CN205842088U - Pipeline acoustic filter - Google Patents
Pipeline acoustic filter Download PDFInfo
- Publication number
- CN205842088U CN205842088U CN201620844718.3U CN201620844718U CN205842088U CN 205842088 U CN205842088 U CN 205842088U CN 201620844718 U CN201620844718 U CN 201620844718U CN 205842088 U CN205842088 U CN 205842088U
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- Prior art keywords
- ring
- acoustic filter
- connection ring
- pipeline
- muffler section
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Abstract
A kind of pipeline acoustic filter, including: the Helmholtz muffler section that in axial direction sets gradually, expansion muffler section；Helmholtz muffler section includes: first connects ring, the second connection ring, and two centre bores connecting rings are relative；Mozzle, connects between ring, the second connection ring first, is connected ring, the centre bore connection of the second connection ring respectively with first, the tube wall of mozzle has through hole；Expansion muffler section includes: the 3rd connection ring, the 4th connection ring, two centre bores connecting rings are relative, and fixing connection.When pipeline acoustic filter inserts in pipeline, the tube wall of pipeline and the first connection ring, the second connection ring, the 3rd connection ring, the 4th connection ring are affixed, Helmholtz muffler section and tube wall combination form Helmholtz acoustic filter, expansion muffler section, mozzle and tube wall combination form expansion muffler, therefore, according to Helmholtz acoustic filter, the characteristic of expansion muffler, it is possible to eliminate the different noises on different frequency range.
Description
Technical field
This utility model relates to silencing apparatus technical field, is specifically related to a kind of pipeline acoustic filter.
Background technology
Acoustic filter is the propagation that can stop sound wave, and a kind of device allowing air-flow to pass through, it is the effective of control noise
Instrument.According to the difference of noise-cancelling theory, acoustic filter substantially can be divided into dissipative muffler, reactive muffler and impedance composite to disappear
Sound device.Dissipative muffler is to utilize the sound-absorbing material being laid in acoustic filter pipeline to absorb acoustic energy, to reach to reduce exit
Radiation acoustic energy.
Reactive muffler is mainly by the sudden change reflecting part acoustic energy of acoustic reactance in passage, thus plays the effect of noise elimination.
Narrow-band noise in the range of the frequency selectivity of reactive muffler elimination Low Medium Frequency relatively strong, applicable.Reactive muffler is generally divided into
Expanding, interference formula and resonant three types, Helmholtz acoustic wave filter structure is simple, sound deadening capacity is high, the pressure loss is little, is one
Plant application resonator muffler widely.
Fluid flows in pipeline, inevitably sends noise, and expansion muffler, Helmholtz acoustic filter are normal
With in the duct for eliminating the pipeline acoustic filter of noise.But, different acoustic filters have different acoustic characteristicses, either expand
Open formula acoustic filter or Helmholtz acoustic filter, all can only eliminate the noise in the range of special frequency channel.In pipeline, fluid is sent
Noise be all not quite similar in each frequency range, use pipeline acoustic filter of the prior art cannot effectively eliminate multiple frequencies in pipeline
Noise in section.
Utility model content
The problem that this utility model solves is that existing pipeline acoustic filter cannot effectively eliminate in pipeline in multiple frequency ranges
Noise.
For solving the problems referred to above, this utility model provides a kind of pipeline acoustic filter, including: in axial direction set gradually
Helmholtz muffler section, expansion muffler section；Described Helmholtz muffler section includes: first connects ring, second connect ring, described the
One connection ring, the second connection ring set gradually along described axial direction, and described first connects ring, the centre bore of the second connection ring
Relatively；Mozzle, connects between ring, the second connection ring described first, and two mouths of pipe of mozzle are respectively with described first
Connect ring, the second centre bore connecting ring connects, and the tube wall of described mozzle has through hole；Described expansion muffler section includes:
3rd connects ring, the 4th connection ring, and described 3rd connection ring, the 4th connection ring set gradually along described axial direction, and described
3rd connect ring, the 4th connect ring centre bore relative；Described 3rd connects ring, the 4th fixing connection of connection ring.
Optionally, along described axial direction, described Helmholtz muffler section, expansion muffler section are arranged alternately.
Optionally, adjacent described Helmholtz muffler section, expansion muffler section share one and connect ring.
Optionally, along described axial direction, first muffler section of described pipeline acoustic filter is Helmholtz muffler section；Institute
The entrance point stating pipeline acoustic filter arranges described first connection ring, along described axial direction, from being positioned at pipeline muffler inlet end
The other end of first one end of being connected with mozzle of connection ring to the first connection ring, the centre bore of described first connection ring straight
Footpath is incremented by.
Optionally, along described axial direction, last muffler section of described pipeline acoustic filter is Helmholtz muffler section；
The port of export of described pipeline acoustic filter arranges described second and connects ring, along described axial direction, from being positioned at pipeline muffler outlet
One end that second connection ring of end is connected with mozzle is to second other end connecting ring, and described second connects the centre bore of ring
Increasing diameter.
Optionally, described 3rd connection ring, the 4th surface connecting ring are plane, and are perpendicular to described pipeline acoustic filter
Central shaft.
Optionally, all of connection ring is the annulus being coaxially disposed, and all of connection ring has identical external diameter.
Optionally, in a described Helmholtz muffler section, described through hole at least two, along described mozzle circumference all
Even distribution.
Optionally, described 3rd connect ring, the 4th connect ring connect by muscle, described muscle be positioned at described 3rd connection ring,
4th radial outer edge connecting ring.
Optionally, when pipeline acoustic filter has multiple described Helmholtz muffler section, each described Helmholtz muffler section
There is different length；And/or, the mozzle of each described Helmholtz muffler section has different internal diameters.
Optionally, when pipeline acoustic filter has multiple described expansion muffler section, each expansion muffler section has different length
Degree.
Optionally, described pipeline acoustic filter also includes that first sleeve, described first sleeve are set in outside described mozzle, institute
The fixing connection in two ends described first stating first sleeve connects ring, the second connection ring；And/or, described pipeline acoustic filter also includes
Second sleeve pipe, the two ends of described second sleeve pipe are fixing connects described 3rd connection ring, the 4th connection ring.
Compared with prior art, the technical solution of the utility model has the advantage that
The pipeline acoustic filter of the technical program, disappears including the Helmholtz muffler section in axial direction set gradually, expansion
Sound section；Helmholtz muffler section includes the first connection ring, the second connection ring being oppositely arranged, and mozzle is arranged on the first connection
Between ring, the second connection ring；The 3rd connection ring that expansion muffler section includes being oppositely arranged, the 4th connect ring, the 3rd connect ring, the
Four connect the fixing connection of ring.When pipeline acoustic filter inserts in pipeline, the tube wall of pipeline and first connects ring, the second connection ring phase
Patch, Helmholtz muffler section and tube wall combination form Helmholtz acoustic filter；The tube wall of pipeline and the 3rd connects ring, the 4th connection
Ring is affixed, and expansion muffler section, mozzle and tube wall combination form expansion muffler；Therefore, according to Helmholtz acoustic filter, expansion
Open the characteristic of formula acoustic filter, it is possible to eliminate the different noises on different frequency range.
Accompanying drawing explanation
Fig. 1 is the structural perspective of this utility model first embodiment pipeline acoustic filter；
Fig. 2 is the profile of this utility model first embodiment pipeline acoustic filter；
Fig. 3 is this utility model first embodiment pipeline acoustic filter profile when being arranged in pipeline；
Fig. 4 is the structural perspective of this utility model the second embodiment pipeline acoustic filter.
Detailed description of the invention
Understandable for enabling above-mentioned purpose of the present utility model, feature and advantage to become apparent from, below in conjunction with the accompanying drawings to this
The specific embodiment of utility model is described in detail.
First embodiment
Referring to figs. 1 through Fig. 3, the present embodiment provides a kind of pipeline acoustic filter 10, including Helmholtz muffler section 10a and expansion
Muffler section 10b, Helmholtz muffler section 10a, expansion muffler section 10b set gradually along the axial direction x of pipeline acoustic filter 10.This
In axial direction x, be fluid flow direction in pipeline acoustic filter 10.
Helmholtz muffler section 10a includes that the first connection ring 11 and second connects ring 12, and two connect ring and eliminate the noise along pipeline
The axial direction x of device 10 sets gradually, and two centre bores connecting ring are relative；Helmholtz muffler section 10a also includes water conservancy diversion
Pipe 13, mozzle 13 connects ring 11, second first and connects between ring 12, and two mouths of pipe of mozzle 13 are respectively with first
Connect ring 11, second and connect the centre bore connection of ring 12, the tube wall of mozzle 13 also has through hole 13a.
Expansion muffler section 10b includes that the 3rd connection ring the 14, the 4th connects ring 15, and two connect ring along pipeline acoustic filter 10
Axial direction x sets gradually, and two centre bores connecting ring are relative；3rd connects ring the 14, the 4th connects the fixing connection of ring 15.
With reference to Fig. 1, pipeline acoustic filter 10 has three Helmholtz muffler section 10a, two expansion muffler section 10b.In order to
Can preferably play the effect of noise elimination, it is preferred that Helmholtz muffler section 10a, expansion muffler section 10b are arranged alternately.At it
In his embodiment, in axial direction x, Helmholtz muffler section can arrange multiple with continuous print, and expansion muffler section can also be continuous
Arrange multiple.
In the present embodiment, adjacent Helmholtz muffler section 10a, expansion muffler section 10b share one and connect ring, therefore,
It is same connection ring that second connection ring the 12, the 3rd connects ring 14, and the 4th connection ring 15 is first expansion muffler section 10b stream
The connection ring in body exit, is also the first connection ring 11 of second Helmholtz muffler section 10a；In like manner, second He Muhuo
Hereby the second connection ring 12 of muffler section 10a is also the 3rd connection ring 14 of second expansion muffler section 10b simultaneously；Second expansion
The 4th connection ring 15 of muffler section 10b is also the first connection ring 11 of the 3rd Helmholtz muffler section 10a simultaneously.
With reference to Fig. 3, when pipeline acoustic filter 10 is installed to pipeline 20, first connects ring 11, second connects outside ring 12
Week is affixed with the inwall of pipeline 20, and the first inwall connecting ring the 11, second connection ring 12, the outer wall of mozzle 13 and pipeline 20 encloses
The first cavity aa, the first cavity aa is become only to be connected with mozzle 13 by through hole 13a；Therefore, the first cavity aa, mozzle 13 and
Through hole 13a combination forms Helmholtz acoustic filter, when in axial direction x flows through mozzle 13 to fluid, on resonant frequency, logical
Produce violent resonant interaction between fluid at the 13a of hole and the fluid in mozzle 13 and acoustic energy has been lost, play absorption sound
Effect.
In the present embodiment, the first inwall connecting ring the 11, second connection ring 12, the outer wall of mozzle 13 and pipeline 20 surrounds
First cavity aa；In other embodiments, in the outer sheathed first sleeve of mozzle, and the two ends of first sleeve can be made to fix even
Connect the first connection ring, second connect ring, make the first connection ring, second connect ring, the outer wall of mozzle and first sleeve surround the
One cavity.
3rd connects ring 14 (i.e. second connects ring 12), the periphery of the 4th connection ring 15 (i.e. first connects ring 11) and pipeline
The inwall of 20 is affixed, and the 3rd inwall connecting ring the 14, the 4th connection ring 15 and pipeline 20 surrounds the second cavity bb, the second cavity bb
Connected with mozzle 13 by the 3rd centre bore connecting ring 14；Therefore, mozzle the 13, second cavity bb combination forms expanding
Acoustic filter, enters the second cavity bb and fluid in axial direction x outflow the second sky when fluid in axial direction x flows through mozzle 13
During the bb of chamber, undergo mutation in the cross section of pipeline, and a part is reflected back toward sound source along the sound wave of pipe transmmision so that the sound propagated forward
Produce phase contrast between ripple and echo, interfere, thus acoustic energy is lost, play the effect absorbing sound.
In the present embodiment, the 3rd inwall connecting ring the 14, the 4th connection ring 15 and pipeline 20 surrounds the second cavity bb；At it
In his embodiment, can connect the 3rd and arrange the second sleeve pipe between ring, the 4th connection ring, the two ends of the second sleeve pipe are fixing to be connected
3rd connects ring, the 4th connection ring, makes the 3rd connection ring, the 4th connection ring and the second sleeve pipe surround the first cavity.
Pipeline acoustic filter of the present utility model has the characteristic of Helmholtz acoustic filter, expansion muffler concurrently, it is possible to eliminate
Different noises on different frequency range；And multiple Helmholtz muffler section, expansion muffler section can be arranged as required to, thus cover
Cover broader noise frequency range, play more preferable soundproof effect.
In the present embodiment, in axial direction x, first muffler section of pipeline acoustic filter 10 is Helmholtz muffler section, pipe
Road acoustic filter 10 has entrance point, i.e. fluid enters the end of pipeline acoustic filter 10；First connection ring 11 is set at entrance point, the
One connection ring 11 is in horn-like, and in axial direction x, the one end being connected with mozzle 13 from the first connection ring 11 connects ring to first
The other end of 11, first connects the increasing diameter of the centre bore of ring 11.Its role is to: guide fluid, reduce fluid entrance and lead
Resistance during flow tube 13, enables the fluid in pipeline 20 to enter mozzle 13 more smoothly.Preferably, first connects ring 11
Inner surface is 45 degree of angles with the central shaft of pipeline acoustic filter 10.
In other embodiments, if the first of pipeline acoustic filter muffler section is expansion muffler section, then can eliminate the noise in expansion
One section of conduit was set before Duan, makes the mouth of pipe and the 3rd of conduit connect the centre bore connection of ring.Conduit is horn-like, vertically side
To x, connecting the one end other end to conduit of ring connection from conduit and the 3rd, the internal diameter of conduit is incremented by.
In the present embodiment, in axial direction x, last muffler section of pipeline acoustic filter 10 is also eliminated the noise for Helmholtz
Section.Pipeline acoustic filter 10 has the port of export, i.e. fluid flows out the end of pipeline acoustic filter 10；Second connection ring is set at the port of export
12, the second connection ring 12 is in horn-like, and in axial direction x, from one end that the second connection ring 12 is connected with mozzle 13 to second
Connecting the other end of ring 12, second connects the increasing diameter of the centre bore of ring 12.Its role is to: guide fluid to enter pipeline
20, it is to avoid due to the disturbance of fluid, increase resistance when fluid flows in pipeline 20.Preferably, second connects the interior of ring 12
Surface is 45 degree of angles with the central shaft of pipeline acoustic filter 10.
In other embodiments, if last muffler section of pipeline acoustic filter is expansion muffler section, then can disappear in expansion
One section of conduit is set after sound section, makes the mouth of pipe and the 4th of conduit connect the centre bore connection of ring.Conduit is horn-like, vertically
Direction x, connects the one end other end to conduit of ring connection from conduit and the 4th, and the internal diameter of conduit is incremented by.
It is respectively provided with it should be noted that the present embodiment is arranged to trumpet-shaped first connection ring the 11, second connection ring 12
Two ends at pipeline acoustic filter 10；It is arranged on the first connection ring 11 (the i.e. the 3rd connection ring of the middle part of pipeline acoustic filter 10
14), the second connection ring 12 (the i.e. the 4th connects ring 15), owing to needing the sudden change of Formation cross-section, so that acoustic energy is lost, plays absorption sound
The effect of sound；Therefore, the first connection ring 11 (the i.e. the 3rd connects ring 14) of the middle part of pipeline acoustic filter 10, the second connection ring
Can not be arranged to be connected ring the 11, second connection ring 12 with the first of pipeline acoustic filter 10 two ends 12 (the i.e. the 4th connects ring 15) identical
Shape.Preferably, the 3rd surface connecting ring the 14, the 4th connection ring 15 is plane, and is perpendicular in pipeline acoustic filter 10
Mandrel.
Generally, the pipeline 20 of channeling fluid is pipe, and has identical internal diameter in each position, in order to make
One connects ring the 11, second connection ring the 12, the 3rd connection ring the 14, the 4th connection ring 15 all can fit with the inwall of pipeline 20；Cause
This, all connection rings of the pipeline acoustic filter 10 in the present embodiment are the annulus being coaxially disposed, and all connection rings have identical
External diameter.
With reference to Fig. 1, Fig. 3, the effect of through hole 13a is to connect the first cavity aa and mozzle 13, in order to enable a fluid to
Circulate more smoothly between the first cavity aa and mozzle 13, at least provided with two through hole 13a on the tube wall of mozzle 13,
Through hole 13a is uniformly distributed along the circumference of mozzle 13.The most in the present embodiment, the tube wall of mozzle 13 is arranged four to lead to
Hole 13a, four through hole 13a are uniformly distributed along the circumference of mozzle 13.
With continued reference to Fig. 1, the 3rd connects ring the 14, the 4th connection ring 15 is connected by muscle 16, and muscle 16 is positioned at the 3rd connection ring
14, the radial outer edge of the 4th connection ring 15.The effect of muscle 16 is that fixing the 3rd connection ring 14 and the 4th that connects connects ring 15.Tool
Body in the present embodiment, connects the 3rd and is provided with four articles of muscle 16 between ring the 14, the 4th connection ring 15, and along pipeline acoustic filter 10
Circumference be uniformly distributed；Muscle 16 also has certain amount of deflection, i.e. muscle 16 and certain bending can be occurred to deform, therefore, it is possible to subtract
There is the possibility of fracture in little pipeline acoustic filter 10.
With reference to Fig. 2, when pipeline acoustic filter 10 has multiple Helmholtz muffler section 10a, in axial direction x, each hertz of nurse
The most hereby muffler section 10a has different length, and each mozzle 13 has different diameters；This is because: Helmholtz acoustic filter
The noise in the range of certain frequency can only be eliminated, but by regulating length and the internal diameter of mozzle 13, can regulate and specifically be wanted
The noise frequency range value eliminated.
When pipeline acoustic filter 10 has multiple expansion muffler section 10b, along described axial direction x, each expansion muffler section 10b
There is different length；This is because: expansion muffler also can only eliminate the noise in the range of certain frequency, but by regulation
The length of expansion muffler section 10b, can regulate frequency range value to be eliminated.
In the present embodiment, first connects ring the 11, second connection ring the 12, the 3rd connection ring the 14, the 4th connection ring 15 is respectively provided with
Identical outer diameter D0.In axial direction x, be respectively provided with first Helmholtz muffler section 10a, first expansion muffler section 10b,
Second Helmholtz muffler section 10a, second expansion muffler section 10b, the 3rd Helmholtz muffler section 10a.Below first
As a example by individual Helmholtz muffler section 10a, first expansion muffler section 10b, illustrate different size to pipeline acoustic filter 10 institute
Frequency range and the amplitude that can eliminate the noise illustrate.
With continued reference to Fig. 2, a length of L of first Helmholtz muffler section 10a1, the length of first expansion muffler section 10b
Degree is L2；The internal diameter of first mozzle 13 is D1, the internal diameter of the through hole on first mozzle 13 is d1, height is h1。
Helmholtz muffler section 10a, it eliminates noise and has frequency domain narrow-band characteristic, can enter the noise of opposite, narrow frequency band
Row noise reduction.If increasing L1、D1, then can be by increasing the pipe internal volume of mozzle 13, so that Helmholtz muffler section 10a institute
The frequency corresponding to noise that can eliminate reduces, and i.e. can eliminate the noise of relatively low frequency range；If reducing L1、D1, then can pass through
Reduce the pipe internal volume of mozzle 13, so that the frequency corresponding to noise that Helmholtz muffler section 10a can eliminate raises,
I.e. can eliminate the noise of relatively high frequency range.
The internal diameter d of through hole 13a1With height h1Also noise frequency range value to be eliminated for Helmholtz muffler section 10a is produced shadow
Ring.If increasing internal diameter d1, then can be by increasing the sectional area of through hole 13a, so that Helmholtz muffler section 10a can eliminate
The frequency corresponding to noise raise, i.e. can eliminate the noise of relatively high frequency range；If increasing height h1, then He Muhuo can be made
The frequency corresponding to noise that hereby muffler section 10a can eliminate reduces, and i.e. can eliminate the noise of relatively low frequency range.
Expansion muffler section 10b, it eliminates noise and has frequency domain broadband properties, can disappear the most wide band noise
Sound.If increasing the divergence ratio (D of expansion acoustic filter0/D1), then can increase the amplitude of noise transmission loss, i.e. have and preferably disappear
Sound effective value.
If increasing L2, then the frequency corresponding to noise that expansion muffler section 10b can be made to eliminate reduces, and i.e. can disappear
Noise except relatively low frequency range.
Therefore, by each Helmholtz muffler section 10a, the size of expansion muffler section 10b in regulation pipeline acoustic filter 10
Parameter, in conjunction with Helmholtz acoustic filter, the characteristic of expansion muffler, it is possible to eliminate the different noises on different frequency range.
Second embodiment
Compared to first embodiment, the difference of the present embodiment is: adjacent Helmholtz muffler section 10a, expansion
Muffler section 10b does not share and connects ring.
With reference to Fig. 4, pipeline acoustic filter 10 has two Helmholtz muffler section 10a, an expansion muffler section 10b.He Mu
The most hereby muffler section 10a includes that the first connection ring 11 and second that in axial direction x sets gradually connects ring 12, and first connects ring
11, between the second connection ring 12, mozzle 13 is set；Expansion muffler section 10b includes the 3rd company that in axial direction x sets gradually
T-Ring the 14, the 4th connects ring 15, and the 3rd connects ring the 14, the 4th connects the fixing connection of ring 15.First Helmholtz muffler section 10a
The second connection ring 12 is connected the fixing connection of ring 14, the 4th connection ring 15 and second Helmholtz muffler section 10a with the 3rd
First connects the fixing connection of ring 11.
The noise-cancelling theory of the pipeline acoustic filter 10 in the present embodiment is former with the noise elimination of the pipeline acoustic filter in first embodiment
Reason is similar, repeats no more.
Although this utility model discloses as above, but this utility model is not limited to this.Any those skilled in the art,
Without departing from spirit and scope of the present utility model, all can make various changes or modifications, protection domain the most of the present utility model
Should be as the criterion with claim limited range.
Claims (12)
1. a pipeline acoustic filter, it is characterised in that including:
The Helmholtz muffler section that in axial direction sets gradually, expansion muffler section；
Described Helmholtz muffler section includes:
First connects ring, the second connection ring, and described first connection ring, the second connection ring set gradually along described axial direction, and
Described first connect ring, second connect ring centre bore relative；
Mozzle, connects between ring, the second connection ring described first, and two mouths of pipe of mozzle are respectively with described first even
T-Ring, the second centre bore connecting ring connect, and the tube wall of described mozzle has through hole；
Described expansion muffler section includes:
3rd connects ring, the 4th connection ring, and described 3rd connection ring, the 4th connection ring set gradually along described axial direction, and
Described 3rd connect ring, the 4th connect ring centre bore relative；Described 3rd connects ring, the 4th fixing connection of connection ring.
2. pipeline acoustic filter as claimed in claim 1, it is characterised in that along described axial direction, described Helmholtz is eliminated the noise
Section, expansion muffler section are arranged alternately.
3. pipeline acoustic filter as claimed in claim 2, it is characterised in that adjacent described Helmholtz muffler section, expansion disappear
Sound section shares one and connects ring.
4. pipeline acoustic filter as claimed in claim 1, it is characterised in that along described axial direction, described pipeline acoustic filter
First muffler section is Helmholtz muffler section；
The entrance point of described pipeline acoustic filter arranges described first and connects ring, along described axial direction, from being positioned at pipeline acoustic filter
One end that first connection ring of entrance point is connected with mozzle is to first other end connecting ring, and described first connects the center of ring
The increasing diameter in hole.
5. pipeline acoustic filter as claimed in claim 1, it is characterised in that along described axial direction, described pipeline acoustic filter
Last muffler section is Helmholtz muffler section；
The port of export of described pipeline acoustic filter arranges the second connection ring, along described axial direction, from being positioned at pipeline muffler outlet
One end that second connection ring of end is connected with mozzle is to second other end connecting ring, and described second connects the centre bore of ring
Increasing diameter.
6. pipeline acoustic filter as claimed in claim 1, it is characterised in that described 3rd connection ring, the 4th connection ring are perpendicular to
The central shaft of described pipeline acoustic filter.
7. pipeline acoustic filter as claimed in claim 1, it is characterised in that all of connection ring is the annulus being coaxially disposed, and
All of connection ring has identical external diameter.
8. pipeline acoustic filter as claimed in claim 1, it is characterised in that in a described Helmholtz muffler section is described logical
Hole at least two, is uniformly distributed along described mozzle circumference.
9. pipeline acoustic filter as claimed in claim 1, it is characterised in that described 3rd connection ring, the 4th connection ring pass through muscle
Connecting, described muscle is positioned at the described 3rd and connects ring, the radial outer edge of the 4th connection ring.
10. pipeline acoustic filter as claimed in claim 1, it is characterised in that when pipeline acoustic filter has multiple described He Muhuo
Hereby during muffler section, each Helmholtz muffler section has different length；And/or, the mozzle of each Helmholtz muffler section has
Different internal diameters.
11. pipeline acoustic filters as claimed in claim 1, it is characterised in that disappear when pipeline acoustic filter has multiple described expansion
During sound section, each expansion muffler section has different length.
12. pipeline acoustic filters as claimed in claim 1, it is characterised in that also including first sleeve, described first sleeve is sheathed
Outside described mozzle, the two ends of described first sleeve are fixing connects described first connection ring, the second connection ring；And/or,
Described pipeline acoustic filter also includes the second sleeve pipe, the two ends of described second sleeve pipe are fixing connect the described 3rd connect ring, the
Four connect ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620844718.3U CN205842088U (en) | 2016-08-05 | 2016-08-05 | Pipeline acoustic filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620844718.3U CN205842088U (en) | 2016-08-05 | 2016-08-05 | Pipeline acoustic filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205842088U true CN205842088U (en) | 2016-12-28 |
Family
ID=57616958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620844718.3U Expired - Fee Related CN205842088U (en) | 2016-08-05 | 2016-08-05 | Pipeline acoustic filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205842088U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111022813A (en) * | 2019-12-03 | 2020-04-17 | 四川大学 | Porous current-limiting noise-reducing pore plate and current-limiting noise reducer formed by same |
-
2016
- 2016-08-05 CN CN201620844718.3U patent/CN205842088U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111022813A (en) * | 2019-12-03 | 2020-04-17 | 四川大学 | Porous current-limiting noise-reducing pore plate and current-limiting noise reducer formed by same |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161228 |
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| CF01 | Termination of patent right due to non-payment of annual fee |