A type of cable protection sleeve between photovoltaic module panels

Abstract

A protective sleeve for cables between photovoltaic (PV) modules is designed to address the issue of cable damage in outdoor windy environments. The sleeve consists of two semi-circular sleeve pieces connected by slots and rails, with suction cups on the side walls for attachment to the PV support. One end connects to a conical head with multi-layered waterproof pads, and the other end connects to a corrugated pipe; the two are detachably connected via a fastener with flexible padding. All components are designed for easy installation and maintenance. The corrugated pipe provides flexible buffering and absorbs vibration energy, the conical head provides a waterproof seal, and the suction cups replace traditional binding, effectively preventing cable damage from vibration bending, friction wear, and rainwater erosion. This improves the stability and lifespan of the PV system. The sleeve is simple in structure and highly practical.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic power generation technology, and in particular to a protective sleeve for cables between photovoltaic module panels. Background Technology

[0002] In solar photovoltaic (PV) power generation systems, PV modules are typically mounted in arrays on PV mounting structures, with cables between the modules responsible for transmitting electrical signals. With the increasing scale of PV power plants, the impact of wind loads on cables in outdoor environments is becoming increasingly prominent: when wind acts on the PV modules, the vibration of the modules is transmitted to the connection points through the cables. Existing protective structures often suffer from the following defects, leading to cable damage: 1. Traditional cable protection sleeves mostly adopt a rigid structure, which cannot effectively buffer high-frequency vibrations caused by wind. The interface between the cable and the protection sleeve is prone to metal fatigue fracture due to repeated bending. 2. Conventional binding and fixing methods are prone to loosening under long-term wind force, leading to friction and wear between the cable and the bracket, which is one of the main causes of cable failure; 3. Wind-driven rainwater can easily seep in through the seams of the protective sleeve. Existing sealing structures are prone to displacement of the sealing gaskets under vibration, often causing cable short circuits and other faults due to wind and rain erosion. Summary of the Invention

[0003] In view of the technical problems existing in the background technology, the present invention provides a combined cable protection sleeve structure: the flexible buffer design of the corrugated pipe absorbs the wind vibration energy; the multi-layer waterproof gasket of the conical head forms a dynamic sealing system, which can still maintain good waterproof performance under wind vibration conditions; the suction cup adsorption fixation replaces the traditional binding, so that the protective sleeve and the photovoltaic bracket form a rigid connection, which significantly improves the wind load resistance.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A protective sleeve for cables between photovoltaic modules includes a protective sleeve, a corrugated pipe, and a tapered head. The photovoltaic modules are installed side by side on a photovoltaic support. The protective sleeve is installed at the end of the photovoltaic support. The cables of the photovoltaic modules are laid along the photovoltaic support and pass through the protective sleeve.

[0005] In a preferred embodiment, one end of the protective sleeve is threaded to a tapered head, and the other end is connected to a bellows. The bellows is detachably connected to the end of the protective sleeve via a fastener.

[0006] In a preferred embodiment, the protective sleeve is composed of two semi-circular sleeve splicing parts; one side of the sleeve splicing part is provided with a slot, and the other side is provided with a corresponding slot rail, and the sleeve splicing parts are assembled by interlocking with each other through the slot rail and the slot.

[0007] In a preferred embodiment, the conical head is assembled from two conical splicing pieces, which are joined together to form the conical head and clamp the cable at the axis.

[0008] In a preferred embodiment, the ends of the tapered splicing parts can be spliced ​​to form a threaded joint, and the end of the protective sleeve is correspondingly provided with an internal thread and is threadedly connected to the threaded joint.

[0009] In the preferred embodiment, the inner wall of the tapered splice is provided with multiple layers of waterproof pads.

[0010] In a preferred embodiment, a side plate is provided on the side wall of the sleeve splicing component, and suction cups are equidistantly arranged on the side plate. After the sleeve splicing component is assembled, it is adsorbed and connected to the photovoltaic bracket through the suction cups.

[0011] In the preferred embodiment, the corrugated pipe is made by splicing the left and right halves together, and the cable is clamped at the axis.

[0012] In a preferred embodiment, the fastener includes two fastening splicing components, left and right. The fastening splicing components have ear plates vertically arranged on their sides, and the ear plates have connecting holes. Connecting bolts pass through the connecting holes, so that the fastening splicing components clamp and fix the ends of the corrugated pipe and the protective sleeve.

[0013] In a preferred embodiment, a flexible pad is provided on the inner side of the fixed splice, and the flexible pad is placed at the connection between the corrugated pipe and the fixed splice.

[0014] A protective sleeve for cables between photovoltaic module panels. This patent can achieve the following beneficial effects in actual use: 1. In terms of vibration protection, the flexible buffer design of the corrugated pipe can effectively absorb the vibration energy of the photovoltaic module under the action of wind, significantly reduce the bending stress at the interface between the cable and the protective sleeve, and greatly reduce the risk of metal fatigue fracture. 2. In terms of the fixed structure, the sleeve splicing component is attached to the photovoltaic bracket by suction cup. Compared with the traditional binding method, the wind load resistance is significantly enhanced and it is not easy to loosen after long-term use, thus avoiding friction and wear between the cable and the bracket from the source. 3. The waterproof sealing performance is enhanced. The multi-layer waterproof gaskets on the inner wall of the conical head form a dynamic sealing system. Even under wind and vibration conditions, it can still maintain a good waterproof effect and effectively prevent cable short circuit faults caused by wind and rain erosion. 4. In terms of the convenience of structural design, the protective sleeve adopts the plug-in assembly form of slot and rail, the conical head is connected to the protective sleeve by thread, and the corrugated pipe is detachably connected to the protective sleeve by means of fasteners. The overall structure is convenient for installation, debugging and later maintenance and repair. 5. The flexible pads on the inner side of the fixed splice can act as a buffer when clamping the corrugated tube, avoiding hard compression that could damage the outer layer of the cable, and further improving the overall protective performance of the protective sleeve. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram showing the overall structure and installation effect of this utility model; Figure 2 This is an exploded view of the overall structure of this utility model; Figure 3 This is an anatomical diagram of the protective sleeve structure of this utility model; Figure 4 This is a structural diagram of the fixing device of this utility model; Figure 5 This is a schematic diagram of the corrugated pipe and fastener structure of this utility model; Figure 6 This is the internal structure of the conical splicing component of this utility model.

[0016] In the diagram: 1. Photovoltaic bracket; 2. Photovoltaic module; 3. Protective sleeve; 301. Sleeve splice; 302. Slot; 303. Rail; 304. Side plate; 305. Suction cup; 306. Internal thread; 4. Cable; 5. Corrugated pipe; 6. Fixing component; 601. Fixing splice; 602. Ear plate; 603. Connecting bolt; 604. Flexible pad; 605. Connecting hole; 7. Conical head; 701. Conical splice; 702. Threaded joint; 703. Waterproof gasket. Detailed Implementation

[0017] like Figure 1 As shown, a protective sleeve for cables between photovoltaic modules includes a protective sleeve 3, a corrugated pipe 5, and a tapered head 7. Photovoltaic modules 2 are mounted side-by-side on a photovoltaic support 1. The protective sleeve 3 is installed at the end of the photovoltaic support 1. Cables 4 of the photovoltaic modules 2 are laid along the photovoltaic support 1 and pass through the protective sleeve 3. In actual installation, cables 4 can first pass through the pre-reserved channel in the protective sleeve 3 before making electrical connections with the photovoltaic modules 2 and other equipment, ensuring neat cable routing and facilitating subsequent maintenance. The protective sleeve 3 is made of flame-retardant PVC material, which can withstand outdoor high temperature and ultraviolet radiation environments, extending its service life.

[0018] Preferred solutions include Figure 2 As shown, one end of the protective sleeve 3 is threadedly connected to the tapered head 7, and the other end is connected to the corrugated pipe 5. The corrugated pipe 5 is detachably connected to the end of the protective sleeve 3 via a fixing member 6. The threaded connection uses a standard metric thread with a pitch of 1.5mm to ensure a tight connection and easy disassembly. During installation, first, insert one end of the corrugated pipe 5 into the end of the protective sleeve 3, and then use the fixing member 6 to clamp the two from both sides. The diameter of the connecting hole 605 on the ear plate 602 of the fixing member 6 is matched with the connecting bolt 603 to ensure a secure fixation. During disassembly, simply unscrew the connecting bolt 603 to separate the corrugated pipe 5 from the protective sleeve 3, facilitating the inspection and replacement of the cable 4.

[0019] Preferred solutions include Figure 3 As shown, the protective sleeve 3 is composed of two semi-circular sleeve splicing pieces 301. One side of each sleeve splicing piece 301 has a slot 302, and the other side has a corresponding rail 303. The sleeve splicing pieces 301 are assembled by interlocking the rail 303 and the slot 302. The slot 302 is 8mm deep, and the rail 303 is 10mm wide; their dimensions are precisely matched to ensure a seamless connection. During installation, the two sleeve splicing pieces 301 are brought together from both sides of the cable 4 towards the center, allowing the rail 303 to embed into the slot 302, completing quick assembly. The inner wall of the sleeve splicing piece 301 is smooth, preventing scratches to the outer sheath of the cable 4.

[0020] Preferred solutions include Figure 6 As shown, the conical head 7 is assembled from two conical splicing parts 701. The conical splicing parts 701 are spliced ​​together to form the conical head 7, which clamps the cable 4 at the axis. The conical splicing parts 701 adopt a split design, with an arc-shaped groove on the inner wall that fits the circular cross-section of the cable 4, which can evenly distribute the clamping force. During assembly, the cable 4 is placed between the two conical splicing parts 701, and the threaded connector 702 at the end is tightened after splicing to make the conical head 7 tightly wrap around the cable 4 and prevent it from shaking.

[0021] Preferred solutions include Figure 6 As shown, the ends of the tapered connector 701 can be spliced ​​to form a threaded joint 702. The end of the protective sleeve 3 is correspondingly provided with an internal thread 306, which is threadedly connected to the threaded joint 702. The fitting accuracy between the threaded joint 702 and the internal thread 306 reaches 6H / 6g, ensuring a firm connection and waterproof and dustproof performance. When installing the tapered head 7, first align the threaded joint 702 with the internal thread 306 at the end of the protective sleeve 3, and tighten it clockwise. Sealant can be applied at the connection to further enhance the sealing performance.

[0022] Preferred solutions include Figure 6 As shown, the inner wall of the tapered splice 701 is provided with multiple layers of waterproof gaskets 703. The waterproof gaskets 703 are made of EPDM rubber, which has good weather resistance and elasticity. The multiple layers of gaskets are distributed in a stepped manner, with each layer being 2mm thick. When the tapered splice 701 clamps the cable 4, the gaskets will tightly adhere to the surface of the cable, effectively preventing rainwater and moisture from entering, and ensuring the insulation performance of the cable 4 even in strong winds and heavy rain.

[0023] Preferred solutions include Figure 4As shown, a side plate 304 is provided on the side wall of the sleeve splicing component 301. Suction cups 305 are equidistantly arranged on the side plate 304. After assembly, the sleeve splicing component 301 is adsorbed and connected to the photovoltaic bracket 1 via the suction cups 305. The suction cups 305 are made of silicone and have a diameter of 30mm. Each sleeve splicing component 301 has three suction cups 305 arranged in an equilateral triangle to ensure uniform adsorption force. During installation, the surface of the photovoltaic bracket 1 is first cleaned, and then the suction cups 305 are pressed onto the bracket to expel internal air and form a vacuum adsorption, thus firmly fixing the protective sleeve 3 and enabling it to withstand strong winds.

[0024] Preferred solutions include Figure 5 As shown, the corrugated pipe 5 is composed of two halves joined together, with the cable 4 clamped at the center. The corrugated pipe 5 is made of PE material, possessing good flexibility and anti-aging properties. Its corrugated structure effectively absorbs vibration. A sealing strip is installed at the joint of the two corrugated pipe halves. During assembly, the cable 4 is placed in the middle, and after the two halves are fastened together, they are pressed together by the fastener 6. The sealing strip will fit tightly, preventing foreign objects from entering and enhancing vibration resistance.

[0025] Preferred solutions include Figure 5 As shown, the fixing component 6 includes two fixing splicing components 601, one on the left and one on the right. Ear plates 602 are vertically arranged on the sides of each fixing splicing component 601. Connecting holes 605 are provided on the ear plates 602, and connecting bolts 603 pass through the connecting holes 605, allowing the fixing splicing component 601 to clamp and fix the ends of the corrugated pipe 5 and the protective sleeve 3. The fixing splicing component 601 is made of aluminum alloy, which is lightweight and has high strength. The ear plates 602 are 5mm thick, and the connecting holes 605 are 8mm in diameter, used in conjunction with M8 connecting bolts 603. During installation, the fixing splicing component 601 is placed on both sides of the connection between the corrugated pipe 5 and the protective sleeve 3, the connecting bolts 603 are inserted, and the nuts are tightened. By adjusting the tightening torque, the fixing component 6 applies a suitable clamping force to the corrugated pipe 5 and the protective sleeve 3, ensuring a stable connection without damaging the components.

[0026] Preferred solutions include Figure 5 As shown, a flexible pad 604 is provided on the inner side of the fixing splice 601. The flexible pad 604 is placed at the connection between the corrugated pipe 5 and the fixing splice 601. The flexible pad 604 is made of EVA foam with a thickness of 3mm, and has a soft surface and a certain degree of elasticity. When the fixing member 6 is clamped, the flexible pad 604 fills the gap, preventing the fixing splice 601 from making direct hard contact with the corrugated pipe 5, preventing the corrugated pipe 5 from deforming or being scratched due to force, and also playing a role in buffering and sealing; and when the cable 4 swings with the corrugated pipe 5, it also helps to reduce hard friction.

[0027] The above embodiments are merely preferred technical solutions of this utility model and should not be considered as limitations on this utility model. The protection scope of this utility model should be the technical solution described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the protection scope of this utility model.

Claims

1. A protective sleeve for cables between photovoltaic module panels, comprising a protective sleeve (3), a corrugated tube (5), and a tapered head (7), characterized in that: Photovoltaic modules (2) are installed side by side on photovoltaic brackets (1). Protective sleeves (3) are installed at the ends of the photovoltaic brackets (1). Cables (4) of the photovoltaic modules (2) are laid along the photovoltaic brackets (1) and pass through the protective sleeves (3).

2. The photovoltaic module inter-string cable protection sleeve of claim 1, wherein: One end of the protective sleeve (3) is threaded to the tapered head (7), and the other end is connected to the bellows (5). The bellows (5) is detachably connected to the end of the protective sleeve (3) through the fastener (6).

3. The photovoltaic module inter-string cable protection sleeve of claim 2, wherein: The protective sleeve (3) is made up of two semi-circular sleeve splicing parts (301); one side of the sleeve splicing part (301) is provided with a slot (302), and the other side is provided with a corresponding rail (303). The sleeve splicing part (301) is assembled by interlocking with the rail (303) and the slot (302).

4. The photovoltaic module inter-string cable protection sleeve of claim 2, wherein: The conical head (7) is assembled from two conical splicing parts (701), which are spliced ​​together to form the conical head (7) and clamp the cable (4) at the axis.

5. The photovoltaic module inter-string cable protection sleeve of claim 4, wherein: The ends of the tapered splice (701) can be spliced ​​to form a threaded joint (702), and the end of the protective sleeve (3) is provided with an internal thread (306) and is threadedly connected to the threaded joint (702).

6. The photovoltaic module inter-string cable protection sleeve of claim 4, wherein: The inner wall of the tapered splice (701) is provided with multiple layers of waterproof gaskets (703).

7. The photovoltaic module inter-string cable protection sleeve of claim 3, wherein: A side plate (304) is provided on the side wall of the sleeve splicing component (301), and suction cups (305) are provided at equal intervals on the side plate (304). After the sleeve splicing component (301) is assembled, it is adsorbed and connected to the photovoltaic bracket (1) through the suction cups (305).

8. The photovoltaic module inter-string cable protection sleeve of claim 2, wherein: The corrugated pipe (5) is made by splicing the left and right halves together, and the cable (4) is clamped at the axis.

9. The photovoltaic module inter-string cable protection sleeve of claim 2, wherein: The fastener (6) includes two fasteners (601) on the left and right. The fastener (601) has a vertically arranged ear plate (602) on its side. The ear plate (602) has a connecting hole (605). The connecting bolt (603) passes through the connecting hole (605) so that the fastener (601) clamps and fixes the ends of the corrugated pipe (5) and the protective sleeve (3).

10. The photovoltaic module inter-string cable protection sleeve of claim 9, wherein: A flexible pad (604) is provided on the inner side of the fixed splice (601), and the flexible pad (604) is placed at the connection between the corrugated pipe (5) and the fixed splice (601).

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