CN219011662U - Low-frequency sound absorption device with built-in double-T-shaped structure - Google Patents

Low-frequency sound absorption device with built-in double-T-shaped structure Download PDF

Info

Publication number
CN219011662U
CN219011662U CN202223404104.8U CN202223404104U CN219011662U CN 219011662 U CN219011662 U CN 219011662U CN 202223404104 U CN202223404104 U CN 202223404104U CN 219011662 U CN219011662 U CN 219011662U
Authority
CN
China
Prior art keywords
plate
shaped partition
cover plate
shaped
sound absorbing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202223404104.8U
Other languages
Chinese (zh)
Inventor
陈江雪
胡文林
齐春雨
刘冀钊
周继超
赵世磊
何宾
宋哲男
张佳璐
王少林
姜博龙
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Railway Design Corp
Original Assignee
China Railway Design Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by China Railway Design Corp filed Critical China Railway Design Corp
Priority to CN202223404104.8U priority Critical patent/CN219011662U/en
Application granted granted Critical
Publication of CN219011662U publication Critical patent/CN219011662U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation

Landscapes

  • Building Environments (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)

Abstract

The utility model discloses a low-frequency sound absorption device with a built-in double-T-shaped structure, which comprises an outer frame, a T-shaped partition plate, a cover plate and a bottom plate, wherein the outer frame, the cover plate and the bottom plate form a closed cuboid, the cover plate faces one side of a sound source, and the cover plate and the bottom plate are square with the same size; the T-shaped partition board is provided with two blocks and is internally arranged in a cuboid formed by the outer frame, the cover plate and the bottom plate to form three acoustic cavities with adjustable sizes; the length of the T-shaped partition board is the same as that of the bottom board, the transverse straight edge of the T-shaped partition board is parallel to the cover board, and the vertical straight edge of the T-shaped partition board is connected with the bottom board and is vertical to the bottom board; the cover plate is provided with two identical rectangular openings, and the length of each rectangular opening is identical to that of the cover plate; and sound absorption materials are filled between the rectangular opening and the T-shaped partition plate, so that the noise reduction effect is enhanced. The low-frequency sound absorption device can effectively improve the sound absorption and noise reduction effects of the frequency domain below 200Hz, and has the characteristics of small structural size and installation space saving.

Description

Low-frequency sound absorption device with built-in double-T-shaped structure
Technical Field
The utility model relates to the field of noise reduction devices, in particular to a built-in double-T-shaped structure low-frequency sound absorption device.
Background
When a high-speed train or a subway train passes through an overhead station and enters and exits, the bridge deck vibrates to form structural noise and radiates downwards, so that noise of a waiting hall, an office and a rest room below a bridge is increased. The bridge structure noise is mainly low-frequency noise, is easy to cause human discomfort, affects the health of passengers and workers, and needs to take low-frequency noise reduction measures in a targeted manner.
The existing railway and subway station indoor suspended ceilings mainly adopt porous sound absorbing materials such as rock wool, glass silk floss, inorganic fiber spraying, mineral wool boards and the like, and the noise reduction effect on low-frequency noise below 200Hz is poor. In order to reduce low-frequency noise below 200Hz, the amount of the sound absorbing material is increased by several times, or a large-size space sound absorbing structure is manufactured, so that the sizes of the sound absorbing material and the components are equivalent to the wavelength of the low-frequency noise, and the low-frequency noise can be effectively absorbed. However, in practical railway and subway architectural designs, enough space is reserved on the indoor roof under the bridge for arranging ventilation, illumination, fire protection and other systems, and no enough space is available for installing large-size sound absorbing materials or space sound absorbers.
Disclosure of Invention
The utility model aims to provide the built-in double-T-shaped super-structure low-frequency sound absorption device which has good sound absorption and noise reduction effects on low-frequency noise, small structural size and space saving.
For this purpose, the utility model adopts the following technical scheme:
the utility model provides a built-in two T shape structure low frequency sound absorber, includes frame, first T shape baffle, second T shape baffle, apron, bottom plate and sound absorbing material, wherein:
the outer frame is formed by vertically surrounding 4 identical rectangular plates, a cuboid cavity is formed by surrounding the outer frame, the cover plate and the bottom plate, the cover plate faces one side of the sound source, and the cover plate and the bottom plate are square with identical sizes;
the first T-shaped partition plate and the second T-shaped partition plate are arranged in the cuboid-shaped cavity to divide the cavity into a first sound cavity, a second sound cavity and a third sound cavity;
the lengths of the first T-shaped partition plate and the second T-shaped partition plate are the same as those of the bottom plate, the first T-shaped partition plate transverse plate and the second T-shaped partition plate transverse plate are parallel to the cover plate, the first T-shaped partition plate vertical plate and the second T-shaped partition plate vertical plate are connected with the bottom plate and are perpendicular to the bottom plate, and the heights of the first T-shaped partition plate vertical plate and the second T-shaped partition plate vertical plate are equal to each other but lower than those of the outer frame;
two identical rectangular openings are formed on the cover plate, and the length of each rectangular opening is identical to that of the cover plate;
the sound absorbing materials are two, the sound absorbing materials are respectively arranged between each rectangular opening and the corresponding T-shaped partition board, the lower surface of the sound absorbing materials is fixedly connected with the upper surface of the transverse straight edge of the T-shaped partition board, and the upper surface of the sound absorbing materials is flush with the upper surface of the cover board.
Preferably, the outer frame, the cover plate, the bottom plate, the first T-shaped partition plate and the second T-shaped partition plate are hard metal or nonmetal plates, and the thickness is 1 mm-5 mm; the height of the outer frame is 100-200 mm; the side length of the cover plate and the bottom plate is 400-1000 mm; the width of the rectangular opening is 100-400 mm.
Preferably, the heights of the first T-shaped partition riser and the second T-shaped partition riser are 80-180 mm; the widths of the first T-shaped partition transverse plate and the second T-shaped partition transverse plate are 50-200 mm.
The length and width of the sound absorbing material are the same as those of the rectangular opening, and the flow resistance is 1000 Pa.s/m 2 ～10000Pa·s/m 2 。
The utility model has the following beneficial effects:
1. the utility model utilizes the acoustic superstructure to manufacture the low-frequency sound absorption device, and utilizes the internal artificial structure to have the sound absorption and noise reduction performance for low-frequency noise below 200Hz on the premise of relatively smaller overall size.
2. The built-in double-T-shaped super structure overcomes the dependence of the low-frequency sound absorption device on a large-size cavity, greatly reduces the size of the noise reduction device and saves the building space.
3. Compared with the existing sound absorption material or noise reduction device, the device has smaller overall thickness and better low-frequency sound absorption coefficient, the average sound absorption coefficient of 50-200 Hz is more than 0.4, the sound absorption peak value reaches more than 0.9, the frequency of the sound absorption peak value is controllable, and an efficient solution is provided for controlling radiation noise of indoor structures of buildings.
Drawings
FIG. 1 is an isometric view of a low frequency sound absorber of the present utility model having a built-in double T-shaped configuration;
FIG. 2 is a sectional view showing the internal construction of the low frequency sound absorbing device with a trapezoid built-in double T-shaped structure;
FIG. 3 is a schematic diagram of a cover plate structure of a low frequency sound absorber with a built-in double T-shaped structure;
fig. 4 is a graph showing sound absorption coefficients when the sound absorption device of example 1 employs sound absorption materials with different flow resistance.
In the figure:
1. an outer frame; 2. a first T-shaped separator; 2a, a first T-shaped partition diaphragm; 2b, a first T-shaped partition riser;
3. a second T-shaped separator; 3a, a second T-shaped partition diaphragm; 3b, a second T-shaped partition riser; 4. a cover plate;
5. a bottom plate; 6. a sound absorbing material; 7. a first acoustic cavity; 8. a second sound cavity; 9. a third acoustic cavity;
10. a rectangular opening.
Detailed Description
The low frequency sound absorbing device with built-in double T-shaped structure of the present utility model will be described in detail with reference to the accompanying drawings and examples.
It should be noted that, in the present utility model, the "vertical partition edge" and the "horizontal partition edge" are all based on the positional relationship shown in the drawings, and are merely for convenience of describing the present utility model and simplifying the description, and are not meant to represent that they must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
Example 1
Fig. 1-3 show a low frequency sound absorber with a built-in double-T-shaped structure according to the present utility model. As shown in the drawing, the sound absorbing device includes an outer frame 1, a first T-shaped partition plate 2, a second T-shaped partition plate 3, a cover plate 4, a bottom plate 5, and a sound absorbing material 6.
The outer frame 1, the cover plate 4 and the bottom plate 5 enclose a cuboid cavity, the cover plate 4 faces one side of the sound source, and the cover plate 4 and the bottom plate 5 are square with the same size. The first T-shaped partition plate 2 and the second T-shaped partition plate 3 are arranged in the cuboid-shaped cavity, and divide the cavity into a first sound cavity 7, a second sound cavity 8 and a third sound cavity 9.
The length of the first T-shaped partition plate 2 and the second T-shaped partition plate 3 is the same as the length of the bottom plate 5. The first and second T- shaped separator plates 2a, 3a are parallel to the cover plate 4. The first T-shaped partition riser 2b and the second T-shaped partition riser 3b are connected to the bottom plate 5 and perpendicular to the bottom plate 5.
As shown in fig. 3, the cover plate 4 has two identical rectangular openings 10, and the length of the rectangular openings 10 is the same as the length of the cover plate 4.
As shown in fig. 2, two sound absorbing materials 6 are respectively installed between each rectangular opening 10 and the corresponding T-shaped partition board, the lower surface of the sound absorbing material 6 is fixedly connected with the upper surface of the transverse edge of the T-shaped partition board, and the upper surface of the sound absorbing material 6 is flush with the upper surface of the cover board 4. The sound absorption material is a lightweight porous material, can be made of one material, and can also be formed by laminating and splicing a plurality of materials.
Example 1
In this embodiment, the outer frame 1, the cover plate 4, the bottom plate 5, the first T-shaped partition plate 2, and the second T-shaped partition plate 3 are all made of aluminum plates having a thickness of 1.5 mm. The outer frame 1 is 140mm in height, and the side lengths of the cover plate 4 and the bottom plate 5 are 600mm. The rectangular opening 10 is 100mm wide. The first T-shaped diaphragm vertical plate 2b and the second T-shaped diaphragm vertical plate 3b are 124mm in height, the first T-shaped diaphragm horizontal plate 2a is 205mm in width, and the second T-shaped diaphragm horizontal plate 3a is 140mm in width. The widths of the first acoustic cavity 7, the second acoustic cavity 8 and the third acoustic cavity 9 are 196mm. The volume of the sound absorbing material 6 is 600mm×100mm×10mm. In this embodiment, rock wool is used as the sound absorbing material.
The flow resistance of the sound absorbing material is 1000 Pa.s/m respectively 2 、5000Pa·s/m 2 、10000Pa·s/m 2 The spectral curve of the sound absorption coefficient of this example is shown in fig. 4. As shown in the figure, in the frequency range of 50 Hz-200 Hz, the peak values of the sound absorption coefficients are 0.99, 0.84 and 0.72 respectively, and the average values are 0.44, 0.45 and 0.44 respectively, which indicates that the built-in double-T-shaped structure low-frequency sound absorption device can effectively absorb low-frequency noise within 200 Hz.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims (4)

1. The utility model provides a built-in two T shape structure low frequency sound absorber, its characterized in that includes frame (1), first T shape baffle (2), second T shape baffle (3), apron (4), bottom plate (5) and sound absorbing material (6), wherein:
the outer frame (1) is formed by vertically surrounding 4 identical rectangular plates, the outer frame (1), the cover plate (4) and the bottom plate (5) form a cuboid cavity, the cover plate (4) faces one side of a sound source, and the cover plate (4) and the bottom plate (5) are square with identical sizes;
the first T-shaped partition plate (2) and the second T-shaped partition plate (3) are arranged in the cuboid-shaped cavity to divide the cavity into a first sound cavity (7), a second sound cavity (8) and a third sound cavity (9);
the lengths of the first T-shaped partition plate (2) and the second T-shaped partition plate (3) are the same as those of the bottom plate (5), the first T-shaped partition plate transverse plate (2 a) and the second T-shaped partition plate transverse plate (3 a) are parallel to the cover plate (4), the first T-shaped partition plate vertical plate (2 b) and the second T-shaped partition plate vertical plate (3 b) are connected with the bottom plate (5) and are perpendicular to the bottom plate (5), and the heights of the first T-shaped partition plate vertical plate (2 b) and the second T-shaped partition plate vertical plate (3 b) are equal to each other but lower than those of the outer frame (1);
two identical rectangular openings (10) are formed in the cover plate (4), and the length of each rectangular opening (10) is identical to that of the cover plate (4);
the two sound absorbing materials (6) are respectively arranged between each rectangular opening (10) and the corresponding T-shaped partition board, the lower surface of the sound absorbing materials (6) is fixedly connected with the upper surface of the transverse straight edge of the T-shaped partition board, and the upper surface of the sound absorbing materials (6) is flush with the upper surface of the cover board (4).
2. The low frequency sound absorbing device of built-in double T-shaped structure according to claim 1, wherein: the outer frame (1), the cover plate (4), the bottom plate (5), the first T-shaped partition plate (2) and the second T-shaped partition plate (3) are hard metal or nonmetal plates, and the thickness is 1 mm-5 mm; the height of the outer frame (1) is 100 mm-200 mm; the side length of the cover plate (4) and the bottom plate (5) is 400-1000 mm; the width of the rectangular opening (10) is 100-400 mm.
3. The low frequency sound absorbing device of built-in double T-shaped structure according to claim 2, wherein: the heights of the first T-shaped partition vertical plate (2 b) and the second T-shaped partition vertical plate (3 b) are 80-180 mm; the widths of the first T-shaped partition transverse plate (2 a) and the second T-shaped partition transverse plate (3 a) are 50-200 mm.
4. The low frequency sound absorbing device of built-in double T-shaped structure according to claim 1, wherein: the length and width of the sound absorbing material are the same as those of the rectangular opening (10), and the flow resistance is 1000Pa·s/m 2 ～10000Pa·s/m 2 。
CN202223404104.8U 2022-12-19 2022-12-19 Low-frequency sound absorption device with built-in double-T-shaped structure Active CN219011662U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202223404104.8U CN219011662U (en) 2022-12-19 2022-12-19 Low-frequency sound absorption device with built-in double-T-shaped structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202223404104.8U CN219011662U (en) 2022-12-19 2022-12-19 Low-frequency sound absorption device with built-in double-T-shaped structure

Publications (1)

Publication Number Publication Date
CN219011662U true CN219011662U (en) 2023-05-12

Family

ID=86232866

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202223404104.8U Active CN219011662U (en) 2022-12-19 2022-12-19 Low-frequency sound absorption device with built-in double-T-shaped structure

Country Status (1)

Country Link
CN (1) CN219011662U (en)

Similar Documents

Publication Publication Date Title
CN105803965B (en) A kind of broadband sound absorption cell board
CN203228783U (en) Noise reduction air channel and railway carriage
CN204356925U (en) A kind of indoor substation low frequency absorption denoising device
CN202905429U (en) Multifunctional outer cover for silencing dry-type transformer
CN209855004U (en) Heat insulation aluminum veneer
CN202117734U (en) Impedance compound muffler with large wind volume
CN205529956U (en) Broadband sound absorption cell board
CN219011662U (en) Low-frequency sound absorption device with built-in double-T-shaped structure
CN208848612U (en) A kind of industrial equipment denoising device
CN212077682U (en) Buckling type circular arc-shaped sound barrier unit plate
CN210713368U (en) Sound-absorbing partition wall
CN209817186U (en) Sound insulation and absorption partition wall
CN217810252U (en) Wheel rail noise sound absorption system and rail system
CN112502352B (en) Buckle plate, composite function plate and noise reduction, sound absorption and insulation and magnetic conduction elimination method
CN205369569U (en) Can assembled large -scale room ventilation sound -proof housing of repeated dismantlement
CN202745228U (en) Metal sound insulation low-frequency acoustic board
CN208518108U (en) A kind of wall sound insulation mounting structure
CN210805210U (en) Porous sound absorption plate and sound absorption device
CN208763224U (en) A kind of telescopic sound absorption module
CN2716328Y (en) Vibration preventing, sound absorbing and noise reducing assembling type unit member
CN215976921U (en) Louvered muffler device
CN111549922A (en) Internally-inserted folded angle sound guide corridor type superstructure and low-frequency sound absorption device manufactured by same
CN217871227U (en) Building construction curtain that gives sound insulation
CN213062606U (en) Assembled sound-absorbing ceiling
CN213979280U (en) Sound insulation structure of light house

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant