CN111364631A - Building outer wall sound insulation noise reduction equipment - Google Patents

Building outer wall sound insulation noise reduction equipment Download PDF

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Publication number
CN111364631A
CN111364631A CN202010224237.3A CN202010224237A CN111364631A CN 111364631 A CN111364631 A CN 111364631A CN 202010224237 A CN202010224237 A CN 202010224237A CN 111364631 A CN111364631 A CN 111364631A
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CN
China
Prior art keywords
sound insulation
fixedly connected
sound
plate
building
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Granted
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CN202010224237.3A
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Chinese (zh)
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CN111364631B (en
Inventor
鲁婵
赵先超
王川
曹诗怡
李伟
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Hunan University of Technology
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Hunan University of Technology
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Priority to CN202010224237.3A priority Critical patent/CN111364631B/en
Publication of CN111364631A publication Critical patent/CN111364631A/en
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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/38Connections for building structures in general
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62Insulation or other protection; Elements or use of specified material therefor
    • E04B1/66Sealings
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/76Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only
    • E04B1/78Heat insulating elements
    • E04B1/80Heat insulating elements slab-shaped
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/84Sound-absorbing elements
    • E04B1/86Sound-absorbing elements slab-shaped
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62Insulation or other protection; Elements or use of specified material therefor
    • E04B1/92Protection against other undesired influences or dangers
    • E04B1/94Protection against other undesired influences or dangers against fire
    • E04B1/941Building elements specially adapted therefor
    • E04B1/942Building elements specially adapted therefor slab-shaped
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B2/00Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00Adapting or protecting infrastructure or their operation
    • Y02A30/24Structural elements or technologies for improving thermal insulation
    • Y02A30/242Slab shaped vacuum insulation
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B80/00Architectural or constructional elements improving the thermal performance of buildings
    • Y02B80/10Insulation, e.g. vacuum or aerogel insulation

Abstract

The invention relates to the technical field of building equipment, in particular to sound insulation and noise reduction equipment for an outer wall of a building, which comprises a fixed frame, wherein mounting mechanisms are arranged on the left side and the right side of the fixed frame, a first sound insulation mechanism is arranged at the top of the inner side of the fixed frame, a second sound insulation mechanism is arranged on the lower side of the first sound insulation mechanism, and a sound absorption mechanism is arranged on the lower side of the second sound insulation mechanism. The operation procedure is simplified, and the installation efficiency is improved.

Description

Building outer wall sound insulation noise reduction equipment
Technical Field
The invention relates to the technical field of building equipment, in particular to sound insulation and noise reduction equipment for a building outer wall.
Background
Walls are important components of buildings. It is used for bearing, enclosing or separating space. The wall body is divided into a bearing wall and a non-bearing wall according to the self-stress condition and the material type of the wall body, and is divided into a solid wall, a sintered hollow brick wall, a cavity wall and a composite wall according to the construction mode of the wall body. The wall body is generally divided into an outer wall and an inner wall according to the position of the wall body, and each part has a longitudinal direction and a transverse direction respectively, so that four kinds of wall bodies, namely a longitudinal outer wall, a transverse outer wall, a longitudinal inner wall and a transverse inner wall, are formed by the same shape.
Although the existing building outer wall has a certain noise reduction function, the sound insulation effect is poor, sound cannot be completely blocked to penetrate through the outer wall, so that the noise outside the building can interfere with people in the building and influence the work, study and sleep of people, and therefore, aiming at the current situation, the building outer wall sound insulation and noise reduction equipment is urgently needed to be developed to overcome the defects in the current practical application.
Disclosure of Invention
The invention aims to provide sound insulation and noise reduction equipment for an outer wall of a building, which aims to solve the problems in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a building outer wall gives sound insulation and falls equipment of making an uproar, includes fixed frame, the fixed frame left and right sides all is provided with installation mechanism, fixed frame inboard top is provided with first noise insulation mechanism, first noise insulation mechanism downside is provided with second noise insulation mechanism, second noise insulation mechanism downside is provided with inhales the sound mechanism.
As a further scheme of the invention: first noise insulation mechanism includes the acoustic celotex board, acoustic celotex board bottom fixed connection is provided with the heat insulating board, the acoustic celotex board bottom left and right sides all is provided with the spacing groove, the inboard fixed connection in fixed frame top is provided with the stopper corresponding with the spacing groove, the stopper inboard is provided with the fixture block, fixed connection is provided with the second spring between fixture block and the stopper, the acoustic celotex board inboard is provided with the draw-in groove corresponding with the fixture block.
As a further scheme of the invention: the second sound insulation mechanism includes that fixed connection sets up the vacuum box at fixed frame inboard, vacuum box top bolted connection is provided with the vacuum pump, the vacuum pump input is connected with the vacuum box, the vacuum box inboard is provided with vacuum sensor, the vacuum pump outside is provided with the protective frame with vacuum box bolted connection.
As a further scheme of the invention: be provided with coupling mechanism between first noise insulation mechanism and the second noise insulation mechanism, coupling mechanism includes the air duct, the air duct input is connected with the vacuum pump output, the air duct left and right sides output all sets up at the inboard fixed union coupling of fixed frame with fixed connection, the inboard fixed connection in fixed pipe top is provided with the second valve, both sides fixed pipe is close to the equal fixed connection in acoustic celotex board one side and is provided with the branch pipe, the inboard sliding connection of branch pipe is provided with the push pedal, the push pedal is close to acoustic celotex board one side fixed connection and is provided with the briquetting, both sides all are provided with the first spring with push pedal fixed connection about the briquetting, the first spring other end and fixed frame fixed connection, air duct top fixed connection is provided with the outlet duct, the inboard fixed connection of outlet duct.
As a further scheme of the invention: inhale sound mechanism and include that fixed connection sets up the backup pad at fixed frame inboard, both sides are provided with waterproof board and the PLASTIC LAMINATED with fixed frame bolted connection respectively about the backup pad, all be provided with between waterproof board and backup pad, PLASTIC LAMINATED and the backup pad and inhale the sound cotton, inhale and be connected through the adhesive between sound cotton and the backup pad.
As a further scheme of the invention: the installation mechanism includes that fixed connection sets up the installation piece in fixed frame left and right sides, be connected through building expansion anchor bolt between installation piece and the wall body.
As a further scheme of the invention: the first valve is a ball valve, and the second valve is a one-way pressure valve.
Compared with the prior art, the invention has the beneficial effects that:
1. by arranging the first sound insulation mechanism and the second sound insulation mechanism, sound absorption and noise reduction can be realized by utilizing the sound insulation plate and the vacuum box, sound is prevented from passing through a wall body, people in a building are prevented from being interfered by noise outside the building, and the life quality of people is improved;
2. by arranging the connecting mechanism, the firmness of connection between the sound insulation plate and the fixed frame can be enhanced, and the effectiveness of sound insulation is further ensured;
3. by arranging the sound absorption mechanism, sound can be well blocked from penetrating through the wall body by using the sound absorption cotton arranged on the two sides of the supporting plate, and the functionality of the device can be enhanced by arranging the waterproof plate and the fireproof plate;
4. through setting up installation mechanism, can realize the quick assembly disassembly between device and the wall body, simplify the operating procedure, improve the installation effectiveness.
Drawings
Fig. 1 is a schematic structural diagram of a sound insulation and noise reduction device for an external wall of a building.
Fig. 2 is an enlarged schematic view of a portion a in fig. 1.
Fig. 3 is a schematic perspective view of a sound insulation and noise reduction device for an exterior wall of a building.
In the figure: 1-fixing frame, 2-mounting block, 3-building expansion anchor bolt, 4-sound insulation board, 5-heat insulation board, 6-vacuum box, 7-vacuum sensor, 8-vacuum pump, 9-protective frame, 10-air guide pipe, 11-fixing pipe, 12-air outlet pipe, 13-first valve, 14-waterproof board, 15-support board, 16-sound-absorbing cotton, 17-fireproof board, 18-second valve, 19-branch pipe, 20-push board, 21-press block, 22-first spring, 23-limit block, 24-clamp block, 25-clamp groove and 26-second spring.
Detailed Description
The technical solution of the present patent will be described in further detail with reference to the following embodiments.
Reference will now be made in detail to embodiments of the present patent, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present patent and are not to be construed as limiting the present patent.
Example 1
Referring to fig. 1-3, in an embodiment of the present invention, a sound insulation and noise reduction apparatus for an external wall of a building includes a fixed frame 1, wherein mounting mechanisms are disposed on both left and right sides of the fixed frame 1, a first sound insulation mechanism is disposed on the top of the inner side of the fixed frame 1, a second sound insulation mechanism is disposed on the lower side of the first sound insulation mechanism, and a sound absorption mechanism is disposed on the lower side of the second sound insulation mechanism.
Example 2
In this embodiment, first noise insulation mechanism includes acoustic celotex board 4, 4 bottom fixed connection of acoustic celotex board are provided with heat insulating board 5, 4 bottom left and right sides of acoustic celotex board all are provided with the spacing groove, 1 inboard fixed connection in fixed frame top is provided with stopper 23 corresponding with the spacing groove, stopper 23 inboard is provided with fixture block 24, fixed connection is provided with second spring 26 between fixture block 24 and the stopper 23, 4 inboard of acoustic celotex board is provided with the draw-in groove 25 corresponding with fixture block 24.
In this embodiment, second noise insulation mechanism includes that fixed connection sets up the vacuum chamber 6 at fixed frame 1 inboard, 6 top bolted connection of vacuum chamber is provided with vacuum pump 8, the vacuum pump 8 input is connected with vacuum chamber 6, 6 inboards of vacuum chamber are provided with vacuum sensor 7, the vacuum pump 8 outside is provided with the protective frame 9 with 6 bolted connection of vacuum chamber, through setting up first noise insulation mechanism and second noise insulation mechanism, utilizes acoustic celotex board 4 and vacuum chamber 6, can realize inhaling the sound and fall making an uproar, avoids sound to pass the wall body, makes people in the building avoid the interference of noise outside the building, does benefit to the quality of life who improves people.
In this embodiment, a connecting mechanism is arranged between the first sound-insulating mechanism and the second sound-insulating mechanism, the connecting mechanism includes an air duct 10, an input end of the air duct 10 is connected with an output end of a vacuum pump 8, output ends of left and right sides of the air duct 10 are both connected with a fixed tube 11 fixedly connected and arranged at an inner side of a fixed frame 1, a second valve 18 is fixedly connected and arranged at an inner side of a top end of the fixed tube 11, a branch tube 19 is fixedly connected and arranged at one side of the fixed tube 11 close to a sound-insulating plate 4, a push plate 20 is slidably connected and arranged at an inner side of the branch tube 19, a press block 21 is fixedly connected and arranged at one side of the push plate 20, a first spring 22 fixedly connected with the push plate 20 is arranged at upper and lower sides of the press block 21, the other end of the, the inboard fixed connection of outlet duct 12 is provided with first valve 13, through setting up coupling mechanism, can strengthen the fastness of being connected between acoustic celotex board 4 and the fixed frame 1, and then guarantees syllable-dividing validity.
In this embodiment, inhale the sound mechanism and include that fixed connection sets up the backup pad 15 at fixed frame 1 inboard, backup pad 15 is provided with waterproof board 14 and the PLASTIC LAMINATED 17 with fixed frame 1 bolted connection respectively about both sides, all be provided with between waterproof board 14 and backup pad 15, PLASTIC LAMINATED 17 and the backup pad 15 and inhale sound cotton 16, inhale and be connected through the adhesive between sound cotton 16 and the backup pad 15, inhale the sound mechanism through setting up, utilize the setting to inhale the cotton 16 sound that blocks that can be fine of sound in backup pad 15 both sides and pass the wall body, through setting up waterproof board 14 and PLASTIC LAMINATED 17, can strengthen the functionality of device.
In the embodiment, the installation mechanism comprises installation blocks 2 fixedly connected and arranged on the left side and the right side of the fixed frame 1, the installation blocks 2 are connected with the wall body through building expansion anchor bolts 3, and the installation mechanism can be arranged to realize the quick assembly and disassembly between the device and the wall body, simplify the operation procedure and improve the installation efficiency.
In this embodiment, the sound absorbing cotton 16 has a wavy longitudinal section.
In this embodiment, the first valve 13 is a ball valve, and the second valve 18 is a one-way pressure valve.
This equipment of making an uproar falls in building outer wall sound insulation, through setting up first noise insulation mechanism and second noise insulation mechanism, utilize acoustic celotex board 4 and vacuum chamber 6, can realize inhaling the sound and falling and making an uproar, avoid sound to pass the wall body, make the people in the building avoid the interference of building external noise, do benefit to the quality of life who improves people, through setting up coupling mechanism, can strengthen the fastness of being connected between acoustic celotex board 4 and the fixed frame 1, and then guarantee syllable-dividing validity, inhale the sound mechanism through setting up, utilize the setting to inhale the sound cotton 16 can be fine of inhaling of backup pad 15 both sides and block the sound and pass the wall body, through setting up waterproof board 14 and fireproof board 17, can strengthen the functionality of device, through setting up installation mechanism, can realize the quick assembly disassembly between device and the wall body.
The working principle of the invention is as follows: with acoustic celotex board 4 and fixed frame 1 joint, start vacuum pump 8, vacuum pump 8 is with 6 evacuation of vacuum chamber, air promotion push pedal 20 taken out, push pedal 20 drives briquetting 21 and fixes acoustic celotex board 4, unnecessary air is discharged from second valve 19, 3 with device and wall connection through building inflation crab-bolt, the noise that the external world produced, under acoustic celotex board 4 and vacuum chamber 6's effect, can realize inhaling the sound and fall making an uproar, thereby avoid sound to pass the wall body, make the people in the building avoid the interference of the external noise of building, and the setting is at the cotton 16 that blocks sound that 16 can be fine of inhaling of the sound of backup pad 15 both sides and is passed the wall body, effectively strengthen the syllable-dividing effect of device.
The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, it is possible to make several variations and modifications without departing from the concept of the present invention, and these should be considered as the protection scope of the present invention, which will not affect the effect of the implementation of the present invention and the utility of the patent.

Claims (7)

1. The utility model provides a building outer wall gives sound insulation and falls equipment of making an uproar, includes fixed frame (1), its characterized in that, the fixed frame (1) left and right sides all is provided with installation mechanism, fixed frame (1) inboard top is provided with first noise insulation mechanism, first noise insulation mechanism downside is provided with second noise insulation mechanism, second noise insulation mechanism downside is provided with inhales the sound mechanism.
2. The building outer wall sound insulation and noise reduction device according to claim 1, wherein the first sound insulation mechanism comprises a sound insulation plate (4), a heat insulation plate (5) is fixedly connected to the bottom of the sound insulation plate (4), limiting grooves are formed in the left side and the right side of the bottom end of the sound insulation plate (4), limiting blocks (23) corresponding to the limiting grooves are fixedly connected to the inner side of the top end of the fixing frame (1), clamping blocks (24) are arranged on the inner sides of the limiting blocks (23), second springs (26) are fixedly connected between the clamping blocks (24) and the limiting blocks (23), and clamping grooves (25) corresponding to the clamping blocks (24) are formed in the inner side of the sound insulation plate (4).
3. The sound insulation and noise reduction device for the external wall of the building as claimed in claim 2, wherein the second sound insulation mechanism comprises a vacuum box (6) fixedly connected and arranged on the inner side of a fixing frame (1), a vacuum pump (8) is arranged on the top of the vacuum box (6) in a bolted connection mode, the input end of the vacuum pump (8) is connected with the vacuum box (6), a vacuum sensor (7) is arranged on the inner side of the vacuum box (6), and a protection frame (9) in a bolted connection mode with the vacuum box (6) is arranged on the outer side of the vacuum pump (8).
4. The sound insulation and noise reduction equipment for the external wall of the building according to claim 3, wherein a connecting mechanism is arranged between the first sound insulation mechanism and the second sound insulation mechanism, the connecting mechanism comprises an air duct (10), the input end of the air duct (10) is connected with the output end of a vacuum pump (8), the output ends of the left side and the right side of the air duct (10) are respectively connected with a fixed pipe (11) fixedly connected and arranged at the inner side of a fixed frame (1), the inner side of the top end of the fixed pipe (11) is fixedly connected and provided with a second valve (18), the fixed pipes (11) at two sides are respectively fixedly connected and provided with a branch pipe (19) at one side close to the sound insulation plate (4), the inner sides of the branch pipes (19) are respectively connected and provided with a push plate (20) in a sliding manner, one side of the push plate (20) close to the sound insulation plate (4) is fixedly connected and provided with, the other end of the first spring (22) is fixedly connected with the fixed frame (1), the top of the air duct (10) is fixedly connected with an air outlet pipe (12), and the inner side of the air outlet pipe (12) is fixedly connected with a first valve (13).
5. The sound insulation and noise reduction device for the external wall of the building according to claim 1, wherein the sound absorption mechanism comprises a support plate (15) fixedly connected and arranged on the inner side of the fixing frame (1), a waterproof plate (14) and a fireproof plate (17) which are connected with the fixing frame (1) through bolts are respectively arranged on the upper side and the lower side of the support plate (15), sound absorption cotton (16) is arranged between the waterproof plate (14) and the support plate (15), between the fireproof plate (17) and the support plate (15), and the sound absorption cotton (16) and the support plate (15) are connected through adhesive glue.
6. The sound insulation and noise reduction device for the external wall of the building as claimed in claim 1, wherein the mounting mechanism comprises mounting blocks (2) fixedly connected and arranged at the left and right sides of the fixed frame (1), and the mounting blocks (2) are connected with the wall body through building expansion anchor bolts (3).
7. The sound insulation and noise reduction device for the external wall of the building as claimed in claim 4, wherein the first valve (13) is a ball valve, and the second valve (18) is a one-way pressure valve.
CN202010224237.3A 2020-03-26 2020-03-26 Building outer wall sound insulation noise reduction equipment Active CN111364631B (en)

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Application Number Priority Date Filing Date Title
CN202010224237.3A CN111364631B (en) 2020-03-26 2020-03-26 Building outer wall sound insulation noise reduction equipment

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Application Number Priority Date Filing Date Title
CN202010224237.3A CN111364631B (en) 2020-03-26 2020-03-26 Building outer wall sound insulation noise reduction equipment

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CN111364631A true CN111364631A (en) 2020-07-03
CN111364631B CN111364631B (en) 2021-05-04

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Cited By (2)

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Publication number Priority date Publication date Assignee Title
CN113323183A (en) * 2021-06-04 2021-08-31 重庆工程职业技术学院 Noise reduction structure of building outer wall
CN113977712A (en) * 2021-11-16 2022-01-28 李想 Plywood that possesses fire prevention function

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CN202611088U (en) * 2012-05-22 2012-12-19 中国三冶集团有限公司第三建筑工程公司 Building wallboard
CN206503252U (en) * 2017-02-12 2017-09-19 邵民 The external heated board apparatus of civil building engineering wall
CN206655419U (en) * 2017-03-15 2017-11-21 陆伟东 A kind of indoor decorating thermal insulation board
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113323183A (en) * 2021-06-04 2021-08-31 重庆工程职业技术学院 Noise reduction structure of building outer wall
CN113323183B (en) * 2021-06-04 2022-11-29 重庆工程职业技术学院 Noise reduction structure of building outer wall
CN113977712A (en) * 2021-11-16 2022-01-28 李想 Plywood that possesses fire prevention function

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