Road bridge noise reduction device

Abstract

The application discloses a road bridge noise reduction device, which comprises a base, a frame body, at least one pushing mechanism and a sound-absorbing plate. The base is provided with a limiting groove and a containing cavity. The limiting groove extends along the length direction of the base and is communicated with the containing cavity. The frame body comprises a frame, a supporting column and a mounting plate. The frame is mounted on the base and is supported by the base. The frame has a top plate. The supporting column is mounted on the frame and extends along the gravity direction. The two ends of the supporting column are connected with the top plate and the base respectively. The mounting plate is connected with the supporting column and is inserted into the limiting groove. The top of the mounting plate has a certain gap with the top plate. The pushing mechanism is arranged in the containing cavity and is in abutment with the mounting plate. The pushing mechanism is used for pushing the mounting plate out of the limiting groove, so that the mounting plate can rotate around the axis of the supporting column. The sound-absorbing plate is mounted on the mounting plate and is supported by the mounting plate. The safety of the cleaning personnel is ensured, and the influence on the traffic is reduced.

Description

Technical Field

[0001] This invention belongs to the field of road ancillary facilities, and specifically relates to a road and bridge noise reduction device. Background Technology

[0002] With the acceleration of urbanization, traffic noise pollution has become increasingly serious, posing a major environmental problem affecting the quality of life of residents along roads. Noise barriers are often installed along roads and bridges to block and absorb noise. However, these fixed barriers are exposed to the outdoors for extended periods, and their roadside surfaces easily accumulate pollutants such as dust, oil, and lint kicked up by vehicles. This dirt not only severely affects the aesthetics of the barriers but also clogs the surface structure of porous sound-absorbing materials, leading to a significant decrease in their noise reduction performance. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a road and bridge noise reduction device.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A road and bridge noise reduction device, comprising: A base (1) is provided with a limiting groove (101) and a receiving cavity (102). The limiting groove (101) extends along the length direction of the base (1), and the receiving cavity (102) is disposed below the limiting groove (101) and communicates with the receiving cavity (102). The frame (2) includes a frame (201), a support column (202), and a mounting plate (203). The frame (201) is installed on the base (1) and supported by the base (1). The frame (201) has a top plate (211). The support column (202) is installed on the frame (201) and extends along the direction of gravity. The two ends of the support column (202) are respectively connected to the top plate (211) and the base (1). The mounting plate (203) is connected to the support column (202) and inserted into the limiting groove (101). The top of the mounting plate (203) has a certain gap with the top plate (211). At least one pushing mechanism (3) is provided in the accommodating cavity (102), the pushing mechanism (3) abuts against the mounting plate (203), the pushing mechanism (3) is used to push the mounting plate (203) out of the limiting groove (101) so that the mounting plate (203) can rotate around the axis of the support column (202); A sound-absorbing plate (4) is mounted on the mounting plate (203).

[0005] One end of the support column (202) is threaded to the top plate (211), the other end of the support column (202) abuts against the base (1), and the support column (202) is pivotally connected to the mounting plate (203) so that the mounting plate (203) rotates relative to the support column (202) about the axis of the support column (202).

[0006] The mounting plate (203) has a groove (213) at its insertion end. The groove (213) extends along the direction of gravity, and the opening (212) of the groove (213) faces the receiving cavity (102). The pushing mechanism (3) includes a motor (301), a lead screw (302), and a pusher (303). The motor (301) is installed in the accommodating cavity (102). The lead screw (302) is drivenly connected to the motor (301). The lead screw (302) extends along the depth direction of the groove (213) and abuts against the mounting plate (203). The pusher (303) is drivenly connected to the lead screw (302) and is located at the limiting position. Inside the groove (101), the push block (303) slides against the limiting groove (101) so that the push block (303) moves along the depth direction of the limiting groove (101) under the drive of the lead screw (302). The push block (303) abuts against the bottom of the mounting plate (203) so that the push block (303) drives the mounting plate (203) away from the receiving cavity (102) under the drive of the motor (301).

[0007] The base (1) has multiple positioning grooves (5) located on both sides of the limiting groove (101). The base (1) is equipped with a positioning element (6), which is installed in the positioning groove (5). The positioning element (6) includes a protrusion (601) and an elastic element (602). The two ends of the elastic element (602) are respectively connected to the bottom of the protrusion (601) and the positioning groove (5) so that the protrusion (601) can be pressed into the positioning groove (5) by the mounting plate (203). The positioning element (6) is used to align the mounting plate (203) with the limiting groove (101).

[0008] The mounting plate (203) has a sound-absorbing surface and a cleaning surface, which are arranged opposite to each other. Both the sound-absorbing surface and the cleaning surface are provided with multiple sound-absorbing plates (4), which are arranged in a linear sequence.

[0009] The mounting plate (203) is provided with multiple locking elements (9) and multiple screws (7). The silencing plate (4) is provided with multiple through holes (8). The through holes (8) penetrate the silencing plate (4) along the wall thickness direction. The multiple locking elements (9) correspond one-to-one with the multiple through holes (8) so that the multiple locking elements (9) are inserted into the through holes (8) corresponding to themselves. The multiple screws (7) are inserted into one of the through holes (8) and cooperate with one of the locking elements (9) to lock the silencing plate (4).

[0010] Each of the screws (7) is fitted with a first spring (10). One end of the first spring (10) is connected to the head of the screw (7), and the other end of the first spring (10) abuts against the muffler (4). The first spring (10) is used to buffer the vibration of the muffler (4) during operation.

[0011] The top of the mounting plate (203) has a groove (11), and the mounting plate (203) is connected to a sealing member (12). The sealing member (12) includes a second spring (1201) and a sealing plate (1202). The second spring (1201) is installed in the groove (11), and the two ends of the second spring (1201) are respectively connected to the mounting plate (203) and the sealing plate (1202). The sealing plate (1202) extends vertically and abuts against the top plate (211). The sealing member (12) is used to seal the gap between the mounting plate (203) and the top plate (211).

[0012] The top plate (211) is also equipped with an arc-shaped noise reduction plate (13) extending in the horizontal direction. The arc-shaped noise reduction plate (13) bends away from the road and bridge and the arc surface of the arc-shaped noise reduction plate (13) faces the road and bridge.

[0013] The base (1) is also provided with a plug-in interface (14) and a plug-in block (15), which are used to splice the road and bridge noise reduction device.

[0014] Compared with the prior art, the beneficial effects of the present invention are: This invention utilizes a mounting plate that rotates around the axis of a supporting column. When contaminants accumulate on the roadside surface of the noise-reducing panel and require cleaning, operators can directly rotate the mounting plate from a safe area on the bridge or road side. This rotates the noise-reducing panel synchronously to an easily accessible cleaning position, achieving efficient cleaning of the panel's surface. This process does not require traffic interruption or the use of high-altitude work equipment, effectively ensuring personnel safety. After cleaning, the mounting plate is rotated in the opposite direction to re-embed and fix it in the limiting groove, restoring the noise reduction device to its original working state. This design, through its rotatable structure, enables convenient and safe maintenance of the noise-reducing panel, ensuring its long-term stable noise reduction performance. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the road and bridge noise reduction device of the present invention; Figure 2 for Figure 1 Cross-sectional view; Figure 3 for Figure 2 The enlarged view shown is A. Figure 4 for Figure 2 The enlarged view shown is B. Figure 5 This is a structural schematic diagram of the road and bridge noise reduction device of the present invention, in which the sound-absorbing plate on one side is separated from the mounting plate; Figure 6 for Figure 5 Cross-sectional view; Figure 7 for Figure 6 The enlarged view shown is C. Figure 8 for Figure 6 The enlarged view shown is D. Figure 9 This is a schematic diagram of the road and bridge noise reduction device of the present invention, with the sound-absorbing plate structure omitted.

[0016] In the diagram: 1. Base; 101. Limiting groove; 102. Receiving cavity; 2. Frame; 201. Frame body; 211. Top plate; 212. Opening; 202. Support column; 203. Mounting plate; 213. Groove; 3. Pushing mechanism; 301. Motor; 302. Lead screw; 303. Push block; 4. Silencing plate; 5. Positioning groove; 6. Positioning component; 601. Protrusion; 602. Elastic component; 7. Screw; 8. Through hole; 9. Locking component; 10. First spring; 11. Slide groove; 12. Sealing component; 1201. Second spring; 1202. Sealing plate; 13. Arc-shaped noise reduction plate; 14. Insertion interface; 15. Insertion block. Detailed Implementation

[0017] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments.

[0018] Figure 1-9A noise reduction device for roads and bridges is shown, comprising: a base 1, wherein the base 1 is provided with a limiting groove 101 and a receiving cavity 102, the limiting groove 101 extending along the length direction of the base 1, and the receiving cavity 102 being disposed below the limiting groove 101 and communicating with the receiving cavity 102; and a frame 2, wherein the frame 2 includes a frame body 201, a support column 202, and a mounting plate 203, the frame body 201 being mounted on and supported by the base 1, the frame body 201 having a top plate 211 opening (212), the opening (212) extending radially through both sides of the frame body, and the support column 202 being mounted on the frame body 201. Extending along the direction of gravity, the support column 202 is connected at both ends to the top plate 211 and the base 1, respectively. The mounting plate 203 is connected to the support column 202 and inserted into the limiting groove 101. The top of the mounting plate 203 has a certain gap with the top plate 211. At least one pushing mechanism 3 is provided in the accommodating cavity 102. The pushing mechanism 3 abuts against the mounting plate 203 and is used to push the mounting plate 203 out of the limiting groove 101 so that the mounting plate 203 can rotate around the axis of the support column 202. A sound-absorbing plate 4 is installed on the mounting plate 203.

[0019] When pollutants accumulate on the roadside surface of the noise-reducing panel 4 and need cleaning, the jacking mechanism 3, located in the accommodating cavity 102 of the base 1, is activated. This mechanism pushes the mounting plate 203 upward out of the limiting groove 101, allowing the mounting plate 203 to rotate around the axis of the support column 202. Operators can then directly rotate the mounting plate 203 from a safe area on the bridge or road side, causing the noise-reducing panel 4 to rotate synchronously and move to an easily accessible cleaning position, thus achieving efficient cleaning of the surface contaminants on the noise-reducing panel 4. This process does not require interrupting traffic or using high-altitude work equipment, effectively ensuring personnel safety. After cleaning, the mounting plate 203 is rotated in the opposite direction to re-embed it into the limiting groove 101 and fix it, restoring the noise reduction device to its original working state. This design, through its rotatable structure, enables convenient and safe maintenance of the noise-reducing panel 4, ensuring its long-term stable noise reduction performance.

[0020] One end of the support column 202 is threadedly connected to the top plate 211, and the other end of the support column 202 abuts against the base 1. The support column 202 is pivotally connected to the mounting plate 203, allowing the mounting plate 203 to rotate relative to the support column 202 about its axis. The threaded connection between the top end of the support column 202 and the top plate 211 forms a robust suspension fulcrum, ensuring absolute stability of the rotation axis and providing important height adjustment functionality. After installation or long-term use, the height of the support column 202 can be finely adjusted by rotating it to compensate for any settlement or deformation that may occur in the base 1 or frame 201. This ensures that the mounting plate 203 and the limiting groove 101 can always fit together perfectly, maintaining the rigidity and stability of the entire device and preventing abnormal noises or performance degradation caused by dimensional deviations. The support column 202 and the mounting plate 203 are connected by a pivot, enabling low-friction and easy rotation of the mounting plate 203 around its axis. This design completely separates the rotational movement of the heavy sound-absorbing plate 4 from the fixed support function of the support column 202, making the rotational action exceptionally effortless and smooth. Operators do not need to overcome enormous frictional forces; only one person is required to easily complete the rotational cleaning operation, greatly improving the efficiency and convenience of maintenance.

[0021] Based on the limiting design of the support column 202 and the limiting groove 101 for the mounting plate 203, this structure ensures extremely high stability and reliability of the device under normal noise reduction operation. The support column 202, as the core load-bearing and rotation axis, has a robust vertical design that effectively resists strong wind loads and traffic vibrations, preventing the sound-absorbing plate 4 from swaying or shifting, thus ensuring structural safety for long-term use. The limiting groove 101 provides precise locking and positioning for the mounting plate 203, allowing it to fit tightly against the base 1 in the working state, forming a rigid, integrated structure. This limiting mechanism makes the reset operation after rotation cleaning simple, fast, and accurate. Operators do not need complex adjustments; they only need to push the mounting plate 203 back, allowing it to slide down along the limiting groove 101 to the predetermined position, automatically restoring its original optimal state, greatly improving maintenance efficiency and reducing operational difficulty and technical requirements.

[0022] The mounting plate 203 has a groove 213 at its insertion end, which extends along the direction of gravity and has an opening 212 facing the receiving cavity 102. The pushing mechanism 3 includes a motor 301, a lead screw 302, and a push block 303. The motor 301 is mounted in the receiving cavity 102, and the lead screw 302 is connected to the motor 301. The lead screw 302 extends along the depth direction of the groove 213 and abuts against the mounting plate. 203. The push block 303 is connected to the lead screw 302 and located within the limiting groove 101. The push block 303 slides against the limiting groove 101, allowing it to move along the depth direction of the limiting groove 101 under the drive of the lead screw 302. The push block 303 abuts against the bottom of the mounting plate 203, allowing it to move the mounting plate 203 away from the receiving cavity 102 under the drive of the motor 301. The limiting groove 101 provides a clear guiding path for the push block 303, ensuring that the pushing force is transmitted strictly in the vertical direction, effectively preventing the mounting plate 203 from tilting or jamming during lifting and lowering, and greatly improving the reliability of the operation. Motor 301 drives lead screw 302 to move push block 303 smoothly along limit groove 101. This not only enables remote electrical control operation, allowing personnel to completely avoid dangerous areas, but also ensures precise positioning and reliable holding of the lifting position through the self-locking characteristic of lead screw 302, avoiding the risk of the mounting plate 203 falling back due to its own weight. This makes the entire preparation process safe, labor-saving, and efficient, and is an important structure for achieving maintenance automation.

[0023] Based on the design of the jacking mechanism 3, this mechanism transforms the traditional "lifting upwards" action into a mechanical "pushing" action, solving the difficulties and risks faced by manually lifting the heavy muffler plate 4. Through a lead screw power source, the jacking mechanism 3 can smoothly and effortlessly lift the mounting plate 203 and the muffler plate 4 as a whole, separating them from the limiting groove 101 and placing them in a ready-to-rotate state. The entire process requires no significant physical exertion from the operator and avoids potential equipment damage caused by brute force. This design shifts the most labor-intensive step from working at height or near traffic to a mechanism pre-embedded in the accommodating cavity 102 of the base 1. Operators can remotely control the start-up from the ground or a safe area, and perform a simple rotation operation after the lifting is complete, greatly ensuring personnel safety and completely avoiding direct contact with high-altitude operations or high-speed traffic, achieving inherent safety. This not only significantly reduces operational risks and safety costs but also makes daily cleaning and maintenance feasible and convenient, allowing for regular maintenance to ensure long-term stable noise reduction performance.

[0024] The base 1 has multiple positioning grooves 5 located on both sides of the limiting groove 101. A positioning element 6 is installed on the base 1 within each positioning groove 5. The positioning element 6 includes a protrusion 601 and an elastic element 602. The two ends of the elastic element 602 are connected to the bottom of the protrusion 601 and the positioning groove 5, respectively, allowing the mounting plate 203 to press the protrusion 601 into the positioning groove 5. The positioning element 6 is used to align the mounting plate 203 with the limiting groove 101. The cooperation between the positioning grooves 5 and the elastic positioning element 6 improves the guiding accuracy and ease of operation when the mounting plate 203 is reset. When the rotating and cleaned mounting plate 203 falls back down, its bottom will first contact the protrusion 601 of the positioning element 6. Under the weight of the mounting plate 203 itself, the protrusion 601 is pressed into the positioning groove 5, compressing the elastic element 602 and providing a temporary, slidable guide slope for the mounting plate 203. This process automatically corrects minor angular or positional deviations between the mounting plate 203 and the base 1, ensuring rapid alignment with the limiting groove 101. Once aligned, the protrusion 601 quickly pops out under the restoring force of the elastic element 602, re-aggregating against the edge of the mounting plate 203, providing a clear indication of positioning and acting as a preliminary limit, thereby guiding the mounting plate 203 to finally and smoothly and accurately embed into the limiting groove 101 to complete locking. This design effectively avoids repeated adjustments, bumps, or jamming caused by misalignment, significantly reducing operational difficulty and time costs, minimizing wear on the structure, and ensuring the stability and sealing of the device connection after each reset. It is an important auxiliary guarantee for achieving efficient and reliable maintenance.

[0025] The mounting plate 203 has a sound-absorbing surface and a clean surface, which are arranged opposite to each other. Both the sound-absorbing and clean surfaces are equipped with multiple sound-absorbing plates 4, which are linearly distributed in sequence. When the performance of one side of the sound-absorbing surface deteriorates due to contamination, there is no need for tedious on-site cleaning. Operators simply need to rotate the mounting plate 203 180 degrees using a push-and-rotate mechanism to immediately switch the prepared clean surface (actually another set of clean sound-absorbing plates 4) to the roadside for operation. This instantly restores the barrier's optimal noise reduction effect, achieving seamless integration of noise reduction functions and completely avoiding the noise reduction gap that exists during traditional cleaning operations, ensuring that residents along the route are continuously free from noise disturbance. This design eliminates time-consuming cleaning steps such as high-pressure washing and wiping, greatly shortening maintenance time and further reducing potential traffic impact and operator safety risks. Furthermore, the replaced contaminated surfaces can be thoroughly and meticulously cleaned and maintained outside the system. Once their performance is restored, they can be used as spare surfaces for the next use. This not only extends the total service life of the muffler 4 but also ensures that the device always operates at optimal performance. The modular design of the muffler 4 makes transportation easier and reduces damage to the muffler 4 caused by vehicle vibration during transport.

[0026] The mounting plate 203 is equipped with multiple locking elements 9 and multiple screws 7. The muffler plate 4 has multiple through holes 8 that penetrate the muffler plate 4 along its wall thickness. Each locking element 9 corresponds to one of the through holes 8, allowing each locking element 9 to pass through its corresponding through hole 8. Each screw 7 passes through one of the through holes 8 and engages with one of the locking elements 9 to lock the muffler plate 4. When a muffler plate 4 is severely contaminated, damaged, or requires deep cleaning, maintenance personnel do not need to disassemble the entire mounting plate 203 module; they only need to loosen the corresponding screw 7 to remove the individual muffler plate 4 from the mounting plate 203 for operation. This greatly simplifies maintenance work, reducing the maintenance scope from the entire panel to a single muffler plate 4 unit, making replacement or off-site cleaning exceptionally flexible and time-saving, significantly reducing the time spent on each maintenance operation and the potential impact on traffic. Furthermore, this design provides stable and uniform mechanical locking. The cooperation of multiple locking parts 9 with through holes 8 provides precise positioning and reliable vertical support for the silencing plate 4, effectively preventing it from shaking or shifting during use; while the screws 7 provide strong horizontal locking force, ensuring that the silencing plate 4 and the mounting plate 203 fit tightly together to form a whole, jointly bearing wind load and vibration, avoiding secondary noise or structural damage caused by loose connections, and ensuring the long-term stability of the device and the durability of its noise reduction performance.

[0027] Each of the screws 7 is fitted with a first spring 10. One end of the first spring 10 is connected to the head of the screw 7, and the other end of the first spring 10 abuts against the sound-absorbing plate 4. The first spring 10 is used to buffer the vibration of the sound-absorbing plate 4 during operation. The introduction of the first spring 10 between the first spring 10 and the sound-absorbing plate 4 improves the vibration reduction and noise reduction performance and durability of the device. Its core beneficial effect is the efficient suppression and buffering of vibration. When the sound-absorbing plate 4 is subjected to continuous vibration caused by traffic flow or wind load, the first spring 10 absorbs and dissipates vibration energy through its elastic deformation, effectively blocking the transmission path of vibration through the screws 7 to the mounting plate 203 and the overall bracket, greatly reducing the secondary noise caused by structural resonance, and further optimizing the overall noise reduction effect of the barrier. At the same time, this design greatly enhances the reliability and safety of the connection. The continuous preload provided by the spring can automatically compensate for the loosening of the screws 7 that may be caused by vibration, temperature changes or material creep, always maintaining a stable pressing state on the sound-absorbing plate 4, preventing the connection from loosening, and eliminating the structural safety hazards caused by it. In addition, the reduction of vibration energy directly reduces fatigue wear and stress concentration at the connection between screw 7 and muffler 4, effectively extending the service life of all related components, especially the muffler 4 itself and the connecting threads, reducing the frequency of maintenance and replacement, and improving the economy and reliability of the entire life cycle.

[0028] The mounting plate 203 has a groove 11 at its top. A sealing element 12 is connected to the mounting plate 203. The sealing element 12 includes a second spring 1201 and a sealing plate 1202. The second spring 1201 is installed within the groove 11, and its two ends are connected to the mounting plate 203 and the sealing plate 1202, respectively. The sealing plate 1202 extends vertically and abuts against the top plate 211. The sealing element 12 is used to seal the gap between the mounting plate 203 and the top plate 211. To improve the noise reduction effect of the device without affecting the rotation of the mounting plate 203, this invention solves the protection and motion coordination problem caused by the gap between the mounting plate 203 and the top plate 211 through the spring-sealing element 12 structure within the groove 11, thus improving the device's sealing performance, durability, and operational reliability. Its core beneficial effect lies in dynamic sealing and continuous protection. Under the continuous pressure of the second spring 1201, the sealing plate 1202 remains tightly pressed against the bottom of the top plate 211, acting like a movable baffle to effectively seal the structural gap between the mounting plate 203 and the top plate 211. When the jacking mechanism 3 lifts the mounting plate 203, the mounting plate 203 moves upward relative to the top plate 211. At this time, the second spring 1201 is compressed, and the sealing plate 1202, while maintaining contact with the top plate 211, can slide smoothly relative to it. This ensures no mechanical interference during the movement process and continuously provides sealing protection throughout the entire lifting and rotation process, achieving a combination of static protection and dynamic movement, and improving the sound insulation effect of the noise reduction device.

[0029] The design of a certain gap between the top of the mounting plate 203 and the top plate 211 ensures the smoothness and safety of the pushing and rotating operations. When the pushing mechanism 3 is activated, the mounting plate 203 can be fully and unobstructedly lifted upwards, completely freeing it from the constraint of the limiting groove 101, thus creating the necessary conditions for subsequent free rotation. Without this gap, if the mounting plate 203 is forcibly rotated before being completely freed from the groove, it will experience severe rigid friction and collision with the limiting groove 101 or the base 1. This not only requires a great deal of operating force but also severely wears down the contact surface, leading to loss of positioning accuracy or even structural damage in the long run. The design of the sealing component 12 greatly reduces the frictional resistance during rotation, allowing operators to easily rotate the heavy muffler plate 4 module with less force, significantly reducing labor intensity and operational threshold. At the same time, this gap also plays a certain role in fault tolerance and buffering, allowing the mechanism to work smoothly even with minor deformation or slight misalignment, improving the reliability of the entire maintenance process and the durability of the equipment, fundamentally avoiding equipment failure caused by improper operation. Since the noise reduction device may vibrate during vehicle operation, this design allows the mounting plate 203 to make a small displacement in the vertical direction to play a role in shock absorption and further extend the service life of the device.

[0030] The top plate 211 is also equipped with an arc-shaped noise reduction plate 13 extending horizontally. The arc-shaped noise reduction plate 13 bends away from the road and bridge, and its curved surface faces the road and bridge. This design of the arc-shaped noise reduction plate 13 improves the overall noise reduction performance of the device, especially for controlling high-frequency noise. Its arc-shaped structure and the curved surface facing the road and bridge can more effectively guide and converge sound waves, consuming sound energy through multiple reflections and interference. The bent shape lengthens the sound wave propagation path, providing more space for noise absorption. Simultaneously, this design physically increases the effective height of the sound barrier, expands the sound shadow zone, and more effectively blocks noise from propagating to the outside and above the bridge, reducing noise diffraction. It has a significant effect on protecting the space above the bridge or residents of nearby high-rise buildings from noise interference.

[0031] The base 1 is also equipped with an interface 14 and a connector 15, which are used to assemble the road and bridge noise reduction device. This design, through a modular plug-in structure, greatly improves the scalability of the noise reduction device and the efficiency of on-site construction. The precise fit between the interface 14 and the connector 15 allows for the rapid and flexible longitudinal assembly of multiple independent noise reduction device units on-site, easily adapting to the sound insulation needs of bridges or roads of different lengths, achieving a balance between standardized production and personalized installation. This "building block" assembly method not only significantly reduces the difficulty of transportation and hoisting of the overall project but also significantly shortens the installation period and reduces interference with road traffic. Simultaneously, the robust interlocking structure effectively ensures the overall stability, continuity, and sealing of the assembled units, enabling the assembled long barrier to work collaboratively when facing wind loads and vibrations, as if formed as a single piece, ensuring uniform and reliable noise reduction effects, and providing an efficient and economical solution for large-scale, long-distance noise control projects.

[0032] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A noise reduction device for roads and bridges, characterized in that, include: A base (1) is provided with a limiting groove (101) and a receiving cavity (102). The limiting groove (101) extends along the length direction of the base (1), and the receiving cavity (102) is disposed below the limiting groove (101) and communicates with the receiving cavity (102). The frame (2) includes a frame (201), a support column (202), and a mounting plate (203). The frame (201) is installed on the base (1) and supported by the base (1). The frame (201) has a top plate (211). The support column (202) is installed on the frame (201) and extends along the direction of gravity. The two ends of the support column (202) are respectively connected to the top plate (211) and the base (1). The mounting plate (203) is connected to the support column (202) and inserted into the limiting groove (101). The top of the mounting plate (203) has a certain gap with the top plate (211). At least one pushing mechanism (3) is provided in the accommodating cavity (102), the pushing mechanism (3) abuts against the mounting plate (203), the pushing mechanism (3) is used to push the mounting plate (203) out of the limiting groove (101) so that the mounting plate (203) can rotate around the axis of the support column (202); A sound-absorbing plate (4) is mounted on the mounting plate (203).

2. The road and bridge noise reduction device according to claim 1, characterized in that, One end of the support column (202) is threaded to the top plate (211), the other end of the support column (202) abuts against the base (1), and the support column (202) is pivotally connected to the mounting plate (203) so that the mounting plate (203) rotates relative to the support column (202) about the axis of the support column (202).

3. The road and bridge noise reduction device according to claim 1, characterized in that, The mounting plate (203) has a groove (213) at its insertion end. The groove (213) extends along the direction of gravity, and the opening (212) of the groove (213) faces the receiving cavity (102). The pushing mechanism (3) includes a motor (301), a lead screw (302), and a pusher (303). The motor (301) is installed in the accommodating cavity (102). The lead screw (302) is drivenly connected to the motor (301). The lead screw (302) extends along the depth direction of the groove (213) and abuts against the mounting plate (203). The pusher (303) is drivenly connected to the lead screw (302) and is located at the limiting position. Inside the groove (101), the push block (303) slides against the limiting groove (101) so that the push block (303) moves along the depth direction of the limiting groove (101) under the drive of the lead screw (302). The push block (303) abuts against the bottom of the mounting plate (203) so that the push block (303) drives the mounting plate (203) away from the receiving cavity (102) under the drive of the motor (301).

4. The road and bridge noise reduction device according to claim 1, characterized in that, The base (1) has multiple positioning grooves (5) located on both sides of the limiting groove (101). The base (1) is equipped with a positioning element (6), which is installed in the positioning groove (5). The positioning element (6) includes a protrusion (601) and an elastic element (602). The two ends of the elastic element (602) are respectively connected to the bottom of the protrusion (601) and the positioning groove (5) so that the protrusion (601) can be pressed into the positioning groove (5) by the mounting plate (203). The positioning element (6) is used to align the mounting plate (203) with the limiting groove (101).

5. The road and bridge noise reduction device according to claim 1, characterized in that, The mounting plate (203) has a sound-absorbing surface and a cleaning surface, which are arranged opposite to each other. Both the sound-absorbing surface and the cleaning surface are provided with multiple sound-absorbing plates (4), which are arranged in a linear sequence.

6. A road and bridge noise reduction device according to claim 1, characterized in that, The mounting plate (203) is provided with multiple locking elements (9) and multiple screws (7). The silencing plate (4) is provided with multiple through holes (8). The through holes (8) penetrate the silencing plate (4) along the wall thickness direction. The multiple locking elements (9) correspond one-to-one with the multiple through holes (8) so that the multiple locking elements (9) are inserted into the through holes (8) corresponding to themselves. The multiple screws (7) are inserted into one of the through holes (8) and cooperate with one of the locking elements (9) to lock the silencing plate (4).

7. A road and bridge noise reduction device according to claim 6, characterized in that, Each of the screws (7) is fitted with a first spring (10). One end of the first spring (10) is connected to the head of the screw (7), and the other end of the first spring (10) abuts against the muffler (4). The first spring (10) is used to buffer the vibration of the muffler (4) during operation.

8. The road and bridge noise reduction device according to claim 1, characterized in that, The top of the mounting plate (203) has a groove (11), and the mounting plate (203) is connected to a sealing member (12). The sealing member (12) includes a second spring (1201) and a sealing plate (1202). The second spring (1201) is installed in the groove (11), and the two ends of the second spring (1201) are respectively connected to the mounting plate (203) and the sealing plate (1202). The sealing plate (1202) extends vertically and abuts against the top plate (211). The sealing member (12) is used to seal the gap between the mounting plate (203) and the top plate (211).

9. The road and bridge noise reduction device according to claim 1, characterized in that, The top plate (211) is also equipped with an arc-shaped noise reduction plate (13) extending in the horizontal direction. The arc-shaped noise reduction plate (13) bends away from the road and bridge and the arc surface of the arc-shaped noise reduction plate (13) faces the road and bridge.

10. The road and bridge noise reduction device according to claim 1, characterized in that, The base (1) is also provided with a plug-in interface (14) and a plug-in block (15), which are used to splice the road and bridge noise reduction device.

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