Photovoltaic junction box

Abstract

The utility model belongs to the technical field of junction boxes, and particularly relates to a photovoltaic junction box, which comprises a box body, a cover plate, two connecting sleeves, two sealing rings, a first connecting piece and a second connecting piece, one end of the box body is provided with a containing groove, and the surface of the box body provided with the containing groove is provided with a sealing ring groove; a sealing clamping ring is arranged on the surface of the side, close to the box body, of the cover plate, the sealing clamping ring can be clamped into the sealing ring groove to form sealing, two mounting through holes are formed in the cover plate, and first circular truncated cones are arranged in the two mounting through holes; compared with the prior art, the photovoltaic junction box provided by the utility model has better sealing performance, and can prevent dust, liquid and the like from entering the box body to influence the operation of electronic components.

Description

Technical Field

[0001] This utility model belongs to the field of junction box technology, and particularly relates to a photovoltaic junction box. Background Technology

[0002] Solar photovoltaic cells are devices that directly convert solar radiation energy into electrical energy. Photovoltaic modules are products made by connecting multiple photovoltaic cells in series and parallel and then encapsulating them. They are the basic unit of a photovoltaic power generation system. Photovoltaic junction boxes are key components that introduce the electrical energy generated by solar photovoltaic cells into the power supply system.

[0003] Since photovoltaic junction boxes are typically installed outdoors and directly exposed to various environmental conditions such as sunlight, rain, moisture, and dust, good sealing performance is crucial for ensuring the normal operation of internal electronic components and extending their service life. Existing photovoltaic junction boxes consist of a box body and a cover plate, which are detachably connected. The box body has a recess for installing electronic components, and the cover plate has holes for cables to pass through. However, there are gaps at the connection between the box body and the cover plate, allowing dust and liquids to easily enter the box body through these gaps. Furthermore, to facilitate cable entry, the holes on the cover plate are designed to be larger, which also makes it easier for dust and liquids to enter, affecting the service life of the electronic components inside the box. Therefore, improvements to the existing photovoltaic junction box structure are necessary. Utility Model Content

[0004] The purpose of this utility model is to address the aforementioned technical problems by providing a photovoltaic junction box that has good sealing properties, preventing dust, liquids, and other contaminants from entering the box and affecting the operation of electronic components.

[0005] In view of this, the present invention provides a photovoltaic junction box, comprising:

[0006] The box body has a receiving groove at one end, and a sealing ring groove is provided on the surface of the box body where the receiving groove is located. The sealing ring groove is located outside the opening of the receiving groove.

[0007] The cover plate has a sealing ring on the surface of the cover plate near the box body. The sealing ring can be inserted into the sealing ring groove to form a seal. The cover plate has two mounting through holes, and each of the two mounting through holes has a first frustum surface.

[0008] Two connecting sleeves, the inner diameter of which is adapted to the diameter of the cable, are installed in two mounting through holes respectively, and a second frustum is provided at the end of the connecting sleeve near the first frustum.

[0009] Two sealing rings are respectively disposed between the two first frustum surfaces and the two second frustum surfaces;

[0010] The first connector can connect and fix the cover plate to the box body;

[0011] The second connector can connect and fix the connecting sleeve to the mounting through hole. At this time, the sealing ring is squeezed by the first and second truncated cone surfaces, and the inner wall of the sealing ring is in contact with the cable.

[0012] In this technical solution, separating the cover plate from the box body allows operation of the electronic components in the receiving slot. When operation of the electronic components in the receiving slot is not required, the sealing ring on the cover plate is engaged with the sealing ring groove on the box body, eliminating gaps at the connection between the cover plate and the box body. At this time, the cover plate and the box body are connected and fixed by the first connector. Cables are threaded through both connecting sleeves. When the second connector connects and fixes the connecting sleeves to the mounting through hole, the sealing ring is squeezed between the first and second frustum surfaces, and the inner wall of the sealing ring contacts the cable, thereby forming a seal at the mounting through hole and ensuring the sealing of the receiving slot.

[0013] In the above technical solution, a first enlarged hole is further provided at the end of the mounting through hole that is away from the first frustum surface.

[0014] In the above technical solution, a second enlarged hole is further provided on the inner wall of the end of the connecting sleeve away from the cover plate.

[0015] In the above technical solution, a first mounting plate is provided on each of the two opposite side walls of the box body, and a first threaded hole is provided on each of the two first mounting plates. A second mounting plate is provided on each of the two opposite side walls of the cover plate, and a first connecting through hole is provided on each of the two second mounting plates. The first connector is a threaded fastener. The first connector, the first connecting through hole and the first threaded hole cooperate to connect and fix the cover plate to the box body.

[0016] In the above technical solution, further, the surface of the cover plate near the connecting sleeve has a plurality of second threaded holes arranged in a circumferential array with the axis of the mounting through hole as the center. The connecting sleeve is provided with a fixing ring, and the fixing ring is provided with a second connecting through hole opposite to the position of the second threaded hole. The second connecting fastener, the second connecting piece, the second connecting through hole and the second threaded hole cooperate to connect and fix the connecting sleeve to the mounting through hole.

[0017] In the above technical solution, furthermore, after the connecting sleeve is connected and fixed to the mounting through hole, there is a gap between the fixing ring and the surface of the cover plate.

[0018] The beneficial effects of this utility model are:

[0019] 1. By using the sealing ring and sealing groove, there is no gap between the cover plate and the box body after they are connected and fixed. In addition, in the connection between the mounting through hole and the connecting sleeve, the second frustum on the connecting sleeve and the first frustum in the mounting through hole squeeze the sealing ring, so that the inner wall of the sealing ring contacts the cable, thereby forming a seal at the mounting through hole. This improves the overall sealing performance of the photovoltaic junction box and can prevent dust, liquids and other substances from entering the box and affecting the operation of electronic components.

[0020] 2. By providing a second enlarged hole at the end of the connecting sleeve away from the cover plate, the cable can be more easily inserted into the connecting sleeve.

[0021] 3. The first connector is designed as a threaded fastener. The cover plate is connected and fixed to the box body through the first connector, the first connecting through hole and the first threaded hole. This facilitates the installation and disassembly of the cover plate and the box body. The threaded fastener is a standard part with good interchangeability and low cost of use.

[0022] 4. The second connector is designed as a threaded fastener. The connecting sleeve is connected and fixed to the mounting through hole through the cooperation of the second connector, the second connecting through hole and the second threaded hole. This facilitates the installation and disassembly between the connecting sleeve and the mounting through hole. The threaded fastener is a standard part with good interchangeability and low cost of use. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a three-dimensional structural diagram of the photovoltaic junction box in the assembled state of this utility model.

[0025] Figure 2 This is a three-dimensional structural diagram of the photovoltaic junction box in the first direction in its disassembled state according to this utility model.

[0026] Figure 3 This is a three-dimensional structural diagram of the photovoltaic junction box in the second direction in the disassembled state of this utility model.

[0027] Figure 4 This is a schematic diagram of the longitudinal cross-sectional structure of the photovoltaic junction box in the disassembled state at the mounting through hole in this utility model.

[0028] Figure 5 This is a schematic diagram of the longitudinal cross-sectional structure of the cover plate located at the mounting through hole in this utility model.

[0029] The markings in the diagram are as follows:

[0030] 1. Box body; 101. Receiving groove; 102. Sealing ring groove; 2. Cover plate; 3. Sealing retaining ring; 4. Mounting through hole; 401. First frustum; 402. First enlarged hole; 5. Connecting sleeve; 501. Second frustum; 502. Second enlarged hole; 6. Sealing ring; 7. First connector; 701. First mounting plate; 702. First threaded hole; 703. Second mounting plate; 704. First connecting through hole; 8. Second connector; 801. Second threaded hole; 802. Retaining ring; 803. Second connecting through hole; Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] In the description of this utility model, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items, and therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0033] Example 1

[0034] like Figures 1-5 As shown, this embodiment provides a photovoltaic junction box, including: a box body 1, a cover plate 2, two connecting sleeves 5, two sealing rings 6, a first connector 7, and a second connector 8;

[0035] Please see Figure 2The overall outer contour of the box 1 is a cuboid. One end of the box 1 is provided with a receiving groove 101, in which electronic components (not shown in the figure) can be installed. A sealing ring groove 102 is provided on the surface of the box 1 where the receiving groove 101 is provided. The sealing ring groove 102 is located outside the opening of the receiving groove 101 and is distributed around the opening of the receiving groove 101.

[0036] Please see Figure 3 A sealing ring 3 is provided on the surface of the cover plate 2 near the box body 1. The longitudinal section of the sealing ring 3 is adapted to the longitudinal section of the sealing ring groove 102. In this embodiment, after the sealing ring 3 is inserted into the sealing ring groove 102, the outer surface of the sealing ring 3 is in contact with the outer wall of the sealing ring groove 102, thereby forming a seal at the connection between the cover plate 2 and the box body 1. The length of the sealing ring 3 can be less than the depth of the sealing ring groove 102.

[0037] Please see Figure 2 The cover plate 2 has two mounting through holes 4, please refer to [reference needed]. Figure 4 or Figure 5 Each of the two mounting through holes 4 is provided with a first frustum 401. In this embodiment, the first frustum 401 is provided at the end of the mounting through hole 4 away from the box body 1.

[0038] Please see Figure 3 and Figure 4 The connecting sleeve 5 has a through hole that passes through both ends. The inner diameter of the connecting sleeve 5 (i.e. the diameter of the through hole) is matched with the diameter of the cable (not shown in the figure). The cable can pass through the through hole. The two connecting sleeves 5 are respectively installed in two mounting through holes 4. The end of the connecting sleeve 5 near the first frustum 401 is provided with a second frustum 501.

[0039] Please see Figure 2 Two sealing rings 6 are respectively set between the two first frustum surfaces 401 and the two second frustum surfaces 501. The sealing rings 6 can be commercially available products, such as O-rings. After the connecting sleeve 5 is connected and fixed to the mounting through hole 4, the sealing rings 6 can be squeezed by the first frustum surfaces 401 and the second frustum surfaces 501, causing the sealing rings 6 to deform and the inner wall of the sealing rings 6 to contact the cable. At this time, the sealing rings 6 block the gap between the first frustum surfaces 401 and the second frustum surfaces 501, as well as the gap between the cable and the mounting through hole 4.

[0040] The first connector 7 can connect and fix the cover plate 2 to the box body 1. Any structure in the prior art that can detachably connect the cover plate 2 to the box body 1 can be used as the first connector 7 in this embodiment.

[0041] The second connector 8 can connect and fix the connecting sleeve 5 to the mounting through hole 4. In the prior art, any structure that can detachably connect the connecting sleeve 5 to the mounting through hole 4 can be used as the second connector 8 in this embodiment.

[0042] Please refer to the structure of the photovoltaic junction box after the first connector 7 connects and fixes the cover plate 2 to the box body 1, and the second connector 8 connects and fixes the two connecting sleeves 5 to the two mounting through holes 4 respectively. Figure 1 ;

[0043] In this embodiment, the cable can be passed through the through hole and the mounting through hole 4 on the connecting sleeve 5 first, and then the connecting sleeve 5 can be connected and fixed to the mounting through hole 4. This can reduce the difficulty of passing the cable through, and at the same time ensure the sealing effect of the sealing ring 6 between the cable and the mounting through hole 4.

[0044] In this embodiment, separating the cover plate 2 from the box body 1 allows operation of the electronic components in the receiving groove 101. When operation of the electronic components in the receiving groove 101 is not required, the sealing ring 3 on the cover plate 2 is inserted into the sealing ring groove 102 on the box body 1, so that there is no gap at the connection between the cover plate 2 and the box body 1. At this time, the cover plate 2 and the box body 1 are connected and fixed by the first connector 7. Cables are threaded through both connecting sleeves 5. When the second connector 8 connects and fixes the connecting sleeve 5 to the mounting through hole 4, the sealing ring 6 is squeezed between the first frustum surface 401 and the second frustum surface 501, and the inner wall of the sealing ring 6 contacts the cable, thereby forming a seal at the mounting through hole 4 to ensure the sealing of the receiving groove 101.

[0045] In this embodiment, the structure of the electronic components and the cable in the receiving groove 101 are well known in the art and are not improvements to this embodiment, so they will not be described in detail here.

[0046] Example 2

[0047] Based on Example 1, this embodiment further improves the structure of the mounting through hole 4;

[0048] Please see Figure 4 or Figure 5 A first enlarged hole 402 is provided at the end of the mounting through hole 4 away from the first frustum surface 401. The diameter of the first enlarged hole 402 is larger than the diameter of the cable. The shape of the first enlarged hole 402 can be as follows: Figure 4 and Figure 5 The frustum shown in the figure has a smooth transition between the sidewall of the first enlarged hole 402 and the sidewall of the mounting through hole 4. This makes it easier for the cable to pass through the mounting through hole 4 when it passes through the cover plate 2 from the side near the box 1.

[0049] Example 3

[0050] Based on Embodiment 1, this embodiment further improves the structure of the connecting sleeve 5;

[0051] Please see Figure 1 or Figure 2 A second enlarged hole 502 is provided on the inner wall of the end of the connecting sleeve 5 away from the cover plate 2. The diameter of the second enlarged hole 502 is larger than the diameter of the cable, and the shape of the second enlarged hole 502 can be as follows: Figure 1 and Figure 2 The frustum surface shown in the figure has a smooth transition between the sidewall of the second enlarged hole 502 and the sidewall of the through hole. This reduces the difficulty of the cable passing through the through hole when the cable passes through from the side of the connecting sleeve 5 away from the cover plate 2.

[0052] Example 4

[0053] Based on Embodiment 1, this embodiment also discloses a connection method between the box body 1 and the cover plate 2;

[0054] Please see Figure 2 and Figure 3 The box body 1 has a first mounting plate 701 on each of its two opposite side walls. The two first mounting plates 701 are provided with a first threaded hole 702. The first threaded hole 702 can be a through hole or a blind hole.

[0055] A second mounting plate 703 is provided on each of the two opposite side walls of the cover plate 2. A first connecting through hole 704 is provided on each of the two second mounting plates 703. The first connecting through hole 704 penetrates the two opposite surfaces of the second mounting plate 703 along the axial direction.

[0056] The first connector 7 is a threaded fastener, such as a screw or bolt. The first connector 7 has a fixed end and a threaded end. The threaded end of the first connector 7 can pass through the first connecting through hole 704 and can be threadedly engaged with the first threaded hole 702. The fixed end of the first connector 7 cannot pass through the first connecting through hole 704.

[0057] When assembling the box body 1 and the cover plate 2, the threaded end of the first connector 7 passes through the first connecting through hole 704 and engages with the first threaded hole 702 to connect and fix the cover plate 2 and the box body 1.

[0058] Example 5

[0059] Based on Embodiment 1, this embodiment also discloses a connection method between the connecting sleeve 5 and the mounting through hole 4;

[0060] Please see Figure 2The surface of the cover plate 2 near the connecting sleeve 5 has multiple second threaded holes 801 arranged in a circular array around the axis of the mounting through hole 4. The second threaded holes 801 can be through holes or blind holes. In the figure, four second threaded holes 801 are arranged in an array around each mounting through hole 4 as an example.

[0061] A fixing ring 802 is fixedly connected to the outer wall of the connecting sleeve 5. The fixing ring 802 is provided with a second connecting through hole 803 that is opposite to the position of the second threaded hole 801. The second connecting through hole 803 passes through the two opposite surfaces of the fixing ring 802 along the axial direction.

[0062] The second connector 8 is a threaded fastener, such as a screw or bolt. The second connector 8 has a fixed end and a threaded end. The threaded end of the second connector 8 can pass through the second connecting through hole 803 and can be threadedly engaged with the second threaded hole 801. The fixed end of the second connector 8 cannot pass through the second connecting through hole 803.

[0063] When assembling the connecting sleeve 5 and the mounting through hole 4, the threaded end of the second connecting piece 8 passes through the second connecting through hole 803 and engages with the second threaded hole 801 to connect and fix the connecting sleeve 5 and the mounting through hole 4.

[0064] In this embodiment, after the connecting sleeve 5 is connected and fixed to the mounting through hole 4, there is a gap between the fixing ring 802 and the surface of the cover plate 2. Thus, by rotating the second connecting piece 8, the squeezing pressure on the sealing ring 6 can be adjusted to ensure the sealing effect of the sealing ring 6 between the cable and the mounting through hole 4.

[0065] The embodiments of the present invention have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A photovoltaic junction box, characterized in that, include: Box body (1), one end of the box body (1) is provided with a receiving groove (101), and the surface of the receiving groove (101) of the box body (1) is provided with a sealing ring groove (102), the sealing ring groove (102) is located outside the opening of the receiving groove (101); The cover plate (2) has a sealing ring (3) on the surface of the cover plate (2) near the box body (1). The sealing ring (3) can be inserted into the sealing ring groove (102) to form a seal. The cover plate (2) has two mounting through holes (4). Each of the two mounting through holes (4) has a first frustum (401). Two connecting sleeves (5), the inner diameter of the connecting sleeves (5) is adapted to the diameter of the cable, the two connecting sleeves (5) are respectively installed in the two mounting through holes (4), and a second frustum (501) is provided at the end of the connecting sleeve (5) near the first frustum (401); Two sealing rings (6) are respectively disposed between two first frustum surfaces (401) and two second frustum surfaces (501); The first connector (7) can connect and fix the cover plate (2) to the box body (1); The second connector (8) can connect and fix the connecting sleeve (5) to the mounting through hole (4). At this time, the sealing ring (6) is squeezed by the first frustum (401) and the second frustum (501), and the inner wall of the sealing ring (6) is in contact with the cable.

2. The photovoltaic junction box according to claim 1, characterized in that: The mounting through hole (4) has a first enlarged hole (402) at the end away from the first frustum surface (401).

3. The photovoltaic junction box according to claim 1, characterized in that: A second enlarged hole (502) is provided on the inner wall of the end of the connecting sleeve (5) away from the cover plate (2).

4. The photovoltaic junction box according to claim 1, characterized in that: The box body (1) is provided with a first mounting plate (701) on each of its two opposite side walls, and a first threaded hole (702) is provided on each of the two first mounting plates (701). The cover plate (2) is provided with a second mounting plate (703) on each of its two opposite side walls, and a first connecting through hole (704) is provided on each of the two second mounting plates (703). The first connector (7) is a threaded fastener. The first connector (7), the first connecting through hole (704) and the first threaded hole (702) cooperate to connect and fix the cover plate (2) to the box body (1).

5. The photovoltaic junction box according to claim 1, characterized in that: The surface of the cover plate (2) near the connecting sleeve (5) has a plurality of second threaded holes (801) arranged in a circular array around the axis of the mounting through hole (4). The connecting sleeve (5) is provided with a fixing ring (802), and the fixing ring (802) is provided with a second connecting through hole (803) opposite to the position of the second threaded hole (801). The second connector (8) is a threaded fastener. The second connector (8), the second connecting through hole (803) and the second threaded hole (801) cooperate to connect and fix the connecting sleeve (5) to the mounting through hole (4).

6. The photovoltaic junction box according to claim 5, characterized in that: After the connecting sleeve (5) is connected and fixed to the mounting through hole (4), there is a gap between the fixing ring (802) and the surface of the cover plate (2).

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