A double-arc metal roof panel installation structure and construction method based on BIM technology

Abstract

The application relates to the technical field of roof panel installation, in particular to a double-arc metal roof panel installation structure based on BIM technology and a construction method thereof, which comprises a roof panel body and two keel frames, the two sides of the two keel frames are provided with clamping grooves, the two ends of the roof panel body are fixedly provided with mounting plates, the mounting plates are fixedly provided with a plurality of clamping blocks, strip-shaped holes are formed in the clamping blocks, the clamping blocks are inserted into the clamping grooves, a plurality of positioning holes penetrating through the keel frames are formed in the surface of the keel frame, fastening screws are arranged in the positioning holes, and fastening nuts are threadedly connected to one end of the fastening screws. When the roof panel is deformed due to temperature influence, the clamping blocks and the fastening screws can relatively displace under the action of the strip-shaped holes, a certain displacement space is ensured for the clamping blocks in the process of expansion and contraction deformation, roof panel cracking is effectively avoided, and the service life of the roof panel is prolonged.

Description

Technical Field

[0001] This invention relates to the field of roof panel installation technology, and in particular to a double-arc metal roof panel installation structure and construction method based on BIM technology. Background Technology

[0002] BIM technology is not just about integrating digital information, but about applying it. When installing roof panels, 3D real-time modeling technology can be used to guide the installation process in real time according to the construction plan, which can speed up the construction progress and avoid construction errors. In the selection of double-curved roof panels, polycarbonate sheets are the preferred material due to their good light transmission, flexibility, and convenient and quick installation. During installation, polycarbonate sheets are fixed to the keel frame with fixing screws to form the roof.

[0003] However, polycarbonate sheets are solid sheets, and temperature can cause them to expand and contract during use. During this expansion and contraction, the polycarbonate sheet and the fixing screws will shift relative to each other, causing the sheet to crack and reducing its service life. Summary of the Invention

[0004] The purpose of this invention is to address the following shortcomings in the prior art: during the use of roof panels, expansion and contraction deformation occurs, and during this process, the polycarbonate sheet and the fixing screws are displaced, causing the sheet to crack and reducing the service life of the roof panels. Therefore, this invention proposes a double-arc metal roof panel installation structure based on BIM technology.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A BIM-based double-arc metal roof panel installation structure includes a roof panel body and two keel frames. Each of the two keel frames has slots on both sides. Mounting plates are fixedly installed at both ends of the roof panel body. Multiple locking blocks are fixedly installed on the mounting plates. Each locking block has a slotted hole and is inserted into the slot. Multiple positioning holes, penetrating the keel frame, are provided on the surface of the keel frame. The positioning holes are aligned with the slotted holes. Fastening screws are installed in the positioning holes, with one end of each screw passing through the slotted hole and threaded with a fastening nut.

[0007] Multiple mounting slots are provided inside the upper and lower sides of the card slot. The multiple mounting slots are located near multiple positioning holes. A first telescopic spring is fixedly installed in the mounting slot. A cylindrical block is fixedly installed at the end of the first telescopic spring away from the mounting slot. A spherical groove is provided at one end of the cylindrical block. A ball bearing is rolled and embedded in the spherical groove. The multiple balls bearings roll and contact the upper and lower surfaces of the multiple card blocks respectively.

[0008] As a preferred embodiment, the side of the card block has a rectangular hole communicating with the strip hole. Multiple rectangular rods are horizontally fixedly installed in the card slot. One end of each rectangular rod is slidably inserted into a rectangular hole on the card block. A movable disk is sleeved on the rectangular rod, and a second telescopic spring is sleeved on the movable rod. The two ends of the second telescopic spring are fixedly connected to the surface of the movable disk and the inner wall of the card slot, respectively. A movable hole is opened on the rectangular rod, and a movable block is horizontally slidably installed in the movable hole through a sliding component. Limiting components for restricting the card block are provided at both the upper and lower ends of the movable block.

[0009] As a preferred embodiment, the sliding assembly includes a slide rail horizontally fixedly installed in the moving hole and a third telescopic spring sleeved on the slide rail. The moving block is slidably sleeved on the slide rail, and the two ends of the third telescopic spring are fixedly connected to the inner wall of the moving hole and the surface of the moving block, respectively.

[0010] As a preferred embodiment, the moving block has rectangular slots at both its upper and lower ends. The limiting component includes a fourth telescopic spring fixedly installed in the rectangular slot and a trapezoidal limiting block fixedly installed at one end of the fourth telescopic spring. The trapezoidal limiting block is slidably installed in the rectangular slot, and the side of the trapezoidal limiting block contacts the inner wall of the strip hole.

[0011] As a preferred embodiment, the elastic coefficient of the second telescopic spring is the same as that of the third telescopic spring, and the inclined surface of the trapezoidal limiting block faces away from the moving disk.

[0012] As a preferred embodiment, strip rods are fixedly installed on both the upper and lower surfaces of the mounting plate. Each of the two strip rods has a cavity inside. A sealing airbag is fixedly installed on the strip rod. Multiple inflation holes, all connected to the sealing airbag, are opened on the inner wall of the cavity. The surface of the sealing airbag is in contact with the surface of the keel frame and the surface of the mounting plate.

[0013] As a preferred embodiment, the mounting plate has multiple air chambers inside, and each of the multiple air chambers has two air inlets that are respectively connected to the cavities of the two strip rods. A push plate is horizontally and slidably installed inside the air chamber, and the two air inlets are located on the side of the push plate near the strip holes. The mounting plate is provided with a transmission component for driving the push plate to move.

[0014] As a preferred embodiment, the sidewall of the strip-shaped hole is provided with a sliding hole that communicates with the air chamber. The transmission assembly includes a slide rod that is slidably installed in the sliding hole and a transmission ring that is fixedly installed at one end of the slide rod. The end of the slide rod away from the transmission ring is fixedly connected to the push plate, and the transmission ring is sleeved on the fastening screw.

[0015] As a preferred embodiment, the end of the push plate away from the strip hole and the air chamber form a sealed space, and a conical block is fixedly installed at the lower end of the fastening screw.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. The installation of the roof panel is completed by inserting the mounting plate and multiple clips into the slots, and then installing the clips on the keel frame with fastening screws and nuts. When the roof panel deforms due to temperature, the clips and fastening screws can move relative to each other under the action of the slots, ensuring that there is a certain displacement space for the clips during the expansion and contraction deformation process, effectively preventing the roof panel from cracking and improving the service life of the roof panel.

[0018] 2. When the card block is installed in the card slot, the card block can be clamped in the card slot by the cooperation of the first telescopic spring, the cylindrical block and the ball. This reduces the friction between the card block and the card slot, making it easier for the card block to move horizontally in the card slot and preventing the friction from affecting the expansion and contraction deformation of the roof panel.

[0019] 3. When the temperature effect on the roof panel decreases, the roof panel can easily return to its original shape through the cooperation of the rectangular rod, the second telescopic spring, the moving plate, the sliding component, the moving block, and the limiting component. This allows the locking block to return to its initial position, so that when the temperature affects the roof panel again, the roof panel can deform repeatedly, further improving the service life of the roof panel.

[0020] 4. The sealing airbag is filled with gas and is in an expanded state. When the mounting plate and the clip are inserted into the slot, the sealing airbag will come into contact with the keel frame and the mounting plate, thereby blocking the gap between the mounting plate and the keel frame, preventing rainwater from seeping in and avoiding the risk of water leakage.

[0021] 5. When the card block and the mounting plate move within the slot, the size of the sealing airbag can be changed by the cooperation of the transmission component, the push plate, the air chamber and the air inlet, so that it can just block the gap between the keel frame and the mounting plate, preventing the sealing airbag from being too large and affecting the movement of the card block, or too small and affecting the sealing performance. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the double-arc metal roof panel installation structure of the present invention;

[0023] Figure 2 This is a three-dimensional partial structural diagram of the double-arc metal roof panel installation structure of the present invention;

[0024] Figure 3 An exploded three-dimensional structural diagram of the mounting plate, clips, frame, and fastening screws;

[0025] Figure 4 A schematic diagram of the planar structure of the mounting plate, clips, frame, and fastening screws;

[0026] Figure 5 A partial sectional view of the mounting plate, clips, frame, and fastening screws.

[0027] Figure 6 for Figure 5 Enlarged structural diagram at point A in the middle;

[0028] Figure 7 for Figure 5 Enlarged structural diagram at point B;

[0029] Figure 8 for Figure 5 Enlarged structural diagram at point C.

[0030] In the picture:

[0031] 1. Roof panel body, 2. Keel frame, 3. Slot, 4. Mounting plate, 5. Clip block, 6. Strip hole, 7. Positioning hole, 8. Fastening screw, 9. Fastening nut, 10. First telescopic spring, 11. Cylindrical block, 12. Ball bearing, 13. Rectangular rod, 14. Moving plate, 15. Second telescopic spring, 16. Moving block, 17. Slide rail, 18. Third telescopic spring, 19. Moving hole, 20. Rectangular groove, 21. Fourth telescopic spring, 22. Trapezoidal limit block, 23. Strip rod, 24. Sealing airbag, 25. Air chamber, 26. Push plate, 27. Slide rod, 28. Transmission ring, 29. Conical block. Detailed Implementation

[0032] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0033] Reference Figures 1-8 A BIM-based double-arc metal roof panel installation structure includes a roof panel body 1 and two keel frames 2. The two keel frames 2 have slots 3 on both sides. The roof panel body 1 has mounting plates 4 fixedly installed at both ends. Multiple clips 5 are fixedly installed on the mounting plates 4. Each clip 5 has a strip hole 6. The clips 5 are inserted into the slots 3. The surface of the keel frame 2 has multiple positioning holes 7 that penetrate the keel frame 2. The positioning holes 7 are aligned with the strip holes 6. The positioning holes 7 have fastening screws 8. One end of the fastening screw 8 passes through the strip hole 6 and is threaded with a fastening nut 9.

[0034] When installing the roof panel onto the keel frame 2, the mounting plate 4 and multiple clips 5, which are fixed to the roof panel, are inserted into the slot 3. During insertion, the strip hole 6 on the clip 5 and the positioning hole 7 are on the same vertical plane until the strip hole 6 and the positioning hole 7 are aligned. Then, the fastening screw 8 is passed through the positioning hole 7 and the strip hole 6 in sequence, and then the fastening nut 9 is threaded onto one end of the fastening screw 8, thus completing the installation of the roof panel. After the roof panel is installed, the clip 5 can move within the slot 3, and the fastening screw 8 undergoes relative displacement within the strip hole 6. This ensures that the clip 5 has a certain displacement space during the expansion and contraction deformation of the roof panel, effectively preventing the roof panel from cracking and improving the service life of the roof panel.

[0035] Multiple mounting slots are provided inside the upper and lower sides of the slot 3. The multiple mounting slots are located near the multiple positioning holes 7. A first telescopic spring 10 is fixedly installed in the mounting slot. A cylindrical block 11 is fixedly installed at the end of the first telescopic spring 10 away from the mounting slot. A spherical groove is provided at one end of the cylindrical block 11. A ball bearing 12 is rolled and embedded in the spherical groove. The multiple balls bearing 12 roll and contact the upper and lower surfaces of the multiple slot blocks 5 respectively.

[0036] When the card block 5 is inserted into the card slot 3, both the upper and lower surfaces of the card block 5 will contact multiple balls 12. Under the action of the arc surface of the balls 12, the cylindrical block 11 will move into the mounting groove. The first telescopic spring 10 is compressed. When the card block 5 moves in the card slot 3, the balls 12 can reduce the friction between the card block 5 and the card slot 3.

[0037] The side of the locking block 5 has a rectangular hole communicating with the strip hole 6. Multiple rectangular rods 13 are horizontally fixedly installed in the locking groove 3. One end of each rectangular rod 13 is slidably inserted into a rectangular hole on the locking block 5. A movable disk 14 is sleeved on each rectangular rod 13, and a second telescopic spring 15 is sleeved on each rectangular rod 13. Both ends of the second telescopic spring 15 are fixedly connected to the surface of the movable disk 14 and the inner wall of the locking groove 3, respectively. A movable hole 19 is provided on each rectangular rod 13. A movable block 16 is horizontally slidably installed in the movable hole 19 via a sliding assembly. Limiting components for the locking blocks 5 are provided at both the upper and lower ends of the movable block 16. The sliding assembly includes a slide rail 17 horizontally fixedly installed in the movable hole 19 and... A third telescopic spring 18 is sleeved on the slide rail 17, and a moving block 16 is slidably sleeved on the slide rail 17. The two ends of the third telescopic spring 18 are fixedly connected to the inner wall of the moving hole 19 and the surface of the moving block 16, respectively. Rectangular grooves 20 are provided at both the upper and lower ends of the moving block 16. The limiting component includes a fourth telescopic spring 21 fixedly installed in the rectangular groove 20 and a trapezoidal limiting block 22 fixedly installed at one end of the fourth telescopic spring 21. The trapezoidal limiting block 22 is slidably installed in the rectangular groove 20. The side of the trapezoidal limiting block 22 contacts the inner wall of the strip hole 6. The elastic coefficient of the second telescopic spring 15 is the same as that of the third telescopic spring 18. The inclined surface of the trapezoidal limiting block 22 faces away from the moving disk 14.

[0038] The slide rail 17 supports the movable block 16. The movable block 16 can move horizontally in the movable hole 19 through the slide rail 17, and under the action of the elastic force of the third telescopic spring 18, the movable block 16 contacts the end of the movable hole 19 near the movable disk 14.

[0039] The distance between the two trapezoidal limiting blocks 22 and the end away from the fourth telescopic spring 21 is greater than the width of the rectangular hole. When the locking block 5 is inserted into the locking slot 3, one end of the rectangular rod 13 will be inserted into the rectangular hole on the locking block 5, and the other end will pass through the strip hole 6 on the locking block 5. The sides of the two trapezoidal limiting blocks 22 are in contact with the inner wall of the strip hole 6. Under the elastic force of the second telescopic spring 15, the moving disk 14 is in contact with the side of the locking block 5. When the locking block 5 moves horizontally in the locking slot 3, the rectangular rod 13 will move in the rectangular hole, thereby driving the second telescopic spring 15 or the third telescopic spring 18 to compress. When the locking block 5 moves away from the locking slot 3, it will drive the moving block 16 to move on the slide rail 17 through the two trapezoidal limiting blocks 22. The third telescopic spring 18 is compressed. When the locking block 5 moves into the locking slot 3, the locking block 5 will drive the moving disk 14 to move together. At this time, the second telescopic spring 15 is compressed.

[0040] Strip rods 23 are fixedly installed on both the upper and lower surfaces of the mounting plate 4. Each of the two strip rods 23 has a cavity inside. A sealing airbag 24 is fixedly installed on the strip rod 23. Multiple inflation holes are opened on the inner wall of the cavity, all of which are connected to the sealing airbag 24. The surface of the sealing airbag 24 is in contact with the surface of the keel frame 2 and the surface of the mounting plate 4.

[0041] Both the cavity of the strip rod 23 and the sealing airbag 24 are filled with gas, and the sealing airbag 24 is in an inflated state. When the mounting plate 4 and the clip 5 are installed in the slot 3, the surface of the sealing airbag 24 is in contact with the surface of the keel frame 2 and the surface of the mounting plate 4. Thus, the sealing airbag 24 will block the gap between the keel frame 2 and the mounting plate 4, preventing rainwater from seeping in and avoiding the risk of water leakage.

[0042] The mounting plate 4 has multiple air chambers 25 inside. Each air chamber 25 has two air inlets on its inner wall that are connected to the cavities of two strip rods 23. A push plate 26 is horizontally and slidably installed inside the air chamber 25. The two air inlets are located on the side of the push plate 26 near the strip hole 6. The mounting plate 4 is provided with a transmission assembly for moving the push plate 26. The side wall of the strip hole 6 has a sliding hole that is connected to the air chamber 25. The transmission assembly includes a slide rod 27 that is slidably installed in the sliding hole and a transmission ring 28 that is fixedly installed at one end of the slide rod 27. The end of the slide rod 27 away from the transmission ring 28 is fixedly connected to the push plate 26. The transmission ring 28 is sleeved on the fastening screw 8.

[0043] The side of the push plate 26 is in sealed contact with the inner wall of the air chamber 25. When the push plate 26 moves toward the air inlet, the air on the side of the push plate 26 near the air inlet will pass through the air inlet and enter the cavity opened by the strip rod 23, and enter the sealing airbag 24 through the inflation hole, causing the sealing airbag 24 to expand. When the push plate 26 moves away from the air inlet, the gas in the cavity and the sealing airbag 24 will be drawn into the air chamber 25, thereby shrinking the sealing airbag 24.

[0044] The end of the push plate 26 away from the strip hole 6 is a closed space between it and the air chamber 25. A conical block 29 is fixedly installed at the lower end of the fastening screw 8. When the fastening screw 8 passes through the strip hole 6, the conical block 29 can facilitate the transmission ring 28 to be fitted onto the fastening screw 8.

[0045] Construction method: When installing the roof panel, first insert the mounting plate 4 and the clip 5 installed on the roof panel into the slot 3. During the insertion process, the rectangular hole on the clip 5 is aligned with the rectangular rod 13, so that the rectangular rod 13 is inserted into the rectangular hole. During the insertion process, the two sides of the rectangular hole on the clip 5 will contact the inclined surfaces of the two trapezoidal limiting blocks 22. Under the action of the inclined surfaces, the trapezoidal limiting blocks 22 are squeezed and moved into the rectangular groove 20. The fourth telescopic spring 21 is compressed. When the trapezoidal limiting block 22 passes through the rectangular hole, under the action of the elastic force of the fourth telescopic spring 21, the trapezoidal limiting block 22 will move out of the rectangular groove 20 and contact the inner wall of the strip hole 6. At the same time, the side of the clip 5 will contact the moving plate 14. At this time, the strip hole 6 is just aligned with the positioning hole 7. Then, the fastening screw 8 is passed through the positioning hole 7 and the strip hole 6 in sequence. Finally, the fastening nut 9 is threaded onto one end of the fastening screw 8 to complete the installation of the roof panel.

[0046] When the roof panel expands and contracts due to temperature, the roof panel will move the locking block 5 within the slot 3 via the mounting plate 4. During the movement, the ball bearing 12 can reduce the friction between the locking block 5 and the slot 3, thereby facilitating the horizontal movement of the locking block 5 within the slot 3 and preventing friction from affecting the expansion and contraction deformation of the roof panel. At the same time, relative to the locking block 5, the fastening screw 8 undergoes relative displacement within the slot 6, ensuring that the locking block 5 has a certain displacement space during the expansion and contraction deformation of the roof panel, effectively preventing the roof panel from cracking and improving the service life of the roof panel.

[0047] When the roof panel expands and contracts, it will cause the locking block 5 to move. When the locking block 5 moves away from the slot 3, the locking block 5 will drive the moving block 16 to slide on the slide rail 17 through the two trapezoidal limit blocks 22. The third telescopic spring 18 is compressed, so that when the temperature affects the roof panel, the locking block 5 can move back under the action of the elastic force of the third telescopic spring 18.

[0048] When the locking block 5 moves into the slot 3, it will cause the moving disk 14 to slide on the rectangular rod 13, and the second telescopic spring 15 will be compressed. When the temperature effect on the roof panel decreases, the locking block 5 can move back under the action of the elastic force of the second telescopic spring 18, ensuring that the locking block 5 returns to the initial position. Thus, when the temperature affects the roof panel again, the roof panel can be deformed repeatedly, further improving the service life of the roof panel.

[0049] When the mounting plate 4 and the clip 5 are installed on the keel frame 2, the sealing airbag 24 installed on the mounting plate 4 will come into contact with the keel frame 2 and the mounting plate 4, thereby blocking the gap between the keel frame 2 and the mounting plate 4, preventing rainwater from seeping in and avoiding the risk of water leakage.

[0050] Meanwhile, when the fastening screw 8 passes through the strip hole 6, the transmission ring 28 will be fitted onto the fastening screw 8. When the locking block 5 moves away from the locking slot 3 in the slot 3, the distance between the strip rod 23 and the keel frame 2 increases. At this time, the sealing airbag 24 cannot effectively block the gap between the keel frame 2 and the mounting plate 4. At the same time, due to the relative displacement between the locking block 5 and the fastening screw 8, the transmission ring 28 will drive the sliding rod 27 to move in the sliding hole, and drive the push plate 26 in the air chamber 25 to move towards the air inlet, filling the air chamber 25 with gas into the cavity and the sealing airbag 24, causing the sealing airbag 24 to expand. Thus, the distance between the strip rod 23 and the keel frame 2 increases, and the sealing airbag 24 can still contact the gap between the mounting plate 4 and the keel frame 2, ensuring the sealing performance of the sealing airbag 24.

[0051] When the locking block 5 moves into the slot 3, the distance between the strip rod 23 and the keel frame 2 decreases. At this time, the sealing airbag 24 exerts a large force on the gap between the keel frame 2 and the mounting plate 4, which will affect the movement of the locking block 5. At the same time, the transmission ring 28 will drive the push plate 26 to move away from the air inlet through the slide rod 27. At this time, the sealing airbag 24 and the air in the cavity will be sucked into the air chamber 25, and the sealing airbag 24 will become smaller, thereby reducing the force of the sealing airbag 24 on the gap between the keel frame 2 and the mounting plate 4. This allows the sealing airbag 24 to just block the gap between the keel frame 2 and the mounting plate 4, preventing the sealing airbag 24 from being too large and affecting the movement of the locking block 5, or too small and affecting the sealing performance.

[0052] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A BIM-based double-arc metal roof panel installation structure, comprising a roof panel body (1) and two keel frames (2), characterized in that, Both sides of the two keel frames (2) are provided with slots (3), and both ends of the roof panel body (1) are fixedly installed with mounting plates (4). Multiple clips (5) are fixedly installed on the mounting plates (4). Each of the multiple clips (5) is provided with a strip hole (6). The multiple clips (5) are inserted into the slots (3). Multiple positioning holes (7) are provided on the surface of the keel frame (2). The positioning holes (7) are aligned with the strip holes (6). A fastening screw (8) is provided in the positioning hole (7). One end of the fastening screw (8) passes through the strip hole (6) and is threaded with a fastening nut (9). The slot (3) has multiple mounting slots on both the upper and lower sides. The multiple mounting slots are located near the multiple positioning holes (7). A first telescopic spring (10) is fixedly installed in the mounting slot. A cylindrical block (11) is fixedly installed at the end of the first telescopic spring (10) away from the mounting slot. A spherical groove is opened at one end of the cylindrical block (11). A ball bearing (12) is rolled and embedded in the spherical groove. The multiple balls bearing (12) roll and contact the upper and lower surfaces of the multiple slot blocks (5). The side of the card block (5) is provided with a rectangular hole that communicates with the strip hole (6). Multiple rectangular rods (13) are horizontally fixedly installed in the card slot (3). One end of each of the multiple rectangular rods (13) is slidably inserted into the rectangular holes opened on the multiple card blocks (5). A movable disk (14) is sleeved on the rectangular rod (13). A second telescopic spring (15) is sleeved on the rectangular rod (13). The two ends of the second telescopic spring (15) are fixedly connected to the surface of the movable disk (14) and the inner wall of the card slot (3) respectively. A movable hole (19) is opened on the rectangular rod (13). A movable block (16) is horizontally slidably installed in the movable hole (19) through a sliding component. Both the upper and lower ends of the movable block (16) are provided with limiting components for limiting the card block (5).

2. The double-arc metal roof panel installation structure based on BIM technology according to claim 1, characterized in that, The sliding assembly includes a slide rail (17) horizontally fixedly installed in the moving hole (19) and a third telescopic spring (18) sleeved on the slide rail (17). The moving block (16) is slidably sleeved on the slide rail (17). The two ends of the third telescopic spring (18) are fixedly connected to the inner wall of the moving hole (19) and the surface of the moving block (16), respectively.

3. The double-arc metal roof panel installation structure based on BIM technology according to claim 2, characterized in that, The moving block (16) has rectangular slots (20) at both the top and bottom. The limiting component includes a fourth telescopic spring (21) fixedly installed in the rectangular slot (20) and a trapezoidal limiting block (22) fixedly installed at one end of the fourth telescopic spring (21). The trapezoidal limiting block (22) is slidably installed in the rectangular slot (20), and the side of the trapezoidal limiting block (22) contacts the inner wall of the strip hole (6).

4. The double-arc metal roof panel installation structure based on BIM technology according to claim 3, characterized in that, The elastic coefficient of the second telescopic spring (15) is the same as that of the third telescopic spring (18), and the inclined surface of the trapezoidal limiting block (22) faces away from the moving disk (14).

5. The double-arc metal roof panel installation structure based on BIM technology according to claim 4, characterized in that, The mounting plate (4) has strip rods (23) fixedly installed on both the upper and lower surfaces. Both strip rods (23) have cavities inside. Sealing airbags (24) are fixedly installed on the strip rods (23). Multiple inflation holes connected to the sealing airbags (24) are opened on the inner wall of the cavity. The surface of the sealing airbags (24) is in contact with the surface of the keel frame (2) and the surface of the mounting plate (4).

6. The double-arc metal roof panel installation structure based on BIM technology according to claim 5, characterized in that, The mounting plate (4) has multiple air chambers (25) inside. Each of the multiple air chambers (25) has two air inlets on its inner wall that are connected to the cavities of the two strip rods (23). A push plate (26) is horizontally and slidably installed inside the air chamber (25). Both air inlets are located on the side of the push plate (26) near the strip hole (6). The mounting plate (4) is provided with a transmission assembly for driving the push plate (26) to move.

7. The double-arc metal roof panel installation structure based on BIM technology according to claim 6, characterized in that, The side wall of the strip hole (6) is provided with a sliding hole that communicates with the air chamber (25). The transmission assembly includes a slide rod (27) that is slidably installed in the sliding hole and a transmission ring (28) that is fixedly installed at one end of the slide rod (27). The end of the slide rod (27) away from the transmission ring (28) is fixedly connected to the push plate (26).

8. The double-arc metal roof panel installation structure based on BIM technology according to claim 7, characterized in that, The push plate (26) is in a closed space between the end away from the strip hole (6) and the air cavity (25), and a conical block (29) is fixedly installed at the lower end of the fastening screw (8).

9. The construction method for a double-arc metal roof panel installation structure based on BIM technology according to claim 8, characterized in that, The steps are as follows: When the roof panel needs to be installed, the mounting plate (4) and the clip (5) installed on the roof panel body (1) are inserted into the slot (3). During the insertion of the clip (5), the rectangular hole on the clip (5) is inserted into the rectangular rod (13). The two sides of the rectangular hole on the clip (5) will contact the inclined surfaces of the two trapezoidal limit blocks (22). Under the action of the inclined surfaces, the trapezoidal limit blocks (22) are squeezed to move into the rectangular slot (20), and the fourth telescopic spring (21) is compressed. When the trapezoidal limiting block (22) passes through the rectangular hole, under the elastic force of the fourth telescopic spring (21), the trapezoidal limiting block (22) will move out of the rectangular groove (20) and contact the inner wall of the strip hole (6). At the same time, the side of the locking block (5) will contact the moving disk (14). At this time, the strip hole (6) is just aligned with the positioning hole (7). Then, the fastening screw (8) is passed through the positioning hole (7), the strip hole (6), and the transmission ring (28) in sequence. Finally, the fastening nut (9) is threaded onto one end of the fastening screw (8). At this time, the sealing airbag (24) seals the gap between the mounting plate (4) and the keel frame (2), thus completing the installation of the roof panel. When the roof panel body (1) is affected by temperature and undergoes expansion and contraction deformation, the roof panel body (1) will drive the locking block (5) to move in the slot (3) through the mounting plate (4). During the movement, the ball (12) reduces the friction between the locking block (5) and the slot (3). When the roof panel body (1) is affected by temperature, the locking block (5) moves away from the slot (3). The locking block (5) will drive the moving block (16) to slide on the slide rail (17) through the two trapezoidal limit blocks (22). The third telescopic spring (18) is compressed. When the temperature affects the roof panel, the locking block (5) moves back under the action of the elastic force of the third telescopic spring (18). During this period, the distance between the strip rod (23) and the keel frame (2) becomes farther, and the sealing airbag ( 24) The gap between the keel frame (2) and the mounting plate (4) cannot be effectively blocked. Due to the relative displacement between the locking block (5) and the fastening screw (8), the sliding rod (27) is driven to move in the sliding hole through the transmission ring (28), and the push plate (26) in the air chamber (25) is driven to move towards the air inlet, so that the gas in the air chamber (25) is filled into the cavity and the sealing airbag (24), causing the sealing airbag (24) to expand and enlarge, sealing the gap between the mounting plate (4) and the keel frame (2); When the roof panel body (1) is affected by temperature, the locking block (5) moves into the slot (3), which drives the moving disk (14) to slide on the rectangular rod (13). The second telescopic spring (15) is compressed. When the temperature effect on the roof panel decreases, the locking block (5) moves back under the action of the elastic force of the second telescopic spring (15), ensuring that the locking block (5) returns to its initial position. During this period, the distance between the strip rod (23) and the keel frame (2) becomes smaller, and the sealing airbag (24) exerts a larger force on the gap between the keel frame (2) and the mounting plate (4), thus This will affect the movement of the locking block (5). At the same time, the transmission ring (28) will drive the push plate (26) to move away from the air inlet through the slide rod (27). The air in the sealing airbag (24) and the air in the cavity will be drawn into the air chamber (25). The sealing airbag (24) will become smaller, thereby reducing the force of the sealing airbag (24) on the gap between the keel frame (2) and the mounting plate (4). This will allow the sealing airbag (24) to just block the gap between the keel frame (2) and the mounting plate (4), preventing the sealing airbag (24) from being too large and affecting the movement of the locking block (5), or too small and affecting the sealing performance.

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