Meta-structure totally-closed transparent sound barrier applied to rail transit

Abstract

The utility model discloses a super-structure totally-closed transparent sound barrier applied to rail transit, which comprises a barrier main body, a first transparent super-structure sound insulation plate is positioned and mounted on the side surface of the barrier main body, a second transparent super-structure sound insulation plate is mounted at the top of the barrier main body, and a clamping seat is mounted at the bottom of the barrier main body. An unpowered silencer is installed in the middle of the upper end of the barrier body, and a keel frame is installed between the barrier body and the second transparent super-structure sound insulation plate. According to the super-structure totally-closed transparent sound barrier applied to the rail transit, reflected sound is reduced, and therefore the influence on surrounding sensitive points and the internal sound environment of a train due to the fact that the reflected sound is enhanced is reduced; the acoustic lifting is reduced, so that the overall sound insulation performance of the totally-closed sound barrier is improved; the surface of the barrier is provided with a sound insulation buffering anti-collision structure, elastic materials are additionally arranged, a layer of springback flexible plate is formed on the surface, on one hand, the sound insulation effect is improved, and on the other hand, the anti-collision protection effect is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of rail transit environmental acoustics, in particular to a superstructure full-closed transparent sound barrier for rail transit. BACKGROUND

[0002] The superstructure full-closed transparent sound barrier for rail transit is a supporting device for sound insulation of rail transit. In recent years, high-speed rail, rail transit and other high-speed traffic have been developing rapidly. With the increasing mileage of high-speed traffic, the speed of high-speed rail and rail transit has also been increasing. The design speed of high-speed rail can reach 350 km / h, and the design speed of rail transit can reach 140 km / h.

[0003] Some high-speed rail and rail transit pass through urban areas. At this time, the noise generated by the train traveling spreads to the sound environment sensitive area of the city. To reduce the impact of the traveling train on the sound environment of the sensitive area, an upright sound barrier or a full-closed sound barrier is usually added on both sides of the track.

[0004] When a full-closed sound barrier is arranged on both sides of the track, the train enters the full-closed sound barrier, and the train enters the limited space at high speed from the open space. When the sound waves emitted by the train noise source meet the full-closed sound barrier, they will propagate along three paths. Part of it is diffracted through the entrance and exit of the full-closed sound barrier to reach the sound receiving point. Part of it penetrates the sound barrier to reach the sound receiving point. Part of it is reflected on the sound barrier wall to form a reverberation sound field inside the full-closed sound barrier, causing "acoustic" uplift. The acoustic performance of the full-closed sound barrier mainly depends on the distribution of sound energy along the three paths of the sound waves emitted by the sound source. With the continuous development of science and technology, people's requirements for the manufacturing process of the superstructure full-closed transparent sound barrier for rail transit are also getting higher and higher.

[0005] The existing rail transit barrier has certain disadvantages when in use. To ensure a certain light transmission area, the conventional full-closed sound barrier often uses transparent sound insulation boards (i.e. acrylic boards or PC boards). The transparent sound insulation board has a certain sound insulation amount, but the sound absorption coefficient is very small. When the vehicle passes through the full-closed sound barrier, the train noise inside the full-closed sound barrier forms a reverberation field due to the use of a large area of transparent sound insulation board (the area of the sound insulation board is usually > 50%), causing "acoustic uplift" inside the full-closed sound barrier. Not only does it affect the acoustic performance of the full-closed sound barrier, but also it affects the sound environment quality inside the vehicle, thereby reducing the passenger experience. Even the reverberation field noise radiates noise outward through the entrance and exit of the full-closed sound barrier, affecting the surrounding sound environment quality. Therefore, we propose a superstructure full-closed transparent sound barrier for rail transit. UTILITY MODEL CONTENTS

[0006] The technical problems solved: In view of the deficiencies of the prior art, the utility model provides a superstructure full -enclosed transparent sound barrier for rail transit, reduces reflection sound, thereby reduces the influence of reflection sound on the surrounding sensitive point and the train internal sound environment, reduces acoustic uplift, thereby improves the overall sound insulation performance of full -enclosed sound barrier, sets up the buffer anti -collision structure with sound insulation on the surface of the barrier, adds the material with elasticity, forms a layer of rebound flexible plate on the surface, increases the sound insulation effect on one hand, increases the effect of anti -collision protection on the other hand, can effectively solve the problems in the background art.

[0007] Technical scheme: In order to achieve the above object, the utility model takes the technical scheme that a superstructure full -enclosed transparent sound barrier for rail transit, including barrier main part, the side of barrier main part is positioned and installs first transparent superstructure sound insulation board, the top of barrier main part is installed with second transparent superstructure sound insulation board, the bottom of barrier main part is installed with clamping seat, the upper end middle part of barrier main part is installed with unpowered silencer, the barrier main part is installed with keel frame between second transparent superstructure sound insulation board, the second transparent superstructure sound insulation board is provided with composite sound insulation mechanism, the composite sound insulation mechanism includes first PC micro -perforated plate, second PC micro -perforated plate, PC board and PC perforated plate, the second PC micro -perforated plate is located on the upper end of PC perforated plate, the first PC micro -perforated plate is located on the upper end of second PC micro -perforated plate, the PC board is located on the upper end of first PC micro -perforated plate, PC keel is positioned between PC board, first PC micro -perforated plate, second PC micro -perforated plate and PC perforated plate.

[0008] Preferably, the outer surface of the barrier main body is positioned with a buffer anti -collision structure, the buffer anti -collision structure includes a buffer plate and a positioning plate, a buffer structure is installed between the buffer plate and the positioning plate, the buffer structure includes a positioning assembly, a damper and a buffer spring, the positioning assembly is positioned at both ends of the damper, the buffer spring is located on the outer side of the damper, and the outer surface of the buffer plate is positioned with a sound insulation cotton board.

[0009] Preferably, the barrier main body and the first transparent superstructure sound insulation board, the second transparent superstructure sound insulation board are positioned and installed through the keel frame, and the bottom of the barrier main body is fixed through the clamping seat.

[0010] Preferably, the PC board, the first PC micro -perforated plate, the second PC micro -perforated plate and the PC perforated plate are fixed through the PC keel.

[0011] Preferably, the barrier main body and the buffer anti -collision structure are fixed through bolts, and the buffer plate and the positioning plate are buffered through the buffer structure.

[0012] Preferably, the buffer plate and the sound insulation cotton plate are fixed by strong glue, and the damper and the buffer spring drive the positioning plate and the buffer plate to be elastically movable.

[0013] Beneficial effects: Compared with the prior art, the utility model provides a kind of superstructure full-enclosed transparent sound barrier for rail transit, with the following beneficial effects: the superstructure full-enclosed transparent sound barrier for rail transit reduces reflected sound, thereby reducing the influence of reflected sound on surrounding sensitive points and train interior sound environment;Reduce acoustic uplift, thereby improving the overall sound insulation performance of the full-enclosed sound barrier;The surface of the barrier is provided with a sound-insulating buffer anti-collision structure, and a flexible material is added to form a layer of flexible rebound plate on the surface, which increases the sound insulation effect and the anti-collision protection effect, and the superstructure full-enclosed transparent sound barrier for rail transit has simple structure and convenient operation, and the use effect is better than that of traditional mode. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a whole structure schematic diagram of the utility model a kind of superstructure full-enclosed transparent sound barrier for rail transit.

[0015] Figure 2 It is a structure schematic diagram of the utility model a kind of superstructure full-enclosed transparent sound barrier for rail transit in A place enlarged view.

[0016] Figure 3 It is a structure schematic diagram of the utility model a kind of superstructure full-enclosed transparent sound barrier for rail transit in buffer anti-collision structure.

[0017] Figure 4 It is a structure schematic diagram of the utility model a kind of superstructure full-enclosed transparent sound barrier for rail transit in buffer structure.

[0018] Figure 5 It is a sound wave propagation path schematic diagram of the utility model a kind of superstructure full-enclosed transparent sound barrier for rail transit.

[0019] Figure 6 It is a model parameter schematic diagram of the utility model a kind of superstructure full-enclosed transparent sound barrier for rail transit.

[0020] In the figure: 1, barrier main body;2, second transparent superstructure sound insulation board;3, keel frame;4, composite sound insulation mechanism;5, first transparent superstructure sound insulation board;6, unpowered silencer;7, clamping seat;8, buffer anti-collision structure;9, first PC micro-perforated plate;10, second PC micro-perforated plate;11, PC plate;12, PC perforated plate;13, PC keel;14, buffer plate;15, buffer structure;16, positioning plate;17, sound insulation cotton plate;18, positioning assembly;19, damper;20, buffer spring. DETAILED DESCRIPTION

[0021] The technical solutions of the utility model will be described clearly and completely in combination with the drawings and specific embodiments below, but those skilled in the art will understand that the following described embodiments are part of the embodiments of the utility model, not all the embodiments, and are only used to illustrate the utility model, and should not be regarded as limiting the scope of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without making creative labor are within the protection scope of the utility model. The unmarked specific conditions in the embodiments are carried out according to the conventional conditions or the conditions suggested by the manufacturer. The reagents or instruments used are not marked with the manufacturer, and are all conventional products that can be obtained by market purchase.

[0022] In the description of the utility model, it needs to be explained that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is the orientation or position relationship based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model. The indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0023] In the description of the utility model, it needs to be explained that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected, can be mechanically connected, or electrically connected, can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0024] As Figures 1-6As shown, a kind of superstructure full-closed transparent sound barrier for rail transit, including barrier main body 1, first transparent superstructure sound insulation board 5 is positioned and installed on the side of barrier main body 1, second transparent superstructure sound insulation board 2 is installed on the top of barrier main body 1, card seat 7 is installed on the bottom of barrier main body 1, no-power muffler 6 is installed on the upper end middle part of barrier main body 1, keel frame 3 is installed between barrier main body 1 and second transparent superstructure sound insulation board 2, composite sound insulation mechanism 4 is provided on second transparent superstructure sound insulation board 2, composite sound insulation mechanism 4 includes first PC micro-perforated plate 9, second PC micro-perforated plate 10, PC plate 11 and PC perforated plate 12, second PC micro-perforated plate 10 is located on the upper end of PC perforated plate 12, first PC micro-perforated plate 9 is located on the upper end of second PC micro-perforated plate 10, PC plate 11 is located on the upper end of first PC micro-perforated plate 9, PC keel 13 is positioned between PC plate 11, first PC micro-perforated plate 9, second PC micro-perforated plate 10 and PC perforated plate 12, to reduce reflected sound, thereby reducing the influence of reflected sound on surrounding sensitive points and train interior sound environment;Reduce acoustic uplift, thereby improving the overall sound insulation performance of full-closed sound barrier;The surface of the barrier is provided with a sound-insulating buffer crash structure, a material with elasticity is added, and a layer of elastic flexible plate is formed on the surface, which increases the sound insulation effect and the effect of collision protection.

[0025] Further, the outer surface of barrier main body 1 is positioned with buffer crash structure 8, buffer crash structure 8 includes buffer plate 14 and positioning plate 16, buffer structure 15 is installed between buffer plate 14 and positioning plate 16, buffer structure 15 includes positioning assembly 18, damper 19 and buffer spring 20, positioning assembly 18 is positioned at both ends of damper 19, buffer spring 20 is located outside damper 19, and the outer surface of buffer plate 14 is positioned with sound insulation cotton board 17.

[0026] Further, barrier main body 1 and first transparent superstructure sound insulation board 5, second transparent superstructure sound insulation board 2 are positioned and installed through keel frame 3, and the bottom of barrier main body 1 is fixed through card seat 7.

[0027] Further, PC plate 11, first PC micro-perforated plate 9, second PC micro-perforated plate 10 and PC perforated plate 12 are fixed through PC keel 13.

[0028] Further, barrier main body 1 and buffer crash structure 8 are fixed through bolts, and buffer plate 14 and positioning plate 16 are buffered movably through buffer structure 15.

[0029] Further, buffer plate 14 and sound insulation cotton board 17 are fixed through strong glue, and damper 19 and buffer spring 20 drive positioning plate 16 and buffer plate 14 to elastically move.

[0030] Working principle: the utility model discloses a barrier main body 1, second transparent superstructure sound insulation board 2, keel frame 3, composite sound insulation mechanism 4, first transparent superstructure sound insulation board 5, unpowered silencer 6, clamping seat 7, buffer anti -collision structure 8, first PC microperforated plate 9, second PC microperforated plate 10, PC board 11, PC perforated plate 12, PC keel 13, buffer plate 14, buffer structure 15, locating plate 16, sound insulation cotton board 17, positioning assembly 18, damper 19, buffer spring 20, reduce reflected sound, thereby reduce the influence of the reflection sound strengthening on the peripheral sensitive point and the train interior sound environment;Reduce acoustic uplift, thereby improve the overall sound insulation performance of the full-closed sound barrier;The surface of the barrier is provided with the buffer anti -collision structure with sound insulation, is equipped with the material with elasticity, forms a layer of rebound flexible plate on the surface, on the one hand increases the sound insulation effect, on the other hand increases the effect of anti -collision protection.

[0031] After the train passes through the full-closed sound barrier, the train forms a noise source, and radiates noise outward through three paths, to ensure that the sound insulation and sound absorption requirements of the superstructure full-closed sound barrier meet the relevant requirements, and the related acoustic performance requirements meet the following conditions:

[0032] Transmission performance requirement. The phenomenon that the sound wave emitted by the sound source transmits through the sound barrier to the sound receiving point. The sound energy penetrating the sound barrier depends on the surface density of the sound barrier, the incident angle and the frequency of the sound wave. The ability of the sound barrier to sound insulation is evaluated by the transmission loss TL. TL is large, and the transmitted sound energy is small. TL is small, and the transmitted sound energy is large. The reduction of the insertion loss caused by the transmission of sound energy is called the transmission sound correction. It is represented by the symbol ΔLt.

[0033] Reflection performance requirement. In the full-closed sound barrier, the sound wave will be reflected multiple times between the full-closed sound barrier, and diffracted to the sound receiving point through the entrance and exit of the full-closed sound barrier. It will reduce the insertion loss (1.c) of the sound barrier. The reduction of the insertion loss caused by the reflected sound wave is called the reflected sound correction, and is represented by the symbol ΔLr. In order to reduce the reflected sound and increase the transparency of the full-closed sound barrier, the transparent superstructure sound absorption and insulation board is used. The size of the reflected sound energy depends on the sound absorption coefficient α of the sound absorption structure, which is a function of frequency. In order to evaluate the overall sound absorption effect of the sound absorption structure of the sound barrier, the noise reduction coefficient NRC is usually used. Under normal circumstances, the sound absorption coefficient of the transparent sound insulation board can reach 0.8. Reduce the influence of reflected sound on the peripheral sensitive point and the train interior sound environment.

[0034] Acoustic performance analysis report

[0035] According to the simulation of COMSOL software, the transparent superstructure sound absorption and insulation board has a sound insulation Rw≥30dB (A) and a sound absorption NRC≥0.85. The model parameters are as shown in Figure 6 .

[0036] It is to be noted that, in the present document, relational terms such as first and second, and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0037] The basic principle and main features of the present application and the advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only to illustrate the principle of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application.

Claims

1. A superstructured fully enclosed transparent sound barrier for use in rail transit, comprising a barrier body (1), characterized in that: A first transparent superstructure sound insulation panel (5) is positioned and installed on the side of the barrier body (1), a second transparent superstructure sound insulation panel (2) is installed on the top of the barrier body (1), a mounting bracket (7) is installed on the bottom of the barrier body (1), a non-powered silencer (6) is installed in the upper middle part of the barrier body (1), a keel frame (3) is installed between the barrier body (1) and the second transparent superstructure sound insulation panel (2), and a composite sound insulation mechanism (4) is provided on the second transparent superstructure sound insulation panel (2), the composite sound insulation mechanism (4) including A first PC micro-perforated plate (9), a second PC micro-perforated plate (10), a PC plate (11), and a PC perforated plate (12) are provided. The second PC micro-perforated plate (10) is located above the PC perforated plate (12). The first PC micro-perforated plate (9) is located above the second PC micro-perforated plate (10). The PC plate (11) is located above the first PC micro-perforated plate (9). A PC keel (13) is positioned between the PC plate (11), the first PC micro-perforated plate (9), the second PC micro-perforated plate (10), and the PC perforated plate (12).

2. The superstructure fully enclosed transparent sound barrier for rail transit according to claim 1, characterized in that: A buffer anti-collision structure (8) is positioned on the outer surface of the barrier body (1). The buffer anti-collision structure (8) includes a buffer plate (14) and a positioning plate (16). A buffer structure (15) is installed between the buffer plate (14) and the positioning plate (16). The buffer structure (15) includes a positioning component (18), a damper (19), and a buffer spring (20). The positioning component (18) is positioned at both ends of the damper (19). The buffer spring (20) is located on the outside of the damper (19). A sound insulation cotton board (17) is positioned on the outer surface of the buffer plate (14).

3. A fully enclosed transparent sound barrier for rail transit according to claim 1, characterized in that: The barrier body (1) is positioned and installed with the first transparent superstructure sound insulation board (5) and the second transparent superstructure sound insulation board (2) through a keel frame (3), and the bottom of the barrier body (1) is fixed by a card seat (7).

4. A fully enclosed transparent sound barrier for rail transit according to claim 1, characterized in that: The PC board (11), the first PC micro-perforated board (9), the second PC micro-perforated board (10) and the PC perforated board (12) are fixed together by a PC keel (13).

5. A fully enclosed transparent sound barrier for rail transit according to claim 2, characterized in that: The barrier body (1) is fixed to the buffer anti-collision structure (8) by bolts, and the buffer plate (14) and the positioning plate (16) are buffered by the buffer structure (15).

6. A fully enclosed transparent sound barrier for rail transit according to claim 2, characterized in that: The buffer plate (14) and the sound insulation cotton plate (17) are fixed together by strong adhesive. The damper (19) and the buffer spring (20) drive the positioning plate (16) and the buffer plate (14) to move elastically.

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