Emergency cut-off safety protection device for photovoltaic power generation bus line

Abstract

The utility model relates to the technical field of photovoltaic power generation, and discloses a photovoltaic power generation confluence line emergency cut-off safety protection device which comprises a confluence box, an electric element assembly is arranged in an inner cavity of the confluence box, a box cover is hinged to one end of the upper surface of the confluence box, and a fault indicating lamp and an operation indicating lamp are arranged on the upper surface of the box cover. Through the cooperation among the electric element assembly, the fault indicating lamp and the operation indicating lamp, the fault indicating lamp is convenient for a worker to check and process on site, the operation indicating lamp flickers to remind the worker to get close to check, the monitoring unit monitors the connection of a line, and the remote server receives and sends an instruction. Therefore, a line power supply is cut off emergently, a worker can carry out line confluence disconnection remotely, the service life of the combiner box is prolonged, the audible and visual alarm is started to remind nearby workers, and dangerous factors of personal safety are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic power generation, in particular to a photovoltaic power generation busbar circuit emergency cut-off safety protection device. Background Art

[0002] In industrial distributed photovoltaic power generation projects, due to the large power load, the installed capacity of distributed photovoltaic is also relatively large, usually at the megawatt level. Distributed photovoltaic modules generally include two major components: solar cells and inverters. According to the installed capacity of the actual project, inverters of different powers are selected, such as 20KW, 100KW, 500KW, etc., and industrial distributed photovoltaic systems usually have multiple inverters, and different inverters are connected to photovoltaic panels in different areas.

[0003] At present, the quality of domestic photovoltaic cell modules and inverter equipment is relatively stable, but different projects have their own risk factors. These internal or external risk factors can directly lead to inverter damage or more serious accidents such as fire.

[0004] When an inverter spontaneous combustion event or other serious events occur, it is usually necessary for people to arrive at the scene as soon as possible for emergency processing. However, when people arrive at the scene, due to the high temperature or fire of the inverter, they cannot immediately cut off the line between the photovoltaic cell and the inverter, which is likely to cause a more serious accident. Therefore, we need to propose a photovoltaic power generation bus line emergency cut-off safety protection device. Utility Model Content

[0005] The purpose of the utility model is to provide a photovoltaic power generation bus line emergency cut-off safety protection device, which can cut off the bus line in time and greatly reduce the risk factors of personal safety, so as to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a photovoltaic power generation busbar emergency cut-off safety protection device, comprising a combiner box, an inner cavity of the combiner box is provided with an electric component assembly, a box cover is hingedly connected to one end of the upper surface of the combiner box, and a fault indicator light and an operation indicator light are provided on the upper surface of the box cover;

[0007] The electrical component assembly includes a main board, a junction box is arranged at one end of the upper surface of the main board, two groups of incoming circuit breakers are symmetrically arranged on the upper surface of the main board, two groups of outgoing circuit breakers are arranged on the upper surface of the main board, and the two groups of outgoing circuit breakers are arranged between the two groups of incoming circuit breakers, and a monitoring unit, a monitoring power supply, a remote server and an audible and visual alarm are arranged on the upper surface of the main board.

[0008] Preferably, positioning bolts are provided at the four end corners of the upper surface of the main board, and the main board is in a square plate shape.

[0009] Preferably, the monitoring power supply is electrically connected to the remote server, the sound and light alarm and the monitoring unit respectively, and a plurality of groups of wiring terminals are arranged on one side of the combiner box, and the plurality of groups of wiring terminals are arranged in a rectangular array.

[0010] Preferably, a plurality of groups of support blocks are arranged at the bottom of the inner cavity of the combiner box, the main board is arranged on the plurality of groups of support blocks, and the plurality of groups of positioning bolts all penetrate the main board and are bolted to the support blocks.

[0011] Preferably, a radiator is provided on one side of the inner cavity of the combiner box, and the radiator is a heat dissipation fan, and a plurality of groups of heat dissipation fins are provided on the other side of the inner cavity of the combiner box.

[0012] Preferably, the combiner box is provided with multiple groups of heat dissipation holes on one side adjacent to the multiple groups of wiring terminals, and a limiting component is provided on the side opposite to the multiple groups of heat dissipation holes of the combiner box, two groups of ear plates are provided on one side of the box cover, two groups of flip buckles are provided on one side of the box cover, and an observation window is provided on the upper surface of the box cover.

[0013] Preferably, the limit assembly includes two groups of fixed seats and two groups of positioning blocks, a rotating sleeve is rotatably connected between the two groups of fixed seats, and both ends of the rotating sleeve are threadedly connected to the limit rod, and guide blocks are provided on the outer sides of the two groups of limit rods, and the opposite sides of the two groups of positioning blocks are in conflict with the opposite ends of the two groups of limit rods.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The utility model mainly cooperates between the electrical component assembly, the fault indicator light and the operation indicator light. The fault indicator light is used to facilitate the staff to check and handle on site, and the operation indicator light flashes to remind the staff to check closer. At the same time, the connection of the line is monitored by the monitoring unit, and the remote server receives and sends instructions to disconnect the line power supply urgently, so that the staff can remotely disconnect the line junction, thereby increasing the service life of the junction box, and at the same time, the sound and light alarm is activated to remind nearby staff, reducing the risk factors of personal safety.

[0016] 2. The utility model achieves the coordination among the heat dissipation fins, the heat sink and the limit assembly, and drives the two sets of limit rods to move in the fixed seat by rotating the rotating sleeve, thereby converting the threaded rotation into linear movement, so that the limit rods abut against the positioning block, thereby fixing the flip buckle on the positioning block, and the box cover is convenient to open and close, and the air circulation rate in the junction box is accelerated through the radiator, thereby cooperating with the heat dissipation fins to improve the heat dissipation efficiency in the junction box, improve the heat dissipation efficiency of the electrical component assembly, and further improve the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the combiner box of the utility model when it is opened;

[0018] Figure 2 This is a schematic diagram of the structure of the electrical component assembly of the utility model;

[0019] Figure 3 This is a schematic diagram of the internal structure of the combiner box of the present utility model.

[0020] In the figure: 1. combiner box; 2. box cover; 3. flip buckle; 4. observation window; 5. fault indicator light; 6. operation indicator light; 7. electrical component assembly; 71. main board; 72. junction box; 73. incoming circuit breaker; 74. monitoring unit; 75. monitoring power supply; 76. outgoing circuit breaker; 77. remote server; 78. sound and light alarm; 79. positioning bolt; 8. radiator; 9. cooling fin; 10. terminal; 11. limit assembly; 111. fixing seat; 112. rotating sleeve; 113. limit rod; 114. guide block; 115. positioning block; 12. ear plate; 13. support block; 14. heat dissipation hole. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-3 The utility model provides a technical solution: a photovoltaic power generation busbar line emergency cut-off safety protection device, comprising a busbar box 1, an electric component assembly 7 is arranged in the inner cavity of the busbar box 1, a box cover 2 is hinged at one end of the upper surface of the busbar box 1, and a fault indicator light 5 and an operation indicator light 6 are arranged on the upper surface of the box cover 2;

[0023] The electrical component assembly 7 includes a main board 71, a junction box 72 is arranged at one end of the upper surface of the main board 71, two groups of incoming circuit breakers 73 are symmetrically arranged on the upper surface of the main board 71, two groups of outgoing circuit breakers 76 are arranged on the upper surface of the main board 71, and the two groups of outgoing circuit breakers 76 are arranged between the two groups of incoming circuit breakers 73, and a monitoring unit 74, a monitoring power supply 75, a remote server 77 and an audible and visual alarm 78 are arranged on the upper surface of the main board 71.

[0024] Positioning bolts 79 are provided at the four corners of the upper surface of the main board 71. The main board 71 is in a square plate shape. The positioning bolts 79 facilitate the installation of the main board 71 inside the combiner box 1, making it easy to disassemble and assemble, convenient for disassembly and maintenance, and improving maintenance efficiency.

[0025] The monitoring power supply 75 is electrically connected to the remote server 77, the sound and light alarm 78 and the monitoring unit 74 respectively. A plurality of groups of wiring terminals 10 are arranged on one side of the junction box 1, and the plurality of groups of wiring terminals 10 are arranged in a rectangular array. The remote server 77 is provided with a command information receiving or sending unit for quickly receiving external information commands and issuing information commands for disconnecting the control line. It also has an alarm unit for issuing corresponding alarm information when the voltage, current, temperature and other parameters of the incoming circuit breaker 73 and the outgoing circuit breaker 76 are abnormal.

[0026] A plurality of support blocks 13 are arranged at the bottom of the inner cavity of the junction box 1, and the main board 71 is arranged on the plurality of support blocks 13. The plurality of positioning bolts 79 all penetrate the main board 71 and are bolted to the support blocks 13. The main board 71 is separated from the junction box 1 by the plurality of support blocks 13, thereby improving the heat dissipation efficiency.

[0027] A radiator 8 is provided on one side of the inner cavity of the combiner box 1. The radiator 8 is a heat dissipation fan. A plurality of heat dissipation fins 9 are provided on the other side of the inner cavity of the combiner box 1. The radiator 8 accelerates the air circulation rate in the inner cavity of the combiner box 1. At the same time, the heat is absorbed by the heat dissipation fins 9, and then the heat energy is discharged from the combiner box 1 under the action of the airflow.

[0028] A plurality of heat dissipation holes 14 are provided on one side of the combiner box 1 adjacent to the plurality of wiring terminals 10, and a limit assembly 11 is provided on the side of the combiner box 1 opposite to the plurality of heat dissipation holes 14, two groups of ear plates 12 are provided on one side of the box cover 2, two groups of flip buckles 3 are provided on one side of the box cover 2, and an observation window 4 is provided on the upper surface of the box cover 2. The heat dissipation holes 14 accelerate the efficiency of heat dissipation from the combiner box 1, and the observation window 4 facilitates the observation of the operation of the electrical component assembly 7 inside the combiner box 1, thereby reducing the number of times the box door is opened for inspection.

[0029] The limiting assembly 11 includes two groups of fixed seats 111 and two groups of positioning blocks 115. A rotating sleeve 112 is rotatably connected between the two groups of fixed seats 111, and both ends of the rotating sleeve 112 are threadedly connected to the limiting rod 113. Guide blocks 114 are provided on the outer sides of the two groups of limiting rods 113. The opposite side of the two groups of positioning blocks 115 is in conflict with the opposite end of the two groups of limiting rods 113. The rotating sleeve 112 is threadedly connected to the two groups of limiting rods 113 by rotating, and the two groups of limiting rods 113 slide in the fixed seat 111 through the guide block 114, and then conflict with the positioning block 115 engaged with the flip buckle 3, thereby limiting the flip buckle 3 and improving the opening and closing efficiency of the box cover 2.

[0030] When in use, instructions are received and issued through the monitoring unit 74 and the remote server 77, so that the staff can remotely control the line disconnection and turn on the sound and light alarm 78 to remind the staff. At the same time, the junction box 1 is connected to the power supply separately to prevent the inverter failure from causing the junction box 1 failure, thereby further improving the safety. When the emergency repair personnel arrive at the scene, they do not need to take the risk of cutting off the junction line. If danger is found during daily inspections, they can directly open the box cover 2 for operation and cut off the corresponding junction line according to the corresponding number, thereby further improving the safety of the staff's maintenance.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A photovoltaic power generation busbar line emergency cut-off safety protection device, comprising a busbar box (1), Features: The inner cavity of the combiner box (1) is provided with an electric component assembly (7), one end of the upper surface of the combiner box (1) is hingedly connected with a box cover (2), and the upper surface of the box cover (2) is provided with a fault indicator light (5) and an operation indicator light (6); The electrical component assembly (7) comprises a main board (71), a junction box (72) is arranged at one end of the upper surface of the main board (71), two groups of incoming circuit breakers (73) are symmetrically arranged on the upper surface of the main board (71), two groups of outgoing circuit breakers (76) are arranged on the upper surface of the main board (71), and the two groups of outgoing circuit breakers (76) are arranged between the two groups of incoming circuit breakers (73), and a monitoring unit (74), a monitoring power supply (75), a remote server (77) and an audible and visual alarm (78) are arranged on the upper surface of the main board (71).

2. A photovoltaic power generation bus line emergency cut-off safety protection device according to claim 1, Features: Positioning bolts (79) are arranged at the four end corners of the upper surface of the main board (71), and the main board (71) is arranged in a square plate shape.

3. A photovoltaic power generation bus line emergency cut-off safety protection device according to claim 1, Features: The monitoring power supply (75) is electrically connected to the remote server (77), the sound and light alarm (78) and the monitoring unit (74) respectively. A plurality of groups of connection terminals (10) are arranged on one side of the combiner box (1), and the plurality of groups of connection terminals (10) are arranged in a rectangular array.

4. A photovoltaic power generation bus line emergency cut-off safety protection device according to claim 2, Features: A plurality of groups of support blocks (13) are arranged at the bottom of the inner cavity of the combiner box (1), the main board (71) is arranged on the plurality of groups of support blocks (13), and the plurality of groups of positioning bolts (79) all penetrate the main board (71) and are bolted to the support blocks (13).

5. A photovoltaic power generation bus line emergency cut-off safety protection device according to claim 1, Features: A radiator (8) is provided on one side of the inner cavity of the combiner box (1), the radiator (8) being a heat dissipation fan, and a plurality of groups of heat dissipation fins (9) are provided on the other side of the inner cavity of the combiner box (1).

6. A photovoltaic power generation bus line emergency cut-off safety protection device according to claim 1, Features: The combiner box (1) has a plurality of heat dissipation holes (14) on one side adjacent to the plurality of connection terminals (10), and a limit assembly (11) is provided on the side opposite to the plurality of heat dissipation holes (14). Two groups of ear plates (12) are provided on one side of the box cover (2), two groups of flip buckles (3) are provided on one side of the box cover (2), and an observation window (4) is provided on the upper surface of the box cover (2).

7. A photovoltaic power generation bus line emergency cut-off safety protection device according to claim 6, Features: The limiting assembly (11) comprises two groups of fixed seats (111) and two groups of positioning blocks (115); a rotating sleeve (112) is rotatably connected between the two groups of fixed seats (111); both ends of the rotating sleeve (112) are threadedly connected to the limiting rod (113); guide blocks (114) are arranged on the outer sides of the two groups of limiting rods (113); and opposite sides of the two groups of positioning blocks (115) are in conflict with opposite ends of the two groups of limiting rods (113).

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