Input and output line fixing bridge special for photovoltaic combiner box and photovoltaic system

Abstract

The utility model aims to disclose a photovoltaic combiner box special-purpose input and output line fixing bridge and a photovoltaic system, and relates to the photovoltaic combiner box technology field, and the photovoltaic combiner box special-purpose input and output line fixing bridge comprises a first support, a second support, a combiner box and a cable accommodation cavity; the combiner box is installed on the first support. The second bracket comprises a U-shaped part and a vertical part; the cross section of the cable containing cavity is in a Y shape or a flat L shape, the cable containing cavity comprises a top opening, a bottom opening, a rear wall, a side wall and a front door body, the vertical part is installed on the outer wall of the rear wall, and a plurality of rows of cable fixing holes in the horizontal direction are formed in the inner wall of the rear wall. The cross section of the cable containing cavity is in a Y shape or a flat L shape, and a plurality of rows of cable fixing holes in the horizontal direction are formed in the inner wall of the rear wall of the cable containing cavity. The cable accommodating cavity and the combiner box form a structure which is fastened together; and the input wire and the output wire are fastened in the cable accommodating cavity, so that the wind resistance is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic combiner boxes, in particular to a special input and output line fixing bridge for photovoltaic combiner boxes and a photovoltaic system. Background Art

[0002] In a photovoltaic power generation system, a photovoltaic combiner box is a wiring device that ensures the orderly connection and convergence of photovoltaic modules. A combiner box connects a certain number of photovoltaic cells of the same specifications in series to form a photovoltaic string. Several photovoltaic strings are then connected in parallel to the combiner box. After the power is combined within the combiner box, a complete photovoltaic power generation system is constructed through the use of a controller, DC distribution cabinet, photovoltaic inverter, AC distribution cabinet, and other supporting devices, achieving grid connection with the mains.

[0003] At present, the input and output lines of the photovoltaic combiner box are easily affected by wind, especially in windy and sandy environments. The input and output lines swing repeatedly under the influence of wind, and the connection points of the input and output lines are prone to breakage. In the worst case, the current of some photovoltaic modules cannot be combined, and in the worst case, the entire photovoltaic system will fail, which increases the maintenance cost of the photovoltaic system.

[0004] In view of this, it is necessary to develop a photovoltaic combiner box dedicated input and output line fixing bridge and photovoltaic system to overcome the above defects. Summary of the Invention

[0005] In order to solve the above technical problems, the purpose of the present utility model is to disclose a photovoltaic combiner box dedicated input and output line fixing bridge and a photovoltaic system.

[0006] The first invention object of the present utility model is to provide a dedicated input and output line fixing bridge for a photovoltaic combiner box.

[0007] The second object of the present invention is to provide a photovoltaic system.

[0008] To achieve the above-mentioned first utility model object, the utility model provides a photovoltaic combiner box dedicated input and output line fixing bridge, including a first bracket, a second bracket, a combiner box and a cable accommodating cavity;

[0009] The combiner box is installed on the first bracket;

[0010] The second bracket includes a U-shaped portion and a vertical portion, and the U-shaped portion is mounted on the first bracket;

[0011] The cross-section of the cable accommodating chamber is Y-shaped or flat L-shaped, and the cable accommodating chamber includes a top opening, a bottom opening, a rear wall, side walls, and a front door, and the width of the bottom opening is smaller than the width of the top opening;

[0012] The vertical portion is mounted on the outer wall of the rear wall, and a plurality of rows of horizontal cable fixing holes are arranged on the inner wall of the rear wall.

[0013] Preferably, the first bracket is parallel to the ground.

[0014] Preferably, the shape of the top opening matches the shape of the bottom of the combiner box.

[0015] Preferably, the upward projection of the bottom opening is located in the middle or edge of the top opening.

[0016] Preferably, a first row of cable fixing holes, a second row of cable fixing holes and a third row of cable fixing holes are provided on the inner wall of the rear wall.

[0017] Preferably, the input line includes a first bare wire portion and a first sleeve portion, the first sleeve portion is fixed to the first row of cable fixing holes through a first pipe clamp, and the first bare wire portion is fixed to the second row of cable fixing holes and the third row of cable fixing holes through a second pipe clamp and a third pipe clamp.

[0018] Preferably, the first bare wire portions are arranged in a flat U-shape between the second row of cable fixing holes and the third row of cable fixing holes.

[0019] Preferably, the output line includes a second bare wire portion and a second sleeve portion, the second sleeve portion is fixed to the first row of cable fixing holes through a fourth pipe clamp, and the second bare wire portion is fixed to the second row of cable fixing holes and the third row of cable fixing holes through a fifth pipe clamp and a sixth pipe clamp.

[0020] Preferably, the output line is connected to the combiner box in a vertical state.

[0021] Based on the same inventive principle, in order to achieve the above-mentioned second invention purpose, the present invention provides a photovoltaic system, including several photovoltaic modules, and the input lines of several of the photovoltaic modules are connected to the combiner box through the photovoltaic combiner box dedicated input and output line fixed bridge frame described in the first invention.

[0022] Compared with the prior art, the technical effects of this utility model are as follows:

[0023] The junction box is installed above the first bracket in a horizontal state, and the U-shaped part of the second bracket is installed on the first bracket, and the width of the U-shaped part exceeds the width of the junction box; the vertical part includes a top and a bottom end, the top end is installed on the U-shaped part, and the bottom end is installed on the outer wall of the rear wall of the cable accommodating cavity, that is, the cable accommodating cavity is fixed to the bottom of the junction box by the second bracket; the cross-section of the cable accommodating cavity is Y-shaped or flat L-shaped, and a plurality of rows of horizontal cable fixing holes are provided on the inner wall of the rear wall of the cable accommodating cavity, and the input and output lines are fastened through the plurality of rows of horizontal cable fixing holes and then connected from the bottom of the junction box; on the one hand, the second bracket fixes the cable accommodating cavity to the bottom of the junction box, so that the cable accommodating cavity and the junction box become a structure fastened together; on the other hand, the input and output lines are fastened in the cable accommodating cavity, which can significantly improve the wind resistance of the input and output lines, and the probability of the input and output lines being blown off by the wind is basically eliminated. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 This is a main schematic diagram of the input and output line fixing bridge frame dedicated to the practical photovoltaic combiner box.

[0026] Figure 2 This is a schematic diagram of the main view of the second bracket, combiner box and cable accommodating cavity of the present invention.

[0027] Figure 3 This is a schematic main view of the combiner box and the cable accommodating cavity of the present invention.

[0028] Figure 4 It is a schematic main view of the Y-shaped cable accommodating chamber of the present invention.

[0029] Figure 5 It is a schematic diagram of the three-dimensional structure of the second bracket of the utility model.

[0030] Among them, 1. first bracket; 2. second bracket; 21. U-shaped part; 211. horizontal plate; 212. first vertical plate; 213. second vertical plate; 22. vertical part; 221. top; 222. bottom; 3. junction box; 4. cable accommodating chamber; 41. top opening; 42. bottom opening; 43. rear wall; 44. side wall; 5. cable fixing hole; 51. first row of cable fixing holes; 52. second row of cable fixing holes; 53. third row of cable fixing holes; 6. ground; 7. input line; 71. first bare wire part; 711. second pipe clamp; 712. third pipe clamp; 72. first casing part; 721. first pipe clamp; 8. photovoltaic module; 81. second bare wire part; 811. fifth pipe clamp; 812. sixth pipe clamp; 82. second casing part; 821. fourth pipe clamp; 9. protective tube. DETAILED DESCRIPTION

[0031] The present invention is described in detail below with reference to the various embodiments shown in the accompanying drawings. However, it should be noted that these embodiments are not limitations of the present invention, and any equivalent transformations or substitutions in functions, methods, or structures made by ordinary technicians in this field based on these embodiments are all within the scope of protection of the present invention.

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0033] Example 1

[0034] Ginseng Figures 1 to 5 As shown, this embodiment discloses a specific implementation of a dedicated input and output line fixing bridge for a photovoltaic combiner box.

[0035] Photovoltaic combiner box dedicated input and output line fixed bridge, reference Figures 1 to 5 , including a first bracket 1, a second bracket 2, a junction box 3 and a cable accommodating chamber 4; the junction box 3 is mounted on the first bracket 1; the second bracket 2 includes a U-shaped portion 21 and a vertical portion 22, the U-shaped portion 21 is mounted on the first bracket 1; the cross section of the cable accommodating chamber 4 is Y-shaped or flat L-shaped, the Y-shaped cross section see Figure 4 , flat L-shaped see Figure 2The cable accommodating chamber 4 includes a top opening 41, a bottom opening 42, a rear wall 43, a side wall 44 and a front door body. The front door body is hinged to the side wall 44. The width of the bottom opening 42 is smaller than the width of the top opening 41; the vertical portion 22 is installed on the outer wall of the rear wall 43, and several rows of horizontal cable fixing holes 5 are set on the inner wall of the rear wall 43.

[0036] Specifically, see Figures 1 to 5 , the first bracket 1 is parallel to the ground 6, and the junction box 3 is installed above the first bracket 1 in a horizontal state; the U-shaped portion 21 includes a horizontal plate 211 and a first vertical plate 212 and a second vertical plate 213 arranged at both ends of the horizontal plate, the first vertical plate 212 and the second vertical plate 213 are installed on the first bracket 1, and the width of the U-shaped portion 21 exceeds the width of the junction box 3; the vertical portion 22 includes a top end 221 and a bottom end 222, the top end 221 is installed on the horizontal plate 211, the horizontal plate 211 is installed on the outer wall of the top of the rear wall 43, and the bottom end 222 is installed on the outer wall of the rear wall 43 of the cable accommodating cavity 4, that is, the cable accommodating cavity 4 is fixed to the bottom of the junction box 3 by the second bracket 2, the shape of the top opening 41 is consistent with the shape of the bottom of the junction box 3, and the top The cavity surrounded by the opening 41, the rear wall 43, the side walls 44 and the front door body closes the bottom of the flow box 3, effectively blocking the column wind; the cross-section of the cable accommodating chamber 4 is Y-shaped or flat L-shaped, and a number of rows of horizontal cable fixing holes 5 are provided on the inner wall of the rear wall 43 of the cable accommodating chamber 4. The input line 7 and the output line 8 are fastened through the several rows of horizontal cable fixing holes 5 and then connected from the bottom of the junction box 3; on the one hand, the second bracket 2 fixes the cable accommodating chamber 4 to the bottom of the junction box 3, so that the cable accommodating chamber 4 and the junction box 3 become a structure fastened together; on the other hand, the input line 7 and the output line 8 are fastened in the cable accommodating chamber 4, which can significantly improve the wind resistance of the input line 7 and the output line 8, and the probability of the input line 7 and the output line 8 being blown off by the wind is basically eliminated.

[0037] See also Figure 3 and Figure 4 The upward projection of the bottom opening 42 is located in the middle or edge of the top opening 41; when the upward projection of the bottom opening 42 is located in the middle of the top opening 41, the cross-section of the cable accommodating chamber 4 is Y-shaped; when the upward projection of the bottom opening 42 is located at the edge of the top opening 41, the cross-section of the cable accommodating chamber 4 is a flat L-shape; either the Y-shape or the flat L-shape can make the width of the bottom opening 42 smaller than the width of the top opening 41, which can not only improve the applicable scenarios of the cable accommodating chamber 4, but also reduce the entry of sand and dust into the cable accommodating chamber 4.

[0038] See also Figure 3 and Figure 4In order to further fasten the input line 7 and the output line 8, a first row of cable fixing holes 51, a second row of cable fixing holes 52 and a third row of cable fixing holes 53 are provided on the inner wall of the rear wall 43. The first row of cable fixing holes 51 is close to the bottom opening 42, the third row of cable fixing holes 53 is close to the top opening 41, and the second row of cable fixing holes 52 is located between the first row of cable fixing holes 51 and the third row of cable fixing holes 53; the input line 7 includes a first bare wire portion 71 and a first sleeve portion 72. The first sleeve portion 72 refers to the portion of the input line 7 that is inserted into the protective tube 9. The first sleeve portion 72 is fixed to the first row of cable fixing holes 51 by a first pipe clamp 721. The first bare wire portion 71 is passed through The first bare wire portion 71 is fixed to the second row of cable fixing holes 52 and the third row of cable fixing holes 53 through the second pipe clamp 711 and the third pipe clamp 712; the first bare wire portion 71 is arranged in a flat U-shape between the second row of cable fixing holes 52 and the third row of cable fixing holes 53. The flat U-shape allows a redundant length of the input line 7 to be stored in the cable accommodating cavity 4. Once the joint of the input line 7 is damaged, the redundant input line 7 can be directly used, which is convenient for later maintenance and inspection; in addition, the first bare wire portion 71 and the first sleeve portion 72 of the input line 7 are both fixed by the pipe clamps, and combined with the outer shell protection formed by the cable accommodating cavity 4, the situation where the input line 7 is disturbed by wind is almost eliminated.

[0039] See also Figure 3 and Figure 4 The output line 8 includes a second bare wire portion 81 and a second sleeve portion 82. The second sleeve portion 82 refers to the portion of the output line 8 that is sleeved into the protective tube 9. The second sleeve portion 82 is fixed to the first row of cable fixing holes 51 by the fourth pipe clamp 821, and the second bare wire portion 81 is fixed to the second row of cable fixing holes 52 and the third row of cable fixing holes 53 by the fifth pipe clamp 811 and the sixth pipe clamp 812. The output line 8 is connected to the junction box 3 in a vertical state, and the output line 8 outputs alternating current. The second bare wire portion 81 and the second sleeve portion 82 of the output line 8 are both fixed by the pipe clamp, and combined with the outer shell protection formed by the cable accommodating cavity 4, the output line 8 is almost eliminated from wind interference.

[0040] See also Figures 3 to 5 In order to improve the structural stability of the second bracket 2, the horizontal plate 211 is selected as an L-shaped plate; in order to improve the corrosion resistance of the second bracket 2, the junction box 3 and the cable accommodating cavity 4, all of them are made of plain galvanized plates.

[0041] Example 2

[0042] This embodiment discloses a photovoltaic system, comprising a plurality of photovoltaic modules, wherein the input lines 7 of the plurality of photovoltaic modules are connected to the combiner box 3 via the photovoltaic combiner box dedicated input and output line fixed bridge described in Example 1, and the output lines 8 are output from the combiner box 3 via the photovoltaic combiner box dedicated input and output line fixed bridge described in Example 1, so that the input lines 7 and the output lines 8 are protected by the cable accommodating cavity 4 and a plurality of pipe clamps at the same time, and the external wind force no longer causes the connection between the input line 7 and the combiner box 3 to swing, nor does it cause the connection between the output line 8 and the combiner box 3 to swing, and the input line 7 and the output line 8 are not easily broken.

[0043] The photovoltaic system disclosed in this embodiment has the same technical solutions as those in Example 1. Please refer to Example 1 and will not repeat them here.

Claims

1. Photovoltaic combiner box dedicated input and output line fixed bridge, characterized by: It includes a first bracket, a second bracket, a junction box and a cable accommodating cavity; The combiner box is installed on the first bracket; The second bracket includes a U-shaped portion and a vertical portion, and the U-shaped portion is mounted on the first bracket; The cross-section of the cable accommodating chamber is Y-shaped or flat L-shaped, and the cable accommodating chamber includes a top opening, a bottom opening, a rear wall, side walls, and a front door, and the width of the bottom opening is smaller than the width of the top opening; The vertical portion is mounted on the outer wall of the rear wall, and a plurality of rows of horizontal cable fixing holes are arranged on the inner wall of the rear wall.

2. The photovoltaic combiner box dedicated input and output line fixing bridge according to claim 1, characterized in that: The first bracket is parallel to the ground.

3. The photovoltaic combiner box dedicated input and output line fixing bridge according to claim 1, characterized in that: The shape of the top opening matches the shape of the bottom of the combiner box.

4. The photovoltaic combiner box dedicated input and output line fixing bridge according to claim 1, characterized in that: The upward projection of the bottom opening is located at the middle or edge of the top opening.

5. The dedicated input and output line fixing bridge for photovoltaic combiner boxes according to any one of claims 1 to 4, characterized in that: A first row of cable fixing holes, a second row of cable fixing holes and a third row of cable fixing holes are provided on the inner wall of the rear wall.

6. The photovoltaic combiner box dedicated input and output line fixing bridge according to claim 5, characterized in that: The input line includes a first bare wire portion and a first sleeve portion. The first sleeve portion is fixed to the first row of cable fixing holes through a first pipe clamp, and the first bare wire portion is fixed to the second row of cable fixing holes and the third row of cable fixing holes through a second pipe clamp and a third pipe clamp.

7. The photovoltaic combiner box dedicated input and output line fixing bridge according to claim 6, characterized in that: The first bare wire portions are arranged in a flat U-shape between the second row of cable fixing holes and the third row of cable fixing holes.

8. The photovoltaic combiner box dedicated input and output line fixing bridge according to claim 5, characterized in that: The output line includes a second bare wire portion and a second sleeve portion. The second sleeve portion is fixed to the first row of cable fixing holes through a fourth pipe clamp, and the second bare wire portion is fixed to the second row of cable fixing holes and the third row of cable fixing holes through a fifth pipe clamp and a sixth pipe clamp.

9. The photovoltaic combiner box dedicated input and output line fixing bridge according to claim 5, characterized in that: The output line is connected to the combiner box in a vertical state.

10. A photovoltaic system, characterized in that The invention comprises a plurality of photovoltaic modules, and the input lines of the plurality of photovoltaic modules are connected to the combiner box via the photovoltaic combiner box dedicated input and output line fixing bridge frame as described in any one of claims 1-9.

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