Cable bending limiting device for photovoltaic junction box

Abstract

The utility model discloses a photovoltaic junction box cable bending limiting device, and particularly relates to the technical field of photovoltaic junction boxes, the photovoltaic junction box cable bending limiting device comprises a main shell, an auxiliary shell and an anti-bending assembly, a photovoltaic connecting mechanism is arranged at the center of an inner cavity of the main shell, and cables are arranged at the two ends of the lower portion of the photovoltaic connecting mechanism; the auxiliary shell is arranged on the left side of the main shell, and the anti-bending assembly is arranged below the main shell; according to the utility model, the distance between the joints of the two groups of cables is kept stable through the anti-bending assembly, mutual interference between the cables can be effectively avoided, mutual entanglement, extrusion or intersection between the cables can be prevented, the breakdown phenomenon can be prevented, and the two groups of cables are connected and fixed, so that the service life of the cable is prolonged. According to the junction box, multi-angle bending at the connecting position of the cable and the diode can be effectively avoided, the situation of uneven stress at the connecting position of the cable is reduced, the torsion resistance of the cable is improved, normal work of the cable is ensured, and the movement range of the cable in the inner cavity of the junction box is effectively limited through the cable fixing holes.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic junction boxes, and more specifically, the utility model relates to a photovoltaic junction box cable bending limiting device. Background Art

[0002] A photovoltaic junction box is a connecting device between a solar cell array composed of solar cell modules and a solar charging control device. Its main function is to connect and protect solar photovoltaic modules, connect the electricity generated by solar cells to external circuits, and conduct the current generated by the photovoltaic modules;

[0003] After retrieval, the existing patent (publication number: CN111245361A) discloses a photovoltaic junction box with an improved cable fixing device, including a junction box body, a cable fixing seat, a pressing block and a cable. The inside of the cable fixing seat is provided with a positioning inner wall, a positioning boss and a first cable fixing cavity. The positioning inner wall is provided with a first positioning groove, and the positioning boss is provided with a second positioning groove. The pressing block has opposite side walls, a bottom wall and a second cable fixing cavity. The side wall is provided with a first positioning block, and the bottom wall is provided with a second positioning block. The second cable fixing cavity and the first cable fixing cavity form a cylindrical channel matching the diameter of the cable. This invention uses the pressing block to press the cable into the cable fixing seat, and then uses the ultrasonic process to tightly connect the pressing block and the cable fixing seat to achieve the purpose of firmly fixing the cable. This invention has simple operation and convenient positioning, and can reduce the risk of cable loosening. The inventor found the following problems in the process of implementing this utility model:

[0004] In the existing photovoltaic junction boxes, when the distance between the cable connection areas is too close, after being affected by external forces, the cables will be squeezed against each other, and it is easy to entangle with each other. Moreover, the cables will be stressed against each other, causing the cables to be twisted, bent or damaged. And the external force will be transmitted to the cable connection in the inner cavity of the junction box, easily resulting in the cables being squeezed, twisted or stressed unevenly inside the junction box. Therefore, when using a photovoltaic junction box cable bending limiting device, it is necessary to keep the distance between the cable connections stable and limit the movement range of the cables in the inner cavity of the junction box;

[0005] Therefore, a photovoltaic junction box cable bending limiting device is proposed for the above problems. Summary of the Utility Model

[0006] In order to overcome the above defects of the prior art, the utility model provides a photovoltaic junction box cable bending limiting device to solve the problems raised in the above background art.

[0007] To achieve the above object, the present utility model provides the following technical solution: A photovoltaic junction box cable bending limiting device, comprising a main housing, a sub-housing and an anti-bending component. A photovoltaic connection mechanism is arranged at the center of the inner cavity of the main housing. Wires are arranged at both ends below the photovoltaic connection mechanism. The sub-housing is arranged on the left side of the main housing, and the anti-bending component is arranged below the main housing;

[0008] The anti-bending component includes a wire protection sleeve. The wire protection sleeve is arranged on the outer surface of the lower end of the wire. There are four groups of wire protection sleeves. A wire groove is opened in the inner cavity of the wire protection sleeve. Connecting rods are welded between every two groups of wire protection sleeves. Installation holes are arranged on one side of two groups of wire protection sleeves, and bolts are arranged in the inner cavities of the installation holes.

[0009] Preferably, the main housing and the sub-housing jointly form a junction box structure. The main housing and the sub-housing are movably connected through a first hinge. A limiting block is arranged on the right side of the main housing, and a buckle is arranged on the left side of the sub-housing.

[0010] Preferably, fixing plates are welded in the inner cavities at the lower ends of the main housing and the sub-housing. Fixing holes are opened at both ends of the fixing plates. Cable locks are arranged on both sides at the lower end of the main housing.

[0011] Preferably, there are two groups of the buckles and the limiting blocks. Each group of buckles is buckled with the limiting block.

[0012] Preferably, two groups of the wire protection sleeves are movably connected to the other two groups of wire protection sleeves through a rotating shaft, and two groups of the wire protection sleeves are respectively abutted against the other two groups of wire protection sleeves.

[0013] Preferably, one side of the opposite surfaces of the two fixing plates abuts against each other, and the positions of every two groups of fixing holes correspond to each other.

[0014] The technical effects and advantages of the present utility model:

[0015] 1. Compared with the prior art, the photovoltaic junction box cable bending limiting device enables the distance between the connections of the two wires to remain stable through the anti-bending component, can effectively avoid the mutual interference between the wires, prevent the wires from being entangled, squeezed or crossed with each other, prevent the occurrence of breakdown phenomenon, connect and fix the two wires, can effectively avoid the multi-angle bending at the connection of the wire and the diode, reduce the uneven force at the connection of the wire, improve the anti-torsion performance of the wire, and ensure the normal operation of the wire.

[0016] 2. Compared with the prior art, the cable bending limiting device of the photovoltaic junction box can fix the position through the wire fixing holes in the inner cavities of the main housing and the sub-housing, effectively limiting the movement range of the cables in the inner cavity of the junction box, enabling the cables to only pass through within fixed paths and positions, and reducing the extrusion of the cables in the inner cavity of the junction box, protecting the cable connection from external forces. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front view structural schematic diagram of the overall unfolding of the present utility model.

[0018] Figure 2 It is a three-dimensional structural schematic diagram of the main housing and the sub-housing of the present utility model.

[0019] Figure 3 It is a front view structural schematic diagram of the anti-bending component of the present utility model when unfolded.

[0020] Figure 4 It is a right view structural schematic diagram of the bolt of the present utility model.

[0021] The reference numerals are: 1. Main housing; 2. Photovoltaic connection mechanism; 3. Cable; 4. Sub-housing; 5. First hinge; 6. Cable lock; 7. Anti-bending component; 701. Cable protection housing; 702. Wire groove; 703. Connecting rod; 704. Mounting hole; 705. Bolt; 8. Buckle; 9. Limiting block; 10. Wire fixing plate; 11. Wire fixing hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0023] Embodiment 1

[0024] As shown in the attached Figures 1 to 4 A cable bending limiting device for a photovoltaic junction box includes a main housing 1, a sub-housing 4 and an anti-bending component 7. A photovoltaic connection mechanism 2 is provided at the center of the inner cavity of the main housing 1. Cables 3 are provided at both ends below the photovoltaic connection mechanism 2. The sub-housing 4 is provided on the left side of the main housing 1, and the anti-bending component 7 is provided below the main housing 1;

[0025] The anti-bending component 7 includes a wire protection housing 701 which is arranged on the outer surface of the lower end of the cable 3. There are four groups of the wire protection housings 701. A wire groove 702 is formed in the inner cavity of the wire protection housing 701. A connecting rod 703 is welded between every two groups of the wire protection housings 701. Mounting holes 704 are arranged on one side of two of the wire protection housings 701, and bolts 705 are arranged in the inner cavities of the mounting holes 704.

[0026] Among them: When the cable 3 passes through the main housing 1, it is protected by the anti-bending component 7. Two of the wire protection housings 701 are connected by the connecting rod 703, and the other two are the same, so as to be sleeved on the outer surfaces of the two cables 3. The cable 3 abuts against the wire groove 702 in the inner cavity of the wire protection housing 701. Then, after the installation is completed, the four wire protection housings 701 are fixed on the surface of the cable 3 by the bolts 705 passing through the two mounting holes 704, so that the bending of the cable 3 can be effectively restricted, the distance between the two connection points of the cable 3 can be kept stable, the pulling or compression between the cables 3 can be avoided, and the distance between the two cables 3 can be stably maintained by the connecting rod 703, so as to effectively prevent the entanglement, extrusion or crossing between the cables 3, keep the spatial separation of the cables 3, and avoid the mutual interference between the cables 3.

[0027] Embodiment 2

[0028] On the basis of Embodiment 1, the solution in Embodiment 1 is further refined and introduced in combination with the following specific working modes, as Figures 1 to 4 shown, and the details are described below:

[0029] As a preferred implementation mode, the main housing 1 and the auxiliary housing 4 together form a wiring box structure, and the main housing 1 and the auxiliary housing 4 are movably connected by a first hinge 5. A limiting block 9 is arranged on the right side of the main housing 1, and a buckle 8 is arranged on the left side of the auxiliary housing 4. There are two groups of both the buckle 8 and the limiting block 9, and each group of the buckle 8 is buckled with the limiting block 9; further, the main housing 1 and the auxiliary housing 4 are movably connected by the first hinge 5 on the same side, and then on the other side, the buckle 8 of the auxiliary housing 4 is buckled on the outer surface of the limiting block 9, so as to install the main housing 1 and the auxiliary housing 4.

[0030] As a preferred embodiment, wire fixing plates 10 are welded to the inner cavities at the lower ends of the main housing 1 and the auxiliary housing 4. Wire fixing holes 11 are formed at both ends of the wire fixing plates 10. One side of the opposite surfaces of the two wire fixing plates 10 abuts against each other, and the positions of every two wire fixing holes 11 correspond to each other. Cable locks 6 are arranged on both sides at the lower end of the main housing 1; further, when the cable 3 is connected to the photovoltaic connection mechanism and passes through the cable locks 6, since the main housing 1 and the auxiliary housing 4 are installed as a whole, the two wire fixing plates 10 abut against each other, and the cable 3 will pass through the two wire fixing holes 11 and then enter the cable locks 6, so that the movement range of the cable 3 in the inner cavity of the junction box can be effectively restricted, and the cable 3 can only pass through in a fixed path and position.

[0031] As a preferred embodiment, two of the cable protection sleeve shells 701 are movably connected to the other two cable protection sleeve shells 701 through a rotating shaft, and two of the cable protection sleeve shells 701 abut against the other two cable protection sleeve shells 701 respectively; further, two of the cable protection sleeve shells 701 abut against the other two cable protection sleeve shells 701, so as to be combined and sleeved on the outer surfaces of the two cables 3, and are restricted and connected through the two connecting rods 703 to maintain a relatively stable distance.

[0032] The working process of the present utility model is as follows: One side of the main housing 1 and the auxiliary housing 4 is movably connected through the first hinge 5, and then on the other side, the auxiliary housing 4 is buckled on the outer surface of the limit block 9 through the buckle 8, so as to install the main housing 1 and the auxiliary housing 4, thus forming a set of junction box structures. When the cable 3 is connected to the photovoltaic connection mechanism 2 and passes through the cable locks 6, since the main housing 1 and the auxiliary housing 4 are installed as a whole, the two wire fixing plates 10 abut against each other, and the cable 3 will pass through the two wire fixing holes 11 and then enter the cable locks 6, so that the movement range of the cable 3 in the inner cavity of the junction box can be effectively restricted, and the cable 3 can only pass through in a fixed path and position.

[0033] When the cable 3 passes through the cable locks 6 subsequently, it is protected by the anti-bending assembly 7. Two of the cable protection sleeve shells 701 are connected through the connecting rod 703, and the other two are the same, so as to be sleeved on the outer surfaces of the two cables 3. The cable 3 abuts against the wire grooves 702 in the inner cavity of the cable protection sleeve shell 701. After the installation is completed, the four cable protection sleeve shells 701 are fixed on the surface of the cable 3 by bolts 705 passing through the two mounting holes 704, so as to be combined and sleeved on the outer surfaces of the two cables 3, and are restricted and connected through the two connecting rods 703 to keep the two cables 3 at a relatively stable distance. The above is the working principle of the photovoltaic junction box cable bending limiting device.

[0034] Finally: The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A photovoltaic junction box cable bending limiting device, comprising a main housing (1), a secondary housing (4) and an anti-bending component (7), characterized in that: A photovoltaic connection mechanism (2) is arranged at the center of the inner cavity of the main shell (1), cables (3) are arranged at both ends below the photovoltaic connection mechanism (2), the auxiliary shell (4) is arranged on the left side of the main shell (1), and the anti-bending component (7) is arranged below the main shell (1); The anti-bending component (7) comprises a wire protection shell (701), the wire protection shell (701) is arranged on the outer surface of the lower end of the cable (3), four groups of the wire protection shell (701) are arranged, the inner cavity of the wire protection shell (701) is provided with a wire groove (702), a connecting rod (703) is welded between every two groups of the wire protection shell (701), wherein one side of the two groups of the wire protection shell (701) is provided with a mounting hole (704), and the inner cavity of the mounting hole (704) is provided with a bolt (705).

2. A photovoltaic junction box cable bending limiting device according to claim 1, characterized in that: The main housing (1) and the auxiliary housing (4) together form a set of junction box structures, and the main housing (1) and the auxiliary housing (4) are movably connected via a first hinge (5), and a limit block (9) is provided on the right side of the main housing (1), and a buckle (8) is provided on the left side of the auxiliary housing (4).

3. A photovoltaic junction box cable bending limiting device according to claim 2, characterized in that: A wire fixing plate (10) is welded to the inner cavities at the lower ends of the main shell (1) and the auxiliary shell (4), wire fixing holes (11) are provided at both ends of the wire fixing plate (10), and cable lock buckles (6) are provided on both sides of the lower end of the main shell (1).

4. A photovoltaic junction box cable bending limiting device according to claim 2, characterized in that: The buckles (8) and the limit blocks (9) are provided in two groups, and each group of the buckles (8) is mutually engaged with the limit blocks (9).

5. A photovoltaic junction box cable bending limiting device according to claim 1, characterized in that: Two of the groups of wire protection shells (701) are movably connected to the other two groups of wire protection shells (701) via rotating shafts, and two of the groups of wire protection shells (701) are respectively in contact with the other two groups of wire protection shells (701).

6. A photovoltaic junction box cable bending limiting device according to claim 3, characterized in that: One side of the opposite surfaces of the two groups of wire fixing plates (10) abut against each other, and the positions of each two groups of wire fixing holes (11) correspond to each other.

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