A distributed photovoltaic roof cable protection channel

Abstract

The utility model provides a kind of distributed photovoltaic roof cable protection slot, comprising: installation vertical plate, the side fixed connection of installation vertical plate has support bridge, the upper portion of support bridge is rotatably connected with pressing plate, first mounting hole is opened in pressing plate, the inside of first mounting hole is equipped with first installation slot, the lower portion of first installation slot is equipped with support device, the upper portion of first installation slot is equipped with heat sink, the inside of first installation slot is equipped with a plurality of line distribution device. The utility model provides a kind of distributed photovoltaic roof cable protection slot, by setting special heat sink, the iron plate of the device bottom can be in close contact with first installation slot, efficiently conducts heat, and the upper portion of heat dissipation fin greatly increases the contact area with air, realizes passive high-efficiency heat dissipation.

Description

Technical Field

[0001] This utility model relates to the field of cable protection technology, specifically to a cable protection trough for distributed photovoltaic rooftops. Background Technology

[0002] With the rapid development of distributed photovoltaic power generation technology, the installation volume of rooftop photovoltaic systems in industrial, commercial, and residential buildings is increasing day by day. As a key supporting component of photovoltaic systems, cable protection channels (also known as cable trays, junction boxes, or wiring ducts) undertake the important task of collecting, fixing, hiding, and protecting DC photovoltaic cables, and their performance directly affects the safety, reliability, and aesthetics of the system.

[0003] Currently, most rooftop photovoltaic cable protection channels on the market are made of metal (such as galvanized steel and aluminum alloy) or non-metallic (such as PVC and ABS plastic) materials. These traditional protection channels are mainly designed to provide mechanical protection for cables, neat and orderly wiring, and basic dustproof functions, but they have significant shortcomings in two key performance aspects: insufficient heat dissipation capacity and poor waterproof sealing. Utility Model Content

[0004] The present invention aims to solve the problems mentioned in the background art by providing a distributed photovoltaic roof cable protection groove.

[0005] The specific technical solution is as follows:

[0006] A distributed photovoltaic rooftop cable protection channel includes: a mounting plate, a support bridge fixedly connected to one side of the mounting plate, a pressure plate rotatably connected to the upper part of the support bridge, a first mounting hole on the pressure plate, a first mounting groove inside the first mounting hole, a support device at the lower part of the first mounting groove, a heat dissipation device at the upper part of the first mounting groove, a plurality of branching devices inside the first mounting groove, a second mounting groove on the upper part of the support bridge, a buffer layer bonded inside the second mounting groove, an extension plate fixedly connected to one end of the pressure plate, the extension plate being connected to the support bridge by bolts, and a waterproof adhesive layer on the upper part of the first mounting groove.

[0007] As a preferred embodiment of this utility model, the upper part of the support bridge is provided with a groove, and a magnet is bonded to the inside of the groove.

[0008] As a preferred embodiment of this utility model, the heat dissipation device includes heat dissipation fins, and an iron plate is fixedly connected to the lower part of the heat dissipation fins.

[0009] As a preferred embodiment of this utility model, the buffer layer is a rubber buffer pad, the upper part of the rubber buffer pad is provided with a striped groove, the mounting plate is provided with a second mounting hole, the mounting plate is welded with an angle iron, and end plates are provided on both sides of the second mounting groove.

[0010] As a preferred embodiment of this utility model, the first mounting hole is connected to the first strip groove on both sides, and the first mounting groove is fixedly connected to the strip block on both sides.

[0011] As a preferred embodiment of this utility model, a rectangular through hole is provided at the upper part of the first mounting groove, and the branching device includes a branching sleeve and a plug rod.

[0012] In a preferred embodiment of this utility model, an iron plate is fixedly connected to the top of the dividing sleeve, and the insertion rod is inserted into the rectangular through hole.

[0013] As a preferred embodiment of this utility model, the support device includes a bracket, and the lower part of the bracket is fixedly connected to a column and a mounting plate.

[0014] This utility model has the following beneficial effects:

[0015] 1. The distributed photovoltaic rooftop cable protection trough provided by this utility model, through the installation of a dedicated heat dissipation device, allows the bottom iron plate of which can make close contact with the first mounting groove, efficiently conducting heat. The upper heat dissipation fins greatly increase the contact area with the air, achieving passive and efficient heat dissipation. This structure can quickly conduct and dissipate the heat generated by the cables during operation, effectively reducing the operating temperature inside the trough and on the cables. This not only delays the aging of the cable insulation layer and extends its service life, but also reduces power loss caused by increased resistance, improves system power generation efficiency, and fundamentally eliminates the fire hazard caused by high temperature accumulation, significantly improving safety.

[0016] 2. A waterproof adhesive layer is applied to the upper part of the first mounting groove, forming a reliable and durable flexible sealing barrier that effectively prevents rainwater and dew from entering. Compared to traditional structures that rely solely on physical clips, this design offers superior waterproof sealing and can adapt to thermal expansion and contraction, making it less prone to failure over long-term use. Attached Figure Description

[0017] Figure 1 A first-view structural schematic diagram of the distributed photovoltaic roof cable protection groove provided in an embodiment of this utility model;

[0018] Figure 2 A second-view structural schematic diagram of the distributed photovoltaic roof cable protection groove provided in an embodiment of this utility model;

[0019] Figure 3A schematic diagram of the heat dissipation device structure of the distributed photovoltaic roof cable protection channel provided in an embodiment of this utility model;

[0020] Figure 4 A schematic diagram of the waterproof adhesive layer structure of the distributed photovoltaic roof cable protection groove provided in this embodiment of the utility model;

[0021] Figure 5 Distributed photovoltaic rooftop cable protection trough provided in this embodiment of the utility model Figure 4 Enlarged structural diagram at point A in the middle.

[0022] In the attached image:

[0023] 1. Angle iron; 2. Mounting plate; 3. Second mounting hole; 4. Pressure plate; 41. First mounting hole; 42. First strip groove; 43. Extension plate; 44. Bolt; 5. Support bridge; 51. End plate; 52. Second mounting groove; 53. Groove; 6. First mounting groove; 61. Strip block; 62. Rectangular through hole; 63. Waterproof adhesive layer; 7. Support device; 71. Bracket; 72. Mounting plate; 73. Column; 8. Heat dissipation device; 81. Heat dissipation fins; 82. Iron plate; 9. Branching device; 91. Branching sleeve; 92. Insert rod; 10. Buffer layer. Detailed Implementation

[0024] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0025] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual images. They should not be construed as limiting the scope of this application. To better illustrate the embodiments of this utility model, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0026] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this application. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0027] In the description of this utility model, unless otherwise explicitly specified and limited, the term "connection" or similar designation indicating the connection relationship between components should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] Example

[0029] The distributed photovoltaic rooftop cable protection channel provided in this embodiment, such as Figures 1-5 As shown, it includes: a mounting plate 2, a support bridge 5 fixedly connected to one side of the mounting plate 2, a pressure plate 4 rotatably connected to the upper part of the support bridge 5, a first mounting hole 41 opened on the pressure plate 4, a first mounting groove 6 provided inside the first mounting hole 41, a support device 7 provided at the lower part of the first mounting groove 6, a heat dissipation device 8 provided at the upper part of the first mounting groove 6, a plurality of branching devices 9 provided inside the first mounting groove 6, a second mounting groove 52 opened at the upper part of the support bridge 5, a buffer layer 10 bonded inside the second mounting groove 52, an extension plate 43 fixedly connected to one end of the pressure plate 4, the extension plate 43 being connected to the support bridge 5 by bolts 44, and a waterproof adhesive layer 63 provided at the upper part of the first mounting groove 6.

[0030] The upper part of the support bridge 5 has a groove 53, and a magnet is glued inside the groove 53.

[0031] The magnet uses magnetic force to simultaneously attract the iron plate 82 of the heat dissipation device 8 and the iron plate on top of the cable distribution sleeve 91. This design achieves contactless physical fixation of key components, ensuring that the heat dissipation device 8 is tightly attached to the cable and the cable distribution device 9 is stably suspended without the need for complex mechanical clips or screws. This greatly improves heat dissipation efficiency and ease of installation, while also preventing components from loosening due to vibration.

[0032] The heat dissipation device 8 includes heat dissipation fins 81, and an iron plate 82 is fixedly connected to the lower part of the heat dissipation fins 81.

[0033] The iron plate 82, acting as a heat-conducting medium, is directly or closely attached to the cable, efficiently absorbing the heat generated during operation. The heat is then rapidly conducted to the heat dissipation fins 81, which have a large surface area, and dissipated through natural convection with the air. This integrated "heat conduction + heat dissipation" design significantly reduces the operating temperature of the cable bundle, slows down cable aging, reduces power loss, and improves system safety and power generation efficiency.

[0034] The buffer layer 10 is a rubber buffer pad with a striped groove on the upper part. The mounting plate 2 has a second mounting hole 3 and an angle iron 1 is welded on it. The second mounting groove 52 has end plates 51 on both sides.

[0035] The grooved rubber cushioning pad effectively absorbs and buffers vibrations from the roof, such as wind vibrations, foot traffic, and thermal expansion and contraction stress, preventing internal cables from being worn or damaged. Angle iron 1 and the second mounting hole 3 form multiple mounting points, ensuring the rigidity and wind resistance of the protective groove on the roof. The end plates 51 on both sides seal the ports of the second mounting groove 52, enhancing the overall structure's sealing and dustproof / waterproof performance.

[0036] The first mounting hole 41 has a first strip groove 42 connected to both sides, and a strip block 61 is fixedly connected to both sides of the first mounting groove 6.

[0037] The first groove 42 cooperates with the strip block 61 to guide and position the pressure plate 4 when it is closed, ensuring that the pressure plate 4 is accurately pressed onto the top of the first mounting groove 6. This not only simplifies the installation process but also ensures that the waterproof adhesive layer 63 is uniformly compressed, achieving a comprehensive and reliable seal and preventing waterproofing failure due to misalignment.

[0038] The upper part of the first mounting groove 6 has a rectangular through hole 62, and the branching device 9 includes a branching sleeve 91 and a plug 92.

[0039] The rectangular through hole 62 provides a standardized installation position for the cable distribution device 9. After the plug 92 is inserted into the through hole, it can effectively prevent the cable distribution sleeve 91 from shifting or rotating during use, ensuring that the cables are permanently and orderly separated and managed, which greatly facilitates subsequent inspection, maintenance and troubleshooting.

[0040] A metal plate is fixedly connected to the top of the branch sleeve 91, and the insertion rod 92 is inserted into the rectangular through hole 62.

[0041] The iron plate at the top of the splitter sleeve 91 attracts the magnet in the groove 53, providing additional strong magnetic fixation on top of the physical positioning of the plug 92. This dual fixing method of "plug-in + magnetic attraction" greatly enhances the stability of the splitter device, ensuring that it remains firm in various environments, while allowing the cable to float and stay close to the top, optimizing the heat dissipation path.

[0042] The support device 7 includes a bracket 71, and a column 73 and a mounting plate 72 are fixedly connected to the lower part of the bracket 71.

[0043] The support device 7 forms the bottom load-bearing structure of the entire cable tray. The bracket 71 directly supports the cable tray, and its weight is transferred to the mounting plate 72 through the column 73, and then distributed to the foundation. This design keeps the cables off the bottom of the tray, avoiding potential contact with water, while also leaving air circulation space at the bottom of the cables, forming a double-sided heat dissipation pattern, further enhancing the overall heat dissipation effect.

[0044] In summary, the distributed photovoltaic rooftop cable protection channel provided in this embodiment has the following advantages:

[0045] The cables are installed one by one inside the split sleeve 91 and inside the first mounting groove 6. The plug rod 92 is inserted into the rectangular through hole 62. A magnet is glued inside the groove 53, which can attract the split sleeve 91 while attracting the iron plate 82, so that the cable is suspended and attached to the inner top of the first mounting groove 6, which facilitates heat dissipation through the heat dissipation device 8. The pressure plate 4 and the support bridge 5 play the role of fixing the first mounting groove 6, and the support device 7 plays the role of supporting the first mounting groove 6.

[0046] The working principle and implementation scheme of the distributed photovoltaic rooftop cable protection channel are as follows:

[0047] I. Working Principle

[0048] This protective channel is based on the core logic of "four-dimensional collaborative protection" and constructs an integrated technical system of "fixing-protection-heat dissipation-distribution" for the special operating environment of photovoltaic roof cables:

[0049] 1. Rigid fixing principle

[0050] The installation platform is mechanically fixed to the roof using a combination of mounting plates, angle iron, and anti-corrosion bolts, meeting the wind resistance design requirements for photovoltaic roofs (capable of withstanding wind loads of level 12 or higher). Simultaneously, the cable trays are further secured using pressure plates and extension plates to prevent structural loosening due to vibration. The connection method between the mounting plates and the roof is compatible with various roof types, including concrete and corrugated steel sheets, ensuring even load distribution (meeting the specification requirement of average load ≤ 150 kg / m²).

[0051] 2. Multi-layer protection principle

[0052] A composite protective structure consisting of a waterproof adhesive layer, a buffer layer, and end plate sealing is adopted. The waterproof adhesive layer is made of UV-resistant silicone material (meeting temperature cycling stability requirements of -30℃ to 80℃) to prevent rainwater intrusion. The buffer layer is made of EPDM rubber to absorb the stress caused by thermal expansion and contraction due to temperature changes, preventing the tank from cracking. The overall protection level must reach IP65 or higher, complying with the requirements for outdoor electrical equipment in the "Technical Specification for Safety Protection System of Photovoltaic Power Station" (GB / T35687).

[0053] 3. Passive heat dissipation principle

[0054] Heat conduction and radiation are achieved through "high thermal conductivity iron plate + fin array": the iron plate is directly attached to the surface of the cable (with thermal grease to reduce contact thermal resistance), and conducts the Joule heat of the photovoltaic cable during operation (especially in high-temperature environments in summer) to the fins; the fins increase the contact area with the air, accelerate natural convection heat dissipation, and ensure that the cable temperature does not exceed its temperature resistance limit (usually ≤90℃).

[0055] 4. Principle of Ordered Line Division

[0056] Based on the diverse specifications of photovoltaic cables (1.5mm²~35mm²), a replaceable branch sleeve and magnetic positioning structure are designed: the inner diameter of the sleeve matches the commonly used PV1-F DC cable specifications, and quick assembly is achieved by using the plug and magnet to attract the cable, avoiding local heat accumulation and insulation wear caused by multiple cables tangling, while also facilitating cable identification and fault diagnosis during operation and maintenance.

[0057] II. Implementation Path of the Solution

[0058] 1. Structural design optimization

[0059] Material selection: The heat dissipation iron plate is made of corrosion-resistant aluminum alloy (replacing ordinary steel plate), the branch sleeve is made of flame-retardant PP material (combustion performance meets GB8624 Class A non-combustible standard), and the buffer layer is made of weather-resistant EPDM rubber.

[0060] Size adaptation: The width of the groove (300-500mm is recommended) should be designed according to the number of photovoltaic array cables (usually 8-12 modules per string), and the spacing of the heat dissipation fins should be set to 10-15mm to balance heat dissipation efficiency and wind resistance.

[0061] Installation details: The perpendicularity error of the welding between the angle iron and the mounting plate is ≤1°, and the bolts are M8-M10 anti-corrosion bolts (compliant with GB / T3098.1 anti-corrosion standard) to ensure that they will not rust during long-term outdoor use.

[0062] 2. Enhanced environmental adaptability

[0063] Temperature-resistant design: The magnets are made of neodymium iron boron material that can withstand temperatures up to 120℃ to prevent magnetic attenuation caused by high temperatures on the roof in summer;

[0064] Waterproofing upgrade: A stainless steel pressure strip is added at the joint between the adhesive layer and the tank body to enhance the sealing reliability under rainwater erosion;

[0065] Vibration resistance optimization: The thickness of the buffer layer is designed to be 5-8mm according to the roof vibration frequency (usually ≤5Hz) to absorb the slight vibrations during the operation of the photovoltaic system.

[0066] 3. Standardized Implementation Process

[0067] According to the "Design Code for Cables in Power Engineering" (GB50217), the construction process includes: roof load assessment → positioning and layout → installation and fixing of uprights → trough assembly → waterproof adhesive layer laying → branch sleeve configuration → grounding test (grounding resistance ≤4Ω) to ensure reliable connection with the photovoltaic system lightning protection grounding network.

[0068] III. Deep Connection with Distributed Photovoltaic Rooftops

[0069] 1. Environmental adaptability association

[0070] In response to the outdoor environment of photovoltaic rooftops characterized by "strong ultraviolet radiation, large temperature differences, and high humidity," the material selection (weather-resistant adhesive, corrosion-resistant metal) and structural design (waterproofing and heat dissipation) of the protective trough directly meet the requirements of the "Design Code for Photovoltaic Power Generation Systems" (GB / T50673) for equipment environmental adaptability, solving the pain points of traditional cable troughs such as easy aging and insufficient heat dissipation.

[0071] 2. System security association

[0072] As a protective device for the "nerve center" of a photovoltaic system, its fire-retardant design (Class A materials), integrated lightning protection and grounding (connected to the roof grounding grid), and wind-resistant fixing scheme directly ensure the integrity of the cable insulation layer, reduce the risk of fire and electric shock caused by cable faults, and meet the electrical safety requirements of the "Technical Specification for Safety Protection System of Photovoltaic Power Station".

[0073] 3. Ease of operation and maintenance

[0074] The magnetic design of the branch sleeve and the modular structure of the trough are adapted to the operation and maintenance requirements of distributed photovoltaic "distributed layout and regular inspection": maintenance personnel can quickly detect the temperature of the cable through an infrared thermal imager (avoiding disassembly) and locate the fault point through the branch mark, which significantly improves the inspection efficiency required by the "Electric Power Safety Work Regulations" (DL / T5056).

[0075] 4. Compliance Related

[0076] The installation height (≤1.5m), load distribution (≤150kg / ㎡), and drainage design (not blocking the roof drain) of the protective trench fully comply with the Buildings Department's specifications for photovoltaic system support structures, ensuring the project passes acceptance.

[0077] In summary, through targeted principle design and engineering implementation, this protective channel has become a key supporting facility for the safe operation of distributed photovoltaic rooftops. It not only solves the pain point of outdoor cable protection, but also integrates into the photovoltaic system's full life cycle management system through standardized design.

[0078] The above are merely preferred embodiments of the present utility model and are not intended to limit the implementation methods and protection scope of the present utility model. Those skilled in the art should realize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A protective channel for distributed photovoltaic rooftop cables, characterized in that, include: Mounting plate (2), one side of which is fixedly connected to a support bridge (5), and the upper part of the support bridge (5) is rotatably connected to a pressure plate (4). The pressure plate (4) has a first mounting hole (41), the first mounting hole (41) has a first mounting groove (6) inside, the lower part of the first mounting groove (6) has a support device (7), the upper part of the first mounting groove (6) has a heat dissipation device (8), the interior of the first mounting groove (6) has several branching devices (9), the upper part of the support bridge (5) has a second mounting groove (52), the interior of the second mounting groove (52) has a buffer layer (10) bonded, one end of the pressure plate (4) is fixedly connected to an extension plate (43), the extension plate (43) is connected to the support bridge (5) by bolts (44), and the upper part of the first mounting groove (6) has a waterproof adhesive layer (63).

2. The distributed photovoltaic rooftop cable protection channel according to claim 1, characterized in that, The upper part of the support bridge (5) is provided with a groove (53), and a magnet block is bonded inside the groove (53).

3. The distributed photovoltaic rooftop cable protection channel according to claim 1, characterized in that, The heat dissipation device (8) includes heat dissipation fins (81), and an iron plate (82) is fixedly connected to the lower part of the heat dissipation fins (81).

4. The distributed photovoltaic rooftop cable protection channel according to claim 1, characterized in that, The buffer layer (10) is a rubber buffer pad. The upper part of the rubber buffer pad is provided with a striped groove. The mounting plate (2) is provided with a second mounting hole (3). An angle iron (1) is welded on the mounting plate (2). End plates (51) are provided on both sides of the second mounting groove (52).

5. The distributed photovoltaic rooftop cable protection channel according to claim 1, characterized in that, The first mounting hole (41) is connected to the first strip groove (42) on both sides, and the first mounting groove (6) is fixedly connected to the strip block (61) on both sides.

6. The distributed photovoltaic rooftop cable protection channel according to claim 1, characterized in that, The upper part of the first mounting groove (6) is provided with a rectangular through hole (62), and the splitting device (9) includes a splitting sleeve (91) and a plug (92).

7. The distributed photovoltaic rooftop cable protection channel according to claim 6, characterized in that, The top of the dividing sleeve (91) is fixedly connected to an iron plate, and the insert rod (92) is inserted into the rectangular through hole (62).

8. The distributed photovoltaic rooftop cable protection channel according to any one of claims 1-7, characterized in that, The support device (7) includes a bracket (71), and the lower part of the bracket (71) is fixedly connected to a column (73) and a mounting plate (72).

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