Photovoltaic confluence cabinet

Abstract

The utility model discloses a photovoltaic confluence cabinet, which comprises a cabinet body and a support assembly arranged in the cabinet body, and is characterized in that the support assembly comprises two mounting racks which are oppositely arranged, the mounting racks extend along the height direction of the cabinet body, and fixing plates are arranged on the two mounting racks; wherein the fixing plate is provided with a plurality of bending parts which are bent inwards, and the plurality of bending parts are respectively used for installing a first installing plate, a second installing plate and a wire harness fixing frame which extend along the length direction of the cabinet body; the left end and the right end, in the length direction of the cabinet body, of the first installation plate, the second installation plate and the wire harness fixing frame are connected with the two fixing plates respectively. The photovoltaic confluence cabinet provided by the utility model is simple in structure, convenient for operators to maintain subsequently, good in expansibility, capable of separating high and low wires, and high in safety.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage equipment, in particular to a photovoltaic combiner cabinet. Background Art

[0002] In recent years, with the demand for clean energy in society, the field of photovoltaic power generation has also developed rapidly. Photovoltaic power generation systems are usually installed outdoors and are specifically used to convert solar energy into electrical energy. Among them, the photovoltaic combiner cabinet is one of the indispensable equipment in the photovoltaic power generation system. The photovoltaic combiner cabinet is used to combine the current input from the external photovoltaic inverter through the live circuit breaker and then output it to the distribution cabinet using the combiner copper bus to complete the combiner, overload protection and control the disconnection of each combiner input.

[0003] However, the inventors have found that the existing photovoltaic combiner cabinet has a complex structure and does not separate the high and low voltage lines, which is not conducive to subsequent maintenance and further expansion, and is not convenient for normal use by operators. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a photovoltaic combiner cabinet to solve the problems of the existing photovoltaic combiner cabinet having a complex structure and failing to separate high and low voltage lines, which is not conducive to subsequent maintenance and expansion.

[0005] In order to solve the above technical problems, the technical solution of the utility model is: a photovoltaic combiner cabinet, which includes a cabinet body and a bracket assembly arranged in the cabinet body, the bracket assembly includes two mounting frames arranged opposite to each other, the mounting frames extend along the height direction of the cabinet body, and the two mounting frames are provided with fixing plates;

[0006] Among them, the fixing plate is provided with a plurality of inwardly bent portions, and the plurality of bent portions are respectively used to install a first mounting plate, a second mounting plate and a wiring harness fixing frame extending along the length direction of the cabinet, so that the first mounting plate, the second mounting plate and the wiring harness fixing frame are respectively connected to the two fixing plates at the left and right ends in the length direction of the cabinet.

[0007] The beneficial effect of the present utility model is that in view of the problem that the existing photovoltaic junction cabinet has a relatively complex structure and does not separate the high and low voltage lines, which is not conducive to subsequent maintenance and further development, and is not convenient for normal use by operators, the inventor has optimized and designed a new photovoltaic junction cabinet. The photovoltaic junction cabinet has a relatively simple structure, and the operator can perform front maintenance. It has good expandability and can separate the high and low voltage lines. It has better implementation effect and higher safety. It can reduce the difficulty of later maintenance operations while effectively ensuring the safety of maintenance operations. It has good promotion prospects and application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 The schematic diagram is a schematic diagram of the structure of the photovoltaic combiner cabinet described in the utility model in one embodiment.

[0009] Figure 2 It is a structural explosion diagram of the photovoltaic combiner cabinet described in the utility model in one implementation manner.

[0010] Figure 3 This is a schematic structural diagram of the photovoltaic combiner cabinet of the present invention in one embodiment with the front door panel and the protective panel hidden.

[0011] Figure 4 for Figure 3 The enlarged view of the part A of the photovoltaic combiner shown.

[0012] Figure 5 for Figure 3 The structural front view of the photovoltaic combiner cabinet is shown.

[0013] Figure 6 for Figure 5 The BB section view of the PV combiner shown.

[0014] Description of labels:

[0015] 1. Cabinet; 101. Upper cover; 102. Lower base; 103. Support legs; 104. Mounting frame;

[0016] 2. Front door panel;

[0017] 3. Side door panels;

[0018] 4. Rear door panel;

[0019] 5. High voltage protection plate;

[0020] 6. Left side fixing plate;

[0021] 7. Right side fixing plate; 701. Bending part;

[0022] 8. First mounting plate;

[0023] 9. Second mounting plate;

[0024] 10. Operate the circuit breaker with power on;

[0025] 11. Air switch;

[0026] 12. Low voltage relay;

[0027] 13. AC / DC power supply;

[0028] 14. IO controller;

[0029] 15. Output busbar;

[0030] 16. Output copper busbar;

[0031] 17. Wire harness fixing bracket;

[0032] 18. Insulation column. DETAILED DESCRIPTION

[0033] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in conjunction with the implementation modes and the accompanying drawings.

[0034] As is known to all, the current photovoltaic combiner cabinet generally includes a cabinet body, and the cabinet body is generally provided with a receiving slot, and a vertically arranged mounting plate is installed in the receiving slot, and a plurality of DC circuit breakers are arranged on the mounting plate to work. However, such existing photovoltaic combiner cabinets require more steel wiring harnesses, which are complex, and do not separate high and low voltage wiring, which is not conducive to subsequent maintenance and further development, and is not convenient for normal use by operators.

[0035] Therefore, in order to solve the problems existing in the above-mentioned prior art, Figure 1 As shown, the utility model designs a photovoltaic combiner cabinet, which includes a cabinet body 1 and a bracket assembly arranged in the cabinet body 1, wherein the bracket assembly includes two mounting frames 104 arranged opposite to each other, the mounting frames 104 extend along the height direction of the cabinet body 1, and the two mounting frames 104 are both provided with fixing plates;

[0036] Among them, the fixing plate is provided with a plurality of inwardly bent portions 701, and the plurality of bent portions 701 are respectively used to install the first mounting plate 8, the second mounting plate 9 and the wire harness fixing frame 17 extending along the length direction of the cabinet 1, so that the first mounting plate 8, the second mounting plate 9 and the wire harness fixing frame 17 are respectively connected to the two fixing plates at the left and right ends in the length direction of the cabinet 1.

[0037] In the above technical solution of the utility model, the inventor has made a new design for the structure in the photovoltaic combiner cabinet, in which a fixing plate is provided on the photovoltaic combiner cabinet, and a plurality of inwardly bent portions 701 are provided on the fixing plate to install the first mounting plate 8, the second mounting plate 9 and the harness fixing frame 17 extending along the length direction of the cabinet body 1. In practical application, the first mounting plate 8 can be used to install and fix some common electrical components, such as: low voltage relay 12, IO controller 14; the second mounting plate 9 can be used to install the live circuit breaker 10.

[0038] In actual application, the structure of the photovoltaic junction cabinet is relatively simple, and its expandability is relatively good. More second mounting plates 9 can be installed in the cabinet 1 to expand the structure; and due to the reasonable design of the structure in the cabinet 1, the IO controller 14 on the first mounting plate 8 can be effectively connected with the low-voltage relay 12, and the low-voltage relay 12 can control the live circuit breaker 10 through the wire trough, and the connection line between the low-voltage relay 12 and the live circuit breaker 10 can be lowered from the fixed plate on one side of the cabinet 1, so as to realize the separation of high and low voltage lines. In addition, during actual installation, the wiring harness can also be arranged and fixed by the wiring harness fixing frame 17, so as to further improve the wiring effect and facilitate the subsequent maintenance of operators.

[0039] Furthermore, in the photovoltaic combiner cabinet described in the present invention, a plurality of harness installation through holes for passing the harness are provided on the harness fixing frame 17 , and the plurality of harness installation through holes are sequentially arranged along the length direction of the cabinet body 1 .

[0040] Furthermore, in the photovoltaic combiner cabinet described in the present invention, the cabinet body 1 includes an upper cover plate 101 and a lower base plate 102 , one end of the mounting frame 104 is connected to the upper cover plate 101 , and the other end of the mounting frame 104 is connected to the lower base plate 102 .

[0041] Furthermore, in the photovoltaic junction cabinet described in the utility model, the upper cover plate 101 and the lower base plate 102 are both rectangular plates, and the cabinet body 1 also includes a front door panel 2, a left door panel, a rear door panel 4 and a right door panel; wherein the front door panel 2, the left door panel, the rear door panel 4 and the right door panel are connected end to end in sequence and are arranged on the four sides of the upper cover plate 101 and the lower base plate 102 to enclose the cabinet body 1.

[0042] Furthermore, the photovoltaic combiner cabinet described in the present invention also includes a high-voltage protection plate 5, which is arranged in the cabinet body 1, and the high-voltage protection plate 5 is respectively connected to the two mounting frames 104 at the left and right ends in the length direction of the cabinet body 1.

[0043] Furthermore, the photovoltaic combiner cabinet described in the utility model also includes a live circuit breaker 10 , and the live circuit breaker 10 is arranged on the second mounting plate 9 .

[0044] Furthermore, in the photovoltaic busbar cabinet described in the present invention, the second mounting plate 9 is flanged backward to obtain a flanged portion, and the flanged portion is used to install an insulating column 18 , and an output busbar 15 is arranged on the insulating column 18 .

[0045] Furthermore, the photovoltaic busbar cabinet described in the present invention further includes an output copper bar 16 , and the output copper bar 16 is connected to the live circuit breaker 10 and the output busbar 15 respectively provided on the second mounting plate 9 .

[0046] Furthermore, in the photovoltaic junction cabinet described in the utility model, an opening is provided at the bottom of the cabinet body 1, and the inverter wiring harness input from the outside enters the cabinet body 1 from the opening and is fixed on the wiring harness fixing frame 17, and then the wiring harness is connected to the live circuit breaker 10, and then passes through the output copper bus 16 to the output bus copper bus 15, and finally passes through the wiring harness mounting hole of the wiring harness fixing frame 17 for fixing.

[0047] Furthermore, the photovoltaic junction cabinet described in the utility model also includes an AC / DC power supply 13, an IO controller 14 and multiple low-voltage relays 12, and the AC / DC power supply 13, the IO controller 14 and the multiple low-voltage relays 12 are all arranged in the cabinet 1, and the AC / DC power supply 13 is used to convert the external input 220V voltage into 24V, thereby supplying power to the IO controller 14 and the multiple low-voltage relays 12.

[0048] Embodiment 1:

[0049] like Figure 1-Figure 6 It can be seen that the first embodiment of the utility model is: a photovoltaic junction cabinet, which includes a cabinet body 1 and a bracket assembly arranged in the cabinet body 1, the cabinet body 1 can be specifically set as a cabinet with a length, width and height of 596mm*725mm*2300mm, and the cabinet body 1 specifically includes an upper cover plate 101, a lower bottom plate 102, a front door plate 2, a rear door plate 4 and two side door plates 3. Among them, in this embodiment, the two side door plates 3 are respectively a left door plate and a right door plate, the upper cover plate 101 and the lower bottom plate 102 are both rectangular plates, and the front door plate 2, the left door plate, the rear door plate 4 and the right door plate are sequentially connected end to end and arranged on the four sides of the upper cover plate 101 and the lower bottom plate 102 to enclose the cabinet body 1.

[0050] It should be noted that see Figure 2 and Figure 3 It can be seen that in this embodiment, the bracket assembly includes two mounting frames 104 arranged opposite to each other, each of the two mounting frames 104 includes two support rods, and the mounting frames 104 extend along the height direction of the cabinet 1, and the two mounting frames 104 are provided with fixing plates, namely the left fixing plate 6 and the right fixing plate 7. Among them, the two fixing plates are provided with a plurality of bending portions 701 bent toward the inside of the cabinet 1 (see Figure 4), multiple bending portions 701 can be used to respectively install the first mounting plate 8, the second mounting plate 9 and the wire harness fixing frame 17 extending along the length direction of the cabinet 1, so that the first mounting plate 8, the second mounting plate 9 and the wire harness fixing frame 17 are respectively connected to the left fixing plate 6 and the right fixing plate 7 at the left and right ends in the length direction of the cabinet 1.

[0051] Among them, see Figure 4 It can be seen that the reason why the left fixing plate 6 and the right fixing plate 7 are used to fix the first mounting plate 8, the second mounting plate 9 and the wiring harness fixing frame 17 by bending is that: the bending and flanging method reduces welding while ensuring the position accuracy of the mounting holes, achieving a simple structure and low cost.

[0052] Accordingly, in this embodiment, the front door panel 2 and the rear door panel 4 can be opened and closed by door pins when they are set, and the left door panel and the right side panel can be installed on both sides by two door buckles, so that the left door panel and the right side panel can be fixedly matched with the two support rods of the mounting frame 104. In addition, when the mounting frame 104 is set, one end of the two mounting frames 104 can be connected and fixed to the upper cover plate 101, and the other end of the two mounting frames 104 can be connected and fixed to the lower base plate 102; in addition, a plurality of harness installation through holes for passing the harness are provided on the harness fixing frame 17, and the plurality of harness installation through holes can be arranged in sequence along the length direction of the cabinet 1 to facilitate the fixing of the harness.

[0053] In addition, see Figure 2 It can be seen that in this embodiment, a high-voltage protection plate 5 is also included. The high-voltage protection plate 5 is arranged in the cabinet 1, and the left and right ends of the high-voltage protection plate 5 in the length direction of the cabinet 1 are fixedly connected to the two mounting frames 104 by bolts respectively, so that when the operator opens the front door panel 2, only the live circuit breaker 10 and the operating surface of the circuit breaker are exposed, thereby ensuring the safety of the user's operation.

[0054] It should be noted that in this embodiment, during the specific installation, a live operated circuit breaker 10 can be provided on the second mounting plate 9, and the live operated circuit breaker 10 can be fixed on the second mounting plate 9 by bolts, and the second mounting plate 9 can be flanging backward to obtain a flanging portion, so as to use the flanging portion to install the insulating column 18, and the output bus copper bar 15 is fixed on the insulating column 18 by bolts, and the output bus copper bar 15 includes three phases A, B, and C. At this time, the output copper bar 16 can connect the live operated circuit breaker 10 with the output bus copper bar 15 by bolts, and the insulating column output and the live operated circuit breaker 10 are both installed on the second mounting plate 9, which can effectively reduce the assembly size tolerance, achieve better assembly, and improve the assembly effect.

[0055] In the photovoltaic combiner cabinet designed in the present invention, the cabinet body 1 may specifically include a main circuit and a control circuit, wherein the specific electrical connection relationship between the main circuit and the control circuit is as follows:

[0056] Main circuit: The lower base plate 102 of the cabinet 1 is provided with an opening, and the inverter wiring harness input from the outside enters the cabinet 1 from the opening of the lower base plate 102, and the wiring harness is fixed to the wiring harness fixing frame 17 by a cable tie, and then connected to the live circuit breaker 10, through the output copper bus 16 to the output bus copper bus 15, and finally through the wiring harness installation hole of the wiring harness fixing frame 17 for fixing, and finally connected to the distribution cabinet.

[0057] Control circuit: The cabinet 1 is provided with an AC / DC power supply 13, an IO controller 14, an air switch 11 and a plurality of low-voltage relays 12. The IO controller 14 and the plurality of low-voltage relays 12 are specifically arranged on the first mounting plate 8. When the external 220V power supply enters the cabinet 1, after passing through the front wire groove of the left fixing plate 66, the 220V voltage can be converted into 24V through the AC / DC power supply 13, thereby supplying power to the IO controller 14 and the plurality of low-voltage relays 12. In this embodiment, the IO controller 14 has 8 interfaces, and the IO controller 14 controls 8 low-voltage relays 12, and thereby controls 4 live circuit breakers 10 to realize the opening and closing of the main bus.

[0058] It should be noted that, in this embodiment, the IO controller 14 is connected to the low-voltage relay 12, and the low-voltage relay 12 is connected to the live circuit breaker 10 through the right wire duct to control the live circuit breaker 10, and the connection line between the low-voltage relay 12 and the live circuit breaker 10 can be lowered from the right fixing plate 7 of the cabinet 1, so as to realize the separation of high and low voltage lines. The left wire duct of the cabinet 1 is used to place the 220V wire harness, and the right wire duct of the cabinet 1 and the first mounting plate 8 are used to place the low-voltage wire harness. In addition, during actual installation, the wire harness can also be arranged and fixed by the wire harness fixing frame 17, so as to further improve the wiring effect and facilitate the subsequent maintenance of the operator. At the same time, for ease of use, four legs 103 are also provided on the lower surface of the lower bottom plate of the cabinet of the photovoltaic junction cabinet in this embodiment to support the above cabinet.

[0059] It can be seen that the photovoltaic combiner cabinet of the present invention can realize the four-in-one combination of the AC current coming from the photovoltaic inverter, and can be expanded into three-in-one, two-in-one and other modules by reducing the live circuit breaker 10 and the second mounting plate 9.

[0060] From the above, it can be seen that in the present invention, in view of the problem that the existing photovoltaic junction cabinet has a relatively complex structure and does not separate the high and low voltage lines, which is not conducive to subsequent maintenance and further expansion, and is not convenient to use, the inventor has optimized and designed a new photovoltaic junction cabinet. The structure of the photovoltaic junction cabinet is relatively simple, and the operator can perform front maintenance. It has good expandability and can separate the high and low voltage lines. It has better implementation effect and higher safety. It can reduce the difficulty of later maintenance operations while effectively ensuring the safety of maintenance operations. It has good promotion prospects and application value.

[0061] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. A photovoltaic combiner cabinet, comprising a cabinet body and a bracket assembly arranged in the cabinet body, characterized in that: The bracket assembly includes two mounting frames arranged opposite to each other, the mounting frames extend along the height direction of the cabinet, and both mounting frames are provided with fixing plates; Among them, the fixing plate is provided with a plurality of inwardly bent portions, and the plurality of bent portions are respectively used to install a first mounting plate, a second mounting plate and a wiring harness fixing frame extending along the length direction of the cabinet, so that the first mounting plate, the second mounting plate and the wiring harness fixing frame are respectively connected to the two fixing plates at the left and right ends in the length direction of the cabinet.

2. The photovoltaic combiner cabinet according to claim 1, characterized in that: A plurality of harness installation through holes for passing the harness are provided on the harness fixing frame, and the plurality of harness installation through holes are arranged in sequence along the length direction of the cabinet.

3. The photovoltaic combiner cabinet according to claim 1, characterized in that: The cabinet comprises an upper cover plate and a lower base plate, one end of the mounting frame is connected to the upper cover plate, and the other end of the mounting frame is connected to the lower base plate.

4. The photovoltaic combiner cabinet according to claim 3, characterized in that: The upper cover plate and the lower base plate are both rectangular plates, and the cabinet body also includes a front door plate, a left door plate, a rear door plate and a right door plate; wherein the front door plate, the left door plate, the rear door plate and the right door plate are connected end to end in sequence and are arranged on the four sides of the upper cover plate and the lower base plate to enclose the cabinet body.

5. The photovoltaic combiner cabinet according to claim 1, characterized in that: It also includes a high-voltage protection plate, which is arranged in the cabinet, and the left and right ends of the high-voltage protection plate in the length direction of the cabinet are respectively connected to the two mounting frames.

6. The photovoltaic combiner cabinet according to claim 1, characterized in that: It also includes a live circuit breaker, which is arranged on the second mounting plate.

7. The photovoltaic combiner cabinet according to claim 6, characterized in that: The second mounting plate is flanged backward to obtain a flanged portion, and the flanged portion is used to install an insulating column, and an output busbar is arranged on the insulating column.

8. The photovoltaic combiner cabinet according to claim 7, characterized in that: It also includes an output copper bar, and the output copper bar is respectively connected to the live circuit breaker and the output bus copper bar arranged on the second mounting plate.

9. The photovoltaic combiner cabinet according to claim 8, characterized in that: An opening is provided at the bottom of the cabinet, and the inverter wiring harness input from the outside enters the cabinet from the opening and is fixed on the wiring harness fixing frame. Then, after the wiring harness is connected to the live circuit breaker, it passes through the output copper bus to the output bus copper bus, and finally passes through the wiring harness mounting hole of the wiring harness fixing frame for fixing.

10. The photovoltaic combiner cabinet according to claim 1, characterized in that: It also includes an AC / DC power supply, an IO controller and multiple low-voltage relays, which are all arranged in the cabinet, and the AC / DC power supply is used to convert the external input 220V voltage into 24V, thereby supplying power to the IO controller and the multiple low-voltage relays.

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