Shock-resistant composite noise-eliminating sound barrier unit plate

Abstract

The invention 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] The present invention belongs to the technical field of sound barriers, and specifically relates to an impact-resistant composite sound-absorbing sound barrier unit plate. Background Art

[0002] Sound barriers are an effective measure to prevent and control railway noise. The plug-in type sound barriers are composed of steel columns and unit panels. The sound barrier steel columns are arranged alternately along the railway line, and the sound barrier unit panels are inserted between the steel columns to form a sound barrier facility for noise reduction on both sides of the railway.

[0003] The current sound barrier unit panel is composed of a front panel, a back panel and a sound-absorbing material arranged between the two. Its internal structure is simple, and the sound-absorbing material is mostly filled with rock wool fiber. This type of sound-absorbing panel cannot achieve complete sound absorption requirements and is easily affected by moisture, ultraviolet rays and other environmental factors and aged, which will significantly reduce the sound absorption effect of the sound barrier. Secondly, the unit panel connection method mostly adopts mechanical methods 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 loose structural connections and falling off of slat components, which reduces the service life of the sound barrier. Summary of the invention

[0004] The purpose of the present invention is to provide a composite sound barrier unit plate formed by connecting an elastic damping structure. The unit plate has the characteristics of long-term resistance to the impact of high-speed rail pulsating airflow and noise, stable structural connection, and full sound absorption and noise reduction.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is: A sound barrier unit panel with impact resistance and composite sound absorption, characterized in that it includes a cavity formed by a panel, a back panel and upper and lower beams, a sound absorber is arranged in the cavity, and characterized in that the upper and lower sides of the panel and the back panel are respectively connected to the sides of the beams through elastic damping structures, the elastic damping structure includes open grooves formed by multiple bends and respectively arranged on the sides of the beams, the panel or the back panel, the open grooves overlap and snap together to form a positioning part, an elastic pad and / or an elastic bracket are arranged in the positioning part, and are horizontally placed at the overlapping part of the open grooves.

[0006] Additional technical features of the above-mentioned impact-resistant composite sound-absorbing sound barrier unit plate include: The cross section of the open groove is rectangular, the open groove of the panel or back plate covers the open groove of the crossbeam to form the positioning portion, the elastic pad is located at the overlapping contact position of the positioning portion, and the elastic bracket is located inside the positioning portion to support the overlapping relative positions of the two open grooves; ——The elastic pad and the elastic bracket are respectively located on both sides of the vertical section of the open groove of the cross beam. The elastic pad and the elastic bracket are both I-shaped, and their heads are placed in the slots on both sides of the vertical section. The middle part of the elastic bracket has a symmetrical arc plate; ——A sound-absorbing lining is provided on the inner side of the panel, and sound-absorbing holes are arranged on the surfaces of the panel and the sound-absorbing lining; a sound-absorbing lining is provided on the inner side of the back panel, and both the sound-absorbing lining and the sound-absorbing lining are made of foamed aluminum and have a wavy cross-sectional shape; - Two positioning brackets are symmetrically arranged in the cavity for limiting the sound absorber, the upper end of the positioning bracket is vertically bent to form a U-shaped head, a sink groove is formed in the middle of the crossbeam, the U-shaped head is placed in the sink groove, and the bent part of the positioning bracket is positioned with the side wall of the sink groove of the crossbeam above by means of a slot and a strip; ——High-strength cement fiber boards are arranged on the inner sides of the two positioning brackets, and sound-absorbing holes are arranged on the surface of the high-strength cement fiber boards close to the panel side; ——The lower end of the positioning bracket is positioned with the side wall of the beam trough below by means of a slot and a strip, a trapezoidal water baffle is arranged in the trough, and the water baffle is connected with the horizontal baffle at the lower end of the positioning bracket; ——The outer sides of the upper and lower cross beams are provided with cushioning rubber pads, which are composed of a middle slat and tubes on both sides, and the middle slat is connected to the middle part of the cross beam by rivet bolts; ——The sound absorber is granular or fluffy sound-absorbing ceramsite; ——Vertical panels are respectively arranged on both sides of the cavity constituting the sound barrier unit plate, and the edges of the vertical panels are respectively connected to the upper and lower beams, the panel and the back plate by bending and snapping; or a sealing layer composed of polyurethane foam glue is arranged on the side of the cavity constituting the sound barrier unit plate.

[0007] Compared with the prior art, the impact-resistant composite sound-absorbing sound barrier unit panel provided by the present invention has the following advantages: the upper and lower sides of the panel and back panel of the sound barrier unit panel are respectively connected to the side of the beam through an elastic damping structure to form a main frame, ensuring that the panel surface can achieve elastic buffering after being subjected to an impact load, weakening the damage to the unit panel structure caused by the impact, and ensuring that the unit panel fully exerts the sound absorption and noise reduction function; specifically, the elastic damping structure includes an open groove composed of multiple bends, which are respectively arranged on the side of the beam, the panel or the back panel, and the open grooves are overlapped and buckled to form a positioning part, and an elastic pad and / or an elastic bracket are arranged in the positioning part, which is horizontally placed at the overlapping part of the open groove, that is, the elastic pad and / or the elastic bracket are used to achieve sufficient buffering deformation margin at the overlapping connection part, and also achieve the effect of damping and vibration reduction, ensuring that the bent and buckled positioning part is stably connected, and extending the effective service life of the unit panel, with the advantages of compact structure, safety, stability, economy and durability. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is a schematic diagram of the structure of an impact-resistant composite sound-absorbing sound barrier unit panel of the present invention. DETAILED DESCRIPTION

[0009] The structure and working principle of the impact-resistant composite sound-absorbing sound barrier unit plate provided by the present invention are further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0010] In the description of the present invention, unless otherwise specified, the terms "inside / outside", "upper / lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0011] It should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "set / provided with" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0012] like Figure 1 As shown, the impact-resistant composite sound-absorbing sound barrier unit plate structure includes a panel 1, a back panel 2 and a cavity 4 formed by upper and lower beams (31, 32), a sound absorber 41 is arranged in the cavity 4, and the upper and lower side edges of the panel 1 and the back panel 2 are respectively connected to the side edges of the beams (31, 32) through an elastic damping structure 5, the elastic damping structure 5 includes open grooves (51, 52) formed by multiple bends and respectively arranged on the side edges of the panel 1 or the back panel 2 and the side edges of the beams (31, 32), the open grooves (51, 52) overlap and snap together to form a positioning portion, and an elastic pad strip 61 and / or an elastic bracket 62 are arranged in the positioning portion, which are horizontally placed at the overlapping portion of the open grooves (51, 52).

[0013] The working principle is as follows: the main frame of the unit panel is composed of a panel 1, a back panel 2, and upper and lower beams (31, 32); a sound absorber 41 is arranged inside the cavity 4; and since the upper and lower edges of the panel 1 and the back panel 2 are respectively connected to the sides of the upper and lower beams (31, 32) through an elastic damping structure 5, load buffering, structure stabilization, vibration reduction, and noise reduction effects are achieved.

[0014] The elastic damping structure 5 comprises open grooves (51, 52) formed by multiple bends and respectively arranged 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 buckle to form a positioning portion; an elastic pad strip 61 and / or an elastic bracket 62 are arranged in the positioning portion and are horizontally arranged at the overlapping portion of the open grooves (51, 52); that is, the elastic pad strip 61 and the elastic bracket 62 are deformed to alleviate the impact of the pulse airflow and sound waves on the unit plate; the positioning portion with the folded edge buckled is more stably connected, thereby improving the durability of the unit plate; It should be noted that since the elastic pads 61 and the elastic brackets 62 are horizontally placed at the overlapping parts of the open grooves (51, 52), that is, the air pressure changes when the high-speed rail approaches or moves away from the sound barrier, elastic deformations in opposite directions are generated in the positioning parts, and the unit panel exhibits a "breathing" effect. When approaching, sound and airflow enter the unit panel cavity 4, which more effectively absorbs sound and reduces noise; when moving away, the unit panel panel 1 discharges the airflow and pressure, reducing the loss of the unit panel structure caused by load impact.

[0015] In the sound barrier unit plate structure constituting the above-mentioned impact-resistant composite sound-absorbing structure, - In one embodiment, the cross section of the above-mentioned open groove (51, 52) is rectangular, that is, the open groove (51, 52) is formed by secondary bending of the edge, and the rectangular structure is consistent with the shape of the unit plate, which is convenient for socket installation; The open groove 51 of the panel 1 or the back panel 2 covers the open groove 52 of the beam to form a positioning portion, that is, the panel 1 and the back panel 2 cover the side of the cross beam (31, 32) from the outside, and the appearance is more closed, preventing dust, running water, etc. from invading the interior of the unit board; The elastic pad strip 61 is located at the overlapping contact position of the positioning part (pressing support), and the elastic bracket 62 is located inside the positioning part, and is used to support the overlapping relative position of the two open-type grooves (51, 52) (spatial support), that is, the two can achieve two damping and buffering effects in opposite directions, and can effectively reduce vibration and noise when the high-speed rail approaches or moves away; ——Preferably, the elastic pad strip 61 and the elastic bracket 62 are respectively located on both sides of the vertical section of the open groove 52 of the cross beam (31, 32), and the elastic pad strip 61 and the elastic bracket 62 are both I-shaped, and their heads are placed in the slots 60 on both sides of the vertical section, that is, they are arranged horizontally for easy processing and manufacturing. The slots 60 on both sides of the vertical section can provide effective support and positioning for the elastic pad strip 61 and the elastic bracket 62. In order to enhance the structural stability of the elastic bracket 62, it is made of metal profiles, and a symmetrical arc plate 63 is preferably arranged in the middle to have better rebound stop performance; ——Furthermore, a sound-absorbing lining plate 71 is provided on the inner side of the above-mentioned panel 1, and sound-absorbing holes 10 are arranged on the surfaces of the panel 1 and the sound-absorbing lining plate 71; a sound-absorbing lining plate 72 is provided on the inner side of the back plate 2, that is, a double-layer composite sound-absorbing system is formed in the unit plate, which can fully and completely reduce noise. The sound-absorbing lining plate 71 and the sound-absorbing lining plate 72 are both made of foam aluminum and have a wavy cross-sectional shape. On the basis of absorbing sound waves, the corrugated surface can effectively reflect and scatter sound wave energy, and can also elastically support the panel 1 and the back plate 2 to reduce the impact of load impact; - Preferably, two positioning brackets 8 for limiting the sound absorber 41 are symmetrically arranged in the cavity 4, the upper end of the positioning bracket 8 is vertically bent to form a U-shaped head 81, and a sink groove (301, 302) is formed in the middle of the cross beam (31, 32), and the U-shaped head 81 is placed in the sink groove 601. The bent part of the positioning bracket 8 and the side wall of the sink groove of the upper cross beam are positioned by a slot and a strip 80, that is, the positioning bracket 8 is used to facilitate the installation of the sound absorber 41, the sound absorber 41 does not move during operation, the structural form is stable and not scattered, and it is conducive to giving full play to the sound elimination function; ——Furthermore, a high-strength cement fiber board 82 is arranged inside the two positioning brackets 8, and sound-absorbing holes 10 are arranged on the surface of the high-strength cement fiber board 82 close to the panel 1, so as to enhance the structural strength of the positioning bracket 8 and the protection effect of the internal sound-absorbing body 41; ——The lower end of the positioning bracket 8 is positioned with the side wall of the lower beam sink 302 by means of a slot and a strip 80. A trapezoidal water barrier 83 is arranged in the sink 302. The water barrier 83 is connected to the horizontal baffle 84 at the lower end of the positioning bracket 8. That is, the overall height of the unit plate cavity 4 is raised by the water barrier 83, which is convenient for bottom drainage and prevents water from entering the cavity 4. - Preferably, a buffer rubber pad 9 is provided on the outer side of the upper and lower cross beams (31, 32), the buffer rubber pad 9 is composed of a middle strip 91 and a tube body 92 on both sides, the middle strip 91 is connected to the middle part of the cross beam (31, 32) by a rivet bolt 93, the buffer rubber pad 9 is made of elastic rubber, and plays a role of sealing positioning and buffering protection when the unit board is installed as a whole; ——As a preferred embodiment, the sound absorber 41 is a granular or fluffy sound-absorbing ceramsite, which is generally made by sintering recycled construction waste, and has irregular micropores on the surface. It not only has a good sound absorption effect but also has a strong surface stress. Its sound absorption performance has a longer service life than conventional rock wool; When the high-speed railway is close to the sound barrier, the impact air pressure and noise enter the unit panel, and the sound-absorbing ceramsite is dispersed by the impact and fills the entire cavity (such as Figure 1As shown in the figure, the granular ceramsite collides and rubs against each other to consume energy, effectively converting the high-speed impact into mechanical energy and heat energy for consumption, achieving the effect of complete sound absorption and noise reduction. The high-speed rail is far away from the sound barrier, and the granular ceramsite is restored to gather at the bottom of the cavity 4. The space of the sound-absorbing ceramsite in the cavity 4 preferably accounts for 1 / 2 to 2 / 3; ——In order to improve the sealing performance of the cavity 4 inside the unit panel, vertical enclosures are respectively arranged on both sides of the cavity 4 constituting the sound barrier unit panel, and the edges of the vertical enclosures are respectively connected to the upper and lower cross beams (31, 32), the panel 1 and the back panel 2 by bending and snapping. As an equivalent alternative, the side of the cavity 4 constituting the sound barrier unit panel can also be sealed with fire-proof polyurethane foam glue. When the unit panel is inserted between the steel columns, a sealing layer is formed to effectively prevent the leakage of the sound-absorbing expanded clay in the cavity 4.

[0016] The above-described embodiments are only used to illustrate the technical solution of the present invention, and are not limiting conditions for the implementation of the present invention. Therefore, any other modifications or equivalent replacements of configuration dimensions and internal structures made to the technical solution of the present invention, as long as they do not depart from the spirit and scope of the technical solution of the present invention, should be included in the scope of the claims of the present invention.

Claims

1. An impact-resistant composite sound-absorbing sound barrier unit plate, characterized in that: The invention relates to a cavity consisting of a panel, a back panel and upper and lower beams, wherein a sound absorber is arranged in the cavity, and is characterized in that: the upper and lower sides of the panel and the back panel are respectively connected to the sides of the beams through elastic damping structures, and the elastic damping structures include open grooves formed by multiple bends and respectively arranged on the sides of the beams, the panels or the back panel, the open grooves overlap and snap together to form a positioning portion, and an elastic pad and / or an elastic bracket are arranged in the positioning portion and are horizontally placed at the overlapping parts of the open grooves.

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

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

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

5. The impact-resistant composite sound-absorbing sound barrier unit plate according to claim 1 or 4, characterized in that: Two positioning brackets for limiting the sound absorber are symmetrically arranged in the cavity, the upper end of the positioning bracket is vertically bent to form a U-shaped head, a sink groove is formed in the middle of the beam, the U-shaped head is placed in the sink groove, and the bent part of the positioning bracket is positioned with the side wall of the sink groove of the upper beam by means of a slot and a strip.

6. The impact-resistant composite sound-absorbing sound barrier unit plate according to claim 5 is characterized by: High-strength cement fiber boards are arranged on the inner sides of the two positioning brackets, and sound-absorbing holes are arranged on the surface of the high-strength cement fiber boards close to the panel.

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

8. The impact-resistant composite sound-absorbing sound barrier unit plate according to claim 5 is characterized by: Buffer rubber pads are arranged on the outer sides of the upper and lower cross beams. The buffer rubber pads are composed of a middle slat and tubes on both sides. The middle slat is connected to the middle part of the cross beam by rivet bolts.

9. The impact-resistant composite sound-absorbing sound barrier unit plate according to claim 1 is characterized by: The sound absorber is granular or fluffy sound absorbing ceramsite.

10. The impact-resistant composite sound-absorbing sound barrier unit plate according to claim 1 or 9, characterized in that: Vertical panels are respectively arranged on both sides of the cavity constituting the sound barrier unit plate, and the edges of the vertical panels are respectively connected to the upper and lower beams, the panel and the back plate by bending and snapping; or a sealing layer composed of polyurethane foam glue is arranged on the side of the cavity constituting the sound barrier unit plate.

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