CN106812034A - A kind of high-speed railway track bed sound absorber - Google Patents
A kind of high-speed railway track bed sound absorber Download PDFInfo
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- CN106812034A CN106812034A CN201710210083.0A CN201710210083A CN106812034A CN 106812034 A CN106812034 A CN 106812034A CN 201710210083 A CN201710210083 A CN 201710210083A CN 106812034 A CN106812034 A CN 106812034A
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- sound absorber
- railway roadbed
- track bed
- interior
- speed railway
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B19/00—Protection of permanent way against development of dust or against the effect of wind, sun, frost, or corrosion; Means to reduce development of noise
- E01B19/003—Means for reducing the development or propagation of noise
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Railway Tracks (AREA)
Abstract
The invention discloses a kind of high-speed railway track bed sound absorber, including it is layed in two rails（2）Between railway roadbed on interior sound absorber（3）Be layed in two rails（2）Outer sound absorber on the railway roadbed of outside（4）Composition, inside and outside sound absorber（3,4）It is polymer particle sound absorber, interior sound absorber（3）Inside has the first arc-shaped cavity（5）, the first arc-shaped cavity（5）Resonance sound-absorbing structure, inside and outside sound absorber are formed between railway roadbed（3,4）It is provided with avoidance breach（7）, adjacent two pieces of inside and outside sound absorbers（3,4）By tenon connection, outer sound absorber（4）On be additionally provided with the second arc-shaped cavity（10）.High-speed railway track bed sound absorber of the invention can effectively absorb the wheel-rail noise produced by bullet train, meanwhile, it also has the advantages that very strong water penetration, impact resistance, interchangeability, making high precision, suitable mass production.
Description
Technical field
The present invention relates to a kind of engineering noise reduction product, especially a kind of polymer particle sound absorption being layed on high-speed railway track bed
Body.
Background technology
With the construction of high-speed railway, the speed-raising of existing railway, the high speed and densification of railway transportation, and without the tiny fragments of stone, coal, etc.
A large amount of layings of track and application, daily life of the high-speed railway with us are closely related, and high-speed railway is to ours
Life is while bring convenience, the problems such as also generate some side effects, such as noise pollution.
The noise of train is broadly divided into tractive squeal, wheel-rail noise and aerodynamic noise three major types, and three noise likes are to overall noise
Contribution amount it is relevant with speed；During low speed, tractive squeal is maximum to the contribution amount of overall noise, occupies an leading position, as train is transported
The raising of scanning frequency degree, wheel-rail noise will be occupied an leading position to the contribution amount of overall noise more than tractive squeal, work as train running speed
When further improving, aerodynamic noise will be occupied an leading position to the contribution amount of overall noise more than wheel-rail noise.
The noise of bullet train mainly includes wheel-rail noise and aerodynamic noise, and wheel-rail noise includes wheel rolling noise, impact
Noise and curve are uttered long and high-pitched sounds；Because the sweep of high-speed railway is very big, and rail generally uses gapless rail, therefore, at a high speed
The wheel-rail noise of railway is mainly Wheel/rail noise；Wheel/rail noise is to excite wheel, rail by wheel track surface roughness
Produced with Pumping ties, energy concentrated in 800-2500Hz this frequency range.
In American-European countries, wheel-rail noise causes great attention already, at present, in the prediction of wheel-rail noise and noise reduction side
The research in face has launched；In recent years, as high ferro enters overseas market so that the improvement for wheel-rail noise also becomes more next
It is more urgent.
At present, the existing railway roadbed sound absorber for wheel-rail noise design, solves noise pollution and asks to a certain extent
Topic；But, existing railway roadbed sound absorber occurs in that the following problem in actual use：
1. the sound absorbing mechanism of existing railway roadbed sound absorber is resistive sound absorption principle, the sound-absorbing material that it is used generally expanded pearlite
The light materials such as rock, porous ceramics, in order to resist the absorption affinity formed when train passes through, it is necessary to be fixed using bolt or be bonded solid
Determine mode sound absorber is fixed on railway roadbed, but, being fixedly connected using bolt can be occurred corrosion and asked because long-time is used
Topic, so as to produce later maintenance expense higher；And adhering fixed mode is used, peace can be produced because bonding agent occurs aging
Full potential problem.
2. draining is difficult；Because existing railway roadbed sound absorber is very poor without water penetration or water permeability, rainwater is caused to store
Can not in time be excluded in sound absorber, so that the load-bearing of bridge increases, increase railway construction cost；In addition, when sound absorption
When containing a certain amount of moisture in vivo, rainwater can be adsorbed onto train bottom by train by the absorption affinity for being formed at a high speed, so as to draw
Play the corrosion of metalwork and the damage of electric elements.
3. shock resistance is weak；After existing railway roadbed sound absorber installation, maintainer inevitably walks above, by
It is made of Lightweight acoustical material in existing railway roadbed sound absorber, so when maintainer overhauls on sound absorber, walks, easily will
It is damaged.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of high-speed railway track bed sound absorber, and the railway roadbed sound absorber has very
Good sqouynd absorption lowering noise performance, can effectively absorb the wheel-rail noise produced by bullet train, meanwhile, sound absorber of the invention is adopted
It is molded with polymer particle material, so it has very strong interchangeability, makes high precision, is adapted to mass production, and
Polymer particle sound absorber of the invention need to be only laid immediately on railway roadbed, so its installation is also very convenient.
The technical solution adopted for the present invention to solve the technical problems is：A kind of high-speed railway track bed sound absorber, including be layed in
Sound absorber on high-speed railway track bed, the sound absorber is by the interior sound absorber that is layed on the railway roadbed between two rails and is layed in two iron
Outer sound absorber composition on the outside of rail on railway roadbed, described inside and outside sound absorber is polymer particle sound absorber.
Further, the interior sound absorber inside has cavity structure, after interior sound absorber is layered on railway roadbed, its cavity and road
Resonance sound-absorbing structure is formed between bed.
Further, the interior sound absorber is shaped as cuboid, and the cavity is the length side along interior sound absorber
To first arc-shaped cavity for opening up, sound absorber at least a piece, interior sound absorption are equipped with railway roadbed along railway roadbed
The bearing of trend of body length is identical with the bearing of trend of railway roadbed.
Further, sound absorber in two pieces is equipped with railway roadbed along railway roadbed, sound absorber is near each in every piece
At least one cross section avoidance breach in a rectangular trapezoid is equipped with from the one side of sleeper.
Further, the top surface of the interior sound absorber is the cylinder risen and fallen with rule, the bus of cylinder is multi-section circular arc,
Broken line or smoothed curve.
Further, a cone boss and cone being mutually matched is respectively equipped with the forward and backward side of the interior sound absorber
Connected in star.
Further, the outer sound absorber is shaped as cuboid, along the road on the outside of two rails of railway roadbed
At least one piece outer sound absorber is equipped with bed respectively, the bearing of trend of outer sound absorption body length is identical with the bearing of trend of railway roadbed.
Further, the outer sound absorber is provided with least one avoidance breach, outer sound absorber near the one side of sleeper
On to be additionally provided with least one with described avoidance breach be in be alternately distributed and through the second horizontal arc-shaped cavity of outer sound absorber.
Further, the top surface of the outer sound absorber is the cylinder risen and fallen with rule, the bus of cylinder is multi-section circular arc,
Broken line or smoothed curve, further respectively have a cone boss being mutually matched on the forward and backward side of outer sound absorber and taper is recessed
Groove.
Further, permeability rate >=1.5 × 10 of the inside and outside sound absorber-2Cm/s, surface density >=165kg, shock resistance is strong
>=30 J/m of degree.
The beneficial effects of the invention are as follows：Railway roadbed sound absorber of the invention has very good sqouynd absorption lowering noise performance, can
The wheel-rail noise produced by bullet train is effectively absorbed, meanwhile, sound absorber of the invention is molded using polymer particle material,
So it has very strong interchangeability, makes high precision, it is adapted to mass production, and polymer particle sound absorber of the invention is only
Need to be laid immediately on railway roadbed, so its installation is also very convenient.
Brief description of the drawings
Fig. 1 is the structural representation of high-speed railway track bed sound absorber of the invention.
Fig. 2 is the structural representation of interior sound absorber.
Fig. 3 is the cross-sectional view of interior sound absorber.
Fig. 4 is the structural representation of outer sound absorber.
Fig. 5 is the cross-sectional view of outer sound absorber.
Marked in figure：1- high-speed railway track beds, 2- rails, sound absorber in 3-, the outer sound absorbers of 4-, the arc-shaped cavities of 5- first, 6-
Sleeper, 7- avoids breach, 8- cone bosses, 9- conical sockets, the arc-shaped cavities of 10- second.
Specific embodiment
The present invention is further described with reference to the accompanying drawings and examples.
As illustrated, high-speed railway track bed sound absorber of the invention, including the sound absorber on high-speed railway track bed 1 is layed in, the suction
Sound body is by the interior sound absorber 3 being layed on the railway roadbed between two rails 2 and the outer sound absorber being layed on the outside railway roadbed of two rail 2
4 compositions, described inside and outside sound absorber 3,4 is filed an application on July 22nd, 2014 using with applicant to State Patent Office
Application No.：The methods that 2014103477351 a kind of polymer particle acoustic board and preparation method thereof is used are made,
Inside and outside sound absorber 3,4 is made using mould unification, with very strong interchangeability, makes high precision, is especially suitable for batch
Metaplasia is produced.
The interior sound absorber 3 is shaped as cuboid, is equipped with railway roadbed in two pieces along railway roadbed and absorbed sound
Body 3, the bearing of trend of the length of interior sound absorber 3 is identical with the bearing of trend of railway roadbed；Obviously, it is layed in the interior sound absorber 3 on railway roadbed
Block number is determined according to the size of the width of ballast bed and interior sound absorber 3 itself between two rails 2, and interior sound absorber 3 itself
Size the factor such as is transported, is installed it is also necessary to take into account that can facilitate to it；It is respectively equipped with the forward and backward side of interior sound absorber 3
One cone boss 8 and conical socket 9 being mutually matched, by the mutual cooperation of the cone boss 8 and conical socket 9, can
To realize the tenon connection in adjacent two pieces between sound absorber 3, so that the extension side of the bearing of trend of interior sound absorber 3 and railway roadbed
To identical；Meanwhile, tenon connection structure is formed between each interior sound absorber 3, moreover it is possible to resist the absorption formed when bullet train passes through
Power, prevent interior sound absorber 3 from being adsorbed by bullet train, it is to avoid existing railway roadbed sound absorber is fixed or be adhesively fixed by using bolt
The problem brought；Obviously, the size of the cone boss 8 and conical socket 9 is determined according to the size of interior sound absorber 3,
As long as being cooperated both meeting, it is firm that sound absorber 3 in adjacent two pieces can be connected, its shape is also dependent on reality
Situation makes corresponding changes.
First arc-shaped cavity 5, interior suction are provided with inside interior sound absorber 3 along the length direction of the interior sound absorber 3
Helmholtz resonance sound absorption cavity configuration is formed after sound body 3 is layered on railway roadbed, between first arc-shaped cavity 5 and railway roadbed；Meanwhile, it is interior
The top surface of sound absorber 3 is set to the cylinder that there is rule to rise and fall, and the bus of cylinder is multi-section circular arc；Certainly, the bus of cylinder may be used also
Think multistage broken line or smoothed curve etc.；By setting the first arc resonance sound-absorbing chamber inside interior sound absorber 3, interior suction can be made
Sound body 3 has more preferable sound absorbing capabilities and broader sound sucting band；Risen by the way that the top surface of interior sound absorber 3 is configured with into rule
The cylinder of volt, not only increases the absorption area and sound absorbing capabilities of interior sound absorber 3, and also making the sound sucting band of interior sound absorber 3 becomes
It is more wide in range.
In order to railway roadbed is paved with to improve the overall sound absorbing capabilities of railway roadbed sound absorber, at the same be also avoided that interior sound absorber 3 with
There is position conflict in the sleeper 6 of the inner side of two rail 2, sound absorber 3 is distinguished on the one side of respective sleeper 6 in described two pieces
It is provided with three cross section avoidance breach 7 in a rectangular trapezoid, the position of three avoidance breach 7 and size and respective sleeper
6 positions are corresponding with size；Obviously, the quantity for avoiding breach 7 and the position on the side of interior sound absorber 3 are according in
What the distance between length and adjacent sleeper 6 of sound absorber 3 itself were determined.In addition, avoiding breach 7 is shaped to right angle
It is trapezoidal, the adjacent body portion of interior sound absorption 3 of first arc-shaped cavity 5 can be conveyed with thicker thickness, so as to make up because
The first arc-shaped cavity 5 is provided with interior sound absorber 3 and causes the partial intensities of interior sound absorber 3 on the top of the first arc-shaped cavity 5 too low
Defect.
The shape of the outer sound absorber 4 is also cuboid, its length and height with the length and height of interior sound absorber 3
Identical, its width is advisable with just being flushed with the railway roadbed edge in the outside of rail 2；Along railway roadbed transverse to the outside of two rail 2
The outer sound absorber 4 described in one piece, the bearing of trend of the length of outer sound absorber 4 and the bearing of trend phase of railway roadbed are equipped with railway roadbed respectively
Together；A cone boss 8 and conical socket 9 being mutually matched also is respectively equipped with the forward and backward side of outer sound absorber 4, is passed through
The mutual cooperation of the cone boss 8 and conical socket 9, it is possible to achieve the tenon connection between adjacent two pieces of outer sound absorbers 4, from
And make the bearing of trend of outer sound absorber 4 identical with the bearing of trend of railway roadbed；Meanwhile, form tenon connection between each outer sound absorber 4
Structure, moreover it is possible to resist the absorption affinity formed when bullet train passes through, prevent outer sound absorber 4 from being adsorbed by bullet train, it is to avoid existing
There is railway roadbed sound absorber to fix or be adhesively fixed brought problem by using bolt；Obviously, the cone boss 8 and taper are recessed
The size of groove 9 is determined according to the size of outer sound absorber 4, can be by adjacent two pieces of outer sound absorbers as long as meeting the two mutual cooperation
4 are connected firm, and its shape makes corresponding changes also dependent on actual conditions.
In order to increase the absorption area of outer sound absorber 4, strengthening the sound absorbing capabilities of outer sound absorber 4 and have outer sound absorber 4
There is broader sound sucting band, the cylinder that the top surface of outer sound absorber 4 is set to that there is rule to rise and fall, the bus of cylinder is multistage circle
Arc；Certainly, the bus of cylinder can also be multistage broken line or smoothed curve etc..
It is sound absorption properties with the entirety for improving railway roadbed sound absorber in order to outer sound absorber 4 to be laid on the position close proximity to rail 2
Can, three avoidance breach 7 are respectively equipped with the one side of respective sleeper 6 in two pieces of outer sound absorbers 4, it is located at outer sound absorption
The position of the three avoidance breach 7 on body 4 and size are corresponding with three avoidance breach 7 on interior sound absorber 3 respectively, from
And avoid outer sound absorber 4 that position occurs with the sleeper 6 in the outside of two rail 2 and conflict；Obviously, it is described avoid breach 7 quantity and
Position on the side of outer sound absorber 4 is that the distance between length and adjacent sleeper 6 according to outer sound absorber 4 itself is determined
's.
For the extra load-bearing railway roadbed cost of erection for mitigating the weight of outer sound absorber 4 to reduce the load-bearing of railway roadbed and thus bring
With being additionally provided with two on outer sound absorber 4 with described avoidance breach 7 in being alternately distributed and through the transverse direction of outer sound absorber 4
Second arc-shaped cavity 10.Obviously, the quantity and size of second arc-shaped cavity 10 are according to actual railway roadbed weighted design institute
Determine.
In order that inside and outside sound absorber of the invention 3,4 is respectively provided with good water permeability, inside and outside sound absorber 3,4 is being made
When, control the permeability rate of inside and outside sound absorber 3,4 >=1.5 × 10-2cm/s；Meanwhile, in order to improve the whole of inside and outside sound absorber 3,4
Body intensity, damages sound absorber when so as to avoid maintainer in inside and outside sound absorber 3, being overhauled on 4, walked, inside and outside making
During sound absorber 3,4, control the surface density of inside and outside sound absorber 3,4 >=165kg, impact strength >=30 J/m.
In sum, high-speed railway track bed sound absorber of the invention has very good sqouynd absorption lowering noise performance and sound absorption wider
Frequency band, covers the frequency range that the Wheel/rail noise of bullet train is concentrated（800-2500Hz）, it is possible to effectively
The wheel-rail noise produced by bullet train is absorbed, meanwhile, inside and outside sound absorber of the invention also has very good water penetration
Energy, impact resistance, very strong interchangeability, making high precision, are very suitable for mass production, also, of the invention inside and outside
Sound absorber need to be only laid immediately on high-speed railway track bed, so its installation is also very convenient.
Claims (10)
1. a kind of high-speed railway track bed sound absorber, including it is layed in high-speed railway track bed（1）On sound absorber, the sound absorber is by being layed in two
Rail（2）Between railway roadbed on interior sound absorber（3）Be layed in two rails（2）Outer sound absorber on the railway roadbed of outside（4）Composition,
It is characterized in that：Described inside and outside sound absorber（3,4）It is polymer particle sound absorber.
2. high-speed railway track bed sound absorber according to claim 1, it is characterised in that：The interior sound absorber（3）Inside has sky
Cavity configuration, interior sound absorber（3）After being layered on railway roadbed, resonance sound-absorbing structure is formed between its cavity and railway roadbed.
3. high-speed railway track bed sound absorber according to claim 2, it is characterised in that：The interior sound absorber（3）Be shaped as length
Cube shape, the cavity is along interior sound absorber（3）First arc-shaped cavity opening up of length direction（5）, along railway roadbed
Sound absorber at least a piece is equipped with railway roadbed（3）, interior sound absorber（3）The bearing of trend of length and the extension of railway roadbed
Direction is identical.
4. high-speed railway track bed sound absorber according to claim 3, it is characterised in that：Laid on railway roadbed along railway roadbed
There is sound absorber in two pieces（3）, sound absorber in two pieces（3）Near respective sleeper（6）One side on to be equipped with least one transversal
Face avoidance breach in a rectangular trapezoid（7）.
5. high-speed railway track bed sound absorber according to claim 3, it is characterised in that：The interior sound absorber（3）Top surface for tool
The cylinder of regular fluctuating, the bus of cylinder is multi-section circular arc, broken line or smoothed curve.
6. high-speed railway track bed sound absorber according to claim 4, it is characterised in that：The interior sound absorber（3）Forward and backward side
On be respectively equipped with a cone boss being mutually matched（8）And conical socket（9）.
7. high-speed railway track bed sound absorber according to claim 1, it is characterised in that：The outer sound absorber（4）Be shaped as length
Cube shape, along railway roadbed transverse to two rails（2）At least one piece outer sound absorber is equipped with the railway roadbed in outside respectively（4）, outward
Sound absorber（4）The bearing of trend of length is identical with the bearing of trend of railway roadbed.
8. high-speed railway track bed sound absorber according to claim 7, it is characterised in that：The outer sound absorber（4）Near sleeper
One side is provided with least one cross section avoidance breach in a rectangular trapezoid（7）, outer sound absorber（4）On be additionally provided with least one
With described avoidance breach（7）In being alternately distributed and through outer sound absorber（4）The second horizontal arc-shaped cavity（10）.
9. high-speed railway track bed sound absorber according to claim 8, it is characterised in that：The outer sound absorber（4）Top surface for tool
The cylinder of regular fluctuating, the bus of cylinder is multi-section circular arc, broken line or smoothed curve, outer sound absorber（4）Forward and backward side on
Further respectively have a cone boss being mutually matched（8）And conical socket（9）.
10. high-speed railway track bed sound absorber according to claim 1, it is characterised in that：The inside and outside sound absorber（3,4）It is saturating
Water rate >=1.5 × 10-2Cm/s, surface density >=165kg, impact strength >=30 J/m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710210083.0A CN106812034A (en) | 2017-03-31 | 2017-03-31 | A kind of high-speed railway track bed sound absorber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710210083.0A CN106812034A (en) | 2017-03-31 | 2017-03-31 | A kind of high-speed railway track bed sound absorber |
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| Publication Number | Publication Date |
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| CN106812034A true CN106812034A (en) | 2017-06-09 |
Family
ID=59116557
Family Applications (1)
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|---|---|---|---|
| CN201710210083.0A Pending CN106812034A (en) | 2017-03-31 | 2017-03-31 | A kind of high-speed railway track bed sound absorber |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108630188A (en) * | 2018-04-28 | 2018-10-09 | 中国铁道科学研究院铁道建筑研究所 | The processing technology of sound absorption structure, acoustic absorptive member, package system and sound absorption structure |
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| EP0771907A1 (en) * | 1995-11-06 | 1997-05-07 | Vossloh-Werke GmbH | Absorption body for the reduction of airborne noise |
| DE19706708A1 (en) * | 1997-02-20 | 1998-11-19 | Contitech Holding Gmbh | Acoustic damping for railway |
| CN104108902A (en) * | 2014-07-22 | 2014-10-22 | 四川正升声学科技有限公司 | Micro-particle sound-absorbing board and preparation method thereof |
| CN204898443U (en) * | 2015-05-25 | 2015-12-23 | 四川中昊创业高铁新技术开发有限公司 | Novel railway roadbed acoustic baffle |
| CN205376115U (en) * | 2015-12-15 | 2016-07-06 | 四川正升声学科技有限公司 | Polymerized particle acoustic absorber |
| CN205369570U (en) * | 2015-12-29 | 2016-07-06 | 四川正升声学科技有限公司 | Sound barrier acoustic baffle and sound absorbing structure thereof |
| CN205636377U (en) * | 2016-05-18 | 2016-10-12 | 湖北宇声环保科技有限公司 | Railway roadbed abatvoix |
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2017
- 2017-03-31 CN CN201710210083.0A patent/CN106812034A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0771907A1 (en) * | 1995-11-06 | 1997-05-07 | Vossloh-Werke GmbH | Absorption body for the reduction of airborne noise |
| DE19706708A1 (en) * | 1997-02-20 | 1998-11-19 | Contitech Holding Gmbh | Acoustic damping for railway |
| CN104108902A (en) * | 2014-07-22 | 2014-10-22 | 四川正升声学科技有限公司 | Micro-particle sound-absorbing board and preparation method thereof |
| CN204898443U (en) * | 2015-05-25 | 2015-12-23 | 四川中昊创业高铁新技术开发有限公司 | Novel railway roadbed acoustic baffle |
| CN205376115U (en) * | 2015-12-15 | 2016-07-06 | 四川正升声学科技有限公司 | Polymerized particle acoustic absorber |
| CN205369570U (en) * | 2015-12-29 | 2016-07-06 | 四川正升声学科技有限公司 | Sound barrier acoustic baffle and sound absorbing structure thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108630188A (en) * | 2018-04-28 | 2018-10-09 | 中国铁道科学研究院铁道建筑研究所 | The processing technology of sound absorption structure, acoustic absorptive member, package system and sound absorption structure |
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| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: Wenjiang District 611130 of Sichuan city of Chengdu province Chengdu Strait science and Technology Industry Development Park Haike Road West No. 57 Applicant after: Positive ascension environment Polytron Technologies Inc Address before: The western part of the Wenjiang science and Technology Park Hartcourt Road District of Chengdu City, Sichuan Province, No. 57 611130 Applicant before: Sichuan Zhengsheng Acoustic Technology Co., Ltd. |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170609 |
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| RJ01 | Rejection of invention patent application after publication |