CN219697600U - Combiner box and photovoltaic power station - Google Patents

Abstract

The utility model discloses a junction box and a photovoltaic power station, wherein the junction box comprises a box body, a fuse and a wiring structure, and an accommodating cavity is formed in the box body; the fuse is arranged in the accommodating cavity; the wiring structure is arranged in the accommodating cavity, the wiring structure is provided with a first wiring hole and a second wiring hole, a connecting cable of the fuse is spliced in the first wiring hole, the second wiring hole is used for splicing a connecting cable of the photovoltaic module, and the wiring structure is used for electrically conducting the fuse and the photovoltaic module. The technical scheme of the utility model aims to reduce wiring difficulty between the junction box and the photovoltaic module and improve mounting efficiency and reliability of the junction box.

Description

Combiner box and photovoltaic power station

Technical Field

The utility model relates to the technical field of photovoltaic power stations, in particular to a combiner box and a photovoltaic power station.

Background

In the existing photovoltaic power station, a plurality of photovoltaic modules are generally connected to a junction box, and then the junction box is connected with an inverter to form a photovoltaic grid-connected power generation system.

Most of the existing photovoltaic power stations directly penetrate connecting cables of photovoltaic modules into a junction box to be electrically connected with fuses arranged in the junction box, so that the junction box and the photovoltaic modules are connected and assembled. However, the outer diameter of the connecting cable of the photovoltaic module is larger, and the bending radius is larger, so that the fuse bears larger stress applied to the connecting cable; the photovoltaic module is limited by a small wiring space in the junction box, the installation difficulty of the connecting cable of the photovoltaic module in the junction box is high, tight wiring between the connecting cable of the photovoltaic module and the fuse is difficult to achieve, poor contact between the fuse and the connecting cable is further easily caused, the fuse is damaged due to overhigh temperature of the contact position of the fuse and the connecting cable, and the installation efficiency and reliability of the junction box are reduced.

Disclosure of Invention

The utility model mainly aims to provide a junction box and a photovoltaic power station, and aims to reduce wiring difficulty between the junction box and a photovoltaic module and improve installation efficiency and reliability of the junction box.

In order to achieve the above purpose, the junction box provided by the utility model comprises a box body, a fuse and a wiring structure, wherein an accommodating cavity is arranged in the box body; the fuse is arranged in the accommodating cavity; the wiring structure is arranged in the accommodating cavity, the wiring structure is provided with a first wiring hole and a second wiring hole, a connecting cable of the fuse is spliced in the first wiring hole, the second wiring hole is used for splicing a connecting cable of the photovoltaic module, and the wiring structure is used for electrically conducting the fuse and the photovoltaic module.

Optionally, the first wiring hole and the second wiring hole are respectively disposed on two opposite sides of the wiring structure, and the first wiring hole is disposed towards the fuse.

Optionally, the wiring structure includes at least two wiring units, at least two the longitudinal section length of wiring unit reduces gradually to the range upon range of setting in proper order, at least two the wiring unit all is equipped with first wiring hole with the second wiring hole.

Optionally, a first fixing hole and a second fixing hole are formed in one side of the wiring structure, the first fixing hole penetrates through the inner wall of the first wiring hole, and the second fixing hole penetrates through the inner wall of the second wiring hole. The first fixing holes and the second fixing holes are respectively inserted with a fixing piece, and the fixing pieces are used for being abutted to fix the connecting cable of the fuse and the connecting cable of the photovoltaic module.

Optionally, a conducting piece is arranged in the wiring structure, and two ends of the conducting piece are respectively arranged in the first wiring hole and the second wiring hole.

Optionally, the wiring structure is spaced from the fuse, and the wiring structure is detachably connected to the inner wall of the accommodating cavity.

Optionally, a clamping groove is formed in one side, facing to the inner wall of the accommodating cavity, of the wiring structure, a guide rail is arranged on the inner wall of the accommodating cavity, and the clamping groove is clamped with the guide rail.

Optionally, the box body is equipped with the intercommunication the through wires hole in holding chamber, the through wires hole corresponds to the setting of second wiring hole, the through wires hole is used for supplying photovoltaic module's connecting cable to wear to establish.

Optionally, the box body is further provided with a wiring cover plate, and the wiring cover plate is movably connected to the box body and opens or closes the threading hole in the moving process.

The utility model also provides a photovoltaic power station, which comprises a junction box and a photovoltaic module, wherein the junction box is the junction box, and the junction box is electrically connected with the photovoltaic module.

According to the technical scheme, the wiring structure is arranged in the box body of the junction box, so that the connecting cable of the fuse is spliced in the first wiring hole of the wiring structure, the connecting cable of the photovoltaic module is spliced in the second wiring hole of the wiring structure, and further, the connecting cable of the fuse and the connecting cable of the photovoltaic module can be electrically connected by the wiring structure to realize the electrical conduction of the fuse and the photovoltaic module, the photovoltaic module can directly splice the connecting cable on the wiring structure to realize the connection of the photovoltaic module and the junction box, the connecting cable of the bent photovoltaic module is not required to be arranged in the junction box to connect the fuse, the connection stability and the reliability between the photovoltaic module and the fuse are guaranteed, the junction installation efficiency of the junction box is improved better, and the practicability and the structural reliability of the junction box are further improved.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view showing an internal structure of an embodiment of a junction box according to the present utility model;

FIG. 2 is a partial cross-sectional view of one embodiment of the header box of FIG. 1 at a junction structure;

fig. 3 is a schematic structural view of an embodiment of a wiring structure in the junction box of fig. 1.

Reference numerals illustrate:

reference numerals	Name of the name	Reference numerals	Name of the name
				100	Collecting box	51a	First wiring hole
10	Box body	51b	Second wiring hole
				11	Accommodating cavity	53a	First fixing hole
13	Guide rail	53b	Second fixing hole
				15	Threading hole	55	Wiring unit
30	Fuse protector	57	Clamping groove
				50	Wiring structure	59	Conduction piece

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

In the present utility model, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout is meant to include three side-by-side schemes, for example, "a and/or B", including a scheme, or B scheme, or a scheme that is satisfied by both a and B. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

Most of the existing photovoltaic power stations are used for directly penetrating connecting cables of photovoltaic modules into a junction box to be electrically connected with fuses arranged in the junction box, so that the junction box and the photovoltaic modules are connected and assembled. However, the outer diameter of the connecting cable of the photovoltaic module is larger, and the bending radius is larger, so that the fuse bears larger stress applied to the connecting cable; the photovoltaic module is limited by a small wiring space in the junction box, the installation difficulty of the connecting cable of the photovoltaic module in the junction box is high, tight wiring between the connecting cable of the photovoltaic module and the fuse is difficult to achieve, poor contact between the fuse and the connecting cable is further easily caused, the fuse is damaged due to overhigh temperature of the contact position of the fuse and the connecting cable, and the installation efficiency and reliability of the junction box are reduced. In view of the above problems, the present utility model proposes a junction box 100.

Referring to fig. 1 to 3, in an embodiment of the present utility model, the junction box 100 includes a box body 10, a fuse 30, and a wiring structure 50, wherein a receiving cavity 11 is provided in the box body 10; the fuse 30 is installed in the accommodating cavity 11; the wiring structure 50 is disposed in the accommodating cavity 11, the wiring structure 50 is provided with a first wiring hole 51a and a second wiring hole 51b, the connection cable of the fuse 30 is plugged into the first wiring hole 51a, the second wiring hole 51b is used for plugging the connection cable of the photovoltaic module, and the wiring structure 50 is used for electrically conducting the fuse 30 and the photovoltaic module.

It can be appreciated that the junction box 100 can be connected with a plurality of photovoltaic module's conveying cables, and can be provided with a plurality of fuses 30 and correspond a plurality of photovoltaic module respectively and set up in junction box 100, so that each photovoltaic module can be connected in the fuse 30 department in junction box 100 earlier, and then be connected to the junction unit of junction box 100, ensure the normal connection between junction box 100 and the photovoltaic module, utilize junction box 100 and the dc-to-ac converter to be connected and realize the more convenient photovoltaic grid-connected power generation of a plurality of photovoltaic modules. By providing the wiring structure 50 in the box body 10 of the junction box 100, the connection cable of the photovoltaic module can be inserted into the first wiring hole 51a of the wiring structure 50 by inserting the connection cable of the fuse 30 into the second wiring hole 51b of the wiring structure 50 through the box body 10 of the junction box 100, or a part of the wiring structure 50 can be provided outside the box body 10, so that the connection cable of the photovoltaic module can be inserted into the second wiring hole 51b of the wiring structure 50. And then through the connecting cable at the inside electric connection fuse 30 of wiring structure 50 and photovoltaic module, can realize that photovoltaic module and the inside fuse 30 of collection flow box 100 switch on, ensured the normal wiring between photovoltaic module and the collection flow box 100, be favorable to the convenient assembly of collection flow box 100. Through utilizing wiring structure 50 to connect photovoltaic module and fuse 30, can not need to dodge other components and parts connection fuse 30 with photovoltaic module's connecting cable around in the holding chamber 11 of collection flow box 100, prevent that photovoltaic module's great connecting cable of size from buckling and occupying the space in holding chamber 11, reduced the wiring degree of difficulty between photovoltaic module's connecting cable and fuse 30, be favorable to improving the whole wiring installation effectiveness of collection flow box 100 better, further improved the structural stability and the reliability of collection flow box 100.

Wherein, in the production stage of the junction box 100, the wiring structure 50 can be directly preloaded in the box body 10, and the connecting cable of the fuse 30 is directly preloaded and spliced at the first wiring hole 51a of the wiring structure 50, so that the connecting cable of the photovoltaic module can be spliced at the second wiring hole 51b of the wiring structure 50 during construction and assembly of the photovoltaic power station, thereby realizing the integral assembly of the photovoltaic power station, being beneficial to better reducing the assembly burden of constructors on the construction site with severe environment, being convenient for improving the construction rate of the photovoltaic power station, reducing the construction cost of the photovoltaic power station and further improving the practicability of the junction box 100.

According to the technical scheme, the wiring structure 50 is arranged in the box body 10 of the junction box 100, so that the connecting cable of the fuse 30 is spliced in the first wiring hole 51a of the wiring structure 50, the connecting cable of the photovoltaic module is spliced in the second wiring hole 51b of the wiring structure 50, and further, the connecting cable of the fuse 30 and the connecting cable of the photovoltaic module can be electrically connected through the wiring structure 50, so that the connecting cable of the photovoltaic module is directly spliced on the wiring structure 50 to realize the connection of the photovoltaic module and the junction box 100, the connecting cable of the bent photovoltaic module is not required to be arranged in the junction box 100 to connect the fuse 30, the connection stability and reliability between the photovoltaic module and the fuse 30 are guaranteed, the junction installation efficiency of the junction box 100 is improved better, and the practicability and the structural reliability of the junction box 100 are further improved.

Referring to fig. 2, in one embodiment of the present utility model, the first and second wire holes 51a and 51b are respectively provided at opposite sides of the wire structure 50, and the first wire hole 51a is provided toward the fuse 30.

In this embodiment, through setting up first wiring hole 51a and second wiring hole 51b respectively in the opposite sides of wiring structure 50, can make wiring structure 50 set up in one side of fuse 30, make second wiring hole 51b set up towards fuse 30, and then make the connecting cable of fuse 30 can more conveniently be connected to wiring structure 50 on, be favorable to reducing the connecting cable between fuse 30 and the wiring structure 50 better and lay, the design overall arrangement of each components and parts in the collection flow box 100 of being convenient for, further improve the assembly convenience of collection flow box 100, improve photovoltaic power plant's assembly efficiency.

Further, referring to fig. 2 and 3, in one embodiment of the present utility model, the wiring structure 50 includes at least two wiring units 55, the longitudinal section lengths of the at least two wiring units 55 are gradually reduced, and are sequentially stacked, and the at least two wiring units 55 are each provided with a first wiring hole 51a and a second wiring hole 51b.

In this embodiment, the wiring structure 50 may include two, three, or four wiring units 55, by sequentially reducing the longitudinal sections of the plurality of wiring units 55 and sequentially stacking the plurality of wiring units 55, the wiring structure 50 may have a multi-layer structure by respectively providing the first wiring holes 51a and the second wiring holes 51b on the plurality of wiring units 55, and the wiring structure 50 adopting the multi-layer structure is beneficial to further improving the connection ports of the wiring structure 50, so that the junction box 100 may implement grid-connected power generation of a greater number of photovoltaic modules. Wherein, through reduce the vertical cross-section with a plurality of wiring units 55 that connect on the wiring structure 50 and set up in proper order, be favorable to making the wiring on two adjacent wiring units 55 separate in proper order, be convenient for improve wiring convenience of wiring structure 50, further improved the installation effectiveness of collection flow box 100, improved the practicality and the structural reliability of collection flow box 100.

Further, referring to fig. 2 and 3, in one embodiment of the present utility model, one side of the wire structure 50 is provided with a first fixing hole 53a and a second fixing hole 53b, the first fixing hole 53a is disposed through an inner wall of the first wire hole 51a, and the second fixing hole 53b is disposed through an inner wall of the second wire hole 51b. The first fixing hole 53a and the second fixing hole 53b are respectively inserted with a fixing member, and the fixing member is used for abutting and fixing the connecting cable of the fuse 30 and the connecting cable of the photovoltaic module.

In this embodiment, the first fixing hole 53a and the second fixing hole 53b are provided on one side of the wiring structure 50, the first fixing hole 53a penetrates through the inner wall of the first wiring hole 51a, the second fixing hole 53b penetrates through the inner wall of the second wiring hole 51b, the fixing member may be a screw, and the fixing member is screwed to the inner walls of the first fixing hole 53a and the second fixing hole 53b by using a fixing member inserted into the first fixing hole 53a, and after the fuse 30 is inserted into the first wiring hole 51a, the fixing member is screwed to the inner wall of the first fixing hole 53a, and one end of the fixing member is screwed into the first wiring hole 51a to abut against a connection cable pressing the fuse 30, so that the connection cable of the fuse 30 is fastened and fixed, and the wiring stability and reliability between the wiring structure 50 and the fuse 30 are further improved. Similarly, after the connecting cable of the photovoltaic module is plugged into the second wiring hole 51b, the fixing piece is in threaded connection with the inner wall of the hole of the second fixing hole 53b, and one end of the fixing piece is screwed into the second wiring hole 51b to be in butt joint with the connecting cable of the photovoltaic module, so that the clamping and fixing of the connecting cable of the photovoltaic module are realized, and the wiring stability and reliability between the wiring structure 50 and the photovoltaic module are further improved. Under the effect of mounting, can ensure better that wiring structure 50 is fixed to photovoltaic module and fuse 30's connection cable connection, further improve wiring structure 50's wiring reliability, ensure the normal operation of collection flow box 100, reduce the trouble emergence of collection flow box 100, further improved collection flow box 100's practicality and structural reliability. Meanwhile, the wiring procedure of the wiring structure 50 is simplified under the action of the fixing piece, wiring difficulty of the wiring structure 50 is reduced, mounting convenience of the junction box 100 is further improved, and mounting efficiency of the junction box 100 is improved.

Referring to fig. 2, in one embodiment of the present utility model, a conductive member 59 is disposed in the wiring structure 50, and both ends of the conductive member 59 are disposed in the first wiring hole 51a and the second wiring hole 51b, respectively.

In this embodiment, by arranging the conducting member 59 in the wiring structure 50, the conducting member 59 may be a metal member with a certain conductive property, two ends of the conducting member 59 are respectively disposed in the first wiring hole 51a and the second wiring hole 51b, and the connecting cable of the fuse 30 may be plugged into the first wiring hole 51a to be conducted with one end of the conducting member 59, so that the connecting cable of the photovoltaic module is plugged into the second wiring hole 51b to be conducted with the other end of the conducting member 59, and then under the action of the conducting member 59, the connecting cable plugged into the first wiring hole 51a and the connecting cable plugged into the second wiring hole 51b may be electrically connected, so as to realize the electrical conduction between the fuse 30 and the photovoltaic module by the wiring structure 50, and ensure the normal operation of the bus box 100. Wherein, a plurality of conducting members 59 can be arranged in the wiring structure 50, and the conducting members 59 are respectively corresponding to the first wiring holes 51a and the second wiring holes 51b, at this time, the wiring structure 50 is made of insulating plastic, and each conducting member 59 is encapsulated by the wiring structure 50 for injection molding, so that the wiring structure 50 can better isolate conduction between the conducting members 59, ensure normal operation of the bus box 100, and further improve structural stability and reliability of the bus box 100.

In one embodiment of the present utility model, the wire connection structure 50 is disposed at a distance from the fuse 30, and the wire connection structure 50 is detachably connected to the inner wall of the accommodating chamber 11.

In the present embodiment, the wiring structure 50 may be disposed at intervals from the fuse 30 in the height direction of the junction box 100, so that the wiring structure 50 may be disposed between one side of the fuse 30 and the fuse 30 for wiring connection. At this time, through connecting the wiring structure 50 detachably on the inner wall of the accommodating cavity 11, the wiring structure 50 can be threaded on the inner wall of the accommodating cavity 11 by using bolts, or the wiring structure 50 can be detached from the box body 10 for replacement or maintenance by arranging the fastening members on the inner wall of the accommodating cavity 11 to fasten the wiring structure 50, so that the daily maintenance and equipment update of the junction box 100 are facilitated, and the practicability and the structural reliability of the junction box 100 are further improved.

Further, referring to fig. 2 and 3, in one embodiment of the present utility model, a side of the wiring structure 50 facing the inner wall of the accommodating cavity 11 is provided with a clamping groove 57, and the inner wall of the accommodating cavity 11 is provided with a guide rail 13, and the clamping groove 57 is clamped with the guide rail 13.

In this embodiment, by arranging the clamping groove 57 on one side of the wiring structure 50 facing the inner wall of the accommodating cavity 11 and arranging the guide rail 13 on the inner wall of the accommodating cavity 11, the wiring structure 50 can be clamped with the guide rail 13 from one side of the wiring structure 50 by using the clamping groove 57, and the wiring structure 50 is guided and installed into the accommodating cavity 11 of the junction box 100 by using the guide rail 13, so that convenience in installing the wiring structure 50 in the junction box 100 is improved by using the structure of the clamping groove 57 and the guide rail 13, the installation efficiency of the junction box 100 is further improved, and convenience in daily maintenance and disassembly updating of the wiring structure 50 by a user is facilitated.

Referring to fig. 1 to 3, in one embodiment of the present utility model, the case body 10 is provided with a threading hole 15 communicating with the accommodating chamber 11, the threading hole 15 is provided corresponding to the second wiring hole 51b, and the threading hole 15 is used for threading a connection cable of the photovoltaic module.

In this embodiment, through setting up the through wires hole 15 of case body 10 towards the second wiring hole 51b of wiring structure 50, can make photovoltaic module's connecting cable pass through wires hole 15 and directly insert in second wiring hole 51b, be favorable to avoiding photovoltaic module's connecting cable to get into after the holding chamber 11 of case body 10 still need buckle to be connected to in wiring structure 50's the second wiring hole 51b for photovoltaic module can more conveniently be connected to wiring structure 50, further improved the whole wiring convenience of collection flow box 100, improved collection flow box 100's installation effectiveness better, improved collection flow box 100's practicality and structural reliability. The threading hole 15 may be a strip-shaped through hole, or may be a plurality of small holes, and the small holes are respectively corresponding to the second wiring holes 51b on the wiring structure 50, so that the connecting cables of the photovoltaic modules may be respectively threaded through the small holes to connect the wiring structure 50, thereby ensuring the normal operation of the combiner box 100.

Further, in one embodiment of the present utility model, the box body 10 is further provided with a junction cover plate movably connected to the box body 10 and opening or closing the threading hole 15 during the movement.

In this embodiment, by providing the wiring cover plate on the box body 10, the wiring cover plate can be utilized to close the cover cap threading hole 15 in the process of shipping and transporting the junction box 100, so that the influence of the external environment on the junction box 100 in the process of transportation is reduced, and the structural stability and reliability of the junction box 100 are further improved. In the construction and assembly process of the photovoltaic power station, the threading hole 15 can be punched through the movable wiring cover plate, so that the connecting cable of the photovoltaic module can better penetrate through the threading hole 15 to be connected to the wiring structure 50, and the normal operation of the junction box 100 is ensured. Wherein, the wiring cover plate can be in a plate structure and is rotatably connected to the box body 10 by utilizing a hinge part, and the wiring cover plate can open or close the threading hole 15 in the process of re-rotating; or, the wiring cover plate can be of a plurality of cover tube structures, and the threading hole 15 on the box body 10 can be of a plurality of small hole structures, and the wiring cover plate can be closed to the threading hole 15 by utilizing a plurality of cover tubes to be respectively clamped with a plurality of small holes of the cover cap, so that the protection of the wiring cover plate to the threading hole 15 is realized.

The utility model also provides a photovoltaic power station, which comprises a junction box 100 and a photovoltaic module, wherein the junction box 100 is electrically connected with the photovoltaic module, the specific structure of the junction box 100 refers to the above embodiments, and the photovoltaic power station adopts all the technical schemes of all the embodiments, so that the photovoltaic power station has at least all the beneficial effects brought by the technical schemes of the embodiments, and the description is omitted herein.

The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the description of the present utility model and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the utility model.

Claims (10)

1. A combiner box, comprising:

the box body is internally provided with an accommodating cavity;

the fuse is arranged in the accommodating cavity; and

the wiring structure is arranged in the accommodating cavity and is provided with a first wiring hole and a second wiring hole, a connecting cable of the fuse is inserted into the first wiring hole, the second wiring hole is used for inserting a connecting cable of the photovoltaic module, and the wiring structure is used for electrically conducting the fuse and the photovoltaic module.

2. The junction box of claim 1 wherein said first and second wire connection holes are provided on opposite sides of said wire connection structure, respectively, said first wire connection hole being disposed toward said fuse.

3. The junction box according to claim 2, wherein the junction structure includes at least two junction units, at least two of which have a longitudinal section length gradually decreasing and are sequentially stacked, and at least two of which are provided with the first junction hole and the second junction hole.

4. The junction box of claim 2, wherein a first fixing hole and a second fixing hole are formed in one side of the junction structure, the first fixing hole being formed through an inner wall of the first junction hole, and the second fixing hole being formed through an inner wall of the second junction hole;

the first fixing holes and the second fixing holes are respectively inserted with a fixing piece, and the fixing pieces are used for being abutted to fix the connecting cable of the fuse and the connecting cable of the photovoltaic module.

5. The junction box of claim 1 wherein said wiring structure is provided with a conductive member, and wherein two ends of said conductive member are disposed in said first wiring hole and said second wiring hole, respectively.

6. The junction box of any one of claims 1 to 5, wherein the wiring structure is provided at a distance from the fuse, the wiring structure being detachably connected to a cavity inner wall of the housing cavity.

7. The junction box of claim 6 wherein a side of said wiring structure facing the inner wall of said housing cavity is provided with a slot, the inner wall of said housing cavity is provided with a rail, and said slot is engaged with said rail.

8. The junction box according to any one of claims 1 to 5, wherein the box body is provided with a threading hole communicating with the accommodation chamber, the threading hole being provided corresponding to the second wiring hole, the threading hole being for threading a connection cable of a photovoltaic module.

9. The junction box of claim 8 wherein said box body is further provided with a wiring cover removably attached to said box body and opening or closing said threading aperture during movement.

10. A photovoltaic power plant, characterized in that, the photovoltaic power plant includes collection flow box and photovoltaic module, collection flow box is the collection flow box of any one of claims 1 to 9, collection flow box with photovoltaic module electric connection.