A concert hall central baffle and a construction method thereof

Abstract

The application discloses a concert hall central sound reflection plate and a construction method thereof. The sound reflection plate comprises a light steel net rack, a connecting piece, a sound reflection main plate, a lamp strip buckle, a lamp strip, a lamp holder and a lamp body. The light steel net rack comprises a main beam and a secondary beam. The main beam and the secondary beam are arranged in a longitudinal and transverse staggered mode. The connecting piece is arranged at the bottom of the light steel net rack and connected to the light steel net rack. The sound reflection main plate is connected to the connecting piece. The lamp strip buckle is arranged on the main beam and / or the secondary beam. The lamp strip buckle and the connecting piece are arranged on two sides of the light steel net rack along the thickness direction. The lamp strip is arranged on the lamp strip buckle. The lamp holder is arranged on the light steel net rack. The lamp holder is arranged on the side of the light steel net rack away from the connecting piece. At least part of the lamp body is arranged on the lamp holder. The central sound reflection plate has a multi-layer structure design, realizes function integration, facilitates assembly of the lamp strip, the sound reflection main plate and the lamp body and the like, and improves the assembly efficiency of the central sound reflection plate.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of theatre building construction, in particular to a concert hall central reflector plate and a construction method thereof. BACKGROUND

[0002] The central lifting type reflector plate is an important acoustic reflector of the concert hall. The central reflector plate is set to improve the mutual hearing between the performers on the stage, and to form appropriate, uniform and hierarchical early reflected sound together with the ceiling in the concert hall. In modern architectural acoustic design, the central reflector plate is a core component with acoustic reflection and decoration functions. The structural innovation of the central reflector plate directly affects the uniformity of the space sound field and the visual aesthetic effect. The traditional reflector plate is fixedly installed by using a single plate (such as a gypsum board or a metal plate). The traditional reflector plate has low functional integration, poor structural adaptability and high maintenance cost. For example, the lighting system needs to be independently installed, which increases the construction complexity and space occupation. The single layer plate is difficult to realize the collaborative arrangement of the acoustic reflection surface and the lamp. The lack of modular design requires the whole to be replaced when a local part is damaged.

[0003] Therefore, the present application is provided. SUMMARY

[0004] To solve one of the above technical problems, the present application provides a concert hall central reflector plate and a construction method thereof.

[0005] The present application provides the following technical solutions:

[0006] In a first aspect, the present application provides a concert hall central reflector plate, comprising:

[0007] A light steel net rack, the light steel net rack comprising a main beam and a secondary beam, the main beam and the secondary beam being arranged in a longitudinal and transverse manner;

[0008] A connecting piece, the connecting piece being located at the bottom of the light steel net rack, and the connecting piece being connected to the light steel net rack;

[0009] A reflector main plate, the reflector main plate being connected to the connecting piece;

[0010] A light strip buckle, the light strip buckle being arranged on the main beam and / or the secondary beam, the light strip buckle and the connecting piece being arranged on two sides of the light steel net rack along the thickness direction;

[0011] A light bar, the light bar being arranged on the light strip buckle;

[0012] A lamp holder, the lamp holder being arranged on the light steel net rack, the lamp holder being located on a side of the light steel net rack away from the connecting piece;

[0013] A lamp body, at least part of the lamp body being arranged on the lamp holder.

[0014] Optionally, the main beams are continuous beam bodies.

[0015] The secondary beams comprise a plurality of secondary beam segments, at least some of the secondary beam segments being located between two adjacent main beams and connecting the main beams.

[0016] Optionally, the main beams comprise a plurality of main beam segments.

[0017] One of the two adjacent main beam segments has two flat plates arranged at intervals at the end thereof, and the other has two vertical plates arranged at intervals at the end thereof, the two vertical plates extending over and closing the respective side openings, and the vertical plates and the flat plates being welded and fixed.

[0018] Optionally, the light strip fastener comprises a top strip and side strips arranged at both sides of the top strip.

[0019] The top strip covers the upper surface of the main beam or the secondary beam.

[0020] The side strips are arranged at both sides of the main beam or the secondary beam.

[0021] The side strips form a receiving cavity and a bottom opening communicating with the receiving cavity with the main beam or the secondary beam, and the bottom opening faces the sound reflection main plate.

[0022] The light strip is arranged in the receiving cavity and connected to the light strip fastener.

[0023] Optionally, the top strip extends out of the main beam or the secondary beam at both sides thereof.

[0024] The light strip is connected to the part of the top strip extending out of the main beam or the secondary beam.

[0025] Optionally, the light frame comprises a vertical column, a sleeve and a light pole.

[0026] The vertical column is connected to the light steel net frame.

[0027] The sleeve is arranged at the top end of the vertical column.

[0028] The light pole is arranged in the sleeve, and the light pole and the light steel net frame have a gap, and at least part of the light body is arranged on the light pole.

[0029] Optionally, the central sound reflection plate of the concert hall comprises a hanging seat, and the hanging seat has a connecting body and a hanging lug connected to the connecting body.

[0030] The main beam or the secondary beam comprises a top wall, a bottom wall and a side wall connecting the top wall and the bottom wall, the top wall, the bottom wall and the side wall enclosing a cavity, and the bottom wall has a fixing opening communicating with the cavity.

[0031] The connecting body extends through the top wall and the cavity to the fixing opening;

[0032] The connecting body and the bottom wall are welded and fixed at the fixing opening.

[0033] In a second aspect, the embodiments of the present application provide a construction method of the central sound reflection plate of the music hall, comprising:

[0034] Step S1, pre-assembling each structural member of the central sound reflection plate of the music hall in a factory, and after the pre-assembly is completed, transferring each structural member to a site;

[0035] Step S2, welding the main beams and the secondary beams to form a light steel grid at the site;

[0036] Step S3, assembling a lamp holder, a lamp strip fastener and a hanging seat on the light steel grid;

[0037] Step S4, assembling a connecting member on the light steel grid, and installing a glass panel on the connecting member;

[0038] Step S5, installing a lamp strip on the lamp strip fastener, and installing a lamp body on the lamp holder.

[0039] Optionally, in step S2, each main beam and secondary beam is welded in sequence from the middle to the periphery;

[0040] In step S4, a threaded sleeve is welded at the bottom of the light steel grid, a threaded rod of the connecting member is threadedly connected to the threaded sleeve, and the glass panel is fixed to the corresponding connecting member.

[0041] Optionally, in step S3, the step of assembling the lamp holder comprises welding a stand to the light steel grid, arranging a sleeve at the top end of the stand, and threading a lamp pole through the sleeve;

[0042] In step S3, the step of assembling the hanging seat comprises threading a connecting body of the hanging seat through a top wall and a cavity of a main beam or a secondary beam, so that a bottom end of the connecting body extends to a fixing opening of a bottom wall, and the connecting body and the bottom wall are welded and fixed at the fixing opening.

[0043] By adopting the above technical solution, the present application has the following beneficial effects:

[0044] The central sound reflection plate of the music hall of the present application is designed as a multi-layer structure, realizes functional integration, facilitates the assembly of the lamp strip, the sound reflection main plate and the lamp body and the like, and improves the assembly efficiency of the central sound reflection plate of the music hall. BRIEF DESCRIPTION OF DRAWINGS

[0045] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the application and together with the description, serve to explain the application. Obviously, the drawings shown are only a few embodiments and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0046] Figure 1 A top view of a central reflector plate of a concert hall according to an embodiment of the application is shown;

[0047] Figure 2 A top view of a partial structure of a central reflector plate of a concert hall according to an embodiment of the application is shown;

[0048] Figure 3 A schematic view of a cooperation structure of a light steel grid, a light strip fastener, a light stand, a connector and a main reflector plate in a central reflector plate of a concert hall according to an embodiment of the application is shown;

[0049] Figure 4 A schematic view of a cooperation structure of a light steel grid and a connector in a central reflector plate of a concert hall according to an embodiment of the application is shown.

[0050] Figure 5 A schematic view of a cooperation structure of adjacent main beam segments in a central reflector plate of a concert hall according to an embodiment of the application is shown;

[0051] Figure 6 A schematic view of a cooperation structure of adjacent main beam segments in a central reflector plate of a concert hall according to an embodiment of the application is shown;

[0052] Figure 7 A schematic view of a cooperation structure of a light stand, a light steel grid and a light strip fastener in a central reflector plate of a concert hall according to an embodiment of the application is shown;

[0053] Figure 8 A schematic view of a cooperation structure of a light stand, a light steel grid and a light strip fastener in a central reflector plate of a concert hall according to an embodiment of the application is shown;

[0054] Figure 9 A schematic view of a cooperation structure of a light stand, a light steel grid and a light strip fastener in a central reflector plate of a concert hall according to an embodiment of the application is shown;

[0055] In the diagram: 1. Light steel space frame; 11. Main beam; 11a. Top wall; 11b. Bottom wall; 11c. Side wall; 111. Main beam segment; 1111. Flat plate; 1112. Vertical plate; 12. Secondary beam; 13. Threaded sleeve; 2. Connector; 3. Reflector main plate; 31. Circular glass plate; 4. Light strip buckle; 41. Top strip; 42. Side strip; 5. Light strip; 6. Light frame; 61. Column; 62. Sleeve; 7. Light body; 8. Hanger; 81. Connector; 82. Lifting lug; 9. Connecting rod; 10. Edge sealing ring plate. Detailed Implementation

[0056] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0057] In the description of this invention, it should be noted that the terms "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0058] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0059] like Figures 1 to 9 As shown, this application embodiment provides a central acoustic reflector for a concert hall, comprising: a light steel frame 1, connecting parts 2, an acoustic reflector main board 3, LED strip fasteners 4, LED strips 5, a lamp holder 6, and a lamp body 7. The light steel frame 1 includes main beams 11 and secondary beams 12, which are arranged in a crisscross pattern. The connecting parts 2 are located at the bottom of the light steel frame 1 and connected to it. The acoustic reflector main board 3 is connected to the connecting parts 2. The LED strip fasteners 4 are disposed on the main beams 11 and / or the secondary beams 12. The LED strip fasteners 4 and the connecting parts 2 are respectively disposed on both sides of the light steel frame 1 along its thickness direction. The LED strips 5 are disposed on the LED strip fasteners 4. The lamp holder 6 is disposed on the light steel frame 1, located on the side of the light steel frame 1 opposite to the connecting parts 2. At least a portion of the lamp body 7 is disposed on the lamp holder 6. Figure 3As shown, the concert hall central reflector plate of the present application is designed as a multi-layer structure, which realizes function integration, facilitates the assembly of the lamp strip 5, the reflector main plate 3, the lamp body 7 and other structures, and improves the assembly efficiency of the concert hall central reflector plate.

[0060] In some possible embodiments, as shown in Figure 2 As shown, the main beam 11 is a continuous beam body, and the secondary beam 12 includes a plurality of secondary beam segments, at least part of the secondary beam segments of the secondary beam 12 being located between and connecting the adjacent two main beams 11. The main beam 11 is a continuous beam body without intermediate discontinuous parts, which is conducive to improving the structural strength of the light steel grid 1.

[0061] The reflector main plate 3 of the concert hall central reflector plate can include a plurality of circular glass plates 31, each of which is formed by splicing a plurality of small glass pieces. Each small glass piece is spliced to form a circular glass plate, and there can be a small gap between adjacent small glass pieces. Each small glass piece is mounted on a corresponding adapter 2. For example, the adapter 2 is located at the splicing vertex of the plurality of small glass pieces, as shown in Figure 3 and Figure 4 As shown, the adapter 2 has a plurality of claw arms, each of which extends to the corner of a different small glass piece and fixes the small glass piece through a fastener. The fastener can be a bolt.

[0062] The concert hall central reflector plate further includes a plurality of edge sealing ring plates 10, each of which is welded to the light steel grid 1, each of which is located above the corresponding circular glass plate 31 and coaxial with the corresponding circular glass plate 31. The design of the edge sealing ring plate 10 has an aesthetic effect, and is also used to connect different main beams 11 and secondary beams 12, which is conducive to improving the structural strength of the light steel grid 1. For example, the edge sealing ring plate 10 is connected to the end of part of the main beam 11 or the secondary beam 12, so that the light steel grid 1 is aesthetically pleasing in appearance, and the ends of the plurality of main beams 11 or secondary beams 12 are connected and fixed, thereby enhancing the structural strength of the light steel grid 1.

[0063] Among them, the edge sealing ring plate 10 can be an integral ring plate. The edge sealing ring plate 10 can also include a plurality of circular arc segments, each of which is welded to a corresponding part of the light steel grid 1, and each of which is welded to form a complete edge sealing ring plate 10.

[0064] In some possible embodiments, the concert hall central reflector plate further includes a connecting rod 9 located in the triangular gap formed between the adjacent two edge sealing ring plates 10, and the connecting rod 9 is welded to the two edge sealing ring plates 10 at both ends. Part of the lamp body 7 can be provided on the connecting rod 9. The lamp body located on the connecting rod 9 avoids the glass plate and can directly project light downward.

[0065] In some possible embodiments, as shown in Figure 5 andFigure 6 As shown, the main beam 11 comprises a plurality of main beam segments 111, among two adjacent main beam segments 111, one end of one main beam segment 111 is provided with two spaced apart flat plates 1111, and the two flat plates 1111 form a side opening therebetween, and the other end of the other main beam segment 111 is provided with two spaced apart vertical plates 1112, and the two vertical plates 1112 extend over and close the corresponding side openings, respectively, and the vertical plates 1112 and the flat plates 1111 are welded and fixed. Multiple weldings are performed between adjacent main beam segments 111, so that the welding structure between the main beam segments 111 has high structural strength and is not easy to break.

[0066] As shown, Figure 6 the upper and lower flat plates 1111 of one main beam segment 111 extend out, and a web plate is connected between the upper and lower flat plates 1111, and the left and right vertical plates 1112 of the other main beam segment 111 extend out, and a second web plate is connected between the left and right vertical plates 1112, and eight splicing seams are formed between the upper and lower flat plates 1111 and the left and right vertical plates 1112, and the eight splicing seams are all welded, thereby enhancing the structural strength of the main beam 11 at the splicing positions.

[0067] In some possible embodiments, as shown, Figure 3 the light strip 4 comprises a top strip 41 and side strips 42 located on both sides of the top strip 41. The top strip 41 covers the upper surface of the main beam 11 or the secondary beam 12, and the side strips 42 are located on both sides of the main beam 11 or the secondary beam 12, and the side strips 42 form a containing cavity and a bottom opening communicating with the containing cavity with the main beam 11 or the secondary beam 12, and the bottom opening faces the sound-reflecting main plate 3, and the light strip is arranged in the containing cavity and connected to the light strip fastener 4. The light emitted by the light strip can be incident on the transparent sound-reflecting main plate 3.

[0068] In some possible embodiments, as shown, Figure 3 the top strip 41 extends out of the main beam 11 or the secondary beam 12 along the width direction, and the light strip 5 is connected to the part of the top strip 41 extending out of the main beam 11 or the secondary beam 12. The top of the main beam 11 and the secondary beam 12 can each be provided with the light strip fastener 4, and the light strip fasteners 4 of the main beam 11 and the secondary beam 12 form a reentrant corner at the position where the main beam 11 and the secondary beam 12 are staggered, and the gap at the reentrant corner can be fixed by electric welding. The light strip fastener 4 is a light steel structure and can be welded to the light steel space truss 1.

[0069] In some possible embodiments, as shown, Figure 3 the lamp holder 6 comprises a stand 61, a sleeve 62 and a lamp pole, the stand 61 is connected to the light steel space truss 1, the sleeve 62 is arranged at the top end of the stand 61, and the lamp pole is arranged in the sleeve 62, and the lamp pole and the light steel space truss 1 have a gap, and at least part of the lamp body 7 is arranged on the lamp pole.

[0070] In this implementation scheme, the light pole is roughly parallel to the light steel grid frame 1, and the light body 7 can be easily installed on the light pole. A clearance opening can be provided on the top strip 41, and the column 61 can pass through the clearance opening and fit against the main beam 11 or the secondary beam 12, thereby facilitating welding and fixing to the main beam 11 or the secondary beam 12.

[0071] In some possible implementations, such as Figure 1 , Figure 8 and Figure 9 As shown, the central acoustic reflector in the concert hall includes a hanging base 8, which has a connecting body 81 and a lug 82 connecting the connecting body 81. The main beam 11 or secondary beam 12 includes a top wall 11a, a bottom wall 11b, and a side wall 11c connecting the top wall 11a and the bottom wall 11b. The top wall 11a, bottom wall 11b, and side wall 11c enclose a cavity. The bottom wall 11b has a fixing opening communicating with the cavity. The connecting body 81 extends through the top wall 11a and the cavity to the fixing opening. The connecting body 81 and the bottom wall 11b are welded and fixed at the fixing opening. The connecting body 81 and the top wall 11a can also be welded and fixed. The hanging base 8 is completely inserted into the main beam 11 or secondary beam 12 and connected to the main beam 11 or secondary beam 12. The entire hanging base 8 forms an integral structure with the light steel grid frame 1, which can provide sufficient support. A reinforcing rib is provided on the inner side of the main beam 11 or the secondary beam 12 near the hanger 8. The reinforcing rib is connected to the inner wall of the main beam 11 or the secondary beam 12 to enhance the local structural strength and prevent the beam from deforming under stress.

[0072] This application also provides a construction method for the aforementioned central acoustic reflector in the concert hall, including:

[0073] Step S1: Pre-assemble the structural components of the central acoustic reflector in the concert hall at the factory, and after the pre-assembly is completed, transport the structural components to the site.

[0074] In the factory, the structural components of the central acoustic reflector of the concert hall are pre-assembled. Spot welding can be used between the components to verify the feasibility of the assembly structure. After that, the components can be disassembled and sent to the site to ensure that the assembly can be completed smoothly on site. In this step, the structural components, such as the main beam 11 and the secondary beam 12, can be numbered and treated with fluorocarbon spraying.

[0075] Step S2: Weld the main beam 11 and the secondary beam 12 on site to form a light steel space frame 1;

[0076] Step S3: Assemble the lamp holder 6, the light strip buckle 4, and the hanging bracket 8 on the light steel space frame 1;

[0077] Step S4: Assemble the connector 2 on the light steel frame 1, and install the glass panel on the connector 2;

[0078] Step S5: Install the light strip 5 onto the light strip buckle 4, and install the light body 7 onto the light frame 6.

[0079] Optionally, in step S2, each of the main beams 11 and the secondary beams 12 is welded in sequence from the middle to the periphery;

[0080] In step S4, a threaded sleeve 13 is welded at the bottom of the light steel truss 1, and the threaded rod of the adapter 2 is screwed to the threaded sleeve 13, and the glass panel is fixed to the corresponding adapter 2.

[0081] The adapter 2 has a plurality of claw arms, each of which extends to the corner of a different small glass sheet, and the small glass sheet is fastened by a fastener, which can be a bolt.

[0082] Optionally, in step S3, the step of assembling the lamp holder 6 includes welding the stand 61 to the light steel truss 1, arranging the sleeve 62 at the top end of the stand 61, and threading the lamp rod through the sleeve 62. Then the lamp body 7 can be fixed to the lamp rod.

[0083] In step S3, the step of assembling the hanging seat 8 includes threading the connecting body 81 of the hanging seat 8 through the top wall 11a and the cavity of the main beam 11 or the secondary beam 12, so that the bottom end of the connecting body 81 extends to the fixing port of the bottom wall 11b, and the connecting body 81 is welded and fixed with the bottom wall 11b at the fixing port, that is, plug welding is used. At the same time, the top wall 11a and the connecting body 81 can also be welded and fixed at the top wall 11a, such as fillet welding.

[0084] It should be noted that the determination of the inclination angle is also included before step S1. In the design process, geometric acoustic reflection sound path tracking is first used, combined with Odeon sound field simulation to predict the reflection sound arrival time and coverage. When adjusting the coverage of the reflection plate, it is found that when the reflection plate is inclined to the audience side, it helps to transmit the sound from the stage to the audience, and eliminates the potential echo that may be formed by the sound transmitted to the stage after being reflected twice by the stage balcony back wall. After research analysis and a large number of experiments, it is found that after the central reflection plate is inclined by 3°, the sound line of the central reflection plate can completely cover the pool area, and the potential echo risk can be eliminated. The light steel truss 1 is provided with a hanging seat 8 at different positions, and the hanging seat 8 is connected to a pulling member connected to the structure of the theater building, such as the ceiling, and by adjusting the pulling members on different hanging seats 8, the inclination angle of the light steel truss 1 can be fine-tuned to 3°.

[0085] In the design of the central reflector, the installation height of the reflector also needs to be considered. In the initial stage of the design of the reflector, the reflector is analyzed according to a stroke of 7-14 m. It can be found that the change of the height of the reflector affects the coverage range and the sound energy size. When the reflector is in the high position, the reflected sound reaches the audience and the stage for a longer time, which can improve the sense of enclosure and space. The disadvantage is that the energy intensity may be weak, and the support for the performance area is insufficient. When the reflector is in the low position, the reflected sound reaches for a shorter time, which can increase the clarity and loudness. The disadvantage is that the sound field is too loud, causing a sense of oppression. Considering the different types of performances and the different preferences of the orchestra for the sound field, the reflector of the present application adopts a floating reflector design in the design process. That is, the height of the reflector can be adjusted to meet different needs. The pulling member is connected to the hanger 8, and by adjusting each pulling member at the same time, the central reflector can be lifted or lowered synchronously. The pulling member can be any one or more of a pull rope, a metal cable, a lifting cylinder and a lifting oil cylinder, and the present application does not limit the specific structure of the pulling member.

[0086] In the design of the central reflector, acoustic considerations also need to be taken into account. The shape of the reflector is an important link that takes into account acoustics, structure and aesthetics. There are usually three types of reflectors: reflectors combined with suspended ceilings (such as the Vienna Golden Hall and the Disney Music Hall), decentralized reflectors (such as the Sydney Opera House Music Hall and the Fujian Strait Arts Center), and integrated reflectors (such as the Beijing Arts Center and the Elbe Music Hall). No matter which type of reflector, the acoustic function needs to meet the appropriate reverberation, clarity, subjective sound level, apparent sound source width and ensemble conditions, and also needs to judge the rationality of the distribution of sound energy at each time period according to the reflection sequence, and check whether there are sound defects. For example, the reflector design of the Beijing Arts Center Music Hall analyzes the sound quality differences of each area of the reflector, and adjusts and optimizes the design of the reflector by analyzing and comparing the acoustic differences of each point according to the reflection sequence, the sound energy decay rose diagram, the reverberation time, the clarity and other parameters.

[0087] The preferred embodiments of the present application disclosed above are only used to help explain the present application. The preferred embodiments do not exhaustively describe modifications and changes. The embodiments are selected and specifically described in the specification in order to better explain the principles and practical applications of the present application, so that those skilled in the art can well understand and utilize the present application. The present application is limited by the claims and their entire scope and equivalents.

Claims

1. A concert hall central baffle, characterized in that, The present application relates to a light steel grid structure, which comprises the following components: a light steel grid structure, which comprises main beams and secondary beams arranged in a crisscross manner; a connecting piece arranged at the bottom of the light steel grid structure and connected to the light steel grid structure; a sound reflection main plate connected to the connecting piece; a light strip fastener arranged on the main beams and / or secondary beams, which is arranged on the two sides of the light steel grid structure along the thickness direction; a light strip arranged on the light strip fastener; a light frame arranged on the light steel grid structure, which is arranged on the side of the light steel grid structure away from the connecting piece; a light body, at least part of which is arranged on the light frame.

2. The concert hall central baffle of claim 1, wherein, The main beams are continuous beam bodies. The secondary beams comprise a plurality of secondary beam segments, at least part of which is arranged between two adjacent main beams and connected to the main beams.

3. The concert hall central baffle of claim 1, wherein, The main beams comprise a plurality of main beam segments. In two adjacent main beam segments, one end of one of the main beam segments is provided with two flat plates arranged at intervals, and a side opening is formed between the two flat plates; one end of the other main beam segment is provided with two vertical plates arranged at intervals, and the two vertical plates extend over and close the corresponding side openings, respectively; and the vertical plates and the flat plates are welded and fixed.

4. The concert hall central baffle of claim 1, wherein, The light strip fastener comprises a top strip and side strips arranged on both sides of the top strip. The top strip covers the upper surface of the main beams or secondary beams. The side strips are arranged on both sides of the main beams or secondary beams. The side strips and the main beams or secondary beams form a containing cavity and a bottom opening connected to the containing cavity, and the bottom opening faces the sound reflection main plate. The light strip is arranged in the containing cavity and connected to the light strip fastener.

5. The concert hall central baffle of claim 4, wherein, The top strip extends out of the main beams or secondary beams on both sides. The light strip is connected to the part of the top strip extending out of the main beams or secondary beams.

6. The concert hall central baffle of claim 1, wherein, The light frame comprises a stand, a sleeve and a light pole. The stand is connected to the light steel grid structure. The sleeve is arranged at the top end of the stand. The light pole is arranged in the sleeve, and the light pole and the light steel grid structure have a gap, and at least part of the light body is arranged on the light pole.

7. The concert hall central baffle of claim 1, wherein, The hanging seat comprises a connecting body and a hanging lug connected to the connecting body. The main beams or secondary beams comprise a top wall, a bottom wall and a side wall connected to the top wall and the bottom wall, which form a cavity, and the bottom wall has a fixing opening connected to the cavity. The connecting body extends through the top wall and the cavity to the fixing opening. The connecting body and the bottom wall are welded and fixed at the fixing opening.

8. The method of constructing a central reflector for a concert hall according to any one of claims 1 to 7, wherein The present application relates to a light steel grid structure, which comprises the following components: S1, pre-assembling the structural components of the central sound reflection plate of the music hall in the factory, and transporting the structural components to the site after the pre-assembly is completed; S2, welding the main beams and the secondary beams to form the light steel grid structure on the site; S3, assembling the light frame, the light strip fastener and the hanging seat on the light steel grid structure; S4, assembling the connecting piece on the light steel grid structure, and installing the small glass pieces of the sound reflection main plate on the connecting piece; S5, installing the light strip on the light strip fastener and installing the light body on the light frame.

9. The method of installing a concert hall central baffle according to claim 8, wherein, In step S2, the main beams and the secondary beams are sequentially welded from the middle to the periphery. In step S4, a threaded sleeve is welded at the bottom of the light steel truss, a threaded rod of the adapter is screwed to the threaded sleeve, and a small glass sheet is fixed to the corresponding adapter.

10. The method of installing a concert hall central baffle according to claim 8, wherein In step S3, the step of assembling the lamp holder includes welding a column to the light steel truss, arranging a sleeve at the top end of the column, and threading a lamp rod through the sleeve; In step S3, the step of assembling the pendant includes threading a connecting body of the pendant through the top wall and the cavity of the main beam or the secondary beam, so that the bottom end of the connecting body extends to a fixing port of the bottom wall, and the connecting body is welded and fixed with the bottom wall at the fixing port.

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