Building external thermal insulation anti-falling device and installation method

Abstract

The application discloses a building external thermal insulation anti-falling device and a mounting method, relates to the technical field of external wall maintenance, and comprises a plurality of insulation boards which are arranged at equal intervals on a building facade, and an anti-falling assembly which is arranged between two adjacent insulation boards and locks the end portions of the two insulation boards, wherein the anti-falling assembly comprises a connecting member which connects the two adjacent insulation boards together and a locking assembly which has a self-locking function and locks the connecting member on the building facade. The application has the advantages of simple structure, convenient construction and reduced construction cost. The self-locking locking assembly can effectively absorb and disperse stress and prevent the insulation boards from falling. The application comprehensively considers the fireproof isolation effect.

Description

Technical Field

[0001] The present invention relates to the technical field of exterior wall maintenance, and more particularly to the technical field of a building exterior thermal insulation anti-falling device and an installation method. Background Art

[0002] At present, the main method of building exterior wall insulation technology is to stick insulation boards and reinforce them with anchors. However, in actual applications, due to non-standard construction, material aging, and environmental factors (such as wind pressure, temperature changes, etc.), insulation boards often fall off, posing a great hidden danger to building safety. Based on actual engineering research, Liu Delin found that the existing insulation board anti-falling measures mainly include increasing the number of anchors and using high-performance adhesives (referenced literature: Liu Delin. Analysis of Construction Technology of Exterior Wall Insulation of House Construction Projects "Foshan Ceramics". 2024, 34(09), pp. 144-146.). However, while these methods improve the stability of insulation boards, they also increase construction costs and complexity, but the durability is not greatly improved.

[0003] In addition, there are a large number of patented technologies that use improved anchor nails or anti-falling anchor plate components for reinforcement, as follows:

[0004] Patent publication number CN116025075A discloses a method for anti-slip anchoring of insulation panels attached to the exterior walls of existing buildings. However, this patented method, which simply strengthens the anti-slip anchoring, has the following serious drawbacks: dense anti-slip anchors compress the insulation material, reducing the performance of the insulation layer and affecting the insulation effect; over time, the anchors may loosen and fall off, still posing a safety hazard; damage may occur to the exterior surface structure of the wall, affecting the overall stability and safety of the building; and the method requires a large number of anchors and other auxiliary materials, requiring a high labor cost, which increases the difficulty and cost of construction.

[0005] Patent publication number CN118653585A discloses a structure for preventing the ecological insulation board from falling off the exterior wall. This patent utilizes a bearing plate, support bars, and connectors. The support bars and the bearing plate form support grooves for the ecological insulation board, minimizing the likelihood of the board falling off the exterior wall. This technology primarily utilizes zoned adhesive injection to prevent the board from falling off.

[0006] While the prior art disclosed in the aforementioned patents and papers has alleviated the problem of insulation board falling off to a certain extent, it still presents disadvantages such as potential safety hazards in later stages, difficulty in construction, high cost, inconvenient maintenance, aging of adhesives, and loosening of anti-fall anchors. At the same time, the aforementioned technologies all take insulation into consideration. Summary of the Invention

[0007] The present invention aims to address the technical issues of prior art, such as poor insulation, aging adhesives, and loosening of anti-fall anchors. The present invention provides a building exterior insulation anti-fall device and installation method. This device offers the advantages of a simple structure, convenient installation, and low cost. It effectively prevents the fall of building facade insulation panels while also providing for the installation of fire barriers.

[0008] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0009] One aspect of the present invention provides an anti-falling device for exterior thermal insulation of a building, comprising a plurality of thermal insulation boards arranged at equal intervals on the exterior facade of the building, an anti-falling component for locking the ends of the two thermal insulation boards being arranged between two adjacent thermal insulation boards, the anti-falling component comprising a connecting member for connecting the two adjacent thermal insulation boards together and a locking component with a self-locking function for locking the connecting member on the exterior facade of the building.

[0010] In one embodiment, the locking assembly includes a first locking assembly at one end of each insulation board and a second first locking assembly at the other end.

[0011] In one embodiment, the first locking assembly includes a fireproof isolation strip disposed between two adjacent insulation panels, two angle steel aluminum alloy keels disposed at the upper and lower ends of each fireproof isolation strip, a π-shaped cap plate, and two self-locking nails. Each angle steel aluminum alloy keel is stepped, and each angle steel aluminum alloy keel is partially embedded in the corresponding insulation panel. The π-shaped cap is disposed outside the fireproof isolation strip and the two angle steel aluminum alloy keels, and the two horizontal legs of the π-shaped cap extend into the interior of the two adjacent insulation panels respectively.

[0012] Each locking nail passes through a horizontal section of a supporting leg of a corresponding π-shaped cap, and the corresponding angle steel aluminum alloy keel is locked in a self-locking nail nut groove.

[0013] Specifically, insulation panels are installed on the exterior facades (exterior walls) of buildings to provide thermal insulation. Fire barriers prevent flames from spreading along the insulation panels in the event of a fire.

[0014] The self-locking nail nut groove is buried in the exterior wall of the building to accommodate the self-locking nails, which work together with the self-locking nails to fix the insulation board and the angle steel aluminum alloy keel.

[0015] The π-shaped cap plate plays the role of protecting the fire isolation zone; in addition, together with the upper and lower two angle steel aluminum alloy keels, it plays the role of limiting the insulation board.

[0016] In one embodiment, the inner sides of the two vertical sections of the π-shaped cap legs are provided with inner self-locking structures, and the outer sides of each angle steel aluminum alloy keel are provided with outer self-locking structures that cooperate with the corresponding inner self-locking structures.

[0017] Specifically, the angle steel aluminum alloy keel separates and limits the insulation panels, while also absorbing some of their weight. It also forms a locking frame with the protrusions above and below the π-shaped capping plate, limiting the panels' displacement. Finally, the cavity between the angle steel aluminum alloy keels allows for the installation of fireproof isolation strips. The angle steel aluminum alloy keel is pre-perforated at the junction with the π-shaped capping plate, where blind rivets are required, and at the insulation board, where self-locking rivets are required, to ensure securement.

[0018] In one embodiment, each angle steel aluminum alloy keel is provided with a portion for installing a blind-end aluminum rivet at the junction with the π-shaped cap plate.

[0019] In one embodiment, an aluminum alloy support bar is provided between the fireproof isolation strip and the corresponding π-shaped cap.

[0020] Specifically, the aluminum alloy stays serve to prevent deformation of the two angle steel aluminum alloy keels above and below the fire isolation.

[0021] In one embodiment, an external thread that cooperates with the building facade is provided on the outside of each locking nail nut groove, an internal barb structure is provided on the inside of each locking nail nut groove, and an external barb structure that cooperates with the internal barb structure is provided on the outer wall of each locking nail. The internal barb structure is inclined inward and the external barb structure is inclined outward. The internal barb structure and the external barb structure cooperate to form a non-return mechanism.

[0022] Specifically, the outer side of the self-locking nail nut groove has its own thread and the inner side has a barb structure to prevent the self-locking nail from falling off.

[0023] In one embodiment, a highly elastic material glue is injected into the gap between the self-locking nail nut slot and the corresponding self-locking nail.

[0024] Specifically, the gap between the self-locking nail nut slot and the self-locking nail is injected with high elastic material glue (such as rubber, silicone, etc.) to absorb and disperse the stress changes of the insulation board caused by temperature changes, wind pressure and other factors.

[0025] In one embodiment, the first locking assembly includes a first locking nail passing through the insulation board.

[0026] Another aspect of the present invention provides a method for installing a building exterior thermal insulation anti-falling device, which is used to install the above-mentioned building exterior thermal insulation anti-falling device, comprising the following steps:

[0027] S1. Draw a diagram of the insulation board fixing components based on the structure and area of ​​the building's exterior facade. This diagram includes the locations of the self-locking nail installation points, fire barrier strips, and capping panels. The specific locations should be determined in accordance with Article 5.2.7 of the Technical Specification for the Application of Thermal Insulation and Fireproof Composite Panels (JGJ / T 350-2015) and the corresponding provisions of the Technical Standard for External Wall Insulation Engineering (JGJ 144-2019), which stipulate the number of insulation boards per square meter corresponding to the number of building floors.

[0028] S2. For new buildings, pre-buried self-locking screw nut slots according to the design drawings are sufficient; for existing buildings, the wall surface base should be treated first, then the wall should be drilled according to the drawings, and then the self-locking screw nut slots should be tapped;

[0029] S3. Temporary fixation of angle steel aluminum alloy keels. In order to facilitate the division of the insulation board installation area by piece and distinguish the installation position of the fire isolation zone, the angle steel aluminum alloy keels are temporarily fixed first to facilitate the installers to clearly identify the installation area. The angle steel aluminum alloy keels can be temporarily fixed with cement nails, hardwood plugs, etc.

[0030] S4. Installation of external insulation: First, temporarily fix the insulation board. You can use cement nails, hardwood plugs, etc. to fix it. After adjusting the installation angle and position of the insulation board, inject high-elasticity glue (such as rubber, silicone, etc.) into the self-locking nail nut slot to absorb and disperse the stress changes of the insulation board caused by factors such as temperature changes and wind pressure. Then, drive the self-locking nails of the insulation board. Finally, inject glue at the joints of each insulation board to form each insulation board into a whole.

[0031] S5. Installation of fire isolation belt: First, lay the fire isolation belt in the cavity between the angle steel aluminum alloy keels, and place the aluminum alloy support strips on the surface after laying; then install the π-shaped cap; then inject glue into the self-locking nail nut groove of the angle steel aluminum alloy keel; then, hammer in the self-locking nails of the angle steel aluminum alloy keel; finally, hammer in the core-pulling aluminum rivets at the joint of the angle steel aluminum alloy and the cap plate to further prevent the cap plate from falling off.

[0032] The beneficial effects of the present invention are as follows:

[0033] 1. Simple structure, easy construction, and reduced construction costs. Self-locking elastic connectors effectively absorb and disperse stress, preventing the insulation board from falling off. It also provides comprehensive fire isolation, achieving integrated exterior wall insulation and fire isolation.

[0034] 2. The angle steel aluminum alloy keel separates and limits the insulation panels, while also absorbing some of their weight. It also forms a locking frame with the protrusions above and below the π-shaped capping plate, limiting the panels' displacement. Finally, the cavity between the angle steel aluminum alloy keels allows for the installation of fireproof isolation strips. The angle steel aluminum alloy keel is pre-perforated at the junction with the π-shaped capping plate where blind rivets are required, as well as at the insulation board where self-locking rivets are required, to ensure securement.

[0035] 3. Highly elastic glue (such as rubber, silicone, etc.) is injected into the gap between the self-locking nail nut slot and the self-locking nail to absorb and disperse the stress changes of the insulation board caused by temperature changes, wind pressure and other factors.

[0036] 4. The outer side of the self-locking nail nut groove has its own thread and the inner side has a barb structure to prevent the self-locking nail from falling off. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0038] Figure 1 This is a structural schematic diagram of a building exterior thermal insulation and anti-falling device according to the present invention;

[0039] Figure 2 It is a structural diagram of the self-locking nail nut slot and the self-locking nail;

[0040] Figure 3 This is the connection diagram of the π-shaped cap plate and the angle steel aluminum alloy keel;

[0041] Figure 4 This is the installation detail drawing of the π-shaped cap plate;

[0042] Figure 5 It is a flow chart of the installation method of the anti-falling device;

[0043] Figure markings: 1-building facade, 2-self-locking nail nut groove, 3-self-locking nail, 4-insulation board, 5-π-shaped cap, 6-aluminum alloy support bar, 7-angle steel aluminum alloy keel, 8-fire isolation belt, 9-blind aluminum rivet, 21-inner barb structure, 31-outer barb structure, 51-inner self-locking structure, 71-outer self-locking structure. DETAILED DESCRIPTION

[0044] To make the technical problems, technical solutions, and technical effects of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0045] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are intended to fall within the scope of protection of the present invention.

[0046] It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings. In addition, the terms "first," "second," etc. are used only to distinguish the descriptions and are not to be understood as indicating or implying relative importance.

[0047] In the description of the embodiments of the present invention, it should be noted that the terms "inside", "outside", "upper", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0048] Example 1

[0049] like Figures 1 to 4 As shown, this embodiment provides an anti-falling device for exterior thermal insulation of a building, comprising a plurality of thermal insulation boards 4 arranged at equal intervals on the exterior facade 1 of the building, an anti-falling component for locking the ends of the two thermal insulation boards 4 is arranged between two adjacent thermal insulation boards 4, and the anti-falling component comprises a connecting member for connecting the two adjacent thermal insulation boards 4 together and a locking component with a self-locking function for locking the connecting member on the exterior facade 1 of the building.

[0050] In one embodiment, the locking assembly includes a first locking assembly located at one end of each insulation board 4 and a second first locking assembly at the other end.

[0051] In one embodiment, the first locking assembly includes a fireproof isolation strip 8 provided between two adjacent insulation boards 4, two angle steel aluminum alloy keels 7 provided at the upper and lower ends of each fireproof isolation strip 8, a π-shaped cap 5 plate, and two self-locking nails 3. Each angle steel aluminum alloy keel 7 is stepped, and each angle steel aluminum alloy keel 7 is partially embedded in the corresponding insulation board 4. The π-shaped cap 5 is provided outside the fireproof isolation strip 8 and the two angle steel aluminum alloy keels 7. The two horizontal sections of the legs of the π-shaped cap 5 extend into the interior of the two adjacent insulation boards 4 respectively.

[0052] Each locking nail 3 passes through a horizontal section of a supporting leg of the corresponding π-shaped cap 5 and the corresponding angle steel aluminum alloy keel 7 and is locked in the self-locking nail nut groove 2.

[0053] Specifically, the insulation board 4 is installed on the building facade 1 (exterior wall) to play the role of building thermal insulation. The fire isolation belt 8 plays the role of preventing the flame from spreading along the insulation board 4 in the event of a fire.

[0054] The self-locking nail nut groove 2 is buried in the outer wall of the building to accommodate the self-locking nail 3, and plays a role in cooperating with the self-locking nail 3 to fix the insulation board 4 and the angle steel aluminum alloy keel 7.

[0055] The π-shaped cap 5 plays a role in protecting the fire isolation zone 8; in addition, together with the upper and lower two angle steel aluminum alloy keels 7, it plays a role in limiting the position of the insulation board 4.

[0056] In one embodiment, the inner sides of the two vertical sections of the π-shaped cap 5 are provided with inner self-locking structures 51, and the outer sides of each angle steel aluminum alloy keel 7 are provided with outer self-locking structures 71 that cooperate with the corresponding inner self-locking structures 51.

[0057] Specifically, the angle steel aluminum alloy keel 7 separates and limits the insulation panels 4, while also absorbing some of their gravity. It also forms a locking frame with the upper and lower protrusions of the π-shaped cap 5, limiting the displacement of the insulation panels 4. Finally, the cavity between the angle steel aluminum alloy keels 7 allows for the installation of a fire barrier 8. The angle steel aluminum alloy keel 7 is pre-perforated at the junction with the π-shaped cap 5 where blind aluminum rivets 9 are required, as well as at the insulation panels 4 where self-locking rivets 3 are required, to ensure securement.

[0058] In one embodiment, each angle steel aluminum alloy keel 7 is provided with a portion for installing a blind aluminum rivet 9 at the joint with the π-shaped cap 5 plate.

[0059] In one embodiment, an aluminum alloy stay 6 is provided between the fireproof isolation strip 8 and the corresponding π-shaped cap 5 .

[0060] Specifically, the aluminum alloy stays 6 play a role in preventing the deformation of the two upper and lower angle steel aluminum alloy keels 7 of the fireproof isolation.

[0061] In one embodiment, the outer side of each locking nail nut groove 2 is provided with an external thread that cooperates with the building facade 1, the inner side of each locking nail nut groove 2 is provided with an internal barb structure 21, and the outer wall of each locking nail 3 is provided with an external barb structure 31 that cooperates with the internal barb structure 21. The internal barb structure 21 is inclined inward, and the external barb structure 31 is inclined outward. The internal barb structure 21 and the external barb structure 31 cooperate to form a non-return mechanism.

[0062] Specifically, the outer side of the self-locking nail nut groove 2 is provided with a thread, and the inner side is provided with a barb structure to prevent the self-locking nail 3 from falling off.

[0063] In one embodiment, a highly elastic material glue is injected into the gap between the self-locking nail nut slot 2 and the corresponding self-locking nail 3 .

[0064] Specifically, the gap between the self-locking nail nut slot 2 and the self-locking nail 3 is injected with a highly elastic material glue (such as rubber, silicone, etc.) to absorb and disperse the stress changes of the insulation board 4 caused by factors such as temperature changes and wind pressure.

[0065] In one embodiment, the first locking assembly includes a first locking nail passing through the insulation board 4 .

[0066] Example 2

[0067] This embodiment provides a method for installing a building exterior thermal insulation anti-falling device, which is used to install the above-mentioned building exterior thermal insulation anti-falling device, including the following steps:

[0068] S1. Based on the structure and area of ​​the building facade 1, draw a diagram of the insulation board 4 fixing components; this includes the installation locations of the self-locking nails 3, the fire barrier 8, and the capping board. The specific number of insulation boards per square meter corresponding to the number of building floors is determined in accordance with Article 5.2.7 of the "Technical Specification for the Application of Thermal Insulation and Fireproof Composite Panels" (JGJ / T 350-2015) and the corresponding provisions of the "Technical Standard for External Wall Insulation Engineering" (JGJ 144-2019).

[0069] S2. For new buildings, pre-embed the self-locking nail nut slot 2 according to the design drawing; for existing buildings, the wall surface base should be treated first, then the wall should be drilled according to the drawing, and then the self-locking nail nut slot 2 should be tapped;

[0070] S3. Temporary fixation of the angle steel aluminum alloy keel 7. In order to facilitate the division of the insulation board 4 installation area by piece and distinguish the installation position of the fire isolation belt 8, the angle steel aluminum alloy keel 7 is temporarily fixed first to facilitate the installer to clearly identify the installation area. The angle steel aluminum alloy keel 7 can be temporarily fixed with cement nails, hardwood plugs, etc.

[0071] S4. Installation of external insulation parts: First, temporarily fix the insulation board 4, which can be fixed with cement nails, hardwood plugs, etc. After adjusting the installation angle and position of the insulation board 4; inject high-elastic material glue (such as rubber, silicone, etc.) into the self-locking nail nut groove 2 to absorb and disperse the stress changes of the insulation board 4 caused by factors such as temperature changes and wind pressure; then, drive the self-locking nails 3 of the insulation board 4; finally, inject glue at the joints of each insulation board 4 to form each insulation board 4 into a whole;

[0072] S5. Installation of the fireproof isolation belt 8: First, pave the fireproof isolation belt 8 in the cavity between the angle steel aluminum alloy keels 7, and place the aluminum alloy support strips on the surface after paving; then install the π-shaped cap 5; then inject glue into the self-locking nail nut groove 2 at the angle steel aluminum alloy keel 7; then, drive the self-locking nail 3 at the angle steel aluminum alloy keel 7; finally, drive the core-pulling aluminum rivet 9 at the junction of the angle steel aluminum alloy and the cap plate to further prevent the cap plate from falling.

Claims

1. A building exterior thermal insulation anti-falling device, characterized in that: The invention comprises a plurality of insulation boards (4) arranged at equal intervals on a building facade (1), an anti-falling assembly for locking the ends of the two insulation boards (4) being arranged between two adjacent insulation boards (4), the anti-falling assembly comprising a connecting member for connecting the two adjacent insulation boards (4) together and a locking assembly with a self-locking function for locking the connecting member on the building facade (1); The locking assembly includes a first locking assembly located at one end of each of the insulation boards (4) and a second first locking assembly at the other end; The first locking assembly comprises a fireproof isolation zone (8) arranged between two adjacent insulation boards (4), two angle steel aluminum alloy keels (7) arranged at the upper and lower ends of each fireproof isolation zone (8), a π-shaped cap (5) plate and two self-locking nails (3), each of the angle steel aluminum alloy keels (7) is stepped, and each of the angle steel aluminum alloy keels (7) is partially embedded in the corresponding insulation board (4), the π-shaped cap (5) is arranged on the outside of the fireproof isolation zone (8) and the two angle steel aluminum alloy keels (7), and the two horizontal sections of the legs of the π-shaped cap (5) respectively extend into the interior of the two adjacent insulation boards (4); Each of the self-locking nails (3) passes through a horizontal section of a corresponding leg of the π-shaped cap (5), and the corresponding angle steel aluminum alloy keel (7) is locked in the self-locking nail nut slot (2); The inner sides of the two vertical sections of the legs of the π-shaped cap (5) are provided with inner self-locking structures (51), and the outer sides of the angle steel aluminum alloy keels (7) are provided with outer self-locking structures (71) that cooperate with the corresponding inner self-locking structures (51); An aluminum alloy stay (6) is provided between the fireproof isolation zone (8) and the corresponding π-shaped cap (5); The outer side of each self-locking nail nut groove (2) is provided with an external thread that cooperates with the building facade (1), the inner side of each self-locking nail nut groove (2) is provided with an internal barb structure (21), and the outer wall of each self-locking nail (3) is provided with an external barb structure (31) that cooperates with the internal barb structure (21), the internal barb structure (21) is inclined inwardly, and the external barb structure (31) is inclined outwardly, and the internal barb structure (21) and the external barb structure (31) cooperate to form a non-return mechanism; Highly elastic material glue is injected into the gap between the self-locking nail nut slot (2) and the corresponding self-locking nail (3).

2. A building exterior thermal insulation anti-falling device according to claim 1, characterized in that: Each of the angle steel aluminum alloy keels (7) is provided with a portion for installing a core-pulling aluminum rivet (9) at the junction with the π-shaped cap (5) plate.

3. A building exterior thermal insulation anti-falling device according to claim 2, characterized in that: The first locking assembly comprises a first locking nail passing through the insulation board (4).

4. A method for installing a building exterior thermal insulation anti-falling device, used for installing a building exterior thermal insulation anti-falling device according to any one of claims 1 to 3, characterized in that: The steps include: S1. Draw a diagram of the fixing components of the insulation board (4) based on the structure and area of ​​the building facade (1); S2. For newly built buildings, the self-locking screw nut slots (2) can be pre-buried according to the design drawing; for existing buildings, the wall surface base should be treated first, and then the wall should be drilled according to the drawing, and then the self-locking screw nut slots (2) should be inserted; S3, the angle steel aluminum alloy keel (7) is temporarily fixed to facilitate the division of the insulation board (4) installation area by piece and the distinction of the installation position of the fire isolation zone (8); S4, installation of the external insulation part: first, temporarily fix the insulation board (4), and after adjusting the installation angle and position of the insulation board (4); inject high elastic material glue into the self-locking nail nut groove (2); then, drive the self-locking nail (3) of the insulation board (4); finally, inject glue into the joints of each insulation board (4) to form each insulation board (4) into a whole; S5. Installation of the fireproof isolation belt (8): First, the fireproof isolation belt (8) is paved in the cavity between the angle steel aluminum alloy keels (7), and after paving, the aluminum alloy support strip is placed on the surface; then the π-shaped cap (5) is installed; then glue is injected into the self-locking nail nut groove (2) at the angle steel aluminum alloy keel (7); then, the self-locking nail (3) is driven into the angle steel aluminum alloy keel (7); finally, the core-pulling aluminum rivet (9) is driven into the joint between the angle steel aluminum alloy and the cap plate.

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