CN104727241B - Integral type multilayer micro-perforated metallic sound barrier - Google Patents
Integral type multilayer micro-perforated metallic sound barrier Download PDFInfo
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- CN104727241B CN104727241B CN201510133015.XA CN201510133015A CN104727241B CN 104727241 B CN104727241 B CN 104727241B CN 201510133015 A CN201510133015 A CN 201510133015A CN 104727241 B CN104727241 B CN 104727241B
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- sound barrier
- plate
- curved surface
- acoustic board
- continuous circular
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F8/00—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
- E01F8/0005—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement
- E01F8/0035—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement with undulated surfaces
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F8/00—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
- E01F8/0005—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement
- E01F8/0023—Details, e.g. foundations
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F8/00—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
- E01F8/0005—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement
- E01F8/0047—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement with open cavities, e.g. for covering sunken roads
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The invention discloses an integral type multilayer micro-perforated metallic sound barrier. The barrier comprises supporting stand columns which are fixedly arranged along the two sides of a rail track at intervals, a group of metallic acoustic panel absorbers are fixedly hung on every two stand columns in vertical direction, each group of metallic acoustic panel absorbers are arranged into three layers, the three layers are hung on the corresponding stand columns respectively, intermediate frequency acoustic panel absorbers are arranged on the track traveling front face, high frequency acoustic panel absorbers are arranged on the track traveling back face, and low frequency acoustic panel absorbers are arranged in the middle. According to the barrier, multilayer micro-perforated acoustic panel absorber structures are adopted, the frequency division control over sound is achieved, no fiber sound absorption materials are added, the environmental pollution problem caused by flying-off of fiber and dust is completely eradicated, the acoustic panel absorbers of all layers absorb noise at different frequency, composite sound absorption chambers are formed, and the flexible connection among all parts enables the total sound barrier to become an acoustic product in real sense.
Description
Technical field
The invention belongs to railway operation noise abatement technical field, especially belongs to high-speed railway noise abatement technology, especially
It is related to a kind of monoblock type multilamellar microporous metallic sound barrier.
Background technology
Sound barrier is the facility inserted between sound source and recipient, makes sonic propagation have significant adding to decline
Subtract, so as to weaken the influence of noise in the certain area that recipient is located.
Existing noise barrier structure is more single, particularly metal sound barrier.Existing structure mostly is upright plate box-type, single
Addition fiber absorbing material in first plate casing.Connected H profile steel column and roadbed and bridge are rigid attachment, high-speed cruising
Train can destroy its structure, cause noise barrier stand column base flexible, in plugboard box body fiber absorbing material pile up, disperse.
The content of the invention
The present invention discloses a kind of monoblock type multilamellar microporous metallic sound barrier according to the deficiencies in the prior art.The present invention will
The problem of solution is that to improve a kind of more reasonable structure, no added sound-absorbing material, the more preferable monoblock type multilamellar of sqouynd absorption lowering noise performance micro-
Perforated metal sound barrier.
The present invention is achieved through the following technical solutions：
Monoblock type multilamellar microporous metallic sound barrier, including the support post that downline road both sides arranged for interval is fixed,
Vertically hang on per two support posts and fix one group of metallic panel absorber, it is characterised in that：Every group of acoustic board is three layers points
It is not suspended on support post, circuit driving face is intermediate frequency acoustic board, and the circuit driving back side is high frequency acoustic board, and centre is low frequency
Acoustic board.
The support post is the T-shaped column of shaped form.
The intermediate frequency acoustic board plate face generally curved surface, including top arc deflector and intermediate frequency curved surface continuous circular arc plate；
The steel plate that per group have 7 continuous circular arcs and prestressing force angle frame framework of the intermediate frequency curved surface continuous circular arc plate by roll forming
Into plate face is evenly arranged perforation；The top arc deflector is made up of the circular arc-shaped metal plate of the uniform close blind hole in surface.
Sound barrier is covered by the top arc deflector width more than sound barrier top cross-sectional width.
The low-frequency acoustical board plate face generally curved surface, including the flow-disturbing flat board and low frequency curved surface of top arc transition be continuous
Arc plate；The steel plate that per group have 7 continuous circular arcs and prestressing force angle steel of the low frequency curved surface continuous circular arc plate by roll forming
Framework is constituted；The flow-disturbing flat board and low frequency curved surface continuous circular arc plate plate face are evenly arranged perforation.
High frequency sound absorption plate surface generally plane, by roll forming the elliptic arc steel plate for having 2 kinds of curvature per group with
The weldering of prestressing force angle iron frame group is formed.
Cavity is formed between above-mentioned three layers of acoustic board, width increases cavity cross section successively from top to bottom.
The through hole that different pore size irregularly connects the adjacent sound barrier of Unit two is provided with the support post web.
Three layers of acoustic board is respectively hung with support post by damped elasticity rubber cushion and is connected.
Sound barrier of the present invention is made up of three layers of acoustic board, including intermediate frequency acoustic board, low-frequency acoustical board, high frequency acoustic board, is led to
Overdamp rubber cushion assembles integral formula sound barrier with the T-shaped column of shaped form；Intermediate frequency acoustic board is arranged with circuit driving face, according to
It is secondary to arrange low-frequency acoustical board, high frequency acoustic board again.
Intermediate frequency acoustic board is by the continuous circular arc punched steel plate and prestressing force angle frame of 7 kinds of radius of curvature of Jing rolls forming
Frame and the weldering of close blind hole water conservancy diversion arc plate group are formed.Hypomere continuous circular arc micropunch truss panel absorbs and eliminates Mid Frequency sound wave, on
End deflector is used to avoid to produce " sonic boom " during sound ray diffraction.
Low-frequency acoustical board plate is micro- by the continuous circular arc of 7 kinds of radius of curvature different from intermediate frequency acoustic board of Jing rolls forming
Punched steel plate is formed with prestressing force angle iron frame and the weldering of close perforation flow-disturbing flat board group.Hypomere continuous circular arc micropunch truss panel is inhaled
Receive and eliminate low frequency band sound wave, the close perforation flow-disturbing flat board in upper end abolishes air-flow wake resistance whirlpool, further eliminates the noise and subtracts energy noise reduction.
High frequency acoustic board is formed with the weldering of prestressing force angle iron frame group by the elliptic arc steel plate of two kinds of curvature of Jing rolls forming.
For absorbing and intercepting high band noise.
The present invention is effectively increased the specific surface area of sound barrier using continuous circular arc surface, while rigid surface is changed into
Elastic construction.And make sound wave change reflection wave path in reflection, cause difference, produce superposition, interfere so as to mutual
Offset and improve noise elimination noise reduction effect.
Three layers of truss panel are by damping the sound barrier list that rubber cushion forms a whole with the T-shaped support post connection of shaped form
Unit.The unit defines not wide cavity from top to bottom, eliminates the noise by micropore sound absorption, panel vibration and in cavity, cancels and passing
System sound-absorbing material.
The T-shaped support post of shaped form, is provided with the irregular through hole of different pore size on its web, by the sound barrier unit air of series connection
Air-flow insertion in chamber, causes abrupt interface to subtract using different apertures and can eliminate the noise.The T-shaped support post of shaped form adopts vertical direction
To circuit driving face warp architecture, bending curve is conducive to noise reflection to absorb；Cross section is T-shaped structure, and lower cross section is big
In top cross section, more stable reliability, T-shaped both sides hang the acoustic board of the adjacent Unit two of fixation respectively.The each part of the sound barrier
By damping rubber cushion resilient connection so that sound barrier possesses omnibearing degree of freedom.
The present invention adopts multilamellar Micropunch Acoustic Board structure, realizes the frequency dividing to sound and administers, absorbs sound without fiber
Material, has prevented fibre dust and has dispersed the environmental issue of pollution, each layer metallic panel absorber respectively to different frequency noise absorbent, and
Composite sound absorbing chamber is formed, the flexible connection between each part causes whole sound barrier to become the acoustic product of real meaning.
Description of the drawings
Fig. 1 is sound barrier planar structure schematic diagram of the present invention；
Fig. 2 is sound barrier unit side structure schematic diagram of the present invention；
Fig. 3 is sound barrier unit longitudinal middle part structural representation of the present invention, i.e. Figure 1A A faces structural representation；
Fig. 4 is sound barrier assembling isolating construction schematic diagram of the present invention；
Fig. 5 is support post side structure schematic diagram of the present invention；
Fig. 6 is support post positive structure schematic of the present invention；
Fig. 7 is intermediate frequency acoustic board dimensional structure diagram of the present invention；
Fig. 8 is intermediate frequency acoustic board continuous circular arc schematic diagram of the present invention；
Fig. 9 is low-frequency acoustical board dimensional structure diagram of the present invention；
Figure 10 is low-frequency acoustical board continuous circular arc schematic diagram of the present invention；
Figure 11 is high frequency acoustic board dimensional structure diagram of the present invention；
Figure 12 is high frequency acoustic board elliptic arc schematic diagram of the present invention.
In figure, 1 is acoustic board, and 2 is support post, and 3 is damped elasticity rubber cushion, and 11 is intermediate frequency acoustic board, and 11a is that intermediate frequency is bent
Face continuous circular arc plate, 11b is top arc deflector, and 12 is low-frequency acoustical board, and 12a is low frequency curved surface continuous circular arc plate, and 12b is disturbed
Levelling plate, 13 is high frequency acoustic board, and 13a is elliptic arc steel plate, and 21 is through hole, and 22 is acoustic board installing hole.
Specific embodiment
The present invention is specifically described below by embodiment, embodiment is served only for carrying out further the present invention
Explanation, it is impossible to be interpreted as limiting the scope of the invention, those skilled in the art makees according to the content of the invention described above
Some the nonessential modifications and adaptations for going out fall within the scope of protection of the invention.
With reference to Fig. 1 to Figure 12.
Monoblock type multilamellar microporous metallic sound barrier, including the support post 2 that downline road both sides arranged for interval is fixed,
Vertically hang on per two support posts 2 and fix one group of metallic panel absorber 1, every group of acoustic board 1 is suspended on support respectively for three layers
On column 2, circuit driving face is intermediate frequency acoustic board 11, and the circuit driving back side is high frequency acoustic board 13, and centre is low-frequency acoustical board
12。
Support post 2 is the T-shaped column of shaped form.
11 plate face of intermediate frequency acoustic board generally curved surface, including top arc deflector 11b and intermediate frequency curved surface continuous circular arc plate
11a；The steel plate that per group have 7 continuous circular arcs and prestressing force angle iron frame of the intermediate frequency curved surface continuous circular arc plate 11a by roll forming
Constitute, plate face is evenly arranged perforation；Top arc deflector 11b is made up of the circular arc-shaped metal plate of the uniform close blind hole in surface.
Sound barrier is covered by top arc deflector 11b width more than sound barrier top cross-sectional width.
12 plate face of low-frequency acoustical board generally curved surface, including the flow-disturbing flat board 12b and low frequency curved surface company of top arc transition
Continuous arc plate 12a；The steel plate and prestressing force that per group have 7 continuous circular arcs of the low frequency curved surface continuous circular arc plate 12a by roll forming
Angle iron frame is constituted；Flow-disturbing flat board 12b and low frequency curved surface continuous circular arc plate 12a plate faces are evenly arranged perforation.
13 surface of high frequency acoustic board generally plane, by roll forming the elliptic arc steel plate 13a for having 2 kinds of curvature per group with
The weldering of prestressing force angle iron frame group is formed.
Cavity is formed between three layers of acoustic board 1 of the invention, width increases cavity cross section successively from top to bottom.
The through hole 21 that different pore size irregularly connects the adjacent sound barrier of Unit two is provided with 2 web of support post.
Three layers of acoustic board 1 are respectively hung with support post 2 by damped elasticity rubber cushion 3 and are connected.
As shown in Figure 1, Figure 2, Figure 3 and Figure 4, Fig. 1 is one group of sound barrier planar structure schematic diagram, and setting is illustrate only in figure
One group of acoustic board 1 between two support posts 2.Fig. 2 is sound barrier unit side structure schematic diagram, the actually side of Fig. 1
Face structural representation.Fig. 3 is sound barrier unit longitudinal middle part structural representation, i.e. Figure 1A A faces structural representation.Fig. 4 sound barriers
Assembling isolating construction schematic diagram.Sound barrier support post 2 of the present invention is connected solid with railway basis by the prefabricated installation pedestal in bottom
It is fixed, there are rubber damping pad and base plate during connection between support post 2 and basis.Each acoustic board 1 arranges damping on angle iron frame
Elastic rubber fitting 3, is connected with support post 2 by damped elasticity rubber cushion 3.It is intermediate frequency acoustic board in rail track driving face
11, the circuit driving back side is high frequency acoustic board 13, and centre is low-frequency acoustical board 12.Cavity is formed between each acoustic board 1, cavity is horizontal
Section can adopt not wide structure, and width increases the hollow chamber cross section of this illustration successively from top to bottom.
As shown in Figure 5, Figure 6, Fig. 5 is support post side structure schematic diagram of the present invention；Fig. 6 be support post of the present invention just
Face structural representation；Different pore size is provided with 2 web of support post of the present invention and irregularly connects the logical of the adjacent sound barrier of Unit two
Hole 21, air-flow insertion in the sound barrier unit cavity that through hole 21 will be connected, causing abrupt interface to subtract using different apertures can disappear
Sound.Using vertical direction to circuit driving face warp architecture, bending curve is conducive to noise reflection to the T-shaped support post 2 of shaped form
Absorb；Cross section is T-shaped structure, and more than top cross section, more stable reliability, T-shaped both sides hang fixation to lower cross section respectively
The acoustic board 1 of adjacent Unit two.
As shown in Figure 7, Figure 8, Fig. 7 is intermediate frequency acoustic board dimensional structure diagram of the present invention；Fig. 8 is intermediate frequency sound absorption of the present invention
Plate continuous circular arc schematic diagram；11 plate face of intermediate frequency acoustic board generally curved surface in Fig. 7, the curved surface are vertical with support post 2 when mounted
Coordinate to arc, intermediate frequency acoustic board 11 includes top arc deflector 11b and intermediate frequency curved surface continuous circular arc plate 11a；Intermediate frequency curved surface
Continuous circular arc plate 11a is made up of with prestressing force angle iron frame the steel plate for having 7 continuous circular arcs per group of roll forming, and plate face is uniform
Arrangement perforation, perforation are not represented in figure；Top arc deflector 11b is by the circular arc-shaped metal of the uniform close blind hole in surface
Plate is constituted.Fig. 8 illustrates the curvilinear structures of one group of continuous circular arc, and this example continuous circular arc is arranged using Symmetrical Circular Arc, middle one compared with
Orthodrome, orthodrome both sides respectively have symmetrical three circular arc, and great circle arc convex surface is towards driving face, the circular arc half of 7 continuous circular arcs
Footpath can be with various；Prestressing force angle iron frame is used to shape intermediate frequency curved surface continuous circular arc plate 11a and installs damped elasticity rubber cushion 3；Top
The uniform close blind hole in portion circular arc deflector 11b surfaces, the close blind hole on the gentle surface of arc structure are conducive to avoiding producing during sound ray diffraction
Raw " sonic boom ", while adopt that sound barrier covering structure can further be improved sound barrier more than sound barrier top cross-sectional width
Water resistance.
As shown in Figure 9, Figure 10, Fig. 9 is low-frequency acoustical board dimensional structure diagram of the present invention；Figure 10 is that low frequency of the present invention is inhaled
Sound plate continuous circular arc schematic diagram；It is similar with intermediate frequency acoustic board 11,12 plate face of low-frequency acoustical board generally curved surface, including top arc
The flow-disturbing flat board 12b and low frequency curved surface continuous circular arc plate 12a of transition；Low frequency curved surface continuous circular arc plate 12a is by the every of roll forming
Group has the steel plate of 7 continuous circular arcs and prestressing force angle iron frame to constitute, radius and the intermediate frequency curved surface continuous circular arc of 7 continuous circular arcs
Radius is different；Flow-disturbing flat board 12b and low frequency curved surface continuous circular arc plate 12a plate faces are evenly arranged perforation, no table in figure of boring a hole
Illustrate；Low frequency curved surface continuous circular arc plate 12a absorbs and eliminates low frequency band sound wave, and flow-disturbing flat board 12b can abolish the resistance of air-flow wake flow
Power whirlpool, further eliminates the noise and subtracts energy noise reduction.
As shown in Figure 11, Figure 12, Figure 11 is high frequency acoustic board dimensional structure diagram of the present invention；Figure 12 is high frequency of the present invention
Acoustic board elliptic arc schematic diagram；13 surface of high frequency acoustic board generally plane, by the ellipse for having 2 kinds of curvature per group of roll forming
Arc steel plate 13a is formed with the weldering of prestressing force angle iron frame group.Figure 12 represents one group of elliptic arc structure, has big elliptic arc with little elliptic arc
It is in smoothing junction to constitute, opposing face of the big ellipse arc convex surface towards direction of traffic, i.e., towards on the outside of direction of traffic.
The present invention adopts three layers of 1 structure of acoustic board, and the ratio table of sound barrier is effectively increased using continuous circular arc surface
Area, while rigid surface is changed into elastic construction.And make sound wave change reflection wave path in reflection, cause difference, produce
It is raw to be superimposed, interfere and improve noise elimination noise reduction effect so as to cancel out each other.
Claims (8)
1. the support post that monoblock type multilamellar microporous metallic sound barrier, including downline road both sides arranged for interval is fixed, often
Vertically hang on two support posts and fix one group of metallic panel absorber, it is characterised in that：Every group of acoustic board is three layers of difference
It is suspended on support post, circuit driving face is intermediate frequency acoustic board, and the circuit driving back side is high frequency acoustic board, and centre is that low frequency is inhaled
Sound plate；The intermediate frequency acoustic board plate face generally curved surface, including top arc deflector and intermediate frequency curved surface continuous circular arc plate；It is described
Intermediate frequency curved surface continuous circular arc plate is made up of with prestressing force angle iron frame the steel plate for having 7 continuous circular arcs per group of roll forming, plate
Face is evenly arranged perforation；The top arc deflector is made up of the circular arc-shaped metal plate of the uniform close blind hole in surface.
2. monoblock type multilamellar microporous metallic sound barrier according to claim 1, it is characterised in that：The column is curve
The T-shaped support post of shape.
3. monoblock type multilamellar microporous metallic sound barrier according to claim 1, it is characterised in that：The top arc is led
Sound barrier is covered by stream plate width more than sound barrier top cross-sectional width.
4. monoblock type multilamellar microporous metallic sound barrier according to claim 1, it is characterised in that：The low-frequency acoustical board
Plate face generally curved surface, including the flow-disturbing flat board and low frequency curved surface continuous circular arc plate of top arc transition；The low frequency curved surface connects
Continuous arc plate is made up of with prestressing force angle iron frame the steel plate for having 7 continuous circular arcs per group of roll forming；The flow-disturbing flat board
Perforation is evenly arranged with low frequency curved surface continuous circular arc plate plate face.
5. monoblock type multilamellar microporous metallic sound barrier according to claim 1, it is characterised in that：The high frequency acoustic board
Surface generally plane, is formed by the elliptic arc steel plate for having 2 kinds of curvature per group and the weldering of prestressing force angle iron frame group of roll forming.
6. the monoblock type multilamellar microporous metallic sound barrier according to any one of claim 1 to 5, it is characterised in that：It is described
Cavity is formed between three layers of acoustic board, width increases cavity cross section successively from top to bottom.
7. monoblock type multilamellar microporous metallic sound barrier according to claim 6, it is characterised in that：The support post abdomen
The through hole that different pore size irregularly connects the adjacent sound barrier of Unit two is provided with plate.
8. monoblock type multilamellar microporous metallic sound barrier according to claim 6, it is characterised in that：Three layers of acoustic board
Respectively hung with support post by damped elasticity rubber cushion and be connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510133015.XA CN104727241B (en) | 2015-03-25 | 2015-03-25 | Integral type multilayer micro-perforated metallic sound barrier |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510133015.XA CN104727241B (en) | 2015-03-25 | 2015-03-25 | Integral type multilayer micro-perforated metallic sound barrier |
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| CN104727241A CN104727241A (en) | 2015-06-24 |
| CN104727241B true CN104727241B (en) | 2017-04-12 |
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| CN105823133B (en) * | 2016-05-31 | 2018-11-09 | 广东美的制冷设备有限公司 | Cabinet air-conditioner |
| CN107841960A (en) * | 2017-11-28 | 2018-03-27 | 佛山科学技术学院 | A kind of bridge sound-insulating structure of municipal works |
| CN110172932A (en) * | 2019-05-20 | 2019-08-27 | 成都中弘轨道交通环保产业股份有限公司 | Monoblock type super high strength concrete-micropore ceramics compound sound barrier and its manufacturing method |
| CN112681167B (en) * | 2020-12-22 | 2022-12-16 | 广西同扬建设工程有限公司 | Noise control sound insulation area for highway |
| CN114934459B (en) * | 2022-05-16 | 2023-09-01 | 中海环境科技(上海）股份有限公司 | Sound barrier structure for reducing noise of secondary structure of rail transit and design method |
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| JP2002227141A (en) * | 2001-02-05 | 2002-08-14 | Japan Highway Public Corp | Sound insulating wall |
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| CN103526700A (en) * | 2013-10-28 | 2014-01-22 | 陈松 | Acoustic barrier |
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| CN204510045U (en) * | 2015-03-25 | 2015-07-29 | 成都中弘轨道交通环保产业股份有限公司 | Monolithic multilayer microporous metallic sound barrier |
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2015
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10121599A (en) * | 1996-10-24 | 1998-05-12 | Nitto Boseki Co Ltd | Sound-proof wall |
| JP2002227141A (en) * | 2001-02-05 | 2002-08-14 | Japan Highway Public Corp | Sound insulating wall |
| CN2787715Y (en) * | 2005-04-22 | 2006-06-14 | 北京丰越达工贸有限公司 | Assembled sound-adsorbing and sound-insulating barrier |
| CN201339164Y (en) * | 2009-01-08 | 2009-11-04 | 焦映厚 | Novel road sound barrier |
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| CN104727241A (en) | 2015-06-24 |
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Address after: 610041, No. 12, building 56, Shuguang International Building, 25 Shuguang street, Chengdu hi tech Zone, Sichuan, China Co-patentee after: China National Railway Group Co.,Ltd. Patentee after: CHENGDU ZHONGHONG RAIL TRANSIT ENVIRONMENTAL PROTECTION INDUSTRY Co.,Ltd. Address before: 610041, No. 12, building 56, Shuguang International Building, 25 Shuguang street, Chengdu hi tech Zone, Sichuan, China Co-patentee before: CHINA RAILWAY Corp. Patentee before: CHENGDU ZHONGHONG RAIL TRANSIT ENVIRONMENTAL PROTECTION INDUSTRY Co.,Ltd. |
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Effective date of registration: 20200612 Address after: No. 1224 and 1225, floor 12, building 1, No. 56, Tianhui middle street, hi tech Zone, Chengdu, Sichuan Co-patentee after: Beijing zhongtieke Information Consulting Co.,Ltd. Patentee after: CHENGDU ZHONGHONG RAIL TRANSIT ENVIRONMENTAL PROTECTION INDUSTRY Co.,Ltd. Address before: 610041, No. 12, building 56, Shuguang International Building, 25 Shuguang street, Chengdu hi tech Zone, Sichuan, China Co-patentee before: China National Railway Group Co.,Ltd. Patentee before: CHENGDU ZHONGHONG RAIL TRANSIT ENVIRONMENTAL PROTECTION INDUSTRY Co.,Ltd. |