A double-layer ACC exterior wall panel and its installation method

Abstract

This invention relates to a double-layer ACC exterior wall panel and its installation method, comprising a first panel and a second panel. The first panel has a three-sided convex frame. The first panel is fixed to an embedded part in the wall by a first connector. Then, the second panel is fixed to the first panel by a second connector, achieving initial fixation of the ACC exterior wall panel. The first and second panels are fixed together by a second connector, which uses screws and adhesive for fixation. After initial fixation, the second panel is further connected to the embedded part by a third connector passing through the second and first panels. This arrangement further stabilizes the connection between the second and first panels and the wall, thereby transferring the pressure of the second panel on the first panel to the wall. Moreover, the cavity formed by the first and second panels can be filled with insulation substrate, giving the double-layer ACC exterior wall panel an insulation layer.

Description

Technical Field

[0001] This invention belongs to the technical field of energy-saving building structural panels, specifically relating to a double-layer ACC exterior wall panel and its installation method. Background Technology

[0002] With the development of the construction industrialization, more and more companies are starting to research and produce prefabricated wall panels. The wall panels are broken down into multiple modules and processed into semi-finished products in the factory, such as ACC exterior wall panels. On-site assembly is all that is needed to create a finished building. As labor costs rise, industrially produced wall panels are not only of high quality and fast to install, but also cheaper than traditional on-site construction. The existing exterior wall panel installation process is complicated, especially the installation of the exterior wall surface, which requires the setting of temporary supports. The exterior wall panels can only be removed after they are installed and stabilized. Moreover, the existing multi-layer exterior wall panels are produced by composite lamination, with thin intermediate functional layers and poor functional efficiency. In order to solve the above problems, this solution was developed. Summary of the Invention

[0003] In view of the shortcomings of the prior art, the technical problem to be solved by the present invention is to provide a double-layer ACC exterior wall panel and an installation method, which can produce an exterior wall panel with heat insulation and quick installation.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a double-layer ACC exterior wall panel, comprising a first panel and a second panel, the first panel and the second panel having the same shape, the outer three sides of the first panel having a continuously outwardly extending convex frame, the convex frame comprising two vertical parts and a horizontal part, the horizontal part being located at the bottom of the vertical part, and the two vertical parts being located on both sides of the horizontal part;

[0005] The vertical and horizontal portions are provided with first connecting holes corresponding to the connection points of the embedded parts. The vertical and horizontal portions are provided with second connecting holes. The second plate is provided with a third connecting hole corresponding to the second connecting holes. The first and second plates are formed with corresponding first through holes and fourth connecting holes. The convex frame is fixed to the embedded part by passing through the first connecting hole with a first connector. The second plate is connected to the first plate by passing through the third connecting hole with a second connector. The second plate is connected to the embedded part by passing through the fourth connecting hole and the first through hole with a third connector. The cavity formed by the first and second plates after they are fitted together is used to fill the insulation layer substrate.

[0006] Furthermore, both the first connector and the third connector are expansion screws.

[0007] Furthermore, the second connector is a screw, and when the second connector is connected to the second connecting hole, the second connecting hole is filled with expanding foam.

[0008] Furthermore, the double-layer ACC exterior wall panel also includes a pre-embedded positioning component. An extension column is provided on the back of the first panel. The end face of the extension column is a first inclined surface that gradually slopes upward from left to right. The surface of the pre-embedded positioning component has an extension hole. A pin hole is provided above the extension hole. The pin hole and the extension hole are connected. An insertion block is provided in the pin hole. The insertion block is slidably connected in the pin hole. The side of the pin hole facing the opening of the extension hole is a second inclined surface. The second inclined surface is adapted to the first inclined surface. A limiting groove is provided at the upper end of the circumferential surface of the extension column. The limiting groove is adapted to the lower end of the insertion block.

[0009] Furthermore, a frame hole is formed in the middle of the first plate and the second plate, and a closed-loop frame is formed around the frame hole of the first plate, the height of which is the same as the height of the convex frame.

[0010] A method for installing double-layer ACC exterior wall panels includes the following steps:

[0011] S1. Embed pre-embedded parts in the wall and level the surface of multiple pre-embedded parts;

[0012] S2. Clean and grind down any wall protrusions that are higher than the surface of the embedded parts;

[0013] S3. Lift the first plate, align the first connecting hole with the embedded part, drive in the first connecting part, and connect the first connecting part with the embedded part to fix the first plate.

[0014] S4. Insert expanding foam into the second connecting hole, lift the second board, align its third connecting hole with the second connecting hole, insert the second connector, and wait for the expanding foam to cure to fix the second board.

[0015] S5. The third connector passes through the fourth connecting hole and the first through hole and is screwed into the wall embedded part to achieve secondary fixation of the second plate.

[0016] S6. Check if there is a large gap after the first plate and the second plate are connected. If there is a large gap, seal it with sealing material.

[0017] S7. Use the plate to seal the upper opening of the chamber formed by the first plate and the second plate, open the inlet on the plate, and fill the inlet with polyurethane.

[0018] S8. After the polyurethane has cured, the panel is removed to form a double-layer ACC exterior wall panel with an insulation layer.

[0019] A double-layer ACC exterior wall panel and its installation method, comprising the following steps:

[0020] S1. Embed pre-embedded parts and pre-embedded positioning parts in the wall and level the surface of multiple pre-embedded parts and pre-embedded positioning parts;

[0021] S2. Clean and grind any wall protrusions that are higher than the surface of the embedded parts and the embedded positioning parts;

[0022] S3. Lift the first plate and align the insertion post on the back of the first plate with the insertion hole. Insert the insertion block into the pin hole as it receives the insertion post and moves upward. Continue until the insertion block aligns with the limiting groove. Then, insert the insertion block into the limiting groove to achieve initial positioning.

[0023] S5. Drive the first connector into the first connecting hole. The first connector is connected to the embedded part to fix the first plate.

[0024] S6. Insert expanding foam into the second connecting hole, lift the second board, align its third connecting hole with the second connecting hole, insert the second connector, and wait for the expanding foam to cure to fix the second board.

[0025] S7. The third connector passes through the fourth connecting hole and the first through hole and is screwed into the wall embedded part to achieve secondary fixation of the second plate.

[0026] S8. Check if there is a large gap after the first plate and the second plate are connected. If there is a large gap, seal it with sealing material.

[0027] S9. Use a plate to seal the upper opening of the chamber formed by the first plate and the second plate, open an inlet on the plate, and fill the inlet with polyurethane.

[0028] S10. After the polyurethane has cured, the panel is removed to form a double-layer ACC exterior wall panel with an insulation layer.

[0029] Furthermore, the embedding depth of the embedded part is at least thirty times the diameter of the first connector.

[0030] Furthermore, when filling with polyurethane, spray the inside of the cylinder for 5-30 seconds beforehand and observe whether the polyurethane foaming is abnormal. After confirming that there is no abnormality, pour in 40% of the volume of the first and second plates to form the cavity, wait for one day for foaming, observe the foaming, and if there is no abnormality in the foaming, pour in 40% of the volume of the first and second plates to form the cavity.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] 1. In this invention, the double-layer ACC exterior wall is divided into two parts, including a first panel and a second panel. The first panel is provided with a three-sided protruding frame. The first panel is fixed to a pre-embedded part embedded in the wall through a first connector. Then, the second panel is fixed to the first panel through a second connector, thus achieving the initial fixation of the ACC exterior wall panel. Existing exterior wall panels have excessive weight, requiring suitable hangers with large traction force. Furthermore, the large weight of the exterior wall panel results in significant stress concentration, which can pose significant safety hazards during installation. Therefore, fixing the panels separately avoids these problems. The first panel and the second panel are connected by a second connector. The connectors are fixed in place. The second connector is fixed using a combination of screws and adhesive, as screws alone are not strong enough and using expansion screws would cause the panel to crack. After initial fixing, the second panel is connected to the embedded part through a third connector that passes through the second and first panels. This arrangement further stabilizes the connection between the second and first panels and the wall, transferring the pressure of the second panel on the first panel to the wall. The cavity formed by the first and second panels can also be filled with insulation material, giving the double-layer ACC exterior wall panel an insulation layer.

[0033] 2. This solution provides two installation methods for ACC exterior walls. When injecting polyurethane, it is divided into two injections. The first injection is to check the foaming quality and see if there is any foaming. The second injection is to fill the cavity between the first and second panels with polyurethane. The total volume of the two injections is 80% of the cavity between the first and second panels. This can release the tension generated during the polyurethane foaming process while ensuring the formation of the insulation layer. Attached Figure Description

[0034] Figure 1 This is a three-dimensional structural diagram of the double-layer ACC exterior wall panel in Embodiment 1 of the present invention;

[0035] Figure 2 This is a front view structural diagram of the first plate in Embodiment 1 of the present invention;

[0036] Figure 3 This is a cross-sectional structural diagram of the connection position of the first connector and the second connector in Embodiment 1 of the present invention;

[0037] Figure 4 This is a schematic cross-sectional view of the middle section of the double-layer ACC exterior wall panel in Embodiment 1 of the present invention;

[0038] Figure 5 This is a schematic cross-sectional view of the connection between the first and third connectors in Embodiment 1 of the present invention, after the cavity is filled with polyurethane.

[0039] Figure 6 This is a schematic cross-sectional view of the connection between the extended column and the pre-embedded positioning component in Embodiment 2 of the present invention;

[0040] Figure 7 This is a three-dimensional structural diagram of the double-layer ACC exterior wall panel in Embodiment 3 of the present invention;

[0041] Figure 8 This is a front view structural diagram of the first plate in Embodiment 3 of the present invention;

[0042] Figure 9 This is a cross-sectional structural diagram of the connection position of the first connector and the second connector in Embodiment 3 of the present invention;

[0043] Figure 10 This is a schematic cross-sectional view of the middle section of the double-layer ACC exterior wall panel in Embodiment 3 of the present invention;

[0044] Figure 11 This is a schematic cross-sectional view of the connection between the first and third connectors in Embodiment 3 of the present invention, after the cavity is filled with polyurethane.

[0045] The markings in the diagram are as follows: 1. First plate; 11. First connecting hole; 12. Second connecting hole; 13. First through hole; 14. Insertion post; 15. Protruding frame; 16. Enclosure frame; 2. Second plate; 21. Third connecting hole; 22. Fourth connecting hole; 3. Chamber; 4. First connector; 5. Second connector; 6. Third connector; 7. Embedded part; 8. Embedded positioning part; 81. Insertion hole; 82. Pin hole; 83. Insertion block; 9. Polyurethane. Detailed Implementation

[0046] To make the above features and advantages of the present invention more apparent and understandable, specific embodiments are described below in conjunction with the accompanying drawings for detailed explanation.

[0047] Example 1

[0048] like Figures 1-5 As shown, this embodiment provides a double-layer ACC exterior wall panel, including embedded parts 7, a first panel 1, and a second panel 2.

[0049] The first plate 1 and the second plate 2 have the same shape in their vertical projections. The outer three sides of the first plate 1 have continuously outwardly extending convex frames 15, each including two vertical parts and a horizontal part. The horizontal part is located at the bottom of the vertical part, and the two vertical parts are located on both sides of the horizontal part. First connecting holes 11 corresponding to the connection points of the embedded parts 7 are provided on the vertical and horizontal parts. In this embodiment, there are three first connecting holes 11 on the vertical and horizontal parts, spaced apart. Second connecting holes 12 are provided on the vertical and horizontal parts. In this embodiment, there are two second connecting holes 12 on the vertical and horizontal parts, located between adjacent first connecting holes 11. The first plate 1 also has two first through holes 13 located between the convex frames 15. The second plate 2 has a third connecting hole 21 corresponding to the second connecting hole 12, and a fourth connecting hole 22 corresponding to the first through hole 13. The first connecting holes 11, 21, and 22 are countersunk holes.

[0050] The convex frame 15 is fixed to the embedded part 7 through the first connecting piece 4 passing through the first connecting hole 11. The first connecting piece 4 is an expansion screw. The second plate 2 is connected to the embedded part 7 through the third connecting piece 6 passing through the fourth connecting hole 22 and the first through hole 13. The third connecting piece 6 is an expansion screw. The second plate 2 is connected to the first plate 1 through the second connecting piece 5 passing through the third connecting hole 21 and extending into the second connecting hole 12. The second connecting piece 5 is a screw. When the second connecting piece 5 is connected to the second connecting hole 12, the second connecting hole 12 is filled with expanding foam. After the first plate 15 and the second plate 2 are connected, a cavity 3 is formed. The cavity 3 is used to fill the insulation layer substrate. The insulation layer substrate is polyurethane 9.

[0051] The embedded part 7 is provided with fixing holes, which are used to adapt to the first connector 4 and the third connector 6. The embedded part 7 is used to be embedded in the wall surface, and the embedding depth of the embedded part 7 is at least thirty times the diameter of the first connector 4.

[0052] This embodiment also provides a method for installing double-layer ACC exterior wall panels, including the following steps:

[0053] S1. Embed the pre-embedded parts 7 in the wall and level the surface of multiple pre-embedded parts 7; the specific steps are as follows: First, apply a mortar leveling layer according to the elevation to make it reach a certain strength. Before the exterior wall panel is in place, pour neat cement slurry to make the bonding surface tight and the elevation accurate. Then, open the installation groove at the designated position and embed the pre-embedded parts 7.

[0054] S2. Clean and grind the wall protrusions that are higher than the surface of the embedded part 7; the specific steps are as follows: use a scraper or grinder to remove or grind the protrusions on the leveled wall surface.

[0055] S3. Lift the first plate 1, align the first connecting hole 11 with the embedded part 7, drive in the first connecting part 4, and connect the first connecting part 4 with the embedded part 7 to fix the first plate 1. The specific steps are as follows: Fix the first plate 1 with the lifting ring, then lift the first plate 1 with the hoist and move the first plate 1 to the designated position so that the first connecting hole 11 corresponds with the fixing hole on the embedded part 7. Drive in the expansion screws to fix the first plate 1 to the wall and remove the lifting ring.

[0056] S4. Inject expanding foam into the second connecting hole 12, lift the second plate 2, align its third connecting hole 21 with the second connecting hole 12, insert the second connector 5, and wait for the expanding foam to cure to fix the second plate 2. The specific steps are as follows: Inject expanding foam into the second connecting hole 12 through the caulking chamber, lift the second plate 2, align its third connecting hole 21 with the second connecting hole 12, screw in the second connector 5, and let it stand for 8-12 hours to allow the expanding foam to cure.

[0057] S5. The third connector 6 passes through the fourth connecting hole 22 and the first through hole 13 and is screwed into the wall embedded part 7 to achieve secondary fixation of the second plate 2. The specific steps are as follows: while waiting for the foam to cure, a specially made expansion screw passes through the fourth connecting hole 22 and the first through hole 13 and is driven into the fixing hole of the embedded part 7. The expansion screw in this step includes a countersunk head, a connecting part and a threaded part. The countersunk head, the connecting part and the threaded part are arranged from left to right. The connecting part is located in the cavity 3 formed by the first plate 1 and the second plate 2.

[0058] S6. Check if there is a large gap after the first plate 1 and the second plate 2 are connected. If there is a large gap, seal it with sealing material. The specific steps are as follows: Observe and check if there is a large gap after the first plate 1 and the second plate 2 are connected. If there is, seal it with sealing material. The sealing material should preferably be a single-component polyurethane 9 applied to the gap. After the sealing material has cured, proceed to the next step.

[0059] S7. The upper opening of the chamber 3 is formed by sealing the first plate 1 and the second plate 2 with a plate body. An inlet is made on the plate body, and polyurethane 9 is filled into the inlet. The specific steps are as follows: Two tie holes are made on the plate body. Two bolts are set on the side of the plate body facing the chamber 3. The heads of the two bolts are located inside the chamber 3. A tie plate is locked at the position of the two bolt heads. The tie plate has two arc-shaped recesses. The two arc-shaped recesses are adapted to the bottom of the circumference of the two third connecting parts 6. The tie plate is located below the two third connecting parts 6 and the arc-shaped recesses are in contact with the third connecting parts 6. After the bolts pass through the two tie holes, nuts are screwed on and tightened by the nuts. The plates are made to fit tightly against the upper opening of the cavity 3, and then filled. When filling with polyurethane 9, a 5-30 second spray is applied to the inside of the cylinder beforehand to observe whether the foaming of polyurethane 9 is abnormal. After confirming that there is no abnormality, the first plate 1 and the second plate 2 are poured to form 40% of the volume of the cavity 3. The foaming is observed for one day. If there is no abnormality in the foaming, the first plate 1 and the second plate 2 are poured to form 40% of the volume of the cavity 3. The total volume of the two pours is 80% of the inner cavity of the first plate 1 and the second plate 2. This can release the tension generated during the foaming process of polyurethane 9 while ensuring the formation of the insulation layer.

[0060] After S8 and polyurethane 9 have cured, the panel is removed to form a double-layer ACC exterior wall panel with an insulation layer. The specific steps are as follows: After 24 hours of static foaming, loosen the nuts and remove the panel. Insert the bolts and pull plates directly into the cavity 3.

[0061] S9. After installation, the surface of the second plate 2 needs to be cleaned and the holes filled (such as the openings of the third connecting hole 21 and the fourth connecting hole 22).

[0062] Example 2

[0063] like Figure 6As shown, the difference between this embodiment and embodiment 1 is that a double-layer ACC exterior wall panel also includes a pre-embedded positioning component 8, and the pre-embedded depth of the pre-embedded component 7 is at least thirty times the diameter of the first connecting component 4. The back of the first plate 1 is provided with an extension post 14, which is a prism. In this embodiment, a quadrangular prism is used. The end face of the extension post 14 is a first inclined surface that gradually slopes upward from left to right. The angle between the first inclined surface and the bottom surface of the extension post 14 is 25°-35°. The surface of the pre-embedded positioning part 8 has an extension hole 81. A pin hole 82 is provided above the extension hole 81. The pin hole 82 and the extension hole 81 are connected. An insertion block 83 is provided in the pin hole 82. The insertion block 83 is slidably connected in the pin hole 82. The side of the pin hole 82 facing the opening of the extension hole 81 is a second inclined surface. The second inclined surface is adapted to the first inclined surface. A limiting groove is provided at the upper end of the periphery of the extension post 14. The limiting groove is adapted to the lower end of the insertion block 83. Preferably, the angle between the first inclined surface and the bottom surface of the extension post 14 is 25°-35°. After the extension post 14 is inserted at this angle, it is easier to lift the insertion block 83. The function of the insertion post 14 and the insertion hole 81 is to perform preliminary positioning, and after the first connector 4 is connected, to achieve double fixation of the first plate 1.

[0064] This embodiment also provides a method for installing double-layer ACC exterior wall panels, including the following steps:

[0065] S1. Embed the pre-embedded parts 7 and pre-embedded positioning parts 8 in the wall and level the surfaces of the multiple pre-embedded parts 7 and pre-embedded positioning parts 8; the specific steps are the same as step S1 in embodiment 1.

[0066] S2. Clean and grind the wall protrusions that are higher than the surfaces of the embedded parts 7 and 8; the specific steps are the same as step S2 in Example 1.

[0067] S3. Lift the first plate 1, align the insertion post 14 on the back of the first plate 1 with the insertion hole 81 and insert it. The insertion block 83, receiving the insertion post 14, moves upward and extends into the pin hole 82 until the insertion block 83 corresponds to the limiting groove. The insertion block 83 is then inserted into the limiting groove to achieve initial positioning. The specific steps are as follows: Fix the first plate 1 with the lifting ring, then lift the first plate 1 with a crane and move it to the designated position so that the first connecting hole 1... The extension column 14 corresponds to the extension hole 81 on the pre-embedded part 7. The extension column 14 is inserted into the extension hole 81. The first inclined surface of the extension column 14 is adapted to the second inclined surface of the insertion block 83. As the extension column 14 extends, it will drive the insertion block 83 to move upward until the insertion block 83 extends into the pin hole 82. Until the insertion block 83 corresponds to the limiting groove, the insertion block 83 is stuck in the limiting groove. At this time, the extension column 14 is laterally limited. Remove the lifting ring.

[0068] S5. Drive the first connector 4 into the first connecting hole 11. The first connector 4 is connected to the embedded part 7 to fix the first plate 1. The specific steps are as follows: Drive the expansion screw into the first connecting hole 11 to fix the first plate 1 to the wall.

[0069] S6. Insert expanding foam into the second connecting hole 12, lift the second plate 2, align its third connecting hole 21 with the second connecting hole 12, insert the second connector 5, and wait for the expanding foam to cure to fix the second plate 2; the specific steps are the same as step S4 in embodiment 1.

[0070] S7. The third connector 6 passes through the fourth connecting hole 22 and the first through hole 13 and is screwed into the wall embedded part 7 to achieve secondary fixation of the second plate 2; the specific steps are the same as step S5 in embodiment 1.

[0071] S8. Check whether there is a large gap after the first plate 1 and the second plate 2 are connected. If there is a large gap, seal it with sealing material. The specific steps are the same as step S6 in Example 1.

[0072] S9. The upper opening of the chamber 3 formed by the first plate 1 and the second plate 2 is closed with the plate body, and an inlet is opened on the plate body to fill the inlet with polyurethane 9; the specific steps are the same as step S7 in Example 1.

[0073] S10. After polyurethane 9 has cured, the panel is removed to form a double-layer ACC exterior wall panel with an insulation layer; the specific steps are the same as step S8 in Example 1.

[0074] S11. After installation, the surface of the second plate 2 needs to be cleaned and the holes filled (such as the openings of the third connecting hole 21 and the fourth connecting hole 22).

[0075] Example 3

[0076] like Figures 7-11 As shown, the difference between this embodiment and embodiment 1 is that a frame hole is formed in the middle of the first plate 1 and the second plate 2, and a closed-loop frame 16 is formed on the outer periphery of the frame hole of the first plate 1. The height of the frame 16 is the same as the height of the protruding frame 15. The ACC exterior wall panel in this embodiment is used to adapt to an exterior wall with a window.

[0077] The installation method in this embodiment is the same as that in Embodiment 1, and will not be described again here.

[0078] In this solution, the double-layer ACC exterior wall is divided into two parts: a first panel 1 and a second panel 2. The first panel 1 has a three-sided protruding frame 15. The first panel 1 is fixed to a pre-embedded part 7 embedded in the wall via a first connector 4. Then, the second panel 2 is fixed to the first panel 1 via a second connector 5, achieving initial fixing of the ACC exterior wall panel. Existing exterior wall panels, due to their excessive weight, require suitable hangers with significant traction force, and the large weight of the panels leads to stress concentration, posing a significant safety hazard during installation. Therefore, fixing them separately avoids these problems. The first panel 1 and the second panel 2 are connected by a second connector... The second connecting piece 5 is fixed by using screws and glue, because the connection strength is not enough when using screws alone, and the connection of using expansion screws will cause the panel to crack. After the initial fixing, the second panel 2 is also connected to the embedded part 7 through the third connecting piece 6 passing through the second panel 2 and the first panel 1. This setting can further stabilize the connection between the second panel 2 and the first panel 1 and the wall, thereby transferring the pressure of the second panel 2 on the first panel 1 to the wall. Moreover, the cavity 3 formed by the first panel 1 and the second panel 2 can be filled with the insulation layer substrate, so that the double-layer ACC exterior wall panel has an insulation layer.

[0079] Moreover, the ACC exterior wall panels supported in this scheme have the following advantages in terms of thermal insulation performance compared with existing ACC walls: the polyurethane 9 in this scheme has good thermal insulation performance and low thermal conductivity (0.02). The liquid polyurethane 9 repairs the gaps in the construction process, and the exterior wall forms a complete closed thermal insulation layer; existing aerated blocks and rock wool exterior wall panels: rock wool has poor thermal insulation performance and high thermal conductivity (0.04). The walls are composed of small rock wool boards and aerated blocks, and there are a lot of gaps between the blocks; the insulation is connected to the wall with anchor bolts; traditional steel wire mesh structure: EPS has poor thermal insulation performance and high thermal conductivity (0.039). There are a lot of connecting parts between the inner wall and the outer wall.

[0080] The foregoing has shown and described the basic principles and main features of the present invention, as well as its advantages. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the present invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope. All such changes and modifications fall within the scope of the present invention as claimed, which is defined by the appended claims and their equivalents.

Claims

1. A dual-layer ACC exterior wall panel, characterized by: The application relates to a double-layer ACC outer wall plate, which comprises a first plate body and a second plate body, the first plate body and the second plate body are identical in shape, the first plate body is provided with a continuous outwardly-extending convex frame at three edges of the periphery of the first plate body, the convex frame comprises two vertical parts and a horizontal part, the horizontal part is located at the bottom of the vertical parts, and the two vertical parts are located at the two sides of the horizontal part; First connecting holes corresponding to the connecting positions of the embedded parts are formed on the vertical parts and the horizontal part, second connecting holes are formed on the vertical parts and the horizontal part, the second plate body is provided with third connecting holes corresponding to the second connecting holes, first through holes and fourth connecting holes are formed on the first plate body and the second plate body, the convex frame is fixed with the embedded parts through first connecting pieces penetrating through the first connecting holes, the second plate body is connected with the first plate body by penetrating into the second connecting holes through second connecting pieces penetrating through the third connecting holes, and the second plate body is connected with the embedded parts through third connecting pieces penetrating through the fourth connecting holes and the first through holes; a cavity formed by the first plate body and the second plate body is used for filling a thermal insulation layer base material; The double-layer ACC outer wall plate further comprises an embedded positioning part, the back surface of the first plate body is provided with a protruding column, the end surface of the protruding column is a first inclined surface which is gradually inclined upwards from left to right, the surface of the embedded positioning part is provided with a protruding hole, a bolt hole is formed above the protruding hole, the bolt hole is communicated with the protruding hole, an insertion block is arranged in the bolt hole and is slidably connected in the bolt hole, the opening surface of the bolt hole facing the protruding hole is a second inclined surface, the second inclined surface is matched with the first inclined surface, a limiting groove is formed on the upper end of the circumferential surface of the protruding column, and the limiting groove is matched with the lower end of the insertion block.

2. The dual-layer ACC exterior wall panel of claim 1, wherein: The first connecting piece and the third connecting piece are both expansion screws.

3. The dual-layer ACC exterior wall panel of claim 1, wherein: The second connecting piece is a screw, and foaming glue is filled in the second connecting hole when the second connecting piece is connected with the second connecting hole.

4. The dual-layer ACC exterior wall panel of claim 1, wherein: A frame mounting hole is formed in the middle of the first plate body and the second plate body, a closed loop surrounding frame is formed on the outer periphery of the frame mounting hole of the first plate body, and the height of the surrounding frame is the same as that of the convex frame.

5. A method of installing a double-skin ACC facade according to claim 1, characterized in that: The application further discloses a method for manufacturing the double-layer ACC outer wall plate, which comprises the following steps: S1, embedding embedded parts on a wall body and leveling the surfaces of the embedded parts; S2, cleaning and polishing the wall surface protruding higher than the surfaces of the embedded parts; S3, hoisting the first plate body, aligning the first connecting holes with the embedded parts, driving the first connecting pieces, connecting the first connecting pieces with the embedded parts, and fixing the first plate body; S4, driving foaming glue into the second connecting holes, hoisting the second plate body, aligning the third connecting holes with the second connecting holes, driving the second connecting pieces, waiting for the solidification of the foaming glue, and fixing the second plate body; S5, rotating the third connecting pieces into the embedded parts of the wall body through the fourth connecting holes and the first through holes, and secondarily fixing the second plate body; S6, checking whether there are large gaps between the first plate body and the second plate body after the connection, and sealing the gaps with sealing materials if there are large gaps; S7, closing the upper opening of the cavity formed by the first plate body and the second plate body with a plate, opening an inlet on the plate, and filling polyurethane into the inlet; S8, removing the plate after the solidification of the polyurethane, and forming the double-layer ACC outer wall plate with a thermal insulation layer.

6. A method of installing a double-skin ACC facade according to claim 1, characterized in that: The application further discloses a method for manufacturing the double-layer ACC outer wall plate, which comprises the following steps: S1, burying the embedded parts and embedded positioning parts on the wall body and leveling the surfaces of the embedded parts and embedded positioning parts; S2, cleaning and polishing the protrusions on the wall surface higher than the surfaces of the embedded parts and embedded positioning parts; S3, hoisting the first plate body, aligning the protruding column on the back of the first plate body with the insertion hole, inserting the insertion block into the insertion hole, moving the insertion block upward to the insertion hole, until the insertion block corresponds to the limiting groove, and then inserting the insertion block into the limiting groove to achieve preliminary positioning; S5, driving the first connecting part into the first connecting hole, connecting the first connecting part with the embedded part, and fixing the first plate body; S6, driving the foaming glue into the second connecting hole, hoisting the second plate body, aligning the third connecting hole with the second connecting hole, driving the second connecting part, waiting for the foaming glue to solidify, and fixing the second plate body; S7, rotating the third connecting part through the fourth connecting hole and the first through hole into the embedded part of the wall body to realize the secondary fixation of the second plate body; S8, checking whether there is a large gap between the first plate body and the second plate body after connection, and if there is a large gap, using sealing material to seal the gap; S9, closing the upper opening of the cavity formed by the first plate body and the second plate body with the plate body, opening the inlet on the plate body, and filling the polyurethane into the inlet; S10, after the polyurethane is solidified, the plate body is removed, and a double-layer ACC outer wall plate with a thermal insulation layer is formed.

7. A method of installing a two-layer ACC exterior wall panel according to claim 5 or 6, characterized in that: The embedded depth of the embedded part is at least thirty times the diameter of the first connecting part.

8. The method of installing a two-layer ACC exterior wall panel according to claim 5 or 6, characterized in that: When filling the polyurethane, spray 5-30 seconds in the cylinder in advance, observe whether the polyurethane foaming is abnormal; after determining that there is no abnormality, pour the first plate body and the second plate body to form a cavity with a volume of forty percent, wait for one day to foam, observe the foaming condition, and pour the first plate body and the second plate body to form a cavity with a volume of forty percent again.

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