Noise reduction devices for road and bridge engineering

Abstract

This invention relates to the field of road and bridge engineering technology, and proposes a noise reduction device for road and bridge engineering, including a movable base with multiple casters mounted on its bottom; multiple stabilizing counterweights; multiple scissor-type synchronous lifting mechanisms mounted on the movable base; a sound barrier body, comprising a main sound barrier panel and a secondary sound barrier panel, which are slidably fitted together; both the main and secondary sound barrier panels include a splicing frame and multiple noise reduction units; the secondary sound barrier panel is connected to a multi-level limiting component; a top noise reflector panel mounted on top of the secondary sound barrier panel; multiple sound barrier connectors; and multiple telescopic bracing structures, each including a sliding telescopic component rotatably mounted on the secondary sound barrier panel. This invention facilitates adjustment of the working height of the noise reduction device and allows for easy relocation of the device as the road and bridge engineering progresses.

Description

Technical Field

[0001] This invention relates to the field of road and bridge engineering technology, and more specifically to a noise reduction device for road and bridge engineering. Background Technology

[0002] During the construction of road and bridge projects, welding, installation, pouring, transportation, and hoisting are required, which generate a lot of noise. If noise reduction measures are not taken, the long construction period of road and bridge projects will have a huge impact on the surrounding production and life. Therefore, noise reduction devices need to be used to reduce construction noise during road and bridge construction.

[0003] Currently, sound barriers are commonly used as noise reduction devices in road and bridge engineering. However, there are certain problems with their practical application. For example, the dimensions of existing noise reduction devices are relatively fixed, specifically in terms of vertical height. Due to the different structures of roads and bridges, the height of the noise generated during construction varies, requiring the use of sound barriers of different heights for noise reduction. Furthermore, existing noise reduction devices are often difficult to dismantle once fixed in a specific location. During the construction of road and bridge projects, the construction location, i.e., the noise-generating location, is constantly changing along with the construction machinery. When noise reduction is needed for subsequent construction, new noise reduction devices need to be installed at the new construction location, leaving the original devices in their original positions where no noise is generated, resulting in idle devices and increased unnecessary construction costs. Additionally, the dismantling process of existing noise reduction devices is cumbersome, and removing old devices to install them at new construction locations also wastes a significant amount of time. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a noise reduction device for road and bridge engineering, thereby solving the problems mentioned in the background art, such as the inconvenience of adjusting the working height of the noise reduction device and the inconvenience of moving the noise reduction device's position as the road and bridge engineering progresses.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the present invention provides the following technical solution: a noise reduction device for road and bridge engineering, comprising:

[0008] A movable base, the bottom of which is equipped with multiple casters;

[0009] Multiple stabilizing counterweights are slidably mounted on the bottom of the movable base, and the movable base is equipped with multiple scissor-type synchronous lifting mechanisms for driving the stabilizing counterweights to rise and fall.

[0010] The main body of the sound barrier includes a main sound insulation panel and a secondary sound insulation panel. The secondary sound insulation panel and the main sound insulation panel are in sliding fit. Both the main sound insulation panel and the secondary sound insulation panel include a splicing frame and multiple noise reduction units. The noise reduction units are installed inside the splicing frame. The secondary sound insulation panel is connected to a multi-level limiting component for limiting the position of the secondary sound insulation panel.

[0011] A top noise reflector, which is mounted on top of the secondary sound insulation panel;

[0012] Multiple sound barrier connectors are rotatably mounted on the main sound barrier panel for connecting two adjacent sound barrier bodies.

[0013] Multiple telescopic bracing structures, each telescopic bracing structure including a sliding telescopic component, the sliding telescopic component being rotatably mounted on the secondary sound insulation plate, and a support base being rotatably connected to the end of the sliding telescopic component away from the secondary sound insulation plate;

[0014] Multiple ground stakes are provided, and multiple fixing holes are provided on both the movable base and the support base. The multiple ground stakes are respectively set inside the corresponding fixing holes for locking the telescopic brace mechanism and the movable base.

[0015] To drive the counterweight to rise and fall, thereby fixing or moving the noise reduction device used in road and bridge engineering, the scissor-type synchronous lifting mechanism further includes two sets of scissor structures. An installation cavity is provided on the movable base. The top of the scissor structure and the inner top wall of the installation cavity are in sliding fit. Lifting connecting frames are rotatably connected to the bottoms of the two sets of scissor structures. The stabilizing counterweight is installed at the bottom of the corresponding lifting connecting frame. A bidirectional synchronous adjustment assembly for driving the extension and retraction of the two sets of scissor structures is connected between them. The bidirectional synchronous adjustment assembly includes a telescopic rod, a rotating seat, a bidirectional screw, and two threaded seats. The rotating seat is installed inside the installation cavity via the telescopic rod. The bidirectional screw is rotatably installed on the rotating seat. The two threaded seats are threadedly connected to the two threaded sections of the bidirectional screw, and the two threaded seats are rotatably connected to both sides of the scissor structure.

[0016] To further achieve the sound insulation function of the noise reduction unit, the noise reduction unit includes a mounting frame, a sound-absorbing part, and a sound-insulating part. Multiple mounting frames are fixedly installed inside the splicing frame, and the sound-absorbing part and the sound-insulating part are both installed inside the mounting frame.

[0017] The sound-absorbing part includes a protective plate and a plurality of sound-absorbing perforated plates. Both the protective plate and the sound-absorbing perforated plates are installed inside the mounting frame, and the protective plate is located on the outside.

[0018] The sound insulation section includes multiple tempered glass panes, with sound-insulating damping adhesive placed between adjacent tempered glass panes.

[0019] To achieve the limiting of the secondary sound insulation panel, based on the aforementioned scheme, the multi-level limiting assembly includes a limiting connecting plate, multiple equidistant limiting rods, and multiple fixing bolts. The equidistant limiting rods are connected to the limiting connecting plate, and the multiple equidistant limiting rods are equidistantly arranged on the limiting connecting plate. The main sound insulation panel has multiple limiting holes equidistantly opened to match the equidistant limiting rods. The limiting connecting plate is detachably connected to the secondary sound insulation panel through multiple fixing bolts.

[0020] To splice two adjacent sound barrier bodies, based on the aforementioned solution, the sound barrier connector includes a connecting plate and connecting bolts. The connecting plate is rotatably installed on one side of the main sound barrier away from the secondary sound barrier. The connecting plate has connecting holes, and the connecting bolts are disposed inside the connecting holes. The other side of the main sound barrier has multiple connecting screw holes that match the connecting bolts.

[0021] To enable the sliding telescopic assembly to extend and retract, and to adjust the length of the telescopic brace structure, the sliding telescopic assembly includes a rotating plate, a sliding seat, and a sliding rod. The rotating plate is rotatably connected to the secondary sound insulation plate via a hinged seat. The sliding seat and the rotating plate are in sliding engagement. The sliding seat is threaded with a locking screw. The sliding rod and the sliding seat are fixedly connected. The support seat and the sliding rod are rotatably connected.

[0022] To achieve a sliding fit between the secondary sound insulation panel and the main sound insulation panel, a number of sliders are fixedly connected to one end of the secondary sound insulation panel near the main sound insulation panel, and a number of grooves matching the sliders are provided on the main sound insulation panel.

[0023] (III) Beneficial Effects

[0024] Compared with known public technologies, the present invention provides a noise reduction device for road and bridge engineering, which has the following beneficial effects:

[0025] 1. In this invention, noise reduction is achieved at the construction site of road and bridge engineering through the main body of the sound barrier. The secondary sound barrier can be raised and lowered by the sliding cooperation between the secondary sound barrier and the main sound barrier, thereby adjusting the height of the main body of the sound barrier. The position of the secondary sound barrier is fixed by a multi-level limiting component. Multiple main bodies of the sound barrier are connected by sound barrier connectors, which can adapt to noise reduction for different noise ranges. Compared with the above-mentioned prior art, this solution facilitates the adjustment of the working height of the noise reduction device and the sound insulation range is adjustable.

[0026] 2. In this invention, the noise reduction device used in road and bridge engineering can be moved relatively easily by the movable wheels. The scissor-type synchronous lifting mechanism drives the stabilizing counterweight to rise and fall. The descent of the stabilizing counterweight can support and limit the noise reduction device used in road and bridge engineering, ensuring its stability. The rise of the stabilizing counterweight can make the movable wheels contact the ground and rotate. The telescopic bracing structure can support the main body of the sound barrier. The movable base and the telescopic bracing structure can be fixed by ground nails. Compared with the above-mentioned prior art, this solution facilitates the movement of the noise reduction device used in road and bridge engineering, allowing it to move with the progress of road and bridge engineering. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0028] Figure 1 This is a three-dimensional structural diagram of the splicing of multiple noise reduction devices of the present invention;

[0029] Figure 2 For the present invention Figure 1 A magnified schematic diagram of the local structure at point A;

[0030] Figure 3 This is a three-dimensional structural diagram of a single noise reduction device of the present invention;

[0031] Figure 4 For the present invention Figure 3 A magnified schematic diagram of the local structure at point B;

[0032] Figure 5 This is a partial cross-sectional three-dimensional structural schematic diagram of the movable base, stabilizing counterweight, ground nails and moving wheels of the present invention.

[0033] Figure 6 This is a three-dimensional structural diagram of the scissor-type synchronous lifting mechanism and the stabilizing counterweight of the present invention.

[0034] Figure 7 This is a three-dimensional structural diagram showing a partial sectional view of the fit between the limiting connecting plate, the equidistant limiting rod, and the splicing frame of the present invention.

[0035] Figure 8 For the present invention Figure 7 A magnified schematic diagram of the local structure at point C;

[0036] Figure 9 This is a three-dimensional structural diagram of the decomposed noise reduction unit in this invention.

[0037] The labels in the diagram represent:

[0038] 1. Movable base; 2. Stabilizing counterweight; 3. Top noise reflector; 4. Ground stakes; 5. Casters;

[0039] 100. Scissor-type synchronous lifting mechanism; 101. Scissor structure; 102. Slide block; 103. Lifting connecting frame;

[0040] 200. Bidirectional synchronous adjustment assembly; 201. Telescopic rod; 202. Rotary seat; 203. Bidirectional screw; 204. Threaded seat; 205. Drive rotating block;

[0041] 300. Main body of the sound barrier; 301. Main sound insulation panel; 302. Secondary sound insulation panel; 303. Sliding block; 304. Splicing frame;

[0042] 400. Multi-level limit assembly; 401. Limit connecting plate; 402. Equidistant limit rod;

[0043] 500, Noise Reduction Unit; 501, Mounting Frame;

[0044] 600. Sound-absorbing section; 601. Protective panel; 602. Sound-absorbing perforated panel;

[0045] 700. Sound insulation section; 701. Tempered glass; 702. Sound insulation damping adhesive;

[0046] 800. Telescopic diagonal brace structure; 801. Support base;

[0047] 900. Sliding telescopic assembly; 901. Rotating plate; 902. Sliding seat; 903. Sliding rod; 904. Limiting seat;

[0048] 1000, Sound barrier connector; 1001, Connecting plate; 1002, Connecting bolt. Detailed Implementation

[0049] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0050] Example

[0051] Please see Figures 1 to 9 A noise reduction device for road and bridge engineering, comprising a movable base 1, multiple stable counterweights 2, a sound barrier body 300, a top noise reflector 3, multiple sound barrier connectors 1000, multiple telescopic bracing structures 800, and multiple ground nails 4.

[0052] Please see Figure 5 The bottom of the movable base 1 has multiple movable cavities, and movable wheels 5 are rotatably installed inside the movable cavities. The bottom of the movable wheels 5 is lower than the bottom of the movable base 1. The noise reduction device used for road and bridge engineering can be moved relatively easily by rotating the movable wheels 5.

[0053] Please see Figure 4 and Figure 6The stabilizing counterweight 2 is slidably mounted on the bottom of the movable base 1. The movable base 1 is equipped with multiple scissor-type synchronous lifting mechanisms 100 for driving the stabilizing counterweight 2 to rise and fall. Each scissor-type synchronous lifting mechanism 100 includes two sets of scissor structures 101. The movable base 1 has an installation cavity, and two slide blocks 102 are fixedly connected to the inner top wall of the installation cavity. Two sliding shafts are rotatably connected to the top of each scissor structure 101. Sliding grooves are provided on each slide block 102, and the sliding shafts achieve sliding engagement between the scissor structure 101 and the slide block 102 through the sliding grooves. A lifting shaft is rotatably connected to the bottom of each scissor structure 101, and a lifting connecting frame 103 is fixedly connected between the two lifting shafts. The stabilizing counterweight 2 is mounted on the bottom of the corresponding lifting connecting frame 103. The lifting connecting frame 103 and the movable base 1 are in sliding engagement. The two sets of scissor structures 101 are connected by a... A bidirectional synchronous adjustment assembly 200 is provided for driving the extension and retraction of two sets of scissor lift structures 101. The bidirectional synchronous adjustment assembly 200 includes a telescopic rod 201, a rotating seat 202, a bidirectional screw 203, and two threaded seats 204. The rotating seat 202 is installed inside the mounting cavity via the telescopic rod 201. The telescopic rod 201 and the rotating seat 202 are located in the middle position of the mounting cavity, that is, in the middle position of the scissor lift structure 101. The bidirectional screw 203 is rotatably mounted on the rotating seat 202. The scissor lift structure 101 is rotatably connected to two connecting shafts. The two threaded seats 204 are respectively fixedly connected between the corresponding two connecting shafts. The two threaded seats 204 are symmetrically arranged around the bidirectional screw 203, and the two threaded seats 204 are respectively threadedly connected to the two threaded sections of the bidirectional screw 203. Both ends of the bidirectional screw 203 are fixedly connected to a driving rotating block 205, which is in the shape of a screw head.

[0054] When the stabilizing counterweight 2 needs to be raised or lowered, the bidirectional screw 203 is rotated. Through the threaded connection between the threaded seat 204 and the bidirectional screw 203, and the limiting effect of the scissor structure 101 on the threaded seat 204, the threaded seat 204 can move. This, in turn, drives the connecting shaft to move. The two external threads on the bidirectional screw 203 rotate in opposite directions, allowing for relative movement of the two threaded seats 204. As the two threaded seats 204 approach each other, the corresponding two connecting shafts move closer together, pressing the scissor structure 101 inward. This causes the scissor structure 101 to expand vertically, lowering the stabilizing counterweight 2 until it contacts the ground. This provides support for the noise reduction device used in road and bridge engineering. Furthermore, the substantial mass of the stabilizing counterweight 2 ensures the stability of the device used in road and bridge engineering. To ensure the stability of the noise reduction device for the beam engineering, the bidirectional screw 203 is rotated in the opposite direction, causing the two threaded seats 204 to move away from each other. This allows the scissor structure 101 to be compressed in the vertical direction, which in turn causes the stabilizing counterweight 2 to rise. Only the moving wheel 5 is in contact with the ground, making it easy to move the noise reduction device used in road and bridge engineering. The telescopic rod 201 is a common sliding cylinder and sliding rod combination structure. During the extension and retraction of the scissor structure 101, the height of the connecting shaft changes. The extension and retraction of the telescopic rod 201 can adapt to the change in the height of the connecting shaft. At the same time, under the limiting action of the telescopic rod 201, the symmetry of the two threaded seats 204 and the stability of the scissor structure 101 can be ensured. In the actual construction process, a motor or electric drill can be used to drive a screwdriver or screw head to rotate the drive rotating block 205, which in turn drives the bidirectional screw 203 to rotate.

[0055] Please see Figure 1 , Figure 3 and Figure 7 The sound barrier body 300 includes a main sound insulation panel 301 and a secondary sound insulation panel 302. Multiple sliders 303 are fixedly connected to one end of the secondary sound insulation panel 302 near the main sound insulation panel 301. The main sound insulation panel 301 has multiple grooves that match the sliders 303. The sliders 303 slide within the grooves, enabling the secondary sound insulation panel 302 and the main sound insulation panel 301 to slide together. Both the main sound insulation panel 301 and the secondary sound insulation panel 302 include a splicing frame 304 and multiple noise reduction units 500. The noise reduction units 500 are installed inside the splicing frame 304. The sound insulation panel 302 is connected to a multi-level limiting assembly 400 for limiting the position of the secondary sound insulation panel 302. The multi-level limiting assembly 400 includes a limiting connecting plate 401, multiple equidistant limiting rods 402 and multiple fixing bolts. The equidistant limiting rods 402 and the limiting connecting plate 401 are fixedly connected. The multiple equidistant limiting rods 402 are equidistantly arranged on the limiting connecting plate 401. The main sound insulation panel 301 has multiple limiting holes equidistantly opened to match the equidistant limiting rods 402. The limiting connecting plate 401 is detachably connected to the secondary sound insulation panel 302 through multiple fixing bolts.

[0056] When the noise level is high, the height of the main body 300 of the sound barrier needs to be adjusted. The adjustment method is to raise or lower the secondary sound insulation panel 302, loosen the fixing bolts to release the fixation of the limiting connecting plate 401 and the equidistant limiting rod 402, pull the equidistant limiting rod 402 out from the inside of the limiting hole to release the limitation of the secondary sound insulation panel 302. The secondary sound insulation panel 302 can rise or fall by the distance between one or more limiting rods. Insert multiple equidistant limiting rods 402 into the corresponding multiple limiting holes, tighten the fixing bolts to fix the limiting connecting plate 401 and the equidistant limiting rod 402, and the secondary sound insulation panel 302 can be supported and limited by the multiple equidistant limiting rods 402.

[0057] Please see Figure 9 The noise reduction unit 500 includes a mounting frame 501, a sound-absorbing part 600, and a sound-insulating part 700. Multiple mounting frames 501 are fixedly installed inside the splicing frame 304, and the sound-absorbing part 600 and the sound-insulating part 700 are both installed inside the mounting frames 501. The sound-absorbing part 600 includes a protective plate 601 and multiple sound-absorbing perforated plates 602. The protective plate 601 and the sound-absorbing perforated plates 602 are both installed inside the mounting frame 501, and the protective plate 601 is located on the outside. The sound-insulating part 700 includes multiple tempered glass 701, and a sound-insulating damping adhesive 702 is provided between two adjacent tempered glass 701.

[0058] The main sound insulation panel 301 is installed on the inner side of the road and bridge, and the protective panel 601 is located on the side close to the inner side of the road and bridge. The protective panel 601 can protect against debris and splashes generated during construction, preventing damage to the noise reduction unit 500. The sound-absorbing perforated panel 602 can reflect and absorb construction noise. The surface of the sound-absorbing perforated panel 602 has many small holes. After the sound enters the small holes, it will be randomly reflected in the inner wall of the structure, which is somewhat like a sponge, until most of the sound wave energy is consumed and turned into heat energy, thus achieving the sound insulation effect. Various sound sources in road and bridge engineering emit noise, which is transmitted through the air medium. When the noise is transmitted to the mounting frame 501 at the noise reduction unit 500, it is gradually attenuated by the sound insulation part 700. In particular, when the noise passes through the sound insulation damping glue, the medium-wave noise and long-wave noise are absorbed, distorted, and attenuated by the sound insulation damping glue, which can effectively filter out medium-wave and long-wave noise and achieve the noise reduction effect.

[0059] Please see Figure 1 and Figure 3 The top noise reflector 3 is installed on top of the secondary sound insulation plate 302. The top noise reflector 3 is a curved plate shape that bends towards the main sound insulation plate 301. By raising and lowering the secondary sound insulation plate 302, the top noise reflector 3 can always be located on top of the sound barrier body 300 to reflect the construction noise between the noise reduction devices used in road and bridge engineering and reduce the transmission of noise.

[0060] Please see Figure 1 and Figure 2 The sound barrier connector 1000 is rotatably mounted on the main sound insulation panel 301 and is used to connect two adjacent sound barrier bodies 300. The sound barrier connector 1000 includes a connecting plate 1001 and a connecting bolt 1002. The connecting plate 1001 is rotatably mounted on the side of the main sound insulation panel 301 away from the secondary sound insulation panel 302. The connecting plate 1001 has a connecting hole, and the connecting bolt 1002 is located inside the connecting hole. The other side of the main sound insulation panel 301 has multiple connecting screw holes that match the connecting bolt 1002. When it is necessary to connect the two sound barrier bodies 300, the two sound insulation panels are pressed together and oriented in the same direction. The connecting plate 1001 is rotated to a horizontal position so that the connecting bolt 1002 is exactly located at the connecting screw hole. The connecting bolt 1002 is screwed into the connecting screw hole to connect the two sound barrier bodies 300. Loosening the connecting bolt 1002 disconnects the two sound barrier bodies 300.

[0061] Please see Figure 3 The telescopic bracing structure 800 includes a sliding telescopic component 900, which is rotatably mounted on the secondary sound insulation plate 302. A support seat 801 is rotatably connected to the end of the sliding telescopic component 900 away from the secondary sound insulation plate 302. The sliding telescopic component 900 includes a rotating plate 901, a sliding seat 902, and a sliding rod 903. The rotating plate 901 is rotatably connected to the secondary sound insulation plate 302 via a hinge. The sliding seat 902 is slidably fitted around the rotating plate 901, and the sliding seat 902 and the rotating plate 901 are in a sliding fit. A locking screw is threaded onto the sliding seat 902, and the locking screw contacts the rotating plate 901. The sliding rod 903 is fixedly connected to the sliding seat 902. A limit seat 904 is fixedly connected to the rotating plate 901, and the sliding rod 903 and the limit seat 904 are in a sliding fit. The support 801 and the sliding rod 903 are rotatably connected. The rotating plate 901 can rotate in the vertical direction through the hinge seat. The sliding rod 903 can be moved by the sliding seat 902 and the rotating plate 901, realizing the extension and retraction of the sliding telescopic component 900 and adjusting the length of the sliding telescopic component 900. At the same time, the sliding rod 903 can be limited by the limiting seat 904 to improve the stability of the sliding rod 903. Through the extension and retraction of the sliding telescopic component 900 and the rotation of the rotating plate 901 in the vertical direction, the raising and lowering of the secondary sound insulation panel 302 can be accommodated. At the same time, the position of the support 801 can be adjusted. The support 801 is in contact with the ground. The telescopic diagonal brace structure 800 can support the outside of the sound barrier body 300 to ensure the stability of the sound barrier body 300.

[0062] Multiple fixing holes are provided on both the movable base 1 and the support base 801. Multiple ground nails 4 are respectively set inside the corresponding fixing holes to lock the telescopic bracing mechanism and the movable base 1. The bottom end of the ground nail 4 is pointed and the outside of the ground nail 4 is provided with external threads to facilitate the driving of the ground nail 4 into the ground to fix the movable base 1 and the support base 801, thereby further improving the stability of the noise reduction device used in road and bridge engineering.

[0063] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A noise reduction device for road and bridge engineering, characterized in that, include: A movable base (1) is provided with a plurality of casters (5) mounted on its bottom. Multiple stabilizing counterweights (2) are slidably mounted on the bottom of the movable base (1), and the movable base (1) is equipped with multiple scissor-type synchronous lifting mechanisms (100) for driving the stabilizing counterweights (2) to lift and lower. The sound barrier body (300) includes a main sound insulation panel (301) and a secondary sound insulation panel (302). The secondary sound insulation panel (302) and the main sound insulation panel (301) are in sliding fit. Both the main sound insulation panel (301) and the secondary sound insulation panel (302) include a splicing frame (304) and multiple noise reduction units (500). The noise reduction units (500) are installed inside the splicing frame (304). The secondary sound insulation panel (302) is connected to a multi-level limiting component (400) for limiting the position of the secondary sound insulation panel (302). Top noise reflector (3), which is installed on top of the sub-sound insulation panel (302); Multiple sound barrier connectors (1000) are rotatably mounted on the main sound insulation panel (301) for connecting two adjacent sound barrier bodies (300); Multiple telescopic bracing structures (800) are provided, each including a sliding telescopic component (900), which is rotatably mounted on the secondary sound insulation plate (302). A support base (801) is rotatably connected to one end of the sliding telescopic component (900) away from the secondary sound insulation plate (302). Multiple ground nails (4), multiple fixing holes are provided on both the movable base (1) and the support base (801), and the multiple ground nails (4) are respectively set inside the corresponding fixing holes for locking the telescopic bracing mechanism and the movable base (1); The scissor-type synchronous lifting mechanism (100) includes two sets of scissor structures (101). The movable base (1) has an installation cavity. The top of the scissor structure (101) and the inner top wall of the installation cavity are in sliding fit. The bottom of the two sets of scissor structures (101) are rotatably connected to a lifting connecting frame (103). The stabilizing counterweight (2) is installed at the bottom of the corresponding lifting connecting frame (103). A bidirectional synchronous adjustment component (200) for driving the two sets of scissor structures (101) to extend and retract is connected between the two sets of scissor structures (101). The noise reduction unit (500) includes a mounting frame (501), a sound-absorbing part (600), and a sound-insulating part (700). Multiple mounting frames (501) are fixedly installed inside the splicing frame (304), and the sound-absorbing part (600) and the sound-insulating part (700) are both installed inside the mounting frame (501). The sound-absorbing part (600) includes a protective plate (601) and a plurality of sound-absorbing perforated plates (602). The protective plate (601) and the sound-absorbing perforated plates (602) are both installed inside the mounting frame (501), and the protective plate (601) is located on the outside. The sound insulation part (700) includes a plurality of tempered glass (701), and a sound insulation damping adhesive (702) is provided between two adjacent tempered glass (701). The multi-level limiting assembly (400) includes a limiting connecting plate (401), multiple equidistant limiting rods (402), and multiple fixing bolts. The equidistant limiting rods (402) are connected to the limiting connecting plate (401). The multiple equidistant limiting rods (402) are equidistantly arranged on the limiting connecting plate (401). The main sound insulation plate (301) has multiple limiting holes equidistantly opened to match the equidistant limiting rods (402). The limiting connecting plate (401) is detachably connected to the secondary sound insulation plate (302) through multiple fixing bolts. The sliding telescopic assembly (900) includes a rotating plate (901), a sliding seat (902), and a sliding rod (903). The rotating plate (901) is rotatably connected to the secondary sound insulation plate (302) via a hinge seat. The sliding seat (902) and the rotating plate (901) are in sliding fit. The sliding seat (902) is threaded with a locking screw. The sliding rod (903) and the sliding seat (902) are fixedly connected. The support seat (801) and the sliding rod (903) are rotatably connected. The secondary sound insulation plate (302) is fixedly connected to a plurality of sliders (303) at one end near the main sound insulation plate (301), and the main sound insulation plate (301) has a plurality of grooves that match the sliders (303).

2. The noise reduction device for road and bridge engineering according to claim 1, characterized in that, The bidirectional synchronous adjustment assembly (200) includes a telescopic rod (201), a rotating seat (202), a bidirectional screw (203), and two threaded seats (204). The rotating seat (202) is installed inside the mounting cavity via the telescopic rod (201). The bidirectional screw (203) is rotatably mounted on the rotating seat (202). The two threaded seats (204) are threadedly connected to the two threaded sections of the bidirectional screw (203) respectively. The two threaded seats (204) are rotatably connected to both sides of the scissor structure (101) respectively.

3. The noise reduction device for road and bridge engineering according to claim 1, characterized in that, The sound barrier connector (1000) includes a connecting plate (1001) and a connecting bolt (1002). The connecting plate (1001) is rotatably mounted on one side of the main sound barrier (301) away from the secondary sound barrier (302). The connecting plate (1001) has a connecting hole, and the connecting bolt (1002) is disposed inside the connecting hole. The other side of the main sound barrier (301) has a plurality of connecting screw holes that match the connecting bolt (1002).

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