阅读说明：本技术 一种单腿条缝吸音结构 (Single-leg strip seam sound absorption structure ) 是由 不公告发明人 于 2019-12-20 设计创作，主要内容包括：本发明涉及一种单腿条缝吸音结构,包括多个板条平行排列组合而成的面板,板条之间形成具有狭缝出口的间隙腔,板条的一侧设有固定腿,固定腿用于固定安装板条；本发明单腿条缝吸音结构,单个固定腿的条缝吸音结构提高了吸音的效率,同时减少了材料的用量,降低了生产成本；单个固定腿的设置使得间隙腔的宽度增大,入射声波在吸音腔体内的碰撞和摩擦几率变大,声波耗散增加；间隙腔同时形成一个亥姆霍兹穿孔共振器和抗性消声器,增强吸音效果；单个固定腿作为板条的固定基础,不会对板条在入射声波的影响下的振动形成强限制,利于入射声波的能量通过板条的振动耗散。(The invention relates to a single-leg sound absorption structure with a seam, which comprises a panel formed by parallelly arranging and combining a plurality of laths, wherein a clearance cavity with a slit outlet is formed between the laths, and one side of each lath is provided with a fixing leg which is used for fixedly mounting the lath; according to the single-leg sound absorption structure with the strip seams, the sound absorption efficiency is improved by the single-leg sound absorption structure with the strip seams, the material consumption is reduced, and the production cost is reduced; the arrangement of the single fixing leg enables the width of the gap cavity to be increased, the collision and friction probability of incident sound waves in the sound absorption cavity is increased, and the sound wave dissipation is increased; the gap cavity simultaneously forms a Helmholtz perforated resonator and a reactive muffler, so that the sound absorption effect is enhanced; the single fixing leg is used as a fixing base of the batten, so that strong limitation on vibration of the batten under the influence of incident sound waves is avoided, and the energy of the incident sound waves is favorably dissipated through the vibration of the batten.)

1. The utility model provides a sound structure is inhaled to single leg strip seam which characterized in that: the novel batten connecting structure comprises a panel (100) formed by a plurality of battens (1) in parallel arrangement and combination, a clearance cavity (3) with a slit (31) outlet is formed between the battens (1), each batten (1) comprises a batten main body (11) and fixing legs (12) arranged on one side of the batten main body (11), only a single fixing leg (12) is arranged on each batten (1), and the fixing legs (12) are used for fixedly mounting the battens (1).

2. The single-leg seam sound absorption structure according to claim 1, further comprising a keel (2), wherein the slat (1) is fixedly connected with the keel (2) to form a panel (100); the keel (2) is provided with sockets (21), and the fixing legs (12) are connected with the sockets (21) in a clamping manner.

3. The single-leg slit sound absorbing structure as claimed in claim 1 or 2, wherein both side ends of the strip main body (11) of the strip (1) are provided with a 1-5mm high inward-protruding edge (111) in conformity with the protruding direction of the fixing leg (12).

4. The structure according to claim 3, wherein the fixing leg (12) extends along the length of the strip (1), and the fixing leg (12) has a fixing portion (121) at the end thereof, and the fixing portion (121) is made of a ductile material.

5. The sound absorption structure according to claim 4, wherein a neck-down portion (211) is provided in the insertion opening (21), the fixing leg (12) is inserted into the insertion opening (21), the fixing portion (121) at the insertion opening is broken to form a deformation notch, the strip is pushed along the length direction of the strip, and the fixing portion (121) which is not deformed is clamped to the neck-down portion (211).

6. The single-leg sound absorption structure with the seam as claimed in claim 2, wherein the keel (2) is fixed on the wall (5), the panel (100) is formed by fixedly connecting the batten (1) and the keel (2), and the sound absorption layer (4) is filled between the panel (100) and the wall (5).

7. The single-leg slit sound absorbing structure according to claim 4 or 5, wherein the cross section of the strip (1) is i-shaped, and the cross section of the fixing portion (121) has a shape of one of a single-arc trapezoid, a side-arc trapezoid, a full-arc trapezoid, a side-arc inverted trapezoid, a single-arc inverted trapezoid, a full-arc inverted trapezoid, a straight-side fan, a side-arc concave fan, an arc, a concave arc, a convex arc, a triangle, a convex triangle, a concave triangle, an arc, a regular trapezoid, a side-arc inverted trapezoid, and a fan-shaped inverted triangle.

8. The single-leg slit sound absorbing structure according to claim 1, wherein the bar main body (11) is a flat surface, an arc-shaped arcuate surface, an arc-shaped concave surface, a corrugated surface, a convex ridge surface, or a concave ridge surface.

9. Single leg slot sound absorbing construction according to claim 1, 2, 4, 5 or 6, characterized in that the strip (1) is of aluminium alloy.

10. The single-leg slit sound absorbing structure as claimed in claim 1, 2, 4, 5 or 6, wherein the gap between the strip main bodies (11) of the adjacent slats (1) is 1-20mm, and the length of the fixing leg (12) is 2-10 mm.

11. The single leg slot sound absorbing structure of claim 1, 2, 4, 5 or 6, wherein the area of the slits (31) is 1-40% of the entire area of the panel (100).

Technical Field

The invention relates to the field of building materials, in particular to a single-leg sound absorption structure with a seam.

Background

The sound-absorbing board is an ideal sound-absorbing decorative material, and can be widely used in places such as music halls, movie theaters, recording rooms, studio, monitoring rooms, conference rooms, gymnasiums, exhibition halls, song and dance halls, KTV rooms, family movie and television halls, factories, silent rooms, courts, report halls, audition rooms and the like, and places such as sound-absorbing wall boards and ceiling boards of large public buildings.

At present, the sound-absorbing boards are classified according to structures and generally comprise sound-absorbing wedge sound-absorbing boards, channel wood sound-absorbing boards, perforated sound-absorbing boards and the like. The sound-absorbing wedge is a cone-shaped or wedge-shaped sound absorber manufactured by cutting porous or fibrous materials. The groove wood sound-absorbing board is a structure that the front surface of a medium-density fiberboard is provided with a groove and the back surface of the fiberboard is provided with a round hole, and the groove wood sound-absorbing board not only has all functions of a plane sound-absorbing board, but also can conduct sound waves at different angles through a three-dimensional surface of the groove wood sound-absorbing board. The perforated sound-absorbing board utilizes the characteristic property of the material, namely, a large number of tiny communicated gaps are formed in the material, sound waves enter the material and generate friction with the material to convert sound energy into heat energy. Particularly, a wood sound-absorbing panel produces a particularly excellent sound-absorbing effect on sound waves because the interior of wood contains many fine pores. But the wood is easy to deform and cannot prevent fire in use, and the most applied sound-absorbing plate in the prior art is an aluminum strip seam sound-absorbing plate. The section of the sound-absorbing board is in a shape of pi, and the sound-absorbing board is generally called a double-leg aluminum strip seam sound-absorbing board (such as Chinese patent CN106013660A, a sound-absorbing board and a technical scheme of a mounting method thereof) which is fixed on a wall surface or a ceiling through a leg mounting structure. The sound absorption effect of the double-leg aluminum strip seam sound absorption plate needs to be improved, and the processing difficulty needs to be reduced.

With the development of modern society, the performance requirements of sound absorbing panels are continuously rising, and people hope to obtain a sound absorbing structure with better sound absorbing effect so as to obtain better life quality.

Disclosure of Invention

The invention aims to provide a single-leg sound absorption structure with a seam, which can obtain better sound absorption effect, and the technical scheme is realized as follows:

the utility model provides a single leg strip seam sound-absorbing structure, includes the panel that a plurality of laths parallel arrangement combination formed, form the clearance cavity that has the slit export between the lath, the lath include the strip main part with set up in the fixed leg of strip main part one side only establishes single fixed leg on every lath, fixed leg is used for fixed mounting the lath.

The gap cavities among the battens form a sound-absorbing cavity array, and incident sound waves collide and rub in the sound-absorbing cavity to be converted into heat energy to be consumed. The length direction of the clearance cavity is the extension length direction of the lath.

Only a single fixing leg is provided on each slat, so that all spaces between the fixing legs on two adjacent slats can be used for sound absorption. And for the strip seam sound absorption structure with two or even multiple legs commonly used in the prior art, the cavity between the fixed legs on the same lath can not be used for absorbing sound, thereby reducing the overall sound absorption effect. The width of the clearance cavity is increased due to the arrangement of the single fixing leg, the collision and friction probability of incident sound waves in the sound absorption cavity is increased, and the sound wave dissipation is increased. The strip seam sound absorption structure of the single fixing leg improves the sound absorption efficiency, reduces the material consumption and reduces the production cost.

In addition, the single fixing leg is used as a fixing base of the batten, so that the batten can be fixed on one hand, and strong limitation on vibration of the batten under the influence of incident sound waves is avoided on the other hand, and the energy of the incident sound waves is favorably dissipated through the vibration of the batten. For the sound absorption structure with two legs and even multiple leg slits commonly used in the prior art, the fixing of the batten is too firm, the vibration of the batten under the influence of incident sound waves is limited, and the forced vibration of the batten under the influence of the incident sound waves is beneficial to sound wave dissipation.

Preferably, the panel also comprises a keel, and the batten is fixedly connected with the keel to form a panel; the keel is provided with a socket, and the fixing legs are connected with the socket in a clamping manner. The keel has simple structure and low cost, and is suitable for serving as a fixing base of the batten.

In implementation, the keel is fixed on the wall body, the battens are fixedly connected with the keel to form a panel, and a sound absorption layer is filled between the panel and the wall body. The sound absorption layer type, volume weight, thickness and the like can change the sound absorption performance of the single-leg strip seam sound absorption structure.

The gap cavity forms a Helmholtz perforated resonator, the sound absorption effect is enhanced, the slits are perforations of the Helmholtz perforated resonator, and the gap cavity body is a resonant cavity of the Helmholtz perforated resonator. The entire panel forms an array of helmholtz hole resonators.

The helmholtz effect performs analog calculation on the sound absorption sound wave frequency:

frequency f of the sound wave absorbed mainly₀(in Hz) is:

c-sound velocity, S-perforation sectional area, V-cavity volume, t-perforation depth, delta-perforation end correction;

the clearance cavity simultaneously forms a reactive muffler to enhance the sound absorption effect, the slit is used as a small-size channel of the reactive muffler, and the main body of the clearance cavity is a large-size channel of the reactive muffler. When the cross-sectional area of the large-sized passage and the cross-sectional area of the small-sized passage are increased, the sound transmission loss of the reactive muffler is increased. The entire panel forms an array of reactive mufflers.

Reactive muffler acoustic loss

Wherein:

expansion ratio of reactive muffler, S₁、S₂The sectional area of a silencer channel, tau 1, the sound intensity transmission coefficient, the two sound absorption effects can be simultaneously influenced by changing the width of the strip, and different strip widths are designed through calculation and experiments and aim at sound absorption targets in different frequency ranges.

Further preferably, both side ends of the strip main body of the strip are provided with a 1-5mm high inner convex edge in accordance with the protruding direction of the fixing leg, so that the slit has a certain depth.

As the perforated and reactive muffler small-sized passages of the helmholtz perforated resonator, a slit structure is necessary, and the depth of the slit ensures the formation of the helmholtz perforated resonator and the reactive muffler effect.

To form a clearance cavity with slit exits between the slats, the slits need to have a certain depth, e.g. above 1 mm. When the thickness that adopts the strip main part forms the slit, can increase the material waste of strip main part, the increase of strip main part thickness can reduce the vibration under the incident sound wave influence of strip main part simultaneously, reduces the sound wave dissipation effect.

In an implementation, preferably, the fixing leg extends along a length direction of the slat, and a fixing portion is provided at a distal end of the fixing leg, and the fixing portion is made of a ductile material.

In practice, preferably, a necking part is arranged in the socket. The thin thickness of the slats and the configuration of the keel sockets are not suitable for forming an interference or deformation fit. The fixed leg inserts the socket, the fixed part of socket department is destroyed and is formed the deformation breach, promotes along lath length direction the lath will not take place the fixed part joint of deformation in the throat.

For example, the strip is an aluminum-alloy material, and the retainer portion of the aluminum-alloy material strip is broken through the portion of the constricted portion to form the deformation notch. The batten is pushed along the length direction of the batten, the non-deformed fixing part is clamped in the necking part, and the batten is fixed in the socket.

Optionally, the cross section of the batten is in an i shape, and the cross section of the fixing part is in one of a single-arc trapezoid shape, a side-arc trapezoid shape, a full-arc trapezoid shape, a side-arc inverted trapezoid shape, a single-arc inverted trapezoid shape, a full-arc inverted trapezoid shape, a straight-side fan shape, a side-arc concave fan shape, an arc shape, a concave arc shape, a convex arc shape, a triangle shape, a convex triangle shape, a concave triangle shape, an arc shape, a regular trapezoid shape, a side-arc inverted trapezoid shape and a fan-shaped inverted triangle.

Optionally, the strip body is a plane, an arc-shaped arch surface, an arc-shaped concave surface, a corrugated surface, a convex prism surface or a concave prism surface.

Optionally, the lath is an aluminum alloy, and the keel is an alloy steel.

In practice, optionally, the gap between the strip bodies of adjacent slats is 1-20mm and the length of the fixing leg is 2-10 mm.

In practice, the slit area may alternatively be 1-40% of the total panel area. The value of the area of the slit in the whole panel is the sound transmission rate. When the sound transmission rate is less than 18%, sound absorption is realized mainly in two modes of perforation resonance and resistance noise elimination; when the sound transmission rate is more than 18%, sound absorption is mainly achieved for the sound absorption layer behind the panel (i.e., a perforated sound absorption structure). The optimal sound absorption frequency range of the perforation resonance and resistance noise elimination mode and the perforation sound absorption structure mode is inconsistent, different sound transmission rates are designed through calculation and experiments, and the sound absorption target in different frequency ranges is aimed at.

The single-leg sound absorption structure with the seam provided by the invention has the following beneficial effects:

1. the strip seam sound absorption structure of the single fixing leg improves the sound absorption efficiency, reduces the material consumption and reduces the production cost;

2. the arrangement of the single fixing leg enables the width of the gap cavity to be increased, the collision and friction probability of incident sound waves in the sound absorption cavity is increased, and the sound wave dissipation is increased;

3. the gap cavity simultaneously forms a Helmholtz perforated resonator and a reactive muffler, so that the sound absorption effect is enhanced;

4. the single fixing leg is used as a fixing base of the batten, so that strong limitation on vibration of the batten under the influence of incident sound waves is avoided, and the energy of the incident sound waves is favorably dissipated through the vibration of the batten;

5. the fixing part which is matched and arranged on the keel is designed, so that the installation and the disassembly are convenient;

6. different sound transmission rates can be designed through calculation and experiments, and the sound absorption targets in different frequency ranges can be designed;

7. different widths of the battens can be designed through calculation and experiments, and the sound absorption targets in different frequency ranges can be designed.

Drawings

FIG. 1 is a schematic elevational view of a panel in combination with a runner according to example 1 of the present invention;

FIG. 2 is a schematic view of the back of a panel arranged on a keel according to example 1 of the invention;

FIG. 3 is a schematic view showing the structure of a slat according to example 1 of the present invention;

figure 4 is a schematic view of the keel structure of embodiment 1 of the invention;

fig. 5 is a schematic side view of a keel according to embodiment 1 of the invention;

figure 6 is a schematic view of the installation of the batten over the keel according to embodiment 1 of the invention;

FIG. 7 is a schematic view of a clearance cavity in accordance with embodiment 1 of the present invention;

FIG. 8 is a schematic view of a slat according to example 2 of the present invention;

FIG. 9 is a schematic view of a clearance cavity in accordance with embodiment 2 of the present invention;

FIG. 10 is a schematic view of a single arc trapezoidal fixing portion of the present invention;

FIG. 11 is a side view of a trapezoidal fixing portion of the present invention;

FIG. 12 is a schematic view of a full arc trapezoidal fixing portion of the present invention;

FIG. 13 is a schematic view of a side-arc inverted-trapezoid-shaped fixing portion of the present invention;

FIG. 14 is a schematic view of a single-arc inverted trapezoid fixing portion of the present invention;

FIG. 15 is a schematic view of a full arc inverted trapezoid fixing portion of the present invention;

FIG. 16 is a view of a straight sector shaped retainer portion of the present invention;

FIG. 17 is a side view of a concave sector attachment portion of the present invention;

FIG. 18 is a schematic view of an arc-shaped fixing portion of the present invention;

FIG. 19 is a schematic view of a concave arc-shaped fastening portion of the present invention;

FIG. 20 is a schematic view of a convex arc-shaped fixing portion of the present invention;

FIG. 21 is a schematic view of a triangular fixing portion of the present invention;

FIG. 22 is a schematic view of a convex triangular fixing portion of the present invention;

FIG. 23 is a schematic view of a concave triangular fixing portion of the present invention;

FIG. 24 is a schematic view of a circular arc fixing portion of the present invention;

FIG. 25 is a schematic view of a trapezoidal fixing portion of the present invention;

FIG. 26 is a schematic view of a side-arc inverted-trapezoid-shaped fixing portion of the present invention;

FIG. 27 is a schematic view of a sector-shaped inverted-triangular fixing portion according to the present invention;

FIG. 28 is a graph of sound absorption coefficient comparison between embodiments of the present invention;

reference numerals: panel (100), lath (1), main body (11), inner convex edge (111), fixing leg (12), fixing part (121), deformation notch (122), keel (2), socket (21), necking part (211), clearance cavity (3), slit (31), sound absorbing layer (4), wall (5)

Detailed Description

The technical solution of the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.