A modular, variable sound-absorbing ceiling and its construction method

Abstract

This invention discloses a modular, variable sound-absorbing ceiling and its construction method, comprising a unit column, a first truss, a sound-absorbing ceiling body, a second truss, a connecting structure, and a rotating structure. The connecting structure includes a first truss and a connecting plate. The connecting plate is located inside a side hole, and its inner end is fixedly connected to the inner side wall of the unit column. A top plate is provided at the top of the inner end of the first truss, and a limiting plate is provided at the bottom of the top plate. Both the top plate and the limiting plate are fixedly connected to the first truss at one end. The top plate is engaged with the top of the connecting plate, and the limiting plates are engaged with both sides of the connecting plate. A top hole is opened on the upper surface of the top plate, and a horizontal plate is provided above the top plate. Rivets are fixedly connected to the bottom of both ends of the horizontal plate. A rivet hole is opened on the upper surface of the connecting plate, and the end of the rivet passes through the top hole and engages inside the rivet hole. The modular sound-absorbing ceiling, connected by mortise and tenon joints, can integrate sound-absorbing equipment, sun-shading equipment, and lighting equipment.

Description

Technical Field

[0001] This invention relates to the field of sound-absorbing ceiling technology, and in particular to a modular, variable sound-absorbing ceiling and its construction method. Background Technology

[0002] Performance venues typically require the construction of stages and ceilings. These ceilings usually employ sound-absorbing materials to reduce noise pollution. Furthermore, current ceilings are typically fixed directly to the external steel structure, requiring manual construction using scaffolding.

[0003] Sound control within large-scale architectural spaces has always been a challenging issue. Fixed sound-absorbing facilities are insufficient to meet the diverse needs of different stage effects, a problem primarily stemming from the prevalence of such spaces. Therefore, a modular, variable sound-absorbing ceiling and its construction method are proposed to address this problem. Summary of the Invention

[0004] The purpose of this invention is to provide a modular, variable sound-absorbing ceiling and its construction method, which has the advantages of simple operation and solves the problem of insufficient stage effect of existing sound-absorbing ceilings.

[0005] A modular variable sound-absorbing ceiling and its construction method are disclosed, comprising unit columns, a first truss, a sound-absorbing ceiling body, a second truss, a connecting structure, and a rotating structure.

[0006] The connecting structure includes a first truss and a connecting plate. The connecting plate is located inside the side hole, and its inner end is fixedly connected to the inner side wall of the unit column. The top of the inner end of the first truss is provided with a top plate, and the bottom of the top plate is provided with a limiting plate. Both the top plate and the limiting plate are fixedly connected to the first truss at one end. The top plate is engaged with the top of the connecting plate, and the limiting plate is engaged with both sides of the connecting plate. The top surface of the top plate has a top hole, and a horizontal plate is provided above the top plate. Rivets are fixedly connected to the bottom of both ends of the horizontal plate. The top surface of the connecting plate has a rivet hole, and the end of the rivet passes through the top hole and is engaged inside the rivet hole.

[0007] The rotating structure includes a rotating plate and a mounting frame. The rotating plate is located inside the mounting frame. Rotating holes are opened on both sides of the mounting frame. Rotating shafts are fixed to both sides of the rotating plate and are rotatably connected to the rotating holes. A threaded shaft is fixed to the outer end of the rotating shaft. A circular plate is sleeved on the surface of the threaded shaft. A locking block is fixed to the inner side of the circular plate. A locking groove is opened on the outer side of the mounting frame, and the locking block is engaged in the locking groove. A fastening nut is provided on the outer side of the circular plate and is threadedly connected to the threaded shaft. A limiting block is fixed to the inner sidewall of the circular plate. A limiting groove is opened on the surface of the threaded shaft, and the limiting block is engaged in the limiting groove.

[0008] Furthermore, the cross-section of the unit column is a regular quadrilateral structure, the interior of the unit column is a hollow structure, and the four sides of the unit column are provided with side holes, which are connected to the interior of the unit column.

[0009] Furthermore, the number of first trusses is eight, with two first trusses symmetrically distributed on one side of the unit column, two first trusses forming a group, and four groups of first trusses distributed in a ring on the outer side of the unit column.

[0010] Furthermore, a second truss is provided below the first truss located above, the first truss and the second truss are arranged parallel to each other, the first truss and the second truss are fixedly connected, and the inner end of the second truss is engaged with the surface of the connecting plate.

[0011] Furthermore, each end of the unit column is provided with an end plate, which is engaged with the unit column. The end plate has a threaded hole on its side, and the end of the fastening bolt passes through the side of the unit column and is threadedly connected to the threaded hole.

[0012] Furthermore, a sound sensor is provided inside the unit column, a connecting shaft is provided above the sound sensor, an upper rotating shaft is provided above the connecting shaft, a rope passes through the inner end of the unit column, and the sound sensor, the connecting shaft and the upper rotating shaft are all connected to the rope. The two ends of the rope pass through the two end plates respectively, and the rope extends to the entire component and forms a linkage.

[0013] Furthermore, the sound-absorbing ceiling body is located on one side of the two adjacent second trusses and the first truss, the bottom side of the sound-absorbing ceiling body is fixedly connected to the outer end of the rotating plate, the top of the sound-absorbing ceiling body is attached to the second truss, and the sound-absorbing ceiling body is an integrated structure of sound-absorbing equipment, sunshade equipment and lighting equipment.

[0014] Furthermore, the bottom of the first truss located below has an installation groove, the installation frame is located inside the installation groove, the installation frame is fixedly connected to the inner side wall of the first truss, and the sound-absorbing ceiling body is rotatably connected to the first truss through the rotating plate.

[0015] Furthermore, two rivets are symmetrically distributed at the bottom end of the horizontal plate. The cross-section of the rivet is a convex shape, and the cross-section of the rivet hole is a concave shape. The dimensions of the rivet and the rivet hole are matched.

[0016] Furthermore, the construction method includes the following steps:

[0017] (i) First, the first truss and the second truss can be installed between two adjacent unit columns. At this time, the connecting plate is snapped between the top plate and the limiting plate, and the two rivets at the bottom of the horizontal plate are snapped through the top hole and snapped inside the rivet hole to fix the first truss and the unit column. The outer end of the second truss will be snapped onto the surface of the corresponding connecting plate.

[0018] (II) Then, the sound-absorbing ceiling body is an integrated structure of sound-absorbing equipment, sunshade equipment and lighting equipment. The sound-absorbing ceiling body is rotatably connected to the first truss at the bottom through a rotating plate. The angle of the sound-absorbing ceiling body can be adjusted according to the needs. And by tightening the fastening nut, the clip on the inner side of the circular plate can be engaged in the slot, thereby completing the fixation of the sound-absorbing ceiling body.

[0019] (III) Subsequently, a sound sensor is installed inside the unit column, and rotates according to the source of the sound, driving the connecting shaft to adjust the shape of the ceiling in coordination; the internal ropes connect the entire component into a linkage device, which improves the flexibility of this sound-absorbing ceiling.

[0020] (iv) Finally, when installing this sound-absorbing ceiling, the ropes can be directly passed through the outer steel structure, and the lifting and tensioning can be carried out in batches to achieve the designed shape. The structural state can be adjusted throughout the construction process, the construction safety state can be controlled, and the construction method is simple and efficient.

[0021] Through the above embodiments of the present invention, the modular sound-absorbing ceiling with mortise and tenon joints can integrate sound-absorbing equipment, sunshade equipment and lighting equipment, effectively saving resources and costs; the modular combination method of mortise and tenon joints can achieve rapid installation and disassembly, facilitate transportation, and allow for repeated use, effectively saving construction time and manpower, and improving construction efficiency. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall three-dimensional structure of one embodiment of the present invention;

[0024] Figure 2 This is a half-sectional view of a unit column according to an embodiment of the present invention;

[0025] Figure 3 This is one embodiment of the present invention. Figure 2 Enlarged schematic diagram of the structure at point A in the middle;

[0026] Figure 4This is a connection diagram of a connecting plate, a first truss, and a second truss according to one embodiment of the present invention;

[0027] Figure 5 This is a diagram showing the connection between the horizontal plate and the rivets according to an embodiment of the present invention;

[0028] Figure 6 This is a partial cross-sectional view of one embodiment of the present invention;

[0029] Figure 7 This is a diagram showing the connection between the sound-absorbing ceiling body and the first truss according to an embodiment of the present invention;

[0030] Figure 8 This is a diagram showing the connection between a circular plate and a threaded shaft according to an embodiment of the present invention.

[0031] In the diagram: 1. Rope; 2. End plate; 3. Unit column; 31. Side hole; 4. First truss; 5. Sound-absorbing ceiling body; 6. Second truss; 7. Top plate; 71. Top hole; 8. Limiting plate; 9. Connecting plate; 10. Upper pivot; 11. Connecting shaft; 12. Sound sensor; 13. Fastening bolt; 14. Threaded hole; 15. Horizontal plate; 16. Rivet; 17. Rivet hole; 18. Mounting groove; 19. Rotating plate; 20. Mounting bracket; 201. Rotating hole; 21. Circular plate; 211. Limiting block; 22. Fastening nut; 23. Threaded shaft; 231. Limiting groove; 24. Locking block; 25. Locking groove; 26. Pivot. Detailed Implementation

[0032] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0033] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of the invention described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0034] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing the invention and its embodiments, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to be constructed and operated in a specific orientation.

[0035] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in certain situations to indicate a dependency or connection. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0036] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; 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, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0037] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0038] Please see Figure 1-8 As shown, a modular variable sound-absorbing ceiling and its construction method include unit columns 3, first truss 4, sound-absorbing ceiling body 5, second truss 6, connecting structure and rotating structure;

[0039] The connecting structure includes a first truss 4 and a connecting plate 9. The connecting plate 9 is located inside the side hole 31. The inner end of the connecting plate 9 is fixedly connected to the inner side wall of the unit column 3. The top of the inner end of the first truss 4 is provided with a top plate 7. The bottom of the top plate 7 is provided with a limiting plate 8. Both the top plate 7 and the limiting plate 8 are fixedly connected to the first truss 4 at one end. The top plate 7 is engaged with the top of the connecting plate 9. The limiting plate 8 is engaged with both sides of the connecting plate 9. The top surface of the top plate 7 has a top hole 71. A horizontal plate 15 is provided above the top plate 7. Rivets 16 are fixedly connected to the bottom of both ends of the horizontal plate 15. The upper surface of the connecting plate 9 has a rivet hole 17. The end of the rivet 16 passes through the top hole 71 and is engaged inside the rivet hole 17.

[0040] The rotating structure includes a rotating plate 19 and a mounting bracket 20. The rotating plate 19 is located inside the mounting bracket 20. Rotating holes 201 are opened on both sides of the mounting bracket 20. Rotating shafts 26 are fixedly connected to both sides of the rotating plate 19, and the rotating shafts 26 are rotatably connected to the rotating holes 201. A threaded shaft 23 is fixedly connected to the outer end of the rotating shaft 26. A circular plate 21 is sleeved on the surface of the threaded shaft 23. A locking block 24 is fixedly connected to the inner side of the circular plate 21. A locking groove 25 is opened on the outer side of the mounting bracket 20, and the locking block 24 is engaged inside the locking groove 25. A fastening nut 22 is provided on the outer side of the circular plate 21, and the fastening nut 22 is threadedly connected to the threaded shaft 23. A limiting block 211 is fixedly connected to the inner side wall of the circular plate 21. A limiting groove 231 is opened on the surface of the threaded shaft 23, and the limiting block 211 is engaged inside the limiting groove 231.

[0041] The cross-section of the unit column 3 is a regular quadrilateral structure, and the interior of the unit column 3 is a hollow structure. Side holes 31 are opened on all four sides of the unit column 3, and the side holes 31 communicate with the interior of the unit column 3. There are eight first trusses 4. Two first trusses 4 are symmetrically distributed on one side of the unit column 3, forming a group of two first trusses 4, and four groups of first trusses 4 are arranged in a ring on the outer side of the unit column 3. A second truss 6 is provided below the upper first truss 4. The first trusses 4 and the second truss 6 are arranged parallel to each other, and the first trusses 4 and the second truss 6 are fixedly connected. The inner end of the second truss 6 is engaged with the surface of the connecting plate 9.

[0042] The core of the above structural system is composed of modular units such as the unit column 3, the first truss 4, the second truss 6, and the connecting plate 9. The force distribution is clear and reasonable, and the structure has good stability.

[0043] Both ends of the unit column 3 are provided with end plates 2, which are engaged with the unit column 3. The side of the end plate 2 has a threaded hole 14, and the end of the fastening bolt 13 passes through the side of the unit column 3 and is threadedly connected to the threaded hole 14.

[0044] The end plate 2 and the unit column 3 can be fixed by the fastening bolt 13. The disassembly and assembly of the end plate 2 and the unit column 3 are relatively simple, which is conducive to the repair and maintenance of the internal structure of the unit column 3.

[0045] The unit column 3 is equipped with a sound sensor 12 inside. A connecting shaft 11 is provided above the sound sensor 12, and an upper rotating shaft 10 is provided above the connecting shaft 11. A rope 1 passes through the inner end of the unit column 3. The sound sensor 12, the connecting shaft 11, and the upper rotating shaft 10 are all connected to the rope 1. The two ends of the rope 1 pass through the two end plates 2 respectively, and the rope 1 extends to the entire component and forms a linkage.

[0046] The entire component can be linked together by the rope 1, and can be lifted and tensioned in batches to achieve the designed shape. The structural state can be adjusted throughout the construction process, the construction safety state can be controlled, and the construction method is simple and efficient.

[0047] The sound-absorbing ceiling body 5 is located on one side of the two adjacent second trusses 6 and the first truss 4. The bottom side of the sound-absorbing ceiling body 5 is fixed to the outer end of the rotating plate 19. The top of the sound-absorbing ceiling body 5 is attached to the second truss 6. The sound-absorbing ceiling body 5 is an integrated structure of sound-absorbing equipment, sunshade equipment and lighting equipment.

[0048] The sound-absorbing ceiling body 5 is integrated with the sunshade system, lighting system, and sound absorption system, reducing construction costs and being constructed in one go.

[0049] The bottom of the first truss 4 located below has a mounting groove 18. The mounting bracket 20 is located inside the mounting groove 18. The mounting bracket 20 is fixedly connected to the inner side wall of the first truss 4, and the sound-absorbing ceiling body 5 is rotatably connected to the first truss 4 through the rotating plate 19.

[0050] The rotating structure design of the sound-absorbing ceiling body 5 allows it to be unfolded as needed, making it more flexible to use.

[0051] Two rivets 16 are symmetrically distributed at the bottom of the horizontal plate 15. The cross-section of the rivet 16 is a convex-shaped structure, and the cross-section of the rivet hole 17 is a concave-shaped structure. The dimensions of the rivet 16 and the rivet hole 17 are matched.

[0052] By using mortise and tenon joints to connect different components in unit columns, the entire system does not involve welding and uses only a small number of bolts. Construction, maintenance, and disassembly are precise and convenient, effectively shortening the construction period and saving manpower.

[0053] The construction method includes the following steps:

[0054] (i) First, the first truss 4 and the second truss 6 can be installed between two adjacent unit columns 3. At this time, the connecting plate 9 is engaged between the top plate 7 and the limiting plate 8, and the two rivets 16 at the bottom of the horizontal plate 15 are passed through the top hole 71 and engaged in the rivet hole 17, so as to fix the first truss 4 and the unit column 3, and the outer end of the second truss 6 will be engaged on the surface of the corresponding connecting plate 9.

[0055] (ii) Then, the sound-absorbing ceiling body 5 is an integrated structure of sound-absorbing equipment, sunshade equipment and lighting equipment. The sound-absorbing ceiling body 5 is rotatably connected to the first truss 4 at the bottom through the rotating plate 19. The angle of the sound-absorbing ceiling body 5 can be adjusted according to the needs. And by tightening the fastening nut 22, the clip 24 on the inner side of the circular plate 21 can be engaged in the slot 25, thereby completing the fixation of the sound-absorbing ceiling body 5.

[0056] (III) Subsequently, a sound sensor 12 is installed inside the unit column 3, and rotates according to the source of the sound, driving the connecting shaft 11 to adjust the shape of the ceiling in coordination; the internal rope 1 sets the whole component as a linkage device, which improves the flexibility of this sound-absorbing ceiling.

[0057] (iv) Finally, when installing this sound-absorbing ceiling, the rope 1 can be directly passed through the outer steel structure, and the lifting and tensioning can be carried out in batches to achieve the designed shape. Moreover, the structural state can be adjusted throughout the construction process, the construction safety state can be controlled, and the construction method is simple and efficient.

[0058] The advantages of this invention are:

[0059] 1. This invention integrates sound-absorbing equipment, sunshade equipment, and lighting equipment into a modular sound-absorbing ceiling with mortise and tenon joints, effectively saving resources and costs; the modular combination method with mortise and tenon joints enables rapid installation and disassembly, facilitates transportation, allows for repeated use, effectively saves construction time and manpower, and improves construction efficiency;

[0060] 2. This invention uses telescopic extension to create a linked overall structure, enabling the adjustment of the shape of the sound-absorbing ceiling. This allows the sound-absorbing ceiling to change its shape to adapt to different sound effects and sources, thus better managing indoor sound effects.

[0061] 3. The construction method of the present invention does not require the setting of scaffolding. It only requires the external steel structure as support to lift and tension in batches to achieve the designed shape. Moreover, the structural state can be adjusted and the construction safety state can be controlled throughout the construction process. The construction method is simple and efficient.

[0062] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A modular variable acoustic ceiling, characterized by: The unit column (3), the first truss (4), the sound-absorbing ceiling body (5), the second truss (6), the connecting structure and the rotating structure are included. The connecting structure includes the first truss (4) and the connecting plate (9), the connecting plate (9) is located inside the side hole (31), the inner end of the connecting plate (9) is fixedly connected with the inner side wall of the unit column (3), the inner end top of the first truss (4) is provided with a top plate (7), the bottom of the top plate (7) is provided with a limiting plate (8), and one end of the top plate (7) and the limiting plate (8) is fixedly connected with the first truss (4); the top plate (7) is clamped on the top of the connecting plate (9), the limiting plate (8) is clamped on both sides of the connecting plate (9), the upper surface of the top plate (7) is provided with a top hole (71), the upper surface of the top plate (7) is provided with a horizontal plate (15), the bottom of both ends of the horizontal plate (15) is fixedly connected with a rivet (16), the upper surface of the connecting plate (9) is provided with a rivet hole (17), and the tail end of the rivet (16) penetrates the top hole (71) and is clamped in the rivet hole (17). The rotating structure includes a rotating plate (19) and a mounting bracket (20), the rotating plate (19) is located inside the mounting bracket (20), the mounting bracket (20) is provided with a rotating hole (201) on both sides, the rotating plate (19) is provided with a rotating shaft (26) on both sides, and the rotating shaft (26) is rotatably connected with the rotating hole (201); the outer end of the rotating shaft (26) is fixedly connected with a threaded shaft (23), the surface of the threaded shaft (23) is sleeved with a circular plate (21), the inner side of the circular plate (21) is fixedly connected with a clamping block (24), the outer side of the mounting bracket (20) is provided with a clamping groove (25), and the clamping block (24) is clamped in the clamping groove (25); the outer side of the circular plate (21) is provided with a fastening nut (22), and the fastening nut (22) is threadedly connected with the threaded shaft (23); the inner side wall of the circular plate (21) is fixedly connected with a limiting block (211), the surface of the threaded shaft (23) is provided with a limiting groove (231), and the limiting block (211) is clamped in the limiting groove (231).

2. The modular variable sound-absorbing ceiling according to claim 1, wherein: The cross section of the unit column (3) is a regular quadrilateral structure, the inside of the unit column (3) is a hollow structure, the four sides of the unit column (3) are provided with the side hole (31), and the side hole (31) is communicated with the inside of the unit column (3).

3. The modular variable sound-absorbing ceiling according to claim 1, wherein: The number of the first truss (4) is eight, two first trusses (4) are symmetrically distributed on one side of the unit column (3), two first trusses (4) form a group, and four groups of first trusses (4) are annularly distributed on the outer side of the unit column (3).

4. The modular variable sound-absorbing ceiling according to claim 1, wherein: The first truss (4) is provided below the upper part, the first truss (4) and the second truss (6) are arranged in parallel, the first truss (4) and the second truss (6) are fixedly connected, and the inner end of the second truss (6) is clamped on the surface of the connecting plate (9).

5. The modular variable sound-absorbing ceiling according to claim 1, wherein: Both ends of the unit column (3) are provided with end plates (2), the end plates (2) are clamped and connected with the unit column (3), the side surface of the end plate (2) is provided with a threaded hole (14), and the end of the fastening bolt (13) penetrates through the side surface of the unit column (3) and is threadedly connected with the threaded hole (14).

6. The modular variable sound-absorbing ceiling according to claim 5, wherein: The unit column (3) is internally provided with a sound sensor (12), the sound sensor (12) is provided above with a connecting shaft (11), the connecting shaft (11) is provided above with an upper rotating shaft (10), the inner end of the unit column (3) is penetrated by a rope (1), the sound sensor (12), the connecting shaft (11) and the upper rotating shaft (10) are all connected with the rope (1), and both ends of the rope (1) penetrate through two end plates (2) respectively, and the rope (1) extends to the entire component and forms linkage.

7. The modular variable sound-absorbing ceiling according to claim 1, wherein: The sound-absorbing ceiling body (5) is located on one side of the upper and lower adjacent second trusses (6) and the first truss (4), the bottom end side of the sound-absorbing ceiling body (5) is fixedly connected with the outer end of the rotating plate (19), the top end of the sound-absorbing ceiling body (5) is attached to the second truss (6), and the sound-absorbing ceiling body (5) is an integrated structure of sound-absorbing equipment, sun-shading equipment and lighting equipment.

8. The modular variable sound-absorbing ceiling according to claim 7, wherein: The first truss (4) located below is provided at the bottom with a mounting groove (18), the mounting bracket (20) is located inside the mounting groove (18), the mounting bracket (20) is fixedly connected with the inner side wall of the first truss (4), and the sound-absorbing ceiling body (5) is rotatably connected with the first truss (4) through the rotating plate (19).

9. The modular variable sound-absorbing ceiling according to claim 1, wherein: The bottom end of the horizontal plate (15) is symmetrically provided with two rivets (16), the cross section of the rivet (16) is in a convex letter type structure, the cross section of the rivet hole (17) is in a concave letter type structure, and the size of the rivet (16) matches that of the rivet hole (17).

10. A method of installing a modular variable acoustic ceiling according to any one of claims 1 to 9, wherein: The construction method comprises the following steps: (I), first can be installed between the first truss (4) and the second truss (6) between two adjacent unit columns (3), at this time the connecting plate (9) is engaged between the top plate (7) and the limiting plate (8), and the two rivets (16) at the bottom end of the horizontal plate (15) are engaged in the rivet hole (17) through the top hole (71), so as to fix the first truss (4) and the unit column (3), and the outer end of the second truss (6) is engaged on the surface of the corresponding connecting plate (9); (II), then the sound-absorbing ceiling body (5) is an integrated structure of sound-absorbing equipment, sun-shading equipment and lighting equipment, the sound-absorbing ceiling body (5) is rotatably connected with the first truss (4) at the bottom through the rotating plate (19), the angle of the sound-absorbing ceiling body (5) can be adjusted according to the requirement; and the clamping block (24) on the inner side of the round plate (21) can be clamped in the clamping groove (25) by tightening the fastening nut (22), so as to complete the fixation of the sound-absorbing ceiling body (5); (III), then, the sound sensor (12) is arranged in the unit column (3), and is rotated according to the sound source, driving the connecting shaft (11) to adjust the ceiling shape; the rope (1) is arranged in the whole component to form a linkage facility, improving the flexibility of the sound-absorbing ceiling; (IV), finally, when installing the sound-absorbing ceiling, the rope (1) can be directly passed through the peripheral steel structure, which can be lifted and tensioned in batches, so as to realize the designed shape, and the structure state can be controlled during the whole construction process, the construction safety state can be controlled, and the construction method is simple and efficient.

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