CN106816145A - A kind of steel compound noise reduction board and denoising device - Google Patents

Abstract

The invention provides a composite noise reduction board and a noise reduction device. The composite noise reduction board includes a sound-absorbing layer and a metal sound-insulating layer, the sound-absorbing layer has sound-absorbing pores, the cross-section of the metal sound-insulating layer is a C-shaped structure, and the sound-absorbing layer is composited on the metal sound-insulating layer layer within the cavity of the C-shaped structure. The noise source is insulated by a metal sound insulation layer with a C-shaped structure, and a sound-absorbing layer with sound-absorbing pores is set in the cavity of the C-shaped structure of the metal sound-insulation layer to absorb noise, and the noise source is realized. Efficient sound absorption and noise reduction treatment is carried out. The noise reduction board has a simplified structure, is economical and environmentally friendly, is easy to assemble, and has a wide range of applications.

Description

A composite noise reduction board and noise reduction device

technical field

The invention relates to the technical field of noise control, in particular to a composite noise reduction board and a noise reduction device.

Background technique

At present, noise pollution has been regarded as one of the main environmental pollutions, which is in urgent need of treatment. In particular, traffic noise, industrial noise and construction noise mainly exist in densely populated cities. Noise pollution brings a lot of inconvenience to people's work and life, and even seriously affects their health. The country has also issued many related policies on governance. A series of noise standards and regulations have been formulated.

In the prior art, a muffler or a sound insulation cover is usually used for noise reduction treatment, but the muffler has extremely high requirements on the installation environment, and the cost is high. The sound insulation cover usually seals the noise source equipment in a small space, making it Separated from the surrounding environment to reduce the impact of noise on the environment, and the existing sound insulation enclosures usually use perforated panels or multi-layer composite sound-absorbing panels, the usual practice is to composite sound-absorbing materials and sound-insulating materials Together, this kind of multi-layer composite sound-absorbing panel has many consumables, complex structure, and high cost. In practical engineering applications, it is also limited by space. It is not suitable for moving noise sources, and installation and construction are inconvenient. The sound effect is also not good.

Contents of the invention

Embodiments of the present invention provide a noise reduction board and a noise reduction device, which can effectively absorb and reduce noise, have less consumables, a simplified structure, and a wide range of applications.

In the first aspect, a noise reduction board is provided, including a sound-absorbing layer and a metal sound-insulating layer, the sound-absorbing layer has sound-absorbing pores, the cross-section of the metal sound-insulating layer is a C-shaped structure, and the sound-absorbing layer Composite in the cavity of the C-shaped structure of the metal sound insulation layer.

In a first possible implementation manner, the sound-absorbing layer includes sound-absorbing particles, adhesives and reinforcement, the adhesive is wrapped on the outer surface of the sound-absorbing particles, and the sound-absorbing particles are Pores are formed by bonding with the adhesive, and the reinforcement is arranged between the sound-absorbing particles.

In combination with the above possible implementation manners, in a second possible implementation manner, the sound-absorbing particles are river sand particles, ceramic particles, or particles of renewable materials with a particle size between 10 mesh and 50 mesh.

With reference to the above possible implementation manners, in a third possible implementation manner, the metal sound insulation layer is a metal plate with a thickness ranging from 0.8mm to 2.0mm.

With reference to the foregoing possible implementation manners, in a fourth possible implementation manner, the metal plate is a steel plate, aluminum plate, or iron plate with a thickness of 1.5 mm.

With reference to the above possible implementation manners, in a fifth possible implementation manner, the reinforcement is a strip metal, and the reinforcement is connected to the metal sound insulation layer of the C-shaped structure.

With reference to the above possible implementation manners, in a sixth possible implementation manner, the total thickness of the composite noise reduction plate is between 20mm and 40mm.

In a second aspect, a noise reduction device is provided, comprising the composite noise reduction panels described in any one of the above first aspects, and the composite noise reduction panels are connected to form a box-shaped structure surrounded by six sides.

In a first possible implementation manner, the composite noise reduction panels are detachably connected.

With reference to the above possible implementation manners, in a second possible implementation manner, a positioning member is provided at the joint of the composite noise reduction board.

With reference to the above possible implementation manners, in a third possible implementation manner, a sealing strip is provided between the contact surfaces connected to each other of the composite noise reduction plates.

With reference to the above possible implementation manners, in a fourth possible implementation manner, the composite noise reduction panels are snap-fitted.

In combination with the above possible implementation manners, in a fifth possible implementation manner, the composite noise reduction plate is a connection structure of a pin shaft and a pin hole at the clamping point, or a connection structure of a protrusion and a groove.

In combination with the above possible implementation manners, in a sixth possible implementation manner, the composite noise reduction plate has a clamping gap at the clamping joint, and the clamping gaps are clamped to form a stepped clamping surface.

With reference to the above possible implementation manners, in a seventh possible implementation manner, a movable adjustable connection member is further included, and the adjustable connection member is arranged at the stepped joint of the composite noise reduction board.

In combination with the above possible implementation manners, in the eighth possible implementation manner, the adjustable connector is a tightened cabinet lock, and the composite noise reduction board is provided with an angled connector at the stepped joint, The two sides of the angle connector are respectively connected to two composite noise reduction panels connected to each other, and the tightening cabinet lock is connected to the angle connector, thereby connecting the composite noise reduction panels.

To sum up, the noise reduction board and the noise reduction device provided by the embodiments of the present invention insulate the noise source through a metal sound insulation layer with a C-shaped structure, and are installed in the cavity of the C-shaped structure of the metal sound insulation layer The sound-absorbing layer with the sound-absorbing pores can absorb noise, thereby realizing effective sound-absorbing and noise-reducing treatment of noise sources.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the accompanying drawings required in the embodiments of the present invention. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For Those of ordinary skill in the art can also obtain other drawings based on these drawings without making creative efforts.

Fig. 1 is a schematic cross-sectional structure diagram of an embodiment of a noise reduction panel of the present invention;

Fig. 2 is a schematic cross-sectional structure diagram of an embodiment of the noise reduction device of the present invention;

Fig. 3 is a schematic diagram of an embodiment of the assembly method of the noise reduction board of the present invention.

In the figure, 1: sound-absorbing particles; 2: adhesive; 3: reinforcement; 4: metal sound insulation layer; 5: noise source equipment; 6: composite noise reduction board; 7: sealing strip; 8: cabinet lock; 9: pin; 10: angle connector; 11: base; 12: fixed pin; 13: pin hole.

detailed description

Embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings and examples. The detailed description and accompanying drawings of the following embodiments are used to illustrate the principles of the present invention, but are not used to limit the scope of the present invention, that is, the present invention is not limited to the described preferred embodiments, and the scope of the present invention is defined by the claims .

Sound originates from the vibration of an object, which causes the vibration of the adjacent air to form sound waves, and propagates around in the air medium. When the sound is transmitted to the surface of the component material, part of the sound energy is reflected, part of the sound energy penetrates the material, and part of the sound energy is converted into heat energy due to the vibration of the component material or the friction with the surrounding medium when the sound propagates in it, and the sound energy is lost. , that is, it is usually said that the sound is absorbed by the material; the sound energy is reflected by the surface of the component material, so that the sound energy is blocked in the propagation path and cannot pass directly, that is, the sound is usually blocked by the material.

Fig. 1 is a schematic structural diagram of an embodiment of a composite noise reduction board, which has dual noise reduction effects of sound absorption and sound insulation, and can perform efficient noise reduction processing on noise sources. As shown in Figure 1, the composite noise reduction board 6 includes a sound-absorbing layer and a metal sound-insulating layer 4, the sound-absorbing layer has sound-absorbing pores, the cross-section of the metal sound-insulating layer 4 is a C-shaped structure, and the sound-absorbing layer is arranged on the metal insulating layer. In the cavity of the C-shaped structure of the sound layer 4, since the sound-absorbing layer has sound-absorbing pores, when the sound wave is incident on the sound-absorbing layer with the sound-absorbing pores, the sound energy is attenuated and plays a sound-absorbing role; the sound-absorbing layer absorbs sound The attenuated sound energy propagates to the metal sound insulation layer 4. Since the metal sound insulation layer 4 has a higher density and heavier mass than the general sound insulation layer, it further attenuates the sound energy and blocks the sound to play the role of sound insulation; the C-shaped structure The sound-insulating layer has a space for accommodating the sound-absorbing layer, and the sound-absorbing layer and the metal sound-insulating layer 4 are combined to form a noise-reducing board with an integrated structure.

The composite noise reduction board 6 of this embodiment has double noise reduction effects of sound absorption and sound insulation. Through the C-shaped structure of the metal sound insulation layer 4, it can form a special structure of accommodating space surrounded by surrounding metal, which can better absorb sound. Layer and sound insulation layer are combined and fixed to form a stable integrated noise reduction board. The structure is simple and easy to assemble and disassemble. It can be widely used in various noise sources that require noise reduction, especially for mobile noise source equipment and applications with limited space. , and can effectively reduce noise for low-frequency noise sources.

As an optional embodiment, the sound-absorbing layer includes sound-absorbing particles 1, adhesive 2 and reinforcement 3, the adhesive 2 wraps the outer surface of the sound-absorbing particles 1, and the sound-absorbing particles 1 pass through the adhesive 2 bonded to form pores, and the reinforcement 3 is arranged between the sound-absorbing particles 1. The sound-absorbing particles 1 are bonded by the adhesive 2 to form internal interconnected openings, which can effectively reduce the sound pressure level of the noise. Generally, for better sound-absorbing effects, fine and uniform sound-absorbing particles 1 can be selected. In order to form as small and evenly distributed micropores as possible through the bonding of the adhesive 2, it should be noted that the adhesive 2 should fully cover the outer surface of the sound-absorbing particles 1 to ensure the bonding effect and form a stable absorption sound layer. Further, a reinforcement 3 with a supporting and stabilizing effect is arranged in the middle of the granular sound-absorbing layer, and the sound-absorbing particles 1 are adhered to the reinforcement 3 to make the bonded sound-absorbing layer more stable.

As an optional embodiment, the sound-absorbing particles 1 are river sand grains, ceramic grains, or particles of renewable materials with a particle size between 10 mesh and 50 mesh. It has better sound absorption effect, and at the same time, the material selection of river sand is convenient and economical. Ceramic particles or other renewable material particles can also be selected according to needs, all of which are within the scope of protection of the scheme of the present invention.

As a preferred embodiment, the sound-absorbing particles 1 use river sand with a particle size between 10 mesh and 50 mesh, which has the advantages of sound absorption, fire prevention, moisture resistance and environmental protection. This kind of river sand can be bonded by the adhesive 2 to form tiny sound-absorbing pores that interpenetrate and distribute evenly, so that the incident sound energy can propagate between these sound-absorbing pores, gradually weaken the sound energy, and achieve a better sound-absorbing effect. The raw material is heavy. According to the principle of sound insulation weight ratio, it has the function of absorption and sound insulation at the same time. Specifically, when the sound wave is incident on the surface of the sand grain, part of it is reflected on the surface of the sand grain, and the other part penetrates into the interior of the sand grain and continues to propagate. The vibration of the sound wave drives the vibration of the adjacent sand grains, and the adjacent sand grains transmit the vibration to the sand grains adjacent to it, so that the sound wave propagates down in the sound-absorbing layer of the porous sand grains, and in the process of propagation, the air movement in the pores is caused. , the hole wall is subject to the motion friction and viscous resistance of air molecules, so that the sound energy is converted into heat energy and dissipated. After the sound wave is reflected on the rigid sand wall surface, when the sound wave returns to the surface through the sand particle, part of the sound wave is transmitted into the air, and part of it is reflected again. Back inside the sand-grain sound-absorbing layer, the sound wave passes through this repeated propagation, so that the energy is continuously converted and dissipated until the balance is reached, and the sand-grain sound-absorbing layer also absorbs part of the sound energy. Therefore, the sand grain sound-absorbing layer is superior to sound-absorbing materials such as centrifugal glass wool, rock wool, mineral wool, polyester fiber cotton, and perforated plates in the prior art.

It should be noted that the adhesive 2 needs to have good bonding performance. Adhesives such as environmentally friendly polyurethane, epoxy resin, and inorganic modified sodium silicate adhesive can be used, as long as the adhesive can bond the sand grains. , and can stick the sand to the metal.

As an optional embodiment, the metal sound insulation layer 4 is a metal plate with a thickness between 0.8mm and 2.0mm. According to tests, the metal sound insulation layer 4 within this thickness range has a better sound insulation effect. Preferably, the metal sound insulation layer 4 is a steel plate, aluminum plate or iron plate with a thickness of 1.5mm, which has the characteristics of compactness and heavy weight, and can effectively play a sound insulation effect, and these plates are relatively common, and the materials are convenient and more economical. It is installed and matched with the noise source equipment to form a harmonious appearance. Therefore, the metal sound insulation layer in this embodiment is a stainless steel plate with a thickness of 1.5mm.

In a further optional embodiment, the reinforcing bar 3 is strip-shaped metal. Generally, it is better to use round steel as the support, and the reinforcing bar 3 is connected to the metal sound insulation layer 4 of the C-shaped structure. Specifically, the diameter is Φ5-Φ10. In practical applications, round steel with appropriate specifications is selected as the reinforcement 3, which is evenly distributed in the sound-absorbing particles 1 in the form of river sand and connected to the metal sound insulation layer 4 to better support and stabilize. Or according to needs, suitable strip-shaped metal reinforcement 3 is penetrated in the middle of the sound-absorbing layer of river sand, as long as it can play a role in supporting and stabilizing the granular sound-absorbing layer, it is within the protection scope of the technical solution of the present invention.

Further, the total thickness of the composite noise reduction board 6 in this embodiment is between 20mm and 40mm. Generally, the composite noise reduction board 6 has a bulk density of 30-70kg/m ² . After testing, the composite noise reduction board within this thickness range 6. It has a good noise reduction effect on general generators or similar noise source equipment.

As shown in FIG. 2 , an embodiment of a noise reduction device using the above composite noise reduction board 6 is suitable for noise reduction treatment of noise source equipment 5 such as vehicle generators. The noise reduction device adopts the composite noise reduction board 6 of any of the above possible embodiments, and the composite noise reduction boards 6 are spliced to form a box-shaped structure surrounded by six sides, and the noise source equipment 5 is arranged on the noise reduction board through the base 11. inside the enclosed cavity of the device. By using the composite noise reduction board 6 to splice a box-shaped noise reduction device surrounded by six sides on the periphery of the noise source device 5 similar to the vehicle generator, the composite noise reduction board 6 of the above scheme can be flexibly assembled into a box-shaped noise reduction device The device is covered outside the noise source equipment 5 similar to the vehicle generator, which can effectively absorb and reduce noise, is convenient to assemble and disassemble, is applicable to mobile noise sources and noise source environments with limited space, and can control low frequency Effective noise reduction processing. Tests have proved that the noise reduction device of this embodiment can reduce the noise of the vehicle-mounted generator to 61-63 decibels by 72 decibels, and the noise reduction is about 10-8 decibels, especially for low-frequency noise (63Hz, 125Hz, 250Hz, 500Hz), the noise reduction effect is better.

In this embodiment, the composite noise reduction boards 6 are detachably connected. The detachable connection is flexible and convenient, and has a wide range of applications. Specifically, it can be flexibly assembled and disassembled according to the noise source device 5, and has good operability.

As an optional embodiment, a positioning member is provided at the joint of the composite noise reduction board 6, which is conducive to the positioning of the composite noise reduction board 6 during the assembly process and improves the assembly efficiency. Shafts, bolts, positioning blocks, etc. are positioned and installed, and the side panels and the floor of the noise reduction device in this embodiment are connected through fixed bolts 12 and corresponding bolt holes 13 . The specific installation between other parts can flexibly select corresponding positioning components according to requirements, as long as positioning components are provided at the joints of the composite noise reduction plate 6 assembly, it is within the scope of the technical solution of the present invention.

Furthermore, sealing strips 7 are filled between the connected contact surfaces of the composite noise-reducing panels 6, and generally elastic sealing strips are used, which can not only achieve sealing and noise reduction effects but also play a position-adjusting and buffering role. In this example, silica gel is used seal.

As an optional embodiment, the composite noise reduction plates 6 are snap-fitted, which can not only realize the function of connection but also realize the positioning effect to a certain extent. Specifically, the clip joint of the composite noise reduction plate 6 is a connection structure of a pin shaft and a pin hole, or a connection structure of a protrusion and a groove. Hole 13, when installing, only need to insert fixed bolt 12 in the bolt hole 13 to cooperate, more concretely realized the dual action effect of connection and positioning.

As shown in Figure 2 and Figure 3, the composite noise reduction board 6 has a clamping gap at the clamping point, and the clamping gaps are clamped to form a stepped clamping surface, and the composite noise reduction plates 6 connected to each other are clamped. The dislocation of the gaps is clamped together, and the dislocation clamping method makes the connection of the composite noise reduction board 6 more stable. At the same time, the dislocation formed has a certain barrier to noise, which further strengthens the noise reduction effect, and the clamping connection is sealed. Bar 7 strengthens the sound insulation effect.

As shown in Figure 2, it also includes a movable adjustable connecting member. The adjustable connecting member is arranged at the stepped joint of the composite noise reduction plate 6. Specifically, in this embodiment, the adjustable connecting member is arranged at the upper plate and the side plate. At the joint, the assembled noise reduction device can be connected more tightly and stably by adjusting the adjustable connector during the installation process, and the sealing strip 7 is pressed during the adjustment process to enhance the compact effect and further strengthen the sound insulation and noise reduction effect.

Preferably, the adjustable connector is an adjustable tightening cabinet lock 8 or a pin shaft. In this embodiment, the tightening cabinet lock 8 is taken as an example. The composite noise reduction board 6 is provided with an angular connection at the stepped joint 10, the two sides of the angle connector 10 are respectively connected to two composite noise reduction panels 6 connected to each other. Specifically, angle steel or angle aluminum can be used as the angle connector 10. Taking the angle steel as an example, there are also installed on the two sides of the angle steel The pin 9 and the cabinet lock 8 are connected and used together with the pin 9, and have the function of connection and locking, thereby realizing the connection of the composite noise reduction plate 6. Specifically, the adjustment and composite can be realized by adjusting the tightened cabinet lock 8. The tightness of the connection of the noise reduction board, meanwhile, the noise reduction device can also be opened or closed through the cabinet lock 8, which is convenient for the maintenance of the noise source device inside it, wherein the tightening type cabinet lock 12 of the present embodiment is similar to that of an electrical appliance The cabinet lock or the cabinet lock is improved to be suitable for the noise reduction device of this embodiment.

It should be noted that this embodiment is aimed at a noise reduction device suitable for vehicle-mounted generators or similar noise sources. First, the installation size is determined, and composite noise reduction panels 6 of appropriate specifications and sizes are selected for assembly. The composite noise reduction panels 6 connected There are fixed pins 12 and pin holes 13 on the top, and then the corresponding composite noise reduction boards 6 are initially positioned and spliced, and sealing strips are installed on the spliced parts for sealing, so that the noise source equipment is in the sealed environment of the noise reduction device, and finally through The adjusting parts are adjusted and locked. Specifically, composite noise reduction panels of corresponding specifications can be selected for assembly according to the noise source equipment that actually needs noise reduction. It is not limited to the assembly sequence and installation method of this embodiment.

To sum up, the composite noise reduction panel of the present invention has both sound absorption and sound insulation effects. It has a simplified structure, less consumables, is economical and environmentally friendly, flexible to use, easy to assemble and disassemble, has a wide range of applications, and can effectively target motion noise sources Noise reduction treatment for equipment and noise source equipment limited by space, and has a good sound absorption and noise reduction effect on low-frequency noise sources. The noise reduction device using the composite noise reduction board has good operability and can effectively absorb noise sources. Noise reduction processing.

While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for parts thereof without departing from the scope of the invention. In particular, as long as there is no structural conflict, the technical features mentioned in the various embodiments can be combined in any manner. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims (16)

1. a kind of steel compound noise reduction board, it is characterised in that including absorbent treatment and metal sound insulation layer, the absorbent treatment has sound-absorbing hole Gap, the section of the metal sound insulation layer is c-type structure, and the absorbent treatment is compounded in the c-type structure of the metal sound insulation layer Chamber in.

2. steel compound noise reduction board according to claim 1, it is characterised in that the absorbent treatment includes sound absorption particle, adhesive And arrangement of reinforcement, described adhesive is wrapped in the outer surface of the sound absorption particle, viscous by described adhesive between the sound absorption particle Connect to form hole, the arrangement of reinforcement is located between the sound absorption particle.

3. steel compound noise reduction board according to claim 2, it is characterised in that the sound absorption particle is granularity in 10 mesh to 50 mesh Between river sand grains, ceramic grain or recyclable materials.

4. steel compound noise reduction board according to claim 1, it is characterised in that the metal sound insulation layer for thickness in 0.8mm extremely Metallic plate between 2.0mm.

5. steel compound noise reduction board according to claim 4, it is characterised in that the metallic plate be the steel plate that thickness is 1.5mm, Aluminium sheet or iron plate.

6. steel compound noise reduction board according to claim 2, it is characterised in that the arrangement of reinforcement is bullion, the arrangement of reinforcement connects Connect the metal sound insulation layer of the c-type structure.

7. the steel compound noise reduction board according to claim any one of 1-6, it is characterised in that the gross thickness of the steel compound noise reduction board For between 20mm to 40mm.

8. a kind of denoising device, it is characterised in that including the steel compound noise reduction board described in claim any one of 1-7, it is described compound The railway carriage or compartment type structure enclosed with six bread is spliced to form between noise reducing plate.

9. denoising device according to claim 8, it is characterised in that to be detachably connected between the steel compound noise reduction board.

10. denoising device according to claim 9, it is characterised in that the junction of the steel compound noise reduction board is provided with positioning Component.

11. denoising devices according to claim 9, it is characterised in that the contact surface that the steel compound noise reduction board is connected it Between be provided with sealing strip.

12. denoising devices according to claim 11, it is characterised in that for clamping is connected between the steel compound noise reduction board.

13. denoising devices according to claim 12, it is characterised in that the access section of the steel compound noise reduction board be bearing pin and The attachment structure of pin-and-hole, or projection and groove fit attachment structure.

14. denoising devices according to claim 12, it is characterised in that the steel compound noise reduction board is provided with clamping in access section Breach, clamping forms ladder card access surface between the clamping breach.

15. denoising devices according to claim 14, it is characterised in that described also including the adjustable connecting elements of activity Adjustable connecting elements is located at the ladder access section of the steel compound noise reduction board.

16. denoising devices according to claim 15, it is characterised in that the adjustable connecting components are the cabinet lock of formula of tightening up, The steel compound noise reduction board is provided with Angle connection part in the ladder access section, and the both sides of the Angle connection part connect two respectively The steel compound noise reduction board being connected to each other, the cabinet lock connection Angle connection part, so as to connect the steel compound noise reduction board.