CN113323183A - Noise reduction structure of building outer wall - Google Patents

Noise reduction structure of building outer wall Download PDF

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Publication number
CN113323183A
CN113323183A CN202110625934.4A CN202110625934A CN113323183A CN 113323183 A CN113323183 A CN 113323183A CN 202110625934 A CN202110625934 A CN 202110625934A CN 113323183 A CN113323183 A CN 113323183A
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plate
vertical
gear
moving plate
noise reduction
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CN113323183B (en
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覃娅
黄治国
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Chongqing Vocational Institute of Engineering
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Chongqing Vocational Institute of Engineering
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    • 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
    • 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
    • E04B1/62Insulation 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

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Acoustics & Sound (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Motor Or Generator Frames (AREA)
  • Finishing Walls (AREA)

Abstract

The invention belongs to the technical field of building design, and particularly relates to a noise reduction structure of a building outer wall, which comprises a lower supporting plate, a transverse moving plate, a vertical plate, an upper supporting plate, a vertical rod, a longitudinal moving plate and a noise reduction assembly, wherein the lower supporting plate is fixedly connected with the vertical plate; the lower supporting plate and the upper supporting plate can be fixedly arranged on an outer wall, the lower supporting plate corresponds to the bottom of a first floor, and the upper supporting plate corresponds to the top of a second floor; the transverse moving plate is arranged on the lower supporting plate in a transverse sliding manner; the two vertical plates are fixedly arranged at the left end and the right end of the transverse moving plate, the vertical rod is fixedly arranged in the middle of the transverse moving plate, and the tops of the vertical plates and the top of the vertical rod are fixed with the upper supporting plate; the longitudinal moving plate can be sleeved outside the vertical plate and the vertical rod in a vertically sliding manner; the noise reduction assembly is arranged at the outer end of the upper surface of the longitudinal moving plate. The invention can meet the special requirements of duplex residents on sound insulation and noise reduction in daytime and at night, and is suitable for market popularization and use.

Description

Noise reduction structure of building outer wall
Technical Field
The invention belongs to the technical field of building design, and particularly relates to a noise reduction structure of a building outer wall.
Background
From the architectural perspective, the boundary member for enclosing a building to form an indoor space and an outdoor space is called an outer wall. It has the functions of: bear certain load, shelter from wind and rain, preserve heat and insulate heat, prevent noise, prevent fire and be safe, etc. However, the noise reduction effect of the existing outer wall is poor, and particularly in areas with more pedestrian volume, external sound can pass through the outer wall and be transmitted indoors, so that residents who have a rest indoors are affected.
Chinese patent application No. CN201911236851.5 discloses a noise reduction structure for external walls of buildings, which comprises a frame, pipes and a sound absorption board installed in the right opening of the frame, wherein more than one partition board is installed inside the frame, more than one soil storage area is separated from the inside of the frame through the partition boards, soil layers are all arranged inside the soil storage areas, a through hole is arranged in the middle of each partition board, a nylon net covering the soil storage areas is also installed inside the frame, more than one lawn is planted on the surface of the nylon net, the root system of the lawn is fixed in the soil layers through the mesh on the nylon net, a steel wire mesh for positioning the lawn is installed in the opening on the left side of the frame, a round hole is arranged right at the through hole on the top surface and the bottom surface of the frame, a bearing is installed in the round hole on the upper end, the pipes are arranged inside the frame, the upper ends of the pipes pass through the through holes, and a circle of the pipes is expanded outwards to form a connection pipe, the connecting pipe is inserted into the inner ring of the bearing and is welded and fixed with the inner ring, and the lower end of the pipeline penetrates through the through hole and the round hole at the lower end and extends to the outside; one section of the pipeline positioned in the soil storage area forms a bent part with a U-shaped structure, and the inner sides of the bent parts are provided with water dripping heads; a limiting groove is vertically arranged on the inner wall surface of the connecting pipe, rubber layers are arranged in the inner wall surface of the connecting pipe and the limiting groove, and one end of the lower end of the pipeline, which is positioned outside, protrudes outwards to form a limiting block matched with the limiting groove; the inner wall surfaces of the through holes are all provided with rubber rings, and the inner wall surfaces of the rubber rings are all abutted against the outer wall surface of the pipeline; the sound-absorbing plate comprises a waterproof shell, a plurality of aluminum honeycomb perforated sound-absorbing plates filled in the waterproof shell and a mounting assembly mounted on the back of the waterproof shell, and honeycomb holes of two adjacent aluminum honeycomb perforated sound-absorbing plates are arranged in a staggered manner; and a layer of sound-absorbing glass wool is filled between every two adjacent aluminum honeycomb perforated sound-absorbing boards.
However, the above prior art still has the following problems:
the spring layer is a very popular novel residential building form and is widely favored by people. Daytime, indoor resident most time all is in the activity of first floor, and evening, and indoor resident most time then shifts to the second floor and has a rest, and the noise of daytime is different with evening moreover, and indoor resident is different to the demand of making an uproar that falls that gives sound insulation. The prior art can not satisfy the particularity, so that the experience of sound insulation and noise reduction is poor, and the requirements of people can not be satisfied.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a noise reduction structure for an outer wall of a building, which is used for solving the problem that the special requirements of duplex residents on sound insulation and noise reduction in daytime and at night cannot be met due to unreasonable noise reduction design of the existing outer wall.
In order to solve the technical problems, the invention adopts the following technical scheme:
a noise reduction structure of a building outer wall comprises a lower supporting plate, a transverse moving plate, a vertical plate, an upper supporting plate, a vertical rod, a longitudinal moving plate and a noise reduction assembly;
the lower supporting plate and the upper supporting plate can be fixedly arranged on an outer wall, the lower supporting plate corresponds to the bottom of a first floor, and the upper supporting plate corresponds to the top of a second floor;
the transverse moving plate is arranged on the lower supporting plate in a transverse sliding manner;
the two vertical plates are fixedly arranged at the left end and the right end of the transverse moving plate, the vertical rod is fixedly arranged in the middle of the transverse moving plate, and the tops of the vertical plates and the top of the vertical rod are fixed with the upper supporting plate;
the longitudinal moving plate can be sleeved outside the vertical plate and the vertical rod in a vertically sliding manner;
the noise reduction assembly is arranged at the outer end of the upper surface of the longitudinal moving plate.
Further, the lower supporting plate is formed by integrally forming a lower horizontal plate and a lower vertical plate, the lower vertical plate is located below the lower horizontal plate, the lower vertical plate can be detachably connected with an outer wall, the outer end edge and the inner end edge of the lower horizontal plate are vertically turned upwards to form a guide strip, and a transverse rack is arranged on the inner side of the upper surface of the lower horizontal plate.
Further, at least two guide wheels are installed at the position, opposite to the guide strips, of the lower surface of the transverse moving plate, the guide wheels are in sliding fit with the guide strips, a first motor is installed on the transverse moving plate, a first gear is installed on a power output shaft of the first motor, and the first gear penetrates through the transverse moving plate and is meshed with the transverse rack.
Further, last backup pad by last horizontal plate and last vertical plate integrated into one piece, last vertical plate be located the top of last horizontal plate, last vertical plate can dismantle with the outer wall and be connected.
Further, the inside wall fixed mounting of pole setting has vertical rack, the upper surface inner fixed mounting of longitudinal moving plate has the second motor, the power output shaft of second motor installs the second gear, second gear and vertical rack intermeshing.
Further, the outer end middle part integrated into one piece of longitudinal movement board has the mounting panel, the lower fixed surface of mounting panel installs the direction rack, the mounting panel outer sliding sleeve be equipped with the sliding frame, sliding frame bottom install the third motor, the power output shaft of third motor installs the third gear, third gear and direction rack intermeshing.
Further, a fourth motor is installed at the top of the sliding frame, a fourth gear is installed on a power output shaft of the fourth motor, the noise reduction assembly is installed at the top of the sliding frame and comprises an installation block, a U-shaped installation seat is installed at the top of the sliding frame, a rotating shaft of the installation block is rotatably installed in the U-shaped installation seat, a driven gear is installed at a power input end of the rotating shaft, and the fourth gear is meshed with the driven gear.
Further, the subassembly of making an uproar of falling still include fifth motor, installation pole, safety cover and inhale a sound section of thick bamboo, the fifth gear is installed to the power output shaft of fifth motor, drive gear is installed to the inner of installation pole, fifth gear and drive gear intermeshing, the outer end and the safety cover of installation pole are fixed with inhaling a sound section of thick bamboo.
Further, the noise reduction assembly further comprises a balancing weight, and the balancing weight is arranged at the top of the inner end of the mounting block.
Further, the sound-absorbing cylinder is filled with sound-absorbing materials, the sound-absorbing materials comprise a foamed polyolefin material layer, the foamed polyolefin material layer is of a cylindrical structure and is filled with microporous activated carbon and alumina, the pore diameter range of micropores in the microporous activated carbon is 0.2-0.8 nanometer, and the pore diameter range of mesopores in the alumina is 2-40 nanometers.
Compared with the prior art, the invention has the following beneficial effects:
1. when the device is used, the position of the noise reduction assembly can be moved downwards to a building window in the daytime, and the direction of the noise reduction assembly is adjusted to be opposite to and fixed with the noise reduction assembly according to the direction of noise; at night, the position of the noise reduction assembly can be moved up to a second floor window, and the direction of the noise reduction assembly is adjusted to be opposite to and fixed with the noise reduction assembly according to the direction of noise. Like this, can be according to the particularity of jumping the layer, random adjustment falls the position and the direction of subassembly of making an uproar to satisfy the special demand that the resident of jumping the layer falls the noise.
2. The ingenious design of bottom suspension strut structure not only is convenient for the installation and the dismantlement of bottom suspension strut, and the lateral sliding operation of the lateral shifting board of being convenient for moreover, and convenient and fast that use has improved user's comfort level.
3. The ingenious design of lateral shifting plate structure, the lateral sliding operation of the lateral shifting plate of being convenient for, convenient and fast that the use is got up has improved user's comfort level.
4. The ingenious design of the upper supporting plate structure is convenient for the installation and the disassembly of the upper supporting plate.
5. The design of the longitudinal rack and the second motor is convenient for the longitudinal moving plate to slide up and down, the use is convenient and fast, and the comfort level of a user is improved.
6. The ingenious design of sliding frame, third motor and direction rack is convenient for adjust the position of the subassembly of making an uproar that falls to improve the noise reduction effect greatly.
7. The ingenious design of fourth motor and driven gear is convenient for adjust the direction of making an uproar subassembly of falling at will according to the direction of noise to improve the noise reduction effect greatly.
8. The ingenious design of fifth motor and drive gear is convenient for adjust the direction of making an uproar subassembly of falling at will according to the direction of noise to improve the noise reduction effect greatly, in addition, the safety cover can protect the suction tube, increase of service life.
9. The design of balancing weight can prevent to fall the subassembly of making an uproar and turn up to the subassembly of making an uproar of falling plays the guard action, increase of service life.
10. The ingenious design of sound absorbing material has improved the sound noise reduction effect of inhaling greatly, can use a period of time back in addition, changes sound absorbing material, keeps good noise reduction effect lastingly, lets leap layer resident's life more comfortable.
Drawings
FIG. 1 is a first schematic view of a noise reduction structure for an exterior wall of a building according to an embodiment of the present invention;
FIG. 2 is a schematic view of an installation space structure of an embodiment of a noise reduction structure for an exterior wall of a building according to the present invention;
FIG. 3 is a schematic view of a second installation plane structure of an embodiment of a noise reduction structure for an exterior wall of a building according to the present invention;
FIG. 4 is a schematic perspective view of a noise reduction structure for an exterior wall of a building according to an embodiment of the present invention;
FIG. 5 is a schematic perspective view of a noise reduction structure for an exterior wall of a building according to an embodiment of the present invention;
FIG. 6 is a schematic perspective view of an embodiment of a noise reduction structure for an exterior wall of a building according to the present invention, in which a lower support plate and a lateral moving plate are installed (after the lateral moving plate is removed);
FIG. 7 is a first schematic perspective view (with the upright removed) illustrating the installation of the upright and the longitudinal moving plate in the noise reduction structure for the exterior wall of the building according to the embodiment of the present invention;
FIG. 8 is a schematic view of a second three-dimensional structure of an embodiment of a noise reduction structure for an exterior wall of a building, in which a vertical rod and a longitudinal moving plate are installed (after the vertical rod is removed);
FIG. 9 is a schematic view of a mounting plane structure of a noise reducing assembly in an embodiment of a noise reducing structure of an exterior wall of a building according to the present invention;
FIG. 10 is a schematic perspective view of a noise reducing assembly installed in an embodiment of a noise reducing structure for an exterior wall of a building according to the present invention;
FIG. 11 is an enlarged view of the structure at A in FIG. 10;
FIG. 12 is a schematic circuit diagram of a noise reduction effect measurement in an embodiment of a noise reduction structure for an exterior wall of a building according to the present invention;
FIG. 13 is a layout diagram of a speaker and two sound level meters for measuring noise reduction effect in an embodiment of the noise reduction structure for the exterior wall of a building according to the present invention.
Detailed Description
In order that those skilled in the art can better understand the present invention, the following technical solutions are further described with reference to the accompanying drawings and examples.
Examples
A noise reduction structure of a building outer wall comprises a lower supporting plate 3, a transverse moving plate 4, a vertical plate 5, an upper supporting plate 6, a vertical rod 7, a longitudinal moving plate 8 and a noise reduction assembly 9;
the lower support plate 3 and the upper support plate 6 can be fixedly arranged on the outer wall 1, the lower support plate 3 corresponds to the bottom of a first floor, and the upper support plate 6 corresponds to the top of a second floor;
the transverse moving plate 4 is arranged on the lower supporting plate 3 in a transverse sliding way;
two vertical plates 5 are arranged, the two vertical plates 5 are fixedly arranged at the left end and the right end of the transverse moving plate 4, the vertical rod 7 is fixedly arranged in the middle of the transverse moving plate 4, and the tops of the vertical plates 5 and the top of the vertical rod 7 are fixed with the upper supporting plate 6;
the longitudinal moving plate 8 can be sleeved outside the vertical plate 5 and the vertical rod 7 in a vertically sliding manner;
the noise reduction assembly 9 is mounted on the outer end of the upper surface of the longitudinal moving plate 8.
The lower support plate 3 is formed by integrally forming a lower horizontal plate and a lower vertical plate, the lower vertical plate is positioned below the lower horizontal plate, the lower vertical plate can be detachably connected with the outer wall 1, the outer end edge and the inner end edge of the lower horizontal plate are both turned upwards and vertically to form a guide strip 30, and a transverse rack 31 is arranged on the inner side of the upper surface of the lower horizontal plate.
At least two guide wheels 40 are arranged at the position, facing the guide strip 30, of the lower surface of the transverse moving plate 4, the guide wheels 40 are in sliding fit with the guide strip 30, a first motor 41 is arranged on the transverse moving plate 4, a first gear is arranged on a power output shaft of the first motor 41, and the first gear penetrates through the transverse moving plate 4 and is meshed with the transverse rack 31.
Go up backup pad 6 by last horizontal plate and last vertical plate integrated into one piece, go up the vertical plate and be located the top of last horizontal plate, go up the vertical plate and can dismantle with outer wall 1 and be connected.
The inside wall of pole setting 7 is fixed with vertical rack 70, and the upper surface inner fixed mounting of longitudinal moving plate 8 has the second motor, and the power output shaft of second motor installs the second gear, and the second gear is engaged with vertical rack 70 each other.
The middle part of the outer end of the longitudinal moving plate 8 is integrally formed with a mounting plate 80, a guide rack 800 is fixedly mounted on the lower surface of the mounting plate 80, a sliding frame is sleeved outside the mounting plate 80 in a sliding mode, a third motor 801 is mounted at the bottom of the sliding frame, a third gear is mounted on a power output shaft of the third motor 801, and the third gear is meshed with the guide rack 800.
Fourth motor 802 is installed at the top of sliding frame, and the fourth gear is installed to the power output shaft of fourth motor 802, and the subassembly 9 of making an uproar falls and installs at the top of sliding frame, and the subassembly 9 of making an uproar falls including the installation piece, and the U-shaped mount pad is installed at the top of sliding frame, and the pivot of installation piece is rotationally installed in the U-shaped mount pad, and driven gear 803 is installed to the power input end of pivot, fourth gear and driven gear 803 intermeshing.
The noise reduction assembly 9 further comprises a fifth motor 90, an installation rod 91, a protection cover 93 and a sound absorption cylinder 94, a fifth gear is installed on a power output shaft of the fifth motor 90, a transmission gear is installed at the inner end of the installation rod 91, the fifth gear is meshed with the transmission gear, and the outer end of the installation rod 91 is fixed with the protection cover 93 and the sound absorption cylinder 94.
The noise reduction assembly 9 further comprises a weight block 92, and the weight block 92 is arranged at the top of the inner end of the mounting block.
The sound absorption cylinder 94 is filled with sound absorption materials, the sound absorption materials comprise a foam polyolefin material layer, the foam polyolefin material layer is of a cylindrical structure and is filled with microporous activated carbon and alumina, the pore diameter range of micropores in the microporous activated carbon is 0.2-0.8 nanometer, and the pore diameter range of mesopores in the alumina is 2-40 nanometer.
The method comprises the steps of measuring by adopting a loudspeaker sound source, connecting a test system according to the graph 12 and debugging, receiving sound to be measured by a microphone, converting sound waves into electric signals by the microphone, filtering the passing signals by an amplifier and a filter, and analyzing by a CRAS vibration and dynamic signal acquisition and analysis system.
Connecting instruments, calibrating sound level meters, arranging a loudspeaker, ch1 sound level meters and ch2 sound level meters as shown in fig. 13, respectively placing 2 sound level meters on the inner side and the outer side of the outer wall of the building, selecting the sound level meters to be 0.7m from the horizontal distance to the test wall surface, and selecting the sound level meters to be 1.2m from the ground, wherein the ends of the two sound level meters are opposite to each other and are aligned on a straight line; the distance of the speaker from the test object was 7.5 m. And after the connection and placement of the instrument are completed, switching on a power supply, turning on a CRAS test and analysis system, adjusting the setting of related parameters, and starting measurement.
The measurement results are shown in table 1:
Figure BDA0003101116710000061
as can be seen from Table 1, in daytime, three time periods of 10: 30-11: 00, 13:00-13:30 and 16: 00-16: 30 are selected for measurement, and the average value of the sound level meter 2 is 75.8dB, the average value of the sound level meter 1 is 56.3dB, and the average value of the sound insulation amount is 19.5 dB.
At night, three time periods of 22: 30-23: 00, 01:00-01:30 and 04: 00-04: 30 are selected for measurement, the average value of the sound level meter 2 is 55.8dB, the average value of the sound level meter 1 is 46.2dB, and the average value of the sound insulation amount is 9.5 dB.
It can be seen that after the noise reduction structure is installed on the outer wall 1, the noise reduction effect is obviously improved, the special requirement of noise reduction of duplex residents can be met, and the noise reduction structure is suitable for market popularization and use.
In the drawings, reference numeral 2 denotes a floor, and reference numeral 100 denotes a window.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.

Claims (10)

1. A noise reduction structure of a building outer wall is characterized in that: comprises a lower supporting plate (3), a transverse moving plate (4), a vertical plate (5), an upper supporting plate (6), a vertical rod (7), a longitudinal moving plate (8) and a noise reduction component (9);
the lower supporting plate (3) and the upper supporting plate (6) can be fixedly arranged on the outer wall (1), the lower supporting plate (3) corresponds to the bottom of a first floor, and the upper supporting plate (6) corresponds to the top of a second floor;
the transverse moving plate (4) can be transversely and slidably arranged on the lower supporting plate (3);
the two vertical plates (5) are fixedly arranged at the left end and the right end of the transverse moving plate (4), the vertical rods (7) are fixedly arranged in the middle of the transverse moving plate (4), and the tops of the vertical plates (5) and the vertical rods (7) are fixed with the upper supporting plate (6);
the longitudinal moving plate (8) can be sleeved outside the vertical plate (5) and the vertical rod (7) in a vertically sliding manner;
the noise reduction assembly (9) is arranged at the outer end of the upper surface of the longitudinal moving plate (8).
2. A noise reducing structure for an external wall of a building according to claim 1, wherein: lower backup pad (3) by lower horizontal plate and lower vertical plate integrated into one piece, lower vertical plate be located lower horizontal plate's below, lower vertical plate can dismantle with outer wall (1) and be connected, lower horizontal plate's outer end edge and inner edge all turn over the formation conducting bar (30) of turning over perpendicularly upwards, lower horizontal plate's upper surface inboard is equipped with horizontal rack (31).
3. A noise reducing structure for an exterior wall of a building according to claim 2, wherein: the lower surface of the transverse moving plate (4) is provided with at least two guide wheels (40) opposite to the guide strips (30), the guide wheels (40) are in sliding fit with the guide strips (30), the transverse moving plate (4) is provided with a first motor (41), a power output shaft of the first motor (41) is provided with a first gear, and the first gear penetrates through the transverse moving plate (4) and is meshed with the transverse rack (31).
4. A noise reducing structure for an exterior wall of a building according to claim 3, wherein: go up backup pad (6) by last horizontal plate and last vertical plate integrated into one piece, last vertical plate be located the top of last horizontal plate, last vertical plate can dismantle with outer wall (1) and be connected.
5. A noise reducing structure for an exterior wall of a building according to claim 4, wherein: the utility model discloses a vertical pole setting (7) and vertical rack (70) are installed to the inside wall fixed mounting of pole setting (7), the upper surface inner fixed mounting of vertical moving plate (8) has the second motor, the power output shaft of second motor installs the second gear, second gear and vertical rack (70) intermeshing.
6. A noise reducing structure for an exterior wall of a building according to claim 5, wherein: outer end middle part integrated into one piece of vertical moving plate (8) has mounting panel (80), the lower fixed surface of mounting panel (80) installs direction rack (800), mounting panel (80) outer slip cover be equipped with the sliding frame, sliding frame bottom install third motor (801), the power output shaft of third motor (801) installs the third gear, third gear and direction rack (800) intermeshing.
7. A noise reducing structure for an external wall of a building as claimed in claim 6, wherein: fourth motor (802) is installed at the top of sliding frame, the power output shaft of fourth motor (802) installs the fourth gear, fall noise assembly (9) install at the top of sliding frame, fall noise assembly (9) including the installation piece, the U-shaped mount pad is installed at the top of sliding frame, the pivot of installation piece is rotationally installed in the U-shaped mount pad, driven gear (803) are installed to the power input end of pivot, fourth gear and driven gear (803) intermeshing.
8. A noise reducing structure for an external wall of a building as claimed in claim 7, wherein: noise reduction unit (9) still include fifth motor (90), installation pole (91), safety cover (93) and inhale a sound section of thick bamboo (94), the power output shaft of fifth motor (90) installs the fifth gear, drive gear is installed to the inner of installation pole (91), fifth gear and drive gear intermeshing, the outer end and the safety cover (93) of installation pole (91) and inhale a sound section of thick bamboo (94) and fix.
9. A noise reducing structure for an external wall of a building as claimed in claim 8, wherein: the noise reduction assembly (9) further comprises a balancing weight (92), and the balancing weight (92) is arranged at the top of the inner end of the mounting block.
10. A noise reducing structure for an exterior wall of a building according to claim 9, wherein: the sound absorption cylinder (94) is filled with sound absorption materials, the sound absorption materials comprise a foam polyolefin material layer, the foam polyolefin material layer is of a cylindrical structure and is filled with microporous activated carbon and alumina, the pore diameter range of micropores in the microporous activated carbon is 0.2-0.8 nanometer, and the pore diameter range of mesopores in the alumina is 2-40 nanometers.
CN202110625934.4A 2021-06-04 2021-06-04 Noise reduction structure of building outer wall Expired - Fee Related CN113323183B (en)

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