Glass curtain wall and insulation board fastening connection method

Abstract

This invention relates to the field of energy-saving construction technology for building curtain walls. Specifically, it relates to a method for fastening and connecting glass curtain walls and insulation boards. The invention first fixes several sets of bidirectional elastic barbs at intervals on the surfaces of the aluminum alloy beams and columns of the curtain wall. Each set consists of two elastic stainless steel sheets fixed at their roots and with their tips opening in opposite directions. Then, a rigid fiber cement board is pre-fixed to the back of the rock wool insulation board as an interface reinforcement layer using a hot-pressing method. Next, the reinforced insulation board is pressed onto the keel, causing the bidirectional elastic barbs to retract under pressure and pierce the interface reinforcement layer. After reaching their position, the barbs elastically reset and open, with their tips forming bidirectional hooks within the fiber cement board matrix for anchoring. This simultaneously constrains the pull-out displacement of the insulation board along the normal direction and the sliding displacement along the tangential direction. This invention eliminates the need to penetrate the insulation board or use adhesives, achieving a quick, heat-bridge-free installation that locks with a single press, thus improving the anchoring reliability and construction efficiency of the insulation board.

Description

Technical Field

[0001] This invention relates to the field of energy-saving construction technology for building curtain walls, and more specifically, to a method for fastening and connecting glass curtain walls and insulation boards. Background Technology

[0002] In the field of glass curtain wall insulation system construction technology, there are three main types of existing fastening connection methods between insulation boards and curtain wall keels: First, the insulation board is directly pasted to the keel surface using adhesive. This method requires a high degree of flatness of the base layer, and the adhesive is prone to aging and weakening of adhesion under long-term temperature changes and ultraviolet radiation, posing a risk of detachment. Second, expansion bolts or self-tapping screws are used to mechanically anchor the insulation board to the keel. This requires drilling holes in the insulation board, which not only weakens the integrity of the insulation board, but also creates significant thermal bridges when the metal screws directly contact the aluminum alloy keel, increasing energy consumption. Additionally, water seepage at the screw holes can easily cause corrosion. Third, clips or pressure plates are used. Pressing the edge of the insulation board requires a complex snap-fit ​​structure, making the installation process cumbersome and demanding extremely strict dimensional accuracy of the insulation board. The existing technologies generally lack a connection method that can provide reliable mechanical anchoring force, avoid thermal bridging effects caused by penetrating connections, and achieve efficient construction. Therefore, how to achieve rapid pressing and long-term stable bidirectional constraint between the insulation board and the curtain wall keel without using additional connectors or damaging the integrity of the insulation board has become a key technical problem that urgently needs to be solved in the current energy-saving construction of glass curtain walls. To address this technical problem, we provide a method for fastening the connection between the glass curtain wall and the insulation board. Summary of the Invention

[0003] The purpose of this invention is to provide a method for fastening a glass curtain wall to an insulation board, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, one objective of this invention is to provide a method for fastening a glass curtain wall to an insulation board, comprising the following steps: S1. On the surface of the aluminum alloy beams and columns of the curtain wall facing the insulation board, several sets of bi-directional elastic barbs are fixed at intervals along the length direction. Each set of bi-directional elastic barbs consists of two elastic stainless steel sheets with their roots fixed to the surface of the keel and their tips opening outward and arranged in opposite directions. In its natural state, it is V-shaped and the tips extend out of the keel surface by a preset length. S2. On the side of the rock wool insulation board that is in contact with the keel surface, corresponding to the position of the barbed strip, a rigid fiber cement board is pre-fixed as an interface reinforcement layer by hot pressing to provide the local bearing strength required for the barbed strip to penetrate. S3. Press the reinforced rock wool insulation board onto the curtain wall keel from the inside out, so that the bi-directional elastic barbs elastically retract and pierce the interface reinforcement layer under the pressing pressure. After being pressed in place, the barbs rely on their own elasticity to reset and open, and their tips form bi-directional barbs anchoring inside the fiber matrix of the fiber cement board, while restraining the insulation board's pull-out displacement along the normal direction and its sliding displacement along the tangential direction.

[0005] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention pre-fixes bidirectional elastic barbs to the curtain wall keel and uses a rigid fiber cement board hot-pressed onto the back of the rock wool insulation board as an interface reinforcement layer. When pressed, the barbs retract and penetrate, and after being in place, they elastically open to form bidirectional barbs within the fiber matrix. This achieves a non-penetrating fastening connection that locks with a single press. This avoids the thermal bridging and water seepage risks caused by traditional bolts penetrating the insulation board, and eliminates the need for additional connectors and adhesives. At the same time, the engagement mechanism between the barbs and the reinforcing fiber simultaneously constrains the pull-out displacement of the insulation board along the normal direction and the sliding displacement along the tangential direction. This solves the problem that conventional adhesive or snap-fit ​​connections cannot withstand bidirectional force and have poor anchoring reliability, thus improving the installation efficiency and long-term stability of the curtain wall insulation system. Attached Figure Description

[0006] Figure 1 This is a flowchart illustrating the overall workflow of the present invention. Detailed Implementation

[0007] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0008] Please see Figure 1 As shown in the figure, this embodiment provides a method for fastening a glass curtain wall to an insulation board, including the following steps: S1. On the surface of the aluminum alloy beams and columns of the curtain wall facing the insulation board, several sets of bi-directional elastic barbs are fixed at intervals along the length direction. Each set of bi-directional elastic barbs consists of two elastic stainless steel sheets with their roots fixed to the surface of the keel and their tips opening outward and arranged in opposite directions. In its natural state, it is V-shaped and the tips extend out of the keel surface by a preset length. S2. On the side of the rock wool insulation board that is in contact with the keel surface, corresponding to the position of the barbed strip, a rigid fiber cement board is pre-fixed as an interface reinforcement layer by hot pressing to provide the local bearing strength required for the barbed strip to penetrate. S3. Press the reinforced rock wool insulation board onto the curtain wall keel from the inside out, so that the bi-directional elastic barbs elastically retract and pierce the interface reinforcement layer under the pressing pressure. After being pressed in place, the barbs rely on their own elasticity to reset and open, and their tips form bi-directional barbs anchoring inside the fiber matrix of the fiber cement board, while restraining the insulation board's pull-out displacement along the normal direction and its sliding displacement along the tangential direction.

[0009] Each elastic stainless steel sheet of the bidirectional elastic barb has a cross-section that is an arc-shaped segment bulging outward from the other sheet in the middle. The arc-shaped segment, the root fixing segment, and the insertion tip segment are integrally formed by continuous cold-pressing plastic deformation, so that when the bidirectional elastic barb is subjected to pressure perpendicular to the keel surface, the arc-shaped segments of the two elastic stainless steel sheets undergo elastic bending deformation toward each other, thus completing the closing.

[0010] The several sets of bidirectional elastic barbs fixed to the surface of the aluminum alloy beams and columns of the curtain wall are achieved by a mounting base pre-set on the surface of the keel. The mounting base has a concave groove, the contour of which matches the shape of the root of the bidirectional elastic barb. During installation, the root of the bidirectional elastic barb is embedded in the groove, and then a micro-forging process perpendicular to the surface of the keel is used to cause the keel material at the groove opening to plastically flow and cover and press the root of the bidirectional elastic barb, thus completing the anchoring of the bidirectional elastic barb on the keel.

[0011] The tip extends a predetermined length beyond the keel surface, specifically: The thickness of the rock wool insulation board in its natural state and its compressed thickness under the design clamping force are measured. The extension length of the bi-directional elastic barb is made greater than the compressed thickness of the insulation board under the design clamping force by a difference. The difference is equal to the sum of the depth of the bi-directional elastic barb penetrating the interface reinforcement layer and the space depth required for the barb tip to fully open within the reinforcement layer. Finally, based on the calculated extension length value, the cutting length of the elastic stainless steel sheet from the root to the tip is controlled during the manufacturing of the bi-directional elastic barb.

[0012] Alkali-resistant glass fiber mesh impregnated with inorganic cementitious slurry is alternately laid with dry powdered fiber cementitious material. During laying, the mesh is placed in the middle layer and hot-pressed and cured in a hot-press template. Temperature and pressure are controlled during the hot-pressing process so that the fiber cementitious material wraps around the mesh after melting and flowing and then re-cures, forming a composite board with the mesh as the reinforcing skeleton and the fiber cementitious material as the matrix. The hardness of the composite board decreases in a gradient from the outer surface to the inner surface in contact with the rock wool.

[0013] Using a roller pressing device equipped with temperature and pressure sensors, the surface of the rigid fiber cement board is first preheated. Then, the side with the mesh fabric skeleton faces the rock wool insulation board. The roller pressing device rolls the preheated fiber cement board onto the surface of the rock wool at a constant speed and pressure. The heat and pressure of the roller pressing cause the surface fiber of the rock wool insulation board to partially melt and interweave with the gradient structure layer on the inner surface of the fiber cement board. After cooling, an interface reinforcement layer is formed on the rock wool insulation board.

[0014] The process of pressing the reinforced rock wool insulation board onto the curtain wall keel from the inside out is specifically performed by a robotic arm equipped with a pressure feedback control system. The end of the robotic arm is equipped with a pressure plate that matches the size of the insulation board. The pressure plate has clearance holes corresponding to the positions of the bi-directional elastic barbs. During pressing, the robotic arm drives the pressure plate to push the insulation board toward the keel. The pressure feedback control system monitors the reaction force borne by the pressure plate in real time. When the reaction force reaches the threshold corresponding to the design clamping force of the rock wool insulation board, the robotic arm maintains the pressure state for a preset time. During this process, the tips of the bi-directional barbs pierce the surface layer of the insulation board in sequence and penetrate into the interface reinforcement layer until the back of the insulation board is attached to the surface of the keel.

[0015] After being pressed into place, the working robotic arm retracts the pressure plate, and the bidirectional elastic barb pieces rely on their own elasticity to reset and open inside the interface reinforcement layer of the rigid fiber cement board. At this time, an endoscope inspection device is used to collect images of the opening state of the barb tips in the reinforcement layer through the reserved observation hole from the outside of the insulation board. The collected images are then compared with the image template of the standard opening state to confirm whether the barb pieces have formed an effective bidirectional barb anchoring.

[0016] When image comparison reveals that the opening angle of a certain barb is not at the preset angle, a point pressure compensation tool is used for correction. The point pressure compensation tool has a guide sleeve that can be fitted on the outside of the barb and a miniature pressure head located inside the sleeve. The guide sleeve is aligned with the location of the barb, and the miniature pressure head is driven to apply a supplementary pressure perpendicular to the plate surface to the insulation board and interface reinforcement layer around the barb. The supplementary pressure causes the fiber cement-based material of the interface reinforcement layer to flow, which is used to wrap the barb and make the barb open further.

[0017] After all the barbs are effectively anchored and pass inspection, the glass curtain wall and the insulation board are firmly connected. At this time, the bidirectional elastic barbs, through the bidirectional hooks formed by their tips in the fiber matrix of the rigid fiber cement board, constrain the pull-out displacement of the insulation board along the normal direction. At the same time, the firm connection between the root of the barb and the keel mounting base, as well as the mutual meshing between the open part of the barb and the reinforcing layer fiber, jointly constrain the sliding displacement of the insulation board along the tangential direction.

[0018] Further explanation is needed regarding the bidirectional elastic barbs. They employ a one-piece molded arc-shaped cross-section elastic structure design, enhancing the stability of the barbs' retraction and repositioning. This ensures the barbs deform smoothly during pressing and reliably open after insertion, providing a stable anchoring foundation for the secure connection between the glass curtain wall and the insulation board. Each set of bidirectional elastic barbs comprises two elastic stainless steel sheets. The roots of the two sheets are connected and fixed to the surface of the curtain wall keel. The tips of the two sheets open outwards and are arranged in a back-to-back manner, naturally forming a V-shape. Each elastic stainless steel sheet has an arc-shaped section at its cross-section perpendicular to its length, bulging outwards from the other sheet. This arc-shaped section is the elastic... The structural component of the elastic stainless steel sheet enables flexible deformation. The elastic stainless steel sheet comprises a root fixing section and an inserting tip section. The root fixing section is the end area where the elastic stainless steel sheet is fixedly connected to the curtain wall keel. The inserting tip section is the end area where the elastic stainless steel sheet penetrates the interface reinforcement layer of the rigid fiber cement board, forming a bidirectional barb. The curved section is not connected to the root fixing section or the inserting tip section by welding or splicing, but rather integrally formed through a continuous cold-pressing plastic deformation process. This cold-pressing plastic deformation process is performed in a dedicated precision cold-pressing mold. The mold has a cavity structure that perfectly matches the contours of the root fixing section, the curved section, and the inserting tip section. After the flat stainless steel sheet is fed into the mold cavity, the mold applies constant pressure... The material is applied perpendicularly to the surface of the stainless steel sheet, causing continuous plastic deformation along the cavity contour. This sequentially forms the root fixing section, the arc section, and the piercing tip section. During the forming process, the internal crystal structure of the stainless steel sheet remains continuous, without fractures or delamination defects, ensuring the overall structural integrity and elastic recovery capability of the elastic stainless steel sheet. When the bidirectional elastic barbs are subjected to pressure perpendicular to the curtain wall keel surface, the pressure directly acts on the outward bulging positions of the arc sections of the two elastic stainless steel sheets. Under the pressure, the two arc sections overcome their own elastic stress, producing elastic bending deformation in opposite directions. During this elastic bending deformation, the outward bulging amplitude of the arc sections gradually decreases, and the opening angle between the two elastic stainless steel sheets continuously shrinks, resulting in an overall shape... The two elastic stainless steel sheets gradually transform from a natural V-shape to a nearly straight, contracted shape. The piercing tips of the two elastic stainless steel sheets approach each other, completing the contraction of the bidirectional elastic barbs. After contraction, the overall space occupied by the bidirectional elastic barbs is reduced, allowing them to easily pass through the rock wool insulation board and penetrate the interface reinforcement layer of the rigid fiber cement board. After the pressure is released, the arc-shaped segment automatically resets due to its stored elastic potential energy, causing the two elastic stainless steel sheets to open outwards again, restoring the natural V-shape. The piercing tips form a bidirectional barb structure within the interface reinforcement layer, achieving anchoring and constraint of the insulation board. The outward bulge height of the arc-shaped segment of a single elastic stainless steel sheet is three millimeters. When subjected to a pressure of fifty Newtons per square centimeter, the arc-shaped segment bends inwards by two millimeters.The two elastic stainless steel sheets retract from their natural 60-degree opening angle to 15 degrees, meeting the space requirements for insertion into the reinforcing layer. After removal under pressure, the arc-shaped segment quickly resets, restoring the opening angle to 60 degrees, completing the bidirectional barb anchoring. This one-piece molded arc-shaped structure ensures stable and controllable retraction and reset of the bidirectional elastic barbs, eliminating jamming or elastic failure issues, and providing reliable structural support for subsequent insertion, anchoring, and displacement restraint.

[0019] The bidirectional elastic barbs on the surfaces of the aluminum alloy beams and columns of the curtain wall are fixed using pre-set mounting bases and micro-forging anchoring, which improves the tightness of the connection between the barb root and the keel, eliminates the loosening risks caused by bolt or welded connections, and ensures the anchoring stability of the bidirectional elastic barbs under long-term loads. The surfaces of the aluminum alloy beams and columns facing the insulation board are pre-machined with mounting bases corresponding to the installation positions of the bidirectional elastic barbs. The mounting bases are integrally formed fixing structures of the keel body. Each mounting base has a recessed groove inside, and the outline dimensions of the groove perfectly match the outer dimensions of the root of the bidirectional elastic barb. The depth, width, and length of the groove are all... Based on the corresponding parameter settings of the bidirectional elastic barb root, ensure that the bidirectional elastic barb root can be completely embedded in the slot without radial gap. When performing the bidirectional elastic barb installation operation, align the root of the bidirectional elastic barb with the slot opening of the mounting base, and smoothly push the root into the slot along a direction parallel to the length of the keel, so that the bottom surface of the bidirectional elastic barb root is completely in contact with the bottom surface of the slot, and the two side surfaces of the bidirectional elastic barb root are completely in contact with the two side inner walls of the slot. This completes the positioning and initial placement of the bidirectional elastic barb root. After positioning, use a special micro-forging press to perform a micro-forging process perpendicular to the keel surface. The forging head end face of the micro-forging press... The forging head has a planar structure, and its effective area completely covers the keel material at the slot opening. The forging head applies a constant forging pressure perpendicular to the keel surface. Under this pressure, the aluminum alloy keel material at the slot opening undergoes directional plastic flow. This plastically flowing material extends into the slot and gradually wraps around the upper surface and edge of the bidirectional elastic barb root. Forging pressure is continuously applied until the keel material at the slot opening completely covers and presses against the bidirectional elastic barb root, creating a unified anchoring structure with no relative displacement between the bidirectional elastic barb root and the keel mounting base. All sets of bidirectional elastic barbs are fixed sequentially according to the above installation positioning and micro-forging wrapping process. At the pre-installed base positions on the aluminum alloy beams and columns of the curtain wall, the root of the fixed bidirectional elastic barb can withstand the normal pull-out load and tangential sliding load of the insulation board, providing a solid root support for the subsequent insertion of the bidirectional elastic barb into the interface reinforcement layer and the formation of bidirectional barb anchoring. For example, the slot width is set to eight millimeters, and the root width of the bidirectional elastic barb is also eight millimeters. The forging pressure applied in the micro-forging process is 300 Newtons per square centimeter. After the aluminum alloy keel material plastically flows, it covers a two-millimeter-thick area at the root of the bidirectional elastic barb. The overall anchoring structure can withstand a pull-out force of more than 5,000 Newtons per square meter, meeting the strength requirements for long-term fastening of the glass curtain wall insulation board.

[0020] The preset length of the bidirectional elastic barbs extending beyond the keel surface is determined using a precise calculation method based on the compression characteristics of the insulation board and the anchoring space requirements. This ensures that the barbs can smoothly penetrate the compressed rock wool insulation board and achieve effective anchoring within the interface reinforcement layer, avoiding penetration failure due to insufficient extension length or structural interference due to excessive length. This provides matching dimensional support for the tight connection between the glass curtain wall and the insulation board. First, a digital thickness measurement tool is used to perform multi-point thickness data acquisition on the same batch of rock wool insulation boards. The thickness of the rock wool insulation board is measured under natural conditions without external load. Then, the rock wool insulation board is placed on a standard pressure testing device, and the design clamping force set by the curtain wall construction process is applied. The pressure is maintained in a stable state until the rock wool insulation board is compressed and solidified. After determination, the compressed thickness of the rock wool insulation board under the designed clamping force was measured, completing the collection and recording of two types of basic thickness parameters. Subsequently, the core calculation process of the extension length of the bidirectional elastic barbs was executed. The calculation rule was set so that the extension length of the bidirectional elastic barbs must be greater than the compressed thickness of the rock wool insulation board under the designed clamping force, forming a fixed dimensional difference. The specific value of this difference is obtained by adding two parts of parameters. The first part is the effective depth of the bidirectional elastic barbs penetrating the interface reinforcement layer of the rigid fiber cement board. The second part is the spatial depth required for the tip of the barb to return from the retracted state to the fully extended state inside the interface reinforcement layer. The effective penetration depth value and the fully extended spatial depth value are then arithmetically added together. After obtaining the final difference value, the calculated difference value is added to the compressed thickness of the rock wool insulation board under the designed clamping force to obtain the precise extension length required for the bidirectional elastic barb. This calculated extension length is then used as the core dimension for the production and processing of the bidirectional elastic barb. In the manufacturing process of the elastic stainless steel sheet, precision CNC laser cutting equipment is used to control the cutting length from the end of the root fixing section to the top of the piercing tip section, according to the calculated extension length value. This ensures that the length of the cut elastic stainless steel sheet perfectly matches the extension length value, guaranteeing that the tip of the bidirectional elastic barb extends beyond the keel surface to meet the preset requirements, such as in its natural state. The rock wool insulation board is 50 mm thick, and the compressed thickness under the design pressure is 40 mm. The effective depth of the bidirectional elastic barbs penetrating the interface reinforcement layer is 6 mm, and the space depth required for the barb tips to fully open is 4 mm. The difference between the two is 10 mm. The final calculated extension length of the bidirectional elastic barbs is 50 mm. When laser cutting, the cutting length of the elastic stainless steel sheet is set to 50 mm, which meets the usage requirements. All calculations and processing are carried out according to the measured parameters and process standards, with no subjective dimensional deviations. This ensures that the extension length of the bidirectional elastic barbs is completely matched with the compression characteristics of the rock wool insulation board and the anchoring space requirements of the interface reinforcement layer, providing a stable dimensional guarantee for subsequent pressing and retraction, elastic reset and opening, and bidirectional barb anchoring.

[0021] The rigid fiber cement composite board is manufactured using an alternating laying and gradient hot-pressing curing process, forming a gradient hardness structure with a hard exterior and a soft interior. This structure not only meets the local bearing strength required for the insertion of bidirectional elastic barbs but also forms a tight bond with rock wool insulation boards, improving the overall compatibility and anchoring reliability of the interface reinforcement layer. During manufacturing, the alkali-resistant fiberglass mesh is first impregnated by completely immersing it in a pre-mixed inorganic cementitious slurry, ensuring the fiber gaps within the mesh are fully filled. After impregnation, the mesh is removed and excess inorganic cementitious slurry is drained, resulting in the impregnated alkali-resistant fiberglass mesh. Simultaneously, dry powder fiber cementitious material is prepared according to the process specifications. The cement-based material is formed by uniformly mixing cement mineral fibers and filler powder. The paving operation is performed inside a dedicated hot-press template. First, a first layer of dry powdered fiber cement-based material is evenly laid on the lower surface of the hot-press template, with the thickness following the process settings. Then, an impregnated alkali-resistant fiberglass mesh is laid flat on the upper surface of the first layer, ensuring the mesh is wrinkle-free, shift-free, and completely covers the paving area. Next, a second layer of dry powdered fiber cement-based material is evenly laid on the upper surface of the alkali-resistant fiberglass mesh, completely encasing the mesh between the two layers, forming an alternating paving structure with the mesh in the middle layer. After paving, the hot-press template is closed, and the hot-press curing process is initiated. The hot-pressing process utilizes built-in temperature and pressure control components to stably regulate the hot-pressing temperature and pressure in real time. The hot-pressing temperature is set to a fixed value that allows the dry powder fiber cementitious material to melt and flow, while the hot-pressing pressure is set to a fixed value that ensures the material is uniformly dense. Under the set temperature, the dry powder fiber cementitious material transforms from a dry powder state to a molten and flowing state. The flowing fiber cementitious material completely encapsulates the fiber bundles of the alkali-resistant glass fiber mesh and fills all the gaps in the mesh. The hot-pressing temperature and pressure are maintained until the molten fiber cementitious material completely re-solidifies and forms a rigid fiber cement composite board with the alkali-resistant glass fiber mesh as the internal reinforcing skeleton and the fiber cementitious material as the external matrix. During the hot-pressing process, the material is positioned near the top and bottom of the hot-pressing template. The surface fiber cement-based material withstands temperature and pressure more fully, and the material density changes layer by layer. This results in a gradient decrease in the hardness of the composite board surface from the outer surface towards the inner surface in contact with the rock wool insulation board. The high-hardness outer area can withstand the localized pressure of the bi-directional elastic barbs penetrating, preventing the interface reinforcement layer from cracking. The gradient softening area on the inner side can interweave and bond with the surface fibers of the rock wool insulation board. For example, if the hot-pressing temperature is set at 180 degrees Celsius, the hot-pressing pressure is set at 20 Newtons per square centimeter, the thickness of both layers of dry powder fiber cement-based material is 3 mm, and the thickness of the alkali-resistant glass fiber mesh in the middle is 1 mm, the final composite board has a total thickness of 7 mm. The outer surface of the composite board meets the pressure-bearing requirements for the barbs penetrating.The inner surface hardness gradually decreases, adapting to the roll-pressing process of rock wool insulation boards. This gradient hardness structure, combined with the mesh reinforcement design, significantly improves the structural stability and anchoring compatibility of the interface reinforcement layer, providing reliable interface support for the bidirectional elastic barbs to form bidirectional hook anchoring.

[0022] Roller pressing equipment equipped with temperature and pressure sensors is used to complete the roll-pressing bonding of rigid fiber cement board and rock wool insulation board. This achieves a seamless interweaving and bonding of the two materials, forming a stable interface reinforcement layer on the surface of the rock wool insulation board. This provides a reliable pressure-bearing interface for the bidirectional elastic barbs to penetrate and anchor, avoiding delamination or detachment at the bonding interface. During the bonding operation, a dedicated roller pressing equipment integrating temperature and pressure sensors is first activated. The temperature sensor collects and reports the preheating temperature of the board surface and the roller pressing operation temperature in real time, while the pressure sensor monitors and adjusts the roller pressure applied by the pressure roller in real time. The heat-cured rigid fiber cement board is first placed on the preheating platform of the roller pressing equipment. The preheating platform's built-in electric heating element heats the entire rigid fiber cement board... The surface of the rigid fiber cement board undergoes uniform preheating. Temperature sensors continuously collect surface temperature data and transmit it to the equipment control system until the surface temperature reaches the preheating temperature set in the process. After preheating, the rigid fiber cement board is transferred to the roller pressing station. The placement of the rigid fiber cement board is adjusted so that the side surface containing the alkali-resistant glass fiber mesh skeleton is precisely aligned with the surface of the rock wool insulation board that needs to be bonded to the interface reinforcement layer. The rock wool insulation board is then stably fixed on the horizontal conveyor base of the roller pressing equipment. The drive motor of the roller pressing equipment is started, driving the pressure roller to move uniformly along the length of the rock wool insulation board at a constant speed preset in the process. At the same time, pressure sensors collect the contact pressure between the pressure roller and the rigid fiber cement board in real time, and transmit the data through the equipment control system. Closed-loop regulation ensures the pressure rollers maintain a constant pressure value preset in the process, uniformly pressing the preheated rigid fiber cement board onto the designated surface of the rock wool insulation board. During the rolling process, the preheated heat carried by the rigid fiber cement board, combined with the constant pressure applied by the rollers, acts on the surface fibers of the rock wool insulation board, causing localized melting of the surface fibers. The molten rock wool fibers fully contact the gradient structure layer on the inner surface of the rigid fiber cement board, forming an interlocking bond. The decreasing hardness of the gradient structure layer from the outside to the inside ensures a seamless interface. After the rolling operation is completed, the rock wool insulation board and rigid fiber cement board assembly is moved to a room-temperature resting area for natural cooling. During the cooling process, the locally molten rock wool fibers gradually return to a solidified state. An irreversible, integral bond is formed between the rock wool insulation board and the gradient structure layer on the inner surface of the rigid fiber cement board. After cooling, a complete and robust interface reinforcement layer is formed on the side of the rock wool insulation board that is bonded to the curtain wall keel. The high-hardness area on the outer side of the interface reinforcement layer can withstand the local pressure when the bidirectional elastic barbs penetrate. The inner side is seamlessly bonded to the rock wool insulation board. For example, the preheating temperature of the roller pressing equipment is set to 120 degrees Celsius, the roller pressing speed is set to 2 meters per minute, the roller pressing pressure is set to 15 Newtons per square centimeter, and the fiber melting depth of the surface layer of the rock wool insulation board is 0.5 millimeters. After interweaving and bonding with the gradient layer of the rigid fiber cement board, there is no delamination or displacement. The roller pressing parameters are monitored and controlled in real time by temperature and pressure sensors to ensure the bonding quality and dimensional accuracy of the interface reinforcement layer are stable.This provides standardized interface support for the subsequent pressing of rock wool insulation boards onto the curtain wall joists and the insertion and anchoring of bi-directional elastic barbed strips.

[0023] A robotic arm equipped with a pressure feedback control system is used to complete the pressing and bonding operation of reinforced rock wool insulation boards. This allows for precise closed-loop control of the pressing pressure and stable maintenance of the bonding state, ensuring that the bi-directional elastic barbs smoothly penetrate the interface reinforcement layer. This guarantees the bonding accuracy between the rock wool insulation board and the curtain wall keel, improving the standardization of the construction process for the fastening connection between the glass curtain wall and the insulation board. The entire operation of pressing the rock wool insulation board with the interface reinforcement layer onto the curtain wall keel from the inside out is performed by the robotic arm equipped with a pressure feedback control system. The robotic arm is an automated construction device with multi-degree-of-freedom precise positioning and constant force output capabilities. A pressure plate with dimensions perfectly matching the overall size of the rock wool insulation board is installed at the end of the robotic arm. The surface of the pressure plate can... The pressure plate fully covers the entire area of ​​the rock wool insulation board that needs to withstand the pressing pressure. The surface of the pressure plate is pre-machined with clearance holes corresponding to the positions of the bi-directional elastic barbs on the curtain wall aluminum alloy beams and columns, based on the actual arrangement of the barbs. The center coordinates of the clearance holes perfectly coincide with the installation coordinates of the bi-directional elastic barbs on the keel. The internal diameter of the clearance holes is larger than the maximum external dimension of the bi-directional elastic barbs in their naturally open state. During the pressing operation, the robotic arm drives the end pressure plate to move according to the preset positioning path. The pressure plate directly contacts the side of the rock wool insulation board away from the keel and smoothly propels the rock wool insulation board towards the curtain wall keel, maintaining a straight line perpendicular to the surface of the curtain wall keel. The pressure feedback control system controls the pressure plate internally. The integrated pressure sensing component collects the reaction force transmitted by the rock wool insulation board to the pressure plate in real time. The pressure sensing component transmits the continuous real-time reaction force signal to the core computing unit of the pressure feedback control system. The computing unit continuously compares the real-time reaction force value with the pre-entered threshold value of the corresponding design clamping force of the rock wool insulation board. The design clamping force threshold is a fixed pressure value determined based on the compression performance parameters of the rock wool insulation board and the requirements of the curtain wall construction process. When the pressure feedback control system determines that the real-time reaction force value has reached the design clamping force threshold, it immediately sends a constant pressure holding control signal to the working robotic arm. After receiving the signal, the working robotic arm stops its axial feed action and continuously outputs stable pressure. The duration of pressure holding is preset by the construction process. The fixed time, preset in length, meets the time requirements for the bidirectional elastic barbs to complete their retraction, deformation, and insertion actions. Throughout the pressure maintenance period, the bidirectional elastic barbs fixed to the surface of the curtain wall keel are continuously subjected to pressure. The two elastic stainless steel sheets of the bidirectional elastic barbs elastically retract towards each other, and the tips of the bidirectional elastic barbs sequentially penetrate the surface of the rock wool insulation board and pierce into the interface reinforcement layer composed of rigid fiber cement board. Under constant pressure, the rock wool insulation board is gradually compressed to the compression thickness corresponding to the designed clamping force, until the back of the rock wool insulation board with the interface reinforcement layer is completely bonded to the surface of the curtain wall keel, without any local gaps or suspended areas. For example, the end plate of the robotic arm has dimensions of 600 mm x 1200 mm.Twenty clearance holes are cut into the pressure plate, their positions perfectly corresponding to twenty sets of bidirectional elastic barbs on the keel. The designed clamping force threshold is set at 5,000 Newtons per square meter, and the preset pressure holding time is 10 seconds. Once the pressure feedback control system detects that the reaction force has reached the target, it controls the robotic arm to maintain constant pressure. The bidirectional elastic barbs smoothly retract and penetrate the interface reinforcement layer, and the rock wool insulation board completely adheres to the keel surface. The entire pressing action is completed collaboratively by the working robotic arm and the pressure feedback control system, eliminating pressure fluctuations or positioning deviations caused by manual operation. This ensures that the insertion position and depth of the bidirectional elastic barbs meet the anchoring requirements, providing a stable structural foundation for the subsequent repositioning and opening of the bidirectional elastic barbs to form a bidirectional barb anchoring.

[0024] The endoscopic inspection device performs visual image verification of the opening state of the bidirectional elastic barbs, which can objectively determine the forming effect of the bidirectional barb anchoring, avoid the subjective errors caused by manual inspection, and ensure that the anchoring quality of the glass curtain wall and insulation board is quantifiable and traceable throughout the entire process. After the working robotic arm completes the pressing operation of the rock wool insulation board and confirms that the back of the insulation board is completely attached to the surface of the curtain wall keel, it immediately performs the pressure plate withdrawal operation. The pressure plate is smoothly withdrawn along a reverse path perpendicular to the surface of the keel, and no longer applies any pressing pressure to the rock wool insulation board. After losing the external pressing pressure constraint, the bidirectional elastic barbs automatically reset and open within the interface reinforcement layer composed of rigid fiber cement board, relying on the elastic potential energy stored in the elastic stainless steel sheet itself. The two elastic stainless steel sheets return to their natural V-shape from their retracted state, their tips forming a bidirectional barb structure within the fiber matrix of the interface reinforcement layer. During the prefabrication stage, the rock wool insulation board is pre-processed with observation holes connecting the rock wool insulation board and the interface reinforcement layer, corresponding to the installation positions of each set of bidirectional elastic barbs on the curtain wall keel. The aperture of the observation hole matches the outer diameter of the miniature camera probe of the endoscope inspection device. The endoscope inspection device integrates a miniature camera probe, a ring-shaped supplementary light source, an image transmission line, and an intelligent image comparison module. During the inspection operation, the operator smoothly inserts the miniature camera probe of the endoscope inspection device through the observation hole on the outside of the rock wool insulation board. The ring-shaped supplementary light source at the tip of the probe illuminates the interface reinforcement layer. The tip region of the bidirectional elastic barb emits uniform light, eliminating the influence of internal shadows on imaging. A miniature camera probe, with a fixed focal length, captures high-definition images of the actual opening shape of the bidirectional elastic barb tip. The captured content includes the barb opening angle, tip distribution position, and engagement state with the interface reinforcement layer fiber matrix. The image transmission line synchronously transmits the real-time acquired image signal to the image intelligent comparison module. The image intelligent comparison module's storage unit pre-stores a standard opening state image template. The standard opening state image template is a standard image of the bidirectional elastic barb fully reset and opened, forming an effective bidirectional barb anchoring. The template is marked with core features such as the standard opening angle, tip spacing, and effective engagement area. The image intelligent comparison module performs pixel-by-pixel feature comparison between the real-time acquired actual image and the standard open state image template. The comparison process focuses on identifying whether the barb opening angle reaches the preset standard, whether the tip is fully embedded in the fiber matrix, and whether there is any shrinkage or jamming. For example, if the standard open state barb opening angle is 60 degrees, and the image comparison module determines that the difference between the actual opening angle and the standard angle is less than 5 degrees, it is considered that the group of bidirectional elastic barbs has formed an effective bidirectional barb anchor. By performing image acquisition and template comparison on all bidirectional elastic barbs one by one, the anchoring and forming status of all bidirectional elastic barbs can be completely confirmed, providing an objective and visual test basis for subsequent local pressure correction and overall connection acceptance.

[0025] The point-compression tool performs precise local compression correction for bidirectional elastic barbs whose opening angle does not meet the standard. It can drive the directional flow of the interface reinforcement layer material and assist the barbs to fully open, eliminating the risk of anchoring failure of a single group of barbs and ensuring that all bidirectional elastic barbs form effective bidirectional barb anchoring. After the endoscope detection device completes intelligent image comparison, if it determines that the actual opening angle of a certain group of bidirectional elastic barbs does not reach the preset standard opening angle value, it immediately initiates the local correction process at the corresponding position. The correction operation is performed using a dedicated point-compression tool, which includes two core execution components: a guide sleeve and a micro-pressure head. The guide sleeve is a hollow cylindrical structure with an internal diameter larger than the maximum external size of the bidirectional elastic barb in its naturally opened state. The micro-pressure head is installed... At the center of the guide sleeve, the micro-pressure head can move directionally and axially along the guide sleeve. During the correction operation, first align the guide sleeve of the point-compression tool with the corresponding position of the bi-directional elastic barb with insufficient opening angle, ensuring the guide sleeve is smoothly fitted onto the surface area of ​​the rock wool insulation board outside the bi-directional elastic barb. The guide sleeve serves to fix and radially limit the position, preventing tool displacement during the compression process from affecting the correction effect. After positioning, activate the electric drive assembly of the point-compression tool. The drive assembly drives the internal micro-pressure head to move axially in a direction perpendicular to the board surface. The micro-pressure head applies a constant supplementary pressure to a localized area of ​​the rock wool insulation board and rigid fiber cement board interface reinforcement layer around the bi-directional elastic barb. The supplementary pressure value is the pre-set value. Based on a fixed value set according to the material properties of the interface reinforcement layer, this pressure can induce localized plastic flow of the fiber cement-based material inside the interface reinforcement layer without causing compression damage to the rock wool insulation board. Under the supplementary pressure, the fiber cement-based material flows directionally towards the periphery of the bidirectional elastic barbs. The flowing fiber cement-based material gradually wraps around the root and arc-shaped section of the elastic stainless steel sheet of the bidirectional elastic barbs. The lateral force generated by the material flow acts on the surface of the elastic stainless steel sheet, and together with the elastic potential energy of the elastic stainless steel sheet itself, it pushes the tip of the bidirectional elastic barbs to open further outward until the actual opening angle reaches the preset standard angle. For example, if the preset standard opening angle is sixty degrees, the actual opening angle of a certain set of bidirectional elastic barbs is only... At 35 degrees, after the guide sleeve is positioned, the micro-pressure head applies an additional pressure of 30 Newtons per square centimeter. The fiber cement-based material flows locally, wrapping around the barbs and pushing them to gradually open to 60 degrees, meeting the angle requirements for effective anchoring. After the pressure correction is completed, the micro-pressure head and guide sleeve are withdrawn sequentially. An endoscope is then inserted through the observation hole to acquire a second image of the opening state of this group of bidirectional elastic barbs. The acquired image is then compared pixel-by-pixel with the standard opening state image template. Once the actual opening angle is confirmed to meet the preset standard, this local correction operation is completed. The entire correction process only targets a single problematic barb, without interfering with the anchoring state of other qualified bidirectional elastic barbs, precisely resolving the problem of insufficient opening angle.Ensure that all bi-directional elastic barbs on the curtain wall keel form a stable bi-directional barb anchorage, providing complete and reliable anchoring support for the tight connection between the glass curtain wall and the insulation board.

[0026] After all bidirectional elastic barbs are effectively anchored and verified by an endoscopic inspection device, a permanent and secure connection is formed between the glass curtain wall and the rock wool insulation board. This connection method utilizes a dual constraint mechanism of bidirectional barb anchoring and structural engagement to simultaneously limit the normal pull-out and tangential slippage of the insulation board, thereby improving the overall stability and long-term reliability of the glass curtain wall insulation system. Once all sets of bidirectional elastic barbs have been reset and opened, and the preset opening angle has been confirmed by endoscopic image comparison, any barbs with insufficient opening angles are corrected using a point-compression tool and pass a second inspection. After all anchoring points meet the effective bidirectional barb forming standard, the glass curtain wall... The keel structure composed of aluminum alloy beams and columns forms a complete and stable fastened connection with the rock wool insulation board, which has a pre-installed rigid fiber cement board interface reinforcement layer. At this point, the tips of the bidirectional elastic barbs form a fixed bidirectional barb structure within the fiber matrix of the rigid fiber cement board interface reinforcement layer. The extension direction of the bidirectional barb structure is perpendicular to the direction of the normal pull-out force that the insulation board may experience. When the rock wool insulation board is subjected to a normal pull-out force perpendicular to the board surface, the bidirectional barbs and the fiber matrix inside the interface reinforcement layer form a tight mechanical interlock, directly preventing the rock wool insulation board from undergoing pull-out displacement along the normal direction. Simultaneously, the bidirectional... The root region of the elastic barb is firmly bonded to the pre-set mounting base on the keel surface through a pre-processed micro-forging process, forming a non-displaceable structure. The elastic stainless steel sheet portion of the bi-directional elastic barb, after being reset and opened, forms an interlocking engagement with the fiber material and inorganic cementitious matrix within the interface reinforcement layer of the rigid fiber cement board. When the rock wool insulation board is subjected to a tangential sliding force parallel to the board surface, the anchoring structure between the root of the bi-directional elastic barb and the mounting base directly bears the tangential load. The open portion of the bi-directional elastic barb synchronously transmits and counteracts the tangential force with the interlocking structure of the interface reinforcement layer fibers. The root anchoring structure and the surface interlocking structure... The constraint structure works in concert to prevent the rock wool insulation board from slipping in the tangential direction. A single set of bidirectional elastic barbs can withstand a normal pull-out force of 5,000 N / m² and a tangential slip force of 3,000 N / m². Multiple sets of bidirectional elastic barbs arranged at intervals along the length of the curtain wall keel surface form a uniform constraint system throughout the entire area. The entire connection is fastened without the need for additional adhesive materials or mechanical bolts. It achieves a fastening connection without additional parts by relying solely on the elastic structural characteristics of the bidirectional elastic barbs themselves and the pressure-bearing engagement characteristics of the interface reinforcement layer. The force transmission path is clear and the constraint effect is stable, meeting the structural safety standards and long-term performance requirements of building glass curtain wall insulation systems.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for fastening a glass curtain wall to an insulation board, the method comprising: Includes the following steps: ​ S1. On the surface of the aluminum alloy beams and columns of the curtain wall facing the insulation board, several sets of bi-directional elastic barbs are fixed at intervals along the length direction. Each set of bi-directional elastic barbs consists of two elastic stainless steel sheets with their roots fixed to the surface of the keel and their tips opening outward and arranged in opposite directions. In its natural state, it is V-shaped and the tips extend out of the keel surface by a preset length. S2. On the side of the rock wool insulation board that is in contact with the keel surface, corresponding to the position of the barbed strip, a rigid fiber cement board is pre-fixed as an interface reinforcement layer by hot pressing to provide the local bearing strength required for the barbed strip to penetrate. S3. Press the reinforced rock wool insulation board onto the curtain wall keel from the inside out, so that the bi-directional elastic barbs elastically retract and pierce the interface reinforcement layer under the pressing pressure. After being pressed in place, the barbs rely on their own elasticity to reset and open, and their tips form bi-directional barbs anchoring inside the fiber matrix of the fiber cement board, while restraining the insulation board's pull-out displacement along the normal direction and its sliding displacement along the tangential direction.

2. The method for fastening connection of glass curtain wall and insulation board according to claim 1, characterized in that: Each elastic stainless steel sheet of the bidirectional elastic barb has a cross-section that is an arc-shaped segment bulging outward from the other sheet in the middle. The arc-shaped segment, the root fixing segment, and the insertion tip segment are integrally formed by continuous cold-pressing plastic deformation, so that when the bidirectional elastic barb is subjected to pressure perpendicular to the keel surface, the arc-shaped segments of the two elastic stainless steel sheets undergo elastic bending deformation toward each other, thus completing the closing.

3. The method for fastening connection of glass curtain wall and insulation board according to claim 2, characterized in that: The several sets of bidirectional elastic barbs fixed to the surface of the aluminum alloy beams and columns of the curtain wall are achieved by a mounting base pre-set on the surface of the keel. The mounting base has a concave groove, the contour of which matches the shape of the root of the bidirectional elastic barb. During installation, the root of the bidirectional elastic barb is embedded in the groove, and then a micro-forging process perpendicular to the surface of the keel is used to cause the keel material at the groove opening to plastically flow and cover and press the root of the bidirectional elastic barb, thus completing the anchoring of the bidirectional elastic barb on the keel.

4. The method for fastening connection of glass curtain wall and insulation board according to claim 3, characterized in that: The tip extends a predetermined length beyond the keel surface, specifically: The thickness of the rock wool insulation board in its natural state and its compressed thickness under the design clamping force are measured. The extension length of the bi-directional elastic barb is made greater than the compressed thickness of the insulation board under the design clamping force by a difference. The difference is equal to the sum of the depth of the bi-directional elastic barb penetrating the interface reinforcement layer and the space depth required for the barb tip to fully open within the reinforcement layer. Finally, based on the calculated extension length value, the cutting length of the elastic stainless steel sheet from the root to the tip is controlled during the manufacturing of the bi-directional elastic barb.

5. The method for fastening connection of glass curtain wall and insulation board according to claim 1, characterized in that: Alkali-resistant glass fiber mesh impregnated with inorganic cementitious slurry is alternately laid with dry powdered fiber cementitious material. During laying, the mesh is placed in the middle layer and hot-pressed and cured in a hot-press template. Temperature and pressure are controlled during the hot-pressing process so that the fiber cementitious material wraps around the mesh after melting and flowing and then re-cures, forming a composite board with the mesh as the reinforcing skeleton and the fiber cementitious material as the matrix. The hardness of the composite board decreases in a gradient from the outer surface to the inner surface in contact with the rock wool.

6. The method for fastening connection of glass curtain wall and insulation board according to claim 5, characterized in that: Using a roller pressing device equipped with temperature and pressure sensors, the surface of the rigid fiber cement board is first preheated. Then, the side with the mesh fabric skeleton faces the rock wool insulation board. The roller pressing device rolls the preheated fiber cement board onto the surface of the rock wool at a constant speed and pressure. The heat and pressure of the roller pressing cause the surface fiber of the rock wool insulation board to partially melt and interweave with the gradient structure layer on the inner surface of the fiber cement board. After cooling, an interface reinforcement layer is formed on the rock wool insulation board.

7. The method for fastening connection of glass curtain wall and insulation board according to claim 6, characterized in that: The process of pressing the reinforced rock wool insulation board onto the curtain wall keel from the inside out is specifically performed by a robotic arm equipped with a pressure feedback control system. The end of the robotic arm is equipped with a pressure plate that matches the size of the insulation board. The pressure plate has clearance holes corresponding to the positions of the bi-directional elastic barbs. During pressing, the robotic arm drives the pressure plate to push the insulation board toward the keel. The pressure feedback control system monitors the reaction force borne by the pressure plate in real time. When the reaction force reaches the threshold corresponding to the design clamping force of the rock wool insulation board, the robotic arm maintains the pressure state for a preset time. During this process, the tips of the bi-directional barbs pierce the surface layer of the insulation board in sequence and penetrate into the interface reinforcement layer until the back of the insulation board is attached to the surface of the keel.

8. The method for fastening connection of glass curtain wall and insulation board according to claim 7, characterized in that: After being pressed into place, the working robotic arm retracts the pressure plate, and the bidirectional elastic barb pieces rely on their own elasticity to reset and open inside the interface reinforcement layer of the rigid fiber cement board. At this time, an endoscope inspection device is used to collect images of the opening state of the barb tips in the reinforcement layer through the reserved observation hole from the outside of the insulation board. The collected images are then compared with the image template of the standard opening state to confirm whether the barb pieces have formed an effective bidirectional barb anchoring.

9. The method for fastening connection of glass curtain wall and insulation board according to claim 8, characterized in that: When image comparison reveals that the opening angle of a certain barb is not at the preset angle, a point pressure compensation tool is used for correction. The point pressure compensation tool has a guide sleeve that can be fitted on the outside of the barb and a miniature pressure head located inside the sleeve. The guide sleeve is aligned with the location of the barb, and the miniature pressure head is driven to apply a supplementary pressure perpendicular to the plate surface to the insulation board and interface reinforcement layer around the barb. The supplementary pressure causes the fiber cement-based material of the interface reinforcement layer to flow, which is used to wrap the barb and make the barb open further.

10. The method for fastening connection of glass curtain wall and insulation board according to claim 8, characterized in that: After all the barbs are effectively anchored and pass inspection, the glass curtain wall and the insulation board are firmly connected. At this time, the bidirectional elastic barbs, through the bidirectional hooks formed by their tips in the fiber matrix of the rigid fiber cement board, constrain the pull-out displacement of the insulation board along the normal direction. At the same time, the firm connection between the root of the barb and the keel mounting base, as well as the mutual meshing between the open part of the barb and the reinforcing layer fiber, jointly constrain the sliding displacement of the insulation board along the tangential direction.

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