Construction method of multi-layer curved screen

Abstract

The present invention discloses a method for constructing a multi-layer curved screen. The method involves dividing the screen into multiple layers, sequentially installing and hoisting them from bottom to top, and then bolting the upper and lower layers together via a connecting structure. By providing a connecting structure at the intersection of the multiple layers and replacing fixed connections with bolts, the present invention avoids stress damage to the screen frame and screen glass, thereby improving the quality of screen installation.

Description

Technical Field

[0001] The invention belongs to the technical field of architectural design, and in particular relates to a construction method of a multi-layer curved screen. Background Art

[0002] Screens are a type of partition that can be found in conference rooms as well as hotels. Currently, the screens used are mostly folding screens or single-layer screens, which are lower than the floor height, lack firmness, and have an ordinary appearance and low quality. In today's rapidly developing world, these ordinary folding screens cannot keep up with the advancement of the times and are not suitable for use in high-end venues. Currently, most screens are single-layer screens, and there are no multi-layer curved screens. Summary of the Invention

[0003] The purpose of the present invention is to overcome the deficiencies in the above-mentioned prior art and to provide a construction method for a multi-layer curved screen by setting a multi-layer curved screen.

[0004] In order to achieve the above invention purpose, the technical solution provided by the patent of this invention is as follows:

[0005] A construction method for a multi-layer curved screen, the method specifically comprising the following steps:

[0006] The first step is to install the bottom steel frame of the first layer of screen, embed expansion bolts in the construction ground where the bottom steel frame of the first layer of screen is installed, and then fix the bottom steel frame of the first layer of screen with expansion bolts;

[0007] The second step is to install the decorative surface on the upper end of the steel frame at the bottom of the first screen after the installation of the steel frame at the bottom of the first screen is completed, and the lower keel is installed on the decorative surface;

[0008] The third step is to install multiple support rods on the lower keel after the installation is completed, and install the screen glass on the support rods;

[0009] Step 4: After the screen glass on the support rod is installed, install the upper keel on the upper end of the support rod to complete the installation of the first layer of screen;

[0010] Step 5: Install the conversion frame on the concrete ceiling at the second-layer screen installation location, and pre-fix the hanger rod on the conversion frame;

[0011] Step 6: Arrange the bottom square steel keel of the second layer of screen on the construction ground, and install multiple support rods on the bottom square steel keel; install the top square steel keel on the upper end of the support rod, then hoist the second layer of screen as a whole above the first layer of screen, and connect and fix the top square steel keel to the hoisting rod;

[0012] Step 7. After the second layer of screen is installed, install the screen glass on the support rod on the second layer of screen to complete the installation of the second layer of screen;

[0013] The eighth step is to install the conversion frame on the concrete ceiling at the installation position of the third-layer screen, and pre-fix the suspension rod on the conversion frame; assemble the third-layer screen on the construction ground, and hang the assembled third-layer screen above the second-layer screen to complete the installation of the third-layer screen.

[0014] The bottom steel frame of the first layer of screen in the first step above is a U-shaped groove structure as a whole, and the lower end face of the bottom steel frame is provided with multiple rows of bolt holes. The expansion bolts embedded in the construction ground are arranged according to the curve form of the bottom steel frame. The expansion bolts embedded in the construction ground pass through the bolt holes of the bottom steel frame respectively, and the bottom steel frame is fixed to the expansion bolts by bolts.

[0015] The decorative surface in the second step has the same shape as the opening at the upper end of the bottom steel frame. The decorative surface is fixedly connected to the bottom steel frame. Multiple rows of bolt holes are opened on the end face of the decorative surface, and the decorative surface is connected and fixed to the lower keel by fixing bolts.

[0016] The above-mentioned lower keel includes a decorative sheet, a metal plate, a U-shaped frame and a lower welded part. The lower keel is arranged along the bottom steel frame. The lower welded part and the decorative sheet form a closed space. The metal plate and the U-shaped frame are arranged in the closed space formed by the lower welded part and the decorative sheet.

[0017] The above-mentioned metal plate is an inverted T-shape as a whole, and bolt holes are provided on both sides of the metal plate, and the fixing bolts on both sides of the decorative surface pass through the bolt holes on both sides of the metal plate to fix the metal plate to the upper end of the decorative surface, and a decorative sheet is provided between the decorative surface and the metal plate, and the width of the decorative sheet is greater than the width of the bottom steel frame, and the decorative sheet is provided with multiple rows of bolt holes and aligned with the bolt holes on both sides of the metal sheet; a plurality of grooves are provided in the middle of the metal plate, and a plurality of through holes are provided in the middle of the U-shaped frame, and the through holes in the middle of the U-shaped frame are aligned with the grooves of the metal plate, and the two side frames of the U-shaped frame face the metal plate, and a lower joint welded part is provided at the upper end of the U-shaped frame, and the lower joint welded part has a U-shaped groove as a whole, and the width of the lower joint welded part is the same as the width of the decorative sheet, and a plurality of through holes are provided in the middle of the lower joint welded part, and the through holes on the lower joint welded part correspond one-to-one with the U-shaped frame.

[0018] The support rod in the above-mentioned third step is cylindrical in shape as a whole. The lower end of the support rod passes through the lower welded part and the U-shaped frame and is inserted into the middle groove of the metal plate. The metal plate is threadedly connected to the support rod. Metal inner tubes are provided at the upper and lower ends of the support rod, and the support rods are parallel to each other.

[0019] The upper keel in the fourth step includes a cover plate, an upper welded part and a U-shaped frame. The upper welded part is in a U-shaped groove as a whole. The end face of the upper welded part is provided with multiple through holes. The through holes on the upper welded part are respectively connected to the upper end of the support part. The reverse edges are welded on both sides of the upper welded part. The cover plate is connected to the reverse edges by bolts. The cover plate seals the upper end of the upper welded part. The U-shaped frame is installed in the groove of the upper welded part, and the U-shaped groove of the U-shaped frame faces upward.

[0020] The above-mentioned reverse edge is 1.5 mm lower than the upper end of the upper welded part. The upper end of the support rod passes through the through hole of the upper welded part and the through hole of the U-shaped frame, and the upper end of the support rod is connected and fixed to the U-shaped frame by bolts; a plurality of reinforcing ribs are also evenly arranged in the U-shaped groove of the U-shaped frame, and the reinforcing ribs are vertically connected to the bottom of the U-shaped frame.

[0021] A conversion layer is also provided on the concrete ceiling in the fifth step above, and the conversion layer includes an angle iron conversion rod and a conversion plate. The conversion plate is connected to the concrete ceiling through the angle iron conversion rod. According to the installation positions of the second-layer screen and the third-layer screen, a conversion frame is provided on the conversion plate on the upper part of the second-layer screen and the third-layer screen. The conversion frame is arranged in the curved form of the second-layer screen and the third-layer screen. A plurality of hangers are provided on the conversion frame, and the hangers are respectively connected to the upper frames of the second-layer screen and the third-layer screen.

[0022] The structure of the bottom square keel of the second layer of screen in the sixth step is the same as the structure of the upper keel of the first layer of screen, the connection between the bottom square keel and the support rod is the same as the connection structure between the upper keel and the support rod, the cover plate and the upper welded part in the top square steel keel of the second layer of screen are the same as the cover plate and the upper welded part in the bottom square keel of the second layer of screen, and a hanger fixing groove is also provided in the middle of the U-shaped frame in the top square steel keel of the second layer of screen, which is used to fix the top square steel keel of the second layer of screen to the hanger.

[0023] When the above-mentioned second-layer screen is installed, the square steel keel at the top of the second-layer screen is connected to the hanger, and a connecting structure is set at the overlapping point of the square keel at the bottom of the second-layer screen and the first-layer screen; the connecting structure includes a metal positioning plate and a connecting bolt, the metal positioning plate is set at the bottom of the square keel at the bottom of the second-layer screen, and the metal positioning plate is provided with a bolt hole. The upper part of the upper keel of the first-layer screen is provided with a connecting bolt, and the first-layer screen and the second-layer screen are connected by the connecting bolt and the positioning metal plate; a connecting structure is also set at the overlapping point of the bottom of the third-layer screen and the upper end of the second-layer screen.

[0024] The above-mentioned first layer of screens is provided with multiple screens, and the upper keels of adjacent first-layer screens are connected, and square tubes are provided on the U-shaped frames on the sides of the upper keels of adjacent first-layer screens, and bolt holes are provided on the square tubes, and the adjacent upper keels are connected by bolts, and positioning metal sheets are provided on both sides of the U-shaped frames on the sides of the upper keels. When the upper keels of adjacent first-layer screens are connected, the positioning metal sheets are inserted into both sides of the U-shaped frames; the square tube structure provided on the sides of the upper keels and lower keels of adjacent second-layer screens is the same as the square tube structure provided on the first-layer screen; the square tube structure provided on the sides of the upper keels and lower keels of the adjacent third-layer screen is the same as the square tube structure provided on the first-layer screen.

[0025] The installation steps of the third layer of screen and the third layer of screen glass are the same as the installation steps of the second layer of screen and the second layer of screen glass.

[0026] Based on the above technical solution, the construction method of a multi-layer curved screen patented by the present invention has achieved the following technical advantages through practical application:

[0027] 1. The construction method of the multi-layer curved screen of the present invention sets a connection structure at the overlapping points of the multi-layer screen, replaces the fixed connection with a bolt connection, avoids stress damage to the screen frame and the screen glass, and improves the quality of the screen installation.

[0028] 2. The construction method of the multi-layer curved screen of the present invention is to pre-assemble the second-layer screen and the third-layer screen and then hoist them. The top is connected to the indoor ceiling through a hanger, and the bottom is connected to the lower screen, thereby improving the stability of the upper screen installation and reducing the difficulty of multi-layer screen installation.

[0029] 3. The construction method of the multi-layer curved screen of the present invention divides the screen on the same layer into multiple screen segments for production, which reduces the difficulty of overall production and installation. At the same time, the screens on the same layer are connected by setting a connecting structure, which improves the installation stability of the screens on the same layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1It is a cross-sectional view of a multi-layer curved screen in a construction method of the present invention.

[0031] Figure 2 This is a structural diagram of the first layer of screen in a construction method of a multi-layer curved screen according to the present invention.

[0032] Figure 3 This is a construction method of a multi-layer curved screen of the present invention. Figure 2 Middle AA section view.

[0033] Figure 4 This is a structural diagram of the second and third layers of screens in a construction method of a multi-layer curved screen according to the present invention.

[0034] Figure 5 This is a construction method of a multi-layer curved screen of the present invention. Figure 4 Middle BB cross-section view.

[0035] Figure 6 This is a connection diagram of screen frames on the same layer in a construction method of a multi-layer curved screen according to the present invention.

[0036] Figure 7 It is a schematic diagram of the connection structure of upper and lower screens in a construction method of a multi-layer curved screen according to the present invention. DETAILED DESCRIPTION

[0037] To make the objectives, technical solutions, and advantages of the present invention more clearly apparent, the present invention is described below using specific examples shown in the accompanying drawings. However, it should be understood that these descriptions are merely illustrative and are not intended to limit the scope of the present invention. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessary confusion of the concepts of the present invention.

[0038] like Figure 1-7 The present invention relates to a method for constructing a multi-layer curved screen, which specifically comprises the following steps:

[0039] The first step is to install the bottom steel frame 11 of the first layer of screen 1, embed expansion bolts 111 in the construction ground where the bottom steel frame 11 of the first layer of screen 1 is installed, and then fix the bottom steel frame 11 of the first layer of screen 1 with the expansion bolts 111;

[0040] In the second step, after the installation of the bottom steel frame 11 of the first layer of screen 1 is completed, a decorative surface is installed on the upper end surface of the bottom steel frame 11 of the first layer of screen 1, and the lower keel 12 is installed on the decorative surface;

[0041] In the third step, after the lower keel 12 is installed, a plurality of support rods 13 are installed on the lower keel 12, and screen glasses are installed on the support rods 13;

[0042] Step 4: After the screen glass on the support rod 13 is installed, the upper keel 14 is installed on the upper end of the support rod 13 to complete the installation of the first layer of screen 1;

[0043] Step 5: Install the conversion frame 44 on the concrete ceiling 41 at the second-layer screen installation location, and pre-fix the hanger on the conversion frame 44;

[0044] Step 6: Arrange the bottom square steel keel of the second layer screen on the construction ground, and install multiple support rods 13 on the bottom square steel keel; install the top square steel keel on the upper end of the support rod 13, and then hoist the second layer screen as a whole above the first layer screen 1, and connect and fix the top square steel keel to the hoisting rod;

[0045] Step 7: After the second layer of screen is installed, install the screen glass on the support rod 13 on the second layer of screen to complete the installation of the second layer of screen;

[0046] The eighth step is to install the conversion frame 44 on the concrete ceiling 41 at the installation position of the third-layer screen, and pre-fix the suspension rod on the conversion frame 44; assemble the third-layer screen on the construction ground, and hang the assembled third-layer screen above the second-layer screen to complete the installation of the third-layer screen.

[0047] The bottom steel frame 11 of the first layer of screen 1 in the first step above is a U-shaped groove structure as a whole, and the lower end face of the bottom steel frame 11 is provided with multiple rows of bolt holes, and the expansion bolts 111 embedded in the construction ground are arranged according to the curve form of the bottom steel frame 11. The expansion bolts 111 embedded in the construction ground pass through the bolt holes of the bottom steel frame 11 respectively, and the bottom steel frame 11 and the expansion bolts 111 are fixed by bolts.

[0048] The decorative surface in the second step has the same shape as the upper opening of the bottom steel frame 11. The decorative surface is fixedly connected to the bottom steel frame 11. Multiple rows of bolt holes are opened on the end face of the decorative surface, and the decorative surface is connected and fixed to the lower keel 12 by fixing bolts.

[0049] The above-mentioned lower keel 12 includes a decorative piece 121, a metal plate 122, a U-shaped frame 124 and a lower joint weld 123. The lower keel 12 is arranged along the bottom steel frame 11. The lower joint weld 123 and the decorative piece 121 form a closed space. The metal plate 122 and the U-shaped frame 124 are arranged in the closed space formed by the lower joint weld 123 and the decorative piece 121.

[0050] The above-mentioned metal plate 122 is in an inverted T shape as a whole. Bolt holes are provided on both sides of the metal plate 122. The fixing bolts on both sides of the decorative surface pass through the bolt holes on both sides of the metal plate 122 to fix the metal plate 122 to the upper end of the decorative surface. A decorative sheet 121 is provided between the decorative surface and the metal plate 122. The width of the decorative sheet 121 is greater than the width of the bottom steel frame 11. The decorative sheet 121 is provided with multiple rows of bolt holes and aligned with the bolt holes on both sides of the metal sheet; a plurality of grooves are provided in the middle of the metal plate 122. A plurality of through holes are provided in the middle of the U-shaped frame 124, and the through holes in the middle of the U-shaped frame 124 are aligned with the grooves of the metal plate 122. The frames on both sides of the U-shaped frame 124 face the metal plate 122. A lower joint weld 123 is provided at the upper end of the U-shaped frame 124, and the lower joint weld 123 is a U-shaped groove as a whole. The width of the lower joint weld 123 is the same as the width of the decorative sheet 121. A plurality of through holes are provided in the middle of the lower joint weld 123, and the through holes on the lower joint weld 123 correspond one-to-one with the U-shaped frame 124.

[0051] The support rod 13 in the above-mentioned third step is cylindrical in shape as a whole. The lower end of the support rod 13 passes through the lower joint weld 123 and the U-shaped frame 124 and is inserted into the middle groove of the metal plate 122. The metal plate 122 is threadedly connected to the support rod 13. Metal inner tubes are provided at the upper and lower ends of the support rod 13, and the support rods 13 are parallel to each other.

[0052] The upper keel 14 in the fourth step includes a cover plate 141, an upper joint weld 142 and a U-shaped frame 124. The upper joint weld 142 is a U-shaped groove as a whole. The end face of the upper joint weld 142 is provided with multiple through holes. The through holes on the upper joint weld 142 are respectively connected to the upper end of the support member. The upper joint weld 142 is welded with reverse edges on both sides. The cover plate 141 is connected to the reverse edges by bolts. The cover plate 141 seals the upper end of the upper joint weld 142. The U-shaped frame 124 is installed in the groove of the upper joint weld 142, and the U-shaped groove of the U-shaped frame 124 faces upward.

[0053] The above-mentioned reverse edge is 1.5 mm lower than the upper end of the upper joint weld 142. The upper end of the support rod 13 passes through the through hole of the upper joint weld 142 and the through hole of the U-shaped frame 124, and the upper end of the support rod 13 is connected and fixed to the U-shaped frame 124 by bolts; a plurality of reinforcing ribs are also evenly arranged in the U-shaped groove of the U-shaped frame 124, and the reinforcing ribs are vertically connected to the bottom of the U-shaped frame 124.

[0054] A conversion layer is also provided on the concrete ceiling 41 in the fifth step above, and the conversion layer includes an angle iron conversion rod 42 and a conversion plate 43. The conversion plate 43 is connected to the concrete ceiling 41 through the angle iron conversion rod 42. According to the installation positions of the second-layer screen and the third-layer screen, a conversion frame 44 is provided on the conversion plate 43 on the upper part of the second-layer screen and the third-layer screen. The conversion frame 44 is arranged in a curved form according to the second-layer screen and the third-layer screen. A plurality of hangers are provided on the conversion frame 44, and a ceiling 45 is provided at the bottom of the hanger. The ceiling 45 is connected to the conversion plate, and the hangers are respectively connected to the upper frames of the second-layer screen and the third-layer screen.

[0055] The structure of the bottom square keel of the second layer of screen in the above sixth step is the same as the structure of the upper keel 14 of the first layer of screen 1, the connection between the bottom square keel and the support rod 13 is the same as the connection structure of the upper keel 14 and the support rod 13, the cover plate 141 and the upper welded part 142 in the top square steel keel of the second layer of screen are the same as the cover plate 141 and the upper welded part 142 in the bottom square keel of the second layer of screen, and a hanger fixing groove is also provided in the middle of the U-shaped frame 124 in the top square steel keel of the second layer of screen, which is used to fix the top square steel keel of the second layer of screen to the hanger.

[0056] When the above-mentioned second-layer screen is installed, the square steel keel at the top of the second-layer screen is connected to the hanger, and a connecting structure is set at the overlapping point of the square keel at the bottom of the second-layer screen and the first-layer screen 1; the connecting structure includes a metal positioning plate 61 and a connecting bolt 62, the metal positioning plate 61 is set at the bottom of the square keel at the bottom of the second-layer screen, and the metal positioning plate 61 is provided with a bolt hole, and the upper part of the upper keel 14 of the first-layer screen 1 is provided with a connecting bolt 62, and the first-layer screen 1 and the second-layer screen are connected by the connecting bolt 62 and the positioning metal plate; a connecting structure is also set at the overlapping point of the bottom of the third-layer screen and the upper end of the second-layer screen.

[0057] The above-mentioned first layer of screens 1 is provided with multiple screens, and the upper keels 14 of adjacent first-layer screens 1 are connected. Square tubes 51 are provided on the U-shaped frames 124 on the sides of the upper keels 14 of adjacent first-layer screens 1, and bolt holes are provided on the square tubes 51. The adjacent upper keels 14 are connected by bolts, and positioning metal sheets 52 are provided on both sides of the U-shaped frames 124 on the sides of the upper keels 14. When the upper keels 14 of adjacent first-layer screens 1 are connected, the positioning metal sheets 52 are inserted into both sides of the U-shaped frames 124; the square tubes 51 structure provided on the sides of the upper keels 14 and lower keels 12 of the adjacent second-layer screens are the same as the square tubes 51 structure provided on the first-layer screen 1; the square tubes 51 structure provided on the sides of the upper keels 14 and lower keels 12 of the adjacent third-layer screens are the same as the square tubes 51 structure provided on the first-layer screen 1; by providing the positioning metal sheets 52, the stability of the connection between the screens on the same layer is improved, and the screen docking and installation is convenient.

[0058] The installation steps of the third layer of screen and the third layer of screen glass are the same as the installation steps of the second layer of screen and the second layer of screen glass.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solutions of the present invention. They should all be included in the scope of the technical solutions for which protection is sought in the present invention.

Claims

1. A construction method for a multi-layer curved screen, characterized in that: The method specifically comprises the following steps: The first step is to install the bottom steel frame of the first layer of screen, embed expansion bolts in the construction ground where the bottom steel frame of the first layer of screen is installed, and then fix the bottom steel frame of the first layer of screen with expansion bolts; The second step is to install the decorative surface on the upper end of the steel frame at the bottom of the first screen after the installation of the steel frame at the bottom of the first screen is completed, and the lower keel is installed on the decorative surface; The third step is to install multiple support rods on the lower keel after the installation is completed, and install the screen glass on the support rods; Step 4: After the screen glass on the support rod is installed, install the upper keel on the upper end of the support rod to complete the installation of the first layer of screen; The first layer of screens is provided with a plurality of screens, and the upper keels of adjacent first layer screens are connected, and square tubes are provided on the U-shaped frames on the sides of the upper keels of adjacent first layer screens, and bolt holes are provided on the square tubes, and the adjacent upper keels are connected by bolts, and positioning metal sheets are provided on both sides of the U-shaped frames on the sides of the upper keels. When the upper keels of adjacent first layer screens are connected, the positioning metal sheets are inserted into both sides of the U-shaped frames; the square tube structure provided on the sides of the upper keels and lower keels of adjacent second layer screens is the same as the square tube structure provided on the first layer screen; the square tube structure provided on the sides of the upper keels and lower keels of adjacent third layer screens is the same as the square tube structure provided on the first layer screen; Step 5: Install the conversion frame on the concrete ceiling at the second-layer screen installation location, and pre-fix the hanger rod on the conversion frame; Step 6: Arrange the bottom square steel keel of the second layer of screen on the construction ground, and install multiple support rods on the bottom square steel keel; install the top square steel keel on the upper end of the support rod, then hoist the second layer of screen as a whole above the first layer of screen, and connect and fix the top square steel keel to the hoisting rod; The structure of the bottom square keel of the second layer of screen in the sixth step is the same as the structure of the upper keel of the first layer of screen, the connection structure between the bottom square keel and the support rod is the same as the connection structure between the upper keel and the support rod, the cover plate and the upper welded part in the top square steel keel of the second layer of screen are the same as the cover plate and the upper welded part in the bottom square keel of the second layer of screen, and a hanger fixing groove is further provided in the middle of the U-shaped frame of the top square steel keel of the second layer of screen for fixedly connecting the top square steel keel of the second layer of screen to the hanger; Step 7. After the second layer of screen is installed, install the screen glass on the support rod on the second layer of screen to complete the installation of the second layer of screen; When the second layer of screen is installed, the square steel keel at the top of the second layer of screen is connected to the hanger, and a connecting structure is provided at the point where the square keel at the bottom of the second layer of screen coincides with the first layer of screen; the connecting structure includes a metal positioning piece and a connecting bolt, the metal positioning piece is provided at the bottom of the square keel at the bottom of the second layer of screen, a bolt hole is provided on the metal positioning piece, a connecting bolt is provided on the upper part of the upper keel of the first layer of screen, and the first layer of screen and the second layer of screen are connected by the connecting bolt and the metal positioning piece; a connecting structure is also provided at the point where the bottom of the third layer of screen coincides with the upper end of the second layer of screen; Step 8: Install the conversion frame on the concrete ceiling at the installation location of the third-layer screen, and pre-fix the hanger on the conversion frame; assemble the third-layer screen on the construction ground, and hang the assembled third-layer screen above the second-layer screen to complete the installation of the third-layer screen; The installation steps of the third layer of screen and the third layer of screen screen glass are the same as the installation steps of the second layer of screen and the second layer of screen screen glass.

2. The construction method of a multi-layer curved screen according to claim 1, characterized in that: The bottom steel frame of the first layer of screen in the first step is a U-shaped groove structure as a whole, and the lower end face of the bottom steel frame is provided with multiple rows of bolt holes. The expansion bolts embedded in the construction ground are arranged according to the curve form of the bottom steel frame. The expansion bolts embedded in the construction ground pass through the bolt holes of the bottom steel frame respectively, and the bottom steel frame is fixed to the expansion bolts by bolts.

3. The construction method of a multi-layer curved screen according to claim 1, characterized in that: The decorative surface in the second step has the same shape as the opening at the upper end of the bottom steel frame. The decorative surface is fixedly connected to the bottom steel frame. Multiple rows of bolt holes are opened on the end surface of the decorative surface, and the decorative surface is connected and fixed to the lower keel by fixing bolts.

4. The construction method of a multi-layer curved screen according to claim 3, characterized in that: The lower keel includes a decorative sheet, a metal plate, a U-shaped frame and a lower welded part. The lower keel is arranged along the bottom steel frame. The lower welded part and the decorative sheet form a closed space. The metal plate and the U-shaped frame are arranged in the closed space formed by the lower welded part and the decorative sheet.

5. The construction method of a multi-layer curved screen according to claim 4, characterized in that: The metal plate is in an inverted T-shape as a whole, and bolt holes are provided on both sides of the metal plate. The fixing bolts on both sides of the decorative surface pass through the bolt holes on both sides of the metal plate to fix the metal plate to the upper end of the decorative surface. A decorative sheet is provided between the decorative surface and the metal plate. The width of the decorative sheet is greater than the width of the bottom steel frame. The decorative sheet is provided with multiple rows of bolt holes and is aligned with the bolt holes on both sides of the metal plate; a plurality of grooves are provided in the middle of the metal plate, a plurality of through holes are provided in the middle of the U-shaped frame, the through holes in the middle of the U-shaped frame are aligned with the grooves of the metal plate, and the two side frames of the U-shaped frame face the metal plate. A lower joint welded part is provided at the upper end of the U-shaped frame, and the lower joint welded part is in a U-shaped groove as a whole. The width of the lower joint welded part is the same as the width of the decorative sheet. A plurality of through holes are provided in the middle of the lower joint welded part, and the through holes on the lower joint welded part correspond one-to-one with the U-shaped frame.

6. The construction method of a multi-layer curved screen according to claim 4, characterized in that: The support rod in the third step is cylindrical in shape as a whole. The lower end of the support rod passes through the lower welded part and the U-shaped frame and is inserted into the middle groove of the metal plate. The metal plate is threadedly connected to the support rod. Metal inner tubes are provided at the upper and lower ends of the support rod, and the support rods are parallel to each other.

7. The construction method of a multi-layer curved screen according to claim 1, characterized in that: The upper keel in the fourth step includes a cover plate, an upper welded part and a U-shaped frame. The upper welded part is in a U-shaped groove as a whole. The end face of the upper welded part is provided with multiple through holes. The through holes on the upper welded part are respectively connected to the upper end of the support part. The reverse edges are welded on both sides of the upper welded part. The cover plate is connected to the reverse edges by bolts. The cover plate seals the upper end of the upper welded part. The U-shaped frame is installed in the groove of the upper welded part, and the U-shaped groove of the U-shaped frame faces upward.

8. The construction method of a multi-layer curved screen according to claim 7, characterized in that: The reverse edge is 1.5 mm lower than the upper end of the upper welded part. The upper end of the support rod passes through the through hole of the upper welded part and the through hole of the U-shaped frame, and the upper end of the support rod is connected and fixed to the U-shaped frame by bolts; a plurality of reinforcing ribs are also evenly arranged in the U-shaped groove of the U-shaped frame, and the reinforcing ribs are vertically connected to the bottom of the U-shaped frame.

9. The construction method of a multi-layer curved screen according to claim 1, characterized in that: A conversion layer is also provided on the concrete ceiling in the fifth step, and the conversion layer includes an angle iron conversion rod and a conversion plate. The conversion plate is connected to the concrete ceiling through the angle iron conversion rod. According to the installation positions of the second-layer screen and the third-layer screen, a conversion frame is provided on the conversion plate on the upper part of the second-layer screen and the third-layer screen. The conversion frame is arranged according to the curved form of the second-layer screen and the third-layer screen. A plurality of hangers are provided on the conversion frame, and a ceiling is provided at the bottom of the hangers. The ceiling is connected to the conversion plate, and the hangers are respectively connected to the upper frames of the second-layer screen and the third-layer screen.

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