Outdoor direct-current power connection box

Abstract

An outdoor DC power connection box provided by the present invention comprises a box body, the interior of the box body is fixedly connected with a partition plate, the box body is divided into a detection chamber and a wiring chamber from front to back, the interior of the wiring chamber is fixedly connected with two copper bars, the copper bars are bent and extend to the detection chamber, and a wire arrangement frame is arranged below the copper bars. A wire inlet hole is formed in the bottom of the box body and communicated with the wiring chamber, the edge of the wire inlet hole is bent downwards to form an arc-shaped folded edge, and rubber blocks are arranged at the two ends of the wire inlet hole in a buckled mode. According to the invention, the box body is divided into the two chambers, the use requirement is met, and meanwhile, the arrangement of the pre-embedded bracket ensures the stability of supporting and fixing of the box body.

Description

Technical Field

[0001] This invention relates to the field of distribution box technology, and more particularly to an outdoor DC connection box. Background Technology

[0002] A photovoltaic (PV) panel is a device that converts solar energy into electrical energy, primarily composed of photovoltaic cells (also known as solar cells). PV panels convert solar radiation into direct current (DC) through the photoelectric effect and are widely used in various fields, such as residential, commercial, and industrial power supply.

[0003] In large-scale photovoltaic (PV) power generation systems, a large number of PV panels are arranged in both horizontal and vertical directions. Multiple PV panels are pre-connected in series and then connected in parallel. When connected in series, adjacent PV panels can be directly connected together. However, when connected in parallel, a distribution box is required to provide space for the parallel connections. Furthermore, large-scale PV power generation systems also need to be equipped with a monitoring system to ensure that each PV panel / group is operating normally. If damage occurs, it facilitates information gathering for maintenance and repair. Therefore, a distribution box is needed in a PV power generation system to meet both of these requirements. Summary of the Invention

[0004] To address the aforementioned problems, this invention discloses an outdoor DC power supply box, comprising a box body. A partition is fixedly connected inside the box body, dividing it into a testing chamber and a wiring chamber. Two copper busbars are fixedly connected inside the wiring chamber, and these busbars are bent and extend into the testing chamber. By setting the partition, the box body is divided into a testing chamber and a wiring chamber, achieving two different functions.

[0005] A cable management rack is installed below the copper busbar, and a cable inlet is provided at the bottom of the enclosure, which is connected to the wiring chamber. The edge of the cable inlet is bent downward to form an arc-shaped fold, and rubber blocks are fastened at both ends of the cable inlet. The cable entering through the cable inlet is electrically connected to the copper busbar, and the arc-shaped fold and rubber blocks prevent the cable from being severely damaged by scratches from long-term vibration and other factors.

[0006] Preferably, a pre-embedded bracket is provided at the bottom of the enclosure, and the pre-embedded bracket is a cuboid frame composed of several rods. Connecting lugs are fixedly connected to the four corners of the lower end of the enclosure, and the upper part of the pre-embedded bracket passes through the connecting lugs. Nuts are provided on the pre-embedded bracket to clamp the connecting lugs. The pre-embedded bracket is part of the foundation formed by casting, ensuring the stability of the enclosure support. At the same time, the setting of the pre-embedded bracket also facilitates the connection of the enclosure grounding wire.

[0007] Preferably, the bottom of the enclosure has several pre-set holes that connect to the testing chamber. When needed, the plate in the middle of the pre-set holes can be removed to fully expose the holes, facilitating cable routing.

[0008] Preferably, a mounting plate is fixedly connected inside the testing chamber, and the upper part of the partition plate is provided with a through hole, which connects the testing chamber and the wiring chamber. The mounting plate is made of wood, which facilitates the fixed connection of the testing devices, and the through hole facilitates the connection of the testing cables to the copper busbar.

[0009] Preferably, the cable management rack includes a U-shaped frame, the front of which has a groove with a rubber pad fixedly connected therein, and a fixing rod is fitted on the front of the U-shaped frame. The fixing rod and the U-shaped component clamp and secure the cable, preventing it from being pulled and falling off the copper busbar.

[0010] Preferably, the front and back of the enclosure are rotatably connected to doors. These doors are opened to allow for the configuration and wiring of the electrical box.

[0011] The beneficial effects of this invention are as follows:

[0012] 1. The enclosure is designed to divide its internal space into a testing chamber and a wiring chamber by a partition to meet usage requirements. At the same time, an arc-shaped fold is provided at the edge of the cable inlet to protect the cable that is inserted.

[0013] 2. An embedded bracket is provided. The embedded bracket is pre-cast in the foundation to provide stable support and fixation for the tank outdoors. In addition, the embedded bracket provides grounding for the liquid level tank. Attached Figure Description

[0014] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0015] Figure 2 This is a front view of the housing of the present invention;

[0016] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0017] Figure 4 This is a schematic diagram of the back of the housing of the present invention;

[0018] Figure 5 for Figure 4 Enlarged view of point B in the middle.

[0019] List of reference numerals in the attached diagram:

[0020] 1. Embedded bracket; 2. Enclosure; 3. Enclosure door; 4. Cable inlet; 5. Pre-set hole; 6. Connecting lug; 7. Testing chamber; 8. Mounting plate; 9. Copper busbar; 10. Through hole; 11. Rubber block; 12. Curved edge; 13. Wiring chamber; 14. Cable management rack;

[0021] 141. U-shaped frame; 142. Rubber pad; 143. Fixing rod. Detailed Implementation

[0022] The present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, and the terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0023] like Figures 1 to 5 As shown, an outdoor DC junction box includes a box body 2, which is a rectangular thin-shell component. The box body 2 has a partition fixedly connected inside, dividing it into a detection chamber 7 and a wiring chamber 13. Specifically, this junction box is used in a photovoltaic power generation system. The electrical energy output from the photovoltaic panel is collected in the junction box and then sent to the inverter for processing. Two copper busbars 9 are fixedly connected inside the wiring chamber 13. The copper busbars 9 are provided with several threaded holes to facilitate the connection of cables. The copper busbars 9 are bent and extended to the detection chamber 7, that is, the copper busbars 9 play a parallel role. Then, the main cable is connected in the detection chamber 7.

[0024] Furthermore, a support base is provided on the partition, and the copper busbar 9 is fixedly connected to the support base by bolts. The support bases used for the two copper busbars 9 are at different heights to facilitate the connection of positive and negative cables. After the cable connecting the photovoltaic panel enters the wiring chamber 7, it is fixedly connected to the copper busbar 9. That is, the end of the cable is provided with a terminal block, and then the terminal block is pressed and fixed by bolts mating with the threaded holes on the copper busbar 9.

[0025] A cable management rack 14 is installed below the copper busbar 9. The cable management rack 14 ensures that the cables entering the wiring chamber 13 are neat and fixed. The bottom of the box 2 is provided with a cable inlet hole 4. The cable inlet hole 4 is a long square hole and is connected to the wiring chamber 13. The cable enters the wiring chamber 13 through the cable inlet hole 4. The edge of the cable inlet hole 4 is bent downward to form an arc-shaped folded edge 12. That is, the cable inlet hole 4 is obtained by stamping and bending to form an arc-shaped folded edge 12. The cable passing through the cable inlet hole 4 and the arc-shaped folded edge 12 are in arc-shaped contact, avoiding the cable from contacting the right-angle edge on the box 2, which would cause wear on the cable over a long period of time. In addition, rubber blocks 11 are fastened at both ends of the cable inlet hole 4. The rubber blocks 11 also serve to protect the cable.

[0026] A pre-embedded bracket 1 is installed at the bottom of the box body 2. The pre-embedded bracket 1 is a rectangular frame composed of several rods. Specifically, the rods are welded from several steel bars. The upper part of the steel bars of the vertical device is threaded. During construction, the pre-embedded bracket 1 is pre-cast to form a foundation, and the upper part must be reserved. During the installation of the box body 2, the ground clearance between the box body 2 and the foundation must be ensured. The four corners of the lower end of the box body 2 are fixedly connected with connecting ears 6. The upper part of the pre-embedded bracket 1 passes through the connecting ears 6, that is, the connecting ears 6 are sleeved on the pre-embedded bracket 1. The pre-embedded bracket 1 is provided with nuts to hold the connecting ears 6. That is, at least two nuts are provided. The setting of two nuts not only fixes the box body 2, but also facilitates changing the fixed height of the box body 2.

[0027] The bottom of the housing 2 is provided with several preset holes 5, which are connected to the test chamber 7. The plate in the preset hole 5 is removed to expose the hole, and the cable can be passed through the hole into the test chamber 7. For example, the main cable passes through the hole and is fixedly connected to the copper busbar 9.

[0028] The testing chamber 7 is fixedly connected to a mounting plate 8, which is made of wood and allows for easy fixing of electronic components to the mounting plate 8 with screws. The upper part of the partition is provided with a through hole 10, which connects the testing chamber 7 and the wiring chamber 13.

[0029] Furthermore, a testing device is fixedly connected to the mounting plate 8, and the testing cable of the testing device enters the wiring chamber 13 through the through hole 10. Then, the testing cable and the cable connected to the photovoltaic panel are connected in parallel or in series to detect the real-time status of photovoltaic power generation.

[0030] The cable management rack 14 includes a U-shaped frame 141, with both ends of the U-shaped frame 141 fixedly connected to the partition. The front of the U-shaped frame 141 is provided with a groove, and a rubber pad 142 is fixedly connected in the groove. A fixing rod 143 is provided on the front of the U-shaped frame 141. The cable passes through the U-shaped frame 141 and the fixing rod 143, and the fixing rod 143 clamps and fixes the cable to achieve cable fixation. In addition, the rubber pad 142 is provided to protect the cable and prevent it from being squeezed and damaged.

[0031] Both the front and back of the enclosure 2 are rotatably connected to the enclosure door 3. Rotating to open the enclosure door 3 allows for cable connection and equipment configuration.

[0032] The technical means disclosed in this invention are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features.

Claims

1. An outdoor DC junction box, characterized in that, Includes a housing (2), the interior of which is fixedly connected to a partition and divided into a detection chamber (7) and a wiring chamber (13). The wiring chamber (13) is fixedly connected to two copper busbars (9), and the copper busbars (9) are bent and extended to the detection chamber (7). A cable management rack (14) is provided below the copper busbar (9). A cable inlet hole (4) is provided at the bottom of the box (2). The cable inlet hole (4) is connected to the wiring chamber (13). The edge of the cable inlet hole (4) is bent downward to form an arc-shaped fold (12). Rubber blocks (11) are fastened to both ends of the cable inlet hole (4).

2. The outdoor DC junction box according to claim 1, characterized in that: The box (2) is provided with a pre-embedded bracket (1) at the bottom, and the pre-embedded bracket (1) is a rectangular frame composed of several rods. The four corners of the lower end of the box (2) are fixedly connected with connecting ears (6). The upper part of the pre-embedded bracket (1) passes through the connecting ears (6), and the pre-embedded bracket (1) is provided with nuts to hold the connecting ears (6).

3. An outdoor DC junction box according to claim 1, characterized in that: The bottom of the box (2) is provided with several preset holes (5), which are connected to the detection chamber (7).

4. An outdoor DC junction box according to claim 1, characterized in that: The testing chamber (7) is fixedly connected to an installation plate (8). The upper part of the partition is provided with a through hole (10), and the through hole (10) connects the testing chamber (7) and the wiring chamber (13).

5. An outdoor DC junction box according to claim 1, characterized in that: The cable management rack (14) includes a U-shaped frame (141), the front of the U-shaped frame (141) is provided with a groove, and a rubber pad (142) is fixedly connected in the groove. A fixing rod (143) is provided on the front of the U-shaped frame (141).

6. An outdoor DC junction box according to claim 1, characterized in that: The front and back of the box (2) are rotatably connected with boxes (3).

Images