimization metal or compound pipeline complex pipeline, be to reduce a kind of municipal administration of harmful gas concentration to ventilate
Infrastructure.Common ventilation shaft when in use, due to the vibration of pipeline and the conflict of pipeline inner air, causes to generate and make an uproar
Sound pollution, therefore ventilation shaft needs to pay attention to reduction noise in design and installation, the sound for issuing ventilation shaft meets
Building standard.
Currently, being mostly to reduce pipeline from the structural strength for reinforcing ventilation shaft in terms of the noise for reducing ventilation shaft
Vibration is started with, and the conflict for reducing pipeline inner air then only increases strainer, this noise reduction mode, noise reduction effect in air outlet
Fruit is not ideal enough.
Summary of the invention
(1) the technical issues of solving
In view of the deficiencies of the prior art, the present invention provides a kind of hush pipe for building road, having being capable of high-efficient noise-reducing and increase
The advantages that structural strength of pipeline, solves the problems, such as that ventilation shaft noise reduction effect is undesirable in the prior art.
(2) technical solution
To realize the purpose for capableing of high-efficient noise-reducing and the structural strength for increasing pipeline, the invention provides the following technical scheme: a kind of
Hush pipe for building road, including tapered pipeline and air hose, the fixed connection of the tapered pipeline is in the top of air hose, the reducer pipe
First flange is fixedly connected at the nozzle in road, the air hose is fixedly connected with taper inside the side of tapered pipeline and keeps out the wind
Plate, the bottom of taper wind deflector described in inside specific embodiment of the cone tip part of the taper wind deflector towards air hose is fixed to be connected
It is connected to the first noise reducing pipe and the second noise reducing pipe, the second noise reduction pipe sleeve is in the inside of the first noise reducing pipe, first noise reducing pipe
The inside of air hose is separated into multiple ventilated cavities with the second noise reducing pipe, is offered on the taper wind deflector and multiple vented cavities
The bottom of several corresponding first ventilation holes of room, first noise reducing pipe and the second noise reducing pipe is fixedly connected with outlet air jointly
Plate offers the second ventilation hole to match with the second noise reducing pipe, the surrounding side wall of the air outlet plate in the middle part of the air outlet plate
It is fixedly welded on the inner wall of air hose, fixing sleeve is connected to multiple reinforcing rings, the inside patch of the air hose on the outer wall of the air hose
With the first sound-absorbing cotton pad.
Further, the inside of the taper wind deflector is filled with ultra-fine grade environment friendly acoustical absorption cotton, and the ultra-fine grade environmental protection is inhaled
The first protective net is provided at the top of sound cotton, inner sidewall of the surrounding side wall of first protective net with taper wind deflector is fixed
Connection.
Further, first ventilation hole is obliquely installed, and is divided on the side wall of first noise reducing pipe and the second noise reducing pipe
Equally distributed multiple third venting holes and the 4th ventilation hole are not offered, are offered in the air outlet plate and are connected with ventilated cavity
Several logical the 5th ventilation holes, several 5th ventilation holes are located at the outside of the second ventilation hole, and are distributed in a ring.
Further, the bottom end of the taper wind deflector is fixedly connected with vertical partition, and the partition two sides are vertical
Side wall is fixedly welded on the inner wall of the second noise reducing pipe, offers multiple 6th ventilation holes on the partition, and multiple described
Three ventilation holes, the 4th ventilation hole and the 6th ventilation hole are located at differentiated levels.
Further, the second sound-absorbing cotton pad, the second acoustical cotton cushion cover are provided between the two neighboring reinforcing ring
It is located on the outer wall of air hose.
Further, the outer sheath of the second sound-absorbing cotton pad is equipped with the second protective net.
Further, the first sound-absorbing cotton pad is equipped with multiple equally distributed protrusions close to the side of the first noise reducing pipe.
(3) beneficial effect
Compared with prior art, the present invention provides a kind of hush pipe for building road, have it is following the utility model has the advantages that
1, hush pipe for building road, by the way that tapered pipeline, air hose, taper wind deflector, the first noise reducing pipe, the second noise reduction is arranged
Pipe, air outlet plate, the first ventilation hole and the second ventilation hole can use tapered pipeline becoming larger in air inlet diameter, to realize
Then the reduction of air inlet wind speed can further slow down wind speed by taper wind deflector, and then reduce air in air hose
The impact in portion can be such that the air inside air hose is split, further be subtracted by the setting of the first noise reducing pipe and the second noise reducing pipe
The impact of slow air hose inner air, to play the effect of noise reduction；Reinforcing ring, Ke Yizeng are fixedly attached by the outside in air hose
The structural strength of high wind pipe, and then slow down the vibration of air hose, to enhance the effect of noise reduction.
2, hush pipe for building road, by the way that ultra-fine grade environment friendly acoustical absorption cotton, Ke Yijin is arranged in the inside of taper wind deflector
The impact that one step reduces air can prevent ultra-fine grade acoustical cotton from being rolled by the air-flow of air by the setting of the first protective net,
So that ultra-fine grade environment friendly acoustical absorption cotton is able to maintain the stabilization of its form, in order to avoid influence its function.
3, the hush pipe for building road can make the gas in air hose by setting third venting hole and the 4th ventilation hole
Stream causes the resonance of ventilated cavity internal gas out-of-date from ventilated cavity inside stream, and then weakens the kinetic energy of gas, reaches drop
The effect made an uproar.
4, the hush pipe for building road is arranged the second sound-absorbing cotton pad and the second protective net by the outside in air hose, can be with
It reduces air hose and shakes generated noise, the second protective net can keep the stabilization of the second acoustical cotton pulvilliform state, noise reduction is avoided to imitate
Fruit is weakened.
5, the hush pipe for building road can be further decreased in air hose by the way that protrusion is arranged in the first sound-absorbing cotton pad
The kinetic energy of portion's air-flow plays the effect of noise reduction.
Detailed description of the invention
Fig. 1 is a kind of hush pipe for building road structural schematic diagram proposed by the present invention；
Fig. 2 is a kind of schematic diagram of internal structure in hush pipe for building road proposed by the present invention；
Fig. 3 is the partial structurtes enlarged drawing in the portion A in a kind of hush pipe for building road Fig. 2 proposed by the present invention；
Fig. 4 is the partial structurtes enlarged drawing in the portion B in a kind of hush pipe for building road Fig. 2 proposed by the present invention.
In figure: 1 tapered pipeline, 2 air hoses, 3 first flanges, 4 taper wind deflectors, 5 first noise reducing pipes, 6 second noise reducing pipes, 7
First ventilation hole, 8 air outlet plates, 9 reinforcing rings, 10 first sound-absorbing cotton pads, 11 ultra-fine grades of environment friendly acoustical absorption cottons, 12 first protective nets, 13
Partition, 14 second sound-absorbing cotton pads, 15 second protective nets.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Embodiment 1
Fig. 1-4, a kind of hush pipe for building road, including tapered pipeline 1 and air hose 2 are please referred to, the fixed connection of tapered pipeline 1 is in wind
The top of pipe 2, first flange 3 is fixedly connected at the nozzle of tapered pipeline 1, and air hose 2 is solid inside the side of tapered pipeline 1
Surely it is connected with taper wind deflector 4, the inside specific embodiment taper wind deflector 4 of the cone tip part of taper wind deflector 4 towards air hose 2
Bottom be fixedly connected with the first noise reducing pipe 5 and the second noise reducing pipe 6, the second 6 sets of noise reducing pipe is in the inside of the first noise reducing pipe 5,
The inside of air hose 2 is separated into multiple ventilated cavities by one noise reducing pipe 5 and the second noise reducing pipe 6, offered on taper wind deflector 4 with it is more
The bottom of several corresponding first ventilation holes 7 of a ventilated cavity, the first noise reducing pipe 5 and the second noise reducing pipe 6 is jointly fixed to be connected
It is connected to air outlet plate 8, the middle part of air outlet plate 8 offers the second ventilation hole to match with the second noise reducing pipe 6, the surrounding of air outlet plate 8
Side wall is fixedly welded on the inner wall of air hose 2, and fixing sleeve is connected to multiple reinforcing rings 9, the inside patch of air hose 2 on the outer wall of air hose 2
With the first sound-absorbing cotton pad 10, the becoming larger in air inlet diameter of tapered pipeline 1 can use, to realize air inlet wind speed
It reduces, wind speed can further then be slowed down by taper wind deflector 4, and then reduce impact of the air inside air hose 2, pass through
The setting of first noise reducing pipe 5 and the second noise reducing pipe 6, can be such that the air inside air hose 2 is split, and further slow down in air hose 2
The impact of portion's air, to play the effect of noise reduction；By being fixedly attached reinforcing ring 9 in the outside of air hose 2, air hose can be enhanced
2 structural strength, and then slow down the vibration of air hose 2, to enhance the effect of noise reduction.
The inside of taper wind deflector 4 is filled with ultra-fine grade environment friendly acoustical absorption cotton 11, and the top of ultra-fine grade environment friendly acoustical absorption cotton 11 is set
It is equipped with the first protective net 12, the surrounding side wall of the first protective net 12 is fixedly connected with the inner sidewall of taper wind deflector 4, Ke Yijin
The impact that one step reduces air can prevent ultra-fine grade acoustical cotton 11 by the air-flow of air by the setting of the first protective net 12
It rolls, so that ultra-fine grade environment friendly acoustical absorption cotton 11 is able to maintain the stabilization of its form, in order to avoid influence its function.
First ventilation hole 7 is obliquely installed, and is offered on the side wall of the first noise reducing pipe 5 and the second noise reducing pipe 6 and is uniformly divided respectively
It is the 5th logical to offer several that be connected with ventilated cavity in air outlet plate 8 for multiple third venting holes of cloth and the 4th ventilation hole
Air holes, several 5th ventilation holes are located at the outside of the second ventilation hole, and are distributed in a ring.
Embodiment 2
Fig. 1-4, a kind of hush pipe for building road, including tapered pipeline 1 and air hose 2 are please referred to, the fixed connection of tapered pipeline 1 is in wind
The top of pipe 2, first flange 3 is fixedly connected at the nozzle of tapered pipeline 1, and air hose 2 is solid inside the side of tapered pipeline 1
Surely it is connected with taper wind deflector 4, the inside specific embodiment taper wind deflector 4 of the cone tip part of taper wind deflector 4 towards air hose 2
Bottom be fixedly connected with the first noise reducing pipe 5 and the second noise reducing pipe 6, the second 6 sets of noise reducing pipe is in the inside of the first noise reducing pipe 5,
The inside of air hose 2 is separated into multiple ventilated cavities by one noise reducing pipe 5 and the second noise reducing pipe 6, offered on taper wind deflector 4 with it is more
The bottom of several corresponding first ventilation holes 7 of a ventilated cavity, the first noise reducing pipe 5 and the second noise reducing pipe 6 is jointly fixed to be connected
It is connected to air outlet plate 8, the middle part of air outlet plate 8 offers the second ventilation hole to match with the second noise reducing pipe 6, the surrounding of air outlet plate 8
Side wall is fixedly welded on the inner wall of air hose 2, and fixing sleeve is connected to multiple reinforcing rings 9, the inside patch of air hose 2 on the outer wall of air hose 2
With the first sound-absorbing cotton pad 10, the first sound-absorbing cotton pad 10 is equipped with multiple equally distributed protrusions close to the side of the first noise reducing pipe 5,
The kinetic energy that air hose internal gas flow can be further decreased plays the effect of noise reduction, is provided with second between two neighboring reinforcing ring 9
Sound-absorbing cotton pad 14, the second sound-absorbing cotton pad 14 are set on the outer wall of air hose 2, and it is anti-that the outer sheath of the second sound-absorbing cotton pad 14 is equipped with second
Protective net 15 can reduce air hose 2 and shake generated noise, and the second protective net 15 can keep 14 form of the second sound-absorbing cotton pad
Stablize, noise reduction effect is avoided to be weakened.
The inside of taper wind deflector 4 is filled with ultra-fine grade environment friendly acoustical absorption cotton 11, and the top of ultra-fine grade environment friendly acoustical absorption cotton 11 is set
It is equipped with the first protective net 12, the surrounding side wall of the first protective net 12 is fixedly connected with the inner sidewall of taper wind deflector 4.
First ventilation hole 7 is obliquely installed, and is offered on the side wall of the first noise reducing pipe 5 and the second noise reducing pipe 6 and is uniformly divided respectively
It is the 5th logical to offer several that be connected with ventilated cavity in air outlet plate 8 for multiple third venting holes of cloth and the 4th ventilation hole
Air holes, several 5th ventilation holes are located at the outside of the second ventilation hole, and are distributed in a ring, and the bottom end of taper wind deflector 4 is fixed to be connected
It is connected to vertical partition 13, the vertical side wall in 13 two sides of partition is fixedly welded on the inner wall of the second noise reducing pipe 6, on partition 13
Multiple 6th ventilation holes are offered, multiple third venting holes, the 4th ventilation hole and the 6th ventilation hole are located at different level height
Degree, so that the flowing of 2 internal gas flow of air hose is substantially weakened, and then achievees the effect that noise reduction.
The present embodiment the difference from embodiment 1 is that, equally distributed protrusion is provided in the first sound-absorbing cotton pad 10, can be with
The kinetic energy for further weakening air-flow, enhances the effect of noise reduction, and be arranged the second sound-absorbing cotton pad 14, Ke Yixiao in the outside of air hose 2
Weak air hose 2 shakes brought noise, the setting in third venting hole, the 4th ventilation hole, the 6th ventilation hole and partition 13, Yi Ji
Three ventilation holes, the 4th ventilation hole and the 6th ventilation hole are located at differentiated levels, can make the stream of 2 internal gas flow of air hose
It is dynamic substantially to be weakened, and then achieve the effect that noise reduction.
It should be noted that the terms "include", "comprise" or its any other variant are intended to the packet of nonexcludability
Contain, so that the process, method, article or equipment for including a series of elements not only includes those elements, but also including
Other elements that are not explicitly listed, or further include for elements inherent to such a process, method, article, or device.
In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including the element
Process, method, article or equipment in there is also other identical elements.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (7)
1. a kind of hush pipe for building road, including tapered pipeline (1) and air hose (2), it is characterised in that: the tapered pipeline (1)
Fixed connection is fixedly connected with first flange (3), the air hose at the top of air hose (2), the nozzle of the tapered pipeline (1)
(2) it is fixedly connected with taper wind deflector (4) inside the side of tapered pipeline (1), the cone tip part of the taper wind deflector (4)
The first noise reducing pipe (5) are fixedly connected with towards the bottom of inside (specific embodiment) the taper wind deflector (4) of air hose (2)
With the second noise reducing pipe (6), second noise reducing pipe (6) covers in the inside of the first noise reducing pipe (5), first noise reducing pipe (5) and
The inside of air hose (2) is separated into multiple ventilated cavities by the second noise reducing pipe (6), is offered on the taper wind deflector (4) and more
Several corresponding first ventilation holes (7) of a ventilated cavity, the bottom of first noise reducing pipe (5) and the second noise reducing pipe (6)
It is fixedly connected with jointly air outlet plate (8), offers second to match with the second noise reducing pipe (6) in the middle part of the air outlet plate (8)
The surrounding side wall of ventilation hole, the air outlet plate (8) is fixedly welded on the inner wall of air hose (2), solid on the outer wall of the air hose (2)
Surely it is socketed with multiple reinforcing rings (9), the inside of the air hose (2) is pasted with the first sound-absorbing cotton pad (10).
2. a kind of hush pipe for building road according to claim 1, it is characterised in that: the taper wind deflector (4) it is interior
Portion is filled with ultra-fine grade environment friendly acoustical absorption cotton (11), is provided with the first protective net at the top of the ultra-fine grade environment friendly acoustical absorption cotton (11)
(12), the surrounding side wall of first protective net (12) is fixedly connected with the inner sidewall of taper wind deflector (4).
3. a kind of hush pipe for building road according to claim 1, it is characterised in that: the first ventilation hole (7) inclination
Equally distributed multiple third ventings are offered respectively on the side wall of setting, first noise reducing pipe (5) and the second noise reducing pipe (6)
Hole and the 4th ventilation hole offer several the 5th ventilation holes being connected with ventilated cavity, Ruo Gansuo on the air outlet plate (8)
The outside that the 5th ventilation hole is located at the second ventilation hole is stated, and is distributed in a ring.
4. a kind of hush pipe for building road according to claim 3, it is characterised in that: the bottom of the taper wind deflector (4)
End is fixedly connected with vertical partition (13), and the vertical side wall in partition (13) two sides is fixedly welded on the second noise reducing pipe
(6) on inner wall, multiple 6th ventilation holes, multiple third venting holes, the 4th ventilation hole are offered on the partition (13)
Differentiated levels are located at the 6th ventilation hole.
5. a kind of hush pipe for building road according to claim 1, it is characterised in that: the two neighboring reinforcing ring (9)
Between be provided with the second sound-absorbing cotton pad (14), the second sound-absorbing cotton pad (14) is set on the outer wall of air hose (2).
6. a kind of hush pipe for building road according to claim 5, it is characterised in that: the second sound-absorbing cotton pad (14)
Outer sheath is equipped with the second protective net (15).
7. a kind of hush pipe for building road according to claim 1, it is characterised in that: the first sound-absorbing cotton pad (10) is leaned on
The side of nearly first noise reducing pipe (5) is equipped with multiple equally distributed protrusions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811201277.5A CN109373096A (en) | 2018-10-16 | 2018-10-16 | A kind of hush pipe for building road |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811201277.5A CN109373096A (en) | 2018-10-16 | 2018-10-16 | A kind of hush pipe for building road |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109373096A true CN109373096A (en) | 2019-02-22 |
Family
ID=65400519
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811201277.5A Pending CN109373096A (en) | 2018-10-16 | 2018-10-16 | A kind of hush pipe for building road |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109373096A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110486351A (en) * | 2019-09-11 | 2019-11-22 | 襄阳元创汽车零部件实业有限公司 | A kind of 500T feeder muffler and its operating method |
| CN111442516A (en) * | 2020-05-08 | 2020-07-24 | 西安艾科特声学科技有限公司 | A air exchange system noise control device for in low noise room |
| CN112253870A (en) * | 2020-10-27 | 2021-01-22 | 方王超 | Launching transition pipeline for building |
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| CN202132207U (en) * | 2011-07-02 | 2012-02-01 | 吉林市欣平机电设备制造有限责任公司 | Folded plate composite type silencer |
| CN206668633U (en) * | 2017-04-21 | 2017-11-24 | 北京市京日饲料有限公司 | Muffler for fan |
| CN206724445U (en) * | 2017-04-28 | 2017-12-08 | 湖南城市学院 | A kind of silencer for HVAC ventilating system |
| CN107588250A (en) * | 2017-08-31 | 2018-01-16 | 安徽大地环保科技有限公司 | A kind of multilayer silencing pipeline |
| CN207229476U (en) * | 2017-08-24 | 2018-04-13 | 浙江钜联风能机械有限公司 | A kind of noise reduction dust-extraction unit for air inlet |
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2018
- 2018-10-16 CN CN201811201277.5A patent/CN109373096A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202132207U (en) * | 2011-07-02 | 2012-02-01 | 吉林市欣平机电设备制造有限责任公司 | Folded plate composite type silencer |
| CN206668633U (en) * | 2017-04-21 | 2017-11-24 | 北京市京日饲料有限公司 | Muffler for fan |
| CN206724445U (en) * | 2017-04-28 | 2017-12-08 | 湖南城市学院 | A kind of silencer for HVAC ventilating system |
| CN207229476U (en) * | 2017-08-24 | 2018-04-13 | 浙江钜联风能机械有限公司 | A kind of noise reduction dust-extraction unit for air inlet |
| CN107588250A (en) * | 2017-08-31 | 2018-01-16 | 安徽大地环保科技有限公司 | A kind of multilayer silencing pipeline |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110486351A (en) * | 2019-09-11 | 2019-11-22 | 襄阳元创汽车零部件实业有限公司 | A kind of 500T feeder muffler and its operating method |
| CN110486351B (en) * | 2019-09-11 | 2022-04-05 | 襄阳元创汽车零部件实业有限公司 | Exhaust silencer of 500T feeder and operation method thereof |
| CN111442516A (en) * | 2020-05-08 | 2020-07-24 | 西安艾科特声学科技有限公司 | A air exchange system noise control device for in low noise room |
| CN112253870A (en) * | 2020-10-27 | 2021-01-22 | 方王超 | Launching transition pipeline for building |
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Application publication date: 20190222 |
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