Photovoltaic junction box capable of preventing layering of pouring sealant and cable

Abstract

The utility model relates to an improved photovoltaic junction box structure capable of preventing layering of pouring sealant and cables. Relates to the technical field of photovoltaic junction boxes. Comprising a box body, the end part of which is provided with a cable wiring port with an open semicircular groove-shaped structure; a fixedly connected lower semicircular pressing ring is arranged in the cable wiring port; a pair of first lower pressing ribs which are fixedly arranged at an interval are arranged on the side part of the lower semicircular pressing ring; the pair of second lower pressing ribs are fixedly arranged on the inner side of the first lower pressing rib and are matched with the cable; the gland is provided with an upper semicircular pressing ring matched with the lower semicircular pressing ring, a first upper pressing rib matched with the first lower pressing rib and a second upper pressing rib matched with the second lower pressing rib. According to the utility model, when the cable is bent, the cable in the cable box is prevented from greatly deforming, and the risk of layering of the pouring sealant and the cable sheath is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic junction boxes, in particular to a structural improvement of a photovoltaic junction box that prevents delamination of potting glue and cables. Background Art

[0002] A photovoltaic junction box is a connection device between a solar cell array and a solar charging control device. Its primary function is to connect and protect solar photovoltaic modules, connect the electricity generated by the solar cells to external circuits, and conduct the current generated by the modules. Cables are connected to both ends of the photovoltaic junction box, which transmit current in both input and output directions. However, existing photovoltaic junction boxes often twist and rotate during use, causing the cable connections inside the junction box to become detached. Therefore, a cable anti-rotation structure is needed to prevent the cable from becoming detached at the junction inside the junction box due to radial rotation of the cable itself.

[0003] In response to this type of problem, in the existing technology, such as the "Photovoltaic Junction Box Cable Anti-Rotation Structure" authorized on September 18, 2020, with application number 2020204923261, it includes a cable interface and a pressure block. The cable interface is an open semicircular groove structure. The cable passes through the cable interface and is fixed inside the junction box. The pressure block is installed above the cable and

[0004] The cable pressing block includes an extrusion surface, a grooved arc surface, and fixed barbs, which are long strips extending along the cable. During installation, the barbs penetrate the cable's sheath and are parallel to the cable's direction, preventing radial rotation and displacement.

[0005] The design structure in the prior art mainly has the following problems during preparation and use:

[0006] 1. The fixed thorns are subject to factors such as mold processing accuracy and injection molding defects. Their sizes may not be processed in place, and there is a probability that some products will fail in anti-torsion.

[0007] 2. If the fixing spikes dig into the cable too much, it is easy to crush the cable and cause the cable sheath protection to fail. If the spikes dig into the cable too shallowly, it is easy to cause poor anti-twist effect of the cable.

[0008] 3. If Figure 6 As shown in the figure, when the cable is bent under stress, the external deformation can easily affect the internal cable, causing the risk of delamination between the cable and the potting compound. At this time, water vapor enters the charged parts inside the junction box along the cable, causing the protection to fail.

[0009] In summary, the research and development of a photovoltaic junction box that improves cable connection reliability and resistance to external bending, reduces the risk of delamination between cables and potting compound, and enhances the protective life and protection capability of the junction box is a technical problem that urgently needs to be solved. Utility Model Content

[0010] In response to the above problems, the utility model provides a photovoltaic junction box that improves cable connection reliability and resistance to external force bending, reduces the risk of delamination between cables and potting glue, and enhances the protective life and protection capability of the junction box.

[0011] The technical solution of the utility model is:

[0012] Photovoltaic junction box that prevents delamination of potting glue and cables, including:

[0013] The box body has an open semicircular groove-shaped cable connection port at the end; a fixed lower semicircular pressure ring is provided in the cable connection port; a pair of first lower pressure ribs are provided at fixed intervals on the side of the lower semicircular pressure ring;

[0014] A pair of second pressing ribs are fixedly arranged on the inner side of the first pressing ribs and adapted to the cable; the distance between the inner side of the second pressing ribs and the outer side of the box body is greater than the diameter of the cable;

[0015] The pressure cover is detachably fixedly connected to the cable wiring port and forms an adaptive cable entry hole therewith; the pressure cover is respectively provided with an upper semicircular pressure ring adapted to the lower semicircular pressure ring, a first upper pressure rib adapted to the first lower pressure rib and a second upper pressure rib adapted to the second lower pressure rib.

[0016] Specifically, a pair of lower semicircular pressure rings are provided and spaced apart from each other.

[0017] Specifically, the first lower pressing rib is fixedly arranged between a pair of lower semicircular pressing rings.

[0018] Specifically, the first lower pressing rib is symmetrically arranged between a pair of lower semicircular pressing rings.

[0019] Specifically, the shoulder of the first downward pressing rib protrudes from the surface of the lower semicircular pressing ring and is adapted to the cable.

[0020] Specifically, the shoulder of the first pressing rib is an arc-shaped structure.

[0021] Specifically, a pair of upper semicircular pressure rings are provided.

[0022] Specifically, a pair of the first upper pressure ribs are provided, and are symmetrically arranged between a pair of the upper semicircular pressure rings (111).

[0023] Specifically, the shoulder of the first upper pressure rib protrudes from the surface of the upper semicircular pressure ring (111) and is adapted to the cable.

[0024] Specifically, the shoulder of the first upper pressing rib is an arc-shaped structure.

[0025] In the present invention, the first lower pressing rib and the first upper pressing rib have the same structure and are also evenly fixed in the cable insertion hole, completely fixing the cable from four directions, locking the cable and increasing the torsional force of the cable. The first lower pressing rib and the first upper pressing rib are respectively block-shaped structures, which prevents the cable from losing its anti-twisting effect due to deviations in raw materials, injection molding, production and other processes, and greatly improves the reliability of cable fixation. The second lower pressing rib and the second upper pressing rib have the same structure and are evenly fixed in the cable insertion hole. A pair of second lower pressing ribs and a pair of second upper pressing ribs are used to lock the displacement of the cable when it is bent and deformed from the inside, and the depth distance design is used to further improve the stability of the cable pressing, avoiding the risk of significant deformation of the cable inside the box when the cable is bent, which creates the risk of delamination between the potting compound and the cable sheath. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the three-dimensional structure of the box body of the utility model;

[0027] Figure 2 This is a three-dimensional structural diagram of the box body and the cable connection state;

[0028] Figure 3 1. It is a schematic diagram of the three-dimensional structure of the gland;

[0029] Figure 4 1. It is a schematic diagram of the top view of the gland;

[0030] Figure 5 This is a schematic diagram of the three-dimensional structure of the box body and the pressure cover in combination;

[0031] Figure 6 It is a schematic diagram of the structure of the cable when it is bent under stress;

[0032] In the figure, 100 is the box body, 110 is the cable connection port, 111 is the lower semicircular pressure ring, and 112 is the first lower pressure rib.

[0033] 210 is the second downward pressing rib.

[0034] 300 is a pressure cover, 311 is an upper semicircular pressure ring, 312 is a first upper pressure rib, and 313 is a second upper pressure rib. DETAILED DESCRIPTION

[0035] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0036] In the description of this utility model, it should be understood that the terms "upper," "lower," "left," "right," "vertical," "horizontal," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of this utility model. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation and are therefore not to be construed as limitations on this utility model. In the description of this utility model, unless otherwise specified, "plurality" means two or more.

[0037] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0038] Reference below Figure 1-5 Description According to the utility model;

[0039] Photovoltaic junction box that prevents delamination of potting glue and cables, including:

[0040] The box body 100 is provided with an open semicircular groove-shaped cable connection port 110 at the end; a fixed lower semicircular pressure ring 111 is provided in the cable connection port 110; a pair of first lower pressure ribs 112 are provided on the side of the lower semicircular pressure ring 111;

[0041] A pair of second pressing ribs 210 are fixedly arranged on the inner side of the first pressing rib 112 and adapted to the cable; the distance between the inner side of the second pressing rib 210 and the outer side of the box body 100 is greater than the diameter of the cable;

[0042] For example, the diameter of a conventional cable is 5.7 mm. In this case, the distance between the inner side wall of the second lower pressing rib 210 and the outer side surface of the box body 100 is 9.5 mm. Figure 4 The middle L distance is 9.5mm.

[0043] The pressure cover 300 is detachably fixedly connected to the cable wiring port 110 and forms an adaptive cable entry hole therewith; the pressure cover 300 is respectively provided with an upper semicircular pressure ring 311 adapted to the lower semicircular pressure ring 111, a first upper pressure rib 312 adapted to the first lower pressure rib 112 and a second upper pressure rib 313 adapted to the second lower pressure rib 210.

[0044] In this case, the first lower and upper ribs 112 and 312 are identical in structure and are equally distributed and fixed within the cable entry hole, completely securing the cable from four directions, locking it in place and increasing its torsional resistance. In actual use, the first lower and upper ribs 112 and 312 press into the cable approximately 0.25mm. These block-shaped ribs prevent loss of anti-twist properties due to variations in raw materials, injection molding, and production, significantly improving cable retention reliability.

[0045] In this case, the second lower pressure ribs 210 and the second upper pressure ribs 313 have the same structure and are evenly distributed and fixed in the cable insertion hole. Through a pair of second lower pressure ribs 210 and a pair of second upper pressure ribs 313, the displacement of the cable during bending and deformation is locked from the inside, and the depth distance design is used to further improve the stability of cable pressing, thereby avoiding the risk of significant deformation of the cable inside the junction box when the cable is bent, and generating delamination of the potting glue and the cable sheath.

[0046] In this embodiment, a pair of lower semicircular pressure rings 111 are preferably provided and spaced apart from each other.

[0047] The first downward pressing rib 112 is symmetrically fixed between a pair of lower semicircular pressing rings 111 . The shoulder of the first downward pressing rib 112 is in an arc-shaped structure and protrudes from the surface of the lower semicircular pressing ring 111 to fit the cable.

[0048] In this embodiment, a pair of upper semicircular pressure rings 311 are preferably provided.

[0049] A pair of first upper pressing ribs 312 are symmetrically arranged between a pair of upper semicircular pressing rings 311 , and the structure is the same as that of the first lower pressing ribs 112 .

[0050] The shoulder of the first upper pressing rib 312 is in an arc-shaped structure and protrudes from the surface of the upper semicircular pressing ring 311 to fit the cable.

[0051] Regarding the content disclosed in this case, the following points need to be explained:

[0052] (1) The drawings of the embodiments disclosed in this case only involve the structures involved in the embodiments disclosed in this case. Other structures can refer to the general design;

[0053] (2) In the absence of conflict, the embodiments and features of the embodiments disclosed in this case may be combined with each other to form new embodiments;

[0054] The above are only specific implementation methods disclosed in this case, but the protection scope of this disclosure is not limited thereto. The protection scope disclosed in this case should be based on the protection scope of the claims.

Claims

1. Photovoltaic junction box that prevents delamination of potting glue and cables, characterized by: include: The box body (100) is provided with an open semicircular groove-shaped cable connection port (110) at its end; a fixedly connected lower semicircular pressure ring (111) is provided in the cable connection port (110); and a pair of first lower pressure ribs (112) are provided at fixed intervals on the side of the lower semicircular pressure ring (111); A pair of second downward pressing ribs (210) are fixedly arranged on the inner side of the first downward pressing rib (112) and adapted to the cable; the distance between the inner side surface of the second downward pressing rib (210) and the outer side surface of the box body (100) is greater than the diameter of the cable; The gland (300) is detachably fixedly connected to the cable connection port (110) and forms a matching cable entry hole therewith; the gland (300) is respectively provided with an upper semicircular pressure ring (311) matching the lower semicircular pressure ring (111), a first upper pressure rib (312) matching the first lower pressure rib (112), and a second upper pressure rib (313) matching the second lower pressure rib (210).

2. The photovoltaic junction box for preventing delamination of potting glue and cables according to claim 1, characterized in that: A pair of lower semicircular pressure rings (111) are provided and spaced apart from each other.

3. The photovoltaic junction box for preventing delamination of potting glue and cables according to claim 2, characterized in that: The first lower pressing rib (112) is fixedly arranged between a pair of lower semicircular pressing rings (111).

4. The photovoltaic junction box for preventing delamination of potting glue and cables according to claim 3, characterized in that: The first lower pressing rib (112) is symmetrically arranged between a pair of lower semicircular pressing rings (111).

5. The photovoltaic junction box for preventing delamination of potting glue and cables according to claim 1, characterized in that: The shoulder of the first lower pressing rib (112) protrudes from the surface of the lower semicircular pressing ring (111) and is adapted to fit the cable.

6. The photovoltaic junction box for preventing delamination of potting glue and cables according to claim 5, characterized in that: The shoulder of the first downward pressing rib (112) is in an arc-shaped structure.

7. The photovoltaic junction box for preventing delamination of potting glue and cables according to claim 1, characterized in that: A pair of upper semicircular pressure rings (311) are provided.

8. The photovoltaic junction box for preventing delamination of potting glue and cables according to claim 7, characterized in that: A pair of the first upper pressing ribs (312) are provided, and are symmetrically arranged between a pair of the upper semicircular pressing rings (311).

9. The photovoltaic junction box for preventing delamination of potting glue and cables according to claim 8, characterized in that: The shoulder of the first upper pressure rib (312) protrudes from the surface of the upper semicircular pressure ring (311) and is adapted to fit the cable.

10. The photovoltaic junction box for preventing delamination of potting glue and cables according to claim 9, characterized in that: The shoulder of the first upper pressing rib (312) is an arc-shaped structure.

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