CN211183901U

CN211183901U - Photovoltaic junction box without outgoing line

Info

Publication number: CN211183901U
Application number: CN202020267941.2U
Authority: CN
Inventors: 李俊超; 张良利; 杨松; 吉芸娴; 沈道军
Original assignee: Zhejiang Astronergy New Energy Development Co Ltd
Current assignee: Zhejiang Astronergy New Energy Development Co Ltd
Priority date: 2020-03-06
Filing date: 2020-03-06
Publication date: 2020-08-04
Anticipated expiration: 2030-03-06

Abstract

The utility model discloses a do not take out line photovoltaic terminal box, including the terminal box body, set up in electrically conductive metal sheet (3), bypass diode (1) and welded connection board (2) in the terminal box body, install in female public head of photovoltaic wiring (6) and the public head of photovoltaic wiring (7) in the terminal box body lateral wall mounting hole, female public head of photovoltaic wiring (6) and the public head of photovoltaic wiring (7) are connected with both ends electrically conductive metal sheet (3) through the connecting wire respectively, place in the connecting wire in the terminal box body. The photovoltaic junction box without the outgoing line ensures that the joint cannot be lapped on a roof, the working procedure of binding a photovoltaic line under a photovoltaic plate of a color steel tile roof is omitted, and the construction cost is reduced; the arc-drawing safety distance is ensured, and the fire caused by loose connection of the overlapped roof of the MC4 joint is prevented; an outgoing line 81 is omitted, so that the length of the photovoltaic module (10) which is taken out of the outgoing line is reduced, and the cost is reduced; the direct current line loss is reduced, and the generating capacity is improved.

Description

Photovoltaic junction box without outgoing line

Technical Field

The utility model relates to a photovoltaic power generation technical field especially relates to a do not take out line photovoltaic terminal box.

Background

Distributed photovoltaic power generation has been vigorously developed in recent years, with factory rooftop photovoltaic power plants taking a large share. However, the photovoltaic module on the color steel tile roof is usually installed in a flat manner, and due to the fact that the buckle contact of the positive and negative connectors of the MC4 is not firm, the arc discharge easily causes the fire caused by the firing of the heat insulation cotton under the color steel tile. In order to prevent the MC4 joint from overlapping the color steel tile roof, the photovoltaic wire needs to be bound and fixed.

However, the binding of photovoltaic wires is very complicated during construction, and the photovoltaic wires often fall off in the later period of operation of a power station, so that a binding-free and arc-pulling-resistant photovoltaic junction box suitable for a color steel tile roof is urgently needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a do not take out line photovoltaic terminal box, should not take out line photovoltaic terminal box can not the various steel tile roofing of overlap joint, removed ligature photovoltaic line from, guaranteed the arc safety distance that draws.

In order to solve the technical problem, the utility model provides a following technical scheme:

the photovoltaic junction box without the outgoing line comprises a junction box body, conductive metal plates, bypass diodes, welding connection plates, a photovoltaic junction female head and a photovoltaic junction male head, wherein the conductive metal plates, the bypass diodes and the welding connection plates are arranged in the junction box body, the photovoltaic junction female head and the photovoltaic junction male head are arranged in side wall mounting holes of the junction box body and are respectively connected with the conductive metal plates at two end parts through connecting lines, and the connecting lines are arranged in the junction box body.

Preferably, a heat insulation layer is installed on the inner wall of the junction box body and located at the position of the photovoltaic wiring female head and the position of the photovoltaic wiring male head, the heat insulation layer is used for covering the photovoltaic wiring female head and the photovoltaic wiring male head, a hole is formed in the heat insulation layer, and the connecting wire penetrates through the hole.

Preferably, the thermal insulation layer is a double thermal insulation layer.

Preferably, the heat insulation layer is an insulating plastic layer.

Preferably, the photovoltaic wiring female head and the photovoltaic wiring male head are fixed with the mounting holes in the side wall of the junction box body through sealing glue.

Preferably, the conductive metal plate is a copper sheet or a copper alloy.

The utility model provides a do not take out line photovoltaic terminal box, including terminal box body, electrically conductive metal sheet, bypass diode, welded connection board, female head of photovoltaic wiring and the public head of photovoltaic wiring, the terminal box body is the cuboid usually, and electrically conductive metal sheet, bypass diode and welded connection board set up in the terminal box body. The junction box body, the conductive metal plate, the bypass diode and the welding connection plate are common components on the market. Two mounting holes are formed in the side wall of the junction box body and are through holes, the photovoltaic wiring female head and the photovoltaic wiring male head are respectively mounted in the two mounting holes, the photovoltaic wiring female head and the photovoltaic wiring male head are fixed to the side wall of the junction box body, and the photovoltaic wiring female head and the photovoltaic wiring male head cannot move. Female head of photovoltaic wiring and photovoltaic wiring public head are connected with the electrically conductive metal sheet in both ends through the connecting wire respectively, place the terminal box body in the connecting wire, and the length of connecting wire is shorter, and it is more convenient to connect, and the connecting wire can not be dragged, firm in connection, and the security is higher.

When the photovoltaic junction box is connected with the photovoltaic component, the photovoltaic junction box without the outgoing line of the utility model is matched with the existing photovoltaic junction box with the outgoing line, the photovoltaic junction box and the existing photovoltaic junction box with the outgoing line are arranged at intervals, the photovoltaic junction female head or the photovoltaic junction male head of the outgoing line of the photovoltaic junction box with the outgoing line is connected with the photovoltaic junction male head or the photovoltaic junction female head without the outgoing line photovoltaic junction box, the joint can not be lapped on a roof, the process of binding the photovoltaic line under the photovoltaic plate of the color steel tile roof is omitted, and the construction cost is reduced; the arc-drawing safety distance is ensured, and the fire caused by loose connection of the overlapped roof of the MC4 joint is prevented; an outgoing line is omitted, the length of the photovoltaic module which is taken out is reduced, and the cost is reduced; the direct current line loss is reduced, and the generating capacity is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic view of a typical prior art outlet photovoltaic junction box;

fig. 2 is a schematic structural view of a photovoltaic junction box without an outlet according to an embodiment of the present invention;

FIG. 3 is a detail view of the photovoltaic junction box without the outlet wire;

FIG. 4 is a connection diagram of a photovoltaic module with an outgoing photovoltaic junction box and an outgoing photovoltaic junction box.

The drawings are numbered as follows:

the photovoltaic module comprises a bypass diode 1, a welding connection plate 2, a conductive metal plate 3, an outer heat insulation layer 4, an inner heat insulation layer 5, a photovoltaic wiring female head 6, a photovoltaic wiring male head 7, a photovoltaic wiring box with an outlet line 8, a photovoltaic wiring box without an outlet line 9, a photovoltaic module 10 and an outlet line 81.

Detailed Description

The core of the utility model is to provide a do not take out line photovoltaic terminal box, should not take out line photovoltaic terminal box can not the various steel tile roofing of overlap joint, removed ligature photovoltaic line from, guaranteed the safe distance of drawing an arc.

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1 to 4, fig. 1 is a schematic view of a typical wired photovoltaic junction box in the prior art; fig. 2 is a schematic structural view of a photovoltaic junction box without an outlet according to an embodiment of the present invention; FIG. 3 is a detail view of the photovoltaic junction box without the outlet wire; fig. 4 is a connection diagram of the photovoltaic module 10 with the outlet photovoltaic junction box and without the outlet photovoltaic junction box.

In a specific embodiment, the utility model provides a do not take out line photovoltaic terminal box, including the terminal box body, set up electrically conductive metal sheet 3, bypass diode 1 and welded connection board 2 in the terminal box body, install female first 6 of photovoltaic wiring and the public first 7 of photovoltaic wiring in terminal box body lateral wall mounting hole, female public first 6 of photovoltaic wiring and the public first 7 of photovoltaic wiring are connected with both ends electrically conductive metal sheet 3 through the connecting wire respectively, place in the terminal box body in the connecting wire.

In the structure, the photovoltaic junction box without the outlet wire is suitable for a color steel tile roof, and comprises a junction box body, a conductive metal plate 3, a bypass diode 1, a welding connection plate 2, a photovoltaic junction female-male head 6 and a photovoltaic junction male head 7, wherein the junction box body is a cuboid generally, and the conductive metal plate 3, the bypass diode 1 and the welding connection plate 2 are arranged in the junction box body. The junction box body, the conductive metal plate 3, the bypass diode 1 and the welding connection plate 2 are common components on the market.

The above-mentioned female public head 6 of photovoltaic wiring and the public head 7 of photovoltaic wiring of installing in terminal box body lateral wall mounting hole have been seted up two mounting holes on the lateral wall of referring to the terminal box body, and the mounting hole is the through-hole, and the female public head 6 of photovoltaic wiring and the public head 7 of photovoltaic wiring are installed respectively in two mounting holes, and the female public head 6 of photovoltaic wiring and the public head 7 of photovoltaic wiring are fixed with the lateral wall of terminal box body, and the female public head 6 of photovoltaic wiring and the public head 7 of photovoltaic wiring can not move about.

Female public head 6 of photovoltaic wiring and public head 7 of photovoltaic wiring are connected with both ends electrically conductive metal sheet 3 through the connecting wire respectively, place the terminal box body in the connecting wire, and the length of connecting wire is shorter, and it is more convenient to connect, and the connecting wire can not be dragged, firm in connection, and the security is higher.

It should be noted that, when the photovoltaic junction box is connected with the photovoltaic module 10, the photovoltaic junction box 9 without the outgoing line of the utility model is used in cooperation with the existing outgoing line photovoltaic junction box 8, the two are arranged at intervals, at this time, the photovoltaic wiring male or female head 6 of the outgoing line 81 of the outgoing line photovoltaic junction box 8 is connected with the photovoltaic wiring male or female head 7 of the outgoing line photovoltaic junction box 9 without the outgoing line photovoltaic junction box 9, the joint can not be lapped on the roof, the process of binding photovoltaic lines under the photovoltaic panel of the color steel tile roof is omitted, and the construction cost is reduced; the arc-drawing safety distance is ensured, and the fire caused by loose connection of the overlapped roof of the MC4 joint is prevented; an outgoing line 81 is omitted, so that the length of the photovoltaic module 10 which is taken out is reduced, and the cost is reduced; the direct current line loss is reduced, and the generating capacity is improved.

On the basis of the specific implementation mode, technicians in the field can carry out a plurality of changes on the photovoltaic junction box without the line according to different specific occasions, because the temperature of the bypass diode 1 of the junction box is higher, the photovoltaic joint is closer to the bypass diode 1, a heat insulation layer can be installed on the inner wall of the box body of the junction box and is positioned at the positions of the photovoltaic junction female and male heads 6 and 7, the photovoltaic junction female and male heads 6 and 7 are covered, and the photovoltaic junction female and male heads 6 and 7 are separated from the bypass diode 1 by the heat insulation layer, so that the temperature of the photovoltaic joint is reduced, and the safety and the reliability of the photovoltaic joint are ensured.

It should be noted that, the thermal insulation layer is provided with an opening, the connecting wire passes through the opening, the size of the opening is slightly larger than that of the connecting wire, the opening only enables the connecting wire to pass through, and heat close to the photovoltaic connector is reduced.

Further optimizing the technical scheme, a person skilled in the art can change the specific embodiment according to different specific occasions, the number of layers of the heat insulation layer is not limited, the specific number of layers can be set according to different specific use conditions, and the more the number of layers of the heat insulation layer is, the better the heat insulation effect is; the fewer the number of layers of the heat insulation layer, the simpler the structure and the easier the installation. In general, the heat insulation layer can be a double heat insulation layer, and comprises an outer heat insulation layer 4 and an inner heat insulation layer 5, and air is filled between the two heat insulation layers, so that the air heat insulation effect is achieved, the structure is relatively simple, and the installation is easy.

The utility model provides a do not take out line photovoltaic terminal box, under the unchangeable condition of other parts, the insulating layer can be insulating plastic layer, and the heat of stopping passes, and thermal-insulated effect is better, and the insulating layer also can be the rubber layer, and the insulating layer that can certainly also be other suitable materials is all the utility model discloses an in the protection range.

In another more reliable embodiment, on the basis of any one of the above embodiments, the photovoltaic wiring male and female connectors 6 and 7 are fixed with the mounting holes on the side walls of the junction box body by using a sealant. The photovoltaic wiring female and male heads 6 and 7 are separated from the box body and the side wall of the junction box, so that heat transfer is reduced; meanwhile, the heat conductivity coefficient of the sealant is small and is only about 0.3, so that the sealant has certain heat insulation property, heat in the junction box body is reduced from being dissipated to the photovoltaic joint, and the service life and the power of the photovoltaic module 10 are improved.

For the photovoltaic junction box without the outgoing line in each embodiment, the conductive metal plate 3 is a copper sheet or a copper alloy, so that the conductivity is better, the electric quantity loss is reduced, and the electric energy generation is improved.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

It is right above the utility model provides a do not take out line photovoltaic terminal box and introduced in detail. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The photovoltaic junction box without the outgoing line is characterized by comprising a junction box body, a conductive metal plate (3), a bypass diode (1) and a welding connection plate (2) which are arranged in the junction box body, and a photovoltaic wiring female-male head (6) and a photovoltaic wiring male head (7) which are arranged in a side wall mounting hole of the junction box body, wherein the photovoltaic wiring female-male head (6) and the photovoltaic wiring male head (7) are respectively connected with the conductive metal plates (3) at two end parts through connecting lines, and the connecting lines are arranged in the junction box body.

2. The photovoltaic junction box without the outlet wire as claimed in claim 1, wherein a heat insulation layer is installed on the inner wall of the junction box body and located at the positions of the photovoltaic junction female and male heads (6) and (7) and used for covering the photovoltaic junction female and male heads (6) and (7), and an opening is formed in the heat insulation layer, and the connecting wire penetrates through the opening.

3. The un-wired photovoltaic junction box of claim 2, wherein the insulation layer is a dual insulation layer.

4. The un-wired photovoltaic junction box of claim 2, wherein the insulating layer is an insulating plastic layer.

5. The photovoltaic junction box without outlet wires of claim 1, characterized in that the photovoltaic junction female and male heads (6, 7) are fixed with the mounting holes of the side walls of the junction box body by sealant.

6. The box according to claim 1, characterized in that the conductive metal plate (3) is a copper sheet or a copper alloy.