Road sound insulation window for noise pollution prevention and control

Abstract

The invention discloses a road sound insulation window for noise pollution prevention and control, and relates to the technical field of road sound insulation, the road sound insulation window comprises a bottom plate and a stand column, the stand column is arranged on the bottom plate, and the bottom plate is installed on the ground on the two sides of a road through expansion bolts; a light-transmitting window and a plurality of sound-absorbing plates are arranged between every two adjacent stand columns, and the two ends of the light-transmitting window and the two ends of the sound-absorbing plates are connected with the two corresponding stand columns correspondingly; the sound absorption plate comprises a back plate and a front plate, and the back plate and the front plate are attached and fixedly connected. The back plate is positioned on one side of the front plate away from the road center; a plurality of sound absorption grooves are formed in the front plate, a closed sound absorption cavity is formed in the front plate, and the sound absorption cavity is filled with sound absorption filler; the front plate is made of rubber; the technical effects that low-frequency noise and high-frequency noise can be effectively handled at the same time, and then the road traffic noise is effectively reduced are achieved.

Description

Technical Field

[0001] This invention relates to the field of road sound insulation technology, and more particularly to a road sound insulation window for noise pollution control. Background Technology

[0002] With the continuous advancement of urbanization, road traffic noise pollution has become one of the major environmental problems affecting the quality of life of urban residents. Especially in areas with high traffic volume and speed, such as main urban roads, highways, and overpasses, the noise generated by vehicles travels through the air, causing serious noise pollution to surrounding residential areas, schools, hospitals, and other sensitive areas. Long-term exposure to high-noise environments not only affects people's work and study efficiency but may also lead to health problems such as hearing loss, sleep disorders, and cardiovascular diseases. Therefore, how to effectively reduce road traffic noise and improve the quality of the acoustic environment has become an important issue in the fields of urban planning and environmental protection.

[0003] Currently, road noise insulation facilities are one of the main means of reducing traffic noise transmission. Among them, soundproof windows, as a common noise reduction device, are widely used in noise barriers along both sides of roads. Existing road soundproof windows mostly adopt a single material or simple structural design, such as using only glass or acrylic sheets as the main sound insulation material, or using simple sound-absorbing materials for filling. While these types of soundproof windows can block and absorb high-frequency noise to a certain extent, their noise reduction effect on low-frequency noise is poor. Low-frequency noise, due to its longer wavelength, higher energy, and stronger penetrating power, is difficult for traditional soundproof windows to effectively block, resulting in an overall unsatisfactory noise reduction effect. Furthermore, the structural design of existing soundproof windows is relatively fixed, lacking flexibility and adaptability, and it is difficult to optimize and adjust them according to the noise spectrum characteristics of different road environments. For example, in areas with a high volume of heavy vehicles, low-frequency noise dominates, and existing soundproof windows cannot specifically enhance the blocking effect of low-frequency noise; in high-speed driving areas, high-frequency noise is more prominent, but the sound absorption performance of existing soundproof windows is limited, making it difficult to meet the needs of efficient noise reduction.

[0004] Therefore, there is an urgent need for a road soundproof window solution that can effectively address both low-frequency and high-frequency noise and has good adaptability, in order to meet the noise reduction needs of different road environments and noise characteristics, and further improve the overall performance and application effect of soundproof windows. Summary of the Invention

[0005] This application provides a road soundproof window for noise pollution control, which solves the technical problem that the prior art cannot effectively deal with low-frequency and high-frequency noise at the same time and cannot effectively reduce road traffic noise; it achieves the technical effect of being able to effectively deal with low-frequency and high-frequency noise at the same time, thereby effectively reducing road traffic noise.

[0006] This application provides a road soundproof window for noise pollution control, comprising a base plate and columns. The columns are mounted on the base plate, which is installed on the ground on both sides of the road. A light-transmitting window and multiple sound-absorbing panels are provided between each pair of adjacent columns, and the ends of the light-transmitting window and the sound-absorbing panels are respectively connected to the two corresponding columns. The sound-absorbing panel includes a back panel and a front panel, which are attached and fixedly connected. The back panel is located on the side of the front panel away from the center of the road. The front panel has multiple sound-absorbing grooves, and a sealed sound-absorbing cavity is formed inside the front panel, which is filled with sound-absorbing material. The material of the front panel is rubber.

[0007] Furthermore, grooves can be provided on both sides of the column, and mounting holes are reserved in the grooves; the sides of the sound-absorbing panel and the light-transmitting window can be inserted into the grooves on the column, and corresponding mounting holes are reserved on the light-transmitting window and the sound-absorbing panel. Bolts are connected to the mounting holes to fix the light-transmitting window and the sound-absorbing panel to the column.

[0008] Furthermore, the front panel includes multiple concave membranes and a housing, with the concave membranes separating the sound-absorbing cavity and the sound-absorbing groove; the housing has multiple internal openings on the side away from the back panel, and the number of internal openings is the same as that of the concave membranes and they correspond one-to-one; the concave membranes are hollow inside and open at one end, and the opening edge of the concave membrane is annular and sealed to the corresponding internal opening; wherein, the internal space of the concave membrane is the sound-absorbing groove.

[0009] Furthermore, the sound-absorbing filler has multiple openings corresponding to the concave membrane, so that the sound-absorbing filler inside the sound-absorbing cavity is staggered from the concave membrane.

[0010] Furthermore, both the shell and the concave membrane are made of rubber, and the elastic coefficient of the shell is greater than that of the concave membrane.

[0011] Furthermore, a pumping component is provided inside the sound-absorbing cavity, and the output end of the pumping component is connected to the sound-absorbing cavity and the external space.

[0012] Furthermore, the sound-absorbing cavity is provided with multiple limiting components, and the number of limiting components is the same as that of the concave membrane and they correspond one-to-one; the limiting components include a rope loop, a limiting rope, and a gravity block; the rope loop is disposed on the inner wall of the shell, and the rope loop is disposed opposite to the corresponding concave membrane; one end of the limiting rope is connected to the concave membrane, and the other end of the limiting rope passes through the rope loop and is connected to the gravity block; the gravity block is staggered from the sound-absorbing filling material.

[0013] Furthermore, the gravity block is made of a permanent magnet, and the back plate can be made of a ferromagnetic metal.

[0014] Furthermore, the sound-absorbing filler is gradient density sound-absorbing cotton, and the density of the sound-absorbing filler on the side closer to the back panel is greater than the density on the side farther from the back panel.

[0015] One or more technical solutions provided in this application have at least the following technical effects or advantages: By installing light-transmitting windows and sound-absorbing panels between adjacent columns, with sound-absorbing panels installed above and below the light-transmitting windows; the sound-absorbing panels include a back panel and a front panel, with the front panel having multiple sound-absorbing grooves and a sound-absorbing cavity filled with sound-absorbing material, the front panel is made of rubber, and the back panel is made of rigid material; this effectively solves the technical problem in existing technologies that cannot simultaneously and effectively cope with low-frequency and high-frequency noise, and cannot effectively reduce road traffic noise; thus achieving the technical effect of simultaneously and effectively coping with low-frequency and high-frequency noise, thereby effectively reducing road traffic noise. Attached Figure Description

[0016] Figure 1 This is an overall schematic diagram of the road soundproof window used for noise pollution control according to the present invention; Figure 2 This is an overall schematic diagram of the front panel of the road soundproof window used for noise pollution control according to the present invention. Figure 3 This is a schematic diagram of the front panel of the road soundproof window used for noise pollution control according to the present invention; Figure 4 This is a schematic diagram of the housing and concave membrane of the road soundproof window used for noise pollution control according to the present invention. Figure 5 This is a schematic diagram of the concave membrane of the road soundproof window used for noise pollution control in this invention under positive pressure. Figure 6 This is a schematic diagram showing the location of the limiting component of the road soundproof window used for noise pollution control according to the present invention; Figure 7 This is a schematic diagram of the limiting state of the limiting component of the road soundproof window used for noise pollution control according to the present invention; Figure 8 This is a schematic diagram of the limiting component of the road soundproof window used for noise pollution control according to the present invention.

[0017] In the diagram: 10, base plate; 20, column; 30, light-transmitting window; 40, sound-absorbing panel; 41, back panel; 42, front panel; 421, shell; 422, concave membrane; 43, sound-absorbing groove; 44, sound-absorbing cavity; 45, air pumping component; 50, restraining component; 51, rope loop; 52, restraining rope; 53, gravity block. Detailed Implementation

[0018] To facilitate understanding of the present invention, a more complete description of this application will be given below with reference to the accompanying drawings, which illustrate preferred embodiments of the invention. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to enable a more thorough and complete understanding of the disclosure of the present invention.

[0019] It should be noted that the terms "vertical," "horizontal," "up," "down," "left," "right," and similar expressions used in this article are for illustrative purposes only and do not represent the only possible implementation.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0021] Example 1: As Figures 1 to 3 As shown, the road soundproof window used for noise pollution prevention in this application includes a base plate 10 and a column 20.

[0022] The column 20 is installed on the base plate 10.

[0023] It should be noted that the column 20 can be vertically installed on the base plate 10 by welding or bolting, and the base plate 10 can be installed on the ground on both sides of the road by expansion bolts.

[0024] A light-transmitting window 30 and multiple sound-absorbing panels 40 are provided between each pair of adjacent columns 20, and the two ends of the light-transmitting window 30 and the sound-absorbing panels 40 are respectively connected to the two corresponding columns 20.

[0025] Sound-absorbing panels 40 are installed above and below the light-transmitting window 30.

[0026] Preferably, the number of sound-absorbing panels 40 can be 2 to 5.

[0027] It should be noted that the light-transmitting window 30 is a window structure with a window frame and a window sash. The window sash (which can be a fixed window sash) can be made of glass or acrylic. The structure of the light-transmitting window 30 is a common structure in the existing technology, and the size of the window sash can be selected according to actual needs, which will not be described in detail here.

[0028] Preferably, grooves are provided on both sides of the column 20, and mounting holes are reserved in the grooves; the sides of the sound-absorbing panel 40 and the light-transmitting window 30 can be inserted into the grooves on the column 20, and corresponding mounting holes are reserved on the light-transmitting window 30 and the sound-absorbing panel 40. Bolts can be connected to the mounting holes to fix the light-transmitting window 30 and the sound-absorbing panel 40 to the column 20. This connection structure is a common structure in the prior art and will not be described in detail here.

[0029] It should be noted that the road soundproof window used for noise pollution control in this embodiment is a prefabricated structure. Figure 1 The assembly structure in a single state is given in the text. The overall structure of the road soundproof window can be assembled sequentially from multiple assembly structures in a single state. This assembly method is existing technology and will not be described in detail here.

[0030] like Figure 2 As shown, the sound-absorbing panel 40 includes a back panel 41 and a front panel 42, and the back panel 41 and the front panel 42 are attached and fixedly connected.

[0031] The back panel 41 is located on the side of the front panel 42 away from the center of the road.

[0032] It should be noted that the back panel 41 and the front panel 42 can be connected together by bolts or adhesives, and the thickness of both can be selected according to actual needs, which will not be described in detail here.

[0033] The front panel 42 is provided with multiple sound-absorbing grooves 43.

[0034] Preferably, the number of sound-absorbing grooves 43 on each front panel 42 can be 30 to 60.

[0035] It should be noted that the specific number, location distribution, and size of the sound-absorbing grooves 43 are selected according to actual needs, and will not be detailed here.

[0036] The front panel 42 has a sealed sound-absorbing cavity 44 inside, and the sound-absorbing cavity 44 is filled with sound-absorbing filler (see reference). Figure 3 (The cross-sectional portion between the front middle plate 42 and the back plate 41).

[0037] The front panel 42 can be made of rubber.

[0038] Understandably, the front panel 42 is made of rubber, a high-damping material that effectively absorbs mid-to-high frequency noise. The front panel 42 has multiple sound-absorbing grooves 43, which increase the sound wave reflection path, causing the sound waves to reflect multiple times within the grooves and be absorbed by the rubber material, thus significantly reducing high-frequency noise. The back panel 41 can be made of a rigid material (metal or high-density composite material, such as a metal plate or concrete slab). The main function of the back panel 41 is to reflect and block low-frequency noise. Low-frequency noise has a long wavelength and is difficult to absorb directly by sound-absorbing materials, but its propagation can be reduced through the reflection and blocking effect of the back panel 41. The sound-absorbing cavity 44 is filled with... The sound-absorbing filler has a more significant absorption effect on high-frequency noise and also has a certain absorption effect on low-frequency noise. Combined with the reflection effect of the back panel 41, it can further reduce the impact of low-frequency noise. The light-transmitting window 30 is set between the sound-absorbing panels 40, which can not only ensure the lighting needs on both sides of the road, but also further block the transmission of noise through its structure. In addition, through the cooperation of the front panel 42 and the sound-absorbing filler, the side of the sound-absorbing panel 40 facing the road is a flexible structure, which can play a certain protective role. When a vehicle collides with the sound-absorbing panel 40, the sound-absorbing panel 40 can absorb some of the impact energy, play a buffering and protective role, and reduce the damage caused by the car accident.

[0039] Preferably, the areal density of the back plate 41 can be 15-30 kg / m³. 2 The thickness can be 3-6 mm, such as 20 kg / m² galvanized steel sheet (4 mm thick) or 25 kg / m² fiber cement board.

[0040] Preferably, the sound-absorbing filler can be gradient density sound-absorbing cotton, and the density of the sound-absorbing filler on the side closer to the back panel 41 is greater than the density on the side farther from the back panel 41; for example, the sound-absorbing filler near the back panel 41 is a high-density layer (volume density of 80-120 kg / m³). 2 The sound-absorbing filling portion away from the back panel 41 is a low-density layer (volume density of 30-60 kg / m³). 2 Additionally, the sound-absorbing filler can be configured as a porous structure.

[0041] It should be noted that in this example, the absorption or reflection of low-frequency noise waves is achieved through the combined action of the back panel 41, the front panel 42, and the sound-absorbing filler within the sound-absorbing cavity 44. The front panel 42 has a sealed sound-absorbing cavity 44, which provides space for the absorption of low-frequency noise. When low-frequency noise enters the sound-absorbing cavity 44, it undergoes multiple reflections and refractions, increasing the contact time and area between the sound waves and the sound-absorbing material, thus facilitating the absorption of low-frequency noise. The high-density layer (80-120...) The high-density layer (kg / m³) is located near the back panel 41, forming a gradually changing acoustic impedance structure with the back panel 41 to reduce low-frequency standing wave reflection. The high-density layer has a certain absorption effect on low-frequency noise, which can initially dissipate the energy of low-frequency noise. The low-density layer further absorbs the low-frequency noise after reflection and refraction by the high-density layer, improving the overall absorption effect of low-frequency noise. When low-frequency noise encounters the back panel 41, the back panel 41 reflects the low-frequency noise back and it comes into contact with the sound-absorbing material again, preventing some low-frequency noise from directly penetrating the back panel 41 and entering the other side of the road. At the same time, the rigid structure of the back panel 41 can also block the propagation of low-frequency noise to a certain extent and reduce the transmittance of low-frequency noise.

[0042] To illustrate the sound insulation effect of a single-layer wall for back panel 41: Assuming back panel 41 is made of 20kg / m² galvanized steel sheet, for noise at a frequency of 125Hz, according to the mass law of sound insulation for a single-layer wall: in, For frequency, Surface density (unit: kg / m³) 2 ).

[0043] Substituting into the formula, the achievable sound insulation at 125Hz is: The technical solutions described in the embodiments of this application have at least the following technical effects or advantages: 1. The combination of the back panel 41 and the front panel 42 enables the soundproof window to effectively reduce both low-frequency and high-frequency noise at the same time, achieving noise control across the entire frequency band. 2. The sound-absorbing grooves 43 on the front panel 42 increase the reflection path of sound waves, so that the sound waves are reflected multiple times in the sound-absorbing grooves 43 and come into contact with the rubber material, thereby significantly enhancing the absorption effect of high-frequency noise. 3. By setting the sound-absorbing panel 40, it can effectively insulate sound while also providing a certain degree of protection and impact resistance.

[0044] Example 2: In the above embodiment, after rain or snow, some mud and dirt may accumulate inside the sound-absorbing groove 43, which will eventually cause the sound-absorbing groove 43 to be blocked, and the sound absorption effect of the sound-absorbing groove 43 cannot be well utilized; the embodiment of this application is based on the above embodiment with certain optimizations.

[0045] like Figure 4 and Figure 5 As shown, the front panel 42 includes a plurality of concave membranes 422 and a housing 421, and the concave membranes 422 separate the sound-absorbing cavity 44 and the sound-absorbing groove 43.

[0046] Among them, the number of concave membranes 422 and sound-absorbing grooves 43 are the same and correspond one-to-one.

[0047] The side of the housing 421 away from the back plate 41 has multiple internal openings, and the number of internal openings is the same as the number of concave membranes 422 and they correspond one-to-one.

[0048] The concave membrane 422 is hollow inside and open at one end. The opening edge of the concave membrane 422 is annular and sealed to the corresponding inner opening.

[0049] The internal space of the concave membrane 422 is the sound-absorbing groove 43.

[0050] It should be noted that the size and shape of the concave membrane 422 can be selected according to actual needs, and will not be described in detail here.

[0051] It should be noted that the shape of the concave membrane 422 can be referenced as a hemispherical shape. In this embodiment, the sound-absorbing cavity 44 is opened inside the housing 421, and in the initial state, the concave membrane 422 protrudes towards the back plate 41. At this time, a groove is formed on the side of the concave membrane 422 away from the back plate 41. This groove is the sound-absorbing groove 43. Therefore, the sound-absorbing groove 43 in this embodiment is the internal groove part of the concave membrane 422, and as the concave membrane 422 deforms, the spatial shape of the sound-absorbing groove 43 will change accordingly.

[0052] Both the shell 421 and the concave membrane 422 are made of rubber, and the elastic modulus of the shell 421 is greater than that of the concave membrane 422.

[0053] It should be noted that the elastic coefficients of the shell 421 and the concave membrane 422 are selected according to actual needs, and will not be detailed here.

[0054] Furthermore, such as Figure 4 As shown, a pumping component 45 is provided inside the sound-absorbing cavity 44. The output end of the pumping component 45 is connected to the sound-absorbing cavity 44 and the output end of the pumping component 45 is connected to the external space.

[0055] The air pumping component 45 may be an air pump controlled by a solenoid valve.

[0056] It should be noted that the output end of the air pumping component 45 may be provided with a waterproof and dustproof protective structure. This protective structure is existing technology and will not be described in detail here. The air pumping component 45 may be installed on the housing 421, and a maintenance port may be provided at a corresponding position on the housing 421 for maintenance or replacement of the air pumping component 45.

[0057] It should be noted that the concave membrane 422 separates the sound-absorbing cavity 44 and the sound-absorbing groove 43, and the sound-absorbing groove 43 is connected to the external environment. The sound-absorbing cavity 44 is a sealed space, and the air-pumping component 45 is located inside the sound-absorbing cavity 44. The sound-absorbing cavity 44 is filled with sound-absorbing filler, which has a certain degree of air permeability (it is a porous structure or has gas channels inside), so that the sound-absorbing filler will not affect the operation of the air-pumping component 45. Specifically, when the air-pumping component 45 is running, the gas can flow through the sound-absorbing filler. When the sound-absorbing cavity 44 is under positive or negative pressure, the concave membrane 422 can be subjected to the pressure of the gas. This kind of sound-absorbing filler is existing technology and will not be described in detail here.

[0058] Preferably, the concave membrane 422 is made of EPDM rubber, and the surface of the concave membrane 422 is coated with a protective coating, such as a silicone coating, to block oxygen, ozone and ultraviolet rays, thereby improving the service life of the concave membrane 422.

[0059] It should be noted that the air pressure inside the sound-absorbing cavity 44 is controlled by the air pumping component 45, so that the size and shape of the sound-absorbing cavity 44 and the size and shape of the sound-absorbing groove 43 in this embodiment can change with the deformation of the concave membrane 422. Specifically, the air pumping component 45 is located inside the sound-absorbing cavity 44. When the sound-absorbing cavity 44 is under positive pressure, the concave membrane 422 contracts under the action of air pressure. At this time, the space of the sound-absorbing cavity 44 becomes larger and the space of the sound-absorbing groove 43 becomes smaller. When the internal air pressure exceeds the set threshold (which can be set according to actual needs), the concave membrane 422 is squeezed out of the shell 421 under the action of air pressure. At this time, the concave membrane 422 bulges away from the back plate 41, and the sound absorption groove 43 temporarily disappears. When the concave membrane 422 returns to its original state, the sound absorption groove 43 reappears. When the sound absorption cavity 44 is in a negative pressure state, the concave membrane 422 expands under the action of air pressure. At this time, the space of the sound absorption cavity 44 becomes smaller and the space of the sound absorption groove 43 becomes larger.

[0060] It should be noted that the sound-absorbing cavity 44 is equipped with a power component and a control unit. The power component is used to power the operation of the air pumping component 45, preferably a battery or a solar power generation component; the control unit is used to coordinate the operation of the air pumping component 45, preferably a programmable logic controller, and relevant personnel can remotely operate the control unit; the power component and the control unit are both existing technologies and will not be described in detail here.

[0061] Specifically, Chinese utility model patent CN203452016U discloses a solar-powered sound-absorbing barrier, which is equipped with a solar power generation component and a lighting system. In this embodiment, the power component can refer to the solar power generation component in the existing sound-absorbing barrier, and the control unit can refer to the control system corresponding to the solar power generation component and lighting system in the existing sound-absorbing barrier.

[0062] It is understood that a pumping component 45 is installed inside the sound-absorbing cavity 44. The pumping component 45 is connected to the sound-absorbing cavity 44 through its output end and is also connected to the external space. When the pumping component 45 is running, it causes gas exchange between the sound-absorbing cavity 44 and the external environment. By controlling the pumping component 45 to discharge the gas inside the sound-absorbing cavity 44 into the external environment, the sound-absorbing cavity 44 is in a negative pressure state. At this time, the concave diaphragm 422 expands into the sound-absorbing cavity 44 under the action of the negative pressure of the gas. At this time, the space of the sound-absorbing groove 43 becomes larger, which can better reflect and absorb sound waves. By controlling the pumping component 45 to draw the gas from the external environment into the sound-absorbing cavity 44, the sound-absorbing cavity 44 is in a positive pressure state. Under the positive pressure of the gas, the concave diaphragm 422 will contract tightly together, reducing the internal space of the sound-absorbing groove 43. As the air pressure inside the sound-absorbing cavity 44 increases, the concave diaphragm 422 is squeezed out of the sound-absorbing cavity 44, bulging outward. At this time, some dirt on the concave diaphragm 422 will fall off. During the process of the concave diaphragm 422 being squeezed out of the sound-absorbing cavity 44, the inner walls of the concave diaphragm 422 will rub against each other, and the concave diaphragm 422 will vibrate, so that when the concave diaphragm 422 is on the outside, the dirt on the concave diaphragm 422 can fall off more effectively. In addition, the size of the sound-absorbing groove 43 can be adjusted by controlling the air pressure inside the sound-absorbing cavity 44 to adapt to different usage environments.

[0063] Furthermore, in this embodiment, the air pumping component 45 does not need to operate continuously. It can be shut off after adjusting the air pressure in the sound absorption cavity 44. Under the action of the solenoid valve (not shown in the figure) inside the air pumping component 45, the gas in the sound absorption cavity 44 will not leak out. In addition, when it is necessary to flip the concave diaphragm 422, it can be operated according to the cleaning frequency. For example, in a relatively clean environment, it can be cleaned once a quarter, and the concave diaphragm 422 only needs to be flipped once a quarter. In a dusty environment, it can be cleaned once a month, and the concave diaphragm 422 only needs to be flipped once a month. During this process, the air pumping component 45 is in a low-frequency operation state, and the air pumping component 45 is located in the sound absorption cavity 44, which can be protected, reducing maintenance costs and reducing the risk of aging. Similarly, the concave diaphragm 422 in this embodiment undergoes low-frequency deformation, which is much lower than the common frequency in rubber fatigue tests (such as thousands to tens of thousands of cycles). Therefore, from the perspective of deformation frequency alone, it has a very small impact on fatigue life.

[0064] Preferably, a pressure sensor can be built into the air pumping component 45, which is existing technology and will not be described in detail here.

[0065] It should be noted that when cleaning the road soundproof window of this application, a cleaning truck can be used to rinse it with high-pressure water. At this time, the concave membrane 422 can be controlled to flip, and the cleaning is more thorough.

[0066] Preferably, the sound-absorbing filler has multiple openings corresponding to the concave membrane 422, so that the sound-absorbing filler inside the sound-absorbing cavity 44 is staggered from the concave membrane 422, and the sound-absorbing filler can be connected to the inner wall of the housing 421 by an adhesive.

[0067] It should be noted that each sound-absorbing cavity 44 may be equipped with an air pumping component 45, or adjacent back panels 41 may share an air pumping component 45. In this case, adjacent sound-absorbing cavities 44 may be connected through an air supply pipe. The specific method may be selected according to actual needs, and will not be described in detail here.

[0068] The technical solutions described in the embodiments of this application have at least the following technical effects or advantages: 1. By adjusting the air pressure of the pumping component 45, the concave diaphragm 422 can automatically expand and contract, effectively removing dirt and grime from the sound-absorbing groove 43, keeping the sound-absorbing groove 43 clean, and ensuring a long-lasting and stable sound absorption effect. 2. By controlling the air pressure inside the sound-absorbing cavity 44, the size of the sound-absorbing groove 43 can be dynamically adjusted to adapt to different noise environments and frequency requirements, thereby improving the adaptability of the soundproof window.

[0069] Example 3: In the above examples, in environments with high temperatures (such as areas with large day-night temperature differences and high daytime temperatures), the gas inside the sound-absorbing cavity 44 expands due to heat, causing the concave membrane 422 to be compressed, which may result in a smaller depth of the sound-absorbing groove 43 and a weakening of the sound reflection effect; the embodiments of this application are based on the above embodiments with certain optimizations.

[0070] like Figures 6 to 8 As shown, the sound-absorbing cavity 44 is provided with multiple limiting components 50, and the number of limiting components 50 is the same as that of the concave membrane 422 and they correspond one-to-one.

[0071] The restraint component 50 includes a rope loop 51, a restraint rope 52, and a gravity block 53.

[0072] The rope loop 51 is disposed on the inner wall of the housing 421, and the rope loop 51 is disposed opposite to the corresponding concave membrane 422.

[0073] One end of the restraining rope 52 is connected to the concave membrane 422, and the other end of the restraining rope 52 passes through the rope loop 51 and is connected to the gravity block 53.

[0074] The gravity block 53 is staggered from the sound-absorbing filler.

[0075] It should be noted that the mass of gravity block 53 is selected according to actual needs, and will not be detailed here.

[0076] Understandably, when the gas inside the sound-absorbing cavity 44 expands due to heat, the concave diaphragm 422 expands outward, and the pulling force of the gravity block 53 limits its excessive expansion, maintaining the stability of the depth of the sound-absorbing groove 43; when the gas inside the sound-absorbing cavity 44 cools and contracts, the pulling force of the gravity block 53 helps the concave diaphragm 422 return to its normal position, preventing the sound-absorbing groove 43 from being too shallow; in addition, the limiting component 50 and the air pumping component 45 can cooperate with each other, and when the air pumping component 45 fills the sound-absorbing cavity 44 with air, a certain shape is formed inside the sound-absorbing cavity 44. Under positive pressure, and when the tension generated by the positive pressure on the concave membrane 422 is less than the weight of the gravity block 53, the concave membrane 422 contracts and folds, while the depth of the sound-absorbing groove 43 remains unchanged, the inner diameter decreases, and the shape changes until the concave membrane 422 contracts together. At this time, the sound-absorbing groove 43 can become multiple narrow channels (formed by the contraction and folding of the concave membrane 422), enhancing the sound-absorbing groove 43's ability to reflect and absorb sound waves. When the tension generated by the positive pressure on the concave membrane 422 is greater than the weight of the gravity block 53, the concave membrane 422... 22 is slowly squeezed out of the sound-absorbing cavity 44. During this process, the gravity block 53 is pulled, and the depth of the sound-absorbing groove 43 decreases as the concave diaphragm 422 is squeezed out of the sound-absorbing cavity 44. When the concave diaphragm 422 is completely squeezed out of the sound-absorbing cavity 44, the concave diaphragm 422 bulges outward. However, under the restriction of the limiting component 50, the degree of protrusion of the concave diaphragm 422 is limited, and it will not protrude too much, making it easier for dirt and grime on the concave diaphragm 422 to fall off, and preventing residue from remaining due to excessive protrusion of the concave diaphragm 422. Similarly, When the pumping component 45 draws air into the sound absorption cavity 44, a negative pressure state is created inside the sound absorption cavity 44. The tension generated by the concave membrane 422 under the negative pressure state is less than the gravity of the gravity block 53. At this time, the concave membrane 422 expands into the sound absorption cavity 44, while the depth of the sound absorption groove 43 remains unchanged, the inner diameter increases, and the shape changes. This can avoid the phenomenon that the depth of the sound absorption groove 43 decreases due to the expansion of the concave membrane 422 into the sound absorption cavity 44 without the setting of the limiting component 50, thus preventing a decrease in the sound absorption effect.

[0077] Preferably, the gravity block 53 can be made of a permanent magnet, and the back plate 41 can be made of a ferromagnetic metal.

[0078] The material of the back plate 41 can be iron.

[0079] Understandably, the gravity block 53 and the back plate 41 can be magnetically attracted together, resulting in a large frictional force between the gravity block 53 and the inner wall of the shell 421. At this time, the gravity of the gravity block 53 and the frictional force can be used to pull the restraining rope 52. Therefore, a lighter and smaller gravity block 53 can be selected. In addition, it is also necessary to ensure that the gravity of the gravity block 53 is greater than the frictional force between the gravity block 53 and the inner wall of the shell 421 so that the gravity block 53 can be successfully reset.

[0080] It should be noted that the main function of the gravity block 53 is to provide tension through its own weight, limiting the excessive deformation of the concave membrane 422. The magnetic attraction is only used to fix the position of the gravity block 53 in the non-working state to reduce displacement interference caused by vibration, rather than as the main force-bearing structure. In addition, the gravity block 53 can be made of neodymium iron boron magnets. Special coating or encapsulation technology can be used to improve the corrosion resistance and anti-aging performance of neodymium iron boron magnets, so that its service life can reach 20 years or even longer. This is existing technology and will not be described here.

[0081] It should be noted that a groove may be provided in the sound-absorbing filling material at the position corresponding to the gravity block 53, and the gravity block 53 may slide in the groove, or the opening in the sound-absorbing filling material may be larger, so that the sound-absorbing filling material will not affect the movement of the gravity block 53.

[0082] It is important to note that the objective of this embodiment is to "control the depth change of the concave membrane 422" rather than precisely control the deformation; the core function of the limiting component 50 is to limit the excessive expansion or contraction of the concave membrane 422 through the constant tension of the gravity block 53, rather than precisely adjusting the deformation; specifically, when the concave membrane 422 is not limited by the limiting component 50, the concave membrane 422 is subjected to compressive force, and the surface is subjected to force in all directions. At this time, the concave membrane 422 will deform as a whole, causing the depth value of the concave membrane 422 to change. When the concave membrane 422 is limited by the limiting component 50... When the concave membrane 422 is subjected to compressive force, the surface will be subjected to force in all directions. Under the restriction of the limiting component 50, the side of the concave membrane 422 near the back plate 41 is pulled, so that the depth value of the concave membrane 422 does not change much (the compressive force on the concave membrane 422 does not exceed the limiting force of the limiting component 50). The concave membrane 422 shrinks and folds to form a narrow channel. When the compressive force on the concave membrane 422 exceeds the limiting force of the limiting component 50, the concave membrane 422 begins to bulge in the direction away from the back plate 41, making it easier for mud and dirt on the concave membrane 422 to fall off.

[0083] The technical solutions described in the embodiments of this application have at least the following technical effects or advantages: 1. The expansion and contraction of the concave membrane 422 are limited by the gravity of the gravity block 53, ensuring that the depth of the sound absorption groove 43 remains stable when the temperature or air pressure changes, and avoiding changes in the depth of the sound absorption groove 43 caused by the thermal expansion and contraction of the gas or the operation of the pumping component 45. 2. Through the cooperation of the air pumping component 45 and the limiting component 50, the inner diameter and shape of the sound-absorbing groove 43 can be dynamically adjusted; under positive pressure, the concave membrane 422 contracts and folds to form multiple narrow channels; under negative pressure, the concave membrane 422 expands, and the inner diameter of the sound-absorbing groove 43 increases; the shape change of the sound-absorbing groove 43 can enhance the multiple reflections and absorption of sound waves in the sound-absorbing groove 43, further improving the absorption effect of high-frequency noise, while adapting to different noise environment requirements; 3. After the concave membrane 422 is squeezed out of the sound absorption cavity 44, the degree of protrusion of the concave membrane 422 is controlled under the restriction of the gravity block 53, so as to avoid excessive protrusion, making it easier for dirt on the concave membrane 422 to fall off, and not leaving residue due to excessive protrusion, thus ensuring the cleanliness of the sound absorption groove 43 and maintaining long-term high-efficiency sound absorption performance.

[0084] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A road soundproof window for noise pollution control, comprising a base plate and columns, wherein the columns are mounted on the base plate and the base plate is installed on the ground on both sides of the road, characterized in that: A light-transmitting window and multiple sound-absorbing panels are provided between each pair of adjacent columns, and the two ends of the light-transmitting window and the sound-absorbing panels are respectively connected to the two corresponding columns. The sound-absorbing panel includes a back panel and a front panel, and the back panel and the front panel are attached and fixedly connected. The back panel is located on the side of the front panel away from the center of the road; The front panel is provided with multiple sound-absorbing grooves, and the front panel has a sealed sound-absorbing cavity inside, which is filled with sound-absorbing filler. The front panel is made of rubber.

2. The road soundproof window for noise pollution control as described in claim 1, characterized in that, The column can be provided with grooves on both sides, and the grooves are reserved with mounting holes; the sides of the sound-absorbing panel and the light-transmitting window can be inserted into the grooves on the column, and the light-transmitting window and the sound-absorbing panel are reserved with corresponding mounting holes, and bolts are connected to the mounting holes to fix the light-transmitting window and the sound-absorbing panel to the column.

3. The road soundproof window for noise pollution control as described in claim 1, characterized in that, The front panel includes multiple concave membranes and a housing, and the concave membranes separate the sound-absorbing cavity and the sound-absorbing groove. The shell has multiple internal openings on the side away from the back plate, and the number of internal openings is the same as the number of concave membranes and they correspond one-to-one. The concave membrane is hollow inside and open at one end, and the edge of the opening of the concave membrane is annular and sealed to the corresponding inner opening. The internal space of the concave membrane is the sound-absorbing groove.

4. The road soundproof window for noise pollution control as described in claim 3, characterized in that, The sound-absorbing filler has multiple openings corresponding to the concave membrane, so that the sound-absorbing filler inside the sound-absorbing cavity is staggered from the concave membrane.

5. The road soundproof window for noise pollution control as described in claim 3, characterized in that, Both the shell and the concave membrane are made of rubber, and the elastic coefficient of the shell is greater than that of the concave membrane.

6. The road soundproof window for noise pollution control as described in claim 3, characterized in that, The sound-absorbing cavity is equipped with a pumping component, the output end of which is connected to the sound-absorbing cavity and the external space.

7. The road soundproof window for noise pollution control as described in claim 6, characterized in that, The sound-absorbing cavity is provided with multiple limiting components, and the number of limiting components is the same as that of the concave membrane and they correspond one-to-one. The restraint assembly includes a rope loop, a restraint rope, and a gravity block; The rope loop is disposed on the inner wall of the shell, and the rope loop is disposed opposite to the corresponding concave membrane; One end of the restraining rope is connected to the concave membrane, and the other end of the restraining rope passes through the rope loop and is connected to the gravity block. The gravity block is staggered from the sound-absorbing filler.

8. The road soundproof window for noise pollution control as described in claim 7, characterized in that, The gravity block is made of permanent magnets, and the back plate is made of ferromagnetic metal.

9. The road soundproof window for noise pollution control as described in any one of claims 1 to 8, characterized in that, The sound-absorbing filler is gradient density sound-absorbing cotton, and the density of the sound-absorbing filler on the side closer to the back panel is greater than the density on the side farther from the back panel.

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