A photovoltaic combiner box with lightning monitoring function

Abstract

The present invention discloses a photovoltaic combiner box with a lightning monitoring function, which belongs to the technical field of photovoltaic combiner boxes; it comprises a box body, a lightning arrester is installed on the top of the box body, a lightning current sensor is arranged on the box body, a combiner monitoring unit, a lightning arrester and a lightning monitor are arranged in the box body, and the box body is provided with a power-off mechanism for disconnecting the lightning monitor from an external photovoltaic cell; the lightning current sensor is connected with the lightning monitor and the power-off mechanism through signals; the power-off mechanism is provided with a double-layer conductive spring sheet, an insulating pad is arranged on the inner side thereof to reduce the electrical contact between the conductive spring sheet and the docking plate; at the same time, by arranging an insulating retaining ring and an insulating film ring, the situation of arc flash between two disconnected conductive spring sheets can be effectively avoided; the present invention can automatically control the power-off mechanism through prediction to release the relevant electrical connection, thereby improving the protection effect of internal electrical equipment after power failure in thunderstorm weather.

Description

Technical Field

[0001] The invention belongs to the technical field of photovoltaic combiner boxes and relates to a photovoltaic combiner box with a lightning monitoring function. Background Art

[0002] The PV combiner box is an important component of the solar photovoltaic power generation system. It is mainly used to connect photovoltaic modules, collect DC power and distribute AC power, while protecting and controlling the system. The PV combiner box combines solar cell arrays, inverters and other auxiliary equipment for easy installation and maintenance, and is responsible for collecting and optimizing the power collected from multiple solar photovoltaic modules.

[0003] Since the photovoltaic combiner box is usually installed in an open-air venue, such as a roof or the ground, it must have lightning protection and rain protection functions to protect the internal components from damage; the existing photovoltaic combiner box detection system is equipped with a Y-shaped lightning protection module at the output end to protect the downstream inverter from damage caused by induced lightning strikes; however, this type of photovoltaic combiner box detection system is unable to make advance estimates and judgments on lightning weather information, resulting in the existing photovoltaic combiner box only having a simple lightning protection function, and being unable to prevent and respond to lightning in advance, so that to a certain extent, the photovoltaic panels connected to the combiner box will still be affected and damaged by the lightning current; therefore, a photovoltaic combiner box with lightning monitoring function is proposed to solve the above problems. Summary of the invention

[0004] The present invention overcomes the shortcomings of the prior art and proposes a photovoltaic combiner box with a lightning monitoring function; the present invention is achieved through the following technical solutions:

[0005] A photovoltaic combiner box with a lightning monitoring function comprises a box body, a lightning arrester is installed on the top of the box body, a lightning current sensor is arranged on the box body, a combiner monitoring unit, a lightning arrester, and a lightning monitor are arranged in the box body, the lightning monitor is electrically connected to the signal output end of the lightning arrester, the lightning monitor is electrically connected to the lightning arrester, and the lightning arrester is electrically connected to the combiner monitoring unit; the box body is provided with a power-off mechanism for powering off the lightning monitor and an external photovoltaic cell; the lightning current sensor is electrically connected to the lightning monitor and the power-off mechanism;

[0006] The power-off mechanism comprises two docking plates arranged inside the box body; the docking plates are connected to a driving assembly, and the two docking plates are fitted or separated by the driving assembly; the adjacent sides of the two docking plates are provided with docking grooves, and conductive springs are installed inside the docking grooves, and power connection assemblies are provided in the docking grooves, and the power connection assemblies comprise a plurality of cylindrical boxes fixedly connected to the outer side surfaces of the conductive springs, a plurality of fixing grooves arranged at the inner ends of the docking grooves, a wiring seat arranged inside the fixing grooves, and a conductive rod fixed inside the cylindrical box, the inner end of the wiring seat movably penetrates into the interior of the cylindrical box, the inner end surface of the wiring seat is provided with a conductive groove for matching the insertion of the conductive rod, and the outer end of the conductive groove is screwed and connected There is an insulating retaining ring; a pull-back spring is connected between the insulating retaining ring and the inner end of the terminal block, and an insulating film ring is also provided in the inner circle of the insulating retaining ring, and the inner aperture of the insulating film ring is smaller than the diameter of the conductive rod; the conductive spring sheet is composed of an inner insulating pad and an outer conductive sheet, and the outer end of the conductive rod passes through the insulating pad and is fixedly connected to the conductive sheet; the opposite sides of the two docking plates are connected to docking seats; an adapter is provided in the box, a transmission cable is electrically connected between the lightning monitor and one of the docking seats, a relay cable is electrically connected between the adapter and the other docking seat, the transmission cable corresponds to the relay cable one-to-one, and the conductive rod corresponds to the transmission cable one-to-one.

[0007] Furthermore, an installation frame is provided in the box body; the driving assembly includes a bidirectional screw which is arranged in the installation frame and rotates laterally, a movable seat installed on both sides of the middle part of the bidirectional screw and a micro motor arranged on one side of the installation frame, the driving shaft of the micro motor is coaxially fixed to one end of the bidirectional screw, and the outer end surface of the movable seat is fixed to the docking plate.

[0008] Furthermore, a plurality of sealed wire threading tubes are equidistantly connected and arranged at the bottom of the box body; a busbar cable passing through one of the sealed wire threading tubes is arranged at the bottom of the adapter seat.

[0009] Furthermore, the sealed wire threading tube is composed of a wire bundle tube, an abutment ring installed on the lower tube body of the wire bundle tube, a clamping nut screwed on the upper tube body of the wire bundle tube and a locking nut screwed on the bottom of the wire bundle tube; the top of the abutment ring abuts against the bottom of the box body, and the bottom of the clamping nut abuts against the inner bottom surface of the box body; the top of the inner wall of the wire bundle tube is provided with an internal threaded opening with a rotation direction opposite to that of the external thread, and the inside of the internal thread is screwed and connected with an anti-scratch ring covering the upper part of the wire bundle tube, and the bottom of the anti-scratch ring abuts against the top of the clamping nut.

[0010] Furthermore, installation openings are vertically opened on both sides of the top of the box body, a mounting seat is provided on the top of the box body outside the installation opening, and the lightning arrester is installed on the mounting seat; positioning mechanisms for preventing the lightning arrester from being stolen are provided on both sides of the inner top surface of the box body.

[0011] Furthermore, the positioning mechanism includes a positioning plate attached to the top surface of the box body, a positioning hole opened on the circumferential side of the positioning plate, an embedding groove opened on the circumferential side of the top surface of the mounting seat, a through hole opened in the middle of the embedding groove and a positioning piece arranged in the embedding groove; a positioning bolt matched with the positioning piece is provided inside the positioning hole; the positioning piece is composed of an anti-rotation seat clamped inside the embedding groove and a positioning screw fixed to the bottom of the anti-rotation seat, and the positioning screw extends from the through hole into the inside of the positioning hole, a plurality of anti-rotation blocks are protruded on the outer ring of the bottom of the anti-rotation seat, and a clamping groove matched with the anti-rotation blocks is provided on the circumferential side of the inner bottom surface of the embedding groove; the screw of the positioning bolt is screwed and connected inside the positioning screw.

[0012] Furthermore, the power-off mechanism is arranged at the bottom of one of the positioning plates.

[0013] Furthermore, a heat dissipation cavity is opened in the box, multiple ventilation holes are opened at the lower part of the outer walls on both sides of the box, and multiple heat dissipation holes are opened at the upper part of the inner walls on both sides of the box; drainage holes connected to the heat dissipation cavity are opened longitudinally on both sides of the bottom of the box.

[0014] Furthermore, fixing strips are welded on the rear ends of both sides of the box body, and fixing holes are opened on the fixing strips; a box door is hinged at the opening of the front end surface of the box body, a sealing seat is installed in the middle of the top surface of the box body, and a humidity monitor is provided on the top of the sealing seat.

[0015] Furthermore, a mounting frame is provided on the rear inner wall of the box body, the convergence monitoring unit is installed below the mounting frame, the lightning arrester is installed in the middle of the mounting frame, and the lightning monitor is arranged on the inner top surface of the box body.

[0016] The beneficial effects of the present invention compared with the prior art are as follows:

[0017] 1. The present invention can monitor the lightning weather in the photovoltaic panel installation area in real time and capture and monitor the information changes of the magnetic field data through the cooperation of the lightning current sensor, the lightning monitor and the power-off mechanism; the duration of the lightning weather and whether thunderstorm weather will occur in this area are analyzed and determined based on the information of the collected data, so that the power-off mechanism can be automatically controlled to release the electrical connection between the photovoltaic panel power supply and the photovoltaic junction box, avoiding damage to a large number of photovoltaic panel batteries and electrical components inside the photovoltaic junction box caused by lightning weather.

[0018] 2. The present invention adopts a double-layer conductive spring sheet, and an insulating pad is arranged on the inner side thereof to reduce the electrical contact between the conductive spring sheet and the docking plate; at the same time, by arranging the insulating retaining ring and the insulating film ring, the electrical contact area between the conductive rod and the terminal block is reduced, which can effectively avoid the arc flash between the two disconnected conductive spring sheets, thereby improving the protection effect of internal electrical equipment after power failure in thunderstorm weather.

[0019] 3. The present invention cooperates with the positioning piece and the positioning bolt so that the positioning mechanism can only be removed from the box from the inside, and then the lightning arrester can be removed from the top of the box; this structure can improve the anti-theft and disassembly effect of the lightning arrester from the outside after installation, thereby improving the overall safety protection performance of the structure.

[0020] 4. The present invention can improve not only the waterproof effect but also the heat dissipation effect inside the box body by cooperating with the positioning mechanism and the hollow space of the box body when encountering thunderstorm weather. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall first-view structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the overall second viewing angle structure of the present invention;

[0023] Figure 3 This is a schematic diagram of the first perspective structure of the interior of the box of the present invention;

[0024] Figure 4 This is a schematic diagram of the structure of the interior of the box from a second viewing angle of the present invention;

[0025] Figure 5 It is a schematic diagram of the structure of the interior of the box body of the present invention from a third viewing angle;

[0026] Figure 6 This is a schematic diagram of the installation position of the lightning arrester of the present invention;

[0027] Figure 7 This is a schematic diagram of the installation position of the lightning monitor of the present invention;

[0028] Figure 8 A schematic diagram of the positional relationship between the lightning arrester and the lightning monitor of the present invention;

[0029] Fig. 9 It is a schematic diagram of the structure of the lightning monitor and lightning arrester from the first perspective of the present invention;

[0030] Fig.10 It is a schematic structural diagram of the lightning monitor and lightning arrester of the present invention from a second viewing angle;

[0031] Fig.11 It is a schematic diagram of the installation state of the power-off mechanism of the present invention;

[0032] Fig.12 The conductive spring and the docking plate structure of the present invention are schematically shown in FIG. Figure 1 ;

[0033] Fig.13 It is a schematic diagram of the three-dimensional structure of the power-off mechanism of the present invention;

[0034] Fig.14It is a schematic diagram of the connection state of the positioning bolt and the positioning member of the present invention from the first perspective;

[0035] Fig.15 It is a schematic diagram of the connection state of the positioning bolt and the positioning member of the present invention from a second viewing angle;

[0036] Fig.16 It is a schematic diagram of the structure of the sealed threading tube and the anti-scratch ring of the present invention;

[0037] Fig.17 The conductive spring and the docking plate structure of the present invention are schematically shown in FIG. Figure 2 ;

[0038] Fig.18 It is a cross-sectional view of the power connection assembly structure of the present invention.

[0039] Serial number in the picture:

[0040] 1. Box body; 2. Sealing seat; 3. Humidity monitor; 4. Mounting seat; 5. Lightning arrester; 6. Box door; 7. Lightning current sensor; 8. Sealed threading tube; 9. Drain outlet; 10. Anti-scratch ring; 11. Convergence monitoring unit; 12. Lightning arrester; 13. Lightning monitor; 14. Positioning plate; 15. Mounting frame; 16. Transmission cable; 17. Adapter seat; 18. Relay cable; 19. Bidirectional lead screw; 20. Moving seat; 21. Docking plate; 22. Docking seat; 23. Micro motor; 24. Conductive spring; 25. Positioning bolt; 26. Positioning piece; 27. Convergence cable; 28. Cylindrical box; 29. ​​Terminal block; 30. Conductive rod; 31. Insulating retaining ring; 32. Retracting spring; 33. Insulating film ring; 34. Anti-rotation seat; 35. Positioning screw; 36. Stop block; 37. Insulating pad; 38. Conductive sheet. DETAILED DESCRIPTION

[0041] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention is further described in detail in conjunction with the embodiments and the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. The technical solutions of the present invention are described in detail below in conjunction with the embodiments and the accompanying drawings, but the scope of protection is not limited thereto.

[0042] See also Figures 1 to 18, the present embodiment proposes a photovoltaic junction box with a lightning monitoring function, including a box body 1, fixed strips are welded on the rear ends of both sides of the box body 1, and fixing holes are opened on the fixed strips; a box door 6 is hinged at the opening of the front end face of the box body 1, a sealing seat 2 is installed in the middle of the top surface of the box body 1, and a humidity monitor 3 is arranged on the top of the sealing seat 2, and installation openings are vertically opened on both sides of the top of the box body 1, and a mounting seat 4 is provided on the top of the box body 1 outside the mounting opening, and a lightning arrester 5 is installed on the mounting seat 4, a lightning current sensor 7 is installed on the upper part of one side of the box body 1, and a plurality of sealed threading tubes 8 are equidistantly connected and connected at the bottom of the box body 1; positioning mechanisms for preventing the lightning arrester 5 from being stolen are arranged on both sides of the inner top surface of the box body 1; a mounting frame is provided on the inner wall of the rear end of the box body 1, a convergence monitoring unit 11 is provided at the lower part of the mounting frame, a lightning arrester 12 with a lightning current recording function is installed in the middle of the mounting frame, and the inner top surface of the box body 1 is provided with a A lightning monitor 13 is electrically connected to the signal output end of the lightning arrester 5, the lightning monitor 13 is electrically connected to the lightning arrester 12, and the lightning arrester 12 is electrically connected to the junction monitoring unit 11; a power-off mechanism for disconnecting the lightning monitor 13 and the external photovoltaic cell is provided on the upper part of one side of the box body 1; through the cooperation of the lightning current sensor 7, the lightning monitor 13 and the power-off mechanism, the lightning weather in the photovoltaic panel installation area is monitored in real time, and the information on the change of magnetic field data is captured and monitored; thereby, the duration of the lightning weather and whether there will be thunderstorm weather in this area in the future are analyzed and determined based on the collected data information, and the power-off mechanism can be automatically controlled to release the electrical connection between the photovoltaic panel power supply and the photovoltaic junction box before the thunderstorm comes, so as to avoid the damage of the photovoltaic panel battery and the electrical components in the box due to the thunderstorm.

[0043] Specifically, Fig.12 , Figures 14 to 16 As shown, the positioning mechanism includes a positioning plate 14 attached to the top surface of the box body 1, three positioning holes arranged on the periphery of the positioning plate 14, three embedding grooves arranged on the periphery of the top surface of the mounting seat 4, a through hole arranged in the middle of the embedding groove and a positioning member 26 arranged in the embedding groove; a positioning bolt 25 is arranged inside the positioning hole to cooperate with the positioning member 26; the positioning mechanism can not only improve the anti-theft and disassembly effect of the lightning arrester 5, but also improve the safety protection effect of the entire structure; the positioning member 26 is composed of an anti-rotation seat 34 clamped inside the embedding groove and a fixed member 26 fixed to the bottom of the anti-rotation seat 34. The anti-rotation seat 34 is composed of a positioning screw tube 35, and the positioning screw tube 35 extends from the through hole into the interior of the positioning hole, the bottom outer ring protrudes with a plurality of anti-rotation blocks 36, and the inner bottom surface of the embedded groove is provided with a clamping groove that cooperates with the anti-rotation block 36; the screw of the positioning bolt 25 is screwed and connected to the inside of the positioning screw tube 35; the positioning member 26 cooperates with the positioning bolt 25, so that the positioning mechanism can only be removed from the box body 1 from the inside of the box body 1, and then the lightning arrester 5 can be removed from the top of the box body 1; this structure can improve the anti-theft and disassembly effect of the lightning arrester 5 from the outside after installation.

[0044] like Figures 9 to 13 , Figure 17 to Figure 18As shown, the power-off mechanism includes an installation frame 15 arranged at the bottom of one of the positioning plates 14, two docking plates 21 slidably arranged below the installation frame 15, and a docking seat 22 installed on the outer side of the docking plate 21; a driving component is arranged inside the installation frame 15, and the two docking plates 21 can be driven to move toward each other by the driving component; an adapter seat 17 is arranged on the upper part of the inner wall of one side of the box body 1, and a transmission cable 16 is electrically connected between the lightning monitor 13 and one of the docking seats 22, and a relay cable 18 is electrically connected between the adapter seat 17 and the other docking seat 22, and the transmission cable 16 corresponds to the relay cable 18 one by one; the lightning current sensor 7 is electrically connected to the lightning arrester 12 by back threading ; The bottom of the adapter 17 is provided with a bus cable 27 that passes through one of the sealed threading tubes 8; the adjacent sides of the two docking plates 21 are provided with docking grooves, and conductive springs 24 are installed inside the docking grooves. There are power connection components in the docking grooves, and the power connection components include a plurality of cylindrical boxes 28 fixed to the outer side of the conductive springs 24, a plurality of fixed grooves opened at the inner end of the docking grooves, a wiring seat 29 arranged inside the fixed grooves, and a conductive rod 30 fixed inside the cylindrical box 28. The conductive rod 30 corresponds to the transmission cable 16 one by one; the inner end of the wiring seat 29 is movably inserted into the cylindrical box 28, and the inner end surface of the wiring seat 29 is provided with a conductive groove that cooperates with the conductive rod 30 to insert the conductive, and the outer end of the conductive groove is rotated The insulating retaining ring 31 is connected to the conductive rod 30; a pull-back spring 32 is connected between the insulating retaining ring 31 and the inner end of the terminal block 29; an insulating film ring 33 is also provided in the inner circle of the insulating retaining ring 31; the insulating film ring 33 can improve the arc prevention effect of the conductive rod 30 after it exits the conductive groove; the aperture of the middle part of the insulating film ring 33 is smaller than the diameter of the conductive rod 30; the conductive spring 24 is composed of an inner insulating pad 37 and an outer conductive sheet 38; the outer end of the conductive rod 30 passes through the insulating pad 37 and is fixedly connected to the conductive sheet 38; when the two conductive springs 24 approach each other, the conductive springs 24 face their respective docking grooves and are pressed into the docking grooves, which will push the cylindrical box 28 The conductive rod 30 moves toward the fixed groove, so that the conductive rod 30 is supported inward and passes through the insulating film ring 33, and then inserted into the conductive groove of the terminal block 29 to complete the electrical connection; when the two conductive springs 24 are separated, the cylindrical box 28 can be pushed back by the pull-back spring 33, and the conductive rod 30 is withdrawn from the conductive groove and the insulating film ring 33 during the return of the cylindrical box 28. At the same time, the conductive spring 24 is also withdrawn from the docking groove under the action of the returning cylindrical box 28, so that the conductive rod 30 is disconnected from the conductive groove, and the conductive spring 24 is also disconnected from the power supply; the structure of the insulating pad 37 is provided on the inner side to reduce the electrical contact between the conductive spring 24 and the docking plate 21;At the same time, by setting the insulating retaining ring 31 and the insulating film ring 33, the electrical contact area between the conductive rod 30 and the terminal block 29 can be reduced, which can effectively avoid the arc flash between the two disconnected conductive springs 24, and improve the protection effect of the internal electrical equipment after the power is cut off in thunderstorm weather. ;

[0045] In the present invention, the driving assembly includes a bidirectional lead screw 19 that is laterally rotatable and arranged in the installation frame 15, a movable seat 20 installed on both sides of the middle part of the bidirectional lead screw 19, and a micro motor 23 arranged on one side of the installation frame 15. The driving shaft of the micro motor 23 is coaxially fixed to one end of the bidirectional lead screw 19, and the outer end surface of the movable seat 20 is fixed to the docking plate 21; when the bidirectional lead screw 19 is reversed, the two movable seats 20 can be moved outward in opposite directions, and then the docking plate 21 is driven to separate by the two moving away movable seats 20, so that the electrical connection between the transmission cable 16 and the relay cable 18 is disconnected, and then the purpose of disconnecting the electrical control monitoring between all photovoltaic cells and the junction box can be achieved; when the bidirectional lead screw 19 rotates forward, the movable seat 20 can also drive the docking plate 21 to abut; under the action of the conductive spring 24, the transmission cable 16 and the relay cable 18 are electrically connected, so that the photovoltaic panel and the junction box continue to be energized.

[0046] As a preferred structure, in the present embodiment, a heat dissipation cavity is provided in the box body 1, a plurality of ventilation holes are provided at the lower parts of the outer walls on both sides of the box body 1, and a plurality of heat exhaust holes are provided at the upper parts of the inner walls on both sides of the box body 1; drainage holes 9 connected to the heat dissipation cavity are longitudinally provided on both sides of the bottom of the box body 1; it is not only convenient to improve the waterproof effect in thunderstorm weather, but also can improve the heat dissipation effect inside the box body 1; the sealed threading tube 8 is composed of a wire harness tube, an abutment ring installed on the lower tube body of the wire harness tube, a clamping nut screwed on the upper tube body of the wire harness tube and a locking nut screwed on the bottom of the wire harness tube, the top of the abutment ring abuts against the bottom of the box body 1, and the bottom of the clamping nut abuts against the inner bottom surface of the box body 1; an inner threaded opening with an opposite rotation direction to the external thread is provided at the top of the inner wall of the wire harness tube, and an anti-scratch ring 10 covered on the upper part of the wire harness tube is screwed in the inner threaded opening, and the bottom of the anti-scratch ring 10 abuts against the top of the clamping nut, which can effectively prevent the clamping nut from loosening during use.

[0047] In this embodiment, the working principle of a photovoltaic combiner box with lightning monitoring function is as follows:

[0048] Each electronic component is installed on the box 1 respectively, and then the photovoltaic cell is electrically connected to the bus cable 27 through a wire. After connection, the bus monitoring unit 11 can monitor the operating status of the battery panel in the photovoltaic battery array and the current flow of the photovoltaic cell. By turning on the humidity monitor 3, the air humidity in the photovoltaic solar panel installation area can be monitored in real time; and the ground wire at the bottom of the lightning arrester 5 is connected to the ground for conductive lightning protection.

[0049] When monitoring lightning in the photovoltaic solar panel installation area, the lightning current sensor 7 is used to monitor and measure the current intensity in the lightning activity, and the high-precision induction coil inside the lightning current sensor 7 is used to capture these magnetic field changes, and then convert them into measurable electrical signals, and the captured electrical signals of the magnetic field changes are transmitted to the lightning monitor 13 and the lightning arrester 12. Through the threshold information set in the lightning monitor 13, according to the magnetic field change information captured by the received lightning current sensor 7, the voltage signal is converted from an analog signal to a digital signal and then transmitted to the post-processor for processing, so as to obtain the amplitude of the induced lightning current and the time of the lightning strike, and at the same time send the information to the data storage device of the lightning monitor 13.

[0050] The lightning monitor 13 can analyze the received data through the internal data processing module, judge how long it will take for thunderstorm weather to occur in this area in the future, and analyze and calculate the intensity of lightning activity in this thunderstorm weather, and then perform interference elimination processing on the judged data and send it to the remote PC for the user to view. When the user determines that the photovoltaic panel and the device need to be powered off, an instruction to start the power-off mechanism to disconnect the connection is sent to the lightning monitor 13;

[0051] After the power-off mechanism receives the command, it will start the micro motor 23 to drive the bidirectional screw 19 to reverse. When the bidirectional screw 19 reverses, the two movable seats 20 can move outward in opposite directions, and then the two movable seats 20 that move away drive the docking plate 21 to separate, thereby disconnecting the electrical connection between the transmission cable 16 and the relay cable 18, and then the purpose of disconnecting the electrical control monitoring between all photovoltaic cells and the junction box can be achieved, so as to avoid the situation in which a large number of photovoltaic panel batteries and electrical components inside the photovoltaic junction box are damaged due to lightning strikes on a certain photovoltaic panel in thunderstorm weather.

[0052] The above content is a further detailed description of the present invention in combination with a specific preferred embodiment. It cannot be determined that the specific embodiments of the present invention are limited to this. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the present invention, which should be regarded as belonging to the present invention and the scope of patent protection determined by the submitted claims.

Claims

1. A photovoltaic combiner box with a lightning monitoring function, comprising a box body (1), a lightning arrester (5) installed on the top of the box body (1), characterized in that: A lightning current sensor (7) is arranged on the box (1); a convergence monitoring unit (11), a lightning arrester (12), and a lightning monitor (13) are arranged in the box (1); the lightning monitor (13) is electrically connected to a signal output end of the lightning arrester (5); the lightning monitor (13) is electrically connected to the lightning arrester (12); and the lightning arrester (12) is electrically connected to the convergence monitoring unit (11); the box (1) is provided with a power-off mechanism for disconnecting the lightning monitor (13) from an external photovoltaic cell; the lightning current sensor (7) is electrically connected to the lightning monitor (13) and the power-off mechanism; The power-off mechanism comprises two docking plates (21) arranged inside the box body (1); the docking plates (21) are connected to a driving assembly, and the two docking plates (21) are fitted or separated by the driving assembly; the adjacent sides of the two docking plates (21) are provided with docking grooves, and conductive springs (24) are installed inside the docking grooves, and power connection assemblies are provided in the docking grooves, and the power connection assemblies comprise a plurality of cylindrical boxes (28) fixedly connected to the outer side surfaces of the conductive springs (24), a plurality of fixing grooves arranged at the inner ends of the docking grooves, a wiring seat (29) arranged inside the fixing grooves, and a conductive rod (30) fixed inside the cylindrical box (28); the inner end of the wiring seat (29) movably penetrates into the inside of the cylindrical box (28), the inner end surface of the wiring seat (29) is provided with a conductive groove for matching the conductive rod (30) to be inserted, and the outer end of the conductive groove is screwed and connected with an insulating retaining ring (31); the insulating retaining ring (31) is connected to the wiring seat (28) 9) A pull-back spring (32) is connected between the inner ends, an insulating film ring (33) is also provided in the inner ring of the insulating retaining ring (31), and the inner aperture of the insulating film ring (33) is smaller than the diameter of the conductive rod (30); the conductive spring (24) is composed of an inner insulating pad (37) and an outer conductive sheet (38), and the outer end of the conductive rod (30) passes through the insulating pad (37) and is fixedly connected to the conductive sheet (38); the opposite sides of the two docking plates (21) are connected to docking seats (22); an adapter seat (17) is provided in the box body (1), a transmission cable (16) is electrically connected between the lightning monitor (13) and one of the docking seats (22), a relay cable (18) is electrically connected between the adapter seat (17) and the other docking seat (22), the transmission cable (16) corresponds to the relay cable (18) one by one, and the conductive rod (30) corresponds to the transmission cable (16) one by one; A mounting frame (15) is provided in the housing (1); the driving assembly comprises a bidirectional lead screw (19) which is arranged in the mounting frame (15) for transverse rotation, a moving seat (20) which is installed on both sides of the middle of the bidirectional lead screw (19), and a micro motor (23) which is arranged on one side of the mounting frame (15); the driving shaft of the micro motor (23) is coaxially fixedly connected to one end of the bidirectional lead screw (19), and the outer end surface of the moving seat (20) is fixedly connected to the docking plate (21); The bottom of the box body (1) is provided with a plurality of sealed wire threading tubes (8) at equal intervals; the bottom of the adapter seat (17) is provided with a busbar cable (27) extending from the inside of one of the sealed wire threading tubes (8); Both sides of the top of the box body (1) are provided with installation openings in a vertical direction, and a mounting seat (4) is provided on the top of the box body (1) outside the installation opening, and the lightning arrester (5) is installed on the mounting seat (4); and both sides of the inner top surface of the box body (1) are provided with positioning mechanisms for preventing the lightning arrester (5) from being stolen; The positioning mechanism comprises a positioning plate (14) attached to the inner top surface of the box body (1), a positioning hole provided on the circumferential side of the positioning plate (14), an embedding groove provided on the circumferential side of the top surface of the mounting seat (4), a through hole provided in the middle of the embedding groove and a positioning member (26) provided in the embedding groove; a positioning bolt (25) matched with the positioning member (26) is provided inside the positioning hole; the positioning member (26) is composed of an anti-rotation seat (34) clamped inside the embedding groove and a positioning screw tube (35) fixed to the bottom of the anti-rotation seat (34), and the positioning screw tube (35) extends from the through hole into the inside of the positioning hole, a plurality of anti-rotation blocks (36) are protruded on the outer ring of the bottom of the anti-rotation seat (34), and a clamping groove matched with the anti-rotation blocks (36) is provided on the circumferential side of the inner bottom surface of the embedding groove; the screw of the positioning bolt (25) is screwed and connected inside the positioning screw tube (35).

2. A photovoltaic combiner box with lightning monitoring function according to claim 1, characterized in that: The sealed wire threading tube (8) is composed of a wire harness tube, an abutment ring installed on the lower tube body of the wire harness tube, a clamping nut screwed on the upper tube body of the wire harness tube, and a locking nut screwed on the bottom of the wire harness tube; the top of the abutment ring abuts against the bottom of the box body (1), and the bottom of the clamping nut abuts against the inner bottom surface of the box body (1); the top of the inner wall of the wire harness tube is provided with an internal threaded opening with a rotation direction opposite to that of the external thread, and an anti-scratch ring (10) arranged on the upper part of the wire harness tube is screwed and connected inside the internal threaded opening, and the bottom of the anti-scratch ring (10) abuts against the top of the clamping nut.

3. The photovoltaic combiner box with lightning monitoring function according to claim 1, characterized in that: The power-off mechanism is arranged at the bottom of one of the positioning plates (14).

4. The photovoltaic combiner box with lightning monitoring function according to claim 1, characterized in that: A heat dissipation cavity is provided in the box body (1), a plurality of ventilation openings are provided at the lower portions of the outer walls on both sides of the box body (1), and a plurality of heat dissipation openings are provided at the upper portions of the inner walls on both sides of the box body (1); and drainage openings (9) communicating with the heat dissipation cavity are provided longitudinally on both sides of the bottom of the box body (1).

5. The photovoltaic combiner box with lightning monitoring function according to claim 1, characterized in that: The rear ends of both sides of the box body (1) are welded with fixing strips, and fixing holes are opened on the fixing strips; a box door (6) is hingedly connected to the opening of the front end surface of the box body (1); a sealing seat (2) is installed in the middle of the top surface of the box body (1), and a humidity monitor (3) is provided on the top of the sealing seat (2).

6. The photovoltaic combiner box with lightning monitoring function according to claim 1, characterized in that: A mounting frame is provided on the inner wall at the rear end of the box body (1), the confluence monitoring unit (11) is installed below the mounting frame, the lightning arrester (12) is installed in the middle of the mounting frame, and the lightning monitor (13) is arranged on the inner top surface of the box body (1).

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