CN211735130U - Multi-spectrum sound barrier unit plate - Google Patents

Abstract

A multi-spectrum sound barrier cell plate comprises a support structure and a sound absorption structure; the support structure is a frame; the sound absorbing structure is sandwiched between the guard plates and captured within the channels of the support structure. In order to improve the sound absorption coefficient and the effective sound absorption frequency band width, a multi-layer perforated plate series composite structure with different apertures, different perforation rates and different cavity depths is adopted. The panel and the micro-perforated plate, the micro-perforated plate and the micro-perforated plate, and the micro-perforated plate and the back plate form a multi-cavity structure. The middle and low frequency noise can consume energy through resonance in the process of passing through the cavity, so that a good effect is achieved, and the frequency band amplitude can be expanded by aiming at the noise with different frequencies in the cavities with different depths. The invention has the characteristics of high integral strength, universal aluminum profile, less specification, convenient installation, flexible selection of sound absorption materials, low cost, wide sound absorption frequency range and the like.

Description

Multi-spectrum sound barrier unit plate

Technical Field

The invention belongs to the field of environmental protection. In particular to a multi-spectrum sound barrier unit plate which is suitable for sound insulation and noise reduction in traffic municipal facilities such as high-speed rails, expressways, overhead composite roads, urban light rails, subways and the like.

Background

With the continuous expansion of the world energy crisis and the environmental pollution area, the development and utilization of renewable energy and various green energy sources to realize sustainable development become the necessary way for human beings to go on in the future. The road sound barrier is widely used for sound insulation and noise reduction in traffic municipal facilities such as high-speed railways, expressways, overhead composite roads, urban light rails, subways and the like.

The high-speed railway has high running speed, the sound barrier is far away from the center of the railway, the high-speed railway has high running speed, the sound barrier is near to the center of the railway (especially on a bridge), and the surface of the sound barrier is greatly subjected to the pneumatic load of the train. The conventional sound barrier cannot attenuate the pneumatic load of the train acting on the surface of the conventional sound barrier, and the huge pneumatic load can cause the sound barrier to swing and shake. After long-term operation, the condition that the connection is loosened and even the structure is damaged and falls off easily occurs, and the driving safety is threatened.

The conventional metal sound barrier is manufactured by adopting a method for improving the structural rigidity actually by adopting a technology introduced by Germany, a panel and a back plate are bent and processed into a rectangular body, and the inner side of the rectangular body is filled with sound absorption cotton, so that the limit of the structural rigidity is insufficient, the manufacturing is complicated, and the metal sound barrier mainly has an effect on middle and high frequency noise.

201621020218.4 provides a damping railway metal sound barrier and its combination device, the cell board is enhancement mode panel, elastic construction, sound absorbing material layer and backplate from the front to the back in proper order, panel, sound absorbing material layer and backplate cartridge set up the socket of elastic construction on the aluminum alloy frame between panel and sound absorbing material layer and between sound absorbing material layer and backplate, the elastic construction cartridge is in the socket. The elastic structure has stronger noise reduction capability, so that the impact load borne by the sound barrier structure is relieved and gentle, the anti-fatigue life of the structure is greatly prolonged, the elastic structure is particularly suitable for the operating characteristics of a high-speed railway, and the passive processing mode that the existing high-speed railway sound barrier system resists the pulsating load by improving the structural rigidity is changed. But the structure is complicated, the cost is very high, the investment cost is high, the structural parts of the aluminum profile need to be specially made, the replacement and maintenance cost is high, the damping structure is greatly used, the stability of the structure is reduced, the installation stability is reduced, and the noise control of multiple frequency bands has defects.

The utility model discloses a CN202370112U utility model discloses a strong sound absorption wide band composite construction, it relates to acoustics noise control and environmental protection technical field. The technical problem that will solve provides one kind and not only has very strong low frequency sound absorption performance, has the sound absorption wall composite construction of very strong medium-high frequency sound absorption performance simultaneously, the strong sound absorption broadband composite construction of low frequency that its adopted, including sound absorption panel and the cotton intermediate layer of glass, the cotton intermediate layer of glass density follow sound absorption panel from little grow inwards. However, the invention has no independent supporting structure, and is technically characterized in that the sound absorption panel and the glass wool interlayer are additionally arranged on a physical structure, and the glass wool has obvious sound absorption effect on low frequency and general sound absorption effect on high frequency only depending on the density of the glass wool, the breadth of the absorption frequency is not very wide, the structure is simple, and the application range is limited.

Disclosure of Invention

In order to solve the problems of complex structure, high cost, poor structural stability, insufficient width of sound absorption frequency band and the like, the invention provides the multi-spectrum sound barrier unit plate which has the characteristics of high integral strength, general aluminum profile, small specification, convenience in installation, flexibility in selecting sound absorption materials, low cost, wide sound absorption frequency range and the like.

A multi-spectrum sound barrier cell plate is composed of a supporting structure, a sound absorption structure, a guard plate, a pinch plate and a buffer cushion. The sound absorption structure is arranged between the guard plate and the pinch plate, and the guard plate and the pinch plate are connected with the supporting structure through bolts.

The sound absorption structure is placed in the first clamping groove 1 on the inner side of the supporting structure; the backplate card is in the fourth draw-in groove 4 of two vertical sides of bearing structure, and the buckle is pressed in the backplate top and is inserted two tip at the fourth draw-in groove, and the blotter is installed in the fifth draw-in groove 5 of aluminium template.

The supporting structure is a parallelogram frame formed by connecting an aluminum template, a middle supporting frame and a corner brace.

And a middle support is arranged at the position of the midspan or the midspan 1/3 and is installed in a second clamping groove of the aluminum template by using a bolt.

The sound absorption structure consists of a micro-perforated plate, sound absorption cotton and hydrophobic cloth. The sound absorption cotton is wrapped by hydrophobic cloth, and microperforated plates are arranged on two sides of the sound absorption cotton wrapped by the hydrophobic cloth.

The guard plate consists of a panel and a back plate. The panel is uniformly provided with 2.5-6 mm holes, and the aperture ratio is 10-25%.

Between the panel and the micro-perforated plate, between the micro-perforated plate and the micro-perforated plate, and between the micro-perforated plate and the back plate, a multiple cavity structure is formed.

In order to improve the sound absorption coefficient and the effective sound absorption frequency band width, a multi-layer perforated plate series composite structure with different apertures, different perforation rates and different cavity depths is adopted. The middle and low frequency noise can consume energy through resonance in the process of passing through the cavity, so that a good effect is achieved, and the frequency band amplitude can be expanded by aiming at the noise with different frequencies in the cavities with different depths.

The perforated panel adopts great perforation rate, reduces the influence to the sound absorption performance, makes the sound wave effectively spread into the cell board in, and the micro-perforated plate principle of inside sound absorbing structure is better to the low frequency noise effect.

The sound absorption cotton has excellent high-frequency sound absorption performance, can effectively absorb medium-high frequency noise, has different effects on medium-high frequency of different frequencies due to the volume weight of different sound absorption cotton, and is formed into a whole by overlapping the sound absorption cotton with different specific volume weights, so that medium-high frequency bands are widened.

The back plate reflects and cuts off the noise passing through the pore plate and the sound absorption cotton. The reflected noise passes through the sound absorbing structure again, so that the noise is reduced to the best effect.

Drawings

FIG. 1 is a front view of the present invention;

FIG. 2 is a side view of the present invention;

FIG. 3 is a rear elevation view of the present invention;

FIG. 4 is a top view of the present invention;

FIG. 5 is a cross-sectional view of the present invention;

FIG. 6 is a horizontal longitudinal partial sectional view of the present invention;

FIG. 7 is a vertical partial sectional view of the present invention;

FIG. 8 is a view of the inventive support structure;

FIG. 9 is a cross-sectional view of the support structure of the present invention;

FIG. 10 is a cross-sectional view of an aluminum profile of the present invention;

FIG. 11 is a side view of the fastener of the present invention;

in the figure, 1-supporting structure, 2-panel, 3-buckle plate, 4-back plate, 5-micro perforated plate, 6-sound absorption cotton, 7-buffer pad, 8-rivet, 9-rubber pad, 11-aluminum template, 12-corner brace, 13-middle supporting frame, 31-rubber tube, 32-fastener, 33-rubber flat pad, 111-first clamping groove, 112-second clamping groove, 113-third clamping groove, 114-fourth clamping groove and 115-fifth clamping groove.

Detailed Description

Fig. 1, 2 and 3 show a multi-spectrum sound barrier cell plate, which is composed of a support structure 1, a sound absorption structure, a guard plate, a buckle plate and a cushion pad.

The supporting structure 1 is a frame body; the sound absorbing structure is placed in the first clamping groove 111 inside the support structure; the guard plate is clamped in the fourth clamping grooves 114 on two longitudinal sides of the supporting structure, the pinch plate 3 is pressed on the panel 2 and inserted into the fourth clamping grooves 114 on two vertical end parts of the supporting structure 1, and the cushion pad 7 is installed in the fifth clamping groove 115 to form a complete sound barrier unit plate.

The supporting structure is a main stress and fixing structure and is also the outline of the unit plate.

The supporting structure is composed of an aluminum profile plate 11, a middle supporting frame 13 and an angle brace 12. The aluminum plate 11 is divided into vertical and horizontal longitudinal sizes according to the required size, and four corners are connected with the aluminum plate 11 by using corner connectors 12 to form a parallelogram frame. The middle support 13 is added at the position 1/3 in the midspan or midspan and is installed in the aluminum profile board clamping groove 112 by using bolts.

The aluminum plate is an aluminum section which is a main stress structure, and the section is concave and is centrosymmetric. The upper portion is first draw-in groove 111 for installing sound absorbing structure, and second draw-in groove 112 and third draw-in groove 113 are used for the installation angle sign indicating number, and there is the fourth draw-in groove 114 of installation buckle and backplate aluminium template both sides, and there is the fifth draw-in groove 115 that is used for installing the blotter bottom the aluminium template. The aluminum template is a long strip structure and is divided into a vertical type (short edge) and a horizontal longitudinal type (long edge) according to the size and the placement position. The buckle plate 3 is installed in the vertical (short side) fourth clamping groove 114, and the protective plate is installed in the horizontal and longitudinal (long side) fourth clamping groove 114.

The middle support 13 is made of aluminum section bar, bears axial pressure and increases the integral stress of the unit plate. The middle support section is H-shaped, and the bottom is provided with a connecting end plate. The width of the second clamping groove is smaller than the distance between the first clamping grooves 111, the second clamping grooves are placed in a frame formed by the aluminum profile plates and are fixed with the second clamping grooves 112 in the horizontal longitudinal direction (long side) through bolts.

The angle sign indicating number 12 is steel or aluminium system right angle spare, and angle sign indicating number 12 is equipped with the connecting hole for the mounting bolt. When the corner connector is installed, the aluminum profile plates on two sides of the corner connector can be fixed by screwing the bolts after the corner connector is placed in advance to form a frame body.

The sound absorption structure consists of a micro-perforated plate 5, sound absorption cotton 6 and hydrophobic cloth. The sound absorption cotton 6 is wrapped by hydrophobic cloth, and microperforated plates 5 are arranged on two sides of the sound absorption cotton 6 wrapped by the hydrophobic cloth to form a composite sound absorption structure.

The sound absorption cotton 6 is wrapped by hydrophobic cloth and then placed in the first clamping groove 111 of the aluminum template, and the micro-perforated plate 5 is installed outside the first clamping groove 111 by rivets. According to requirements and use environment, only a micro-perforated plate or only a sound absorption cotton structure can be selected.

The micro-perforated plate 5 is an aluminum or steel thin plate, the thickness of the micro-perforated plate is 0.6-1.5 mm, holes with the diameter of 0.2-1 mm are uniformly distributed on the surface, and the aperture ratio is 1% -5%.

The sound absorption cotton is divided into different bulk weights and different materials. The glass wool and rock wool composite material is formed by superposing and combining glass wool and rock wool in places where low, medium and high frequencies need to be treated. According to the actual noise frequency, 24-48 Kg/m bulk weight is selected for glass wool and 60-120 Kg/m for rock wool.

The guard plate is an aluminum or galvanized thin plate and consists of a perforated face plate 2 and a non-perforated back plate 4, the section of the guard plate is C-shaped, and the bent edge is provided with a hook. When the aluminum template is installed, the elastic hook is clamped into the bulge of the fourth clamping groove 114 of the aluminum template, so that the movement of the hook is limited, and the protective plate is fixed. The aperture of the perforated panel 2 is 2.5-6 mm, and the perforation rate is 10-25%. When being disassembled and replaced, the utility model can be pushed out from the horizontal direction. In order to increase the rigidity of the guard plate, bulges can be pressed on the surface.

The pinch plate is a 90-degree folded angle long-strip-shaped aluminum profile, and one side of the pinch plate is a corrugated convex plate which is matched with a fourth clamping groove 114 of the aluminum profile plate; the other side is a flat plate, and a rubber tube 31 and a rubber flat pad 33 are arranged. When the guard plate is installed, the buckle plate 32 is installed again, and the guard plate is limited and compressed. The rubber tube arranged on the flat plate side of the pinch plate plays a role in buffering the unit plate during installation.

The buffer pad 7 is made of rubber and is clamped in the fifth clamping groove 115 of the aluminum plate, and vertical deformation and stress between the buffer unit plates are buffered.

Claims (1)

1. A multi-spectrum sound barrier cell board is characterized by comprising a supporting structure and a sound absorption structure; the support structure is a frame; the sound absorption structure is clamped in the middle of the guard plate and clamped inside the clamping groove of the supporting structure; the supporting structure consists of an aluminum template, a middle supporting frame and an angle connector; the aluminum plates are connected through corner connectors to form a quadrilateral frame, and the middle of the quadrilateral frame is connected with a middle support; the sound absorption structure is placed in the first clamping groove on the inner side of the supporting structure; the guard plate is clamped in fourth clamping grooves in two longitudinal side surfaces of the supporting structure, the pinch plates are pressed above the guard plate and inserted into two end parts of the fourth clamping grooves, and the cushion pad is installed in a fifth clamping groove of the aluminum template; the sound absorption structure consists of a micro-perforated plate, sound absorption cotton and hydrophobic cloth; sound absorption cotton wrapped by hydrophobic cloth is clamped between the two side micro-perforated plates; the micro-perforated plate is an aluminum or steel thin plate, the thickness of the micro-perforated plate is 0.6-1.5 mm, holes with the diameter of 0.2-1 mm are uniformly distributed on the surface of the micro-perforated plate, and the aperture ratio is 1% -5%; the protective plate consists of a panel and a back plate, holes with the diameter of 2.5-6 mm are uniformly distributed in the panel, and the aperture ratio of the panel is 10-25%; between the panel and the micro-perforated plate, between the micro-perforated plate and the micro-perforated plate, and between the micro-perforated plate and the back plate, a multiple cavity structure is formed.

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