Light guide pipe waterproof structure installed on metal roof

Abstract

The invention discloses a light guide pipe waterproof structure installed on a metal roof, and relates to the technical field of light guide pipes. The light guide pipe waterproof structure comprises a light guide pipe body, and the light guide pipe body is arranged in a mounting through hole of the metal roof in a penetrating mode. The light guide pipe body is connected with the metal roof through the mounting base; the self-adaptive sealing module is of an annular structure, the light guide pipe body is sleeved with the self-adaptive sealing module, and the self-adaptive sealing module is located between the light guide pipe body and the mounting through hole; and the self-adaptive sealing module is used for connecting the light guide pipe body with the mounting through hole in a sealing manner, and the self-adaptive sealing module can generate radial displacement, axial displacement and angular deflection relative to the metal roof. According to the technical scheme, the waterproof performance of the waterproof structure of the light guide pipe can be improved.

Description

Technical Field

[0001] This invention relates to the field of light guide tube technology, and in particular to a waterproof structure for a light guide tube installed on a metal roof. Background Technology

[0002] The demand for light pipes in industrial plants to provide natural lighting on metal roofs is increasing. However, traditional waterproofing techniques for light pipes present a significant challenge: the inherent characteristics of metal roofs clash with the installation process. While metal roofs (such as galvanized steel and aluminum) offer advantages in terms of lightweight and high strength, their joints are prone to micro-cracks due to thermal expansion and contraction. Furthermore, long-term exposure to rain and UV radiation can lead to corrosion and leakage risks. Installing light pipes requires penetrating the metal roof, disrupting the existing waterproofing continuity and creating a seepage path. Current technologies use a single sealant or rubber gasket at the joints to prevent leaks; however, thermal expansion and contraction of metal roofs can cause cracks at the sealing interface, resulting in a short sealing period. Additionally, when existing building roofs experience localized settlement (≤3% slope), the rigidly connected light pipes are prone to misalignment relative to the metal roof, also leading to cracks at the sealing interface and sealing failure.

[0003] It should be noted that the above content is only used to help understand the technical solution of the present invention, and does not represent an admission that the above content is prior art. Summary of the Invention

[0004] The main objective of this invention is to propose a waterproof structure for light guide tubes installed on metal roofs, aiming to improve the waterproof performance of the light guide tube waterproof structure.

[0005] To achieve the above objectives, the present invention proposes a waterproof structure for light guide tubes installed on metal roofs; Specifically, the waterproof structure of the light guide tube includes: The light guide tube body is disposed through the mounting through hole of the metal roof; Mounting base, through which the light guide tube body is connected to the metal roof; An adaptive sealing module with a ring structure is sleeved on the light guide tube body and located between the light guide tube body and the mounting through hole; the adaptive sealing module is used to seal the light guide tube body and the mounting through hole together, and the adaptive sealing module can undergo radial displacement, axial displacement and angular deflection relative to the metal roof.

[0006] In one embodiment, the adaptive sealing module includes a gradient elastic ring and a corrugated compensation ring sequentially nested from the inside out; specifically, The gradient elastic ring includes a first elastic ring and a second elastic ring nested together. The hardness value of the first elastic ring is greater than that of the second elastic ring, and the first elastic ring is located on the side closer to the light guide tube body. The corrugated compensation ring includes an upper connecting ring and a lower connecting ring arranged parallel to each other, with a corrugated plate between the upper connecting ring and the lower connecting ring; the inner diameter of the upper connecting ring is fixedly connected to the light guide tube body, and elastic sealant is injected into the gaps between the outer diameter of the upper connecting ring and the outer diameter of the lower connecting ring and the metal roof, and into the gap between the inner diameter of the lower connecting ring and the light guide tube body; the corrugated plate is in a pre-compressed state; and an annular gap is provided between the inner diameter of the corrugated plate and the gradient elastic ring, the annular gap being filled with a first sealant.

[0007] In one embodiment, the first elastic ring is interference-fitted with the light guide tube body; and the inner wall of the first elastic ring is provided with a toothed anti-slip structure.

[0008] In one embodiment, the mounting base has a ring structure and is fixedly sleeved on the outside of the light guide tube body; the bottom of the mounting base is provided with a vacuum adsorption area and an adhesive connection area, the vacuum adsorption area is provided with a vacuum suction cup, the adhesive connection area is provided with adhesive, and the mounting base is fixedly connected to the metal roof through the vacuum suction cup and the adhesive.

[0009] In one embodiment, a plurality of limiting buckles are provided on the outer periphery of the mounting base, and the plurality of limiting buckles are equidistantly arranged along the circumference of the mounting base; one end of the limiting buckle is fixedly connected to the mounting base, and the other end of the limiting buckle is bonded to the metal roof.

[0010] In one embodiment, the top of the mounting base is inclined, with its lower inclined end facing away from the light guide tube body; and a drainage groove is provided on the top of the mounting base and on the side of the lower inclined end, the drainage groove having a U-shaped cross-section, the drainage groove being connected to the drainage channel of the metal roof; a water guide grille is provided on the top of the drainage groove, the water guide grille having an opening ratio of 25~35%.

[0011] In one embodiment, the mounting base has an annular air pressure balancing chamber inside, which is connected to the outside through a vent hole with a diameter of 3-5 mm.

[0012] In one embodiment, the metal roof includes a sleeve member coaxially disposed in the mounting through hole, with an expansion joint between the sleeve member and the mounting through hole, and a second sealant injected into the expansion joint; the lower end of the sleeve member extends to the inner side of the metal roof and engages with the vertical edge located on the inner side of the metal roof.

[0013] In one embodiment, the light guide tube body includes a light-collecting part, a light-guiding part, and a diffuser part arranged sequentially from top to bottom; the light-collecting part is located on the outer side of the metal roof, and the diffuser part is located on the inner side of the metal roof; the light-guiding part is connected to the metal roof through the adaptive sealing module and the mounting base.

[0014] In one embodiment, the bottom of the light-collecting part is provided with an annular groove, and the light-collecting part is connected to the top of the light-guiding part by interference fit through the annular groove; and a sealing ring is provided between the annular groove and the light-guiding part, and a third sealant is applied to the joint between the sealing ring and the annular groove and / or the light-guiding part. In one embodiment, the light guide tube body further includes a tapered waterproof cover, which is fitted onto the outside of the light guide portion; the end of the waterproof cover with a relatively smaller diameter is connected to the annular groove, and the end of the waterproof cover with a relatively larger diameter is connected to the mounting base.

[0015] In one embodiment, the lower ends of the light guide are connected to the metal roof on opposite sides by steel wire ropes.

[0016] The technical solution of this invention establishes an installation base, enabling the light guide tube body to be fixedly connected to the metal roof, thus achieving installation and fixation between the light guide tube body and the metal roof. Simultaneously, an adaptive sealing module is installed between the light guide tube body and the installation through-hole. On one hand, the adaptive sealing module seals the light guide tube body and the installation through-hole together, preventing rainwater from leaking into the inner side of the metal roof through the joint. On the other hand, the adaptive sealing module can undergo radial, axial, and angular displacement relative to the metal roof, thus freeing the seal from forced fixation. It can undergo slight displacement with the thermal expansion and contraction or local settlement of the metal roof, fundamentally avoiding cracking caused by stretching or misalignment of the sealing interface, thereby significantly improving the waterproof performance of the light guide tube waterproof structure. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of an embodiment of the waterproof light guide tube structure provided by the present invention; Figure 2 for Figure 1 A magnified view of a section at point A in the middle; Figure 3 for Figure 1 A magnified view of a section at point B.

[0019] Explanation of reference numerals in the attached figures: 10. Light guide tube body; 11. Light collecting section; 111. Annular groove; 12. Light guiding section; 13. Diffusing section; 14. Sealing ring; 15. Waterproof cover; 16. Steel wire rope; 20. Metal roof; 21. Mounting through hole; 22. Sleeve; 30. Mounting base; 31. Limiting buckle; 32. Drainage channel; 33. Water guiding grid; 34. Air pressure balance chamber; 40. Adaptive sealing module; 41. Gradient elastic ring; 42. Corrugated compensation ring; The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0020] The technical solutions of this invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a portion of the embodiments of this invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0021] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0022] Furthermore, it should be noted that the descriptions involving "first," "second," etc., in this invention are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0023] The demand for light pipes in industrial plants to provide natural lighting on metal roofs is increasing. However, traditional waterproofing techniques for light pipes present a significant challenge: the inherent characteristics of metal roofs clash with the installation process. While metal roofs (such as galvanized steel and aluminum) offer advantages in terms of lightweight and high strength, their joints are prone to micro-cracks due to thermal expansion and contraction. Furthermore, long-term exposure to rain and UV radiation can lead to corrosion and leakage risks. Installing light pipes requires penetrating the metal roof, disrupting the existing waterproofing continuity and creating a seepage path. Current technologies use a single sealant or rubber gasket at the joints to prevent leaks; however, thermal expansion and contraction of metal roofs can cause cracks at the sealing interface, resulting in a short sealing period. Additionally, when existing building roofs experience localized settlement (≤3% slope), the rigidly connected light pipes are prone to misalignment relative to the metal roof, also leading to cracks at the sealing interface and sealing failure.

[0024] To address the aforementioned technical problems, this invention proposes a waterproof light guide structure for installation on metal roofs.

[0025] Please see Figures 1 to 3 In one embodiment of the present invention, the waterproof structure of the light guide tube includes: The light guide tube body 10 is provided through the mounting through hole 21 of the metal roof 20; Mounting base 30, the light guide tube body 10 is connected to the metal roof 20 through the mounting base 30; An adaptive sealing module 40 with an annular structure is sleeved on the light guide tube body 10 and located between the light guide tube body 10 and the mounting through hole 21. The adaptive sealing module 40 is used to seal the light guide tube body 10 and the mounting through hole 21 together, and the adaptive sealing module 40 can undergo radial displacement, axial displacement and angular deflection relative to the metal roof 20.

[0026] The technical solution of this embodiment uses an installation base 30 to fix the light guide tube body 10 to the metal roof 20, thereby achieving installation and fixation between the light guide tube body 10 and the metal roof 20. Simultaneously, an adaptive sealing module 40 is provided between the light guide tube body 10 and the installation through hole 21. On the one hand, the adaptive sealing module 40 seals the light guide tube body 10 and the installation through hole 21 together to prevent rainwater from leaking into the inner side of the metal roof 20 through the joint between the light guide tube body 10 and the metal roof 20. On the other hand, the adaptive sealing module 40 can undergo radial displacement, axial displacement, and angular deflection relative to the metal roof 20, so that the seal is no longer forcibly fixed and can undergo slight displacement with the thermal expansion and contraction or local settlement of the metal roof 20. This fundamentally avoids cracking caused by stretching or misalignment of the sealing interface, thereby significantly improving the waterproof performance of the light guide tube waterproof structure.

[0027] As a preferred embodiment of the above, the adaptive sealing module 40 includes a gradient elastic ring 41 and a corrugated compensation ring 42 sequentially arranged from the inside to the outside. With this arrangement, dynamic sealing is achieved through the synergistic effect of the gradient elastic ring 41 and the corrugated compensation ring 42. The order from the inside to the outside is the light guide tube body 10, the gradient elastic ring 41, and the corrugated compensation ring 42, thereby forming a composite protection structure of tube wall-elastic seal-corrugated displacement compensation.

[0028] Specifically, the gradient elastic ring 41 includes a first elastic ring (not shown in the figure) and a second elastic ring (not shown in the figure) nested together. The hardness value of the first elastic ring is greater than that of the second elastic ring, and the first elastic ring is located on the side closer to the light guide tube body 10. This arrangement creates a gradient structure that softens progressively from the inside out through the combination of the first and second elastic rings. The first elastic ring, with its higher hardness, provides structural support to ensure a strong connection between the gradient elastic ring 41 and the light guide tube body 10. The second elastic ring, with its lower hardness, enhances the interface adhesion and compensates for radial displacement through elastic deformation during temperature-induced deformation. In this embodiment, the compensated radial displacement value is ±3mm. In this embodiment, the first elastic ring is made of silicone rubber with a hardness value of 70 Shore A; the second elastic ring is made of TPU with a hardness value of 30 Shore A; and the first and second elastic rings are composite injection molded.

[0029] Specifically, the corrugated compensation ring 42 includes an upper connecting ring (not shown in the figure) and a lower connecting ring (not shown in the figure) arranged parallel to each other, and a corrugated plate (not shown in the figure) is provided between the upper connecting ring and the lower connecting ring; the inner diameter of the upper connecting ring is fixedly connected to the light guide tube body 10, and elastic sealant is injected into the gaps between the outer diameter of the upper connecting ring and the outer diameter of the lower connecting ring and the metal roof 20 (specifically the sleeve 22 mentioned below), and into the gap between the inner diameter of the lower connecting ring and the light guide tube body 10; the corrugated plate is in a pre-compressed state; and an annular gap is provided between the inner diameter of the corrugated plate and the gradient elastic ring 41, and the annular gap is filled with a first sealant. In this configuration, the corrugated compensation ring 42 is pre-compressed to give the corrugated plate a pre-compressed state. Then, the corrugated compensation ring 42 is fitted into the light guide section 12 of the light guide tube body 10 and moved to a preset installation position. Next, the inner diameter of the upper connecting ring is fixedly connected to the light guide section 12 of the light guide tube body 10 using stainless steel clamps. Elastic sealant is injected into the gaps between the outer diameters of the upper and lower connecting rings and the metal roof 20 (specifically, the sleeve 22 mentioned below), and into the gap between the inner diameter of the lower connecting ring and the light guide tube body 10. Simultaneously, the first sealant is bonded to the second elastic ring on the outer side of the gradient elastic ring 41 using a hot-pressing process, so that the corrugated compensation ring 42 and the gradient elastic ring 41 combine to form an integral structure. Regarding the axial displacement compensation principle: The corrugations of the corrugated plate are a series of uniform, annular peak-valley structures. Each corrugation is like a tiny "spring." When subjected to axial force (such as thermal expansion and contraction of the roof panel causing a change in the distance between the sleeve 22 and the light guide tube body 10), these corrugations undergo elastic deformation, causing a change in the height between the upper and lower connecting rings. Elastic sealant is injected into the gaps between the outer diameters of the upper and lower connecting rings and the metal roof 20 (specifically, the sleeve 22 mentioned below), and the gap between the inner diameter of the lower connecting ring and the light guide tube body 10. The elastic deformation characteristics of the sealant allow for a certain axial displacement space between the upper and lower connecting rings, thereby enabling a certain axial displacement between the light guide tube body 10 and the metal roof 20, thus achieving axial displacement compensation. Regarding the principle of angle deflection compensation: Lateral misalignment occurs between the light guide tube body 10 and the sleeve 22, resulting in an angle between the centerline. It is understandable that when the corrugated compensation ring 42 undergoes a combined deformation of compression on one side and tension on the other, the central axis of the corrugated plate can bend, thus adapting to the angle change. In this embodiment, the corrugated plate is made of 0.5mm stainless steel, with a corrugation height of 10mm and a corrugation pitch of 15mm. The corrugated compensation ring can absorb ±3mm axial displacement and ±2° angular deflection; thus, combined with the gradient elastic ring mentioned above, it can compensate for ±3mm radial displacement, enabling the adaptive sealing module 40 to achieve ±6mm three-dimensional displacement compensation.

[0030] The aforementioned adaptive sealing module 40 passed the QUV-B313 accelerated aging test (0.55W / m). 2 After 10,000 hours of testing (@340nm): the silicone rubber hardness change is ≤5 Shore A; the TPU tensile strength retention rate is ≥85%; the adhesive peel strength is ≥3.5 N / mm; the sealing interface design has a 10° tilt angle, reducing the intensity of direct ultraviolet radiation by 30%. Studies have shown that the maintenance-free period can be extended to 20 years.

[0031] Furthermore, the first elastic ring is interference-fitted with the light guide tube body 10; and the inner wall of the first elastic ring is provided with a toothed anti-slip structure. This configuration ensures a strong connection between the first elastic ring and the light guide tube body 10 through the interference fit, while the toothed anti-slip structure enhances anti-slip capability. In this embodiment, the inner diameter of the first elastic ring is 1.5~2mm smaller than the outer diameter of the light guide tube body 10 (interference amount 3%~5%); during installation, a hydraulic expansion tool (pressure ≥3MPa) is used to expand the inner diameter of the first elastic ring and fit it into the light guide tube body 10, thereby forming a radial compression seal after rebound.

[0032] As a preferred embodiment of the above, the mounting base 30 has a ring-shaped structure and is made of high weather-resistant engineering plastic ASA. The mounting base 30 is fixedly sleeved on the outside of the light guide tube body 10. The bottom of the mounting base 30 is provided with a vacuum adsorption area (not shown in the figure) and an adhesive connection area (not shown in the figure). The vacuum adsorption area is provided with a vacuum suction cup, and the adhesive connection area is provided with adhesive. The mounting base 30 is fixedly connected to the metal roof 20 through the vacuum suction cup and the adhesive. This configuration increases the indirect connection area between the light guide tube body 10 and the metal roof 20 through the ring-shaped mounting base 30, thereby improving the connection strength between the light guide tube body 10 and the metal roof 20. At the same time, the mounting base 30 and the metal roof 20 adopt a dual combination connection method of vacuum suction cup + adhesive, avoiding drilling / welding and ensuring the integrity of the metal roof 20. In this embodiment, the vacuum suction cup is made of fluororubber, with a pull-out force ≥5kN; the adhesive is a two-component polyurethane with a tensile strength ≥8MPa and a shear strength ≥2MPa, forming a 3mm thick adhesive layer after curing. In actual operation, the mounting base 30 is usually designed with pre-reserved injection holes and vent holes. High-strength, highly elastic polymer adhesive is injected through the injection holes into the gap between the bottom surface of the mounting base 30 and the metal roof 20. The adhesive will fill the entire gap under pressure and overflow evenly from the vent holes, ensuring a dense and airtight filling.

[0033] Further, refer to Figure 2The mounting base 30 has several limiting buckles 31 arranged equidistantly along its circumference. One end of each limiting buckle 31 is fixedly connected to the mounting base 30, and the other end is bonded to the metal roof 20. This design prevents the mounting base 30 from unexpected circumferential rotation or horizontal slippage under alternating loads such as wind vibration and thermal expansion and contraction during long-term use, serving as an important mechanical supplement to vacuum adsorption and adhesive fixation. In this embodiment, the limiting buckles 31 adopt a bent-angle shape, with their inner side fixedly connected to the mounting base and their outer bottom bonded to the metal roof 20. They are made of 304 stainless steel coated with nylon material and constructed as spring steel sheets, allowing for a slippage of ±2mm to prevent stress concentration caused by rigid constraints.

[0034] Furthermore, the top of the mounting base 30 is inclined, with its lower inclined end facing away from the light guide tube body 10; this arrangement allows rainwater to flow along the top surface of the inclined mounting base 30 to the outside of the mounting base 30, preventing rainwater from accumulating at the connection between the mounting base 30 and the light guide tube body 10.

[0035] Furthermore, refer to Figure 2 A drainage channel 32 is provided on the top of the mounting base 30, on the lower inclined side. The drainage channel 32 has a U-shaped cross-section and is connected to the drainage channel (not shown in the attached diagram) of the metal roof 20. A water-guiding grille 33 is provided on top of the drainage channel 32, with an opening ratio of 25-35%. This arrangement guides the direction of rainwater discharge through the drainage channel 32, while the water-guiding grille 33 with an opening ratio of 25-35% ensures that rainwater flows to the drainage channel 32 and blocks debris such as leaves, ensuring the unobstructed flow of the drainage channel 32. In this embodiment, the U-shaped cross-section of the drainage channel 32 is 8mm deep and 12mm wide; the slope of the bottom of the drainage channel 32 is 5-8%, and the inclined direction points towards the drainage channel to accelerate the discharge speed of rainwater. The water-guiding grille 33 is made of laser-cut 316L stainless steel plate.

[0036] Furthermore, the walls and bottom of the drainage trough 32 are provided with flow-guiding ribs (not shown in the attached diagram), which are arranged in a V-shape. These flow-guiding ribs are arranged in a strictly parallel array to the drainage direction (i.e., along the slope direction of the bottom of the drainage trough 32). By setting the flow-guiding ribs, friction can be reduced: the laminar flow at the bottom layer is disturbed, reducing wall resistance; the water flow is concentrated: the water flow cross-section is constrained, increasing the flow velocity.

[0037] Further, refer to Figure 2The mounting base 30 has an annular air pressure balance chamber 34 inside, which is connected to the outside through a vent hole with a diameter of 3~5mm (not shown in the attached figure). With this setting, the air pressure inside and outside the air pressure balance chamber 34 is actively balanced, which fundamentally eliminates the driving force of water intrusion caused by "negative pressure siphon" or "positive pressure infiltration". Specifically, (1) Eliminating the negative pressure siphon effect: When the indoor and outdoor temperature drops suddenly or a strong wind passes over the roof, the air volume inside the sealing system shrinks or is forced out, forming a local negative pressure (lower than the external atmospheric pressure). This negative pressure will generate a strong "suction", and even a small gap may suck rainwater into the system. The air pressure balance chamber 34 is connected to the outside through the vent hole, which can instantly replenish the air, balance the internal and external pressure, and make the rainwater lose the driving force to be sucked in. (2) Counteracting the positive pressure infiltration driving force: In a high temperature environment, the air inside the system is heated and expands, forming a positive pressure. While positive pressure itself tends to prevent external water from entering, if it rains at this time, the accumulated water will cover the vents. The continuously expanding positive pressure inside will attempt to expel air, while simultaneously providing a potential thrust for water to seep in. The presence of the pressure balance chamber 34 allows for rapid pressure release, preventing pressure buildup and thus cutting off the water seepage path. Studies have shown that this embodiment can offset 90% of the positive pressure through the pressure balance chamber, with a leakage rate ≤1L / (m³). 2 ·h).

[0038] As a preferred embodiment of the above embodiments, refer to Figure 2The metal roof 20 also includes a sleeve 22, which is coaxially disposed in the mounting through hole 21. An expansion joint (not shown in the attached figure) is left between the sleeve 22 and the mounting through hole 21, and a second sealant is injected into the expansion joint. The lower end of the sleeve 22 extends to the inner side of the metal roof 20 and engages with the vertical edge located on the inner side of the metal roof 20. With this configuration, the sleeve 22 is a metal component with a certain strength and rigidity. During installation, a cutting machine is first used to precisely drill holes along the marked lines in the metal roof 20 to form installation through holes 21, wherein the diameter of the installation through hole 21 is 5-10mm larger than the outer diameter of the sleeve 22. After cutting, the burrs on the edge of the hole are cleaned, polished smooth, and coated with anti-rust paint. A ring-shaped butyl tape (width ≥ 50mm) is laid around the hole, and EPDM waterproof membrane is covered between the upper edge of the sleeve and the metal roof as an edge sealing and waterproofing treatment to form a preliminary waterproof layer. Then, the sleeve 22 is coaxially set in the installation through hole 21 of the metal roof 20. Its core function is to strengthen the edge strength of the installation through hole 21 and prevent the thin-walled roof panel from deforming or tearing due to wind load or installation stress. Meanwhile, an expansion joint is provided between the sleeve 22 and the mounting through hole 21, and a second sealant is injected into the expansion joint. This expansion joint allows the metal roof 20 to move slightly relative to the fixed light guide tube body 10 and sleeve 22 when it expands and contracts due to temperature differences, without transferring stress to the waterproof structure and preventing the seal from cracking. Simultaneously, the lower end of the sleeve 22 extends to the inside of the metal roof 20 and is physically locked to its vertical edge using a mechanical interlocking tool (manual or electric interlocking pliers). This connection method is high-strength and reliable, and is the standard process for the metal roof 20 system, achieving a rigid or semi-rigid connection between the sleeve 22 and the metal roof 20. In this embodiment, the length of the lower extension of the sleeve 22 is 50mm, and the width of the expansion joint is 8mm. Because it extends downwards to the inside of the metal roof 20, this 50mm extension provides operating space and sufficient connection area for the lower mechanical connection.

[0039] As a preferred embodiment of the above, the light guide tube body 10 includes a light-collecting section 11, a light-guiding section 12, and a diffuser section 13 arranged sequentially from top to bottom. The light-collecting section 11 is located on the outer side of the metal roof 20, and the diffuser section 13 is located on the inner side of the metal roof 20. The light-guiding section 12 is connected to the metal roof 20 through an adaptive sealing module 40 and a mounting base 30. This arrangement divides the light guide tube body 10 into three sections: the uppermost light-collecting section 11, the middle light-guiding section 12, and the lowermost diffuser section 13. The light-collecting section 11 extends to the outer side of the metal roof 20 and is responsible for collecting outdoor natural light. The light-guiding section 12 penetrates the mounting through-hole 21 of the metal roof 20 and is a channel for light to be transmitted downwards. It is connected to the metal roof 20 through the adaptive sealing module 40 and the mounting base 30. The diffuser section 13 is located on the inner side of the metal roof 20 and evenly diffuses the light transmitted through the light guide section 12 into the working area of ​​the industrial plant. In this embodiment, the light-collecting part 11 adopts a conical dome structure to collect natural light over the maximum range.

[0040] Further, refer to Figure 3 The bottom of the light-collecting part 11 is provided with an annular groove 111, and the light-collecting part 11 is connected to the top of the light guide part 12 through the annular groove 111 with an interference fit. A sealing ring 14 is provided between the annular groove 111 and the light guide part 12, and a third sealant is applied to the joint between the sealing ring 14 and the annular groove 111 and / or the light guide part 12. With this configuration, an annular groove 111 is pre-fabricated at the bottom of the light-collecting part 11, and the inner diameter of the groove is slightly smaller than the outer diameter of the top of the light guide part 12. During installation, the light guide part 12 is directly inserted into the groove, and the interference fit forms the first mechanical locking. At the same time, an annular sealing ring 14 is provided between the annular groove 111 and the light guide part 12. When squeezed, it generates uniform radial pressure to achieve the second elastic seal. Finally, a third sealant is applied to the joint between the sealing ring 14 and the annular groove 111 and / or the light guide part 12 to fill the micro gaps and resist ultraviolet rays and rainwater erosion. The three-stage seal works in tandem to maintain airtightness and watertightness over a long period of time. The entire interface requires no screws, rivets, or welding; on-site installation can be completed simply by "inserting, pressing, and applying adhesive," significantly improving installation efficiency and allowing for individual disassembly and maintenance.

[0041] Furthermore, the light guide tube body 10 also includes a conical waterproof cover 15, which is fitted onto the outside of the light guide section 12. The smaller diameter end of the waterproof cover 15 connects to an annular groove 111, and the larger diameter end connects to the mounting base 30. This configuration adds a conical waterproof cover 15 around the light guide section 12. The smaller end of the cover tightly engages with the annular groove 111 at the bottom of the light-collecting section 11, while the larger end extends downwards to the mounting base 30 and is sealed thereto, thus forming a continuous, closed conical "awning" between the light-collecting section 11 and the metal roof 20. Its conical slope is ≥10°, which can quickly guide rainwater to the drainage channel 32 of the mounting base 30, preventing liquid from stagnating at the root of the light guide tube body 10. In this embodiment, the waterproof cover 15 is made of fluorocarbon-coated stainless steel with a thickness of 0.8 mm.

[0042] Furthermore, the lower ends of the light guide section 12 are connected to the metal roof 20 on opposite sides by steel wire ropes 16; this arrangement helps to improve the connection strength between the light guide tube body 10 and the metal roof 20.

[0043] It should be noted that other aspects of the waterproof light guide tube structure for installation on metal roofs disclosed in this invention are prior art and will not be elaborated here.

[0044] The above are merely optional embodiments of the present invention and do not limit the patent scope of the present invention. Any application of the present invention directly or indirectly in other related technical fields is included within the patent protection scope of the present invention.

Claims

1. A light pipe waterproof structure installed on a metal roof, characterized by: The light guide pipe waterproof structure comprises: a light guide pipe body arranged in the mounting hole of the metal roof; a mounting base connecting the light guide pipe body and the metal roof; a ring-shaped adaptive sealing module sleeved on the light guide pipe body and located between the light guide pipe body and the mounting hole; the adaptive sealing module is used to seal the light guide pipe body and the mounting hole, and can be radially displaced, axially displaced and angularly deflected relative to the metal roof.

2. The waterproof structure of the light guide pipe according to claim 1, wherein: The adaptive sealing module comprises a gradient elastic ring and a corrugated compensation ring sleeved in sequence from inside to outside; specifically, the gradient elastic ring comprises a first elastic ring and a second elastic ring sleeved in sequence, the hardness value of the first elastic ring is greater than that of the second elastic ring, and the first elastic ring is located on the side close to the light guide pipe body; the corrugated compensation ring comprises an upper connecting ring and a lower connecting ring arranged in parallel, a corrugated plate is arranged between the upper connecting ring and the lower connecting ring; the inner diameter of the upper connecting ring is fixedly connected with the light guide pipe body, the outer diameter of the upper connecting ring and the outer diameter of the lower connecting ring are located at the gap between the metal roof, and the inner diameter of the lower connecting ring is located at the gap between the light guide pipe body; the gap between the inner diameter of the corrugated plate and the gradient elastic ring is filled with a first sealing glue.

3. The waterproof structure of the light guide pipe according to claim 2, wherein: The first elastic ring is in interference fit with the light guide pipe body, and the inner wall of the first elastic ring is provided with a tooth-shaped anti-skid structure.

4. The waterproof structure of the light guide pipe according to claim 1, wherein: The mounting base is in the form of a ring and is fixedly sleeved on the outer side of the light guide pipe body; the bottom of the mounting base is provided with a vacuum adsorption area and a glue bonding area, the vacuum adsorption area is provided with a vacuum suction cup, and the glue bonding area is provided with an adhesive; the mounting base is fixedly connected with the metal roof through the vacuum suction cup and the adhesive.

5. The waterproof structure of the light guide pipe according to claim 4, wherein: The outer periphery of the mounting base is provided with a plurality of limiting buckles, and the plurality of limiting buckles are equidistantly arranged along the circumference of the mounting base; one end of the limiting buckle is fixedly connected with the mounting base, and the other end of the limiting buckle is adhesively connected with the metal roof.

6. The waterproof structure of the light guide pipe according to claim 4, wherein: The top of the mounting base is inclined, and the inclined lower end is away from the light guide pipe body; a drainage groove is formed in the top of the mounting base and on the side of the inclined lower end; the cross section of the drainage groove is in the form of a U-shaped structure, the drainage groove is in communication with the drainage channel of the metal roof; a water guide grille is arranged above the drainage groove, and the opening rate of the water guide grille is 25-35%.

7. The waterproof structure of the light guide pipe according to claim 4, wherein: An annular gas pressure balance cavity is arranged in the mounting base, and the gas pressure balance cavity is in communication with the outside through an air hole with a diameter of 3-5 mm.

8. The waterproof structure of the light guide pipe according to claim 1, wherein: The metal roof comprises a sleeve member coaxially arranged in the mounting through hole, a gap is left between the sleeve member and the mounting through hole, and a second sealant is injected in the gap; the lower end of the sleeve member extends to the inner side of the metal roof and is engagedly connected with the standing edge on the inner side of the metal roof.

9. The waterproof structure of the light guide pipe according to any one of claims 1 to 8, characterized by: The light guide pipe body comprises a light collecting portion, a light guiding portion and a diffusion portion arranged in sequence from top to bottom; the light collecting portion is located on the outer side of the metal roof, and the diffusion portion is located on the inner side of the metal roof; the light guiding portion is connected with the metal roof through the self-adaptive sealing module and the mounting base.

10. The waterproof structure of the light guide pipe according to claim 9, wherein: The bottom of the light collecting portion is provided with an annular clamping groove, the light collecting portion is connected with the top of the light guiding portion through interference fit of the annular clamping groove, and a sealing ring is arranged between the annular clamping groove and the light guiding portion, and the sealing ring is coated with a third sealant at the joint of the annular clamping groove and / or the light guiding portion; Furthermore, the light guide pipe body further comprises a tapered waterproof cover, the waterproof cover is sleeved on the outer side of the light guiding portion; one end of the waterproof cover with relatively small diameter is connected with the annular clamping groove, and the other end of the waterproof cover with relatively large diameter is connected with the mounting base; Furthermore, the lower end of the light guiding portion is connected with the metal roof through steel wire ropes on opposite sides.

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