A photovoltaic busbar box applicable to a land maintenance site

Abstract

The present invention belongs to the technical field of busbar boxes, and particularly relates to a photovoltaic busbar box applicable to a land maintenance site, including a busbar box assembly for collecting the positive and negative outputs of four dry photovoltaic panels. The busbar box assembly includes a cabinet. In the present invention, the connection components provided in the positive connection port, negative connection port, positive collection outlet, negative collection outlet, positive plug interface, and negative plug interface on the cabinet of the busbar box assembly can effectively buffer the large pulling force on the wire when the equipment for repairing vegetation hooks the exposed wire, avoiding the wire from being disconnected when hooked by the equipment.

Description

Technical Field

[0001] The present invention belongs to the technical field of busbar boxes, and particularly relates to a photovoltaic busbar box applicable to land maintenance sites. Background Art

[0002] At present, the combination of photovoltaic panels and ground planting is an effective method for improving the desert situation. It can not only generate electricity using solar energy, but also block the sandy land through the photovoltaic panels to reduce the evaporation of ground moisture and keep plants with sufficient moisture for normal growth.

[0003] The process of planting plants in the sandy land under the photovoltaic panels involves soil replacement, watering and later plant maintenance in the sandy land. Maintenance generally uses manual and machine means. During the maintenance process, the wires connecting the busbar box to the photovoltaic panels are often accidentally pulled down, or the mechanized equipment used for maintenance accidentally hits the relatively fragile busbar box bracket. These mistakes may cause the wires to disconnect, and the disconnection of the wires will be accompanied by the generation of electric arcs, posing a fire risk.

[0004] The structure in the photovoltaic busbar box disclosed in the existing patent with the application number 202021955169.X includes a fuse, a circuit breaker, a lightning arrester, a disconnect switch, etc. These structures enable the busbar box not to affect the entire photovoltaic system when a certain photovoltaic module fails, but do not have the function of preventing the generation of electric arcs when the wires are manually pulled and disconnected.

[0005] When maintaining the plants under the photovoltaic panels, power equipment will be used, but there is no power take-off interface on the busbar box, and the power consumption of these power equipment cannot be taken from the busbar box, which is not convenient for the effective operation of the power equipment used for plant maintenance.

[0006] In addition, planting plants under the photovoltaic panels will inevitably lead to a relatively large amount of water vapor around the photovoltaic panels. The waterproof membrane in the waterproof and breathable valve at the bottom of the busbar box needs to be frequently replaced to ensure its waterproof function. If the waterproof membrane is not replaced in time, the electrical components in the busbar box will be damaged due to the increase in water vapor.

[0007] The present invention designs a photovoltaic busbar box applicable to land maintenance sites to solve the above problems. Summary of the Invention

[0008] Based on this, it is necessary to provide a photovoltaic busbar box applicable to land maintenance sites for the problems existing in the current photovoltaic busbar box. In the present invention, the leg assembly for connecting the bracket and the busbar box assembly can be disconnected between the first disc and the second disc when being violently impacted, so that the impact received by the busbar box assembly is effectively buffered, thereby ensuring that the cabinet body of the busbar box assembly does not deform or get damaged when being impacted, and further ensuring that the electrical components in the cabinet body of the busbar box assembly will not be squeezed and damaged due to the deformation of the cabinet body. In the present invention, the connection components provided in the positive electrode access port, negative electrode access port, positive electrode outlet port, negative electrode outlet port, positive electrode socket and negative electrode socket on the cabinet body of the busbar box assembly can effectively buffer the large pulling force received by the wire when the equipment for maintaining vegetation hooks the exposed wire, avoiding the wire from being disconnected when being hooked by the equipment. When the corresponding exposed wire is disconnected due to a large pulling force in the present invention, the first circuit breaker or the second circuit breaker or the third circuit breaker on the corresponding circuit in the cabinet body is disconnected first, effectively avoiding the generation of electric arcs when the wire is broken under tension, and ensuring that a fire will not occur due to the generation of electric arcs after the wire is disconnected. The connection components provided in the positive electrode socket and negative electrode socket on the side wall of the cabinet body of the busbar box assembly and respectively connected to the positive and negative electrodes flowing out from the disconnecting switch in the cabinet body one by one provide a power taking interface for the power equipment for maintaining the vegetation under the photovoltaic panel, ensuring that the power equipment for maintaining the vegetation can carry out effective vegetation maintenance work due to continuous power supply. The air permeable valve assembly provided at the bottom of the cabinet body of the busbar box assembly can effectively ventilate the inside and outside of the cabinet body of the busbar box assembly, and at the same time absorb and discharge the water vapor generated in the cabinet body through the water permeable and air permeable membrane, water absorption plug, water absorption strip and water absorption ball therein. The vibration generated by the outside air entering through the air permeable hole due to strong wind in the water permeable and air permeable membrane in the air permeable valve assembly will generate an external thrust at the air permeable hole, so that the air permeable hole will not be blocked, and further ensuring that the entire air permeable valve assembly continuously plays the function of waterproof and air permeable, reducing the maintenance and replacement cost of the waterproof and air permeable valve.

[0009] The above object is achieved by the following technical solutions:

[0010] A photovoltaic busbar box applicable to land maintenance sites, used for collecting the outputs of a plurality of photovoltaic panels, includes:

[0011] Busbar box assembly, used for collecting the positive and negative outputs of four photovoltaic panels. The busbar box assembly includes a cabinet body. Inside the cabinet body, there are eight fuses, eight first circuit breakers electrically connected to the fuses one by one, eight lightning arresters electrically connected to the first circuit breakers one by one, a disconnecting switch electrically connected to the eight lightning arresters, a third circuit breaker electrically connected to the disconnecting switch, and two second circuit breakers connected in parallel with the third circuit breaker. On both sides of the upper end of the cabinet body, there are a pair of positive connection ports and a pair of negative connection ports. On one side of the lower end of the cabinet body, there are a positive busbar outlet, a negative busbar outlet, a positive plug interface, and a negative plug interface. Inside the positive connection port and the negative connection port, there are connection components electrically connected to the corresponding fuses. Inside the positive busbar outlet and the negative busbar outlet, there are connection components electrically connected to the third circuit breaker. Inside the positive plug interface and the negative plug interface, there are two connection components electrically connected to the second circuit breakers one by one. The connection component has the characteristics of buffering the tension of the corresponding wire and, when the corresponding wire is pulled and disconnected, first disconnecting the first circuit breaker or the second circuit breaker or the third circuit breaker. At the first ventilation hole at the bottom of the cabinet body, there is a waterproof and breathable and anti-blocking ventilation valve assembly. On the front side of the cabinet body, there is a cabinet door. The cabinet body is arranged on the bracket for installing photovoltaic panels through a leg assembly that is easily broken when impacted.

[0012] In one embodiment, the connection component includes a first ring sleeve arranged at the positive connection port or the negative connection port or the positive busbar outlet or the negative busbar outlet or the positive plug interface or the negative plug interface. A wire tube is slidably arranged inside the first ring sleeve. Inside the wire tube, there is an electrical connection copper sleeve electrically connected to the copper cores of the wires at both ends. The exposed end of the wire tube is provided with a first circular ring that cooperates with the first ring sleeve. A first spring for driving the wire tube to insert into the first ring sleeve is connected between the first circular ring and the side wall of the cabinet body. A second ring sleeve is arranged on the first circular ring. The inner diameter of the second ring sleeve is larger than the inner diameter of the wire tube. At the end of the second ring sleeve, there are several first clamping strips evenly distributed in the circumferential direction. A first screw sleeve is threadedly connected to the second ring sleeve. Inside the first screw sleeve, there is a conical surface that cooperates with the first clamping strip. A third ring sleeve is threadedly connected to the inner end of the wire tube. Inside the third ring sleeve, there is a third circular ring that cooperates with the end of the wire tube. At the end of the third ring sleeve, several second clamping strips are evenly arranged in the circumferential direction. A second screw sleeve is threadedly connected to the end of the third ring sleeve. The inner wall of the second screw sleeve is provided with a conical surface that cooperates with the second clamping strip. A second circular ring is arranged on the outer side of the third ring sleeve. A rotating sleeve is rotatably arranged on the second circular ring. A second pulling rope connected to the switch lever of the first circuit breaker or the switch lever of the second circuit breaker or the switch lever of the third circuit breaker is arranged on the rotating sleeve. A second spring is connected between the second circular ring and the inner wall of the cabinet body.

[0013] In one embodiment, a third hanging ear is provided on the rotating sleeve, a third hanging ring is connected to the third hanging ear, the third hanging ring is connected to a fourth hanging ring through a second drawstring, the fourth hanging ring is connected to a fourth hanging ear on the clamping sleeve, and the clamping sleeve is fixedly sleeved on the switch lever of the first circuit breaker or the switch lever of the second circuit breaker or the switch lever of the third circuit breaker through a bolt.

[0014] In one embodiment, the breathable valve assembly includes a fourth ring sleeve provided at the first breathable hole at the bottom of the cabinet body. The lower end of the fourth ring sleeve is threadedly connected with a cover. A frustum matching the lower end of the fourth ring sleeve is provided around the bottom inside the cover. A water absorption plug for filling the fourth ring sleeve is provided at the bottom inside the cover. A plurality of second breathable holes communicating with the bottom inside the cover are evenly formed in the circumferential direction of the lower end side wall of the cover. A water absorption strip is provided in the third jack at the bottom of the cover. One end of the water absorption strip is buried in the water absorption plug, and the other end of the water absorption strip is exposed and provided with a water absorption ball. A third screw sleeve is threadedly connected in the first breathable hole, and a waterproof breathable membrane is provided in the third screw sleeve.

[0015] In one embodiment, a soft sleeve is provided on the outer side of the exposed part of the water absorption strip.

[0016] In one embodiment, the cabinet body is assisted to be suspended below the photovoltaic panel through two first drawstrings connected to the bracket at both sides of its upper end.

[0017] In one embodiment, the upper and lower ends of the first drawstring are respectively connected with a first hanging ring and a second hanging ring. The first hanging ring is connected to a first hanging ear on the bracket, and the second hanging ring is connected to a second hanging ear on the cabinet body.

[0018] In one embodiment, the bracket is fixed to a concrete cast-in-place pile in the sand through bolts. The concrete cast-in-place pile is formed by pouring steel bars and concrete in a cylindrical pit on the sand.

[0019] In one embodiment, the leg assembly is connected to the first leg connected thereto and the second leg connected to the bottom of the cabinet body by bolts. The upper end of the first leg is provided with a first disc, the upper edge of the first disc is provided with a first conical surface, and two first jacks that are circumferentially spaced 180 degrees and communicate with the first conical surface are opened on the lower end surface of the first disc. The lower end of the second leg is provided with a second disc, the lower edge of the second disc is provided with a second conical surface, and two second jacks that communicate with the second conical surface and correspond to the first jacks one by one are opened on the upper end surface of the second disc. Two tie rods passing through the first jacks and the second jacks are connected between the first disc and the second disc. A brittle nut that makes the first disc and the second disc clamp each other and is easily broken under an external force is threadedly connected to the tie rod. The upper end of the second leg is provided with a plug board, and the plug board is matched with a socket on the bottom of the cabinet body. A locking screw that cooperates with the plug board is arranged in a threaded hole on the socket.

[0020] In one embodiment, a positioning groove is opened in the middle of the upper end of the first disc, and a positioning pin that cooperates with the positioning groove is arranged at the lower end of the second disc.

[0021] The beneficial effects of the present invention are as follows:

[0022] 1. In the present invention, when the leg assembly for connecting the bracket and the busbar box assembly is violently impacted, it can be disconnected between the first disc and the second disc, so that the impact received by the busbar box assembly is effectively buffered, thereby ensuring that the cabinet body of the busbar box assembly is not deformed or damaged when impacted, and further ensuring that the electrical components in the cabinet body of the busbar box assembly are not squeezed and damaged due to the deformation of the cabinet body.

[0023] 2. In the present invention, the connection components arranged in the positive electrode access port, negative electrode access port, positive electrode outlet port, negative electrode outlet port, positive electrode socket and negative electrode socket on the cabinet body of the busbar box assembly can effectively buffer the large pulling force received by the electric wire when the equipment for repairing vegetation hooks the exposed electric wire, and avoid the electric wire from being disconnected when hooked by the equipment.

[0024] 3. When the corresponding exposed electric wire is disconnected due to a large pulling force in the present invention, the first circuit breaker or the second circuit breaker or the third circuit breaker on the corresponding circuit in the cabinet body is disconnected first, effectively avoiding the generation of electric arcs when the electric wire is broken by pulling, and ensuring that the electric wire will not catch fire due to the occurrence of electric arcs after being disconnected.

[0025] 4. In the present invention, the connection components arranged in the positive electrode socket and the negative electrode socket on the side wall of the cabinet body of the busbar box assembly and respectively connected to the positive and negative electrodes flowing out from the disconnector in the cabinet body one by one provide a power taking interface for the power equipment for repairing the vegetation under the photovoltaic panel, ensuring that the power equipment for maintaining the vegetation can carry out effective vegetation maintenance work due to continuous power supply.

[0026] 5. In the present invention, the air permeable valve assembly disposed at the bottom of the cabinet body of the busbar box assembly effectively permeates air inside and outside the cabinet body of the busbar box assembly, and at the same time absorbs and discharges the water vapor generated in the cabinet body through the water permeable and air permeable membrane, water absorption plug, water absorption strip and water absorption balls therein. The vibration generated by the outside air entering through the air permeation holes due to strong wind in the water permeable and air permeable membrane of the air permeable valve assembly will generate an external thrust at the air permeation holes, so that the air permeation holes will not be blocked, thereby ensuring that the entire air permeable valve assembly continuously performs the function of waterproof and air permeable, and reducing the maintenance and replacement cost of the waterproof and air permeable valve. Description of the Drawings

[0027] Figure 1 are two overall schematic diagrams of the present invention;

[0028] Figure 2 is a cross-sectional view of the basic structure of the bracket of the present invention;

[0029] Figure 3 is a partial view of the bracket in the present invention;

[0030] Figure 4 is a partial view of the structure where the busbar box assembly is connected to the top of the bracket;

[0031] Figure 5 is a cross-sectional view of the cooperation between the leg assembly and the busbar box assembly;

[0032] Figure 6 is a cross-sectional view of the cooperation between the first disc and the second disc in the leg assembly;

[0033] Figure 7 is a cross-sectional view of the state change of the cooperation between the first disc and the second disc in the leg assembly;

[0034] Figure 8 is a schematic diagram of the structures of the first disc and the second disc;

[0035] Figure 9 are two schematic diagrams of the busbar box assembly;

[0036] Figure 10 is a cross-sectional view of the overall structure of the busbar box assembly;

[0037] Figure 11 are two schematic diagrams of the cabinet body;

[0038] Figure 12 is a cross-sectional view of the air permeable valve assembly;

[0039] Figure 13 is a cross-sectional view of the structure of the cover in the waterproof and air permeable valve;

[0040] Figure 14 is a cross-sectional view of the cooperation between the connection assembly and the first circuit breaker;

[0041] Figure 15 It is a sectional view showing the cooperation between the connection component and the second circuit breaker;

[0042] Figure 16 It is the cooperation between the connection component and the third circuit breaker and its sectional view;

[0043] Figure 17 It is the cooperation between the connection component and the first circuit breaker or the second circuit breaker or the third circuit breaker and a partial sectional view;

[0044] Figure 18 It is a sectional view showing the cooperation between the connection component and the cabinet body;

[0045] Figure 19 It is the structure on the wire conduit of the connection component and its sectional view;

[0046] Figure 20 It is the structure on the third collar of the connection component and its sectional view;

[0047] Names of the reference numerals in the figure:

[0048] 101, sandy land; 102, support; 103, bolt; 104, cast-in-place concrete pile; 105, first hanging ear; 106, photovoltaic panel; 107, first hanging ring; 108, first stay rope; 109, second hanging ring; 110, second hanging ear; 111, electric wire;

[0049] 200, leg assembly; 201, first leg; 202, first disc; 203, first conical surface; 204, positioning groove; 205, first jack; 206, second leg; 207, second disc; 208, second conical surface; 209, second jack; 210, positioning pin; 211, insertion plate; 212, pull rod; 213, brittle nut; 214, socket; 215, locking screw;

[0050] 300, busbar box assembly; 301, cabinet body; 302, positive power inlet; 303, negative power inlet; 304, positive busbar outlet; 305, negative busbar outlet; 306, positive plug interface; 307, negative plug interface; 308, first ventilation hole; 309, cabinet door; 310, fuse; 311, first circuit breaker; 312, lightning arrester; 313, disconnecting switch; 314, second circuit breaker; 315, third circuit breaker;

[0051] 400, connection component; 401, first ring sleeve; 402, wire tube; 403, electrically connected copper sleeve; 404, first circular ring; 405, second ring sleeve; 406, first clamping strip; 407, first screw sleeve; 408, first spring; 409, second circular ring; 410, third ring sleeve; 411, third circular ring; 412, second clamping strip; 413, second screw sleeve; 414, second spring; 415, rotating sleeve; 416, third hanging ear; 417, third hanging ring; 418, second pulling rope; 419, fourth hanging ring; 420, fourth hanging ear; 421, clamping sleeve;

[0052] 500, air permeable valve component; 501, fourth ring sleeve; 502, third screw sleeve; 503, water permeable and air permeable membrane; 504, cover; 505, frustum; 506, third jack; 507, second air vent; 508, water absorption plug; 509, water absorption strip; 510, water absorption ball; 511, sleeve. Detailed implementation manners

[0053] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0054] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequential or technical meanings. The terms "connection" and "coupling" as used in this application, unless otherwise specifically stated, both include direct and indirect connection (coupling). In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0055] In the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature may be that the first feature is directly above or obliquely above the second feature, or simply means that the first feature has a higher horizontal height than the second feature. The first feature being "below", "beneath" and "under" the second feature may be that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower horizontal height than the second feature.

[0056] Such asFigures 1-20 As shown in Figures 1-20 , a photovoltaic busbar box applicable to a land maintenance site is used for collecting the outputs of a number of photovoltaic panels 106, and includes:

[0057] A busbar box assembly 300 for collecting the positive and negative outputs of four thousand photovoltaic panels 106. The busbar box assembly 300 includes a cabinet body 301. Eight fuses 310, eight first circuit breakers 311 electrically connected to the fuses 310 one by one, eight lightning arresters 312 electrically connected to the first circuit breakers 311 one by one, a disconnecting switch 313 electrically connected to the eight lightning arresters 312, a third circuit breaker 315 electrically connected to the disconnecting switch 313, and two second circuit breakers 314 connected in parallel with the third circuit breaker 315 are arranged in the cabinet body 301. A pair of positive connection inlets 302 and a pair of negative connection inlets 303 are opened on both sides of the upper end of the cabinet body 301. A positive busbar outlet 304, a negative busbar outlet 305, a positive plug-in interface 306, and a negative plug-in interface 307 are opened on one side of the lower end of the cabinet body 301. Connection assemblies 400 electrically connected to the corresponding fuses 310 are arranged in both the positive connection inlet 302 and the negative connection inlet 303. Connection assemblies 400 electrically connected to the third circuit breaker 315 are arranged in both the positive busbar outlet 304 and the negative busbar outlet 305. Connection assemblies 400 electrically connected to the two second circuit breakers 314 one by one are arranged in the positive plug-in interface 306 and the negative plug-in interface 307. The connection assembly 400 has the characteristics of buffering the tension received by the corresponding wire 111 and first disconnecting the first circuit breaker 311 or the second circuit breaker 314 or the third circuit breaker 315 when the corresponding wire 111 is pulled and disconnected. An air permeable valve assembly 500 for waterproofing, air permeability, and anti-blocking is arranged at the first air permeable hole 308 at the bottom of the cabinet body 301. A cabinet door 309 is arranged on the front side of the cabinet body 301. The cabinet body 301 is arranged on a bracket 102 for installing the photovoltaic panel 106 through a leg assembly 200 that is easily broken when impacted.

[0058] All the circuit breakers in the present invention have an arc extinguishing function and can extinguish the arcs generated during the power-off process.

[0059] In a further embodiment, such as Figure 14 , Figure 15 , Figure 16 , Figure 17 , Figure 18As shown, the connection component 400 includes a first collar 401 disposed at the positive electrode inlet 302 or the negative electrode inlet 303 or the positive electrode outlet 304 or the negative electrode outlet 305 or the positive electrode socket 306 or the negative electrode socket 307. A wire tube 402 is slidably disposed within the first collar 401. An electrically connected copper sleeve 403 electrically connected to the copper cores of the two ends of the wire 111 is disposed within the wire tube 402. An exposed end of the wire tube 402 is provided with a first circular ring 404 that cooperates with the first collar 401. A first spring 408 for driving the wire tube 402 to insert into the first collar 401 is connected between the first circular ring 404 and the side wall of the cabinet body 301. A second collar 405 is disposed on the first circular ring 404. The inner diameter of the second collar 405 is larger than the inner diameter of the wire tube 402. A plurality of first clamping bars 406 evenly distributed in the circumferential direction are disposed at the end of the second collar 405. A first screw sleeve 407 is threadedly connected to the second collar 405. A conical surface that cooperates with the first clamping bars 406 is disposed within the first screw sleeve 407. A third collar 410 is threadedly connected to the inner end of the wire tube 402. A third circular ring 411 that cooperates with the end of the wire tube 402 is disposed within the third collar 410. A plurality of second clamping bars 412 are evenly disposed in the circumferential direction at the end of the third collar 410. A second screw sleeve 413 is threadedly connected to the end of the third collar 410. A conical surface that cooperates with the second clamping bars 412 is disposed on the inner wall of the second screw sleeve 413. A second circular ring 409 is disposed on the outer side of the third collar 410. A rotating sleeve 415 is rotatably disposed on the second circular ring 409. A second pulling rope 418 connected to the switch lever of the first circuit breaker 311 or the switch lever of the second circuit breaker 314 or the switch lever of the third circuit breaker 315 is disposed on the rotating sleeve 415. A second spring 414 is connected between the second circular ring 409 and the inner wall of the cabinet body 301.

[0060] In a further embodiment, as Figure 14 , Figure 15 , Figure 16 , Figure 17 , Figure 18 As shown, a third hanging ear 416 is disposed on the rotating sleeve 415. A third hanging ring 417 is connected to the third hanging ear 416. The third hanging ring 417 is connected to a fourth hanging ring 419 through the second pulling rope 418. The fourth hanging ring 419 is connected to a fourth hanging ear 420 on the clamping sleeve 421. The clamping sleeve 421 is fixedly sleeved on the switch lever of the first circuit breaker 311 or the switch lever of the second circuit breaker 314 or the switch lever of the third circuit breaker 315 through a bolt 103.

[0061] In a further embodiment, as Figure 11 , Figure 12As shown, the air permeable valve assembly 500 includes a fourth collar 501 disposed at the first air vent 308 at the bottom of the cabinet 301. A cover 504 is threadedly connected to the lower end of the fourth collar 501. A frustum 505 that mates with the lower end of the fourth collar 501 is disposed around the bottom inside the cover 504. A water absorption plug 508 for filling the fourth collar 501 is disposed at the bottom inside the cover 504. A plurality of second air vents 507 that communicate with the bottom inside the cover 504 are evenly formed in the circumferential direction on the side wall at the lower end of the cover 504. A water absorption strip 509 is disposed in the third jack 506 at the bottom of the cover 504. One end of the water absorption strip 509 is buried in the water absorption plug 508, and the other end of the water absorption strip 509 is exposed and provided with a water absorption ball 510. A third screw sleeve 502 is threadedly connected in the first air vent 308, and a waterproof and breathable membrane is disposed inside the third screw sleeve 502.

[0062] In a further embodiment, as Figure 12 shown, a soft sleeve 511 is disposed on the outer side of the exposed portion of the water absorption strip 509.

[0063] In a further embodiment, as Figure 1 shown, the cabinet 301 is assisted to be suspended below the photovoltaic panel 106 by two first pull ropes 108 connected to the bracket 102 at both sides of its upper end.

[0064] In a further embodiment, as Figure 4 shown, a first hanging ring 107 and a second hanging ring 109 are respectively connected to the upper and lower ends of the first pull rope 108. The first hanging ring 107 is connected to the first hanging ear 105 on the bracket 102, and the second hanging ring 109 is connected to the second hanging ear 110 on the cabinet 301.

[0065] In a further embodiment, as Figure 1 、 Figure 2 shown, the bracket 102 is fixed to the concrete cast-in-place pile 104 in the sandy land 101 by bolts 103. The concrete cast-in-place pile 104 is formed by pouring steel bars and concrete in a cylindrical pit on the sandy land 101.

[0066] In a further embodiment, as Figure 5 、 Figure 6 、 Figure 7 、 Figure 8As shown, the leg assembly 200 is connected between the first leg 201 connected by bolts 103 and the second leg 206 connected to the bottom of the cabinet body 301. The upper end of the first leg 201 is provided with a first disc 202. A first conical surface 203 is provided at the upper edge of the first disc 202. Two first jacks 205 that are circumferentially spaced 180 degrees and communicate with the first conical surface 203 are provided on the lower end surface of the first disc 202. The lower end of the second leg 206 is provided with a second disc 207. A second conical surface 208 is provided at the lower edge of the second disc 207. Two second jacks 209 that communicate with the second conical surface 208 and correspond to the first jacks 205 one by one are provided on the upper end surface of the second disc 207. Two tie rods 212 passing through the first jacks 205 and the second jacks 209 are connected between the first disc 202 and the second disc 207. A brittle nut 213 that makes the first disc 202 and the second disc 207 clamp each other and is easily broken under an external force is threadedly connected to the tie rod 212. The upper end of the second leg 206 is provided with a plug board 211. The plug board 211 is matched with a socket 214 at the bottom of the cabinet body 301. A locking screw 215 that cooperates with the plug board 211 is provided in a threaded hole on the socket 214.

[0067] In a further embodiment, as Figure 6 、 Figure 7 、 Figure 8 shown, a positioning groove 204 is provided in the middle of the upper end of the first disc 202. A positioning pin 210 that cooperates with the positioning groove 204 is provided at the lower end of the second disc 207.

[0068] In the present invention, the leg assembly 200 for connecting the support bracket 102 and the busbar box assembly 300 can be disconnected between the first disc 202 and the second disc 207 when being violently impacted, so that the impact on the busbar box assembly 300 can be effectively buffered, ensuring that the cabinet body 301 of the busbar box assembly 300 will not be deformed or damaged when being impacted, and further ensuring that the electrical components in the cabinet body 301 of the busbar box assembly 300 will not be squeezed and damaged due to the deformation of the cabinet body 301. In the present invention, the connection assembly 400 provided in the positive electrode access port 302, negative electrode access port 303, positive electrode outlet port 304, negative electrode outlet port 305, positive electrode socket 306 and negative electrode socket 307 on the cabinet body 301 of the busbar box assembly 300 can effectively buffer the large pulling force exerted on the wire 111 when the equipment for maintaining vegetation hooks the exposed wire 111, avoiding the disconnection of the wire 111 when being hooked by the equipment. When the corresponding exposed wire 111 is disconnected due to a large pulling force in the present invention, the connection assembly 400 disconnects the first circuit breaker 311 or the second circuit breaker 314 or the third circuit breaker 315 on the corresponding circuit in the cabinet body 301 first, effectively avoiding the generation of electric arcs when the wire 111 is broken by tension and ensuring that no fire will occur due to the electric arcs after the wire 111 is disconnected. The connection assembly 400 provided in the positive electrode socket 306 and negative electrode socket 307 on the side wall of the cabinet body 301 of the busbar box assembly 300 and respectively connected to the positive and negative electrodes flowing out from the disconnector 313 in the cabinet body 301 provides a power taking interface for the power equipment for maintaining the vegetation under the photovoltaic panel 106, ensuring that the power equipment for maintaining the vegetation can carry out effective vegetation maintenance work due to continuous power supply. The air permeable valve assembly 500 provided at the bottom of the cabinet body 301 of the busbar box assembly 300 can effectively ventilate the inside and outside of the cabinet body 301 of the busbar box assembly 300, and at the same time absorb and discharge the water vapor generated in the cabinet body 301 through the water permeable and air permeable membrane 503, water absorbing plug 508, water absorbing strip 509 and water absorbing ball 510 therein. The vibration generated by the outside air entering through the second air vent 507 due to strong wind in the water permeable and air permeable membrane 503 of the air permeable valve assembly 500 will generate an external thrust at the second air vent 507, so that the second air vent 507 will not be blocked, and further ensuring that the entire air permeable valve assembly 500 continuously plays the function of waterproof and air permeability, reducing the maintenance and replacement cost of the waterproof and air permeable valve.

[0069] The operation process of the present invention is as follows:

[0070] In the initial state, the second drawstring 418 in the connection component 400 is always in a relaxed state, ensuring that the corresponding connection component 400 has sufficient buffer length for the tensile force on the corresponding wire 111. The first spring 408 and the second spring 414 are in a stretched state and a compressed state respectively. The first ring 404 abuts against the first collar 401. The first latch 406 at the end of the second collar 405 clamps and fixes the corresponding wire 111 under the action of the first screw sleeve 407. The third ring 411 abuts against the end of the wire conduit 402. The second latch 412 on the third collar 410 clamps and fixes the corresponding wire 111 under the action of the second screw sleeve 413. The wire conduit 402 connects the copper cores of the two wires 111 at its two ends. The first disc 202 in the leg component 200 and the second disc 207 are clamped with each other under the action of the two pull rods 212 below. The positioning pin 210 is located in the positioning groove 204 to position the first disc 202 and the second disc 207.

[0071] As Figure 18 shown, when the outer wire 111 of the connection component 400 is pulled, the pulled wire 111 will drive the entire connection component 400 to move outward by a certain amplitude, causing the first spring 408 and the second spring 414 to be further stretched and compressed respectively. The connection component 400 drives the wire 111 connected to it in the inner cabinet body 301 to move synchronously by a certain amplitude. The third collar 410 in the connection component 400 reduces the slack of the corresponding second drawstring 418. The movement of the connection component 400 can effectively buffer the tensile force on the corresponding side wire 111, preventing the wire 111 from breaking within a certain tensile range. When the movement amplitude of the connection component 400 is very large, the second drawstring 418 is tightened and pulls the switch lever of the first circuit breaker 311 or the switch lever of the second circuit breaker 314 or the switch lever of the third circuit breaker 315, causing the first circuit breaker 311 or the second circuit breaker 314 or the third circuit breaker 315 to be effectively closed before the wire 111 is broken, preventing an electric arc from being generated when the wire 111 is interrupted.

[0072] As Figure 6 、 Figure 7 shown, when the leg component 200 is impacted, the brittle nuts 213 on the two pull rods 212 break under the external force, and the two pull rods 212 are bent and deformed. The second leg 206 drives the second disc 207 to swing relative to the first disc 202 on the first leg 201 under the external force. The positioning pin 210 disengages from the positioning groove 204. The first conical surface 203 on the first disc 202 and the second conical surface 208 on the second disc 207 do not interfere with the swing of the second disc 207 relative to the first disc 202. Furthermore, when the leg component 200 is impacted, it can effectively buffer the impact force it receives, preventing the cabinet body 301 of the busbar box assembly 300 from being deformed and damaged, and further protecting the electrical components in the cabinet body 301 from being damaged by extrusion.

[0073] When the outrigger assembly 200 is damaged due to impact, the busbar box assembly 300 is suspended under the traction of the two first guy ropes 108 and will not fall and be damaged.

[0074] Such as Figure 12 As shown, the water absorption strip 509 in the air vent valve assembly 500 drives the water absorption ball 510 to swing under the action of wind, and the water in the water absorption ball 510 is discharged under the action of wind. The water absorption ball 510 that has completed drainage under the action of wind can continuously bring out the water in the water absorption plug 508 through the water absorption strip 509, so as to ensure that the water absorption plug 508 has the function of continuously absorbing the water vapor in the cabinet body 301. The elastic membrane in the air vent valve assembly 500 can vibrate by using the wind entering from the air vent holes, so as to promote the air flow in the air vent holes, and further achieve the purpose of preventing the air vent holes from being blocked.

Claims

1. A photovoltaic combiner box suitable for land maintenance sites, used to combine the outputs of several photovoltaic panels, characterized in that: include: A junction box assembly is used to combine the positive and negative outputs of four photovoltaic panels. The junction box assembly includes a cabinet, and eight fuses, eight first circuit breakers electrically connected to the fuses one by one, eight lightning arresters electrically connected to the first circuit breakers one by one, disconnectors electrically connected to the eight lightning arresters, third circuit breakers electrically connected to the disconnectors, and two second circuit breakers connected in parallel with the third circuit breakers are arranged in the cabinet. A pair of positive access ports and a pair of negative access ports are opened on both sides of the upper end of the cabinet, and a positive junction port, a negative junction port, a positive plug port, and a negative plug port are opened on one side of the lower end of the cabinet. The positive access port and the negative access port are both provided with There is a connection component electrically connected to the corresponding fuse, the positive electrode confluence outlet and the negative electrode confluence outlet are both provided with a connection component electrically connected to the third circuit breaker, the positive electrode plug interface and the negative electrode plug interface are provided with two connection components electrically connected to the second circuit breaker in a one-to-one correspondence, and the connection component has the characteristics of buffering the tension exerted on the corresponding wire and first disconnecting the first circuit breaker or the second circuit breaker or the third circuit breaker when the corresponding wire is pulled and disconnected; a waterproof, breathable and anti-blocking breathable valve component is provided at the first breathable hole at the bottom of the cabinet, a cabinet door is provided on the front side of the cabinet, and the cabinet is arranged on a bracket for installing a photovoltaic panel through a leg component that is easily broken when hit; The connecting component includes a first ring sleeve arranged at the positive electrode access port or the negative electrode access port or the positive electrode outlet or the negative electrode outlet or the positive electrode plug interface or the negative electrode plug interface, a wire tube is slidably arranged in the first ring sleeve, and an electrical connection copper sleeve electrically connected to the copper core of the wires at both ends is arranged in the wire tube, a first circular ring cooperating with the first ring sleeve is arranged at the exposed end of the wire tube, a first spring driving the wire tube to be inserted into the first ring sleeve is connected between the first circular ring and the side wall of the cabinet, a second ring sleeve is arranged on the first circular ring, the inner diameter of the second ring sleeve is larger than the inner diameter of the wire tube, a plurality of first clamping strips evenly distributed in the circumferential direction are arranged at the end of the second ring sleeve, a first screw sleeve is threadedly connected to the second ring sleeve, and the first A conical surface cooperating with a first clamping strip is arranged in a screw sleeve, the inner end of the wire tube is threadedly connected with a third ring sleeve, a third circular ring cooperating with the end of the wire tube is arranged in the third ring sleeve, a plurality of second clamping strips are evenly arranged on the end of the third ring sleeve in a circumferential direction, a second screw sleeve is threadedly connected with a second screw sleeve at the end, a conical surface cooperating with the second clamping strip is arranged on the inner wall of the second screw sleeve, a second circular ring is arranged on the outer side of the third ring sleeve, a rotating sleeve is rotatably arranged on the second circular ring, a second pull rope connected with the switch lever of the first circuit breaker or the switch lever of the second circuit breaker or the switch lever of the third circuit breaker is arranged on the rotating sleeve, and a second spring is connected between the second circular ring and the inner wall of the cabinet.

2. A photovoltaic combiner box suitable for land maintenance sites according to claim 1, characterized in that: The rotating sleeve is provided with a third hanging ear, the third hanging ear is connected to a third hanging ring, the third hanging ring is connected to a fourth hanging ring through a second pull rope, the fourth hanging ring is connected to the fourth hanging ear on the clamping sleeve, and the clamping sleeve is fixed to the switch lever of the first circuit breaker, the switch lever of the second circuit breaker, or the switch lever of the third circuit breaker through a bolt sleeve.

3. A photovoltaic combiner box suitable for land maintenance sites according to claim 1, characterized in that: The air valve assembly includes a fourth ring sleeve arranged at the first air hole at the bottom of the cabinet, the lower end of the fourth ring sleeve is threadedly connected to a cover, a frustum is arranged around the bottom of the cover and matches the lower end of the fourth ring sleeve, the bottom of the cover is provided with a water absorption plug for filling the fourth ring sleeve, a plurality of second air holes connected to the bottom of the cover are evenly arranged on the side wall of the lower end of the cover, a water absorption strip is arranged in the third plug hole at the bottom of the cover, one end of the water absorption strip is buried in the water absorption plug, the other end of the water absorption strip is exposed and provided with a water absorption ball, the first air hole is threadedly connected to a third screw sleeve, and a waterproof and breathable membrane is arranged in the third screw sleeve.

4. A photovoltaic combiner box suitable for land maintenance sites according to claim 3, characterized in that: A soft sleeve is arranged on the outer side of the exposed part of the water absorbing strip.

5. A photovoltaic combiner box suitable for land maintenance sites according to claim 1, characterized in that: The cabinet is suspended below the photovoltaic panel with the assistance of two first pull ropes connected to the bracket at both sides of the upper end thereof.

6. A photovoltaic combiner box suitable for land maintenance sites according to claim 5, characterized in that: The upper and lower ends of the first pull rope are respectively connected to a first hanging ring and a second hanging ring, the first hanging ring is connected to a first hanging ear on the bracket, and the second hanging ring is connected to a second hanging ear on the cabinet.

7. A photovoltaic combiner box suitable for land maintenance sites according to claim 1, characterized in that: The bracket is fixed to a concrete cast-in-place pile in the sand by bolts. The concrete cast-in-place pile is cast in a cylindrical pit on the sand using a steel frame and concrete.

8. The photovoltaic combiner box suitable for land maintenance sites according to claim 1, characterized in that: The leg assembly is connected to a first leg and a second leg connected to the bottom of the cabinet by bolts, the upper end of the first leg is provided with a first disc, the upper edge of the first disc is provided with a first conical surface, the lower end surface of the first disc is provided with two first sockets that are 180 degrees apart in the circumference and connected to the first conical surface, the lower end of the second leg is provided with a second disc, the lower edge of the second disc is provided with a second conical surface, the upper end surface of the second disc is provided with two second sockets that are connected to the second conical surface and correspond one to one with the first sockets, two pull rods passing through the first socket and the second socket are connected between the first disc and the second disc, the pull rods are threadedly connected with a brittle nut that clamps the first disc and the second disc to each other and is easily broken under the action of external force, the upper end of the second leg is provided with a plug plate, the plug plate cooperates with the plug sleeve at the bottom of the cabinet, and a locking screw that cooperates with the plug plate is provided in the threaded hole on the plug sleeve.

9. A photovoltaic combiner box suitable for land maintenance sites according to claim 8, characterized in that: A positioning groove is provided in the middle of the upper end of the first disc, and a positioning pin matched with the positioning groove is provided at the lower end of the second disc.

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