Junction box for photovoltaic module preventing loss of box cover

Abstract

The utility model discloses a kind of junction box for preventing box cover loss photovoltaic module, including box body, the upper end of box body is provided with upper cover, the rear end upper side of box body is connected with connecting sleeve, the inside of connecting sleeve is clamped with connecting shaft, and connecting shaft is rotatably connected in the inside of connecting sleeve, and is connected in the rear end lower side of upper cover, the left and right sides of the front end of box body are all communicated with threading pipe, the outside of the front end of two threading pipes is all threadedly connected with limit tube, the front end between box body and upper cover is provided with locking assembly, limit groove is opened on the inner wall of the front end opening of limit tube, rubber sealing ring is arranged in the inside of limit groove, the utility model is provided with anti-lost chain in the rear end left side between box body and upper cover, anti-lost chain is connected on box body and upper cover by screw, both ensure that upper cover can be taken out from connecting sleeve by connecting shaft when being maintained or replaced, and upper cover can also prevent from completely separating from box body, avoid loss, simultaneously without affecting the disassembly and maintenance of upper cover.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic module junction boxes, and in particular to a junction box for photovoltaic modules that prevents the box cover from being lost. Background Technology

[0002] During the use of photovoltaic modules, junction boxes, as important devices for connecting and protecting solar photovoltaic modules, play a crucial role in connecting the electricity generated by the solar cells to external lines and conducting the current generated by the photovoltaic modules.

[0003] However, existing photovoltaic module junction boxes have some problems in practical applications, the most prominent of which is that the cover is easily lost. During routine maintenance, repair, or replacement of internal components, if the cover is accidentally lost, it may not only damage the cover and affect its subsequent normal use, but also expose the electronic components inside the junction box, increasing the risk of component damage, reducing the junction box's protective performance and lifespan, and ultimately affecting the performance and stability of the entire photovoltaic module.

[0004] To address the aforementioned issues, this patent proposes a junction box design for photovoltaic modules that features anti-loss functionality, an optimized sealing structure, and ease of maintenance, thereby improving the operational stability and maintenance convenience of photovoltaic systems. Utility Model Content

[0005] The main purpose of this utility model is to propose a junction box for photovoltaic modules that prevents the cover from being lost, aiming to solve the problem that the cover of existing junction boxes for photovoltaic modules is easily lost.

[0006] To address the aforementioned issues, this utility model proposes a junction box for photovoltaic modules to prevent cover loss. The box includes a body with a top cover at its upper end. A connecting sleeve is connected to the upper rear end of the box body. A connecting shaft is engaged inside the connecting sleeve and rotatably connected to the connecting sleeve, and is also connected to the lower rear end of the top cover. Two conduits are connected to the left and right front ends of the box body, and both conduits have threaded limit tubes connected to their outer ends. A locking assembly is provided between the box body and the top cover at the front end.

[0007] Preferably, a limiting groove is formed on the inner wall of the opening at the front end of the limiting tube, and a rubber sealing ring is provided inside the limiting groove. An anti-loss chain is connected to the left rear end of the box body and the top cover, and the upper and lower ends of the anti-loss chain are respectively connected to the left rear end of the box body and the top cover by screws.

[0008] Preferably, the locking assembly includes a compression sleeve, a sealing block, an upper locking clip, and a locking bolt. The outer sides of the box body and the upper cover are each provided with a sealing groove, and a hydraulic sealing ring is provided inside the upper sealing groove.

[0009] Preferably, the hydraulic sealing ring is filled with hydraulic oil, the lower side of the front end of the upper cover is connected to an extrusion sleeve, and the lower side of the inner wall of the rear end of the extrusion sleeve is provided with a connecting groove, which is connected to the sealing groove on the upper side through the connecting groove.

[0010] Preferably, the compression sleeve and the connecting groove are provided with an elastic liquid reservoir, and the elastic liquid reservoir is provided with hydraulic oil and connected to the hydraulic sealing ring. A sealing pressure block is provided at the upper end of the elastic liquid reservoir.

[0011] Preferably, the sealing block is snapped into the inside of the extrusion sleeve and slidably connected to the extrusion sleeve. The front end of the sealing block is provided with an upper locking head, and the upper end of the sealing block and the upper locking head are provided with locking bolts, which are connected to each other.

[0012] Preferably, the locking bolt is threaded inside the sealing block, a lower locking head is provided on the lower side of the upper locking head, and the lower locking head is connected to the upper front end of the box body. A locking hole is opened on the upper front end of the upper cover, and the locking hole is located at the rear end of the sealing block.

[0013] Beneficial effects:

[0014] 1. This utility model provides an anti-loss chain on the left rear end between the box body and the top cover. The anti-loss chain is connected to the box body and the top cover by screws. This ensures that the top cover can be removed from the connecting sleeve through the connecting clip during maintenance or replacement, and also prevents the top cover from completely detaching from the box body to avoid loss. At the same time, it does not affect the disassembly and maintenance of the top cover.

[0015] 2. The junction box of this utility model has a threaded limiting tube at the front end of the conduit. The limiting tube has a limiting groove on its inner wall and a rubber sealing ring is installed so that the wire harness can fit tightly when it is inserted. The threaded limiting and rubber sealing achieve the fixation of the wire harness and the dustproof and waterproof sealing, thereby improving the protective performance of the junction box.

[0016] 3. The mating surface between the box body and the top cover of this utility model is provided with a sealing groove. A hydraulic sealing ring is installed in the sealing groove of the top cover. When closed, the hydraulic sealing ring is compressed and expands to enhance the sealing performance. The locking assembly is linked by the compression sleeve, the elastic liquid reservoir and the locking bolt. When the sealing block is pressed down, the hydraulic oil pushes the hydraulic sealing ring to expand. At the same time, the upper locking head and the lower locking head engage. Finally, it is fixed by the locking bolt to achieve double sealing and prevent accidental opening.

[0017] 4. The front upper side of the connecting sleeve of this utility model is provided with an opening, so that the connecting shaft can be easily inserted or removed, which facilitates the maintenance or replacement of the top cover. At the same time, combined with the anti-loss chain design, it ensures the convenience of disassembly while preventing the loss of parts. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the photovoltaic module junction box in the closed state of this utility model;

[0020] Figure 2 This is a schematic diagram of the photovoltaic module junction box in the open state of this utility model;

[0021] Figure 3 This is a schematic diagram of the left cross-sectional structure of the locking component of this utility model;

[0022] Figure 4 For the present utility model Figure 3 Enlarged view of point A in the middle;

[0023] Figure 5 This is an exploded schematic diagram of the locking component of this utility model.

[0024] The annotations in the attached figures are explained as follows:

[0025] 1. Box body; 2. Top cover; 3. Connecting sleeve; 4. Connecting shaft; 5. Cable guide tube; 6. Limiting tube; 7. Limiting groove; 8. Rubber sealing ring; 9. Anti-loss chain; 10. Sealing groove; 11. Hydraulic sealing ring; 12. Extrusion sleeve; 13. Connecting groove; 14. Elastic liquid reservoir; 15. Sealing block; 16. Upper locking head; 17. Locking bolt; 18. Lower locking head; 19. Locking hole. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] To achieve the above-mentioned utility model objectives, such as Figures 1-5As shown, this utility model provides a junction box for photovoltaic modules to prevent cover loss. It includes a box body 1, with a top cover 2 at the upper end of the box body 1. A connecting sleeve 3 is connected to the upper rear end of the box body 1, and a connecting shaft 4 is engaged inside the connecting sleeve 3. The connecting shaft 4 is rotatably connected inside the connecting sleeve 3 and connected to the lower rear end of the top cover 2. Both the left and right sides of the front end of the box body 1 are connected to wiring conduits 5, and the front ends of the two wiring conduits 5 are threadedly connected to limiting tubes 6. A locking component is provided at the front end between the box body 1 and the top cover 2. A limiting groove 7 is formed on the inner wall of the opening at the front end of the limiting tube 6, and a rubber sealing ring 8 is provided inside the limiting groove 7. The junction box is used for wiring between the solar panel and the charge / discharge control device in a photovoltaic module. The connection hub is used to realize the transmission of electricity, so that the power generated by the photovoltaic module can be smoothly delivered to the downstream equipment or the power grid. During the wiring process, the top cover 2 is lifted back by the rotation of the connecting clip 4 inside the connecting sleeve 3. The wire harness is inserted into the limiting tube 6 and the rubber sealing ring 8, so that the rubber sealing ring 8 fits tightly against the outside of the wire harness. Then, it is inserted into the two wire tubes 5 respectively to connect with the internal circuit. The wire harness is limited and sealed by the threaded connection between the limiting tube 6 and the wire tube 5, and the rubber sealing ring 8 fits tightly against the wire harness. After the wiring is completed, the top cover 2 is rotated and fitted onto the upper end of the box 1 to close the junction box and protect the electrical components inside the junction box.

[0028] The box body 1 and the top cover 2 are connected by an anti-loss chain 9 on the left rear end. The upper and lower ends of the anti-loss chain 9 are connected to the left rear end of the box body 1 and the top cover 2 by screws. Since the upper front end of the connecting sleeve 3 has an opening, the connecting sleeve 4 can be pulled out from the inside of the connecting sleeve 3, which makes it easier to repair and replace the top cover 2. At the same time, the top cover 2 can be connected to the box body 1 through the anti-loss chain 9 to prevent the top cover 2 from being completely separated from the box body 1 and to avoid the top cover 2 from being lost. The anti-loss chain 9 can be connected to and removed from the box body 1 and the top cover 2 by screws, which can not only prevent the top cover 2 from being lost, but also ensure that the top cover 2 can be repaired and replaced.

[0029] Preferably, the locking assembly includes a compression sleeve 12, a sealing block 15, an upper locking clip 16, and a locking bolt 17. Both the outer sides of the box body 1 and the upper cover 2 are provided with sealing grooves 10. A hydraulic sealing ring 11 is provided inside the upper sealing groove 10. During the closing process of the junction box, the upper cover 2 drives the hydraulic sealing ring 11 to engage with the sealing groove 10 at the upper end of the box body 1, so that the box body 1 and the upper cover 2 can be sealed through the sealing groove 10 and the hydraulic sealing ring 11, preventing dust and rainwater from entering the junction box and improving the safety performance of the junction box.

[0030] Preferably, the hydraulic sealing ring 11 is filled with hydraulic oil. A compression sleeve 12 is connected to the lower front end of the upper cover 2. A connecting groove 13 is formed on the lower inner wall of the rear end of the compression sleeve 12, and it communicates with the upper sealing groove 10 through the connecting groove 13. An elastic fluid reservoir 14 is provided inside the compression sleeve 12 and the connecting groove 13, and the elastic fluid reservoir 14 is filled with hydraulic oil and communicates with the hydraulic sealing ring 11. A sealing block 15 is provided at the upper end of the elastic fluid reservoir 14. The sealing block 15 is snapped into the inside of the compression sleeve 12 and slidably connected to the compression sleeve 12. An upper locking head 16 is provided at the front end of the sealing block 15. A locking bolt 17 is provided inside the upper end of the sealing block 15 and the upper locking head 16, and they are connected through the locking bolt 17. The locking bolt 17 is threadedly connected to the sealing ring 11. Inside block 15, a lower locking head 18 is provided on the lower side of the upper locking head 16, and the lower locking head 18 is connected to the upper front side of the box body 1. A locking hole 19 is opened on the upper front side of the upper cover 2, and the locking hole 19 is located at the rear end of the sealing block 15. After the hydraulic sealing ring 11 is inserted into the lower sealing groove 10, the rear end of the locking bolt 17 is fully screwed into the sealing block 15. At this time, when the sealing block 15 is pressed down, since the upper locking head 16 is connected to the sealing block 15 through the locking bolt 17 and is not completely disengaged, when the sealing block 15 is pressed down, the sealing block 15 drives the upper locking head 16 to move downward through the locking bolt 17 and inserts it into the lower locking head 18, so that the upper locking head 16 and the lower locking head 18 are locked.

[0031] Simultaneously, the sealing block 15 slides downward inside the compression sleeve 12 and compresses the elastic liquid reservoir 14, forcing the hydraulic oil inside the elastic liquid reservoir 14 into the hydraulic sealing ring 11. This causes the hydraulic sealing ring 11 to expand inside the two sealing grooves 10, allowing it to tightly adhere to the inner walls of the two sealing grooves 10, improving the sealing performance between the sealing grooves 10 and the hydraulic sealing ring 11. This, in turn, improves the sealing performance between the box body 1 and the upper cover 2. When the upper locking clip 16 is in contact with the upper end of the compression sleeve 12, the sealing block... The upper end of 15 is flush with the upper end of the upper cover 2. The upper locking head 16 is just inserted into the lower locking head 18, and the locking hole 19 is just behind the locking bolt 17. At this time, tighten the locking bolt 17 backward to completely fix the sealing block 15 and the upper locking head 16, and insert it into the locking hole 19 to fix the upper cover 2 and the sealing block 15. This allows the junction box to improve the sealing performance by pressing down the sealing block 15 after it is closed, and to be completely locked by the locking bolt 17 to prevent the junction box from being opened accidentally.

[0032] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A junction box for photovoltaic modules to prevent cover loss, characterized in that, The box includes a box body (1), a top cover (2) is provided on the upper end of the box body (1), a connecting sleeve (3) is connected to the upper rear end of the box body (1), a connecting shaft (4) is snapped into the connecting sleeve (3), and the connecting shaft (4) is rotatably connected inside the connecting sleeve (3) and connected to the lower rear end of the top cover (2). The left and right sides of the front end of the box body (1) are connected to wire tubes (5), and the front ends of the two wire tubes (5) are threaded to limit tubes (6). A locking component is provided between the front end of the box body (1) and the top cover (2). A limiting groove (7) is provided on the inner wall of the opening at the front end of the limiting tube (6). A rubber sealing ring (8) is provided inside the limiting groove (7). An anti-loss chain (9) is connected to the left rear end of the box body (1) and the top cover (2). The upper and lower ends of the anti-loss chain (9) are respectively connected to the left rear end of the box body (1) and the top cover (2) by screws. The locking assembly includes a compression sleeve (12), a sealing block (15), an upper locking clip (16), and a locking bolt (17). The outer sides of the box body (1) and the upper cover (2) are provided with sealing grooves (10), and a hydraulic sealing ring (11) is provided inside the upper sealing groove (10).

2. The junction box for photovoltaic modules to prevent cover loss as described in claim 1, characterized in that, The hydraulic sealing ring (11) is filled with hydraulic oil. The lower front end of the upper cover (2) is connected to the extrusion sleeve (12). The lower rear inner wall of the extrusion sleeve (12) is provided with a connecting groove (13), which is connected to the upper sealing groove (10) through the connecting groove (13).

3. A junction box for photovoltaic modules to prevent cover loss as described in claim 2, characterized in that, The compression sleeve (12) and the connecting groove (13) are provided with an elastic liquid reservoir (14), and the elastic liquid reservoir (14) is provided with hydraulic oil and is connected to the hydraulic sealing ring (11). A sealing pressure block (15) is provided at the upper end of the elastic liquid reservoir (14).

4. A junction box for photovoltaic modules to prevent cover loss as described in claim 3, characterized in that, The sealing block (15) is snapped into the inside of the extrusion sleeve (12) and slidably connected with the extrusion sleeve (12). The front end of the sealing block (15) is provided with an upper locking head (16). The upper end of the sealing block (15) and the upper locking head (16) are provided with locking bolts (17) and are connected by locking bolts (17).

5. A junction box for photovoltaic modules to prevent cover loss as described in claim 4, characterized in that, The locking bolt (17) is threaded inside the sealing block (15). The lower locking head (18) is provided on the lower side of the upper locking head (16), and the lower locking head (18) is connected to the upper front end of the box body (1). The upper front end of the upper cover (2) is provided with a locking hole (19), and the locking hole (19) is located at the rear end of the sealing block (15).

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