Photovoltaic junction box for offshore photovoltaic modules

Abstract

The utility model discloses a kind of photovoltaic junction boxes for offshore photovoltaic module, including junction box shell and the sealing cover of cooperation installation, junction box shell and sealing cover are set to the high-performance engineering plastics of polyphenyl ether material, for preventing offshore high salt high humidity corrosion, junction box shell lower surface is fixedly arranged fixed plate, connecting wire harness is passed into the inside of junction box shell and is accessed junction block using bolt, junction block is fixedly installed on the upper surface of the junction board in the inside of junction box shell, connecting wire harness top end is set with the connecting buckle connected with photovoltaic panel.The photovoltaic junction box for offshore photovoltaic module, junction box shell and sealing cover are set to the high-performance engineering plastics of polyphenyl oxide material, for preventing offshore high salt high humidity environment corrosion, and after wiring, by adjusting knob rotating threaded rod, using threaded rod to drive extruding block to move, so that extruding block extrudes fixed connecting wire harness, reach the purpose of secondary fixation, to improve the stability of wiring.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic junction box technology, specifically a photovoltaic junction box for marine photovoltaic modules. Background Technology

[0002] Photovoltaic junction boxes are important components of solar photovoltaic modules. They are mainly used to connect photovoltaic cell strings, transmit electrical energy, and provide circuit protection and environmental protection functions. They are the key interface between photovoltaic modules and external circuits, and directly affect the safety and stability of the system.

[0003] In the prior art, Chinese patent application number CN201810931379.6 discloses a photovoltaic junction box, including a box body, a power management module, a positive cable and a negative cable. The box body includes an upper cover and a bottom shell. The positive cable and the negative cable pass through the box body and connect to the power management module. Limiting blocks are installed on the positive cable and / or the negative cable. The bottom shell has a first groove and a second groove corresponding to the first groove. The first groove and the second groove form a slot. The limiting blocks are inserted into the slot and fixed to the positive cable and the negative cable by the upper cover and the bottom shell.

[0004] The above-mentioned material is a common type of photovoltaic junction box in the prior art. It achieves the purpose of wiring by fixing the cable through the cooperation between the limiting block and the slot. However, in actual use, the cooperation between the limiting block and the slot is a fixed connection, which gives the cable some room for movement. When connecting the photovoltaic panel, the cable may be pulled. Since there is no room for movement, the cable may fall off or be damaged when pulled. Utility Model Content

[0005] The purpose of this utility model is to provide a photovoltaic junction box for marine photovoltaic modules, so as to solve the problem of cable damage caused by pulling mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a photovoltaic junction box for marine photovoltaic modules, comprising a junction box shell and a sealing cover that is installed therewith. Both the junction box shell and the sealing cover are made of high-performance engineering plastic made of polyphenylene ether to prevent corrosion from high salt and humidity at sea. A fixing plate is fixedly installed on the lower surface of the junction box shell. The connecting wire harness passes through the junction box shell and is connected to the connecting block by bolts. The connecting block is fixedly installed on the upper surface of the connecting plate inside the junction box shell. A connecting buckle for connecting to the photovoltaic panel is provided at the top of the connecting wire harness. A mounting plate is fixedly installed on the upper surface of the front end of the connecting plate. A fixing clip for secondary fixing of the connecting wire harness is fixedly installed on the upper surface of the mounting plate. Two guide wheels corresponding to the connecting wire harness are provided on the upper surface of the mounting plate. A buffer mechanism for buffering the guide wheels is provided inside the mounting plate.

[0007] Preferably, a pressing plate corresponding to the connecting wire harness is provided on the inner side of the fixing clamp, wherein the bottom of the pressing plate slides in contact with the fixing clamp to prevent the pressing plate from rotating when subjected to rotational force, so that the pressing plate only has linear motion on the fixing clamp. A threaded rod is rotatably installed on the side of the pressing plate, wherein the threaded rod passes through the fixing clamp and forms a threaded engagement with it, and an adjustment knob is coaxially fixedly installed at the rear end of the threaded rod.

[0008] Preferably, an elastic insulating rubber extrusion pad is fixedly installed on the inner side of the fixing clamp.

[0009] Preferably, the buffer mechanism includes a guide slide rod fixedly installed inside the mounting plate, and a buffer spring is provided on the outside of the guide slide rod. The buffer spring provides a margin of movement and buffers the connection harness when it is pulled, thus avoiding damage to the harness.

[0010] Preferably, a connecting slider is rotatably mounted on the lower end of the guide wheel, and the connecting slider and the guide slide rod form a through sliding structure.

[0011] Preferably, the connecting slider and the buffer spring are pressed against each other, and the guide wheel bends the connecting wire harness between it and the fixing clamp.

[0012] Compared with the prior art, the beneficial effects of this utility model are: the photovoltaic junction box for the offshore photovoltaic module adopts a novel structural design, the specific details of which are as follows: 1. Both the junction box housing and the sealing cover are made of high-performance engineering plastic polyphenylene oxide to prevent corrosion in the high-salt and high-humidity marine environment. After wiring, the threaded rod is rotated by adjusting the knob, and the threaded rod drives the extrusion block to move, so that the extrusion block extrudes and fixes the connection harness, achieving the purpose of secondary fixation, thereby improving the wiring stability. Furthermore, when connecting the wiring harness to the photovoltaic panel module, if the wiring harness is pulled, it will squeeze the guide wheel. At this time, the guide wheel moves by the cooperation between the connecting slider and the guide rod below it. The connecting slider squeezes the buffer spring, and the elasticity of the buffer spring is used to achieve the purpose of buffering, so as to prevent the wiring harness from being pulled off or damaged.

[0013] 2. An elastic rubber compression pad is provided on the inner surface of the fixing clip. During secondary fixing, the compression pad protects the connecting wire harness and reduces wear on the connecting wire harness. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of the junction box of this utility model; Figure 3 This is a schematic diagram of the upper surface structure of the connector board of this utility model; Figure 4 This utility model Figure 3 Enlarged structural diagram at point A in the middle; Figure 5 This is a schematic diagram of the upper surface structure of the mounting plate of this utility model; Figure 6 This is a schematic diagram showing the connection relationship between the connecting slider and the guide rod of this utility model; Figure 7 This is a schematic diagram of the fixing clip structure of this utility model.

[0015] In the diagram: 1. Junction box housing; 2. Sealing cover; 3. Fixing plate; 4. Connecting wire harness; 5. Connecting buckle; 6. Terminal block; 7. Terminal block; 8. Mounting plate; 9. Fixing clamp; 10. Pressing plate; 11. Threaded rod; 12. Adjusting knob; 13. Pressing pad; 14. Guide wheel; 15. Connecting slider; 16. Guide slide rod; 17. Buffer spring. Detailed Implementation

[0016] 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.

[0017] Example 1: Please refer to Figures 1-4 and Figure 7 This embodiment provides the following technical solution, specifically disclosing: a junction box housing 1 and a sealing cover 2 that is installed therewith; a fixing plate 3 is fixedly installed on the lower surface of the junction box housing 1; a connecting wire harness 4 passes through the junction box housing 1 and is connected to a wiring block 7 by bolts; the wiring block 7 is fixedly installed on the upper surface of the wiring plate 6 inside the junction box housing 1; a connecting buckle 5 for connecting to a photovoltaic panel is provided at the top of the connecting wire harness 4; an mounting plate 8 is fixedly installed on the upper surface of the front end of the wiring plate 6; a fixing clamp 9 for secondary fixing of the connecting wire harness 4 is fixedly installed on the upper surface of the mounting plate 8; a pressing plate 10 corresponding to the connecting wire harness 4 is provided inside the fixing clamp 9; the bottom of the pressing plate 10 slides in contact with the fixing clamp 9 to prevent the pressing plate 10 from rotating when subjected to rotational force, so that the pressing plate 10 only has linear motion on the fixing clamp 9; a threaded rod 11 is rotatably installed on the side of the pressing plate 10; the threaded rod 11 passes through the fixing clamp 9 and forms a threaded engagement with it; an adjusting knob 12 is coaxially fixedly installed at the rear end of the threaded rod 11; and an elastic insulating rubber pressing pad 13 is fixedly installed inside the fixing clamp 9.

[0018] In this embodiment, when wiring the photovoltaic panel module, firstly, the two connecting wires 4 are passed through the junction box housing 1 and extended into its interior. Then, the connecting wires 4 inside the junction box housing 1 are connected to the wiring block 7 using bolts. Subsequently, the adjusting knob 12 is rotated, which drives the threaded rod 11 to rotate. At this time, the threaded rod 11 drives the extrusion plate 10 to move. Finally, the extrusion plate 10 and the extrusion pad 13 are used to fix the connecting wires 4 for the second time, improving the stability of the connection of the connecting wires 4. Then, the sealing cover 2 is fixed on the top of the junction box housing 1 using bolts (both the junction box housing 1 and the sealing cover 2 are made of high-performance engineering plastic made of polyphenylene ether to prevent corrosion in the high-salt and high-humidity marine environment).

[0019] Example 2: Please refer to Figures 5-6 This embodiment provides the following technical solution, specifically disclosing that: two guide wheels 14 corresponding to the connecting wire harness 4 are provided on the upper surface of the mounting plate 8, and a buffer mechanism for buffering the guide wheels 14 is provided inside the mounting plate 8. The buffer mechanism includes a guide slide rod 16 fixedly installed inside the mounting plate 8, and a buffer spring 17 is provided outside the guide slide rod 16. A connecting slider 15 is rotatably installed at the lower end of the guide wheel 14. The connecting slider 15 and the guide slide rod 16 form a through sliding structure. The connecting slider 15 and the buffer spring 17 are pressed against each other, and the guide wheel 14 bends the connecting wire harness 4 between it and the fixing clamp 9.

[0020] In this embodiment, after the junction box is assembled, the connecting buckles 5 at the top of the two connecting wire harnesses 4 are connected to the terminal of the photovoltaic panel module. During this process, if the operator pulls the connecting wire harnesses 4, the bends of the connecting wire harnesses 4 will squeeze the guide wheel 14. At this time, the connecting slider 15 below the guide wheel 14 slides outside the guide slide rod 16, and the connecting slider 15 squeezes the buffer spring 17. The elasticity of the buffer spring 17 is used to achieve the purpose of buffering. Finally, the connection wire harnesses 4 are prevented from falling off and being damaged due to the movement margin and buffering effect.

[0021] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] 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 photovoltaic junction box for offshore photovoltaic modules, comprising a junction box housing (1) and a sealing cover (2) fitted therewith, wherein a fixing plate (3) is fixedly disposed on the lower surface of the junction box housing (1), characterized in that, Also includes: The connecting wire harness (4) passes through the junction box housing (1) and is connected to the wiring block (7) by bolts. The wiring block (7) is fixedly installed on the upper surface of the wiring plate (6) inside the junction box housing (1). The top of the connecting wire harness (4) is provided with a connecting buckle (5) for connecting to the photovoltaic panel. A mounting plate (8) is fixedly installed on the upper surface of the front end of the junction box (6), and a fixing clip (9) for secondary fixing of the connecting wire harness (4) is fixedly installed on the upper surface of the mounting plate (8). The upper surface of the mounting plate (8) is provided with two guide wheels (14) corresponding to the connecting wire harness (4), and the inside of the mounting plate (8) is provided with a buffer mechanism for buffering the guide wheels (14).

2. The photovoltaic junction box for offshore photovoltaic modules according to claim 1, characterized in that: The inner side of the fixing clamp (9) is provided with a pressing plate (10) corresponding to the connecting wire harness (4). The bottom of the pressing plate (10) slides in contact with the fixing clamp (9). A threaded rod (11) is rotatably installed on the side of the pressing plate (10). The threaded rod (11) passes through the fixing clamp (9) and forms a threaded engagement with it.

3. A photovoltaic junction box for offshore photovoltaic modules according to claim 2, characterized in that: The adjusting knob (12) is coaxially fixed at the rear end of the threaded rod (11).

4. A photovoltaic junction box for offshore photovoltaic modules according to claim 2, characterized in that: An elastic insulating rubber extrusion pad (13) is fixedly installed on the inside of the fixing clip (9).

5. A photovoltaic junction box for offshore photovoltaic modules according to claim 1, characterized in that: The buffer mechanism includes a guide slide rod (16) fixedly installed inside the mounting plate (8), and a buffer spring (17) is provided on the outside of the guide slide rod (16).

6. A photovoltaic junction box for offshore photovoltaic modules according to claim 5, characterized in that: The lower end of the guide wheel (14) is rotatably mounted with the connecting slider (15), and the connecting slider (15) and the guide slide rod (16) form a through sliding structure.

7. A photovoltaic junction box for offshore photovoltaic modules according to claim 6, characterized in that: The connecting slider (15) and the buffer spring (17) are pressed against each other, and the guide wheel (14) bends the connecting wire harness (4) between it and the fixing clamp (9).

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