Large overlapped suspended ceiling structure and construction method thereof

Abstract

The invention discloses a large overlapping type suspended ceiling structure and a construction method thereof. The large overlapping type suspended ceiling structure comprises a suspended ceiling unit, a main suspender unit connected to the upper portion of the suspended ceiling unit, a side sealing unit connected to the side face of the suspended ceiling unit and a grating assembly connected to the periphery of the side sealing unit. According to the ceiling, the ceiling main plates are arranged in an up-down overlapping mode, so that decoration attractiveness is facilitated; the acoustic board can be used for carrying out space division and local sound absorption in different areas; in addition, butt joint and bonding of abutted seams are conducted through horizontal pushing installation, and multi-channel smearing design of a coating is conducted, so that splicing accuracy of installation and integration of a surface layer are guaranteed; through the arrangement of the side sealing units, sealing of the overlapping position and the upper portion and the periphery of the suspended ceiling main board is guaranteed; the side sealing plates are arranged through the flame-retardant plates, so that flame retardance of the top space is better facilitated; and through the combined arrangement of the shaping vertical square tubes and the shaping angle square tubes, the attractiveness of decoration is improved, and the integrity of connection is better facilitated.

Description

Technical Field

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

[0002] The suspended ceiling is an important part of the interior decoration of buildings. It can not only hide pipelines and light strips, thus playing a decorative role, but also divide the space and absorb sound. Most of the existing suspended ceilings are set at the same elevation, and their installation is also to form a grid keel frame for hoisting and installation; however, for special-shaped suspended ceilings, especially those that are staggered in height, how to install and close them, as well as the construction of the board seams and coatings on the surface of the suspended ceilings is rarely involved, so targeted settings are needed. Summary of the invention

[0003] The invention provides a large overlapping suspended ceiling structure and a construction method thereof, which are used to solve the technical problems of setting and installing, fixing of sealing plates and construction of joint coating of the large overlapping suspended ceiling.

[0004] To achieve the above object, the present invention adopts the following technical solution: A large overlapping ceiling structure comprises 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; The ceiling unit comprises two ceiling main boards arranged overlapping each other, a ceiling main concave plate arranged in each ceiling main board, a ceiling coating arranged on the outside of the ceiling main board and the ceiling main concave plate, ceiling connecting nails connected to the inside of the ceiling main board and the ceiling main concave plate, and a ceiling hanging component connected between the ceiling connecting nails and the main keel of the main board; The two ceiling main boards are arranged in a circular shape at the bottom and in a circular shape with a notch at the top, and the notch is an arc-shaped notch; side sealing units are arranged at the overlapping part and within the range from the outer periphery of the ceiling main board to the height of the grille; The side sealing unit comprises a side sealing plate, a side sealing connecting nail connected to the back of the side sealing plate, and a main keel of the main board arranged corresponding to the side sealing connecting nail; the side sealing plate is vertically arranged at the circular periphery of the lower ceiling main board and the peripheral edge of the upper ceiling main board cantilevered outside, and a fixed vertical square passage is arranged between the side sealing plate and the main keel of the main board; A cylindrical side sealing plate is arranged on the inner side above the main keel of the main board; a side plate keel is arranged between the cylindrical side sealing plate and the transfer layer column, and the side plate keel is a U-shaped piece with an opening facing the transfer layer column, and the back side is fixedly connected to the side sealing plate by side plate connecting nails; There is also a horizontally arranged side seal plate connected between the bottom of the tubular seal plate at the lower suspended ceiling main board and the side seal plates around the lower suspended ceiling main board; an internal angle is formed between the horizontally arranged side seal plate and the tubular seal plate, and a shaped angle square pipe is arranged between the horizontally arranged side seal plate at the internal angle and the main keel of the main board. The lower tubular seal plate is disconnected in the height direction at the notch of the upper suspended ceiling main board, and the top of the disconnection part is correspondingly connected to the outer periphery of the upper suspended ceiling main board. The inner tubular seal plate above the upper suspended 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 suspended ceiling main board; there is also a horizontally arranged side seal plate connected between the bottom of the inner tubular part above the upper suspended ceiling main board and the side seal plates around the upper suspended ceiling main board; an internal angle is formed between the horizontally arranged side seal plate and the tubular seal plate, and a shaped angle square pipe is arranged between the horizontally arranged side seal plate at the internal angle and the main keel of the main board.

[0005] Further, the suspended ceiling main board is an acoustic sound-absorbing board, and the diameter of the suspended ceiling main board is not less than 15m; the suspended ceiling main board is formed by splicing strips.

[0006] Further, the main concave board of the suspended ceiling is in an inverted U shape, and the board bodies are all flame-retardant boards; a suspended ceiling groove is arranged at the main concave board of the suspended ceiling; an installation lamp belt, pipelines or electric wires are arranged in the suspended ceiling groove.

[0007] Further, the suspended ceiling hanging component includes a suspended ceiling board keel and a suspended ceiling main board hanging piece detachably connected to the suspended ceiling board keel; the suspended ceiling board keel is a U-shaped strip keel and is pre-connected to the suspended ceiling main board through suspended ceiling connecting nails; The suspended 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 suspended ceiling board keel, and a hook shape is arranged at the top of the horizontal part to hang the main keel of the main board.

[0008] 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 angle-shaped 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 suspended ceiling are fixedly connected in a stepped manner.

[0009] Further, the main hanger rod 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 rod unit is connected to the main structure; The main hanger rod unit includes a main hanger rod, a main hanging piece arranged at the bottom end of the main hanger rod, and a main fastening nut connecting the main hanging piece and the main hanger rod; The main hanging piece is in an inverted E shape, with the lower end correspondingly hanging below the main keel of the main board or the main keel of the inner concave board, and the upper end correspondingly connected above the main keel of the main board or the main keel of the inner concave board and fixedly connected through the main fastening nut.

[0010] Furthermore, the grille assembly comprises a grille body, a grille keel connected to the top of the grille body, and a grille suspension rod connected above the grille keel; the grille keel 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 comprises a grid suspension main rod, and a grid upper fixing piece and a grid lower fixing piece connected to the bottom of the grid suspension rod.

[0011] Furthermore, the upper grille fastener is a pair of fixing nuts clamped to the upper flange plate of the grille keel and fixedly connected to the main grille suspension rod; the lower grille fastener includes two I-shaped nuts and a screw, the lower nut is clamped in 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.

[0012] Furthermore, the shaped vertical square tubes and the shaped corner square tubes are adapted to the designed distance between the side sealing plate and the main keel of the main board, and the shaped vertical square tubes and the shaped corner square tubes are fixedly connected to the main keel of the main board by welding.

[0013] Further, the construction method of the large overlapping ceiling structure has the following specific steps: Step 1: Establish a 3D software model according to the size of the ceiling main board and the main inner concave board of the ceiling, divide the ceiling main board into strips and label them in the model; and combine and set the side sealing plate position and the grille position; Step 2: During on-site construction, according to the design plan, the position lines of the main keel of the main board, the main keel of the inner concave board and the main suspension rod unit are popped up on the top plate; among them, 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 to the top plate through expansion bolts; and install the main boom unit on the top plate; the top of the main boom is connected to the top plate through bolts, and the main boom is no more than 300mm away from the end of the main keel of the main board; Step 4: Install the main keel of the main board and the main keel of the inner concave board under the main suspension rod and the transfer layer column; then install the ceiling hanging assembly on the main keel of the main board and the inner concave board; pre-assemble the ceiling main board on the ground according to the number, and connect the ceiling main board to the ceiling hanging assembly one by one through the ceiling connecting nails; first install the upper ceiling main board, and then install the lower ceiling main board; When installing the ceiling main board, the main inner concave board of the ceiling at the ceiling groove is installed at the same time; after the installation is completed, the position is checked; Step 5: Construct the side sealing unit. First, construct the side sealing plate where the upper ceiling main board and the lower ceiling main board overlap. Before installation, weld the fixed vertical square and the fixed angle square to the main keel of the main board, and then connect them with the side sealing plate through connecting nails. At the location where the side plate keel is set, weld it to the transfer layer column in advance, and then fix it with the side sealing connecting nails. Step 6: Install the side sealing plates on the outer periphery of the upper ceiling main board and the lower ceiling main board; then install the grille assembly, in which the grille body is arranged obliquely; then uniformly level and position the ceiling main board, the main inner concave plate of the ceiling and the side sealing plates, and fill the corresponding joints; The joints are bonded with adhesive. When bonding, use a spatula to evenly apply the adhesive to the side surfaces of all the butt joint boards. To prevent "through seams", the boards are installed with a 300-400mm stagger. When installing all boards, the boards must be close to the corresponding keels, then pushed horizontally to the edge of the butt joint board, and then fixed to the corresponding keels with corresponding connecting nails. Among them, the corresponding connecting nails in the side sealing board and the ceiling main board are not more than 1mm recessed into the board surface. Step 7. Finally, uniformly apply the ceiling coating on the outside of the ceiling main board, the main inner concave board of the ceiling and the side sealing board; 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.

[0014] The beneficial effects of the present invention are embodied in: 1) The present invention not only facilitates the aesthetics of the decoration by overlapping the ceiling main board, but also can divide the space and locally absorb sound by using the sound-absorbing board. And the joints are butted and bonded by horizontal push installation, and the multi-layer coating design of the coating ensures the precision of the installation joints and the integration of the surface layer. 2) The present invention is conducive to ensuring the sealing of the overlapping part, the top of the ceiling main board and the surroundings through the arrangement of the side sealing unit; and the side sealing plate is arranged by the flame retardant plate, which is more conducive to the flame retardancy of the top space; and the joint arrangement of the shaped vertical square tube and the shaped corner square tube not only increases the aesthetics of the decoration, but also is more conducive to the integrity of the connection; 3) The present invention not only ensures the final load-bearing capacity of the ceiling unit by setting the transfer layer columns and the main suspension rod unit, but also provides a foundation for the side sealing unit to be installed and fixed; Other features and advantages of the present invention will be set forth in the following description, and in part will become apparent from the description, or may be understood by practicing the present invention; the main purpose and other advantages of the present invention may be realized and obtained through the solutions particularly pointed out in the description. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a side view of a large overlapping ceiling structure; Figure 2 It is a partial schematic diagram of a large overlapping ceiling structure; Figure 3 It is a schematic diagram of the ceiling main board and the ceiling main concave board when viewed from above; Figure 4 It is a schematic diagram of the structure of the ceiling hanging assembly; Figure 5 It is a schematic diagram of the connection structure of the grille assembly, the side sealing unit and the transfer layer column; Figure 6 It is a schematic diagram of the main structure of the grille; Figure 7 It is a schematic diagram of the connection structure between the grid keel and the grid suspension rod; Figure 8 Schematic diagram of the side sealing unit and its connection structure; Fig. 9 It is a schematic diagram of the connection structure between the side sealing nails and the side panel keel.

[0016] Figure markings: 1-ceiling unit, 11-ceiling main board, 12-ceiling main concave plate, 13-ceiling coating, 14-ceiling groove, 15-ceiling connecting nails, 16-ceiling hanging assembly, 161-ceiling board keel, 162-ceiling main board hanger, 17-main board main keel, 18-concave plate main keel, 2-main suspension rod unit, 21-main suspension rod, 22-main suspension, 23-main fastening nut, 3-grid assembly, 31-grid body, 32-grid keel, 33-grid suspension rod, 331-grid suspension main rod, 332-grid upper fixture, 333-grid lower fixture, 4-side sealing unit, 41-side sealing plate, 42-side sealing connecting nails, 43-side board keel, 44-shaped vertical square channel, 45-shaped corner square channel, 5-conversion layer column. DETAILED DESCRIPTION

[0017] Take a meeting as an example. Figures 1 to 9 As shown, the large overlapping ceiling structure includes 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.

[0018] The ceiling main board 11 is an acoustic sound-absorbing board, and the diameter of the ceiling main board 11 is 18m; the ceiling main board 11 is formed by splicing strips. The main inner concave board 12 of the ceiling is an inverted U-shape, and the board body is a flame-retardant board; a ceiling groove 14 is arranged at the main inner concave board 12 of the ceiling; a light strip, pipeline or wire is arranged in the ceiling groove 14.

[0019] In this embodiment, the ceiling unit 1 includes 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 keel 17 of the main board. 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, and the notch is an arc notch; a side sealing unit 4 is arranged at the overlapping part and in the range from the outer periphery of the ceiling main board 11 to the height of the grille.

[0020] In this embodiment, the side sealing unit 4 includes 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 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 of the main board.

[0021] A cylindrical side sealing plate 41 is arranged on the inner side above the main keel 17 of the main board; a side plate keel 43 is arranged between the cylindrical side sealing plate 41 and the transfer layer column 5, and 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. In this embodiment, 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 arranged 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.

[0022] In the present embodiment, the inner cylindrical sealing plate above the upper ceiling main board 11 is horizontally disconnected upward at the notch and sealedly connected with 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 inner 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 inner angle and the main keel 17 of the main board.

[0023] Among them, the shaped vertical square pipe 44 and the shaped corner square pipe 45 both adapt to the designed distance between the side sealing plate 41 and the main board main keel 17 at their locations, and the shaped vertical square pipe 44, the shaped corner square pipe 45 and the main board main keel 17 are fixedly connected by welding.

[0024] In this embodiment, the ceiling hanging assembly 16 includes a ceiling board keel 161 and a ceiling main board hanging member 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 through ceiling connecting nails 15; the ceiling main board hanging member 162 is an inverted L-shaped member, with an inverted T shape provided at the bottom of the vertical part and correspondingly detachably connected to the ceiling board keel 161, and a hook-shaped part is provided at the top of the horizontal part to hook and connect to the main board main keel 17.

[0025] In this embodiment, the main board main keel 17 is an I-shaped steel member, which is connected to the main structure through the conversion layer column 5; the conversion layer column 5 is a right-angled corner-shaped member; the main board main keel 17 and the inner concave board main keel 18 corresponding to the ceiling main inner concave board 12 are fixedly connected in a stepped manner.

[0026] The main hanger units 2 are correspondingly arranged on the main board main keel 17 and the inner concave board main keel 18, and the top of the main hanger units 2 is connected to the main structure; the main hanger units 2 include main hangers 21, main hanging members 22 provided at the bottom ends of the main hangers 21, and main fastening nuts 23 connecting the main hanging members 22 and the main hangers 21; the main hanging members 22 are in an inverted W shape, with the lower end correspondingly hanging below the main board main keel 17 or the inner concave board main keel 18, and the upper end correspondingly connected above the main board main keel 17 or the inner concave board main keel 18 and fixedly connected through the main fastening nuts 23.

[0027] 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 hanger 33 connected above the grille keel 32; the grille keel 32 is an I-shaped keel; the grille is trapezoidal and is arranged obliquely, with a notch provided on the upper waist side; the grille hanger 33 includes a grille main hanging rod 331, and a grille upper fixing member 332 and a grille lower fixing member 333 connected to the bottom of the grille hanger 33.

[0028] In this embodiment, the grille upper fixing member 332 is a pair of fixing nuts clamped on the upper flange plate of the grille keel 32 and fixedly connected to the grille main hanging rod 331; the grille lower fixing member 333 includes two nuts in the shape of an 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.

[0029] Combined Figures 1 to 9 As shown, the construction method of the large overlapping ceiling structure is further described, and the specific steps are as follows: Step 1: Create a three-dimensional software model based on the dimensions of the ceiling main board 11 and the main inner concave board 12, divide the ceiling main board 11 into strips and label them in the model; and combine the positions of the side sealing plates 41 and the grille positions.

[0030] Step 2: During on-site construction, according to the design plan, the position lines of the main main keel 17, the inner concave plate main keel 18 and the main suspension rod unit 2 are popped up on the top plate; among which, the main keels are arranged in the longitudinal direction of the parallel area, and are arranged from the center of the ceiling to both sides.

[0031] Step three, install the transfer layer, connect the transfer layer columns 5 to the top plate through expansion bolts; and install the main suspension rod unit 2 on the top plate; the top of the main suspension rod 21 is connected to the top plate by bolts, and the main suspension rod 21 is no more than 300mm away from the end of the main keel 17 of the main board.

[0032] Step 4, install the main main keel 17 and the inner concave plate main keel 18 under 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.

[0033] 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.

[0034] Step 5, construct the side sealing unit 4, first construct the side sealing plate 41 at the overlapping part of the upper ceiling main board 11 and the lower ceiling main board 11; before installation, weld the fixed vertical square 44 and the fixed corner 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 panel keel 43 is set, pre-weld it to the transfer layer column 5, and then fix it with the side sealing connecting nails 42.

[0035] Step six, 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, in which the grille body 31 is arranged obliquely; then uniformly level and position the ceiling main board 11, the main inner concave plate 12 of the ceiling and the side sealing plates 41, and fill the corresponding joints; finally, uniformly apply the ceiling coating 13 on the outer sides of the ceiling main board 11, the main inner concave plate 12 of the ceiling and the side sealing plates 41.

[0036] The seams 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 panels are installed with a staggered seam of 300-400mm; all panels must be installed close to the corresponding keel, and 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 plate 41 and the ceiling main board 11 are not more than 1mm recessed into the board surface; Step 7: Finally, the ceiling coating 13 is uniformly applied to the outer sides of the ceiling main board 11 , the ceiling main inner concave board 12 and the side sealing board 41 .

[0037] 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. After it dries, the second layer is applied. Start applying from the edge of the corner. In order to facilitate the next step of scraping, a sufficient amount of material must be applied. Use a 4x4mm toothed scraper to do cross-scraping. The second scraping operation must be parallel to the direction of the main light source. Pull the scraper at a 30° angle until you hear the sound of scraping the board surface, and stop the scraping operation 3cm away from the edge strip. Use a wide trowel to smooth the surface at a 10° angle and evenly, and scrape off as little paint as possible. The smoothing operation starts from the edge and extends to other areas. Repair the burrs on the board after smoothing. 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.

[0038] After the base coat has dried for 36 or 48 hours, the topcoat can be applied. Apply the topcoat from the edge of the ceiling to the surface of the base coat. Use a 4x4mm toothed scraper to do vertical cross-scraping. The second leveling must be parallel to the direction of the main light source. Pull the scraper at a 30° angle until you hear the sound of scraping the board surface. Stop the scraping operation 3cm away from the edge strip. To ensure that the coating thickness is as uniform as possible, the toothed knife scraping operation must always be carried out in the same direction. Each link is operated by the same painter. Use a wide trowel to smooth the surface evenly at a 10° angle, and scrape off as little paint as possible. The smoothing operation starts from the edge and extends to other areas. Depending on the temperature and humidity on site, the leveling process must be carried out within 15-45 minutes, and after completion, use a plastic sheet to scrape off the edge burrs.

[0039] The above description is only a 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 a technician familiar with the technical field can think of within the technical scope disclosed in 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 a 30° angle 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 a 10° angle 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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