Door and window lightning protection pre-embedded connecting assembly and installation method thereof

Abstract

The application relates to a lightning protection pre-buried connecting assembly for doors and windows and a mounting method thereof. The connecting assembly comprises a U-shaped metal clamping groove, a connecting plate, a locking bolt, a wire box and flexible filler. The U-shaped metal clamping groove is used for clamping on a lightning protection grounding steel bar and is locked and fixed through the locking bolt; one end of the connecting plate is fixedly connected with the U-shaped metal clamping groove and is conductive, and the other end is provided with a lightning protection cross-connection hole and penetrates through the bottom wall of the wire box to extend into the interior of the wire box; the flexible filler is filled in the wire box to prevent the connecting plate from being wrapped by concrete during concrete pouring. The application can complete pre-buried mounting in the structure construction stage, and after the concrete solidifies, the flexible filler can be removed to expose the connecting plate; during door and window installation, a finished lightning protection cross-line is butt-jointed with the connecting plate through a bolt, rapid lightning protection connection without on-site welding and punching structure throughout is realized, and the application has the advantages of construction safety, protection of the main body structure, accurate positioning, strong adaptability, high efficiency and low cost.

Description

Technical Field

[0001] This invention relates to the field of lightning protection grounding technology in building engineering, and more specifically, to a lightning protection pre-embedded connection component for doors and windows and its installation method. Background Technology

[0002] With the continuous increase in building height, the issue of lightning protection for high-rise buildings is receiving increasing attention. According to relevant building industry regulations, large metal structures such as railings, doors, and windows on the exterior walls of high-rise buildings should be reliably connected to lightning protection devices. Aluminum alloy and steel doors and windows have good electrical conductivity; when used as part of the building's external envelope, effective grounding measures must be taken to serve both as lightning protection facilities and to prevent static electricity generation. Therefore, all metal doors and windows in high-rise buildings require lightning protection grounding treatment, which involves equipotentially connecting the main body of the metal doors and windows to the building's main lightning protection system, ensuring that their grounding resistance meets design specifications.

[0003] Currently, the lightning protection grounding construction of building doors and windows mainly adopts two processes: post-installation welding and simple pre-embedded flat steel. The post-installation welding process involves chiseling the completed structural wall after the doors and windows are installed to expose the lightning protection grounding reinforcement, and then welding the connection on-site. This method not only easily damages the main reinforcement and concrete structure, posing a fire hazard, but also involves complex procedures and makes it difficult to guarantee quality. While the simple pre-embedded flat steel process involves pre-embedding during the structural construction stage, the flat steel needs to be welded and fixed to the grounding reinforcement one by one. Displacement and skewing are prone to occur during concrete pouring, and there are no standard connection holes, requiring further welding or drilling later. This results in poor stability and reliability of the lightning protection connection and a high rework rate.

[0004] In view of the shortcomings of the existing technology, there is an urgent need in the field for a lightning protection pre-embedded installation connection device for doors and windows that can be conveniently pre-embedded during the construction stage of building structure, requires no on-site welding, has reliable connection, is compatible with grounding steel bars of various specifications, and facilitates quick connection during the later installation of doors and windows. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a lightning protection pre-embedded connection component for doors and windows and its installation method, in order to solve the problems existing in the prior art.

[0006] According to a first aspect of the present invention, a lightning protection pre-embedded connection assembly for doors and windows is provided, comprising: U-shaped metal slots are used to secure the lightning protection grounding steel bars of the building structure. The connecting plate has one end fixedly connected to the U-shaped metal slot and electrically connected, and the other end is provided with a lightning protection bridging connection hole for connecting to the metal parts of doors and windows. A set bolt is screwed into a set threaded hole on the side wall of the U-shaped metal slot, used to lock and fix the U-shaped metal slot to the lightning protection grounding steel bar; The junction box is a box-shaped structure with an open top. One end of the connecting plate, which has a lightning protection bridging connection hole, extends through the bottom wall of the junction box and into the interior of the junction box. Flexible filler is used to fill the inside of the junction box to protect the connecting plate during concrete pouring.

[0007] Preferably, the opening width of the U-shaped metal slot is greater than the diameter of the lightning protection grounding steel bar, the opening depth of the U-shaped metal slot is not less than 1.5 times the diameter of the lightning protection grounding steel bar, and the wall thickness of the U-shaped metal slot is 2mm to 4mm.

[0008] Preferably, the connecting plate is made of flat steel, the width of the connecting plate is greater than or equal to 25mm, the thickness of the connecting plate is greater than or equal to 4mm, and the connecting plate and the U-shaped metal slot are fixedly connected by double-sided full welding.

[0009] Preferably, both the U-shaped metal slot and the connecting plate are made of hot-dip galvanized steel.

[0010] Preferably, the set bolt is a hexagonal head bolt, and the diameter of the set threaded hole on the side wall of the U-shaped metal slot is 8mm to 12mm.

[0011] Preferably, the lightning protection bridging connection hole is a round hole with a diameter of 6mm to 10mm.

[0012] Preferably, a slotted hole is formed on the bottom wall of the junction box, and the connecting plate extends into the interior of the junction box through the slotted hole; the slotted hole is located in the center of the bottom wall of the junction box, the width of the slotted hole matches the thickness of the connecting plate, and the length of the slotted hole matches the width of the connecting plate.

[0013] Preferably, the flexible filler is polystyrene foam, polyurethane foam, or rubber foam material.

[0014] Preferably, the inner wall of the U-shaped metal slot is coated with an electrical composite grease.

[0015] According to a second aspect of the present invention, an installation method for the pre-embedded connection assembly for lightning protection of doors and windows as described above is provided, comprising the following steps: Step 1: During the building structure construction phase, the U-shaped metal slot is attached to the lightning protection grounding steel bar at the door and window structure location. The set bolt is inserted into the set thread hole and tightened to fix the U-shaped metal slot to the lightning protection grounding steel bar. Step 2: Position the junction box on the side opposite to the opening of the U-shaped metal slot, so that the connecting plate extends through the bottom wall of the junction box into the interior of the junction box; Step 3: Before pouring concrete, fill the inside of the junction box with flexible filler and seal the opening of the junction box. Step 4: Pour concrete. After the concrete has solidified, remove the flexible filler inside the junction box to expose the connecting plate. Step 5: Use a pre-made lightning protection jumper wire. One end of the wire is connected to the connecting plate through the lightning protection jumper connection hole, and the other end is connected to the metal parts of the door and window to complete the lightning protection grounding of the door and window.

[0016] Compared with existing technologies, this invention utilizes a U-shaped metal slot locking mechanism with set bolts, a pre-embedded protection method using a junction box and flexible filler, and a quick connection method with pre-reserved lightning protection bridging holes on the connecting plate. This allows the entire lightning protection grounding connection process to be pre-embedded during the structural construction phase, requiring only simple bolt connections during door and window installation. No on-site welding or structural chiseling is needed throughout the entire process. This invention effectively eliminates fire hazards, protects the main structure, achieves accurate positioning and convenient location of embedded parts, is compatible with various specifications of grounding steel bars, significantly improves construction efficiency, simplifies construction procedures, and reduces construction costs, demonstrating promising prospects for widespread application. Attached Figure Description

[0017] The above and other objects, features and advantages of the present invention will become clearer from the following description of embodiments of the invention with reference to the accompanying drawings.

[0018] Figure 1 A three-dimensional structural diagram of the U-shaped metal slot and connecting plate assembly in the door and window lightning protection pre-embedded connection assembly according to an embodiment of the present invention is shown.

[0019] Figure 2 A three-dimensional structural schematic diagram of the junction box in the lightning protection pre-embedded connection assembly for doors and windows according to an embodiment of the present invention is shown.

[0020] Figure 3 A top view of the junction box in the lightning protection pre-embedded connection assembly for doors and windows according to an embodiment of the present invention is shown.

[0021] In the diagram: 1. U-shaped metal slot; 11. Set screw hole; 2. Connecting plate; 21. Lightning protection bridging connection hole; 3. Set bolt; 4. Junction box; 41. Slotted hole; 5. Flexible filler. Detailed Implementation

[0022] Various embodiments of the invention will now be described in more detail with reference to the accompanying drawings. In the various drawings, the same elements are indicated by the same or similar reference numerals. For clarity, the various parts in the drawings are not drawn to scale.

[0023] This invention provides a lightning protection pre-embedded connection component for doors and windows, see [link / reference]. Figures 1 to 3The lightning protection pre-embedded connection assembly for doors and windows includes a U-shaped metal slot 1, a connecting plate 2, a set bolt 3, a junction box 4, and flexible material. The U-shaped metal slot 1 has a channel-shaped structure and is used to clamp and fix with the lightning protection grounding reinforcement of the building structure. The connecting plate 2 has a strip-shaped plate structure; one end of the connecting plate 2 is fixedly connected to the U-shaped metal slot 1 and electrically connected, while the other end of the connecting plate 2 has a lightning protection bridging connection hole 21 for connecting with the metal components of the doors and windows. The set bolt 3 is screwed into a set threaded hole 11 on the side wall of the U-shaped metal slot 1 to lock and fix the U-shaped metal slot 1 to the lightning protection grounding reinforcement. The junction box 4 has a box-shaped structure with an open top; one end of the connecting plate 2 with the lightning protection bridging connection hole 21 extends through the bottom wall of the junction box 4 and into its interior. The flexible filler 5 fills the interior of the junction box 4 to protect the connecting plate 2 during concrete pouring.

[0024] Specifically, the U-shaped metal slot 1 is made of metal, preferably hot-dip galvanized steel, to ensure good electrical conductivity and corrosion resistance. (See attached image) Figure 1 The U-shaped metal slot 1 has a bottom wall and two opposing side walls, and is generally shaped like a channel steel. The U-shaped opening of the U-shaped metal slot 1 is used to hold the lightning protection grounding rebar connected to the receiver. In specific implementations, the opening width of the U-shaped metal slot 1 is larger than the diameter of the lightning protection grounding rebar to facilitate embedding the lightning protection grounding rebar into the U-shaped slot. Since the diameter of the lightning protection grounding rebar in the building structure may vary due to design requirements, the opening width of the U-shaped metal slot 1 can be selected according to different size specifications as needed. To ensure that the slot has sufficient coverage area for the lightning protection grounding rebar to ensure reliable conductive contact, the opening depth of the U-shaped metal slot 1 is designed to be no less than 1.5 times the diameter of the lightning protection grounding rebar. The wall thickness of the U-shaped metal slot 1 is usually 2mm to 4mm. Within this thickness range, the slot has sufficient structural strength to withstand the locking force of the set bolt 3 without deformation. For example, for lightning protection grounding steel bars with a diameter of 16mm to 18mm, the opening width of the U-shaped metal slot 1 is designed to be 20mm, the opening depth is 30mm, and the wall thickness is 3mm. The U-shaped metal slot 1 can be formed by bending a 3mm thick hot-dip galvanized steel plate.

[0025] In a preferred embodiment, at least two set screw holes 11 are provided on each of the two side walls of the U-shaped metal slot 1. The set screw holes 11 on both sides are arranged opposite each other so that the lightning protection grounding steel bar can be locked simultaneously from both sides after the set bolts 3 are screwed into the set screw holes 11 on both sides, making the clamping of the lightning protection grounding steel bar by the slot more secure and uniform. As an alternative embodiment, at least two set screw holes 11 can be provided on only one side wall of the U-shaped metal slot 1, with the other side wall serving as the abutment surface, which can also achieve the locking function. The diameter of the set screw holes 11 is 8mm to 12mm, that is, the thread specification of the set screw holes 11 is M8 to M12, which is compatible with the specification of the selected set bolts 3. The set bolt 3 is preferably a hex head bolt (standard number: GB / T 5783-2016), but an internal hex socket head cap screw (standard number: GB / T70.1-2008) can also be used for easy tightening with a common open-end wrench or internal hex wrench. The set bolt 3 is made of stainless steel or hot-dip galvanized steel, which has good rust resistance and sufficient mechanical strength. During installation, the set bolt 3 is screwed into the set threaded hole 11 from the outside of the side wall of the U-shaped metal slot 1. Its end passes through the side wall and abuts against the surface of the lightning protection grounding steel bar embedded in the U-shaped metal slot 1. By tightening the set bolt 3, a clamping force is generated, thereby firmly locking and fixing the U-shaped metal slot 1 to the lightning protection grounding steel bar.

[0026] Furthermore, the connecting plate 2 is made of flat steel, with a width greater than or equal to 25mm and a thickness greater than or equal to 4mm. The connecting plate 2 and the U-shaped metal slot 1 are fixedly connected by double-sided full welding. Specifically, the connecting plate 2 is preferably made of hot-dip galvanized flat steel to ensure good conductivity and corrosion resistance. The specifications of the flat steel are selected according to the requirements of the building lightning protection design code, and are generally not less than 25mm × 4mm (width × thickness), that is, the width is not less than 25mm and the thickness is not less than 4mm. For example, the specifications of the flat steel can be 25mm × 4mm, 30mm × 4mm, or 40mm × 4mm.

[0027] One end of the connecting plate 2 is fixedly connected to the outer side of the bottom wall of the U-shaped metal slot 1 (the side of the bottom wall facing away from the U-shaped opening) by welding. To ensure the firmness of the connection and the reliability of conductivity, a double-sided full welding method is preferably used between the connecting plate 2 and the bottom wall of the U-shaped metal slot 1, that is, continuous welds are applied to both sides of the end of the connecting plate 2 that contact the outer side of the bottom wall of the U-shaped metal slot 1. The length of the weld is not less than twice the width of the connecting plate 2 to ensure that the weld has sufficient strength and conductive cross-sectional area. After welding, the weld slag should be removed and anti-corrosion treatment should be performed (such as applying anti-rust paint or hot-dip galvanizing repair coating) to protect the welded area from rust. The other end of the connecting plate 2 is provided with a lightning protection bridging connection hole 21. The lightning protection bridging connection hole 21 is a round hole that penetrates the thickness direction of the connecting plate 2 and is used to connect to one end of the finished lightning protection bridging wire through a bolt assembly. The diameter of the lightning protection bridging connection hole 21 is usually 6mm to 10mm, and 8mm can be selected as a specific embodiment. The hole diameter is compatible with the bolt hole diameter of commonly used lightning protection jumper terminals. The overall length of the connecting plate 2 should be designed according to the location of the door and window openings and the pre-embedded depth. In specific implementation, the total length of the connecting plate 2 should ensure that the U-shaped metal slot 1 at one end can reach the position of the lightning protection grounding steel bar, while the other end can pass through the bottom wall of the junction box 4 and extend into the interior of the junction box 4 by a certain length. Usually, the length of the connecting plate 2 extending out of the bottom wall of the junction box 4 is 30mm to 50mm to provide sufficient operating space when connecting the lightning protection jumper later. As a specific embodiment, the length of the connecting plate 2 extending out of the bottom wall of the junction box 4 is 40mm.

[0028] like Figure 2 and Figure 3 As shown, junction box 4 is a rectangular or square junction box made of metal (such as hot-dip galvanized steel sheet) or plastic (such as PVC or ABS). Junction box 4 is embedded in the concrete structure to protect the protruding end of connecting plate 2 and facilitate locating the embedded position later. Junction box 4 has an internal cavity, with one side being an open surface and the remaining sides being closed surfaces. The opening of junction box 4 faces outward, i.e., towards the outer surface of the concrete structure. After the concrete is poured, the edge of the opening of junction box 4 is basically flush with the surface of the concrete structure, and construction personnel can quickly locate the embedded lightning protection connection component for doors and windows by observing the position of the opening of junction box 4 on the concrete surface.

[0029] To facilitate the insertion of the connecting plate 2, a straight hole 41 is provided on the bottom wall of the junction box 4. The straight hole 41 is an elongated, straight hole for the connecting plate 2 to pass through. The straight hole 41 is located in the center of the bottom wall of the junction box 4 to ensure that the connecting plate 2 is positioned in the central area inside the junction box 4 after insertion, facilitating subsequent connection operations. The width of the straight hole 41 matches the thickness of the connecting plate 2, and the length of the straight hole 41 matches the width of the connecting plate 2. In practice, the width of the straight hole 41 is slightly greater than the thickness of the connecting plate 2, and the length of the straight hole 41 is slightly greater than the width of the connecting plate 2, allowing the connecting plate 2 to pass through smoothly without causing excessive wobbling within the hole. Regarding the material selection of the junction box 4: when using a metal material (such as hot-dip galvanized steel sheet), the junction box 4 has high mechanical strength and can better resist the lateral pressure during concrete pouring; when using a plastic material, the junction box 4 has lower cost and will not cause electrochemical corrosion with the connecting plate 2. Both materials can achieve the functions of protecting the connecting plate 2 and facilitating positioning, and can be selected according to actual construction conditions and cost requirements.

[0030] The flexible filler 5 is inserted into the internal space of the junction box 4 to fill the gaps inside the junction box 4 during concrete pouring, preventing concrete slurry from seeping into the junction box 4 and encasing the connecting plate 2. The flexible filler 5 is made of a material with good plasticity and easy removal properties, specifically polystyrene foam, polyurethane foam, or rubber foam. These materials share the following characteristics: soft texture, elasticity, and the ability to fully fill the internal space of the junction box 4; they do not adhere to the concrete, and the interface between the two is clearly separated after the concrete hardens; they possess a certain degree of compressive strength and will not be crushed or squeezed out during concrete vibration. In practice, the flexible filler 5 is inserted into the junction box 4 and wraps the portion of the connecting plate 2 that extends into the junction box 4, filling it completely and ensuring no gaps are left around the connecting plate 2. After filling, the opening of the junction box 4 is temporarily sealed with plastic film or tape. After the concrete is poured and solidified, construction workers can easily remove the flexible filler 5 from the junction box 4 by hand or with simple tools (such as screwdrivers, hooks, pliers, etc.), thereby exposing the internal connecting plate 2 and the lightning protection bridging connection hole 21 on the connecting plate 2. Since the flexible filler 5 does not adhere to the concrete and the connecting plate 2, the removal process is very convenient and will not cause any damage to the connecting plate 2.

[0031] Furthermore, the inner wall of the U-shaped metal slot 1 is coated with an electrical composite grease. The electrical composite grease is a special conductive paste containing conductive metal particles, possessing excellent conductivity and anti-corrosion properties. Specifically, before attaching the U-shaped metal slot 1 to the lightning protection grounding rebar, the electrical composite grease can be evenly applied to the inner wall surface of the U-shaped metal slot 1 (preferably fully coating the U-shaped metal slot). When the set bolt 3 locks the U-shaped metal slot 1 onto the lightning protection grounding rebar, the electrical composite grease, under pressure, fills the microscopic gaps between the inner wall of the slot and the surface of the lightning protection grounding rebar, effectively increasing the conductive contact area, significantly reducing contact resistance, and simultaneously isolating air and moisture to prevent corrosion of the contact surface.

[0032] The present invention also provides an installation method for the pre-embedded connection component for lightning protection of doors and windows as described above, which includes the following steps: Step 1: During the building structure construction phase, the U-shaped metal slot 1 is attached to the lightning protection grounding steel bar at the door and window structure location. The set bolt 3 is inserted into the set thread hole 11 and tightened to fix the U-shaped metal slot 1 to the lightning protection grounding steel bar.

[0033] Specifically, before construction, the U-shaped metal slot 1 and the connecting plate 2 in the pre-embedded connection assembly for lightning protection of doors and windows are welded together. Welding can be performed in the factory or on-site. The welding adopts a double-sided full welding process, meaning that continuous welds are applied to both sides of the connecting plate 2 that contact the bottom wall of the U-shaped metal slot 1, with a weld length not less than twice the width of the connecting plate 2. After welding, the weld slag is removed and the weld quality is inspected to ensure that the weld is full, free of slag inclusions, porosity, and cracks. The welded area is then treated with anti-corrosion coating, such as zinc-rich paint or cold-dip galvanizing spray. After welding, the U-shaped metal slot 1 and the connecting plate 2 form a stable integrated structure with good electrical conductivity. This prefabrication step can be completed in batches in the factory, which helps ensure consistent processing quality and improves on-site construction efficiency.

[0034] During the building structure construction phase, before concrete pouring, the lightning protection pre-embedded connection component of this invention is installed at the lightning protection grounding reinforcement on the side of the door and window structure or at the edge of the opening, according to the layout of the door and window openings and the requirements of the design drawings. The specific operation is as follows: First, align the U-shaped opening of the U-shaped metal slot 1 with the lightning protection grounding reinforcement, so that the lightning protection grounding reinforcement is embedded in the U-shaped groove of the U-shaped metal slot 1. The U-shaped metal slot 1 should be positioned near the door and window structure for convenient operation when connecting to the door and window later. Then, insert the set bolt 3 into the set threaded hole 11 and tighten the set bolt 3 with a wrench. During the tightening process, the end of the set bolt 3 gradually approaches and abuts against the surface of the lightning protection grounding reinforcement, continuing to tighten to the set torque value. The tightening torque of the set bolt 3 is controlled between 10 N·m and 20 N·m. When simultaneously locking the U-shaped metal slot 1 from both side walls, the set bolts 3 on both sides should be tightened symmetrically and alternately to ensure that the U-shaped metal slot 1 evenly clamps the lightning protection grounding rebar and prevents skewing. After tightening, check whether the U-shaped metal slot 1 is firmly fixed to the lightning protection grounding rebar. Manually turning the U-shaped metal slot 1 should not result in noticeable slippage or rotation. Once confirmed to be secure, the next step can be performed.

[0035] In addition, apply electrical compound grease to the contact surface between the U-shaped metal slot 1 and the lightning protection grounding rebar. During operation, use a brush or scraper to evenly apply the electrical compound grease to the inner wall surface of the U-shaped metal slot 1 (preferably covering the entire U-shaped metal slot). The electrical compound grease should cover all metal surfaces that may come into contact with the grounding rebar, ensuring that after the set bolt 3 is tightened, the electrical compound grease can fully fill the entire contact interface between the inner wall of the slot and the surface of the lightning protection grounding rebar. The electrical compound grease can be applied before or after the U-shaped metal slot 1 is engaged with the lightning protection grounding rebar, or after engagement but before tightening the set bolt 3. It is preferable to apply it after engagement but before tightening, so that the slot is already positioned during application, and the electrical compound grease is less likely to be scraped off during engagement.

[0036] Step 2: Place the junction box 4 on the side opposite to the opening of the U-shaped metal slot 1, so that the connecting plate 2 passes through the bottom wall of the junction box 4 and extends into the interior of the junction box 4.

[0037] Specifically, the junction box 4 is fitted onto the protruding end of the connecting plate 2 through a slotted hole 41 on its bottom wall. During operation, the end of the connecting plate 2 with the lightning protection jumper connection hole 21 is aligned with the slotted hole 41 on the bottom wall of the junction box 4, and inserted from the outside to the inside of the junction box 4, allowing the connecting plate 2 to extend into the internal space of the junction box 4. The position of the junction box 4 on the connecting plate 2 is adjusted so that the length of the connecting plate 2 extending beyond the bottom wall of the junction box 4 is 30mm to 50mm. This length ensures sufficient operating space when connecting the lightning protection jumper wire later, while avoiding the connecting plate 2 extending too far and occupying too much space inside the junction box 4. Simultaneously, ensure that the opening of the junction box 4 faces outwards, i.e., towards the outer surface of the concrete structure, to facilitate later cleaning of the filler and connection operations. When installing the junction box 4, it is also necessary to ensure that the position of the junction box 4 matches the relative position of the door and window openings, ensuring that the lightning protection jumper wire can be easily connected to the connecting plate 2 during the later installation of doors and windows.

[0038] Step 3: Before pouring concrete, fill the inside of the junction box 4 with flexible filler 5 and seal the opening of the junction box 4.

[0039] Specifically, before pouring concrete, the internal space of the junction box 4 is filled with flexible filler 5. During operation, the flexible filler 5 is inserted into the junction box 4, compacting and filling it completely without leaving any gaps. Special attention should be paid to the area around the connecting plate 2, which must be tightly wrapped with flexible filler 5 to prevent concrete slurry from seeping in from any direction. After filling, the opening of the junction box 4 is sealed. The sealing method preferably uses plastic film or tape, covering the opening surface of the junction box 4 and sealing it to the edge of the opening. This sealing method ensures that concrete slurry will not enter the interior of the junction box 4 during concrete pouring and vibration. The seal should be tight, but not too thick or heavy, so as not to affect subsequent opening operations.

[0040] Step 4: Pour concrete. After the concrete has solidified, remove the flexible filler 5 inside the junction box 4 to expose the connecting plate 2.

[0041] Specifically, concrete pouring is carried out according to normal building construction procedures. During concrete pouring and vibration, because junction box 4 is filled with flexible filler 5 and its opening is sealed, concrete slurry cannot enter the interior of junction box 4. Flexible filler 5 also serves as a support, preventing the connecting plate 2 from bending or displacing under the lateral pressure of the concrete.

[0042] After the concrete is poured, it should be cured according to the normal curing schedule. Once the concrete has reached its design strength and solidified, remove the plastic film or tape from the opening of junction box 4. Then remove the flexible filler 5 inside junction box 4. Due to the good plasticity and easy removal of the flexible filler 5, construction workers can break it apart by hand or use simple tools such as hooks and screwdrivers to remove it from junction box 4. After cleaning, the protruding end of the connecting plate 2 will be exposed inside junction box 4, and the lightning protection bridging connection hole 21 on the connecting plate 2 will be clearly visible without any concrete covering.

[0043] Step 5: Use a pre-made lightning protection jumper wire, one end of which is connected to the connecting plate 2 through the lightning protection jumper connection hole 21, and the other end is connected to the metal parts of the door and window to complete the lightning protection grounding of the door and window.

[0044] Specifically, during the door and window installation phase, prefabricated lightning protection jumpers are used for connection. These prefabricated jumpers are flexible conductive wires with bolted terminals at both ends (the cross-sectional area of ​​the jumper is selected according to the drawings). During operation, one end of the jumper is bolted to the connecting plate 2 through the jumper connection hole 21 – the bolt is passed through the jumper connection hole 21 and simultaneously through the connection hole of the jumper terminal, and the nut is tightened to secure and conduct electricity. The other end of the jumper is bolted to the fixed iron plate or door / window frame – holes are drilled in the corresponding positions on the metal parts of the door / window or existing holes are used, and the bolt is passed through the other terminal of the jumper and the metal parts of the door / window, and the nut is tightened to secure and conduct electricity. After connection, the tightness of each connection point is checked, and the continuity resistance of the lightning protection grounding path is measured with an ohmmeter to confirm that the electrical connection is reliable and the resistance value meets the design specifications. At this point, the lightning protection grounding connection of the doors and windows is complete.

[0045] Compared with existing technologies, this invention utilizes a U-shaped metal slot locking mechanism with set bolts, a pre-embedded protection method using a junction box and flexible filler, and a quick connection method with pre-reserved lightning protection bridging holes on the connecting plate. This allows the entire lightning protection grounding connection process to be pre-embedded during the structural construction phase, requiring only simple bolt connections during door and window installation. No on-site welding or structural chiseling is needed throughout the entire process. This invention effectively eliminates fire hazards, protects the main structure, achieves accurate positioning and convenient location of embedded parts, is compatible with various specifications of grounding steel bars, significantly improves construction efficiency, simplifies construction procedures, and reduces construction costs, demonstrating promising prospects for widespread application.

[0046] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0047] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A lightning protection pre-embedded connection component for doors and windows, characterized in that, include: U-shaped metal slots are used to secure the lightning protection grounding steel bars of the building structure. The connecting plate has one end fixedly connected to the U-shaped metal slot and electrically connected, and the other end is provided with a lightning protection bridging connection hole for connecting to the metal parts of doors and windows. A set bolt is screwed into a set threaded hole on the side wall of the U-shaped metal slot, used to lock and fix the U-shaped metal slot to the lightning protection grounding steel bar; The junction box is a box-shaped structure with an open top. One end of the connecting plate, which has a lightning protection bridging connection hole, extends through the bottom wall of the junction box and into the interior of the junction box. Flexible filler is used to fill the inside of the junction box to protect the connecting plate during concrete pouring.

2. The door and window lightning protection pre-embedded connection assembly according to claim 1, characterized in that, The opening width of the U-shaped metal slot is greater than the diameter of the lightning protection grounding steel bar, the opening depth of the U-shaped metal slot is not less than 1.5 times the diameter of the lightning protection grounding steel bar, and the wall thickness of the U-shaped metal slot is 2mm to 4mm.

3. The door and window lightning protection pre-embedded connection assembly according to claim 1, characterized in that, The connecting plate is made of flat steel, with a width of ≥25mm and a thickness of ≥4mm. The connecting plate and the U-shaped metal slot are fixedly connected by double-sided full welding.

4. The door and window lightning protection pre-embedded connection assembly according to claim 1, characterized in that, Both the U-shaped metal slot and the connecting plate are made of hot-dip galvanized steel.

5. The door and window lightning protection pre-embedded connection assembly according to claim 1, characterized in that, The set bolt is a hexagonal head bolt, and the diameter of the set threaded hole on the side wall of the U-shaped metal slot is 8mm to 12mm.

6. The door and window lightning protection pre-embedded connection assembly according to claim 1, characterized in that, The lightning protection bridging connection hole is a round hole with a diameter of 6mm to 10mm.

7. The door and window lightning protection pre-embedded connection assembly according to claim 1, characterized in that, A slotted hole is provided on the bottom wall of the junction box, and the connecting plate extends into the interior of the junction box through the slotted hole; the slotted hole is located in the center of the bottom wall of the junction box, the width of the slotted hole matches the thickness of the connecting plate, and the length of the slotted hole matches the width of the connecting plate.

8. The door and window lightning protection pre-embedded connection assembly according to claim 1, characterized in that, The flexible filler is polystyrene foam, polyurethane foam, or rubber foam material.

9. The door and window lightning protection pre-embedded connection assembly according to claim 1, characterized in that, The inner wall of the U-shaped metal slot is coated with electrical composite grease.

10. An installation method for a door and window lightning protection pre-embedded connection assembly as described in any one of claims 1 to 9, characterized in that, Includes the following steps: Step 1: During the building structure construction phase, the U-shaped metal slot is attached to the lightning protection grounding steel bar at the door and window structure location. The set bolt is inserted into the set thread hole and tightened to fix the U-shaped metal slot to the lightning protection grounding steel bar. Step 2: Position the junction box on the side opposite to the opening of the U-shaped metal slot, so that the connecting plate extends through the bottom wall of the junction box into the interior of the junction box; Step 3: Before pouring concrete, fill the inside of the junction box with flexible filler and seal the opening of the junction box. Step 4: Pour concrete. After the concrete has solidified, remove the flexible filler inside the junction box to expose the connecting plate. Step 5: Use a pre-made lightning protection jumper wire. One end of the wire is connected to the connecting plate through the lightning protection jumper connection hole, and the other end is connected to the metal parts of the door and window to complete the lightning protection grounding of the door and window.

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