A photovoltaic cable pre-branching cable device

Abstract

This invention relates to the field of cable connection technology, and more particularly to a pre-branched photovoltaic cable device. A pre-branched photovoltaic cable device with stable and reliable connection and convenient on-site maintenance includes a lower housing, etc.; the lower housing and upper housing are rotatably connected, and can be fixed when closed. Multiple first top posts are vertically installed inside the lower housing. Bolts penetrating the upper housing are screwed into the first top posts to fix the lower and upper housings. A positioning structure is provided on the left side of the lower housing to position the cable entering the lower housing. This invention positions the cable line through a conductor groove, and the terminal block at the end of the main cable is held in place by a limiting plate. This positioning and limiting plate not only prevents internal wiring clutter but also prevents wiring overlap that could cause road malfunctions. Only one clamping nut is needed to complete the wiring connection, thus improving the stability of the wiring connection.

Description

Technical Field

[0001] This invention relates to the field of cable connection technology, and in particular to a pre-branched cable device for photovoltaic cables. Background Technology

[0002] With the rapid development and widespread application of photovoltaic (PV) power generation technology, PV systems have placed higher demands on the security, reliability, and ease of maintenance of power transmission. In PV power plants, cables, as the key carriers of power transmission, directly affect the overall performance and operational stability of the system due to their connection structure. Among these, pre-branched cables, as a wiring solution integrating the main cable with multiple branch cables, are widely used in PV DC and AC power distribution systems due to their advantages such as saving installation space and reducing on-site wiring workload.

[0003] Currently, photovoltaic (PV) pre-branched cable systems typically consist of a main cable, branch cables, branch connectors, and related accessories. The main cable carries the primary power transmission, while the branch cables extend from the main cable to provide electrical connections for different PV strings or inverters. In existing technologies, the electrical connection between the main cable and branch cables is mostly achieved through crimping or injection molding. While crimping is simple and low-cost, it is prone to loosening due to vibration, thermal expansion and contraction, or mechanical stress during long-term operation, leading to increased contact resistance, localized overheating, or even circuit breaks. Injection molding, while providing good sealing and mechanical strength, makes rapid on-site disassembly and repair difficult in case of failure, often requiring complete replacement, resulting in high maintenance costs and significantly impacting the operational efficiency of the PV system.

[0004] Therefore, there is an urgent need to develop a photovoltaic cable pre-branching cable device that can ensure a stable and reliable electrical connection between the main cable and the branch cables, while also taking into account the structural detachability and the convenience of on-site maintenance. Summary of the Invention

[0005] To overcome the shortcomings of the prior art, the present invention provides a photovoltaic cable pre-branching device that provides stable and reliable connection and facilitates on-site maintenance.

[0006] The technical solution of the present invention is as follows: a photovoltaic cable pre-branching device, comprising a lower housing, an upper housing, a positioning structure, a connector, a connecting wire, and a branching device. The lower housing and the upper housing are rotatably connected and can be fixed after being closed. Multiple first top columns are vertically installed inside the lower housing. The lower housing and the upper housing are fixed by screwing bolts through the upper housing into the first top columns. A positioning structure is provided on the left side of the lower housing to position the cable entering the lower housing. A branching device is provided in the middle of the lower housing. A row of connectors is provided on the right wall of the lower housing. The connectors are connected to the branching device through the connecting wire. The main cable passes through the left wall of the lower housing and connects to the branching device. The main cable and the connecting wire are connected by pressing from above and below.

[0007] In a preferred embodiment of the present invention, a row of wire clamping plates is provided on the inner side of the upper housing. The wire clamping plates are concave. After the lower housing and the upper housing are closed, the wire clamping plates are on the left side of the connector.

[0008] In a preferred embodiment of the present invention, the positioning structure includes a positioning plate and a limiting plate. The positioning plate is provided in the left part of the lower housing. A row of wire grooves is provided on the upper side of the positioning plate. A limiting plate is provided on the positioning plate to the right of the wire grooves.

[0009] In a preferred embodiment of the present invention, the branching device includes a second top post, a fixing plate, a conductive post, a clamping bolt, and a clamping nut. A row of second top posts is arranged in the middle of the lower housing. A fixing plate is connected between the top ends of the second top posts. A row of conductive posts is arranged on the fixing plate. The conductive posts are annular. The clamping bolt passes through the conductive posts from bottom to top. The upper part of the clamping bolt is connected to the clamping nut by a thread. The end of the main cable is connected to the lower part of the clamping bolt, and the end of the connecting wire is connected to the upper part of the clamping bolt.

[0010] In a preferred embodiment of the present invention, the cap of the clamping bolt is diamond-shaped.

[0011] In a preferred embodiment of the present invention, the branching device further includes limiting posts, and the bottom of the fixing plates on both sides of the clamping bolt cap is provided with limiting posts, and the limiting posts are in contact with the rhomboid surface of the clamping bolt cap.

[0012] In a preferred embodiment of the present invention, a protective cover is also included. The protective cover is rotatably mounted on the top right side of the upper housing, and a wire hole is provided on the protective cover on the right side of the connector.

[0013] In a preferred embodiment of the present invention, a pad is also included, and a pad is provided on the lower housing below the protective cover.

[0014] Compared with the prior art, the present invention has the following advantages: The present invention positions the cable line through the wire groove, and the terminal block at the end of the main cable is locked in the limiting plate. In this way, the positioning plate and the limiting plate can not only prevent the internal wiring from becoming messy, but also prevent the wiring from overlapping and causing road conditions. Only one clamping nut needs to be tightened to complete the wiring connection, which not only improves the stability of the wiring connection, but also prevents the bolts from being tightened too much and causing omissions. Furthermore, because the limiting post fits the diamond-shaped surface of the clamping bolt head, the clamping bolt will not rotate when the clamping nut is rotated, thus facilitating the wiring connection work. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0016] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention after it has been opened.

[0017] Figure 3 This is a three-dimensional structural diagram of the lower and upper shells of the present invention.

[0018] Figure 4 This is a three-dimensional structural diagram of the interior of the lower housing of the present invention.

[0019] Figure 5 This is a three-dimensional structural diagram of the positioning structure and the branching device of the present invention.

[0020] Figure 6 This is a three-dimensional structural diagram of the positioning structure of the present invention.

[0021] Figure 7 This is a three-dimensional structural schematic diagram of the wire splitting device of the present invention.

[0022] Figure 8 This is a three-dimensional structural schematic diagram of the wire splitting device of the present invention from another perspective.

[0023] The above-mentioned figures include the following reference numerals: 1. Lower housing, 1a. First top post, 2. Upper housing, 2a. Wire clamping plate, 3. Positioning structure, 31. Positioning plate, 31a. Wire groove, 32. Limiting plate, 4. Connector, 41. Connecting wire, 5. Splitting device, 51. Second top post, 52. Fixing plate, 53. Conductive post, 54. Clamping bolt, 55. Clamping nut, 56. Limiting post, 6. Protective cover, 6a. Wire hole, 61. Pad. Detailed Implementation

[0024] First, it should be noted that in different described embodiments, the same components are given the same reference numerals or the same component names. The disclosure contained throughout this specification can be applied semantically to the same components having the same reference numerals or the same component names. The location descriptions selected in the specification, such as upper, lower, lateral, etc., also refer to the directly described and illustrated figures and are semantically applied to the new location when the location changes.

[0025] Example: A photovoltaic cable pre-branching cable device, such as Figures 1-8 As shown, it includes a lower housing 1, an upper housing 2, a positioning structure 3, a connector 4, a connecting wire 41, and a splitter 5. The left sides of the lower housing 1 and the upper housing 2 are rotatably connected by a hinge. The lower housing 1 and the upper housing 2 can be fixed after being closed. Multiple first top posts 1a are vertically installed inside the lower housing 1. The top center of the first top post 1a has a downwardly recessed threaded hole. The upper housing 2 above the first top posts 1a has through holes. Bolts are screwed into the through holes of the upper housing 2 to connect the lower housing 1 and the upper housing 2. The upper housing 2 is fixed, and a positioning structure 3 is provided in the left side of the lower housing 1, which positions the cable entering the lower housing 1. The positioning structure 3 can position and fix the cable and connector. A branching device 5 is provided in the middle of the lower housing 1, and a row of connectors 4 is provided on the right wall of the lower housing 1. The connectors 4 and the branching device 5 are connected by a connecting line 41. The main cable passes through the left wall of the lower housing 1 and is connected to the branching device 5 through a terminal block. The main cable and the connecting line 41 are connected by pressing from top to bottom.

[0026] A photovoltaic cable pre-branching device: In use, the main cable first passes through the left wall of the lower housing 1 and enters the lower housing 1. The end of the main cable is then pressed with the terminal block. The main cable is then connected to the lower part of the branching device 5 through the terminal block. Next, the main cable is limited by the positioning structure 3. After the main cable is connected, the left end of the connecting wire 41 is connected to the upper part of the branching device 5 through the terminal block. Then, by rotating, the left end of the connecting wire 41 is pressed together with the right end of the main cable. Finally, the upper housing 2 is rotated to close the lower housing 1 and the upper housing 2 and the lower housing 1 are fixed.

[0027] like Figure 2 and Figure 3 As shown, a row of cable clamping plates 2a are provided on the inner side of the upper housing 2, extending forward and backward. The cable clamping plates 2a are concave and have rounded inner edges. After the lower housing 1 and the upper housing 2 are closed, the cable clamping plates 2a are on the left side of the connector 4. After the lower housing 1 and the upper housing 2 are closed, the connecting wires 41 on the left side of the connector 4 are gathered in the corresponding cable clamping plates 2a. This limits the same bundle of branch cables and prevents the cables from becoming messy.

[0028] like Figures 4-6 As shown, the positioning structure 3 includes a positioning plate 31 and a limiting plate 32. The positioning plate 31 extends forward and backward on the left side of the lower housing 1. A row of wire grooves 31a is opened on the upper side of the positioning plate 31. The depth of the wire grooves 31a is greater than the radius of the cable. The top edge of the wire grooves 31a is rounded so that the cable can be locked in the wire grooves 31a. A limiting plate 32 is opened on the positioning plate 31 on the right side of the wire grooves 31a. A groove with the same shape as the terminal block is opened on the limiting plate 32. The terminal block at the end of the main cable is locked in the limiting plate 32. In this way, the positioning plate 31 and the limiting plate 32 can not only prevent the internal wiring from being messy, but also prevent the wiring from overlapping and causing road conditions.

[0029] like Figure 7 and Figure 8 As shown, the branching device 5 includes a second top post 51, a fixing plate 52, conductive posts 53, clamping bolts 54, clamping nuts 55, and limiting posts 56. A row of second top posts 51 extends forward and backward within the middle of the lower housing 1. Each second top post 51 has a threaded hole at its top. The tops of the second top posts 51 are connected to the fixing plate 52 by bolts. A row of conductive posts 53 is arranged on the fixing plate 52. The conductive posts 53 are annular. The clamping bolts 54 pass through the conductive posts 53 from bottom to top. The upper part of the clamping bolts 54 is connected to the clamping nuts 55 by threads. The terminal block at the end of the main cable is sleeved on the lower part of the clamping bolts 54, and the terminal block at the end of the connecting wire 41 is sleeved on the upper part of the clamping bolts 54. The cap of the clamping bolts 54 is diamond-shaped. The bottom of the fixing plate 52 on both sides of the cap of the clamping bolts 54 is provided with... The limiting post 56 is fitted with the diamond-shaped surface of the cap of the clamping bolt 54. After the terminals at the ends of the main cable and the connecting wire 41 are both fitted onto the clamping bolt 54, the clamping nut 55 is tightened, so that the terminals at the ends of the main cable and the connecting wire 41 are in contact with the conductive post 53, thus connecting the circuit. Because the ends of the main cable and the connecting wire 41 coincide in the vertical direction, only one clamping nut 55 needs to be tightened to complete the circuit connection. This not only improves the stability of the circuit connection, but also prevents the bolts from being tightened too much, which could lead to omissions. Furthermore, because the limiting post 56 is fitted with the diamond-shaped surface of the cap of the clamping bolt 54, the clamping bolt 54 will not rotate when the clamping nut 55 is rotated, which facilitates the connection work.

[0030] like Figures 1-3 As shown, it also includes a protective cover 6 and a pad 61. The protective cover 6 is rotatably installed on the top right side of the upper housing 2. A wire hole 6a is opened on the protective cover 6 on the right side of the connector 4. A pad 61 is provided on the lower housing 1 below the protective cover 6. When the equipment is not in use, the protective cover 6 protects the connector 4. When the equipment is in use, the protective cover 6 can also protect the docking position.

[0031] Those skilled in the art should understand that the above embodiments do not limit the present invention in any way, and all technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of the present invention.

Claims

1. A photovoltaic cable pre-branching device, characterized in that: It includes a lower housing (1), an upper housing (2), a positioning structure (3), a connector (4), a connecting line (41), and a splitter (5). The lower housing (1) and the upper housing (2) are rotatably connected. The lower housing (1) and the upper housing (2) can be fixed after being closed. Multiple first top posts (1a) are vertically installed inside the lower housing (1). The lower housing (1) and the upper housing (2) are fixed by screwing the bolts through the upper housing (2) into the first top posts (1a). The positioning structure (3) is provided on the left side of the lower housing (1) to position the cable entering the lower housing (1). The splitter (5) is provided in the middle of the lower housing (1). A row of connectors (4) is provided on the right wall of the lower housing (1). The connectors (4) and the splitter (5) are connected by the connecting line (41). The main cable passes through the left wall of the lower housing (1) and is connected to the splitter (5). The main cable and the connecting line (41) are connected by squeezing from top to bottom.

2. The photovoltaic cable pre-branching device as described in claim 1, characterized in that: A row of wire clamping plates (2a) is provided on the inner side of the upper housing (2). The wire clamping plates (2a) are concave. After the lower housing (1) and the upper housing (2) are closed, the wire clamping plates (2a) are on the left side of the connector (4).

3. The photovoltaic cable pre-branching device as described in claim 1, characterized in that: The positioning structure (3) includes a positioning plate (31) and a limiting plate (32). The positioning plate (31) is provided on the left side of the lower housing (1). A row of wire grooves (31a) is opened on the upper side of the positioning plate (31). A limiting plate (32) is opened on the positioning plate (31) to the right of the wire grooves (31a).

4. A photovoltaic cable pre-branching device as described in claim 1, characterized in that: The branching device (5) includes a second top post (51), a fixing plate (52), a conductive post (53), a clamping bolt (54), and a clamping nut (55). A row of second top posts (51) is provided in the middle of the lower housing (1). A fixing plate (52) is connected between the top ends of the second top posts (51). A row of conductive posts (53) is provided on the fixing plate (52). The conductive posts (53) are annular. The clamping bolt (54) passes through the conductive posts (53) from bottom to top. The upper part of the clamping bolt (54) is connected to the clamping nut (55) by thread. The end of the main cable is connected to the lower part of the clamping bolt (54), and the end of the connecting line (41) is connected to the upper part of the clamping bolt (54).

5. A photovoltaic cable pre-branching device as described in claim 4, characterized in that: The cap of the clamping bolt (54) is diamond-shaped.

6. A photovoltaic cable pre-branching device as described in claim 5, characterized in that: The branching device (5) also includes a limiting post (56). The bottom of the fixing plate (52) on both sides of the head of the clamping bolt (54) is provided with a limiting post (56). The limiting post (56) fits against the diamond-shaped surface of the head of the clamping bolt (54).

7. A photovoltaic cable pre-branching device as described in claim 1, characterized in that: It also includes a protective cover (6), which is rotatably mounted on the top right side of the upper housing (2), and a wire hole (6a) is provided on the protective cover (6) on the right side of the connector (4).

8. A photovoltaic cable pre-branching device as described in claim 7, characterized in that: It also includes a pad (61), and a pad (61) is provided on the lower housing (1) below the protective cover (6).

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