Detachable prefabricated external wall insulation board, connecting structure thereof and construction method of building external wall

Abstract

The invention discloses a detachable prefabricated external wall insulation board, a connecting structure of the detachable prefabricated external wall insulation board and a construction method of a building external wall. The detachable prefabricated external wall insulation board comprises a prefabricated external wall insulation board body composed of a prefabricated reinforced concrete external wall component and an insulation board. The component mounting holes are uniformly distributed and vertically penetrate through the prefabricated external wall insulation board body, the sleeves are pre-buried in the component mounting holes, the countersunk sections penetrate through the component mounting holes, the bolts are arranged in the sleeves, the bolts are connected with double-head connectors, the double-head connectors distributed in the insulation board area abut against the insulation board, and the double-head connectors are connected with the prefabricated external wall insulation board body. And the double-end connectors distributed outside the area of the insulation board abut against the prefabricated reinforced concrete outer wall component on the side where the insulation board is located. The connecting structure is convenient to disassemble and has the advantages of reliable, stable and safe connection.

Description

Technical Field

[0001] The invention relates to the technical field of building engineering, and in particular to a detachable prefabricated exterior wall insulation board and a connection structure thereof, and a construction method for an exterior wall of a building. Background Art

[0002] With the rapid development of the construction industry, prefabricated exterior wall insulation panels have been widely used due to their high efficiency and environmental protection characteristics. However, the existing prefabricated exterior wall insulation panel system generally has the problem that the components cannot be disassembled or are difficult to disassemble, resulting in the need to dismantle or replace a large area of ​​exterior wall panels as a whole when the exterior wall is repaired or replaced, causing waste of resources and environmental pollution. In addition, prefabricated exterior wall insulation panels are usually installed on the inner wall using insulation connectors, which are unreliable and easy to fall off the wall in windy weather, posing a safety risk. Summary of the invention

[0003] The purpose of the present invention is to provide a detachable prefabricated exterior wall insulation board and its connection structure, and a construction method for a building exterior wall, so as to solve the problems of difficult disassembly, inconvenient maintenance, unreliable connection, and easy falling off of traditional prefabricated exterior wall insulation boards.

[0004] In order to solve the above technical problems, the present invention provides a detachable prefabricated exterior wall insulation board, including a prefabricated exterior wall insulation board body, the prefabricated exterior wall insulation board body including a prefabricated reinforced concrete exterior wall component and an insulation board embedded therein, and also including component mounting holes evenly distributed in the insulation board area and vertically penetrating the prefabricated exterior wall insulation board body and evenly distributed outside the insulation board area and vertically penetrating the four sides of the prefabricated reinforced concrete exterior wall component, the component mounting hole including a countersunk section and a hole body section, the countersunk section is located on the prefabricated reinforced concrete exterior wall component, a sleeve is pre-embedded in the hole body section, a bolt is penetrated through the countersunk section and the sleeve, the bolt extends out of one side of the insulation board, the head of the bolt abuts against the countersunk section, the bolt is connected with a double-head connector, the double-head connector distributed in the insulation board area abuts against the insulation board, and the double-head connector distributed outside the insulation board area abuts against the prefabricated reinforced concrete exterior wall component on the side where the insulation board is located.

[0005] Furthermore, in the detachable prefabricated exterior wall insulation board provided by the present invention, a water stop ring is provided on the sleeve.

[0006] Furthermore, in the detachable prefabricated exterior wall insulation board provided by the present invention, a water stop ring is provided on the double-head connector.

[0007] Furthermore, in the detachable prefabricated exterior wall insulation board provided by the present invention, the double-head connectors distributed outside the insulation board area are replaced by nuts.

[0008] Furthermore, in the detachable prefabricated exterior wall insulation board provided by the present invention, the prefabricated reinforced concrete exterior wall component adopts UHPC material and has a thickness of not less than 35 mm.

[0009] Furthermore, in the detachable prefabricated exterior wall insulation board provided by the present invention, the prefabricated reinforced concrete exterior wall component adopts ordinary concrete material and has a thickness of not less than 60 mm.

[0010] The present invention also provides a connection structure of the above-mentioned detachable prefabricated exterior wall insulation board, including a detachable prefabricated exterior wall insulation board that can be detachably installed on the inner cast-in-place wall by means of the bolts and the double-head connector, the double-head connector is pre-buried in the inner cast-in-place wall, the countersunk section is provided with a flexible bushing for sealing the head of the bolt, the outer side of the flexible bushing is filled with hole filling material, and a mesh cloth is embedded on the outer side of the prefabricated exterior wall insulation board body to cover each of the hole filling materials.

[0011] The present invention further provides a construction method for a building exterior wall, wherein the above-mentioned detachable prefabricated exterior wall insulation board is used as a non-detachable exterior formwork for the building exterior wall, the non-detachable exterior formwork and the inner formwork of the building exterior wall and the vertical keels and the horizontal keels thereon are installed, one end of the tie screw is set on the horizontal keel through a mountain-shaped clamp, and the other end of the tie screw is threadedly connected to the double-head connector located in the insulation board area to form a building exterior wall formwork; wall reinforcement is constructed in the building exterior wall formwork, a floor support frame is constructed, a prefabricated composite board is horizontally installed on the floor support frame, and one end of the prefabricated composite board is Overlap the inner formwork and the vertical keel, construct the floor slab reinforcement and install the floor slab formwork on the prefabricated composite slab, install the vertically distributed component connecting pieces on the bolts located at the upper end of the prefabricated reinforced concrete exterior wall component and distributed outside the insulation board area, so that the double-head connector is against the prefabricated reinforced concrete exterior wall component through the component connecting piece, and pour concrete in the building exterior wall formwork and floor slab formwork to form an inner cast-in-place wall and cast-in-place floor slab, so that the double-head connector is pre-buried in the inner cast-in-place wall or cast-in-place floor slab, and the upper end of the component connecting piece is partially pre-buried in the cast-in-place floor slab.

[0012] Furthermore, the construction method of the building exterior wall provided by the present invention comprises the following steps: when constructing the upper building exterior wall and floor slab upwards on the constructed building exterior wall, the upper detachable prefabricated exterior wall insulation board is butted with the upper tongue and groove of the detachable prefabricated exterior wall insulation board of the constructed lower building exterior wall through the lower tongue and groove thereon; the double-head connector on the bolt at the lower end of the prefabricated reinforced concrete exterior wall component of the upper detachable prefabricated exterior wall insulation board is removed, the bolt is passed through the component connecting piece exposed on the lower cast-in-place floor slab, the removed double-head connector is reconnected to the bolt, and the component connecting piece is locked on the detachable prefabricated exterior wall insulation board through the double-head connector, so that the detachable prefabricated exterior wall insulation board is connected to the constructed lower building exterior wall as the non-disassembly outer formwork of the upper building exterior wall; when pouring concrete to form the inner cast-in-place wall, the component connecting piece at the lower end of the upper detachable prefabricated exterior wall insulation board is pre-buried in the inner cast-in-place wall.

[0013] Furthermore, in the construction method of the building exterior wall provided by the present invention, a flexible bushing for sealing the head of the bolt is provided at the countersunk section of the component installation hole of the detachable prefabricated exterior wall insulation board, and a hole filling material is filled on the outside of the flexible bushing to make it flush with the component of the detachable prefabricated exterior wall insulation board, and a mesh cloth is embedded on the outside of the prefabricated exterior wall insulation board body to cover each hole filling material.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The detachable prefabricated exterior wall insulation board and its connection structure, as well as the construction method of the exterior wall of the building provided by the present invention, are a novel connecting piece for installing the prefabricated exterior wall insulation board body, which is composed of a plurality of bolts uniformly distributed in the thickness direction of the prefabricated exterior wall insulation board body and a double-head connector connected thereto and located on the inner side of the prefabricated exterior wall insulation board body, and the double-head connector is pre-buried in a cast-in-place structure such as an inner cast-in-place wall or a cast-in-place floor slab, so that the prefabricated exterior wall insulation board body can be reliably installed. Compared with the traditional insulation connecting piece clamping in the construction joint of adjacent prefabricated exterior wall insulation board bodies, the connection strength of the prefabricated exterior wall insulation board body on the cast-in-place structure is enhanced, and the connection has the advantages of reliable, stable and safe connection, and is not easy to fall off from the building structure under the influence of strong wind environment; by removing the bolts on each prefabricated exterior wall insulation board body, each prefabricated exterior wall insulation board body can be removed from the cast-in-place structure, which is convenient for the later maintenance and replacement of the prefabricated exterior wall insulation board and reduces the maintenance cost.

[0016] The connection structure of the detachable prefabricated exterior wall insulation board provided by the present invention can keep the outer side surface of the prefabricated exterior wall insulation board flat and improve the sealing and waterproof performance at the component installation hole, thereby increasing the service life of the building exterior wall by passing the countersunk section of the component installation hole through a flexible bushing and a hole filling material and arranging a mesh cloth. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the side elevation structure of a disassembled prefabricated exterior wall insulation board;

[0018] Figure 2 It is a schematic diagram of the side elevation structure of a detachable prefabricated exterior wall insulation board without bolts and double-end connectors;

[0019] Figure 3 yes Figure 2 Left view of

[0020] Figure 4 yes Figure 2 Right view of;

[0021] Figure 5 It is an enlarged view of the component installation hole node;

[0022] Figure 6 It is a structural diagram of the nodes of the exterior walls and floor slabs of the constructed buildings;

[0023] Figure 7 It is a structural schematic diagram of installing a disassembled prefabricated exterior wall insulation board as a non-disassembly exterior formwork on the nodes of the exterior wall and floor slab of the constructed building;

[0024] Figure 8 It is a structural diagram of installing the building exterior wall formwork on the nodes of the constructed building exterior wall and floor slab;

[0025] Fig. 9 It is a structural schematic diagram of building a floor support frame and upper prefabricated composite slabs on the nodes of the constructed building exterior wall and floor;

[0026] Fig.10 It is a structural diagram of casting the upper inner cast-in-place exterior wall and the upper cast-in-place floor slab;

[0027] Fig.11 It is a front view structural diagram of four adjacent disassembled prefabricated exterior wall insulation panels;

[0028] Fig.12 It is blocked Fig.11 A schematic diagram of the front view structure of each countersunk head section;

[0029] Fig.13 is Fig.12 The front view of the structure of the upper batch of embedded mesh cloth;

[0030] As shown in the figure:

[0031] 100. Demountable prefabricated exterior wall insulation panels;

[0032] 110. Prefabricated exterior wall insulation board body, 111. Prefabricated reinforced concrete exterior wall component, 112. Insulation board, 113. Upper tongue and groove, 114. Lower tongue and groove;

[0033] 120. Component mounting hole;

[0034] 130, casing, 131, water stop ring;

[0035] 140, bolt, 141, gasket;

[0036] 150. Double-ended connector

[0037] 160. Flexible bushing;

[0038] 170. Hole filling material;

[0039] 180, mesh cloth;

[0040] 200, building exterior wall formwork, 210, interior formwork, 220, vertical keel, 230, horizontal keel, 240, tie screw, 250, mountain clip, 260, nut;

[0041] 300, building exterior wall, 310, internal cast-in-place wall;

[0042] 400, floor slab, 410, prefabricated composite slab, 420, cast-in-place floor slab;

[0043] 500, component connecting piece;

[0044] 600. Floor support frame. DETAILED DESCRIPTION

[0045] The present invention is described in detail below in conjunction with the accompanying drawings: The advantages and features of the present invention will become more apparent from the following description. It should be noted that the accompanying drawings are in very simplified form and in non-precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0046] Embodiment 1

[0047] Please refer to Figures 1 to 5, Embodiment 1 of the present invention provides a detachable prefabricated exterior wall insulation board 100, including a prefabricated exterior wall insulation board body 110, the prefabricated exterior wall insulation board body 110 including a prefabricated reinforced concrete exterior wall component 111 and an embedded insulation board 112, and also including component installation holes 120 evenly distributed in the insulation board 112 area and vertically penetrating the prefabricated exterior wall insulation board body 110 and evenly distributed outside the insulation board 112 area and vertically penetrating the four sides of the prefabricated reinforced concrete exterior wall component 111, the component installation hole 120 includes a countersunk section 121 and a hole body section 122, the countersunk section 121 is located in the On the prefabricated reinforced concrete exterior wall component 111, a sleeve 130 is pre-buried in the hole section 122, and a bolt 140 is inserted into the countersunk section 121 and the sleeve 130. The bolt 140 extends out of one side of the insulation board 112, and the head of the bolt 140 abuts against the countersunk section 121. The bolt 140 is connected with a double-head connector 150. The double-head connector 150 distributed in the area of ​​the insulation board 112 abuts against the insulation board 112, and the double-head connector 150 distributed outside the area of ​​the insulation board 112 abuts against the prefabricated reinforced concrete exterior wall component 111 on the side where the insulation board 112 is located. The double-head connector 150 distributed outside the area of ​​the insulation board 112 can be replaced by a nut to meet the later pre-buried length.

[0048] In order to improve the waterproof effect, the detachable prefabricated external wall insulation board 100 provided in the first embodiment of the present invention has a waterproof ring 131 disposed on the sleeve 130 and the double-head connector 150. The waterproof ring 131 on the sleeve 130 can improve the waterproofing of the prefabricated reinforced concrete external wall component 111 of the prefabricated external wall insulation board body 110.

[0049] Among them, in the detachable prefabricated exterior wall insulation board 100 provided in the first embodiment of the present invention, the prefabricated reinforced concrete exterior wall component 111 can be made of ordinary concrete material, and its thickness is not less than 60mm. In order to save materials and avoid waste, the prefabricated reinforced concrete exterior wall component 111 can be made of ultra-high performance concrete (Ultra-High Performance Concrete, UHPC) material, and its thickness is not less than 35mm. It reduces energy consumption and has the advantages of energy saving, emission reduction and environmental protection.

[0050] Embodiment 2

[0051] Please refer to Figures 5 and 6 and Fig.13Embodiment 2 of the present invention provides a connection structure of a detachable prefabricated exterior wall insulation board 100 of the above-mentioned embodiment 1, including a detachable prefabricated exterior wall insulation board 100 that can be detachably installed on an inner cast-in-place wall 310 by means of the bolts 140 and the double-head connector 150, the double-head connector 150 is pre-buried in the inner cast-in-place wall 310, the countersunk section 121 is provided with a flexible bushing 160 for sealing the head of the bolt 140, the outer side of the flexible bushing 160 is filled with a hole filling material 170, and a mesh cloth 180 is embedded on the outer side of the prefabricated exterior wall insulation board body 110 to cover each of the hole filling materials 170.

[0052] The connection structure of the detachable prefabricated exterior wall insulation board 100 provided in the second embodiment of the present invention can keep the outer side surface of the prefabricated exterior wall insulation board 112 flat and improve the sealing and waterproof performance at the component installation hole 120 by passing the countersunk section 121 of the component installation hole 120 through the flexible bushing 160 and the hole filling material 170 and setting the mesh cloth 180, thereby improving the service life of the building exterior wall 300. In order to improve the reliability of the bolt 140 in the countersunk section 121, the head of the bolt 140 is pressed against the countersunk section 121 through the gasket 141.

[0053] Embodiment 3

[0054] Please refer to Figures 6 to 10 Embodiment 3 of the present invention provides a construction method of a building exterior wall 300, comprising:

[0055] Step 710, the disassembled prefabricated exterior wall insulation board 100 of the first embodiment is used as the non-disassembly exterior formwork of the building exterior wall 300, the non-disassembly exterior formwork and the interior formwork 210 of the building exterior wall 300 and the vertical keels 220 and the horizontal keels 230 thereon are installed, one end of the tie screw 240 is set on the horizontal keel 230 through the mountain-shaped clamp 250, and the other end of the tie screw 240 is threadedly connected to the double-head connector 150 located in the insulation board 112 area to form the building exterior wall formwork. The mountain-shaped clamp 250 is fixed to the horizontal keel 230 by the nut 260 threadedly connected to the tie screw 240. In order to improve the locking strength of the mountain-shaped clamp 250, the nut 260 can adopt a double nut structure.

[0056] Step 720, construct wall reinforcement (not shown) in the building exterior wall formwork.

[0057] Step 730, construct the floor support frame 600, horizontally install the prefabricated composite board on the floor support frame 600, overlap one end of the prefabricated composite board on the inner formwork 210 and the vertical keel 220, construct the floor reinforcement on the prefabricated composite board and install the floor formwork (not shown).

[0058] Step 740, install a vertically distributed component connecting piece 500 on the bolt 140 located at the upper end of the prefabricated reinforced concrete exterior wall component 111 and distributed outside the insulation board 112 area, so that the double-head connector 150 is against the prefabricated reinforced concrete exterior wall component 111 through the component connecting piece 500.

[0059] Step 750, pouring concrete in the building exterior wall formwork and floor formwork to form the inner cast-in-place wall 310 and the cast-in-place floor 420, so that the double-head connector 150 is pre-buried in the inner cast-in-place wall 310 or the cast-in-place floor 420, and the upper end of the component connecting piece 500 is partially pre-buried in the cast-in-place floor 420.

[0060] Please refer to Figures 6 to 8 The construction method of the building exterior wall 300 provided in the third embodiment of the present invention, in step 710, when constructing the upper building exterior wall 300 and the floor slab upward on the constructed building exterior wall 300, further includes:

[0061] Step 711, the upper detachable prefabricated exterior wall insulation board 100 is butted to the upper tongue and groove 113 of the detachable prefabricated exterior wall insulation board 100 of the constructed lower building exterior wall 300 through the lower tongue and groove 114. For sealing, the butt joints of the upper and lower detachable prefabricated exterior wall insulation boards 100 are provided with sealing materials such as sealant.

[0062] Step 712, remove the double-head connector 150 on the bolt 140 at the lower end of the prefabricated reinforced concrete exterior wall component 111 of the upper detachable prefabricated exterior wall insulation board 100, pass the bolt 140 through the component connecting piece 500 exposed on the lower cast-in-place floor slab 420, restore the disassembled double-head connector 150 to the bolt 140, and lock the component connecting piece 500 to the detachable prefabricated exterior wall insulation board 100 through the double-head connector 150, so as to connect the detachable prefabricated exterior wall insulation board 100 to the constructed lower building exterior wall 300 as the non-disassembly external formwork of the upper building exterior wall 300.

[0063] Step 713 , when pouring concrete to form the inner cast-in-place wall 310 , the component connecting piece 500 at the lower end of the upper detachable prefabricated exterior wall insulation board 100 is pre-buried in the inner cast-in-place wall 310 .

[0064] Please refer to Figure 5 , Figures 11 to 13In order to improve the waterproof and thermal insulation performance, the construction method of the building exterior wall 300 provided in the third embodiment of the present invention is provided with a flexible bushing 160 for sealing the head of the bolt 140 in the countersunk section 121 of the component installation hole 120 of the detachable prefabricated exterior wall insulation board 100, and a hole filling material 170 is filled on the outside of the flexible bushing 160 to make it flush with the component of the detachable prefabricated exterior wall insulation board 100, and a mesh cloth 180 is embedded on the outside of the prefabricated exterior wall insulation board body 110 to cover each of the hole filling materials 170.

[0065] The above-mentioned embodiment of the present invention provides a detachable prefabricated exterior wall insulation board 100 and its connection structure, and a construction method for the building exterior wall 300. A new type of connector for installing the prefabricated exterior wall insulation board body 110 is formed by a plurality of bolts 140 evenly distributed in the thickness direction of the prefabricated exterior wall insulation board body 110 and a double-head connector 150 connected thereto and located on the inner side of the prefabricated exterior wall insulation board body 110. The double-head connector 150 is pre-buried in a cast-in-place structure such as an inner cast-in-place wall 310 or a cast-in-place floor slab 420, so that the prefabricated exterior wall insulation board body 110 can be reliably installed. Compared with the traditional insulation connector between adjacent prefabricated exterior walls, the prefabricated exterior wall insulation board body 110 can be installed in a removable prefabricated exterior wall insulation board body 100. Compared with the clamping method within the construction joint of the wall insulation board body 110, the connection strength of the prefabricated exterior wall insulation board body 110 on the cast-in-place structure is enhanced, and it has the advantages of reliable, stable and safe connection, and is not easy to fall off from the building structure under the influence of strong wind environment; when it is necessary to repair or replace the exterior wall surface due to component reasons, the holes blocked by the original components can be directly cleaned out, and by removing the bolts 140 on each prefabricated exterior wall insulation board body 110, each prefabricated exterior wall insulation board body 110 can be removed from the cast-in-place structure, which facilitates the later repair and replacement of the prefabricated exterior wall insulation board 112 and reduces maintenance costs.

[0066] The present invention is not limited to the above-mentioned specific implementation modes. Obviously, the above-mentioned embodiments are only some embodiments of the embodiments of the present invention, but not all embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention. Those skilled in the art can make other levels of modifications and changes to the present invention. In this way, if these modifications and changes of the present invention fall within the scope of the claims of the present invention, the present invention is also intended to include these changes and changes.

Claims

1. A detachable prefabricated exterior wall insulation board, characterized in that: It includes a prefabricated exterior wall insulation board body, which includes a prefabricated reinforced concrete exterior wall component and an insulation board embedded therein, and also includes component mounting holes evenly distributed in the insulation board area and vertically penetrating the prefabricated exterior wall insulation board body, and evenly distributed outside the insulation board area and vertically penetrating the four sides of the prefabricated reinforced concrete exterior wall component, the component mounting hole includes a countersunk section and a hole body section, the countersunk section is located on the prefabricated reinforced concrete exterior wall component, a sleeve is pre-embedded in the hole body section, and bolts are penetrated through the countersunk section and the sleeve, the bolts extend out of one side of the insulation board, the heads of the bolts abut against the countersunk section, the bolts are connected with double-head connectors, the double-head connectors distributed in the insulation board area abut against the insulation board, and the double-head connectors distributed outside the insulation board area abut against the prefabricated reinforced concrete exterior wall component on the side where the insulation board is located.

2. The detachable prefabricated exterior wall insulation board according to claim 1, characterized in that: A water stop ring is arranged on the sleeve.

3. The detachable prefabricated exterior wall insulation board according to claim 1, characterized in that: The double-head connector is provided with a water stop ring.

4. The detachable prefabricated exterior wall insulation board according to claim 1, characterized in that: The double-head connectors distributed outside the insulation board area are replaced by nuts.

5. The detachable prefabricated exterior wall insulation board according to claim 1, characterized in that: The prefabricated reinforced concrete exterior wall components are made of UHPC material and have a thickness of not less than 35 mm.

6. The detachable prefabricated exterior wall insulation board according to claim 1, characterized in that: The prefabricated reinforced concrete exterior wall components are made of ordinary concrete materials and have a thickness of no less than 60 mm.

7. A connection structure of a detachable prefabricated exterior wall insulation board according to claim 1, characterized in that: It comprises a detachable prefabricated exterior wall insulation board which can be detachably installed on the inner cast-in-place wall by means of the bolts and the double-head connector, the double-head connector is pre-buried in the inner cast-in-place wall, the countersunk section is provided with a flexible bushing for sealing the head of the bolt, the outer side of the flexible bushing is filled with hole filling material, and a mesh cloth is embedded on the outer side of the prefabricated exterior wall insulation board body to cover each hole filling material.

8. A construction method for a building exterior wall, characterized in that: The disassembled prefabricated exterior wall insulation board described in claim 1 is used as the non-disassembly exterior formwork of the building exterior wall, the non-disassembly exterior formwork and the interior formwork of the building exterior wall and the vertical keels and transverse keels thereon are installed, one end of the tie screw is set on the transverse keel through the mountain-shaped clamp, and the other end of the tie screw is threadedly connected to the double-head connector located in the insulation board area to form the building exterior wall formwork; Construct wall reinforcement within the building exterior wall formwork; Construction of floor support frame; Install the prefabricated composite slab horizontally on the floor support frame, overlap one end of the prefabricated composite slab on the inner formwork and the vertical keel, construct the floor reinforcement on the prefabricated composite slab and install the floor formwork; Installing vertically distributed component connecting pieces on the bolts located at the upper end of the prefabricated reinforced concrete exterior wall component and distributed outside the insulation board area, so that the double-head connector is pressed against the prefabricated reinforced concrete exterior wall component through the component connecting pieces; Concrete is poured in the building exterior wall formwork and floor slab formwork to form inner cast-in-place walls and cast-in-place floors, the double-head connector is pre-buried in the inner cast-in-place wall or cast-in-place floor slab, and the component connecting piece at the upper end is pre-buried in the cast-in-place floor slab.

9. The construction method of the building exterior wall according to claim 8, characterized in that: When constructing the upper building exterior wall and floor slab upward on the constructed building exterior wall, the upper detachable prefabricated exterior wall insulation board is butted at the upper tongue and groove of the detachable prefabricated exterior wall insulation board of the constructed lower building exterior wall through the lower tongue and groove on the upper tongue and groove; Remove the double-head connector on the bolt at the lower end of the prefabricated reinforced concrete exterior wall component of the upper detachable prefabricated exterior wall insulation board, pass the bolt through the component connecting piece exposed on the lower cast-in-place floor slab, reconnect the removed double-head connector to the bolt, and lock the component connecting piece on the detachable prefabricated exterior wall insulation board through the double-head connector, so as to connect the detachable prefabricated exterior wall insulation board as the non-detachable exterior formwork of the upper building exterior wall to the constructed lower building exterior wall; When pouring concrete to form the inner cast-in-place wall, the component connecting piece at the lower end of the upper detachable prefabricated exterior wall insulation board is pre-buried in the inner cast-in-place wall.

10. The construction method of the building exterior wall according to claim 8, characterized in that: A flexible bushing for sealing the head of the bolt is arranged at the countersunk section of the component installation hole of the detachable prefabricated exterior wall insulation board, and a hole filling material is filled on the outside of the flexible bushing to make it flush with the component of the detachable prefabricated exterior wall insulation board, and a mesh cloth is embedded on the outside of the prefabricated exterior wall insulation board body to cover each hole filling material.

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