Variable inclination noise reduction type ecp sound barrier

Abstract

The utility model belongs to the technical field of sound barrier, concretely relates to a variable inclination angle noise reduction type ECP sound barrier, including a plurality of vertical interval arrangement's I -shaped stand, sound barrier mechanism, limiting mechanism and base, the four edge of sound barrier mechanism all vertically open long hole, sound barrier mechanism is obliquely arranged between two adjacent I -shaped stand, and is connected through limiting mechanism and long hole cooperation with I -shaped stand limiting, I -shaped stand is located on base. The utility model can flexibly adjust inclination angle to adapt to different noise propagation path, realizes full -band noise reduction through multilayer composite structure, and installation maintenance is convenient, and structural stability is strong, is applicable to the noise management of multiple scene such as highway, railway, industrial park.

Description

Technical Field

[0001] This utility model belongs to the field of sound barrier technology, specifically relating to a variable tilt angle noise reduction ECP sound barrier. Background Technology

[0002] With the acceleration of urbanization and the rapid development of the transportation industry, noise pollution from highways, railways, urban rail transit, and industrial parks has become a key issue affecting the living environment. According to the "China Environmental Noise Pollution Prevention and Control Report," traffic noise accounts for more than 65% of noise sources in urban areas, with daytime noise levels on some road sections reaching 75-85 dB, far exceeding the limits specified in the "Environmental Noise Quality Standard" (GB3096-2008). Long-term exposure can cause health problems such as hearing loss and sleep disorders, while also interfering with the precise operations of surrounding industrial production. Therefore, the development of efficient noise control equipment has become a key focus of the industry.

[0003] As a core device for blocking noise propagation, sound barriers are widely used between major traffic arteries and sensitive areas due to their advantages of convenient installation and controllable cost. Currently, the mainstream sound barriers on the market are mainly divided into three categories: metal sound barriers, ordinary concrete sound barriers, and traditional composite sound barriers. However, all of them have significant technical limitations. For example, in terms of tilt angle adaptability, existing sound barriers mostly use fixed straight panels or pre-set angled structures, which cannot dynamically adjust the angle according to the distribution of noise sources and terrain conditions. For instance, at highway curves, fixed-angle barriers easily form noise diffraction zones, with diffracted noise attenuation of only 10-15 dB, far lower than on straight sections. Due to the special propagation direction of low-frequency vibration noise generated by trains on railway trunk lines, fixed barriers cannot effectively reflect or absorb it, resulting in noise levels exceeding the standard by 10-15 dB within 20 meters on both sides of the track. Some barriers that attempt to achieve angle adjustment use welded adjustment mechanisms, which are not only cumbersome to operate but also have poor stability after adjustment, easily leading to structural loosening under winds of force 8 or higher, requiring frequent maintenance.

[0004] In terms of sound absorption and insulation performance, traditional sound barriers have limitations in frequency bands: although metal sound barriers can achieve a sound absorption rate of 0.6-0.7 for high-frequency noise of 1-2kHz, their ability to attenuate low-frequency noise is insufficient, and metal materials are susceptible to corrosion, with a 5-year corrosion rate of up to 40% in coastal areas, resulting in high maintenance costs; ordinary concrete sound barriers have good sound insulation performance, but weak sound absorption capacity and heavy weight, requiring high foundation bearing capacity, making them unsuitable for soft soil foundation areas; although traditional composite sound barriers such as those made of gypsum board and glass wool take into account both sound absorption and insulation, glass wool is prone to moisture damage and failure, and there is no effective vibration suppression design. When a train passes by, the secondary noise generated by the barrier's own vibration can reach 45dB, forming a new noise source;

[0005] In terms of structural stability and installation and maintenance, existing sound barriers mostly adopt an integral design or a simple splicing structure: integral barriers are difficult to transport, and special transportation equipment is required when the length of a single piece exceeds 6m, resulting in a long construction period; simple splicing barriers lack flexible limiting structures, and during long-term use, the material expands and contracts due to temperature changes, which can easily cause gaps and increase noise leakage. At the same time, the sound absorption and insulation components of existing barriers mostly use glue bonding or non-removable designs, and the whole structure needs to be replaced when there is partial damage.

[0006] In addition, existing products also have shortcomings in terms of material durability and scene adaptability. Metal barriers have poor resistance to freeze-thaw cycles, and ordinary concrete barriers have weak impact resistance, making it difficult to meet the needs of multiple environments. Sensitive areas such as the perimeter of residential communities need to balance noise reduction and lighting, but traditional barriers either have low light transmittance or the light-transmitting panels are disconnected from the sound-absorbing and sound-insulating structures, resulting in local noise exceeding the standard.

[0007] In summary, existing sound barriers have comprehensive shortcomings in terms of dynamic tilt adjustment, full-frequency noise reduction, structural stability, material durability, and ease of installation and maintenance. They cannot meet the needs of efficient, long-term, and low-cost noise control in complex scenarios. Therefore, developing a sound barrier that can flexibly adjust its tilt angle, absorb and insulate sound across the entire frequency range, is highly durable, and easy to maintain has become the key to solving the current problem of noise pollution control.

[0008] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0009] This invention provides a variable tilt angle noise reduction ECP sound barrier, which aims to solve the technical problems mentioned in the background art.

[0010] To achieve the above objectives, the technical solution of this utility model is as follows:

[0011] A variable tilt angle noise reduction ECP sound barrier includes multiple vertically spaced I-shaped columns, a sound barrier mechanism, a limiting mechanism, and a base.

[0012] The sound barrier mechanism has vertically protruding elongated holes on all four edges. The sound barrier mechanism is inclinedly arranged between two adjacent I-shaped columns and is limited and connected to the I-shaped columns through the limiting mechanism and the elongated holes. The I-shaped columns are located on the base.

[0013] Preferably, the limiting mechanism includes a fastening bolt and two fastening nuts.

[0014] The fastening bolt is laterally connected to the mounting groove of the I-shaped column. Two fastening nuts are threaded onto the fastening bolt within the mounting groove. The elongated hole is located between the two fastening nuts and is limited to the I-shaped column through the two fastening nuts.

[0015] Preferably, the limiting mechanism further includes rubber washers, and the rubber washers are fitted on both sides of the elongated hole on the fastening bolt.

[0016] Preferably, the sound barrier mechanism includes an inlaid frame, a sound-absorbing panel, sound-absorbing cotton, and a sound-insulating back panel.

[0017] The four edges of the inlay frame are vertically provided with the elongated holes. The sound-absorbing panel, sound-absorbing cotton and sound-insulating back plate are arranged in sequence from the outside to the inside of the inlay frame and are connected to the inlay frame by fastening bolts.

[0018] Preferably, there are multiple sound barrier mechanisms, and the multiple sound barrier mechanisms are arranged vertically between two adjacent I-shaped columns.

[0019] Due to the adoption of the above technical solution, the beneficial effects of this utility model are as follows:

[0020] 1. This utility model provides a variable tilt angle noise reduction ECP sound barrier, which has a simple structure and lightweight design. Compared with traditional fixed angle sound barriers, this technology realizes the tilt angle adjustment of the sound barrier mechanism by setting elongated holes and a specially designed double nut limiting mechanism. The angle adjustment range can be set to 0°-15°. The angle can be dynamically adjusted according to the direction of the noise source, such as the noise of vehicles on highway curves or the low-frequency vibration noise of railway trains, effectively avoiding the problem of noise diffraction and improving the overall sound insulation and sound absorption effect of the barrier.

[0021] 2. This utility model's sound barrier structure adopts a three-layer composite structure of sound-absorbing panels, sound-absorbing cotton, and a sound-insulating back panel: the sound-absorbing panels (porous ECP material) have a sound absorption rate of 0.85 for high-frequency noise in the 1-8kHz range, effectively absorbing high-frequency noise such as tire friction and mechanical roar; the sound-absorbing cotton (a modified centrifugal glass wool material) has an attenuation rate of over 40% for mid-to-low-frequency noise in the 125-500Hz range, compensating for the insufficient low-frequency noise reduction of traditional metal barriers; the sound-insulating back panel (high-density ECP board and damping coating) has a sound insulation of ≥45dB, which can block the propagation of residual sound waves and suppress the vibration of the barrier itself, avoiding secondary noise. The overall structure provides relatively stable noise reduction across the entire frequency band.

[0022] 3. The rubber gasket in the limiting mechanism of this utility model can achieve flexible limiting, avoid material wear caused by rigid friction between the sound barrier mechanism and the fastening bolt, and extend the service life of the component. On the other hand, it can buffer wind load and vibration load, so that the barrier can maintain structural stability in the environment of strong wind or vehicle vibration, and its wind load resistance is improved compared with the traditional welded structure. Attached Figure Description

[0023] Figure 1 This is the front view of the present invention;

[0024] Figure 2 This is a top view of the present invention;

[0025] Figure 3 This is the left view of the present invention;

[0026] Figure 4 for Figure 1 Enlarged view of point A;

[0027] Figure 5 for Figure 1 Enlarged view of point B;

[0028] Figure 6 for Figure 2 Enlarged view of point C;

[0029] Figure 7 for Figure 3 Enlarged diagram of point D;

[0030] Figure 8 This is a schematic diagram of the sound barrier mechanism of this utility model.

[0031] The symbols of the main components in the diagram are explained below:

[0032] 1. I-shaped column; 2. Sound barrier mechanism; 21. Inlaid frame; 211. Long hole; 22. Sound-absorbing panel; 23. Sound-absorbing cotton; 24. Sound insulation back panel; 3. Limiting mechanism; 31. Fastening bolt one; 32. Fastening nut; 33. Rubber washer; 4. Base; 5. Fastening bolt two. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] Example

[0035] like Figures 1 to 8 As shown, a variable tilt angle noise reduction ECP sound barrier includes multiple vertically spaced I-shaped columns 1, a sound barrier mechanism 2, a limiting mechanism 3, and a base 4. Each of the four edges of the sound barrier mechanism 2 has a vertically opened elongated hole 211. The sound barrier mechanism 2 is inclined between two adjacent I-shaped columns 1 and is limited and connected to the I-shaped columns 1 through the cooperation of the limiting mechanism 3 and the elongated hole 211. The I-shaped columns 1 are set on the base 4.

[0036] Compared with traditional fixed-angle sound barriers, this invention uses an elongated hole 211 and a specially designed limiting mechanism 3 to adjust the tilt angle of the sound barrier mechanism 2. The angle adjustment range can be set to 0°-15°. The angle can be dynamically adjusted according to the direction of the noise source, such as the noise of vehicles on a highway curve or the low-frequency vibration noise of a railway train, effectively avoiding the problem of noise diffraction and improving the overall sound insulation and sound absorption effect of the barrier.

[0037] In this embodiment, please refer to Figure 3 , Figure 6 and Figure 7 The limiting mechanism 3 includes a fastening bolt 31 and two fastening nuts 32. The fastening bolt 31 is horizontally connected to the mounting groove of the I-shaped column 1. Two fastening nuts 32 are threaded onto the fastening bolt 31 within the mounting groove. An elongated hole 211 is located between the two fastening nuts 32 and is connected to the I-shaped column 1 for limiting via the two fastening nuts 32. Specifically, when using the limiting mechanism 3 to adjust the tilt angle and limit the sound barrier mechanism 2, first loosen the two fastening nuts 32 on the fastening bolt 31. The two fastening nuts 32 are located on both sides of the elongated hole 211. At this time, the sound barrier mechanism 2 can slide up and down along the elongated hole 211. If it is necessary to increase the tilt angle towards the noise source, the side of the sound barrier mechanism 2 closer to the noise source can be slid downwards, and the side farther away can be slid upwards. If it is necessary to decrease the tilt angle or tilt in the opposite direction, the operation is reversed. After adjusting to the target angle, tighten the fastening nuts 32 on both sides. The clamping force between the fastening nuts 32 and the sound barrier mechanism 2 achieves the limiting and fixing, making the operation convenient and reliable.

[0038] Specifically, the limiting mechanism 3 also includes rubber washers 33, which are fitted on both sides of the elongated hole 211 and on the fastening bolts 31. The rubber washers 33 serve two purposes: firstly, to achieve flexible limiting and avoid material wear caused by rigid friction between the sound barrier mechanism 2 and the fastening bolts 31, thus extending the service life of the components; secondly, to buffer wind loads and vibration loads, so that the barrier remains structurally stable under strong winds or vehicle vibrations, and its wind load resistance is improved compared to traditional welded structures.

[0039] In this embodiment, please refer to Figure 8The sound barrier mechanism 2 includes an inlaid frame 21, a sound-absorbing panel 22, sound-absorbing cotton 23, and a sound-insulating back panel 24. The inlaid frame 21 has vertically spaced elongated holes 211 along its four edges. The sound-absorbing panel 22, sound-absorbing cotton 23, and sound-insulating back panel 24 are sequentially arranged within the inlaid frame 21 from the outside in and connected to the frame 21 by fastening bolts 25. The sound-absorbing panel 22 uses porous ECP material, achieving a sound absorption rate of 0.85 for high-frequency noise in the 1-8kHz range, effectively absorbing high-frequency noise such as tire friction and mechanical roar. The sound-absorbing cotton 23 uses modified centrifugal glass wool material, achieving an attenuation rate of over 40% for mid-to-low frequency noise in the 125-500Hz range, compensating for the insufficient low-frequency noise reduction of traditional metal barriers. The sound-insulating back panel 24 uses a high-density ECP board and a damping coating, with a sound insulation value ≥45dB, blocking the propagation of residual sound waves and suppressing the barrier's own vibration, thus avoiding secondary noise. The overall structure provides relatively stable noise reduction across the entire frequency band.

[0040] In this embodiment, multiple sound barrier mechanisms 2 are provided, and multiple sound barrier mechanisms 2 are arranged vertically between two adjacent I-shaped columns 1. The number of sound barrier mechanisms 2 can be selected according to the actual situation. Each sound barrier mechanism 2 is set as an integral unit, and multiple sound barrier units are arranged vertically and connected vertically to form a continuous barrier. This design not only improves installation efficiency, but also flexibly adapts to complex terrain and reduces space occupation.

[0041] The working principle of this utility model:

[0042] This invention provides a variable tilt angle noise reduction ECP sound barrier. During installation, the sound barrier mechanism 2 is fitted onto the fastening bolts 31 via elongated holes 211 along its four edges. The vertical length of the elongated holes 211 provides travel space for tilt angle adjustment. When the tilt angle needs adjustment, first loosen the two fastening nuts 32 on the fastening bolts 31. The sound barrier mechanism 2 can then slide up and down along the elongated holes 211. To increase the tilt angle towards the noise source, slide the sound barrier mechanism 2 downwards on the side closer to the noise source and upwards on the side farther away. To decrease the tilt angle or tilt in the opposite direction, reverse the operation. After adjusting to the target angle, tighten the fastening nuts 32 on both sides. The clamping force between the fastening nuts 32 and the sound barrier mechanism 2 achieves limiting and fixing. Simultaneously, the rubber washers 33 on both sides of the elongated holes 211 deform during clamping, filling the gap to prevent loosening and buffering vibration and friction, protecting the edges of the sound barrier mechanism from wear.

[0043] When noise propagates to the sound barrier mechanism 2, it first contacts the outer sound-absorbing panel 22. The micropores on the surface of the sound-absorbing panel 22 form acoustic impedance matching, allowing some high-frequency noise to enter the interior of the micropores. Energy is dissipated through air molecule friction and pore wall reflection, achieving initial noise reduction. The sound waves that are not completely absorbed penetrate the sound-absorbing panel 22 and enter the middle layer of sound-absorbing cotton 23. The porous structure inside the sound-absorbing cotton 23 further extends the sound wave propagation path. Through fiber vibration and air viscosity resistance, the energy of mid- and low-frequency noise is converted into heat energy and consumed, completing secondary noise reduction. The remaining small amount of sound waves reach the inner sound insulation back panel 24. The high-density ECP board blocks sound wave transmission due to its high surface density, and the damping coating on the inner side of the back panel suppresses the vibration of the barrier under sound wave excitation, avoiding secondary radiation noise, and ultimately achieving effective control of noise across the entire frequency band.

[0044] The above description is a detailed description of the preferred embodiments of the present utility model. However, the embodiments are not intended to limit the scope of the patent application of the present utility model. All equivalent changes or modifications made under the technical spirit of the present utility model should fall within the patent scope covered by the present utility model.

Claims

1. A variable tilt angle noise reduction ECP sound barrier, characterized in that, It includes multiple vertically spaced I-shaped columns (1), a sound barrier mechanism (2), a limiting mechanism (3), and a base (4). The sound barrier mechanism (2) has vertically opened elongated holes (211) on all four sides. The sound barrier mechanism (2) is inclined between two adjacent I-shaped columns (1) and is connected to the I-shaped columns (1) through the limiting mechanism (3) and the elongated holes (211). The I-shaped columns (1) are located on the base (4).

2. The variable tilt angle noise reduction ECP sound barrier as described in claim 1, characterized in that, The limiting mechanism (3) includes a fastening bolt (31) and two fastening nuts (32). The fastening bolt (31) is laterally connected to the mounting groove of the I-shaped column (1). Two fastening nuts (32) are threaded onto the fastening bolt (31) located in the mounting groove. The elongated hole (211) is located between the two fastening nuts (32) and is limited to the I-shaped column (1) through the two fastening nuts (32).

3. The variable tilt angle noise reduction ECP sound barrier as described in claim 2, characterized in that, The limiting mechanism (3) also includes rubber washers (33), which are fitted on both sides of the elongated hole (211) on the fastening bolt (31).

4. A variable tilt angle noise reduction ECP sound barrier as described in claim 2, characterized in that, The sound barrier mechanism (2) includes an inlaid frame (21), a sound-absorbing panel (22), sound-absorbing cotton (23), and a sound-insulating back panel (24). The four edges of the inlay frame (21) are vertically provided with the elongated holes (211). The sound-absorbing panel (22), sound-absorbing cotton (23) and sound-insulating back plate (24) are arranged in the inlay frame (21) from the outside to the inside, and are connected to the inlay frame (21) by fastening bolts (5).

5. A variable tilt angle noise reduction ECP sound barrier as described in claim 1, characterized in that, The sound barrier mechanism (2) is provided in multiple ways, and the multiple sound barrier mechanisms (2) are arranged vertically between two adjacent I-shaped columns (1).

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