Photovoltaic junction box

Abstract

The utility model relates to the junction box field, and discloses a photovoltaic junction box comprising a box body used for providing a sealed wiring environment; the wiring end plate is arranged in the box body and is used for connecting an external cable to an internal circuit; and the connecting mechanism is arranged in the box body and is used for connecting and fixing the wire harness. According to the utility model, through the adoption of the self-adaptive connecting mechanism and the action of the inclined surfaces of the movable seat and the limiting seat, the wiring harnesses with different diameters can be accurately clamped and fixed, so that the wiring harnesses can still be kept in a good clamping state when being subjected to external force, and the risk that the wiring harnesses are loosened or fall off is prevented; the installation process is simplified in a mechanical adjusting mode, professional assembling tools are not needed, the requirement for skills of operators is lowered, the installation process is rapid and convenient, and the installation time cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of junction boxes, in particular to a photovoltaic junction box. Background Art

[0002] The connection between the photovoltaic junction box and the photovoltaic panel is an important link in the photovoltaic power generation system, which ensures the smooth transmission of electricity from the photovoltaic panel to the subsequent power processing equipment.

[0003] After searching, the publication number is: CN115913097A, which discloses a junction box for photovoltaic components, including a box body, a plurality of connecting core plates are fixedly connected to the rear side of the inner wall of the box body, two corresponding connecting core plates are commonly fixedly connected to the opposite side surfaces of the core plates, a supporting plate is fixedly connected to the lower side of the surfaces of the core plates, and connecting wires are fixedly connected to the lower surfaces of the core plates, and the surfaces of the connecting wires are wound around and connected to a longitudinal retracting rod.

[0004] Existing photovoltaic junction boxes usually use screw fastening, crimping terminals or welding to connect power lines. These methods not only require professional tools and operating skills, but also increase the complexity and time cost of the installation process. Not only are they inefficient, but they are also prone to uneven fastening force due to human factors, affecting the reliability of the connection. Junction boxes often lack an effective fixing mechanism, or the fixing method is not stable enough, which causes the power line to loosen or even fall off under environmental factors such as wind and temperature changes. Summary of the invention

[0005] In order to solve the above problems, the utility model is implemented through the following technical solutions:

[0006] A photovoltaic junction box, comprising:

[0007] The box body is used to provide a sealed wiring environment;

[0008] A terminal board, installed in the box body, used to connect external cables to internal circuits;

[0009] A connecting mechanism, installed in the box body, for connecting and fixing the wiring harness;

[0010] The connecting mechanism comprises:

[0011] A connecting seat connected to the box body;

[0012] A limiting groove is provided on one side of the connecting seat and is used for placing the wiring harness;

[0013] A plurality of limit seats are arranged on the connecting seat, and the terminal plate is connected to the plurality of limit seats at the same time. The plurality of limit seats are arranged to approach or move away from the axial direction of the connecting seat at the same time, so as to clamp and fix wire harnesses of different diameters.

[0014] The connecting mechanism also includes:

[0015] A plurality of through holes are formed on the inner wall of the limiting groove, the limiting seat is connected in the through holes, and a slope is formed on one side of the limiting seat;

[0016] Multiple movable seats are respectively connected in multiple through holes, and the movable seats are fitted with the inclined surfaces of the limiting seats. The movable seats are configured to push the limiting seats to move synchronously toward the axis of the connecting seat through the inclined surface when moving upward in the through holes, so as to clamp and fix the wiring harness.

[0017] The connecting mechanism also includes:

[0018] A thread groove is formed on the surface of the connecting seat;

[0019] The control sleeve is arranged on the outer ring of the connecting seat and cooperates with the threaded groove. The movable seat is connected to the inner ring of the control sleeve. The control sleeve is arranged on the connecting seat. When the control sleeve rotates on the connecting seat, it drives the movable seat to move in the through hole.

[0020] The control sleeve comprises:

[0021] An annular groove is provided on the inner ring of the control sleeve;

[0022] The fixed block is installed on the movable seat, and the fixed block is connected in the annular groove.

[0023] The connecting mechanism also includes:

[0024] A movable groove is provided on the top wall of the through hole;

[0025] A moving block is connected to the top of the limiting seat, the moving block is connected in the moving groove, and the moving block is configured to move in the moving groove when the limiting seat moves;

[0026] An elastic member, one end of which is connected to the side wall of the moving groove and the other end of which is connected to the moving block, is used to provide a restoring force for the moving block to its initial position.

[0027] Also includes:

[0028] The sealing mechanism is connected to the box body and is used for sealing the connecting wire harness.

[0029] The sealing mechanism comprises:

[0030] A sealing sleeve, mounted on one side of the box body;

[0031] The sealing member is connected in the sealing sleeve and is used for providing a sealed connection between the wiring harness and the box body.

[0032] Also includes:

[0033] Multiple connecting wires, one end of which is connected to the terminal board, and the other end of which is respectively connected to multiple limit seats. The utility model provides a photovoltaic junction box. Compared with the prior art, it has the following beneficial effects:

[0034] 1. The connection mechanism adopts adaptive design. Through the inclined surface of the moving seat and the limit seat, it can achieve accurate clamping and fixation of wire harnesses of different diameters, effectively avoiding the connection problems caused by uneven fastening force. The stable cooperation between the limit seat and the moving seat, as well as the restoring force provided by the elastic part, ensure that the wire harness can still maintain a good clamping state when subjected to external force, prevent the risk of loosening or falling off of the wire harness, and improve the reliability of electrical connection.

[0035] 2. The mechanical adjustment method simplifies the installation process. There is no need to use professional assembly tools, which reduces the requirements for operator skills. The installation process is fast and convenient, reducing the installation time cost and improving the overall work efficiency. The junction box can still maintain the stability of the power cord connection under the influence of environmental factors such as wind and temperature changes, reducing the problem of loosening or falling off caused by environmental factors.

[0036] 3. The design of the sealing mechanism effectively prevents the intrusion of external factors such as moisture and dust, protects the safety and stable operation of the internal circuit, and reduces the risk of circuit failure caused by environmental factors. The overall structure of the junction box is compact and stable, and the connection between the components is reliable, which improves the durability and service life of the junction box. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a schematic diagram of the three-dimensional structure proposed by the utility model.

[0038] Figure 2 The utility model is a schematic structural diagram of the terminal plate, connecting mechanism and connecting wires proposed in the present invention.

[0039] Figure 3 This is a schematic diagram of the cross-sectional structure of the connecting mechanism proposed by the utility model.

[0040] Figure 4 This is a schematic diagram of the cross-sectional structure of the sealing mechanism proposed by the utility model.

[0041] The reference numerals in the figure are:

[0042] 1. Box body;

[0043] 2. Terminal board;

[0044] 3. Connecting mechanism; 301. Connecting seat; 302. Limiting groove; 303. Through hole; 304. Limiting seat; 305. Moving seat; 306. Control sleeve; 307. Fixed block; 308. Threaded groove; 309. Moving block; 310. Moving groove; 311. Elastic member;

[0045] 4. Sealing mechanism; 401. Sealing sleeve; 402. Sealing element;

[0046] 5. Connecting wire. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model is described clearly and completely. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0048] Reference Figure 1-Figure 4A photovoltaic junction box comprises: a box body 1 for providing a sealed wiring environment; a terminal plate 2 installed in the box body 1 for connecting external cables to internal circuits; a connecting mechanism 3 installed in the box body 1 for connecting and fixing a wiring harness; the connecting mechanism 3 comprises: a connecting seat 301 connected in the box body 1; a limiting groove 302 provided on one side of the connecting seat 301 for placing a wiring harness; a plurality of limiting seats 304 arranged on the connecting seat 301, the terminal plate 2 is connected to the plurality of limiting seats 304 at the same time, and the plurality of limiting seats 304 are arranged to simultaneously approach or move away from the axial direction of the connecting seat 301 for adjusting different straight The plurality of through holes 303 are provided on the inner wall of the limiting groove 302, the limiting seat 304 is connected to the through hole 303, and a slope is formed on one side of the limiting seat 304; the plurality of movable seats 305 are respectively connected to the plurality of through holes 303, the movable seats 305 are fitted with the slope of the limiting seat 304, and the movable seats 305 are arranged to push the limiting seat 304 synchronously to the axis of the connecting seat 301 through the action of the slope when moving upward in the through hole 303, so as to clamp and fix the wiring harness; the threaded groove 308 is provided on the surface of the connecting seat 301; the control sleeve 306 is arranged on the outer ring of the connecting seat 301 and In cooperation with the thread groove 308, the movable seat 305 is connected to the inner ring of the control sleeve 306. The control sleeve 306 is arranged on the connecting seat 301. The control sleeve 306 is arranged to drive the movable seat 305 to move in the through hole 303 when rotating on the connecting seat 301. The multiple limit seats 304 in the connecting mechanism 3 can synchronously move closer to or away from the axis of the connecting seat 301 through the up and down movement and the action of the inclined surface of the movable seat 305, so as to achieve accurate clamping and fixation of wire harnesses of different diameters. This adaptive design enhances the versatility and flexibility of the junction box, reduces the installation difficulties caused by the mismatch of the wire harness size, and can be easily installed by rotating the control sleeve 305. 06, the movable seat 305 can be easily driven to move in the through hole 303, and the position of the limit seat 304 can be adjusted to achieve the clamping and release of the wire harness. This mechanical adjustment method is not only simple and quick to operate, but also improves the efficiency of installation and maintenance. No professional assembly tools are required. Insert the wire harness into the box body 1 and rotate the control sleeve 306 to complete the assembly. The inclined design between the limit seat 304 and the movable seat 305, and the stable movement of the movable seat 305 in the through hole 303 ensure that the wire harness can still maintain a good clamping state when subjected to external force, prevent the risk of the wire harness loosening or falling off, and ensure the reliability of the electrical connection.

[0049] Reference Figure 3 The control sleeve 306 includes: an annular groove, which is opened on the inner circle of the control sleeve 306; a fixed block 307, which is installed on the moving seat 305, and the fixed block 307 is connected in the annular groove.

[0050] Reference Figure 3The connecting mechanism 3 also includes: a moving groove 310, which is opened on the top wall of the through hole 303; a moving block 309, which is connected to the top of the limiting seat 304, and the moving block 309 is connected in the moving groove 310. The moving block 309 is configured to move in the moving groove 310 when the limiting seat 304 moves; an elastic member 311, one end of which is connected to the side wall of the moving groove 310 and the other end is connected to the moving block 309, which is used to provide a restoring force for the initial position of the moving block 309. The elastic member 311 provides a restoring force for the initial position of the moving block 309 and the limiting seat 304. When the control sleeve 306 rotates to the release position, the limiting seat 304 can automatically reset to the initial state, which is convenient for the next installation or adjustment of the wiring harness. The elastic member 311 adopts a stainless steel spring and can also adopt elastic rubber.

[0051] Reference Figure 1 and Figure 4 , a sealing mechanism 4 is connected to the box body 1 and is used to seal the connecting wire 5; the sealing mechanism 4 includes: a sealing sleeve 401, installed on one side of the box body 1; a sealing member 402, connected in the sealing sleeve 401, and is used to provide a sealed connection between the wire harness and the box body 1. The combined use of the sealing sleeve 401 and the sealing member 402 provides a reliable sealed connection between the wire harness and the box body 1, effectively preventing the intrusion of external factors such as moisture and dust, and protecting the safety and stable operation of the internal circuit.

[0052] Reference Figure 1 and Figure 2 , multiple connecting wires 5, one end of which is connected to the terminal plate 2, and the other end is respectively connected to multiple limit seats 304, the limit seats 304 are made of conductive material, the limit seats 304 not only clamp and fix the wiring harness, but also provide conductivity for the wiring harness, and the wiring harness and the terminal plate 2 are energized through the connecting wires 5.

[0053] During use, one end of the photovoltaic wiring harness is passed through the sealing sleeve 401, and the wiring harness enters the box body 1 through the sealing member 402, and the wiring harness is placed in the limiting groove 302 of the connecting seat 301, ready for clamping and fixing, and the control sleeve 306 is rotated. Since the control sleeve 306 cooperates with the threaded groove 308 on the connecting seat 301, the rotation action will drive the control sleeve 306 to move on the connecting seat 301, and the fixed block 307 moves in the annular groove. Therefore, the movable seat 305 will move upward in the through hole 303 as the control sleeve 306 rotates, and the movable seat 305 fits with the inclined surface of the limiting seat 304. As the movable seat 305 rises, the inclined surface pushes the limiting seat 304 to synchronously move closer to the axial direction of the connecting seat 301, thereby achieving alignment. To clamp the wire harness, continue to rotate the control sleeve 306 according to the actual diameter of the wire harness until the limit seat 304 reaches the appropriate clamping force to ensure that the wire harness is stable and not loose. Check whether the wire harness is firmly clamped by the limit seat 304 to ensure that there is no risk of loosening or falling off. If necessary, you can make fine adjustments by slightly rotating the control sleeve 306 to achieve the best clamping effect. Since the limit seats 304 are made of conductive materials, they not only clamp and fix the wire harness, but also realize electrical connection at the same time, ensuring that all electrical connections are firm and reliable without the risk of short circuit or open circuit. Confirm that all components have been correctly installed and fixed, and the wire harness and electrical connections are in good condition. Close the box body 1 to ensure that the internal environment of the junction box is sealed to prevent external factors from intruding.

[0054] In summary, compared with the prior art, the present invention has the following beneficial effects:

[0055] The connection mechanism 3 with an adaptive design can achieve precise clamping and fixation of wire harnesses of different diameters through the inclined surface action of the movable seat 305 and the limiting seat 304, effectively avoiding connection problems caused by uneven tightening force. The stable fit between the limiting seat 304 and the movable seat 305 and the restoring force provided by the elastic member 311 ensure that the wire harness can still maintain a good clamping state when subjected to external force, preventing the risk of the wire harness loosening or falling off, and improving the reliability of the electrical connection.

[0056] The mechanical adjustment method simplifies the installation process, eliminates the need for professional assembly tools, reduces the skill requirements for operators, and makes the installation process quick and convenient, reducing installation time costs and improving overall work efficiency. The junction box can still maintain the stability of the power cord connection under the influence of environmental factors such as wind and temperature changes, reducing the problem of loosening or falling off caused by environmental factors.

[0057] The design of the sealing mechanism 4 effectively prevents the intrusion of external factors such as moisture and dust, protects the safety and stable operation of the internal circuit, and reduces the risk of circuit failure due to environmental factors. The overall structure of the junction box is compact and stable, and the connection between the components is reliable, which improves the durability and service life of the junction box.

[0058] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A photovoltaic junction box, characterized in that: include: The box body (1) is used to provide a sealed wiring environment; A terminal board (2), installed in the box body (1), used for connecting external cables to internal circuits; A connecting mechanism (3), installed in the box body (1), and used for connecting and fixing the wiring harness; The connecting mechanism (3) comprises: A connecting seat (301), connected inside the box body (1); A limiting groove (302) is provided on one side of the connecting seat (301) and is used for placing a wiring harness; A plurality of limit seats (304) are arranged on the connecting seat (301); the terminal plate (2) is simultaneously connected to the plurality of limit seats (304); the plurality of limit seats (304) are arranged to simultaneously approach or move away from the axial direction of the connecting seat (301) for clamping and fixing wire harnesses of different diameters.

2. A photovoltaic junction box according to claim 1, characterized in that: The connecting mechanism (3) further comprises: A plurality of through holes (303) are formed on the inner wall of the limiting groove (302); the limiting seat (304) is connected to the through hole (303); and a slope is formed on one side of the limiting seat (304); A plurality of movable seats (305) are respectively connected in a plurality of through holes (303); the movable seats (305) are fitted with the inclined surfaces of the limiting seats (304); and the movable seats (305) are configured to push the limiting seats (304) synchronously toward the axis of the connecting seat (301) through the action of the inclined surfaces when moving upward in the through holes (303), so as to clamp and fix the wiring harness.

3. A photovoltaic junction box according to claim 2, characterized in that: The connecting mechanism (3) further comprises: A thread groove (308) is formed on the surface of the connecting seat (301); The control sleeve (306) is arranged on the outer ring of the connecting seat (301) and cooperates with the thread groove (308). The movable seat (305) is connected to the inner ring of the control sleeve (306). The control sleeve (306) is arranged on the connecting seat (301). The control sleeve (306) is arranged to drive the movable seat (305) to move in the through hole (303) when rotating on the connecting seat (301).

4. A photovoltaic junction box according to claim 3, characterized in that: The control sleeve (306) comprises: An annular groove is provided on the inner ring of the control sleeve (306); The fixed block (307) is installed on the movable seat (305), and the fixed block (307) is connected in the annular groove.

5. A photovoltaic junction box according to claim 2, characterized in that: The connecting mechanism (3) further comprises: A movable groove (310) is formed on the top wall of the through hole (303); A moving block (309) is connected to the top of the limiting seat (304), the moving block (309) is connected in the moving groove (310), and the moving block (309) is configured to move in the moving groove (310) when the limiting seat (304) moves; An elastic member (311) has one end connected to the side wall of the moving groove (310) and the other end connected to the moving block (309), and is used to provide a restoring force for the moving block (309) to return to its initial position.

6. A photovoltaic junction box according to claim 1, characterized in that: Also includes: The sealing mechanism (4) is connected to the box body (1) and is used for sealing the connecting wire (5) bundle.

7. A photovoltaic junction box according to claim 6, characterized in that: The sealing mechanism (4) comprises: A sealing sleeve (401) is installed on one side of the box body (1); The sealing member (402) is connected inside the sealing sleeve (401) and is used to provide a sealed connection between the wiring harness and the box body (1).

8. The photovoltaic junction box according to claim 1, characterized in that: Also includes: A plurality of connecting wires (5) have one end connected to the terminal plate (2) and the other end connected to a plurality of limit seats (304).

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