Shock-resistant composite noise-eliminating sound barrier unit plate

Abstract

The utility model belongs to the technical field of sound barriers, and particularly relates to an impact-resistant sound barrier unit plate with a composite silencing function. The unit plate comprises a cavity formed by a face plate, a back plate and an upper cross beam and a lower cross beam, a sound absorber is arranged in the cavity, the upper side edge and the lower side edge of the face plate and the upper side edge and the lower side edge of the back plate are connected with the side edges of the cross beams through elastic damping structures respectively, and each elastic damping structure comprises opening type grooves formed in the side edges of the cross beams or the face plate or the side edge of the back plate and formed by multiple times of bending. The opening type grooves are overlapped and buckled to form a positioning part, and an elastic filler strip and / or an elastic support are / is arranged in the positioning part and horizontally arranged at the overlapped part of the opening type grooves. The sound barrier unit plate is connected and formed through the elastic damping structure, and has the characteristics of long-acting resistance to impact of high-speed rail pulsating airflow and noise, stable structural connection and capability of completely and fully absorbing sound and reducing noise.

Description

Technical Field

[0001] This utility model belongs to the field of sound barrier technology, specifically relating to an impact-resistant composite sound-absorbing sound barrier unit panel. Background Technology

[0002] Sound barriers are an effective measure for controlling railway noise. Insert-plate sound barriers are composed of steel columns and unit panels. The steel columns are arranged alternately along the railway line, with unit panels inserted between them, forming a noise-reducing sound barrier system on both sides of the railway.

[0003] Current sound barrier unit panels consist of a front panel, a back panel, and sound-absorbing material placed between them. Their internal structure is simple, and the sound-absorbing material is mostly filled with rock wool fiber. This type of sound-absorbing panel cannot achieve the requirement of complete sound absorption and is easily affected by environmental factors such as humidity and ultraviolet radiation, which will cause aging and significantly reduce the sound absorption effect of the sound barrier. Secondly, the unit panels are mostly connected by mechanical means such as rivets and bolts. After being subjected to high-speed airflow and sound wave impact for a long time, the rigid connection lacks effective elastic buffering and is prone to problems such as loosening of structural connections and detachment of panel components, which reduces the service life of the sound barrier. Utility Model Content

[0004] The purpose of this invention is to provide a composite sound barrier unit panel formed by connecting and molding through an elastic damping structure. This unit panel features long-term resistance to the impact of pulsating airflow and noise from high-speed trains, stable structural connection, and complete sound absorption and noise reduction.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A sound barrier unit panel with impact resistance and composite sound absorption, characterized in that: it includes a cavity composed of a panel, a back panel, and upper and lower crossbeams, and a sound absorber is disposed in the cavity; characterized in that: the upper and lower sides of the panel and the back panel are respectively connected to the sides of the crossbeams through an elastic damping structure, the elastic damping structure includes open-shaped grooves formed by multiple bends respectively disposed on the sides of the crossbeams, the sides of the panel or the back panel, the open-shaped grooves overlap and interlock to form a positioning part, and an elastic pad and / or an elastic bracket are disposed in the positioning part, which is horizontally placed at the overlapping part of the open-shaped grooves.

[0007] The additional technical features constituting the aforementioned impact-resistant composite sound-absorbing sound barrier unit panel also include:

[0008] —The cross-section of the opening groove is rectangular. The opening groove of the panel or back plate covers the opening groove of the crossbeam to form the positioning part. The elastic pad is located at the overlapping contact position of the positioning part. The elastic bracket is located inside the positioning part and is used to support the overlapping relative position of the two opening grooves.

[0009] —The elastic pad and the elastic bracket are located on both sides of the vertical section of the open groove of the crossbeam. Both the elastic pad and the elastic bracket are I-shaped, with their heads placed in the slots on both sides of the vertical section. The elastic bracket has a symmetrical arc plate in the middle.

[0010] —The inner side of the panel is provided with a sound-absorbing liner, and the surfaces of the panel and the sound-absorbing liner are provided with sound-absorbing holes; the inner side of the back panel is provided with a sound-absorbing liner, and both the sound-absorbing liner and the sound-absorbing liner are made of aluminum foam and have a corrugated cross-sectional shape.

[0011] —Two positioning brackets are symmetrically arranged inside the cavity to limit the sound absorber. The upper end of the positioning bracket is vertically bent to form a U-shaped head. A groove is formed in the middle of the crossbeam. The U-shaped head is placed in the groove. The bent part of the positioning bracket is positioned with the side wall of the groove of the crossbeam above by a slot and a strip.

[0012] —High-strength cement fiberboard is provided on the inner side of both positioning brackets, and sound-absorbing holes are arranged on the surface of the high-strength cement fiberboard near the panel.

[0013] The lower end of the positioning bracket is positioned to the side wall of the crossbeam sink trough below by means of a slot and a strip. A trapezoidal water-blocking plate is installed in the sink trough, and the water-blocking plate is connected to the horizontal baffle at the lower end of the positioning bracket.

[0014] — Buffer pads are provided on the outer sides of both the upper and lower crossbeams. The buffer pads are composed of a middle strip and tubes on both sides. The middle strip is connected to the middle of the crossbeam by rivet bolts.

[0015] —The sound absorber is granular or fluffy sound-absorbing ceramic particles;

[0016] — Vertical enclosures are provided on both sides of the cavity constituting the sound barrier unit panel, and the edges of the vertical enclosures are connected to the upper and lower crossbeams, the front panel, and the back panel respectively by bending and fastening; or a sealing layer composed of polyurethane foam is provided on the side of the cavity constituting the sound barrier unit panel.

[0017] Compared with the prior art, the impact-resistant composite sound-absorbing sound barrier unit panel provided by this utility model has the following advantages: The upper and lower sides of the panel and back panel of this sound barrier unit panel are connected to the sides of the crossbeam through an elastic damping structure to form the main frame. This ensures that the panel surface can achieve elastic buffering after being subjected to impact load, reducing the damage to the unit panel structure and ensuring that the unit panel can fully perform its sound absorption and noise reduction function. Specifically, the elastic damping structure includes open grooves formed by multiple bends respectively set on the sides of the crossbeam, panel, or back panel. The open grooves overlap and interlock to form a positioning part. Elastic pads and / or elastic supports are set in the positioning part, which are horizontally placed at the overlapping part of the open grooves. That is, the elastic pads and / or elastic supports achieve sufficient buffer deformation margin at the overlapping connection part, and also achieve the effect of damping and vibration reduction. This ensures the stable connection of the bent and interlocked positioning part, extends the effective service life of the unit panel, and has the advantages of compact structure, safety and stability, economy and durability. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a sound barrier unit panel for impact-resistant composite noise reduction according to this utility model. Detailed Implementation

[0019] The impact-resistant composite sound-absorbing sound barrier unit panel structure and working principle provided by this utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] In the description of this utility model, unless otherwise stated, the terms "inner / outer", "upper / lower", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0021] It should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "set / equipped" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] like Figure 1As shown, the impact-resistant composite sound barrier unit panel structure includes a cavity 4 consisting of a panel 1, a back panel 2, and upper and lower crossbeams (31, 32). A sound absorber 41 is installed inside the cavity 4. The upper and lower sides of the panel 1 and the back panel 2 are connected to the sides of the crossbeams (31, 32) through an elastic damping structure 5. The elastic damping structure 5 includes open grooves (51, 52) formed by multiple bends, which are respectively installed on the sides of the panel 1 or the back panel 2 and the sides of the crossbeams (31, 32). The open grooves (51, 52) overlap and interlock to form a positioning part. An elastic pad 61 and / or an elastic bracket 62 are installed inside the positioning part, which are horizontally placed at the overlapping part of the open grooves (51, 52).

[0023] Its working principle is as follows: The main frame of the unit board consists of a panel 1, a back panel 2 and upper and lower crossbeams (31, 32). The cavity 4 is equipped with a sound absorber 41. Since the upper and lower sides of the panel 1 and the back panel 2 are connected to the sides of the upper and lower crossbeams (31, 32) through elastic damping structures 5, the load buffering, structural stability, vibration reduction and noise reduction effects are achieved.

[0024] The elastic damping structure 5 includes open grooves (51, 52) formed by multiple bends respectively provided on the side of the panel 1 or the back panel 2 and the side of the crossbeam (31, 32). The open grooves (51, 52) overlap and interlock to form a positioning part. An elastic pad 61 and / or an elastic bracket 62 are provided in the positioning part. The elastic pad 61 and the elastic bracket 62 are horizontally placed at the overlapping part of the open grooves (51, 52). That is, the elastic pad 61 and the elastic bracket 62 deform to relieve the impact of pulse airflow and sound waves on the unit board. The positioning part with the bend and interlock is more stable and improves the durability of the unit board.

[0025] It should be noted that, since the elastic pads 61 and elastic supports 62 are horizontally placed at the overlapping part of the open grooves (51, 52), the air pressure changes that occur when the high-speed train approaches or moves away from the sound barrier will produce elastic deformation in opposite directions at the positioning part. The unit panel exhibits a "breathing" effect. When it approaches, sound and airflow enter the unit panel cavity 4, resulting in more thorough sound absorption and noise reduction. When it moves away, the unit panel 1 discharges airflow and pressure, reducing the damage to the unit panel structure caused by load impact.

[0026] In the aforementioned sound barrier unit panel structure that constitutes the impact-resistant composite sound absorption,

[0027] —In one embodiment, the cross-section of the above-mentioned open grooves (51, 52) is rectangular, that is, the open grooves (51, 52) are formed by bending the edges twice. The rectangular structure is consistent with the shape of the unit plate, which facilitates the insertion and insertion installation.

[0028] The opening groove 51 of the panel 1 or the back panel 2 covers the opening groove 52 of the crossbeam to form a positioning part. That is, the panel 1 and the back panel 2 cover the side of the crossbeam (31, 32) from the outside, making the appearance more closed and preventing dust, water and other substances from entering the interior of the unit panel.

[0029] The elastic pad 61 is located at the overlapping contact position of the positioning part (compression support), and the elastic bracket 62 is located inside the positioning part to support the overlapping relative position of the two open grooves (51, 52) (spatial support). That is, the two can achieve two damping buffer effects in opposite directions, which can effectively reduce vibration and noise when the high-speed train approaches or moves away.

[0030] — Preferably, the elastic pad 61 and the elastic bracket 62 are located on both sides of the vertical section of the open groove 52 of the crossbeam (31, 32). Both the elastic pad 61 and the elastic bracket 62 are I-shaped, and their heads are placed in the slots 60 on both sides of the vertical section. That is, they are set horizontally to facilitate processing and manufacturing. The slots 60 on both sides of the vertical section can provide effective support and positioning for the elastic pad 61 and the elastic bracket 62. In order to enhance the structural stability of the elastic bracket 62, it is made of metal profile, and it is best to set a symmetrical arc plate 63 in the middle to have better rebound and stopping performance.

[0031] —Furthermore, the inner side of the panel 1 is provided with a sound-absorbing liner 71, and the surfaces of the panel 1 and the sound-absorbing liner 71 are evenly distributed with sound-absorbing holes 10; the inner side of the back panel 2 is provided with a sound-absorbing liner 72, that is, a double-layer composite sound absorption system is formed in the unit panel, which can fully and completely eliminate noise. The sound-absorbing liner 71 and the sound-absorbing liner 72 are both made of foamed aluminum and their cross-sectional shape is corrugated. On the basis of absorbing sound waves, the corrugated surface can effectively reflect and scatter sound wave energy, and can also provide elastic support for the panel 1 and the back panel 2, reducing the impact of load;

[0032] — Preferably, two positioning brackets 8 are symmetrically arranged inside the cavity 4 to limit the sound absorber 41. The upper end of the positioning bracket 8 is vertically bent to form a U-shaped head 81, and a groove (301, 302) is formed in the middle of the crossbeam (31, 32). The U-shaped head 81 is placed in the groove 601. The bent part of the positioning bracket 8 is positioned with the side wall of the groove of the upper crossbeam by a slot and a strip 80. That is, the positioning bracket 8 facilitates the installation of the sound absorber 41. The sound absorber 41 does not shift when it is working. The structure is stable and does not fall apart, which is conducive to giving full play to the sound absorption function.

[0033] —Furthermore, high-strength cement fiberboard 82 is provided on the inner side of both positioning brackets 8. Sound-absorbing holes 10 are arranged on the surface of the high-strength cement fiberboard 82 near the panel 1, which strengthens the structural strength of the positioning brackets 8 and the protection effect on the internal sound absorber 41.

[0034] —The lower end of the positioning bracket 8 is positioned with the side wall of the lower crossbeam sink trough by means of a slot and a strip 80. A trapezoidal water baffle 83 is set in the sink trough 302. The water baffle 83 is connected to the horizontal baffle 84 at the lower end of the positioning bracket 8. That is, the water baffle 83 raises the overall height of the unit plate cavity 4, which facilitates bottom drainage and prevents water from entering the cavity 4.

[0035] —Preferredly, buffer pads 9 are provided on the outer sides of the upper and lower crossbeams (31, 32). The buffer pads 9 are composed of a middle strip 91 and tubes 92 on both sides. The middle strip 91 is connected to the middle of the crossbeams (31, 32) by rivet bolts 93. The buffer pads 9 are made of elastic rubber and play a role in sealing, positioning and buffering protection when the unit panel is installed as a whole.

[0036] —As a preferred embodiment, the sound absorber 41 is a granular or loose sound-absorbing ceramic particle. The sound-absorbing ceramic particle is generally made by sintering recycled construction waste. Irregular micropores are formed on the surface, which not only has a good sound absorption effect but also has strong surface stress. Its sound absorption performance has a longer service life compared with conventional rock wool.

[0037] When a high-speed train approaches a sound barrier, the impact air pressure and noise enter the unit panel. The sound-absorbing ceramic particles are dispersed by the impact and fill the entire cavity (e.g., Figure 1 As shown, the granular ceramic particles collide and rub against each other to consume energy, effectively converting high-speed impact into mechanical and thermal energy for consumption, achieving a complete sound absorption and noise reduction effect. The high-speed rail is far away from the sound barrier, and the granular ceramic particles re-gather at the bottom of cavity 4. The space ratio of sound-absorbing ceramic particles in cavity 4 should be between 1 / 2 and 2 / 3.

[0038] —To improve the sealing performance of the cavity 4 within the unit panel, vertical enclosures are installed on both sides of the cavity 4 constituting the sound barrier unit panel. The edges of the vertical enclosures are connected to the upper and lower crossbeams (31, 32), the panel 1, and the back panel 2 respectively by bending and fastening. As an equivalent alternative, the sides of the cavity 4 constituting the sound barrier unit panel can also be sealed with fire-resistant polyurethane foam. During the process of inserting the unit panel between the steel columns, a sealing layer is formed, which effectively prevents the leakage of sound-absorbing ceramic particles inside the cavity 4.

[0039] The above-described embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit the implementation of this utility model. Therefore, any other modifications or equivalent substitutions to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A sound barrier unit panel with impact-resistant composite sound absorption, characterized in that: A cavity comprising a panel, a back panel, and upper and lower crossbeams, wherein a sound absorber is disposed within the cavity, characterized in that: the upper and lower sides of the panel and the back panel are respectively connected to the sides of the crossbeams via an elastic damping structure, wherein the elastic damping structure comprises open-shaped grooves formed by multiple bends respectively disposed on the sides of the crossbeams, the panels, or the back panel, the open-shaped grooves overlapping and interlocking to form a positioning part, wherein an elastic pad and / or an elastic bracket are disposed within the positioning part, which is horizontally positioned at the overlapping part of the open-shaped grooves.

2. The impact-resistant composite sound-absorbing sound barrier unit panel according to claim 1, characterized in that: The cross-section of the opening groove is rectangular. The opening groove of the panel or back plate covers the opening groove of the crossbeam to form the positioning part. The elastic pad is located at the overlapping contact position of the positioning part. The elastic bracket is located inside the positioning part and is used to support the overlapping relative position of the two opening grooves.

3. The impact-resistant composite sound-absorbing sound barrier unit panel according to claim 2, characterized in that: The elastic pad and the elastic bracket are located on both sides of the vertical section of the open groove of the crossbeam. Both the elastic pad and the elastic bracket are I-shaped, with their heads placed in the slots on both sides of the vertical section. The elastic bracket has a symmetrical arc plate in the middle.

4. A sound barrier unit panel with impact-resistant composite sound absorption according to claim 1 or 2, characterized in that: The inner side of the panel is provided with a sound-absorbing liner, and the surfaces of the panel and the sound-absorbing liner are provided with sound-absorbing holes; the inner side of the back panel is provided with a sound-absorbing liner, and both the sound-absorbing liner and the sound-absorbing liner are made of aluminum foam and have a wavy cross-sectional shape.

5. A sound barrier unit panel with impact resistance and composite sound absorption according to claim 1 or 4, characterized in that: Two positioning brackets are symmetrically arranged inside the cavity to restrict the sound absorber. The upper end of the positioning bracket is vertically bent to form a U-shaped head. A groove is formed in the middle of the crossbeam. The U-shaped head is placed in the groove. The bent part of the positioning bracket is positioned with the side wall of the groove of the crossbeam above by a slot and a strip.

6. The impact-resistant composite sound-absorbing sound barrier unit panel according to claim 5, characterized in that: High-strength cement fiberboard is provided on the inner side of both positioning brackets, and sound-absorbing holes are arranged on the surface of the high-strength cement fiberboard near the panel.

7. The impact-resistant composite sound-absorbing sound barrier unit panel according to claim 5, characterized in that: The lower end of the positioning bracket is positioned to the side wall of the crossbeam sink trough below by means of a slot and a strip. A trapezoidal water-blocking plate is installed in the sink trough, and the water-blocking plate is connected to the horizontal baffle at the lower end of the positioning bracket.

8. The impact-resistant composite sound-absorbing sound barrier unit panel according to claim 5, characterized in that: Buffer pads are provided on the outer sides of both the upper and lower crossbeams. The buffer pads are composed of a middle strip and tubes on both sides. The middle strip is connected to the middle of the crossbeam by rivet bolts.

9. The impact-resistant composite sound-absorbing sound barrier unit panel according to claim 1, characterized in that: The sound absorber is granular or fluffy sound-absorbing ceramic particles.

10. A sound barrier unit panel with impact-resistant composite sound absorption according to claim 1 or 9, characterized in that: Vertical enclosures are provided on both sides of the cavity constituting the sound barrier unit panel, and the edges of the vertical enclosures are connected to the upper and lower crossbeams, the front panel, and the back panel respectively by bending and fastening; or the cavity of the sound barrier unit panel is provided with a sealing layer made of polyurethane foam.

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