Integrated reverse construction method for thermal insulation and fire protection of building exterior walls

Abstract

The present invention belongs to the technical field of building protective walls, specifically relating to a reverse-construction method for integrated thermal insulation and fire protection of building exterior walls, comprising the following steps: S1, laying embedded blocks; S2, installing L-shaped corner bracket support assemblies and cantilever hanging assemblies; S3, installing internal support pads and drilling holes; S4, installing and reinforcing fireproof panels; S5, pouring polyurethane foam insulation slurry; S6, dismantling and recycling; and S7, applying the exterior wall finishing layer. This method can improve the thermal insulation and fire protection performance of building exterior walls, shorten the construction process, and enhance the adaptability to the construction of complex wall shapes and super-high-rise buildings. It solves the technical problems of traditional processes, such as significant thermal bridges, cumbersome procedures, and weak anchoring.

Description

Technical Field

[0001] The present invention belongs to the technical field of building protective walls, and in particular relates to an integrated reverse construction method for thermal insulation and fire protection of building exterior walls. Background Art

[0002] The construction sector is one of the main areas of energy consumption and carbon emissions in my country. With the advancement of carbon peak and carbon neutrality goals, new urban buildings are required to fully implement energy-saving standards, and the proportion of near-zero energy and ultra-low energy buildings is increasing year by year. For public buildings, high-rise buildings over 100 meters, and special buildings, the exterior walls of near-zero energy buildings must meet both thermal insulation and fire protection requirements. However, traditional exterior wall insulation and fire protection construction methods face numerous technical bottlenecks.

[0003] Traditional exterior wall insulation and fireproofing methods primarily utilize two processes: a hanging rock wool board process, where polyurethane is sprayed first as the insulation layer, followed by dry-hanging rock wool boards over steel keels as the fireproof layer. The other is an anchored rock wool board process, where polyurethane boards are first attached as the insulation layer, then bolted in place to form the fireproof layer. In the hanging rock wool board process, the high thermal conductivity of the steel keels increases localized heat loss and forms significant thermal bridges. Furthermore, the insulation layer formed by spraying polyurethane has an uneven, matte surface that requires manual smoothing, which produces a large amount of polyurethane debris and pollutes the environment. Furthermore, gaps exist between the dry-hanged fireproof layer and the insulation layer, compromising the fireproofing and airtightness of the building's exterior walls. In the process of anchoring rock wool boards, the thickness of the insulation layer often reaches 100-200mm. It is difficult to effectively fix the fireproof layer with expansion bolts alone, especially when constructing aerated concrete walls or walls with complex shapes. This can easily lead to the fireproof layer being loosely fixed and having unstable quality. At the same time, the interlayer gap between the insulation layer and the fireproof layer is large, resulting in poor airtightness of the building's exterior wall. In the event of a fire, smoke will spread rapidly along the gap, destroying the fireproof integrity of the exterior wall.

[0004] Chinese patent CN119754442A discloses a prefabricated fireproof and thermal insulation integrated composite exterior wall panel and its construction method. The panel comprises an insulation board, an installation frame, fixings, and a fireproof board. The installation frame is sleeved around the insulation board, with the end of the installation frame contacting the wall serving as the fixing end. The distance between the insulation board's surface closest to the fixing end and the fixing end is greater than zero, thereby forming a pouring cavity. The installation frame has a pouring port on one side and an exhaust port on the opposite side, both of which are connected to the pouring cavity. The installation frame is fixed to the wall via fixings. The fireproof board is installed within the installation frame, located on the side of the insulation board away from the fixing end. The installation frame is mounted to the wall via fixings, and adhesive is then pumped from the pouring port into the pouring cavity via a grouting pump. This patent reduces the number of steps required to apply adhesive, thereby improving the fire resistance of the exterior wall panel. However, the fireproof board and insulation board are fixed via the installation frame. If the base wall has a complex shape, the prefabricated components need to be cut and adjusted on-site, which reduces installation efficiency. Summary of the Invention

[0005] The purpose of the present invention is to provide an integrated reverse construction method for thermal insulation and fire protection of building exterior walls, which can improve the thermal insulation and fire protection performance of building exterior walls, shorten the construction process, improve the construction adaptability to complex wall shapes and super high-rise buildings, and solve the technical problems of significant thermal bridges, cumbersome procedures, and weak anchoring in traditional processes.

[0006] To achieve the above object, the technical solution of the present invention is:

[0007] A method for integrated reverse construction of building exterior wall thermal insulation and fire protection, comprising the following steps:

[0008] S1. Leave embedded blocks

[0009] Building aerated concrete block walls with a number of embedded blocks;

[0010] S2. Install L-shaped corner bracket support components and hanging components

[0011] After the aerated concrete block wall is built, holes are drilled on the embedded blocks and L-shaped corner bracket support components are installed. Insulation pads are placed between the L-shaped corner bracket support components and the embedded blocks.

[0012] A plurality of hanging components are provided at one end of the L-shaped angle bracket support component away from the thermal insulation pad, and the hanging components include an upper card slot, a lower card slot and an adjustment plate;

[0013] S3. Install inner support pads and drill holes

[0014] A plurality of through-wall bolt holes are drilled in the aerated concrete block wall, and a plurality of inner support pads are provided on one side of the aerated concrete block wall close to the L-shaped angle bracket support assembly to match the through-wall bolt holes;

[0015] S4. Install fireproof board and reinforce

[0016] A fireproof board is installed on one side of the aerated concrete block wall, with one side of the fireproof board resting on the inner support pad. A plurality of screw positioning holes are provided on the fireproof board to match the through-wall bolt holes.

[0017] An anti-seepage board is laid on the bottom layer of the aerated concrete block wall. After the laying is completed, the bottom layer of the fireproof board is installed. The bottom end of the fireproof board is against the anti-seepage board, and the top end of the fireproof board is clamped in the lower slot of the hanging component.

[0018] Install the through-wall screws through the bottom layer of fireproof board, inner support pads and aerated concrete block wall in sequence;

[0019] After the bottom layer of fireproof panels is installed, several groups of standard layer fireproof panels are installed from bottom to top. The bottom end of the standard layer fireproof panels is clamped into the upper clamping slot of the hanging assembly, and the top end of the standard layer fireproof panels is clamped into the lower clamping slot of the hanging assembly.

[0020] Install the through-wall screws by sequentially passing through the fireproof board, inner support pads and aerated concrete block walls of the standard layer;

[0021] An anti-slip fixing card 1 and an anti-slip fixing card 2 are respectively provided at both ends of the through-wall screw. A reinforcing wood square 1 is provided in the anti-slip fixing card 1 in cooperation with the fireproof board, and a reinforcing wood square 2 is provided in the anti-slip fixing card 2 in cooperation with the aerated concrete block wall. The anti-slip fixing card 1 and the anti-slip fixing card 2 are adjusted so that the verticality of the fireproof board is consistent with the verticality of the aerated concrete block wall. After the adjustment is completed, the anti-slip fixing card 1 and the anti-slip fixing card 2 are tightened so that the reinforcing wood square 1 rests on the fireproof board and the reinforcing wood square 2 rests on the aerated concrete block wall.

[0022] S5, pouring polyurethane foam insulation slurry

[0023] A pouring cavity is formed between the aerated concrete block wall and the fireproof board, and polyurethane foam insulation slurry is poured layer by layer from the bottom to the top of the pouring cavity. The height of each layer of polyurethane foam insulation slurry is between 450-500mm.

[0024] After the polyurethane foam insulation slurry is cured, it is bonded to the fireproof board to form an integrated insulation and fireproof layer;

[0025] S6. Dismantling and recycling

[0026] Remove the first and second reinforcement wood planks, the first and second anti-slip fixing clips, and the through-wall screws, and fill the through-wall bolt holes and screw positioning holes with polyurethane foam glue;

[0027] S7. Construction of exterior wall finishing layer

[0028] Apply exterior paint to the outside of the fireproof board.

[0029] Furthermore, the fireproof panel includes an inner panel and an outer panel, and fireproof rock wool is arranged between the inner panel and the outer panel.

[0030] Furthermore, the material of the inner plate and the material of the outer plate are both calcium silicate.

[0031] Furthermore, the hanging assembly is fixedly connected to the L-shaped angle code support assembly through an external hexagonal self-tapping bolt.

[0032] Furthermore, an expansion head bolt is provided on the L-shaped angle code support assembly, and one end of the expansion head bolt passes through the inner support pad and extends deep into the embedded block.

[0033] Furthermore, a rubber gasket is provided between the expansion head bolt and the L-shaped angle bracket support assembly.

[0034] Furthermore, the material of the L-shaped angle bracket support component is hot-dip galvanized, and the material of the hanging component is stainless steel.

[0035] Furthermore, the inner support pad is made of polyurethane, the bulk density of which is between 80-100 kg / m³, and screw holes are provided on the inner support pad to match the through-wall bolt holes.

[0036] Furthermore, the through-wall screw passes through the screw positioning hole, the screw reserved hole and the through-wall bolt hole in sequence, and a screw sleeve is provided outside the through-wall screw to match the screw positioning hole, the screw reserved hole and the through-wall bolt hole.

[0037] Furthermore, an adjustment slot hole is provided on the adjustment plate, and the adjustment slot hole is elliptical in shape as a whole, and the major axis length of the adjustment slot hole is greater than the outer diameter of the hexagonal self-tapping bolt.

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

[0039] Embedded blocks are left in the aerated concrete block wall and connected to the L-shaped angle code support assembly through expansion head bolts, which solves the problem of insufficient anchoring force of expansion bolts on lightweight base layers in traditional processes and avoids the risk of fireproof panels falling off; insulation pads are set between the L-shaped angle code support assembly and the embedded blocks, and combined with rubber washers between the expansion head bolts and the L-shaped angle code support assembly to block the heat conduction path and reduce heat loss in the thermal bridge area.

[0040] The reverse method of first installing the fireproof board and then pouring the polyurethane foam insulation slurry is adopted to eliminate the spraying and leveling process in the traditional process, shorten the construction process, and the polyurethane foam insulation slurry is seamlessly bonded to the fireproof board after curing, thereby improving the thermal insulation performance and fire protection integrity of the building's exterior wall.

[0041] The adjustment slots on the hanging components allow the hanging components to move along the length of the adjustment slots. When the verticality of the fireproof board is inconsistent with the verticality of the aerated concrete block wall, the verticality of the fireproof board can be calibrated by loosening the hexagonal self-tapping bolts and moving the hanging components back and forth, avoiding the risk of dismantling and reinstalling due to the substandard verticality of the fireproof board and improving construction efficiency.

[0042] The through-wall screws work together with the anti-slip fixing card 1, anti-slip fixing card 2, reinforcement wood square 1 and reinforcement wood square 2 to exert restraint force on the fireproof board, so that the fireproof board can withstand the lateral pressure during the pouring of polyurethane foam insulation slurry, and prevent the fireproof board from displacement or deformation due to uneven force; reinforcement wood square 1 and reinforcement wood square 2 provide vertical support for the fireproof board, which can resist dynamic loads such as wind loads and construction machinery vibrations in high-rise buildings, and ensure structural safety during high-altitude operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1This is a schematic diagram of the structure of the present invention Figure 1 ;

[0044] Figure 2 This is a schematic diagram of the structure of the present invention Figure 2 ;

[0045] Figure 3 It is a partial structural cross-sectional view of the embedded blocks, aerated concrete block wall, L-shaped corner bracket support assembly and hanging assembly in the present invention;

[0046] Figure 4 It is a partial structural diagram of the aerated concrete block wall, inner support pad, wall-penetrating screw, anti-slip fixing clip 1 and reinforcing wood square 2 in the present invention;

[0047] Figure 5 This is a partial structural diagram of the fireproof board, hanging assembly, wall screw and anti-slip fixing card in the present invention;

[0048] Figure 6 It is a schematic diagram of the structure of the hanging assembly, L-shaped angle bracket support assembly, hexagonal self-tapping bolts, thermal insulation pads, expansion head bolts and rubber washers in the present invention;

[0049] Figure 7 yes Figure 5 Enlarged view of point A in the middle;

[0050] Figure 8 It is a partial structural diagram of the wall-penetrating screw and the screw sleeve in the present invention;

[0051] In the picture:

[0052] 1. Embedded block; 2. Aerated concrete block wall; 3. L-shaped angle bracket support assembly; 4. Hanging assembly; 401. Upper slot; 402. Lower slot; 403. Adjustment plate; 5. Thermal insulation pad; 6. Inner support pad; 7. Fireproof board; 701. Inner board; 702. Outer board; 703. Fireproof rock wool; 8. Anti-seepage board; 9. Through-wall screw; 10. Anti-slip fixing clip 1; 11. Anti-slip fixing clip 2; 12. Reinforcement wood square 1; 13. Reinforcement wood square 2; 14. External hexagonal tapping bolt; 15. Expansion head bolt; 16. Rubber washer; 17. Screw sleeve. DETAILED DESCRIPTION

[0053] The present invention is described and illustrated in detail below with reference to the embodiments.

[0054] Example 1

[0055] like Figure 1-8 As shown, the integrated reverse construction method for thermal insulation and fire protection of building exterior walls of the present invention comprises the following steps:

[0056] S1, leave embedded block 1

[0057] Build an aerated concrete block wall 2, wherein a plurality of embedded blocks 1 are arranged in the aerated concrete block wall 2;

[0058] S2. Install L-shaped corner bracket support component 3 and hanging component 4

[0059] After the aerated concrete block wall 2 is built, holes are drilled on the embedded block 1 and the L-shaped corner bracket support assembly 3 is installed. A heat insulation pad 5 is provided between the L-shaped corner bracket support assembly 3 and the embedded block 1.

[0060] The end of the L-shaped angle bracket support assembly 3 away from the heat insulation pad 5 is provided with a plurality of hanging assemblies 4, and the hanging assemblies 4 include an upper card slot 401, a lower card slot 402 and an adjustment plate 403;

[0061] S3, install the inner support pad 6 and drill holes

[0062] A plurality of through-wall bolt holes are drilled on the aerated concrete block wall 2, and a plurality of inner support pads 6 are provided on one side of the aerated concrete block wall 2 close to the L-shaped corner bracket support assembly 3 to match the through-wall bolt holes;

[0063] S4. Install fireproof board 7 and reinforce

[0064] A fireproof board 7 is installed on one side of the aerated concrete block wall 2. One side of the fireproof board 7 is against the inner support pad 6. A plurality of screw positioning holes are provided on the fireproof board 7 to match the through-wall bolt holes.

[0065] An anti-seepage board 8 is laid on the bottom layer of the aerated concrete block wall 2. After the laying is completed, the fireproof board 7 is installed on the bottom layer. The bottom end of the fireproof board 7 is against the anti-seepage board 8, and the top end of the fireproof board 7 is clamped in the lower clamping groove 402 of the hanging component 4.

[0066] Install the through-wall screw 9 by sequentially passing through the bottom layer of fireproof board 7, inner support pad 6 and aerated concrete block wall 2;

[0067] After the bottom layer of fireproof panels 7 is installed, several groups of standard layer fireproof panels 7 are installed in sequence from bottom to top. The bottom ends of the standard layer fireproof panels 7 are clamped in the upper clamping slots 401 of the hanging assembly 4, and the top ends of the standard layer fireproof panels 7 are clamped in the lower clamping slots 402 of the hanging assembly 4.

[0068] Install the through-wall screws 9 by sequentially passing through the fireproof board 7, the inner support pad 6 and the aerated concrete block wall 2 of the standard layer;

[0069] The two ends of the through-wall screw 9 are respectively provided with an anti-slip fixing card 10 and an anti-slip fixing card 2 11. The anti-slip fixing card 10 is provided with a reinforcing wood square 12 in cooperation with the fireproof board 7, and the anti-slip fixing card 2 11 is provided with a reinforcing wood square 2 13 in cooperation with the aerated concrete block wall 2. The anti-slip fixing card 10 and the anti-slip fixing card 2 11 are adjusted so that the verticality of the fireproof board 7 is consistent with the verticality of the aerated concrete block wall 2. After the adjustment is completed, tighten the anti-slip fixing card 10 and the anti-slip fixing card 2 11 so that the reinforcing wood square 12 rests on the fireproof board 7 and the reinforcing wood square 2 13 rests on the aerated concrete block wall 2;

[0070] S5, pouring polyurethane foam insulation slurry

[0071] A pouring cavity is formed between the aerated concrete block wall 2 and the fireproof board 7, and polyurethane foam insulation slurry is poured layer by layer from the bottom to the top of the pouring cavity. The height of each layer of polyurethane foam insulation slurry is between 450-500mm;

[0072] After the polyurethane foam insulation slurry is cured, it is bonded to the fireproof board 7 to form an integrated insulation and fireproof layer;

[0073] S6. Dismantling and recycling

[0074] Remove the reinforcing wood square 12, reinforcing wood square 2 13, anti-slip fixing card 10, anti-slip fixing card 2 11 and through-wall screw 9, and fill the through-wall bolt hole and screw positioning hole with polyurethane foam glue;

[0075] S7. Construction of exterior wall finishing layer

[0076] Apply exterior wall paint on the outside of the fireproof board 7.

[0077] By cooperating with the embedded block 1 and the L-shaped angle code support assembly 3, the problem of insufficient anchoring force on the aerated concrete block wall 2 in the traditional process is solved, and the fireproof board 7 is prevented from falling off; the setting of the thermal insulation pad 5 and the rubber gasket 16 blocks the heat conduction path and reduces the thermal bridge effect; the reverse construction method is adopted, the fireproof board 7 is installed first and then the polyurethane foam insulation slurry is poured, the spraying and leveling process is eliminated, the construction process is shortened, and the polyurethane foam insulation slurry is seamlessly bonded with the fireproof board 7 after curing, thereby improving the thermal insulation performance and fireproof integrity of the exterior wall; the adjustment slot hole of the hanging assembly 4 can calibrate the verticality of the fireproof board 7 to avoid dismantling and reinstalling; the reinforcement system composed of the through-wall screw 9, the anti-slip fixing card 1 10, the anti-slip fixing card 2 11, the reinforcement wood square 1 12 and the reinforcement wood square 2 13 can withstand the lateral pressure when pouring the polyurethane foam insulation slurry and the dynamic load of the high-rise building, ensuring construction safety and structural stability.

[0078] The fireproof board 7 includes an inner board 701 and an outer board 702 , and fireproof rock wool 703 is arranged between the inner board 701 and the outer board 702 .

[0079] The fireproof rock wool 703 has good thermal insulation and fireproof properties, which can improve the overall thermal insulation effect of the exterior wall; at the same time, the fireproof rock wool 703 and the inner plate 701 and outer plate 702 on both sides together form a fire barrier, enhancing the fire resistance limit of the fireproof board 7.

[0080] The inner plate 701 and the outer plate 702 are both made of calcium silicate. Calcium silicate is non-combustible, further enhancing the fireproofing performance of the fireproof board 7. It is also strong and durable, preventing the fireproof board 7 from deformation or breakage.

[0081] The hanging assembly 4 is fixedly connected to the L-shaped angle bracket support assembly 3 through the hexagonal self-tapping bolts 14.

[0082] The hexagonal self-tapping bolt 14 can provide reliable fastening force to ensure the connection stability between the hanging component 4 and the L-shaped angle code support component 3; at the same time, the hexagonal self-tapping bolt 14 is convenient for construction operation and can be quickly tightened or disassembled using a wrench or socket, which is convenient for adjustment during construction and subsequent maintenance.

[0083] An expansion head bolt 15 is provided on the L-shaped angle code support assembly 3 , and one end of the expansion head bolt 15 penetrates through the inner support pad 6 and extends deep into the embedded block 1 .

[0084] The expansion head bolts 15 form a firm mechanical anchoring connection, which enhances the connection strength between the L-shaped angle code support assembly 3 and the aerated concrete block wall 2, solves the problem of weak anchoring of the support assembly on the lightweight base, and ensures the structural safety of the entire building exterior wall.

[0085] A rubber washer 16 is provided between the expansion head bolt 15 and the L-shaped angle bracket support assembly 3 .

[0086] The rubber gasket 16 can block the heat conduction path, further reduce the thermal bridge effect, and improve the thermal insulation performance of the building's exterior wall; at the same time, the rubber gasket 16 can buffer the stress generated when the expansion head bolt 15 is tightened, avoid stress concentration from damaging the L-shaped angle code support assembly 3, and improve the durability of the connection part.

[0087] The material of the L-shaped angle bracket support component 3 is hot-dip galvanized, and the material of the hanging component 4 is stainless steel.

[0088] Both hot-dip galvanized and stainless steel materials have excellent corrosion resistance and are suitable for outdoor environments of building exterior walls. They can effectively resist the erosion of rain, moisture and corrosive substances in the air, and extend the service life of the support and hanging components; at the same time, they ensure that the L-shaped angle bracket support component 3 and the hanging component 4 are not easily deformed during long-term use, and continuously and stably support the fireproof board 7.

[0089] The material of the inner support pad 6 is polyurethane, the bulk density of polyurethane is between 80-100kg / m³, and screw holes are provided on the inner support pad 6 to match the through-wall bolt holes.

[0090] The inner support pad 6 is made of polyurethane with a bulk density of 80-100kg / m³ and has high compressive strength. It can ensure the stability of the size of the pouring cavity between the aerated concrete block wall 2 and the fireproof board 7, and prevent the fireproof board 7 from being deformed due to insufficient support when pouring the polyurethane foam insulation slurry; the thermal conductivity of polyurethane is low, which can effectively block heat conduction, and cooperate with the insulation pad 5 and other components to further reduce thermal bridges; the setting of the screw reserved hole facilitates the installation of the wall-penetrating screw 9, so that the components are accurately connected, improving construction efficiency and installation accuracy.

[0091] The through-wall screw 9 is sequentially arranged through the screw positioning hole, the screw reserved hole and the through-wall bolt hole. The through-wall screw 9 is matched with the screw positioning hole, the screw reserved hole and the through-wall bolt hole with a screw sleeve 17.

[0092] An adjustment slot is provided on the adjustment plate 403 . The adjustment slot is elliptical in shape as a whole. The major axis length of the adjustment slot is greater than the outer diameter of the hexagonal tapping bolt 14 .

[0093] The hanging component 4 can be moved along the length direction of the adjustment slot; when the verticality of the fireproof board 7 is inconsistent with the verticality of the aerated concrete block wall 2, the verticality of the fireproof board 7 can be conveniently calibrated by loosening the hexagonal self-tapping bolt 14 and moving the hanging component 4, without the need to dismantle and reinstall the fireproof board 7, thereby improving construction efficiency; at the same time, this adjustable design can adapt to the verticality deviation of the wall under different construction conditions, and enhance the adaptability to complex wall surfaces.

Claims

1. A method for integrated reverse construction of building exterior wall insulation and fire protection, characterized in that: The following steps are involved: S1. Leave embedded block (1) Building an aerated concrete block wall (2), wherein a plurality of embedded blocks (1) are arranged in the aerated concrete block wall (2); S2. Install the L-shaped corner bracket support assembly (3) and the hanging assembly (4) After the aerated concrete block wall (2) is completed, a hole is drilled on the embedded block (1) and an L-shaped corner support assembly (3) is installed, and a heat insulation pad (5) is provided between the L-shaped corner support assembly (3) and the embedded block (1); A plurality of hanging components (4) are provided at one end of the L-shaped corner support component (3) away from the heat-insulating pad (5), and the hanging components (4) include an upper card slot (401), a lower card slot (402) and an adjustment plate (403); S3. Install the inner support pad (6) and drill holes A plurality of through-wall bolt holes are drilled on the aerated concrete block wall (2), and a plurality of inner support pads (6) are provided on one side of the aerated concrete block wall (2) close to the L-shaped corner support assembly (3) to match the through-wall bolt holes; S4. Install fireproof board (7) and reinforce A fireproof board (7) is installed on one side of the aerated concrete block wall (2), one side of the fireproof board (7) is against the inner support pad (6), and a plurality of screw positioning holes are provided on the fireproof board (7) in conjunction with the through-wall bolt holes; An anti-seepage board (8) is laid on the bottom layer of the aerated concrete block wall (2), and after the laying is completed, a fireproof board (7) is installed on the bottom layer, with the bottom end of the fireproof board (7) resting on the anti-seepage board (8), and the top end of the fireproof board (7) on the bottom layer being clamped in the lower clamping groove (402) of the hanging component (4); Pass through the bottom layer of fireproof board (7), inner support pad (6) and aerated concrete block wall (2) in sequence, and install the through-wall screw (9); After the bottom layer of fireproof panels (7) is installed, several groups of standard layer fireproof panels (7) are installed in sequence from bottom to top, the bottom ends of the standard layer fireproof panels (7) are clamped in the upper clamping slots (401) of the hanging assembly (4), and the top ends of the standard layer fireproof panels (7) are clamped in the lower clamping slots (402) of the hanging assembly (4); Pass through the fireproof board (7) of the standard layer, the inner support pad (6) and the aerated concrete block wall (2) in sequence, and install the through-wall screw (9); The two ends of the through-wall screw (9) are respectively provided with an anti-slipping fixing card 1 (10) and an anti-slipping fixing card 2 (11), and the anti-slipping fixing card 1 (10) is provided with a reinforcing wood square 1 (12) in cooperation with the fireproof board (7), and the anti-slipping fixing card 2 (11) is provided with a reinforcing wood square 2 (13) in cooperation with the aerated concrete block wall (2). The anti-slipping fixing card 1 (10) and the anti-slipping fixing card 2 (11) are adjusted so that the verticality of the fireproof board (7) is consistent with the verticality of the aerated concrete block wall (2). After the adjustment is completed, the anti-slipping fixing card 1 (10) and the anti-slipping fixing card 2 (11) are tightened so that the reinforcing wood square 1 (12) is against the fireproof board (7) and the reinforcing wood square 2 (13) is against the aerated concrete block wall (2); S5, pouring polyurethane foam insulation slurry A pouring cavity is formed between the aerated concrete block wall (2) and the fireproof board (7), and polyurethane foam insulation slurry is poured layer by layer from the bottom to the top of the pouring cavity, and the height of each layer of polyurethane foam insulation slurry is between 450-500mm; After the polyurethane foam insulation slurry is cured, it is bonded to the fireproof board (7) to form an integrated insulation and fireproofing layer; S6. Dismantling and recycling Remove the reinforcing wood square 1 (12), the reinforcing wood square 2 (13), the anti-slip fixing card 1 (10), the anti-slip fixing card 2 (11) and the through-wall screw (9), and fill the through-wall bolt hole and the screw positioning hole with polyurethane foam glue; S7. Construction of exterior wall finishing layer Apply exterior wall paint on the outside of the fireproof board (7).

2. The method for integrated reverse construction of building exterior wall thermal insulation and fire protection according to claim 1, characterized in that: The fireproof board (7) comprises an inner board (701) and an outer board (702), and fireproof rock wool (703) is provided between the inner board (701) and the outer board (702).

3. The method for integrated reverse construction of building exterior wall thermal insulation and fire protection according to claim 2, characterized in that: The material of the inner plate (701) and the material of the outer plate (702) are both calcium silicate.

4. The integrated reverse construction method for building exterior wall thermal insulation and fire protection according to claim 1 is characterized in that: The hanging assembly (4) is fixedly connected to the L-shaped angle code support assembly (3) via an external hexagonal self-tapping bolt (14).

5. The integrated reverse construction method for building exterior wall thermal insulation and fire protection according to claim 1 is characterized in that: An expansion head bolt (15) is provided on the L-shaped angle code support assembly (3), and one end of the expansion head bolt (15) penetrates the inner support pad (6) and penetrates into the interior of the embedded block (1).

6. The integrated reverse construction method for building exterior wall thermal insulation and fire protection according to claim 5 is characterized in that: A rubber washer (16) is provided between the expansion head bolt (15) and the L-shaped angle code support assembly (3).

7. The integrated reverse construction method for building exterior wall thermal insulation and fire protection according to claim 1 is characterized in that: The material of the L-shaped corner code support component (3) is hot-dip galvanized, and the material of the hanging component (4) is stainless steel.

8. The integrated reverse construction method for building exterior wall thermal insulation and fire protection according to claim 1 is characterized in that: The material of the inner support pad (6) is polyurethane, and a screw hole is provided on the inner support pad (6) to match the through-wall bolt hole.

9. The method for integrated reverse construction of building exterior wall thermal insulation and fire protection according to claim 8, characterized in that: The through-wall screw (9) is sequentially passed through the screw positioning hole, the screw reserved hole and the through-wall bolt hole, and a screw sleeve (17) is provided outside the through-wall screw (9) to match the screw positioning hole, the screw reserved hole and the through-wall bolt hole.

10. The integrated reverse construction method for building exterior wall thermal insulation and fire protection according to claim 1, characterized in that: An adjustment slot is provided on the adjustment plate (403), and the adjustment slot is elliptical in shape as a whole. The major axis length of the adjustment slot is greater than the outer diameter of the hexagonal self-tapping bolt (14).

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