Anti-burnout junction box in photovoltaic power generation system

Abstract

The utility model discloses an anti-burnout junction box in a photovoltaic power generation system, which comprises a box body, the box body is made of flame-retardant materials, two wiring terminals are arranged in the box body, a diode is fixedly connected between the two wiring terminals, one end of each wiring terminal is fixedly connected with a cable, the side surface of the box body is provided with a raised box, and the raised box is fixedly connected with the two wiring terminals. A pulling sound device is arranged in the protruding box, and the cable is clamped in the pulling sound device. When the cable is excessively dragged, the dragging sound device generates vibration sound to remind installation personnel to pay attention to not causing connection loosening of the cable, so that the installation quality is ensured, and the burning risk increase caused by human factors is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to photovoltaic junction box technical field especially relates to a kind of photovoltaic power generation system in prevent burning junction box. BACKGROUND

[0002] Photovoltaic junction box is the connecting device between solar cell array and solar charging control device, and its main function is to connect and protect solar photovoltaic module, connect the power generated by solar cell with external circuit, and conduct the current generated by photovoltaic module.

[0003] The existing photovoltaic junction box cable is directly led out by the terminal, and the limit pulling of the module junction box cable by the installation worker can cause the internal contact metal of the connector to move, resulting in the burning of the later grid-connected connector. UTILITY MODEL CONTENT

[0004] The utility model aims at solving the shortcomings in the prior art, and provides a kind of photovoltaic power generation system in prevent burning junction box, to solve the problems in the above background art.

[0005] In order to achieve the above object, the utility model adopts the following technical scheme:

[0006] A kind of photovoltaic power generation system in prevent burning junction box, including box body, the box body is made of flame-retardant material, two terminal blocks are provided in the box body, two terminal blocks are fixedly connected diode between each other, one cable is fixedly connected to each terminal block, a protruding box is arranged on the side of the box body, a pulling sounder is arranged in the protruding box, and the cable is clamped in the pulling sounder.

[0007] Preferably, the pulling sounder includes a limiting block and a moving block, the limiting block and the moving block are respectively provided with a clamping groove, the cable is arranged in the clamping groove, a plurality of elastic sheets are fixedly connected to the inner wall of the protruding box, and the moving block is fixedly connected to a push piece on the side opposite to the elastic sheet.

[0008] The inner wall of the protruding box is fixedly connected with a guide column, the moving block is provided with a guide hole, and the guide column is fixedly connected with the support spring between the guide hole and the inner wall of the protruding box.

[0009] Preferably, the limiting block is in arc structure and the inner arc surface is away from the moving block, the moving block is provided with a slope, and the clamping grooves of the limiting block and the moving block are in overall curved shape.

[0010] Preferably, the clamping groove is fixedly connected with a rubber pad, and the upper opening width of the rubber pad is less than the diameter of the cable, the inner hole diameter of the rubber pad is less than the diameter of the cable and greater than the upper opening width of the rubber pad.

[0011] Preferably, the push piece is provided with a round corner.

[0012] Preferably, the protruding box has a through hole, and the cable is covered with a rubber sleeve.

[0013] Preferably, the rubber sleeve is provided with bosses at both ends, and the distance between the two bosses is greater than the wall thickness of the raised box.

[0014] Preferably, a circular frame is fixedly connected inside the boss.

[0015] The advantages of this utility model are as follows: The anti-burnout junction box in the photovoltaic power generation system provided by this utility model has a buffer margin formed when the cable is pulled, with the cable bending between the moving block and the limiting block. That is, the moving block moves but the limiting block does not move, so that the cable and the terminal block will not become loose or have a poor connection. The actuating piece moves with the moving block, causing the spring to actuate, vibrate and make a sound, which promptly reminds the installer to pay attention to avoid causing the cable connection to become loose, thereby ensuring the installation quality and avoiding the increased risk of burnout due to human error. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the basic structure of this utility model;

[0017] Figure 2 yes Figure 1 Enlarged view of section F in the image;

[0018] Figure 3 This is a schematic diagram of the cross-sectional structure of the cable and slot of this utility model. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0020] like Figures 1 to 3 As shown, the present invention provides a burn-out prevention junction box for a photovoltaic power generation system, comprising a box body 1. The box body 1 is composed of two half-box structures joined together by screws to form a whole. The box body 1 is made of conventional flame-retardant material. Two wiring terminals 11 are provided inside the box body 1, and a diode 12 is fixedly connected between the two wiring terminals 11. A cable 13 is fixedly connected to one end of each wiring terminal 11. A protruding box 14 is provided on the side of the box body 1, and a pull-to-sound device 2 is provided inside the protruding box 14. The cable 13 is snapped into the pull-to-sound device 2.

[0021] To mitigate the risk of pulling on the junction box during construction, after cable 13 is connected to terminal 11, it needs to pass through pull sounder 2. When cable 13 is pulled excessively, pull sounder 2 will produce a vibration sound to remind installers to be careful not to cause the connection of cable 13 to become loose, thereby ensuring installation quality and avoiding an increase in the risk of burnout due to human error. Example 2

[0022] like Figures 1 to 3 As shown, the pull-to-sound device 2 includes a limiting block 21 and a moving block 22. The limiting block 21 and the moving block 22 are each provided with a slot 23. The cable 13 is placed in the slot 23, which is fixedly connected to a rubber pad 231. The width of the upper opening of the rubber pad 231 is smaller than the diameter of the cable 13, and the inner diameter of the rubber pad 231 is smaller than the diameter of the cable 13 but larger than the width of the upper opening. The cable 13 is squeezed into the rubber pad 231, causing the moving block 22 to move when the cable 13 is pulled. The limiting block 21 forms an arc shape. The inner arc surface is set away from the moving block 22. The moving block 22 is provided with a ramp 221. The groove 23 of the limiting block 21 and the moving block 22 is curved in shape, like an "S" shape. Multiple spring pieces 24 are fixedly connected at intervals on the inner wall of the protruding box 14. A toggle piece 25 is fixedly connected to the side of the moving block 22 opposite to the spring piece 24. The toggle piece 25 is provided with a rounded corner 251. The toggle piece 25 moves with the moving block 22 to aggle and vibrate the spring piece 24 and produce a sound. The vibration of the toggle piece 25 to produce a sound is a common structural principle.

[0023] A guide post 26 is fixedly connected to the inner wall of the protruding box 14, and a guide hole is provided on the movable block 22. A support spring 27 is fixedly connected between the guide post 26 and the guide hole, and between the movable block 22 and the inner wall of the protruding box 14.

[0024] When the cable 13 is pulled, the cable 13 bends between the moving block 22 and the limiting block 21, forming a buffer margin. That is, the moving block 22 moves, but the limiting block 21 does not move, so that the cable 13 and the terminal 11 will not become loose or have a poor connection.

[0025] When the movable block 22 is pulled and moved, the actuating piece 25 moves with the movable block 22, causing the spring piece 24 to be actuated, vibrate and make a sound, which promptly reminds the installer to pay attention to avoid causing the cable 13 to become loose, thereby ensuring the installation quality and avoiding the increased risk of burnout due to human error. Example 3

[0026] like Figures 1 to 3As shown, the raised box 14 has a through hole, and a rubber sleeve 3 is fitted on the outside of the cable 13. A boss 31 is provided at both ends of the rubber sleeve 3, and the distance between the two bosses 31 is greater than the wall thickness of the raised box 14. A circular frame, such as a built-in plastic circular frame, is fixedly connected inside the bosses 31 to provide a limiting function. The rubber sleeve 3 passes through the end of the cable 13. The rubber sleeve 3, combined with the two half-box structures, forms a single box 1, protecting and sealing the cable 13. The rubber sleeve 3 is pressed tightly against the outer wall of the cable 13. When the cable 13 is pulled, it provides both protection and a seal. The sealed box 1 is filled with an inert gas, such as nitrogen, for protection. When the cable 13 is pulled, the rubber sleeve 3 compensates for displacement, and the bosses 31 at both ends provide a limiting function.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A kind of anti-burn junction box in photovoltaic power generation system, including box body (1), the box body (1) is made of flame-retardant material, two terminal blocks (11) are arranged in box body (1), two terminal blocks (11) are fixedly connected between diode (12), one cable (13) is fixedly connected to each terminal block (11) one end, the side of box body (1) is provided with convex box (14), it is characterized by: The pulling sounder (2) is arranged in the convex box (14), and the cable (13) is clamped in the pulling sounder (2).

2. A burn-proof junction box for use in a photovoltaic power generation system according to claim 1, characterized in that: The pulling sounder (2) comprises a limiting block (21) and a moving block (22), the limiting block (21) and the moving block (22) are respectively provided with a clamping groove (23), the cable (13) is arranged in the clamping groove (23), a plurality of elastic sheets (24) are fixedly connected between the inner walls of the convex box (14), and a pressing piece (25) is fixedly connected to one side of the moving block (22) relative to the elastic sheet (24). The convex box (14) is fixedly connected with a guide column (26) on the inner wall, the moving block (22) is provided with a guide hole, and the guide column (26) is fixedly connected with the guide hole and the moving block (22) and the inner wall of the convex box (14).

3. A burnout-proof junction box for use in a photovoltaic power generation system according to claim 2, characterized in that: The limiting block (21) is in an arc structure and is arranged away from the moving block (22) in an inner arc surface, the moving block (22) is provided with a slope (221), and the clamping groove (23) of the limiting block (21) and the moving block (22) is in a curved shape as a whole.

4. A burn-proof junction box for use in a photovoltaic power generation system according to claim 2, characterized in that: The clamping groove (23) is fixedly connected with a rubber pad (231), the upper opening width of the rubber pad (231) is smaller than the diameter of the cable (13), the inner hole diameter of the rubber pad (231) is smaller than the diameter of the cable (13) and greater than the upper opening width of the rubber pad (231).

5. A burn-proof junction box for use in a photovoltaic power generation system according to claim 2, characterized in that: The pressing piece (25) is provided with a round corner (251).

6. A burn-proof junction box for use in a photovoltaic power generation system according to claim 2, characterized in that: The convex box (14) is provided with a through hole, and the outer side of the cable (13) is sleeved with a rubber sleeve (3).

7. A burnout-proof junction box for use in a photovoltaic power generation system according to claim 6, characterized in that: The rubber sleeve (3) is provided with a boss (31) at each end, and the distance between the two bosses (31) is greater than the wall thickness of the convex box (14).

8. A burnout-proof junction box for use in a photovoltaic power generation system according to claim 7, characterized in that: The boss (31) is fixedly connected with a circular ring framework in the inside.

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