A large-scale overlapping ceiling structure and its construction method

Abstract

The present invention discloses a large-scale overlapping ceiling structure and its construction method. The large-scale overlapping ceiling structure includes a ceiling unit, a main suspension rod unit connected above the ceiling unit, a side sealing unit connected to the side of the ceiling unit, and a grille assembly connected to the periphery of the side sealing unit. By overlapping the ceiling main boards up and down, the present invention not only facilitates the aesthetics of decoration, but also uses sound-absorbing boards to divide the space and perform local sound absorption in different areas. Moreover, through the horizontal push installation for butt joint bonding of the seams and the multi-pass coating design, the accuracy of the installation splicing and the integration of the surface layer are ensured. Through the setting of the side sealing unit, it is beneficial to ensure the enclosure at the overlapping part, above and around the ceiling main board. And the side sealing board is made of a flame-retardant board, which is more conducive to the flame retardancy of the top space. Moreover, through the combined setting of the shaped vertical square pipe and the shaped corner square pipe, not only the aesthetics of decoration is increased, but also the integrity of the connection is more conducive to.

Description

Technical Field

[0001] The present invention relates to the technical field of ceiling installation, and particularly relates to a large overlapping ceiling structure and a construction method thereof. Background Art

[0002] The ceiling is an important part of interior decoration of buildings. It can not only hide pipelines and light belts, thus playing a role in decorative beauty; but also can be used for space division and sound absorption. Most of the existing ceilings are set at the same elevation, and their installation is also carried out by hoisting and installing a grid keel framework; however, for special-shaped ceilings, especially those with a staggered arrangement in the height direction, how to carry out installation, enclosure, and construction of the board joints and coatings on the ceiling surface is rarely involved, so targeted settings are required. Summary of the Invention

[0003] The present invention provides a large overlapping ceiling structure and a construction method thereof to solve technical problems such as the installation, board fixing, and joint coating construction of large overlapping ceilings.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A large overlapping ceiling structure includes a ceiling unit, a main hanger unit connected above the ceiling unit, a side enclosure unit connected to the side of the ceiling unit, and a grille assembly connected to the periphery of the side enclosure unit;

[0006] The ceiling unit includes two overlapping ceiling main boards, ceiling main concave plates arranged in each ceiling main board, ceiling coatings arranged on the outer sides of the ceiling main boards and the ceiling main concave plates, ceiling connecting nails connected to the inner sides of the ceiling main boards and the ceiling main concave plates, and ceiling hanging components connected between the ceiling connecting nails and the main keels of the main boards;

[0007] The lower parts of the two ceiling main boards are circularly arranged, and the upper parts are circularly arranged with a notch, and the notch is an arc-shaped notch; a side enclosure unit is arranged within the overlapping part and within the range from the outer periphery of the ceiling main board to the grille height;

[0008] The side enclosure unit includes side enclosure boards, side enclosure connecting nails connected to the back of the side enclosure boards, and main keels of the main boards corresponding to the side enclosure connecting nails; side enclosure boards are vertically arranged at the circular periphery of the lower ceiling main board and the outer overhanging periphery of the upper ceiling main board, and a shaped vertical square tube is arranged between the side enclosure boards and the main keels of the main boards here;

[0009] A cylindrical side enclosure board is arranged on the inner side above the main keel of the main board; there is also a side board keel arranged at an interval between the cylindrical side enclosure board and the conversion layer column, the side board keel is a U-shaped part with an opening facing the conversion layer column, and the back is fixedly connected to the side enclosure board through side board connecting nails;

[0010] There is also a horizontally arranged side seal plate connected between the bottom of the cylindrical seal plate at the lower ceiling main board and the side seal plates around the lower ceiling main board; an internal angle is formed between the horizontally arranged side seal plate and the cylindrical seal plate, and a shaped angle square tube is arranged between the horizontally arranged side seal plate at the internal angle and the main keel of the main board.

[0011] The lower cylindrical seal plate is disconnected in the height direction at the notch of the upper ceiling main board, and the top of the disconnection part is correspondingly connected to the outer periphery of the upper ceiling main board.

[0012] The inner cylindrical seal plate above the upper ceiling main board is horizontally disconnected upward at the notch and is hermetically connected to the seal plate at the same height of the lower ceiling main board; there is also a horizontally arranged side seal plate connected between the bottom of the inner cylindrical part above the upper ceiling main board and the side seal plates around the upper ceiling main board; an internal angle is formed between the horizontally arranged side seal plate and the cylindrical seal plate, and a shaped angle square tube is arranged between the horizontally arranged side seal plate at the internal angle and the main keel of the main board.

[0013] Further, the ceiling main board is an acoustic absorption board, and the diameter of the ceiling main board is not less than 15m; the ceiling main board is formed by splicing strips.

[0014] Further, the main concave board of the ceiling is in an inverted U shape, and the board body is a flame retardant board; a ceiling groove is arranged at the main concave board of the ceiling; installation lamp belts, pipelines or electric wires are arranged in the ceiling groove.

[0015] Further, the ceiling hanging component includes a ceiling board keel and a ceiling main board hanging piece detachably connected to the ceiling board keel; the ceiling board keel is a U-shaped strip keel and is pre-connected to the ceiling main board through ceiling connecting nails;

[0016] The ceiling main board hanging piece is an inverted L-shaped piece, with an inverted T shape arranged at the bottom of the vertical part and correspondingly detachably connected to the ceiling board keel, and a hook shape is arranged at the top of the horizontal part to hook and connect the main keel of the main board.

[0017] Further, the main keel of the main board is an I-shaped piece, which is connected to the main structure through a conversion layer column; the conversion layer column is a right-angled piece; the main keel of the main board and the main keel of the inner concave board corresponding to the main concave board of the ceiling are fixedly connected in a stepped manner.

[0018] Further, the main hanger unit is correspondingly arranged on the main keel of the main board and the main keel of the inner concave board, and the top of the main hanger unit is connected to the main structure;

[0019] The main hanger unit includes a main hanger, a main hanging piece arranged at the bottom end of the main hanger, and a main fastening nut connecting the main hanging piece and the main hanger;

[0020] The main suspension member is in an inverted "E" shape, with the lower end correspondingly hung below the main keel of the main board or the main keel of the concave board, and the upper end correspondingly connected above the main keel of the main board or the main keel of the concave board and fixedly connected through a main fastening nut.

[0021] Further, the grille assembly includes a grille main body, a grille keel connected to the top of the grille main body, and a grille hanger rod connected above the grille keel; the grille keel is an I-shaped keel.

[0022] The grille is trapezoidal and arranged obliquely, with a notch provided on the upper waist edge.

[0023] The grille hanger rod includes a main grille hanger rod, and a grille upper fastener and a grille lower fastener connected to the bottom of the grille hanger rod.

[0024] Further, the grille upper fastener is a pair of fixing nuts clamped on the upper flange plate of the grille keel and fixedly connected to the main grille hanger rod; the grille lower fastener includes two nuts in the shape of "I" and a screw rod, the lower nut is clamped at the upper notch of the grille, and the upper nut is located on the top surface of the lower flange plate of the grille keel.

[0025] Further, both the shaped vertical square pipe and the shaped corner square pipe are adapted to the designed distance between the side sealing plate and the main keel of the main board at their respective locations, and the shaped vertical square pipe, the shaped corner square pipe and the main keel of the main board are fixedly connected by welding.

[0026] Further, the construction method of the large overlapping ceiling structure is as follows:

[0027] Step 1: Establish a 3D software model according to the dimensions of the ceiling main board and the main concave ceiling board, divide the ceiling main board into strips and number them in the model; and make a combined setting for the positions of the side sealing plates and the grilles.

[0028] Step 2: During on-site construction, according to the design floor plan, pop the position lines of the main keel of the main board, the main keel of the concave board and the main hanger rod unit on the top plate; among them, the main keels are arranged along the long side in parallel areas, and are respectively arranged from the center of the ceiling to both sides.

[0029] Step 3: Install the conversion layer, connect the conversion layer columns to the top plate through expansion bolts; and install the main hanger rod unit on the top plate; among them, the top of the main hanger rod is connected to the top plate through bolts, and the distance between the main hanger rod and the end of the main keel of the main board does not exceed 300 mm.

[0030] Step 4: Install the main keel of the main board and the main keel of the concave board below the main hanger rod and the conversion layer columns; then install the ceiling hanging components on the main keel of the main board and the main keel of the concave board; pre-assemble the ceiling main board on the ground according to the numbers, and connect each ceiling main board to the ceiling hanging components through ceiling connecting nails one by one; install the upper ceiling main board first, and then install the lower ceiling main board.

[0031] Among them, when installing the ceiling main board, the ceiling main concave board at the ceiling groove is installed together; after installation, the position is rechecked;

[0032] Step Five: Construct the side sealing unit. First, construct the side sealing board at the overlapping part of the upper ceiling main board and the lower ceiling main board; before installation, fixedly weld the shaped vertical square pipe and the shaped corner square to the main keel of the main board, and then connect them to the side sealing board through connecting nails; at the position where the side board keel is set, first weld it to the conversion layer column, and then fix and connect it through side sealing connecting nails;

[0033] Step Six: Install the side sealing boards on the outer peripheries of the upper ceiling main board and the lower ceiling main board; then install the grille assembly, where the grille main body is arranged obliquely; then level and position the ceiling main board, the ceiling main concave board and the side sealing board uniformly, and fill the corresponding joints;

[0034] The joints are bonded by adhesives. When bonding, use a putty knife to evenly apply the adhesive on the side surfaces of all butt joint boards; to prevent "continuous joints", the installation of the boards is offset by 300 - 400 mm; for the installation of all boards, the boards must be closely attached to the corresponding keels, then pushed horizontally towards the edge of the butt joint board, and then fixed to the corresponding keels with corresponding connecting nails; among them, for the connecting nails corresponding to the side sealing board and the ceiling main board, the indentation into the board surface is not more than 1 mm;

[0035] Step Seven: Finally, uniformly apply the ceiling coating on the outer sides of the ceiling main board, the ceiling main concave board and the side sealing board;

[0036] Among them, the ceiling coating is divided into a primer layer and a topcoat layer; the primer layer must be applied in two coats. The first coat must be thinly applied on the board surface to form a rough surface, and the second coat is constructed after it dries; start applying from the corner edge, apply a sufficient amount of material for the convenience of the next scraping operation; use a toothed scraper to perform a crosswise scraping operation; the second scraping operation is parallel to the main light source direction, and the scraper is pulled forcefully at a 30° angle until the sound of scraping the board surface is heard, and stop the scraping operation 3 cm away from the edge strip; use a wide leveling knife to perform a leveling operation at a 10° angle with uniform force; the leveling operation starts from the edge and extends to other areas; repair the burrs on the board surface after leveling; leave it for 36 or 48 hours until the coating surface dries, and scrape off the burr coating at the edge with a plastic sheet;

[0037] After the primer layer dries for 36 or 48 hours, start the construction of the topcoat layer; apply the topcoat from the ceiling edge on the surface of the bottom coat; the application operation is the same as that of the bottom coat, and according to the different temperatures and humidities on site, the leveling treatment must be carried out within 15 - 45 minutes, and after completion, scrape off the burr coating at the edge with a plastic sheet.

[0038] The beneficial effects of the present invention are embodied in:

[0039] 1) By overlapping the ceiling main boards up and down, the present invention not only facilitates the aesthetics of decoration, but also can use sound-absorbing boards to divide the space and perform local sound absorption in different areas. Moreover, through horizontal pushing installation for butt joint bonding of seams and multi-pass coating design of the coating, the accuracy of installation splicing and the integration of the surface layer are ensured.

[0040] 2) By setting the side sealing unit, it is beneficial to ensure the sealing of the overlapping part, above and around the ceiling main board. And the side sealing board is made of a flame-retardant board, which is more conducive to fire retardancy of the top space. Moreover, through the combined setting of the shaped vertical square tube and the shaped corner square tube, not only the aesthetics of decoration is increased, but also the integrity of connection is more beneficial.

[0041] 3) By setting the conversion layer column and the main hanger unit, not only the final load-bearing of the ceiling unit is ensured, but also the conversion layer column provides a basis for the installation and fixation of the side sealing unit.

[0042] Other features and advantages of the present invention will be described in the following specification, and will be partially obvious from the specification, or understood by implementing the present invention. The main purpose and other advantages of the present invention can be achieved and obtained through the solutions specifically pointed out in the specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 is a side view of a large overlapping ceiling structure;

[0044] Figure 2 is a partial schematic view of a large overlapping ceiling structure;

[0045] Figure 3 is a bottom view schematic of the ceiling main board and the ceiling main concave board;

[0046] Figure 4 is a schematic view of the ceiling hanging component structure;

[0047] Figure 5 is a schematic view of the connection structure of the grille component, the side sealing unit and the conversion layer column;

[0048] Figure 6 is a schematic view of the grille main structure;

[0049] Figure 7 is a schematic view of the connection structure of the grille keel and the grille hanger;

[0050] Figure 8 is a schematic view of the side sealing unit and its connection structure;

[0051] Figure 9 is a schematic view of the connection structure of the side sealing nail and the side board keel.

[0052] Reference numerals: 1 - ceiling unit, 11 - ceiling main board, 12 - ceiling main concave board, 13 - ceiling coating, 14 - ceiling groove, 15 - ceiling connecting nail, 16 - ceiling hanging component, 161 - ceiling board keel, 162 - ceiling main board hanger, 17 - main keel of main board, 18 - main keel of concave board, 2 - main hanger unit, 21 - main hanger, 22 - main hanging piece, 23 - main fastening nut, 3 - grille component, 31 - grille body, 32 - grille keel, 33 - grille hanger, 331 - main grille hanger rod, 332 - upper grille fastener, 333 - lower grille fastener, 4 - side sealing unit, 41 - side sealing board, 42 - side sealing connecting nail, 43 - side board keel, 44 - shaped vertical square pipe, 45 - shaped corner square pipe, 5 - conversion layer column. Detailed implementation manners

[0053] Taking a certain meeting as an example, as Figures 1 to 9 shown, the large overlapping ceiling structure includes a ceiling unit 1, a main hanger unit 2 connected above the ceiling unit 1, a side sealing unit 4 connected to the side of the ceiling unit 1, and a grille component 3 connected to the periphery of the side sealing unit 4.

[0054] Among them, the ceiling main board 11 is an acoustic sound-absorbing board, and the diameter of the ceiling main board 11 is 18 m; the ceiling main board 11 is formed by splicing in strips. The ceiling main concave board 12 is in an inverted U shape, and the board body is a flame-retardant board; a ceiling groove 14 is provided at the ceiling main concave board 12; a lighting strip, pipelines or electric wires are installed in the ceiling groove 14.

[0055] In this embodiment, the ceiling unit 1 includes two ceiling main boards 11 arranged one above the other, a ceiling main concave board 12 provided in each ceiling main board 11, a ceiling coating 13 provided on the outer sides of the ceiling main board 11 and the ceiling main concave board 12, a ceiling connecting nail 15 connecting the inner sides of the ceiling main board 11 and the ceiling main concave board 12, and a ceiling hanging component 16 connecting the ceiling connecting nail 15 and the main keel 17 of the main board. The lower parts of the two ceiling main boards 11 are circularly arranged, and the upper parts are circularly arranged with a notch, and the notch is an arc-shaped notch; a side sealing unit 4 is provided in the overlapping part and within the range from the outer periphery of the ceiling main board 11 to the grille height.

[0056] In this embodiment, the side sealing unit 4 includes a side sealing board 41, a side sealing connecting nail 42 connected to the back of the side sealing board 41, and a main keel 17 of the main board corresponding to the side sealing connecting nail 42; the side sealing board 41 is vertically provided at the circular periphery of the lower ceiling main board 11 and the outer overhanging periphery of the upper ceiling main board 11, and a shaped vertical square pipe 44 is provided between the side sealing board 41 and the main keel 17 of the main board here.

[0057] Inside the upper inner side of the main board main keel 17, a cylindrical side sealing plate 41 is provided; there is also a side plate keel 43 arranged at intervals between the cylindrical side sealing plate 41 and the conversion layer column 5. The side plate keel 43 is a U-shaped part with an opening facing the conversion layer column 5, and the back is fixedly connected to the side sealing plate 41 through side plate connecting nails.

[0058] In this embodiment, a horizontally arranged side sealing plate 41 is also connected between the bottom of the cylindrical sealing plate at the lower suspended ceiling main board 11 and the side sealing plate 41 around the lower suspended ceiling main board 11; an internal angle is formed between the horizontally arranged side sealing plate 41 and the cylindrical sealing plate, and a shaped angle square tube 45 is arranged between the horizontally arranged side sealing plate 41 and the main board main keel 17 at the internal angle. The lower cylindrical sealing plate is disconnected in the height direction at the notch of the upper suspended ceiling main board 11, and the top of the disconnection part is correspondingly connected to the outer periphery of the upper suspended ceiling main board 11.

[0059] In this embodiment, the cylindrical sealing plate on the upper inner side of the upper suspended ceiling main board 11 is horizontally disconnected upward at the notch and is hermetically connected to the sealing plate at the same height of the lower suspended ceiling main board 11; a horizontally arranged side sealing plate 41 is also connected between the bottom of the upper inner side cylindrical of the upper suspended ceiling main board 11 and the side sealing plate 41 around the upper suspended ceiling main board 11; an internal angle is formed between the horizontally arranged side sealing plate 41 and the cylindrical sealing plate, and a shaped angle square tube 45 is arranged between the horizontally arranged side sealing plate 41 and the main board main keel 17 at the internal angle.

[0060] Among them, both the shaped vertical square tube 44 and the shaped angle square tube 45 adapt to the designed distance between the side sealing plate 41 and the main board main keel 17 at the location, and the shaped vertical square tube 44, the shaped angle square tube 45 and the main board main keel 17 are fixedly connected by welding.

[0061] In this embodiment, the suspended ceiling hanging component 16 includes a suspended ceiling board keel 161 and a suspended ceiling main board hanging part 162 detachably connected to the suspended ceiling board keel 161; the suspended ceiling board keel 161 is a U-shaped strip keel and is pre-connected to the suspended ceiling main board 11 through suspended ceiling connecting nails 15; the suspended ceiling main board hanging part 162 is an inverted L-shaped part, with an inverted T shape arranged at the bottom of the vertical part and correspondingly detachably connected to the suspended ceiling board keel 161, and the top of the horizontal part is set as a hook shape to hang on the main board main keel 17.

[0062] In this embodiment, the main board main keel 17 is an I-shaped steel part, which is connected to the main structure through the conversion layer column 5; the conversion layer column 5 is a right-angled part; the main board main keel 17 and the inner concave board main keel 18 corresponding to the suspended ceiling main inner concave board 12 are fixedly connected in a stepped manner.

[0063] The main suspension rod unit 2 is correspondingly arranged on the main keel 17 of the main board and the main keel 18 of the concave board, and the top of the main suspension rod unit 2 is connected to the main structure; the main suspension rod unit 2 includes a main suspension rod 21, a main suspension member 22 arranged at the bottom end of the main suspension rod 21, and a main fastening nut 23 connecting the main suspension member 22 and the main suspension rod 21; the main suspension member 22 is in an inverted "guard" shape, the lower end is correspondingly hung under the main keel 17 of the main board or the main keel 18 of the concave board, and the upper end is correspondingly connected above the main keel 17 of the main board or the main keel 18 of the concave board and is fixedly connected through the main fastening nut 23.

[0064] In this embodiment, the grille assembly 3 includes a grille main body 31, a grille keel 32 connected to the top of the grille main body 31, and a grille suspension rod 33 connected above the grille keel 32; the grille keel 32 is an I-shaped keel; the grille is trapezoidal and arranged obliquely, and there is a notch on the upper waist side; the grille suspension rod 33 includes a main grille suspension rod 331, and a grille upper fastener 332 and a grille lower fastener 333 connected to the bottom of the grille suspension rod 33.

[0065] In this embodiment, the grille upper fastener 332 is a pair of fixing nuts clamped on the upper flange plate of the grille keel 32 and is fixedly connected to the main grille suspension rod 331; the grille lower fastener 333 includes two nuts in the shape of "I" and a screw rod, the lower nut is clamped at the upper notch of the grille, and the upper nut is located on the top surface of the lower flange plate of the grille keel 32.

[0066] Combined Figures 1 to 9 As shown in the figure, the construction method of the large overlapping ceiling structure is further described, and the specific steps are as follows:

[0067] Step 1: Establish a three-dimensional software model according to the sizes of the ceiling main board 11 and the ceiling main concave board 12, divide the ceiling main board 11 into strips and number them in the model; and combine and set the positions of the side sealing plates 41 and the grille positions.

[0068] Step 2: During on-site construction, according to the design plan view, pop the position lines of the main keel 17 of the main board, the main keel 18 of the concave board and the main suspension rod unit 2 on the top plate; among them, the main keels are arranged longitudinally in the parallel area and are respectively arranged from the center of the ceiling to both sides.

[0069] Step 3: Install the conversion layer, connect the conversion layer columns 5 to the top plate through expansion bolts; and install the main suspension rod unit 2 on the top plate; among them, the top of the main suspension rod 21 is connected to the top plate through bolts, and the distance between the main suspension rod 21 and the end of the main keel 17 of the main board does not exceed 300 mm.

[0070] Step 4: Install the main keels 17 of the main board and the main keels 18 of the concave board under the main suspension rod 21 and the conversion layer column 5; then install the ceiling hanging components 16 on the main keels 17 of the main board and the main keels 18 of the concave board; pre-assemble the ceiling main boards 11 on the ground according to the numbers, and connect each ceiling main board 11 to the ceiling hanging components 16 through the ceiling connecting nails 15; install the upper ceiling main board 11 first, and then install the lower ceiling main board 11.

[0071] Among them, when installing the ceiling main board 11, install the main concave board 12 of the ceiling at the ceiling groove 14 at the same time; after installation, check the position again.

[0072] Step 5: Construct the side seal unit 4. First, construct the side seal board 41 at the overlapping part of the upper ceiling main board 11 and the lower ceiling main board 11; before installation, weld the shaped vertical square pipe 44 and the shaped angle square to the main keel 17 of the main board correspondingly, and then connect them to the side seal board 41 through the connecting nails; at the position where the side board keel 43 is set, weld it to the conversion layer column 5 in advance, and then fix and connect it through the side seal connecting nails 42.

[0073] Step 6: Install the side seal boards 41 on the outer perimeters of the upper ceiling main board 11 and the lower ceiling main board 11; then install the grille assembly 3, in which the grille body 31 is arranged obliquely; then level and position the ceiling main board 11, the main concave board 12 of the ceiling and the side seal board 41 uniformly, and fill the corresponding joints; finally, uniformly apply the ceiling coating 13 on the outsides of the ceiling main board 11, the main concave board 12 of the ceiling and the side seal board 41.

[0074] The joints rely on adhesives for bonding. When bonding, use a trowel to evenly apply the adhesive on the side surfaces of all the butting boards; to prevent "continuous joints", stagger the installation of the boards by 300 - 400 mm; for the installation of all the boards, the boards must be closely attached to the corresponding keels, then pushed horizontally towards the edge of the butting board, and then fix the boards to the corresponding keels with the corresponding connecting nails; among them, for the connecting nails corresponding to the side seal board 41 and inside the ceiling main board 11, the indentation into the board surface is not more than 1 mm;

[0075] Step 7: Finally, uniformly apply the ceiling coating 13 on the outsides of the ceiling main board 11, the main concave board 12 of the ceiling and the side seal board 41.

[0076] Among them, the ceiling soil layer is divided into a bottom coating layer and a top coating layer; the bottom coating layer must be applied in two coats. The first coat must be thinly applied on the board surface to form a rough surface. After it dries, the second coat construction is carried out. Start applying from the corner edge. To facilitate the next scraping and leveling process, a sufficient amount of material must be applied. Use a 4x4mm toothed spatula to perform a crosswise scraping and leveling operation. The second scraping and leveling operation must be parallel to the main light source direction. The spatula is pulled with a 30° angle until the sound of scraping the board surface is heard, and stop the scraping and leveling operation 3cm away from the edge strip. Use a wide leveling spatula to perform a leveling operation at a 10° angle with uniform force, scraping off as little coating as possible. The leveling operation starts from the edge and extends to other areas. Repair the burrs on the board surface after leveling. Let it stand for 36 or 48 hours until the coating surface dries, and scrape off the burr coating at the edge with a plastic sheet.

[0077] After the bottom coating layer has dried for 36 or 48 hours, start the construction of the top coating layer. Apply the top coating from the ceiling edge onto the surface of the bottom coating layer. Use a 4x4mm toothed spatula to perform a vertical crosswise scraping and leveling operation. The second leveling must be parallel to the main light source direction. The spatula is pulled with a 30° angle until the sound of scraping the board surface is heard, and stop the scraping and leveling operation 3cm away from the edge strip. To ensure that the coating thickness is as uniform as possible, the toothed spatula scraping and leveling operation must always be carried out in the same direction. Each step is operated by the same painter. Use a wide leveling spatula to perform a leveling operation at a 10° angle with uniform force all the time, scraping off as little coating as possible. The leveling operation starts from the edge and extends to other areas. According to the different temperatures and humidities at the site, the leveling treatment must be carried out within 15 - 45 minutes. After completion, scrape off the burr coating at the edge with a plastic sheet.

[0078] The above is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A large overlapping ceiling structure, characterized in that: It comprises a ceiling unit (1), a main suspension rod unit (2) connected above the ceiling unit (1), a side sealing unit (4) connected to the side of the ceiling unit (1), and a grille assembly (3) connected to the periphery of the side sealing unit (4); The ceiling unit (1) comprises two ceiling main boards (11) arranged in an overlapping manner, a ceiling main concave plate (12) arranged in each ceiling main board (11), a ceiling coating (13) arranged on the outside of the ceiling main board (11) and the ceiling main concave plate (12), a ceiling connecting nail (15) connected to the inside of the ceiling main board (11) and the ceiling main concave plate (12), and a ceiling hanging component (16) connected between the ceiling connecting nail (15) and the main board main keel (17); The two ceiling main boards (11) are arranged in a circular shape at the bottom and in a circular shape with a notch at the top, wherein the notch is an arc-shaped notch; a side sealing unit (4) is arranged at the overlapping part and within the range from the outer periphery of the ceiling main board (11) to the height of the grille; The side sealing unit (4) comprises a side sealing plate (41), a side sealing connecting nail (42) connected to the back of the side sealing plate (41), and a main keel (17) of the main board arranged corresponding to the side sealing connecting nail (42); the side sealing plate (41) is vertically arranged at the circular periphery of the lower ceiling main board (11) and the outer cantilevered periphery of the upper ceiling main board (11), and a fixed vertical square passage (44) is arranged between the side sealing plate (41) and the main keel (17); A cylindrical side sealing plate (41) is arranged on the inner side above the main main keel (17); a side plate keel (43) is arranged between the cylindrical side sealing plate (41) and the transfer layer column (5); the side plate keel (43) is a U-shaped member with an opening facing the transfer layer column (5), and the back side is fixedly connected to the side sealing plate (41) by side plate connecting nails; A horizontally arranged side sealing plate (41) is further connected between the bottom of the cylindrical sealing plate at the lower ceiling main board (11) and the side sealing plate (41) around the lower ceiling main board (11); a negative angle is formed between the horizontally arranged side sealing plate (41) and the cylindrical sealing plate, and a fixed angle square passage (45) is provided between the horizontally arranged side sealing plate (41) at the negative angle and the main keel (17) of the main board; The lower cylindrical sealing plate is disconnected in the height direction at the notch of the upper ceiling main board (11), and the top of the disconnection is correspondingly connected to the outer periphery of the upper ceiling main board (11); The inner cylindrical sealing plate above the upper ceiling main board (11) is disconnected horizontally upward at the notch and is sealedly connected to the sealing plate at the same height of the lower ceiling main board (11); a horizontally arranged side sealing plate (41) is also connected between the inner cylindrical bottom above the upper ceiling main board (11) and the side sealing plate (41) around the upper ceiling main board (11); a negative angle is formed between the horizontally arranged side sealing plate (41) and the cylindrical sealing plate, and a fixed angle square passage (45) is arranged between the horizontally arranged side sealing plate (41) at the negative angle and the main keel (17) of the main board.

2. A large overlapping ceiling structure as claimed in claim 1, characterized in that: The suspended ceiling main board (11) is an acoustic sound absorbing board, and the diameter of the suspended ceiling main board (11) is not less than 15m; the suspended ceiling main board (11) is formed by splicing strips.

3. A large overlapping ceiling structure as claimed in claim 1, characterized in that: The main inner concave plate (12) of the suspended ceiling is in an inverted U shape, and the plate body is a flame retardant plate; a suspended ceiling groove (14) is provided at the main inner concave plate (12); a light strip, pipeline or wire is installed in the suspended ceiling groove (14).

4. A large overlapping ceiling structure as claimed in claim 1, characterized in that: The ceiling hanging assembly (16) comprises a ceiling board keel (161) and a ceiling main board hanger (162) detachably connected to the ceiling board keel (161); the ceiling board keel (161) is a U-shaped strip keel and is pre-connected to the ceiling main board (11) via ceiling connecting nails (15); The ceiling mainboard hanger (162) is an inverted L-shaped piece, the bottom end of the vertical part is provided with an inverted T shape corresponding to the detachable connection ceiling board keel (161), and the top end of the horizontal part is provided with a hook shape to hang the main board main keel (17).

5. A large overlapping ceiling structure as claimed in claim 1, characterized in that: The main main keel (17) of the main board is an I-shaped member, which is connected to the main structure via a transfer layer column (5); the transfer layer column (5) is a right-angled member; the main main keel (17) of the main board and the main concave plate main keel (18) corresponding to the main concave plate (12) of the suspended ceiling are fixedly connected in a stepped manner.

6. A large overlapping ceiling structure as claimed in claim 5, characterized in that: The main suspension rod unit (2) is correspondingly arranged on the main plate main keel (17) and the inner concave plate main keel (18), and the top of the main suspension rod unit (2) is connected to the main structure; The main suspension rod unit (2) comprises a main suspension rod (21), a main suspension component (22) arranged at the bottom end of the main suspension rod (21), and a main fastening nut (23) connecting the main suspension component (22) and the main suspension rod (21); The main hanging member (22) is in the shape of an inverted Chinese character "Wei", with the lower end correspondingly hung below the main keel (17) of the main board or the main keel (18) of the inner concave board, and the upper end correspondingly connected to the upper part of the main keel (17) of the main board or the main keel (18) of the inner concave board and fixedly connected via a main fastening nut (23).

7. A large overlapping ceiling structure as claimed in claim 1, characterized in that: The grille assembly (3) comprises a grille body (31), a grille keel (32) connected to the top of the grille body (31), and a grille suspension rod (33) connected above the grille keel (32); the grille keel (32) is an I-shaped keel. The grille is trapezoidal in shape and arranged obliquely, with a notch provided on the upper waist edge; The grid suspension rod (33) comprises a grid suspension main rod (331), and a grid upper fixing member (332) and a grid lower fixing member (333) connected to the bottom of the grid suspension rod (33).

8. A large overlapping ceiling structure as claimed in claim 7, characterized in that: The grille upper fixings (332) are a pair of fixing nuts clamped to the upper flange plate of the grille keel (32) and fixedly connected to the grille hanging main rod (331); the grille lower fixings (333) include two I-shaped nuts and a screw rod, the lower nut is clamped to the notch at the upper part of the grille, and the upper nut is located on the top surface of the lower flange plate of the grille keel (32).

9. A large overlapping ceiling structure as claimed in claim 1, characterized in that: The shaped vertical square tube (44) and the shaped corner square tube (45) are adapted to the designed distance between the side sealing plate (41) and the main keel (17) of the main board, and the shaped vertical square tube (44) and the shaped corner square tube (45) are fixedly connected to the main keel (17) of the main board by welding.

10. A construction method for a large overlapping ceiling structure according to any one of claims 1 to 9, characterized in that: The specific steps are as follows: Step 1: Establish a three-dimensional software model according to the dimensions of the ceiling main board (11) and the ceiling main concave board (12), divide the ceiling main board (11) into strips and label them in the model; and combine and set the position of the side sealing plate (41) and the position of the grille; Step 2: During on-site construction, according to the design plan, the position lines of the main keel (17) of the main board, the main keel (18) of the inner concave board and the main suspension rod unit (2) are popped out on the top plate; wherein the main keel is arranged in the longitudinal direction of the parallel area, and is arranged from the center of the ceiling to both sides; Step 3: Install the transfer layer, connect the transfer layer columns (5) to the top plate via expansion bolts; and install the main suspension rod unit (2) on the top plate; wherein the top of the main suspension rod (21) is connected to the top plate via bolts, and the main suspension rod (21) is no more than 300 mm away from the end of the main keel (17) of the main board; Step 4: Install the main main keel (17) and the inner concave plate main keel (18) below the main suspension rod (21) and the transfer layer column (5); then install the ceiling hanging assembly (16) on the main main keel (17) and the inner concave plate main keel (18); pre-assemble the ceiling main board (11) on the ground according to the number, and connect the ceiling main board (11) to the ceiling hanging assembly (16) one by one through the ceiling connecting nails (15); first install the upper ceiling main board (11), and then install the lower ceiling main board (11); When the ceiling main board (11) is installed, the ceiling main inner concave board (12) at the ceiling groove (14) is installed at the same time; after the installation is completed, the position is checked; Step 5: construct the side sealing unit (4), first construct the side sealing plate (41) at the overlapped portion of the upper ceiling main board (11) and the lower ceiling main board (11); before installation, weld the shaped vertical square (44) and the shaped angle square to the main keel (17) of the main board, and then connect them to the side sealing plate (41) through connecting nails; at the position where the side plate keel (43) is provided, pre-weld it to the transfer layer column (5), and then fix it through the side sealing connecting nails (42); Step 6: Install the side sealing plates (41) on the outer periphery of the upper ceiling main board (11) and the lower ceiling main board (11); then install the grille assembly (3), wherein the grille main body (31) is arranged obliquely; then uniformly level and position the ceiling main board (11), the ceiling main concave plate (12) and the side sealing plates (41), and fill the corresponding joints; The joints are bonded by adhesive, and the adhesive is evenly applied to the side surfaces of all the butt joint boards with a spatula; to prevent "through seams", the boards are installed with a staggered seam of 300-400mm; all boards must be installed close to the corresponding keel, then pushed horizontally to the edge of the butt joint board, and then fixed to the corresponding keel with corresponding connecting nails; wherein, the corresponding connecting nails in the side sealing board (41) and the ceiling main board (11) are not more than 1mm recessed into the board surface; Step 7: Finally, uniformly apply the ceiling coating (13) to the outer sides of the ceiling main board (11), the ceiling main concave board (12) and the side sealing board (41); Among them, the ceiling soil layer is divided into a primer layer and a topcoat layer; the primer layer must be applied twice, and the first layer must be applied thinly on the board surface to form a rough surface, and the second layer must be constructed after it dries; start applying from the edge of the corner, and apply enough material to facilitate the next step of scraping; use a toothed scraper to perform cross-direction scraping; the second scraping operation is parallel to the direction of the main light source, and the scraper is pulled hard at an angle of 30° until the sound of scraping the board surface is heard, and the scraping operation is stopped 3cm away from the edge strip; a wide trowel is used to perform the smoothing operation at an angle of 10° and with uniform force; the smoothing operation starts from the edge and extends to other areas; after smoothing, repair the burrs on the board surface; leave it for 36 or 48 hours until the coating surface is dry, and use a plastic sheet to scrape off the edge burr paint; After the base coat has dried for 36 or 48 hours, start the construction of the top coat. Apply the top coat from the edge of the ceiling to the surface of the base coat. The application operation is the same as the base coat operation. Depending on the temperature and humidity on site, the leveling process must be carried out within 15-45 minutes. After completion, use a plastic sheet to scrape off the burrs on the edge of the paint.

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