Pressure relief sound absorbing and insulating board

Abstract

The present invention relates to the field of sound absorbing and sound insulating equipment, and discloses a pressure relief type sound absorbing and sound insulating board. The pressure relief type sound absorbing and sound insulating board comprises at least one board body, wherein the board body comprises a barrier board and pressure relief plates arranged on both sides of the barrier board, wherein the pressure relief plates are arranged at intervals from the barrier board so that a first pressure relief cavity is formed between the pressure relief plates and the barrier board, and the pressure relief plates are evenly distributed with a plurality of pressure relief blocks for gas to pass through, and the interior of the pressure relief blocks is hollow to form a second pressure relief cavity. The present invention arranges pressure relief plates on both sides of the shielding plate, respectively, and the pressure relief plates play a role in protecting the shielding plate, thereby effectively solving the weather resistance of the sound absorbing and sound insulating board and ensuring its long-term noise reduction performance; at the same time, through the structural design of the pressure relief plates, the airflow organization on the surface of the sound absorbing and sound insulating board is changed, so that the wind forces interfere with each other and cancel each other out, thereby achieving the purpose of reducing the wind pressure generated by the pulse airflow when the sound absorbing and sound insulating board is used in railways and highways and when vehicles pass through.

Description

Technical Field

[0001] The invention relates to the field of sound absorbing and sound insulating equipment, and in particular to a pressure relief type sound absorbing and sound insulating board. Background Art

[0002] Sound barriers are generally set up on the shoulders of both sides of the highway and railway, and are composed of steel structure frames, sound barrier panels and accessories. The sound barrier panels include sound-absorbing materials (ultra-fine glass wool) on the side facing the traffic noise, and galvanized steel plates for sound insulation on the other side. It is an effective way to prevent the strong traffic noise generated by vehicles on highways and railways from causing harm to specific areas such as residents, hospitals, schools, and government agencies on both sides of the line. However, traditional conventional sound barriers have the following defects:

[0003] (1) The ultra-fine centrifugal glass wool sound-absorbing material on the surface of the sound barrier has fluffy and interlaced fibers inside the ultra-fine glass wool, and there are a large number of tiny pores that connect the inside and outside. When sound waves are incident on the centrifugal glass wool, the sound waves can enter the material through the pores, causing the air molecules in the pores to vibrate. Due to the viscous resistance of the air and the friction between the air molecules and the pore walls, the sound energy is converted into heat energy and lost. Therefore, when these pores are blocked or the centrifugal glass wool collapses, the sound absorption performance will be greatly reduced or even lost;

[0004] (2) The sound barrier board is made of galvanized steel plate used for sound insulation. Its sound insulation is mainly determined by the thickness and density of the plate. When the plate surface is damaged and rusted, the structure of the plate surface changes, the sound insulation decreases, and the appearance is affected;

[0005] (3) When sound barriers are installed on the shoulders of roads and railways, it is equivalent to setting up an airtight wall. When the wind blows, it needs to withstand wind loads. When cars and trains pass by, it needs to withstand the wind pressure generated by the pulse airflow. This part of the force will be transmitted to the shoulders or bridges through the columns, which will have a certain impact on the construction of the sound barriers. Summary of the invention

[0006] In order to solve the above technical problem or at least partially solve the above technical problem, the present invention provides a pressure relief sound absorbing and insulating panel.

[0007] The present invention provides a pressure relief sound absorbing and insulating plate, the pressure relief sound absorbing and insulating plate comprising at least one plate body, the plate body comprising a barrier plate and pressure relief plates arranged on both sides of the barrier plate, the pressure relief plates and the barrier plates are arranged at intervals so that a first pressure relief cavity is formed between the pressure relief plates and the barrier plates, a plurality of pressure relief blocks for gas to pass through are evenly distributed on the pressure relief plates, and the interior of the pressure relief blocks is hollow to form a second pressure relief cavity.

[0008] Optionally, the pressure relief block is configured as:

[0009] The gases entering through the air inlet side of the pressure relief block interfere with each other;

[0010] The gases discharged through the air outlet sides of the pressure relief blocks interfere with each other and / or the gases discharged through the air outlet sides of two adjacent pressure relief blocks interfere with each other.

[0011] Optionally, the pressure relief block includes a first plate body and a second plate body that are interlocked with each other, so that a vertical cross-section of the second pressure relief cavity surrounded by the first plate body and the second plate body is polygonal.

[0012] Optionally, the first plate body includes a first vertical plate and a first inclined plate respectively connected to both ends of the first vertical plate, the second plate body includes a second vertical plate and a second inclined plate respectively connected to both ends of the second vertical plate, and the ends of the two first inclined plates are respectively connected to the ends of the two second inclined plates.

[0013] Optionally,

[0014] A plurality of first straight holes are evenly distributed on the first vertical plate, a plurality of first inclined holes are evenly distributed on the first inclined plate, and the apertures of the first straight holes are larger than the apertures of the first inclined holes;

[0015] A plurality of second straight holes are evenly distributed on the second vertical plate, a plurality of second inclined holes are evenly distributed on the second inclined plate, and the diameter of the second straight holes is larger than the diameter of the second inclined holes.

[0016] Optionally, the first plate body is arranged on a side of the second plate body away from the barrier plate, and the aperture of the first straight hole is larger than that of the second straight hole, and the aperture of the first inclined hole is larger than that of the second inclined hole.

[0017] Optionally, an included angle between the first vertical plate and the first inclined plate is 120-140°, and an included angle between the second vertical plate and the second inclined plate is 120-140°.

[0018] Optionally, an angle between the first inclined plate and the second inclined plate is 90-110°.

[0019] Optionally, the barrier panel includes a sound absorbing panel and a sound insulating panel arranged on one side of the sound absorbing panel.

[0020] Optionally, the plate body further comprises a bracket for mounting the barrier plate and the pressure relief plate, and water leakage holes are respectively provided at the top and the bottom of the bracket.

[0021] The technical solution provided by the embodiment of the present invention has the following advantages compared with the prior art:

[0022] In the present invention, pressure relief plates are respectively arranged on both sides of the shielding plate, and the pressure relief plates play a role in protecting the shielding plate, thereby effectively solving the weather resistance of the sound-absorbing and insulating plate and ensuring its long-term noise reduction performance; at the same time, through the structural design of the pressure relief plates, the airflow organization on the surface of the sound-absorbing and insulating plate is changed, so that the wind forces interfere with each other and cancel each other out, so as to achieve the purpose of reducing the wind pressure generated by the pulse airflow when the sound-absorbing and insulating plate is used in railways and highways and when vehicles pass by. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0024] In order to more clearly illustrate the implementation mode of the present invention or the technical solution in the prior art, the drawings required for use in the implementation mode or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 It is a schematic structural diagram of the pressure relief sound absorbing and insulating panel according to an embodiment of the present invention.

[0026] Description of Reference Numerals

[0027] 1. Barrier plate; 11. Sound absorbing plate; 12. Sound insulation plate; 2. Pressure relief plate; 3. First pressure relief chamber; 4. Pressure relief block; 5. Second pressure relief chamber; 6. First plate body; 61. First vertical plate; 62. First inclined plate; 7. Second plate body; 71. Second vertical plate; 72. Second inclined plate; 8. Bracket. DETAILED DESCRIPTION

[0028] In order to more clearly understand the above-mentioned objectives, features and advantages of the present invention, the scheme of the present invention will be further described below. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0029] The following description sets forth many specific details to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; obviously, the implementation methods in the specification are only part of the implementation methods of the present invention, rather than all of the implementation methods.

[0030] like Figure 1As shown, the pressure relief sound-absorbing and insulating panel provided in the embodiment of the present invention includes at least one plate body. That is, the sound-absorbing and insulating panel can be arranged in a way of an integral plate body, or in a way of splicing a plurality of plate bodies. Among them, since the size of the entire sound-absorbing and insulating panel is relatively large, in order to ensure the structural strength, it is preferred that the sound-absorbing and insulating panel be arranged in a way of splicing a plurality of plate bodies. The plate body includes a barrier plate 1 and a pressure relief plate 2 arranged on both sides of the barrier plate 1. The pressure relief plate 2 is spaced apart from the barrier plate 1 so that a first pressure relief chamber 3 is formed between the pressure relief plate 2 and the barrier plate 1, and a plurality of pressure relief blocks 4 through which gas can pass are evenly distributed on the pressure relief plate 2, and the interior of the pressure relief block 4 is hollow to form a second pressure relief chamber 5.

[0031] In the present invention, pressure relief plates 2 are respectively arranged on both sides of the shielding plate, and the pressure relief plates 2 play a role in protecting the shielding plate, thereby effectively solving the weather resistance of the sound-absorbing and insulating plate and ensuring its long-term noise reduction performance; at the same time, through the structural design of the pressure relief plates 2, the airflow organization on the surface of the sound-absorbing and insulating plate is changed, so that the wind forces interfere with each other and cancel each other out, so as to achieve the purpose of reducing the wind pressure generated by the pulse airflow when the sound-absorbing and insulating plate is used in railways and highways and when vehicles pass by.

[0032] In some embodiments, the pressure relief block 4 is configured so that the gases entering through the air inlet side of the pressure relief block 4 interfere with each other, thereby causing the airflows entering the second pressure relief chamber 5 through the air inlet side of the pressure relief block 4 to cancel each other out, thereby achieving a primary effect of reducing wind pressure. The gases discharged through the air outlet side of the pressure relief block 4 interfere with each other and / or the gases discharged through the air outlet sides of two adjacent pressure relief blocks 4 interfere with each other. Thus, the airflows discharged into the first pressure relief chamber 3 through the air outlet side of the pressure relief block 4 cancel each other out, thereby achieving a secondary effect of reducing wind pressure.

[0033] like Figure 1 As shown, the pressure relief block 4 includes a first plate body 6 and a second plate body 7 that are interlocked, and the vertical cross-section of the second pressure relief chamber 5 surrounded by the first plate body 6 and the second plate body 7 is polygonal, so that the airflow entering the second pressure relief chamber 5 is depressurized after colliding with each other, and the pressure reduction effect is effectively achieved. And this design method makes the cross-section of the first pressure relief chamber 3 serrated, so that the gas discharged from the air outlet side of the two adjacent pressure relief blocks 4 is depressurized after colliding with each other. Under this design method, the residual part of the airflow after interfering and consuming energy in the second pressure relief chamber 5 changes the airflow direction again through the first pressure relief chamber 3, and then continues to interfere and consume energy in the first pressure relief chamber 3, achieving the purpose of secondary pressure relief and ensuring the pressure relief effect.

[0034] Specifically, the first plate body 6 includes a first vertical plate 61 and a first inclined plate 62 respectively connected to the two ends of the first vertical plate 61, and the second plate body 7 includes a second vertical plate 71 and a second inclined plate 72 respectively connected to the two ends of the second vertical plate 71. The ends of the two first inclined plates 62 are respectively connected to the ends of the two second inclined plates 72, so that the cross-section of the pressure relief block 4 surrounded by the first plate body 6 and the second plate body 7 is an unequal hexagon, so that the structure of the pressure relief block 4 is more stable and the pressure relief effect is ensured. Further optimized, the first plate body 6 is arranged on the side of the second plate body 7 away from the barrier plate 1, and the aperture of the first straight hole is larger than the aperture of the second straight hole, and the aperture of the first inclined hole is larger than the aperture of the second inclined hole. In this design, since the gas entering the second pressure relief chamber 5 has changed its flow path through the first plate body 6 and then collides with each other in the second pressure relief chamber 5 to relieve pressure, its wind speed and pressure are relatively reduced. Therefore, the aperture of the second plate body 7 is designed to be smaller than the aperture of the first plate body 6, so that the second plate body 7 can change the transmission path of the gas with lower wind speed and pressure, thereby causing the gas entering the first pressure relief chamber 3 to collide with each other to achieve secondary pressure relief.

[0035] In some preferred embodiments, a plurality of first straight holes are evenly distributed on the first vertical plate 61, and a plurality of first oblique holes are evenly distributed on the first inclined plate 62, and the aperture of the first straight hole is larger than the aperture of the first oblique hole. Specifically, the first plate body 6 is made of aluminum alloy plate, the perforation rate of the first plate body 6 is 50-60%, the thickness is 1.5-2mm, the aperture of the first straight hole is 6-12mm, and the aperture of the first oblique hole is 4-6mm. The peak height of the first plate body 6 is 45-50mm, wherein the peak of the first plate body 6 is the vertical distance from the first vertical plate 61 to the center line of the pressure relief block 4. The vertical side width at the peak of the first plate body 6 is 20-25mm, and the vertical side width at the trough of the first plate body 6 (the connection between the first oblique plate 62 and the second oblique plate 72) is 25-30mm. This design method changes the direction of the airflow through the first oblique hole, thereby causing the gases to interfere with each other in the second pressure relief chamber 5 and consume energy, thereby achieving the purpose of primary pressure relief.

[0036] A plurality of second straight holes are evenly distributed on the second vertical plate 71, and a plurality of second oblique holes are evenly distributed on the second oblique plate 72, and the aperture of the second straight hole is larger than the aperture of the second oblique hole. Specifically, the second plate body 7 is made of aluminum alloy plate, the perforation rate of the second plate body 7 is 50-60%, the thickness is 1.2-1.5mm, the aperture of the second straight hole is 4-6mm, and the aperture of the second oblique hole is 3-5mm. The peak height of the second plate body 7 is 45-50mm, wherein the peak of the second plate body 7 is the vertical distance from the second vertical plate 71 to the center line of the pressure relief block 4. The vertical side width at the peak of the second plate body 7 is 20-25mm, and the vertical side width at the trough of the second plate body 7 (the connection between the second oblique plate 72 and the first oblique plate 62) is 25-30mm.

[0037] The angle between the first vertical plate 61 and the first inclined plate 62 is 120-140°, preferably, the angle between the first vertical plate 61 and the first inclined plate 62 is 130°. The angle between the second vertical plate 71 and the second inclined plate 72 is 120-140°, preferably, the angle between the second vertical plate 71 and the second inclined plate 72 is 130°. The angle between the first inclined plate 62 and the second inclined plate 72 is 90-110°, preferably, the angle between the first inclined plate 62 and the second inclined plate 72 is 100°. The pressure relief block 4 using this embodiment can achieve a better pressure relief effect through the interaction between the first plate body 6 and the second plate body 7 of different apertures. In addition, the pressure relief block 4 of this design method can also play a certain role in hindering the transmission of sound, thereby increasing the sound absorption and sound insulation effect of the barrier plate 1.

[0038] like Figure 1 As shown, the barrier panel 1 includes a sound absorbing panel 11 and a sound insulating panel 12 arranged on one side of the sound absorbing panel 11. When in use, the sound absorbing panel 11 is arranged on one side of a vehicle passing through a railway or a highway, so that the barrier panel 1 first absorbs sound and then insulates sound, so that it meets the design requirements. Specifically, the sound absorbing block is a metal sound absorbing block, specifically a metal aluminum foam product. The thickness of the sound absorbing block is 10-15mm, the pore size is 0.3-3mm, the porosity is 85%--90%, and the sound absorption coefficient is 0.75-0.8 to ensure the sound absorption effect. The sound insulating block uses an aluminum alloy plate with a thickness of 1.5-2.0mm, and the side of the sound insulating block close to the sound absorbing block is coated with 2mm damping. The tensile strength of the damping is 6-7Mpa, and the damping coefficient is greater than 0.45-0.5 to ensure that the sound insulation effect is met.

[0039] The plate body also includes a bracket 8 for installing the barrier plate 1 and the pressure relief plate 2. The bracket 8 plays the role of installing and supporting the barrier plate 1 and the pressure relief plate 2. Leakage holes are respectively provided at the top and bottom of the bracket 8 to avoid rainwater accumulation inside the bracket 8 and to avoid affecting the service life of the barrier plate 1 and the pressure relief plate 2. Wherein, when there are multiple plate bodies, the leakage holes at the bottom of the upper bracket 8 are opposite to the leakage holes at the top of the lower bracket 8, so that rainwater can flow to the ground. Wherein, the bracket 8 is preferably folded from 1.5-2.0mm hot-dip galvanized sheet, and is applied to the surrounding frames and internal frames of the barrier plate 1 and the pressure relief plate 2. The upper and lower frames of the bracket 8 have a 20mm diameter drainage hole, and the internal frame spacing is not greater than 600×600mm, that is, the frame can be divided into multiple spliced ​​ones to increase the structural strength.

[0040] As the volume of railway freight increases year by year, the occasional noise generated by the passing of trains has gradually become frequent noise. The time interval between trains is less than 10 minutes, and the noise seriously affects the normal life of villagers, especially their rest at night. It is pre-adopted to install sound barriers on the shoulders of bridges to reduce noise. After verification, the bridge cannot withstand the crosswind load of the valley transmitted to it by the sound barrier at the shoulder. The bridge is at risk of overturning. Therefore, the sound barrier can only be built from the concrete foundation of the valley bottom. This will involve land acquisition, piling, space interference and other issues. The difficulty and cost of sound barrier construction will increase exponentially. After the pressure relief sound-absorbing and insulating board provided in this application is applied to the sound barrier, the wind load is effectively reduced by 30-40%. Through simple shoulder reinforcement, the structural strength requirements for setting up a sound barrier at the shoulder of the bridge can be met.

[0041] After the coastal expressway was put into operation, it became a key environmental protection project because of the heavy traffic, especially large trucks, which disturbed the normal life of the surrounding residents. A sound barrier was set up on the shoulder of the road in advance. Considering the frequent sea breezes along the coast, the foundation needed to be piled, but the coastal groundwater resources were abundant, and the construction difficulty was greatly increased. After the pressure relief sound-absorbing and insulating board was applied to the sound barrier, the impact of wind load on the foundation was reduced, the pile foundation was greatly shortened, and the underground seepage layer could be avoided, the construction difficulty was reduced, and the project cost was effectively reduced.

[0042] Due to the harsh environment along the railway, the surface anti-corrosion has fallen off in large quantities, the sound insulation board 12 has been severely corroded, and the sound-absorbing centrifugal glass wool filled inside has aged and collapsed, piling up into blocks, completely losing its sound absorption performance, and the sound barrier has gradually lost its basic noise reduction performance. In view of this, the pressure relief sound absorption board can replace the original damaged sound barrier board 1. Its internal stable metal foam aluminum sound absorption structure will not rust, nor will it weather and collapse. The sound insulation board 12 is made of aluminum and is not easy to rust. The pressure relief sound absorption board shows its excellent noise reduction performance and environmental weather resistance.

[0043] It can be seen that the pressure relief sound-absorbing and insulating board provided by the present invention has good weather resistance, good medium and low frequency sound absorption and insulation performance, stable acoustic sound absorption and insulation performance, can effectively utilize its own structural characteristics to release pressure, and is particularly suitable for sound barriers at bridges and embankments along roads and railways.

[0044] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0045] The above description is only a specific embodiment of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments described herein, but should conform to the widest scope consistent with the principles and novel features invented herein.

Claims

1. A pressure relief sound absorbing and insulating panel, characterized in that: The pressure relief sound absorbing and insulating panel comprises at least one panel body, the panel body comprising a barrier panel (1) and pressure relief panels (2) arranged on both sides of the barrier panel (1), the pressure relief panels (2) being arranged at intervals from the barrier panel (1) so that a first pressure relief cavity (3) is formed between the pressure relief panels (2) and the barrier panel (1), a plurality of pressure relief blocks (4) for gas to pass through are evenly distributed on the pressure relief panel (2), and the interior of the pressure relief blocks (4) is hollow to form a second pressure relief cavity (5); The pressure relief block (4) is configured as follows: The gases entering through the air inlet side of the pressure relief block (4) interfere with each other; The gases discharged through the air outlet side of the pressure relief block (4) interfere with each other and / or the gases discharged through the air outlet sides of two adjacent pressure relief blocks (4) interfere with each other; The pressure relief block (4) comprises a first plate body (6) and a second plate body (7) which are interlocked, and the vertical cross-section of the second pressure relief cavity (5) surrounded by the first plate body (6) and the second plate body (7) is polygonal; The first plate body (6) comprises a first vertical plate (61) and first inclined plates (62) respectively connected to two ends of the first vertical plate (61); the second plate body (7) comprises a second vertical plate (71) and second inclined plates (72) respectively connected to two ends of the second vertical plate (71); the ends of the two first inclined plates (62) are respectively connected to the ends of the two second inclined plates (72); The first vertical plate (61) is evenly distributed with a plurality of first straight holes, the first inclined plate (62) is evenly distributed with a plurality of first inclined holes, and the apertures of the first straight holes are larger than the apertures of the first inclined holes; A plurality of second straight holes are evenly distributed on the second vertical plate (71), a plurality of second inclined holes are evenly distributed on the second inclined plate (72), and the diameter of the second straight holes is larger than the diameter of the second inclined holes.

2. The pressure relief sound absorbing and insulating panel according to claim 1, characterized in that: The first plate body (6) is arranged on a side of the second plate body (7) away from the barrier plate (1), and the aperture of the first straight hole is larger than the aperture of the second straight hole, and the aperture of the first inclined hole is larger than the aperture of the second inclined hole.

3. The pressure relief sound absorbing and insulating panel according to claim 1, characterized in that: The included angle between the first vertical plate (61) and the first inclined plate (62) is 120-140°, and the included angle between the second vertical plate (71) and the second inclined plate (72) is 120-140°.

4. The pressure relief sound absorbing and insulating panel according to claim 1, characterized in that: The included angle between the first inclined plate (62) and the second inclined plate (72) is 90-110°.

5. The pressure relief sound absorbing and insulating panel according to any one of claims 1 to 4, characterized in that: The barrier panel (1) comprises a sound absorbing panel (11) and a sound insulating panel (12) arranged on one side of the sound absorbing panel (11).

6. The pressure relief sound absorbing and insulating panel according to any one of claims 1 to 4, characterized in that: The plate body also includes a bracket (8) for mounting the barrier plate (1) and the pressure relief plate (2), and water leakage holes are respectively provided at the top and the bottom of the bracket (8).

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