Building construction noise isolation device

Abstract

The utility model relates to the technical field of sound insulation and noise reduction, in particular to a building construction noise isolation device which comprises a shell, a sound absorption plate and sound absorption cotton, the sound absorption cotton and the sound absorption plate are spaced to form a cavity, a plurality of round holes are formed in the side, facing a noise source, of the sound absorption plate, a spiral hole is formed in the bottom wall of each round hole in a penetrating mode, and the spiral holes are communicated with the cavity. Medium-high frequency noise is absorbed through the sound absorption board, sound waves can be reflected in the hole channels for multiple times through the spiral holes, concentrated sound energy is dispersed, then a reflection interface is formed by the sound impedance difference between the cavity (transition area) and the sound absorption board, low-frequency sound wave transmission is blocked through air sound impedance sudden change, and finally the sound absorption cotton absorbs sound in a resonance mode at a specific frequency band. Wide-frequency-band noise reduction (low frequency depends on a cavity (a transition area) and medium-high frequency depends on a sound absorbing material) is achieved on the whole, and the sound energy gathering phenomenon is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of sound insulation and noise reduction, and particularly relates to a noise isolation device for building construction. Background Art

[0002] During the construction process, medium and low-frequency vibration noises generated by various mechanical equipment (such as pile drivers, concrete pump trucks, excavators, etc.), as well as medium and high-frequency noises generated by operations such as metal cutting and material transportation, have caused serious noise environmental pollution to the surrounding residential areas, commercial areas and office environments.

[0003] Building construction noise presents significant broadband characteristics (20Hz - 8kHz) and high-intensity impact characteristics. Currently, most of the existing noise isolation devices adopt a homogeneous combination of sound insulation boards and sound-absorbing cotton inside. When the noise is in the medium and high-frequency bands, due to the lack of a sound wave scattering mechanism in the existing homogeneous sound-absorbing structure, the phenomenon of sound energy aggregation is likely to occur, resulting in local noise exceeding the standard. Content of the Utility Model

[0004] In view of this, the purpose of the utility model is to provide a noise isolation device for building construction. The utility model can take into account broadband noise reduction and optimize the sound wave propagation path through an innovative triple sound insulation mechanism, so as to solve the technical problems described in the background art.

[0005] The utility model is realized through the following technical solutions:

[0006] A noise isolation device for building construction includes a housing. A sound-absorbing board is fixedly connected to the inner wall of the housing. A sound-absorbing cotton is fixedly arranged on the inner wall of the housing opposite to the sound-absorbing board. A cavity is formed by the interval between the sound-absorbing cotton and the sound-absorbing board.

[0007] A number of circular holes are opened on the side of the sound-absorbing board facing the noise source. A spiral hole is penetrated through the bottom wall of each circular hole, and the spiral hole communicates with the cavity.

[0008] Further, the upper and lower ends of the housing are respectively vertical parts. An inclined part is integrally formed between the two vertical parts. The included angle between the inclined part and the vertical part is between zero and thirty degrees.

[0009] Further, a number of protrusions and grooves are spaced apart on the surface of the upper vertical part. The protrusions and the grooves cooperate to form a wavy structure on the surface of the vertical part.

[0010] Further, the spiral hole is filled with rock wool, glass wool or polyester fiber.

[0011] Further, a moisture-proof film is arranged between the sound-absorbing cotton and the bottom wall of the housing.

[0012] Furthermore, the housing is made of galvanized steel plate, and the inner wall of the housing is coated with asphalt material.

[0013] Furthermore, a fixing seat is fixedly connected to the bottom of the housing, and a base is detachably installed below the fixing seat.

[0014] Furthermore, a connecting member is integrally formed on one side of the housing, and a connecting groove with a shape matching that of the connecting member is formed on the other side of the housing opposite to the connecting member.

[0015] The beneficial effects of the present utility model are as follows:

[0016] 1. In the noise isolation device of the present utility model, the triple sound insulation and noise reduction mechanisms inside work together. The sound absorption board absorbs medium and high frequency noise, and through the spiral holes, sound waves can be reflected multiple times in the pore channels to disperse the concentrated sound energy. Subsequently, the acoustic impedance difference between the cavity (transition area) and the sound absorption board forms a reflection interface, using the sudden change in air acoustic impedance to block the transmission of low frequency sound waves. Finally, the sound absorption cotton resonantly absorbs sound at specific frequency bands, achieving wide-band noise reduction as a whole (low frequency relies on the cavity (transition area), and medium and high frequency rely on sound absorption materials), and reducing the occurrence of sound energy aggregation.

[0017] 2. The noise isolation device of the present utility model has an outer shape of a segmented inclined sound insulation structure. The vertical section at the bottom of the housing can effectively attenuate the medium and high frequency sound waves reflected by the ground, reducing ground reverberation; the middle inclined section controls the reflection direction of sound waves through the angle, reflecting the noise upward to the high altitude to reduce the sound pressure level in sensitive areas; the vertical section at the top can block the secondary diffusion of the sound waves reflected by the inclined section, avoiding noise diffraction. Compared with the noise isolation devices with vertical or simple geometric shapes in the prior art, this structure can effectively balance the sound insulation effect and reduce the problem of secondary diffusion of sound energy caused by ground reflection reverberation.

[0018] In summary, through the internal and external collaborative acoustic design and the segmented inclined structure, the present utility model achieves a good balance between wide-band high-efficiency noise reduction and environmental adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of the construction noise isolation device of the present utility model.

[0020] Figure 2 It is a cross-sectional view of the housing of the construction noise isolation device of the present utility model.

[0021] Figure 3 It is a schematic structural diagram of the sound absorption board of the construction noise isolation device of the present utility model.

[0022] Figure 4 For the present utility model Figure 3An enlarged view of part A.

[0023] In the figure: 1 - housing, 11 - vertical part, 111 - protrusion, 112 - groove, 12 - inclined part, 2 - sound absorption board, 21 - round hole, 22 - spiral hole, 3 - sound absorption cotton, 4 - cavity, 5 - moisture-proof film, 6 - fixing seat, 7 - base, 8 - connecting piece, 9 - connecting groove. Specific embodiments

[0024] Typical embodiments embodying the features and advantages of the present invention will be specifically described in the following description. It should be understood that the present invention can have various variations in different embodiments, all of which do not depart from the scope of the present invention, and the descriptions and illustrations therein are essentially for illustrative purposes rather than for limiting the present invention.

[0025] In the description of this application, the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the structure referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to this application.

[0026] Please refer to Figure 1 , the present invention provides a technical solution: a building construction noise isolation device, including a housing 1, the housing 1 is made of galvanized steel plate, and a bituminous material is coated on the inner wall of the housing 1 to form a coating on the inner wall of the housing 1. The high viscoelasticity of bitumen can effectively inhibit the bending vibration (coincidence effect) generated by the housing 1 made of galvanized steel plate under the excitation of sound waves, and reduce the resonance noise in the medium and low frequencies (100 - 500 Hz);

[0027] Secondly, this coating can block the leakage of airborne sound (especially for high-frequency sound waves) and enhance the weather resistance (rust prevention), so that the housing 1 is suitable for long-term outdoor use. Butyl rubber composite material can be used to replace bitumen as needed, which is less affected by temperature but has a higher cost.

[0028] Please refer to Figure 1 , a fixing seat 6 is fixedly connected to the bottom of the housing 1, a base 7 is fixedly installed below the fixing seat 6 by bolts, a connecting piece 8 is integrally formed on one side of the housing 1, and a connecting groove 9 with a shape matching that of the connecting piece 8 is provided on the other side of the housing 1 opposite to the connecting piece 8. The connection of adjacent two noise isolation devices is facilitated by the insertion and cooperation of the connecting piece 8 and the connecting groove 9. The specific connection method is not the focus of this application document and is also relatively mature in the prior art, so no more details will be given here.

[0029] Please refer to Figure 1 andFigure 2 , the upper and lower ends of the housing 1 are respectively vertical parts 11, and an inclined part 12 is integrally formed between the two vertical parts 11. The included angle between the inclined part 12 and the vertical part 11 is between zero and thirty degrees, so that the noise isolation device of the present utility model forms a segmented inclined sound insulation structure. The vertical section at the bottom of the housing 1 (with a height greater than or equal to 1.5 m) can effectively attenuate the medium and high frequency sound waves (greater than 500 Hz) reflected by the ground;

[0030] When the height of the sound source is less than or equal to 1 m, the middle inclined section (with an inclination angle of 20°) can reflect the sound waves greater than or equal to 500 Hz to the 40° elevation angle direction. And compared with a pure straight plate, the 20° inclined surface can reduce the resonance risk in the 30 - 100 Hz frequency band by changing the structural stiffness distribution (the measured natural frequency is increased by 20%) and extending the vibration transmission path, but the optimal effect needs to be achieved by combining with asphalt materials;

[0031] The vertical section at the top (with a height greater than or equal to 0.5 m) suppresses the high - frequency diffraction leakage of the sound waves reflected by the inclined section through the sound shadow zone effect, especially significantly for the frequency band above 500 Hz.

[0032] Please refer to Figure 1 and Figure 2 , on the surface of the upper vertical part 11, a number of protrusions 111 and grooves 112 are spaced apart. The protrusions 111 cooperate with the grooves 112 to form a wavy structure on the surface of the vertical part 11. High - frequency noise sources at the construction site: cutting machines (2 - 5 kHz), electric drills (1 - 3 kHz), metal collision sounds, etc. The high - frequency sound waves are scattered in multiple directions through the wavy structure (concave - convex surface), reducing the directional reflection to sensitive areas (such as surrounding residential buildings);

[0033] Secondly, the wavy cross - section has a self - reinforcing rib effect, and the wind pressure resistance ability is about 20% higher than that of a flat plate, which is especially suitable for construction sites around high - rise buildings).

[0034] Please refer to Figures 2 to 4, a sound-absorbing board 2 is fixedly connected to the inner wall of the housing 1. The sound-absorbing board 2 is a rock wool board and is used for isolating noise. The sound-absorbing cotton 3 is fixedly arranged on the inner wall of the housing 1 opposite to the sound-absorbing board 2 by existing methods such as gluing or pressing strips. After the installation of the sound-absorbing board 2 and the sound-absorbing cotton 3, sealing treatment can be carried out by existing technologies such as rubber pressing strips or acoustic sealants. A cavity 4 is formed at an interval between the sound-absorbing cotton 3 and the sound-absorbing board 2. A plurality of round holes 21 are formed on the side of the sound-absorbing board 2 facing the noise source. The round holes 21 can increase the sound wave receiving area. A spiral hole 22 is formed through the bottom wall of each round hole 21. The spiral hole 22 communicates with the cavity 4. The spiral angle of the spiral hole 22 is 30-45° (optimized for 500-2000 Hz sound waves). Through the spiral structure of the spiral hole 22, sound waves can be reflected multiple times in the hole (the path is 40% longer than that of a straight hole), and the concentrated sound energy is dispersed. Subsequently, the sound impedance difference between the cavity 4 (transition area) and the sound-absorbing board 2 forms a reflection interface, consuming 25%-35% of the sound energy. Finally, the remaining sound waves are absorbed by the sound-absorbing cotton 3, so that multi-level cooperation can improve the overall noise reduction effect by 30%-50% compared with the traditional single-layer sound absorption structure.

[0035] The spiral hole 22 is filled with rock wool, glass wool or polyester fiber, which can further improve the overall performance of the sound insulation system of the noise isolation device. These materials all belong to porous sound-absorbing materials. When sound waves enter the tortuous microporous structure inside the materials, the air vibration and the friction between the hole walls convert the sound energy into heat energy and consume it.

[0036] Please refer to Figure 2 , a moisture-proof film 5 is arranged between the sound-absorbing cotton 3 and the bottom wall of the housing 1 to protect the performance of the sound-absorbing cotton 3 and achieve moisture-proof, mildew-proof, dust-proof and pollution-proof functions.

[0037] Finally, it should be noted that the above embodiments are only the preferred embodiments of the present invention and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention belong to the protection scope required by the present invention.

Claims

1. A building construction noise isolation device, characterized in that: It includes a housing (1). The upper and lower ends of the housing (1) are respectively vertical parts (11). An inclined part (12) is integrally formed between the two vertical parts (11). The included angle between the inclined part (12) and the vertical part (11) is between zero and thirty degrees. A sound-absorbing board (2) is fixedly connected to the inner wall of the housing (1). Sound-absorbing cotton (3) is fixedly provided on the inner wall of the housing (1) opposite to the sound-absorbing board (2). A cavity (4) is formed at an interval between the sound-absorbing cotton (3) and the sound-absorbing board (2). A number of round holes (21) are formed on the side of the sound-absorbing board (2) facing the noise source. A spiral hole (22) is formed through the bottom wall of each round hole (21). The spiral hole (22) communicates with the cavity (4).

2. The building construction noise isolation device according to claim 1, wherein: A number of protrusions (111) and grooves (112) are formed at intervals on the surface of the upper vertical part (11). The protrusions (111) cooperate with the grooves (112) to form a wavy structure on the surface of the vertical part (11).

3. The building construction noise isolation device according to claim 1, wherein: Rock wool, glass wool or polyester fiber is filled in the spiral hole (22).

4. The building construction noise isolation device according to claim 1, characterized in that: A moisture-proof film (5) is provided between the sound-absorbing cotton (3) and the bottom wall of the housing (1).

5. The construction noise isolation device according to claim 1, characterized in that: The housing (1) is made of galvanized steel plate, and an asphalt material is coated on the inner wall of the housing (1).

6. The building construction noise isolation device according to any one of claims 1 to 5, characterized in that: A fixing seat (6) is fixedly connected to the bottom of the housing (1). A base (7) is detachably installed below the fixing seat (6).

7. The noise isolation device for building construction according to any one of claims 1 to 5, characterized in that: A connecting piece (8) is integrally formed on one side part of the housing (1). A connecting groove (9) with a shape matching that of the connecting piece (8) is formed on the other side of the housing (1) opposite to the connecting piece (8).

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