Lightning-proof and arc-proof photovoltaic junction box

Abstract

The utility model discloses a lightning protection and arc protection photovoltaic junction box, which comprises a cathode junction box, an intermediate junction box and an anode junction box, and further comprises an arc protection assembly, a mounting plate, a mounting piece and a lightning protection piece, the arc protection assembly comprises a shielding cover, arc extinguishing particles are arranged in the shielding cover, the mounting plate is used for mounting the shielding cover, and the mounting piece is used for mounting the lightning protection piece. The mounting piece is used for fixing the shielding cover to the top end of the mounting plate. By utilizing the design of the arc protection assembly, the mounting plate and the mounting piece, the shielding cover is sleeved outside the cathode junction box, the middle junction box or the anode junction box, then the limiting block is pressed, the insertion block is inserted into the insertion hole of the connecting plate, the movement of the connecting plate is limited along with the ejection of the limiting block, and the shielding cover is fixed; when an electric arc appears in the cathode junction box, the intermediate junction box or the anode junction box, the arc extinguishing particles can prevent the leakage of the short-circuit electric arc so as to protect the safety of a worker.

Description

Technical Field

[0001] The utility model relates to the technical field of junction boxes, in particular to a photovoltaic junction box that is lightning-proof and arc-proof. Background Art

[0002] The three-part photovoltaic junction box is a connection device used between the solar cell array and the solar charging control device. It connects the power generated by the solar cell to the external circuit and conducts the current generated by the photovoltaic module.

[0003] The traditional three-part photovoltaic junction box has a plastic shell and lacks arc-proof components inside. As a result, when the photovoltaic junction box is in use, internal electrical faults may cause short-circuit arcs, resulting in skewed arcs and causing harm to nearby maintenance personnel. Utility Model Content

[0004] The purpose of the present utility model is to provide a photovoltaic junction box that is lightning-proof and arc-proof, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a photovoltaic junction box with lightning protection and arc protection, comprising a negative junction box, an intermediate junction box, and a positive junction box, and further comprising:

[0006] An arc protection assembly is provided outside the negative terminal box, the intermediate terminal box, and the positive terminal box, and includes a cover, wherein arc extinguishing particles for extinguishing arcs are provided inside the cover;

[0007] A mounting plate, which is arranged on the sides of the negative terminal box, the middle terminal box and the positive terminal box, and is used for installing the cover;

[0008] A mounting member, the mounting member being disposed on a top end of the mounting plate and being used to fix the cover to the top end of the mounting plate;

[0009] The lightning protection component is arranged inside the negative electrode junction box, the middle junction box and the positive electrode junction box.

[0010] Preferably, the vertical cross-section of the cover is gate-shaped, a connecting plate for connecting a mounting piece is fixedly connected to the side of the bottom of the cover, and a through hole for inserting the mounting piece is provided at the top of the connecting plate.

[0011] Preferably, the arc-extinguishing particles are arranged on the top of the inner wall of the covering cover, and the connecting plates are ceramic particles.

[0012] Preferably, the mounting member includes an insert block, the bottom end of the insert block is fixedly connected to the top end of the mounting plate, and a limiting block is provided on one side of the insert block.

[0013] Preferably, a cavity is provided inside the insert block, a through hole for inserting the limiting block is provided on one side of the inner wall of the cavity, a baffle for limiting the movement of the limiting block is fixedly connected to one end of the limiting block, and an elastic block for pushing the baffle is provided on one side of the baffle.

[0014] Preferably, the lightning protection component includes a grounding wire, and the negative electrode junction box, the intermediate junction box and the positive electrode junction box are all provided with snap fasteners.

[0015] Preferably, the fastener comprises a mounting fastener, and a slot for mounting a grounding wire is provided at the top of the mounting fastener.

[0016] The technical effects and advantages of this utility model are:

[0017] The utility model utilizes the design of arc protection components, mounting plates and mounting parts. By sleeve-mounting the shielding cover on the outside of the negative terminal box, the intermediate terminal box or the positive terminal box, and then pressing the limiting block, the plug block is inserted into the insertion hole of the connecting plate. As the limiting block pops out, the movement of the connecting plate is restricted, and the shielding cover is fixed. When an arc occurs in the negative terminal box, the intermediate terminal box or the positive terminal box, the arc extinguishing particles will prevent the short-circuit arc from leaking, thereby protecting the safety of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model.

[0019] Figure 2 This is a schematic diagram of the three-dimensional structure of the arc protection component of the utility model.

[0020] Figure 3 For this utility model Figure 1 A is a schematic diagram of the enlarged structure.

[0021] Figure 4 This is a schematic diagram of the cross-sectional structure of the mounting piece of the utility model.

[0022] Figure 5 This is a schematic diagram of the three-dimensional structure of the lightning protection component and the negative terminal box of the utility model.

[0023] Figure 6 For this utility model Figure 5 Middle B is a schematic diagram of the enlarged structure.

[0024] Figure 7 It is a schematic diagram of the three-dimensional structure of the fastener of the utility model.

[0025] In the figure: 1. Negative terminal box; 2. Intermediate terminal box; 3. Positive terminal box; 4. Mounting plate; 5. Arc protection assembly; 51. Cover; 52. Connecting plate; 53. Arc extinguishing particles; 6. Mounting piece; 61. Insert block; 62. Limiting block; 63. Baffle; 64. Elastic block; 7. Grounding wire; 8. Mounting clip. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] The utility model provides Figure 1-7 The photovoltaic junction box shown is lightning-proof and arc-proof, comprising a negative junction box 1, an intermediate junction box 2, and a positive junction box 3, and further comprising:

[0028] The arc protection component 5 is arranged outside the negative terminal box 1, the middle terminal box 2 and the positive terminal box 3. The arc protection component 5 includes a cover 51. The cover 51 is provided with arc extinguishing particles 53 for extinguishing the arc.

[0029] Mounting plate 4, which is provided on the sides of negative terminal box 1, middle terminal box 2 and positive terminal box 3, and is used for mounting the cover 51;

[0030] The mounting member 6 is provided at the top of the mounting plate 4 and is used to fix the cover 51 to the top of the mounting plate 4;

[0031] Lightning protection components are arranged inside the negative terminal box 1, the middle terminal box 2 and the positive terminal box 3.

[0032] Specifically, the vertical cross-section of the cover 51 is gate-shaped, and a connecting plate 52 for connecting the mounting member 6 is fixedly connected to the side of the bottom of the cover 51. A through hole for inserting the mounting member 6 is provided at the top of the connecting plate 52, and the arc-extinguishing particles 53 are arranged on the top of the inner wall of the cover 51, and the arc-extinguishing particles 53 are ceramic particles.

[0033] Further, the negative terminal box 1, the intermediate terminal box 2 and the positive terminal box 3 form a three-part terminal box for the existing photovoltaic panel, the outer part of the negative terminal box 1, the intermediate terminal box 2 and the positive terminal box 3 is respectively provided with an anti-arc assembly 5, the inner part is respectively provided with a lightning protection piece, the outer wall of the arc extinguishing particle 53 is bonded with the inner wall of the cover 51, the arc extinguishing particle 53 is provided with a plurality of arc extinguishing particles, which are distributed on the inner wall of the cover 51, the bottom end of the cover 51 is provided with two connecting plates 52, and the cover 51 and the connecting plate 52 are integrally cast.

[0034] Specifically, the mounting piece 6 includes a plug block 61, the bottom end of the plug block 61 is fixedly connected with the top end of the mounting plate 4, one side of the plug block 61 is provided with a limiting block 62, a cavity is formed in the plug block 61, a through hole for inserting the limiting block 62 is formed in one side of the inner wall of the cavity, one end of the limiting block 62 is fixedly connected with a baffle 63 for limiting the movement of the limiting block 62, one side of the baffle 63 is provided with an elastic block 64 for pushing the baffle 63.

[0035] Further, the negative terminal box 1, the intermediate terminal box 2 and the positive terminal box 3 are respectively provided with mounting plates 4 on both sides, the mounting plates 4 and the outer shells of the negative terminal box 1, the intermediate terminal box 2 or the positive terminal box 3 are integrally cast, the bottom end of the plug block 61 is bonded and fixed with the top end of the mounting plate 4, the top end of each mounting plate 4 is provided with two groups of mounting pieces 6, the size of the limiting block 62 is 0.98 times the size of the through hole, the size of the baffle 63 is 1.2 times the size of the through hole, the elastic block 64 is an elastic rubber block, the elastic block 64 and the baffle 63 are arranged in the cavity, the elastic block 64 is always in a compressed state in the cavity, when the cover 51 is installed, first press the limiting block 62 towards the plug block 61, then insert the plug block 61 into the insertion hole of the connecting plate 52, when the limiting block 62 moves out of the insertion hole, under the action of the restoring force of the elastic block 64, the baffle 63 pushes the limiting block 62 to extend out of the plug block 61, the bottom end of the baffle 63 is attached to the top end of the connecting plate 52, thereby limiting the movement of the connecting plate 52, and the fixed installation of the cover 51 is completed.

[0036] Specifically, the lightning protection piece includes a grounding wire 7, the inner part of the negative terminal box 1, the intermediate terminal box 2 and the positive terminal box 3 is provided with a buckle piece, the buckle piece includes a mounting buckle 8, the top end of the mounting buckle 8 is provided with a clamping groove for mounting the grounding wire 7.

[0037] Furthermore, lightning protection components are provided inside the negative terminal box 1, the intermediate terminal box 2 and the positive terminal box 3. The grounding wire 7 consists of two parts, one part is annular and the other part is linear. The annular part is arranged inside the negative terminal box 1, the intermediate terminal box 2 or the positive terminal box 3, and the annular part is arranged around the edge of the interior. The linear part extends out of the outer shell of the negative terminal box 1, the intermediate terminal box 2 or the positive terminal box 3 to be connected to the earth to conduct external power. The mounting clip 8 is bonded to the inner wall of the negative terminal box 1, the intermediate terminal box 2 or the positive terminal box 3. Four mounting clips 8 are provided, and the slot on the top is an arc slot, so that the grounding wire 7 can be clamped to fix the grounding wire 7.

[0038] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A photovoltaic junction box for lightning protection and arc protection, comprising a negative electrode junction box (1), an intermediate junction box (2) and a positive electrode junction box (3), characterized in that: Also includes: An arc protection component (5), the arc protection component (5) being arranged outside the negative terminal box (1), the intermediate terminal box (2), and the positive terminal box (3), the arc protection component (5) comprising a cover (51), the interior of the cover (51) being provided with arc extinguishing particles (53) for extinguishing the arc; A mounting plate (4), the mounting plate (4) being arranged on the sides of the negative terminal box (1), the intermediate terminal box (2), and the positive terminal box (3), the mounting plate (4) being used for mounting the cover (51); A mounting member (6), the mounting member (6) being arranged on the top end of the mounting plate (4), the mounting member (6) being used to fix the cover (51) on the top end of the mounting plate (4); A lightning protection component is provided inside the negative electrode junction box (1), the middle junction box (2) and the positive electrode junction box (3).

2. The photovoltaic junction box with lightning protection and arc protection according to claim 1, characterized in that: The vertical cross-section of the cover (51) is door-shaped, and a connecting plate (52) for connecting the mounting member (6) is fixedly connected to the side of the bottom of the cover (51), and a through hole for inserting the mounting member (6) is provided at the top of the connecting plate (52).

3. The photovoltaic junction box with lightning protection and arc protection according to claim 2, characterized in that: The arc-extinguishing particles (53) are arranged on the top of the inner wall of the covering cover (51), and the arc-extinguishing particles (53) are ceramic particles.

4. The photovoltaic junction box with lightning protection and arc protection according to claim 1, characterized in that: The mounting member (6) comprises an insert block (61), the bottom end of the insert block (61) is fixedly connected to the top end of the mounting plate (4), and a limiting block (62) is provided on one side of the insert block (61).

5. The photovoltaic junction box with lightning protection and arc protection according to claim 4, characterized in that: A cavity is provided inside the insert block (61), a through hole for inserting the limiting block (62) is provided on one side of the inner wall of the cavity, a baffle (63) for limiting the movement of the limiting block (62) is fixedly connected to one end of the limiting block (62), and an elastic block (64) for pushing the baffle (63) is provided on one side of the baffle (63).

6. The photovoltaic junction box with lightning protection and arc protection according to claim 1, characterized in that: The lightning protection component comprises a grounding wire (7), and snap fasteners are provided inside the negative electrode junction box (1), the intermediate junction box (2), and the positive electrode junction box (3).

7. The photovoltaic junction box with lightning protection and arc protection according to claim 6, characterized in that: The fastener comprises a mounting fastener (8), and a slot for mounting a grounding wire (7) is provided at the top end of the mounting fastener (8).

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