A photovoltaic module mc4 plug fixing device

Abstract

The utility model discloses a photovoltaic module MC4 plug fixing device, including support spare and connecting rod, support spare has two, two support spare are connected through connecting rod, and support spare is used for supporting in photovoltaic support section steel, support spare is fixed with support block, is provided with first clamping slot on the support block, and first clamping slot is used for supporting the cable of MC4 plug end. Install the fixing device of the application to the steel groove of photovoltaic support section steel, and the cable of two ends of MC4 plug is supported through first clamping slot respectively, and the plug is separated with steel groove, makes MC4 plug to hang in the air and place in the middle position of steel groove, avoids the seal in the aging loosening of MC4 plug, leads to rainwater to enter into the grounding fault of MC4 plug and photovoltaic support.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic power generation technology, and in particular to a photovoltaic module MC4 plug fixing device. Background Technology

[0002] In a photovoltaic (PV) power generation system, a PV string is a circuit unit formed by connecting several PV modules in series to create a certain DC power output. PV modules are connected in series via their MC4 connectors, and the current is collected by a DC combiner cable to a DC combiner box or string inverter. Currently, during PV module installation, the cables connecting the PV strings and the MC4 connectors are placed directly inside the steel channels of the PV support frame, or the MC4 connectors are suspended and fixed to the PV support frame using cable ties.

[0003] After a certain number of years of operation, the seals inside the MC4 plug placed directly in the photovoltaic (PV) mounting tray will age and loosen, allowing rainwater to enter and potentially causing grounding faults with the PV support. In severe cases, this can lead to burnout of the MC4 plug at the grounding point, blown fuses in the combiner box, and abnormal insulation impedance in the inverter, resulting in shutdown. While suspending the MC4 plug in the PV mounting tray with cable ties solves the problem of loosening seals and rainwater entering the MC4 plug, a drawback is that the cable ties must be removed during PV module inspection and replacement, and then re-secured after troubleshooting. Furthermore, with half of the cable-tied MC4 plug exposed outside the PV tray, rain and snow can fall directly on it, causing oxidation and overheating of the internal metal connections, ultimately damaging the MC4 plug. Utility Model Content

[0004] The technical problem to be solved by this utility model is to solve the problems existing in the background art mentioned above, and to provide a photovoltaic module MC4 plug fixing device, which separates the MC4 plug placed in the steel channel of the photovoltaic bracket from the steel channel, so that the MC4 plug is suspended in the middle of the steel channel, and avoids rainwater entering the MC4 plug and causing a grounding fault between the MC4 plug and the photovoltaic bracket due to the aging and loosening of the seal inside the MC4 plug.

[0005] To achieve the above-mentioned technical features, the purpose of this utility model is as follows: a photovoltaic module MC4 plug fixing device includes a support member and a connecting rod. There are two support members, which are connected by the connecting rod. The support members are used to support the photovoltaic bracket steel. A support block is fixed on the support member, and a first slot is provided on the support block. The first slot is used to support the cable at the end of the MC4 plug.

[0006] The opening of the first card slot faces upward, and the width of the opening is smaller than the width inside the first card slot. The engaging part located outside the first card slot is elastic.

[0007] The support is a flexible rod.

[0008] The support includes a first support column and a second support column. The first support column has a cavity inside, and a spring is installed inside the cavity. One end of the second support column is slidably inserted into the cavity of the first support column and abuts against the spring. The support block is fixed on the first support column.

[0009] The inner wall of the cavity of the first support column is provided with a sliding groove, and the end of the second support column that extends into the cavity is provided with a relief groove. An elastic block is fixed at the lower end of the relief groove. When the first support column is inserted into the cavity of the second support column, the elastic block extends into the sliding groove.

[0010] Support plates are fixed at both ends of the support member.

[0011] The two ends of the connecting rod are respectively fixed to the support members on both sides.

[0012] The connecting rod is fixed with a locking head at both ends, and a second locking groove is provided inside the locking head. The locking head is elastic, and the locking heads at both ends are respectively engaged with the support members on both sides.

[0013] The support member is provided with a limiting block, and the second slot is provided with a limiting groove. The limiting block is used to engage with the limiting groove.

[0014] An anti-detachment ring is provided on the support member at the lower end of the limiting block.

[0015] Compared with the prior art, the outstanding features of this utility model, which adopts the above technical solution, are: 1. Install the fixing device of this application into the steel channel of the photovoltaic bracket steel, support the cables at both ends of the MC4 plug through the first slot respectively, separate the plug from the steel channel, and place the MC4 plug in the middle of the steel channel to avoid rainwater entering the MC4 plug and causing a grounding fault due to the aging and loosening of the seal inside the MC4 plug.

[0016] 2. The support component of this utility model includes a first support column and a second support column. The first support column has a cavity inside, and a spring is installed in the cavity. One end of the second support column is slidably inserted into the cavity of the first support column and abuts against the spring, so that the support component can elastically expand and contract axially, and has better applicability.

[0017] 3. The connecting rod of this utility model is fixed with a clip head at both ends, and a second clip groove is provided in the clip head. The clip head is elastic and the clip heads at both ends are respectively engaged with the support members on both sides. In this way, the two supports and the connecting rod are independent, which facilitates production and manufacturing and also facilitates the replacement of individual parts.

[0018] 4. The support member of this utility model is provided with a limiting block, and the second slot is provided with a limiting groove. The limiting block is used to be inserted into the limiting groove to limit the direction of the support member.

[0019] 5. The support component of this utility model has an anti-detachment ring fixed at the lower end of the limiting block to prevent the connecting rod from falling off. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0021] Figure 1 This is a three-dimensional structural diagram of one embodiment of the present utility model.

[0022] Figure 2 This is a three-dimensional structural diagram of another embodiment of the present invention.

[0023] Figure 3 This is a schematic diagram of the body structure of the support member in another embodiment of the present invention.

[0024] Figure 4 This is a schematic diagram of the body structure of the connecting rod in another embodiment of the present invention.

[0025] Figure 5 for Figure 3 A schematic diagram of the longitudinal cross-sectional structure.

[0026] Figure 6 for Figure 5 Enlarged structural diagram at point A in the middle.

[0027] Figure 7 This is a diagram showing the usage state of this utility model.

[0028] Figure label: First support column 10, support plate 11, limit block 12, anti-detachment ring 13, slide groove 14; Second support column 20, clearance groove 21, elastic block 22; Support block 30, first slot 31, opening 32, engaging part 33; Connecting rod 40, locking head 41, second locking slot 42, limiting slot 43; Spring 50, photovoltaic support steel 60; MC4 plug 70, cable 71. Detailed Implementation

[0029] 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.

[0030] It should be noted that the use of terms such as "an embodiment," "an embodiment," "an exemplary embodiment," and "some embodiments" in the specification indicates that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the art.

[0031] Example 1: See Figure 1 and 2 A photovoltaic module MC4 plug fixing device includes two support members connected by the connecting rod 40. The support members are used to support the module within a photovoltaic bracket steel 60. A support block 30 is fixed to each support member, and the support block 30 has a first slot 31 for supporting the cable 71 at the end of the MC4 plug 70. Figure 7 When in use, the fixing device of this application is installed into the steel channel of the photovoltaic bracket steel 60, and the cables 71 at both ends of the MC4 plug 70 are supported by the first slot 31 respectively, separating the MC4 plug 70 from the steel channel, so that the MC4 plug 70 is suspended in the middle of the steel channel, to avoid rainwater entering the MC4 plug and the photovoltaic bracket and causing a grounding fault due to the aging and loosening of the seal inside the MC4 plug.

[0032] The first slot 31 can be a fixed U-shaped connector. In this embodiment, see [reference needed]. Figure 5 , 6 The opening 32 of the first slot 31 faces upward, and the width of the opening 32 is smaller than the width inside the first slot 31. The engaging part 33 located outside the first slot 31 is elastic. This allows the cable 71 to be elastically secured, making it easy to install and remove the cable 71, and preventing the cable 71 from easily falling out of the first slot 31.

[0033] In this embodiment, the support member is an elastic rod. For example, the support member is a plastic rod structure, which is supported in the steel channel of the photovoltaic bracket steel 60 after being bent.

[0034] To improve the stability of the support, support plates 11 are fixed at both ends of the support member.

[0035] In this embodiment, see Figure 1 The two ends of the connecting rod 40 are fixedly connected to the support members on both sides, resulting in a simple structure. Specifically, the connecting rod 40 and the support members are integrally molded plastic parts.

[0036] Example 2: Based on Example 1, see Figure 3 , 5 The support component includes a first support column 10 and a second support column 20. The first support column 10 has a cavity inside, and a spring 50 is installed inside the cavity. One end of the second support column 20 is slidably inserted into the cavity of the first support column 10 and abuts against the spring 50. A support block 30 is fixed to the first support column 10. This structure enables axial elastic expansion and contraction of the support component, allowing for a longer extendable length to accommodate different steel profile heights and improve applicability. In this embodiment, the support component is made of engineering plastic, and the spring 50 is made of stainless steel.

[0037] Further, see Figure 5 , 6 The inner wall of the cavity of the first support column 10 is provided with a sliding groove 14, and the end of the second support column 20 that extends into the cavity is provided with a relief groove 21. An elastic block 22 is fixed at the lower end of the relief groove 21. When the first support column 10 is inserted into the cavity of the second support column 20, the elastic block 22 extends into the sliding groove 14. With the above structure, the first support column 10 and the second support column 20 are prevented from separating too much during transportation and installation.

[0038] Combination Figure 6 Specifically, the first support column 10 has an axial cavity inside, which is a circular hole structure. A groove 14 is provided on the inner wall of the circular hole, but the groove 14 does not penetrate the top of the first support column 10. An elastic block 22 is fixed to the lower end of the second support column 20. When the second support column 20 is just inserted into the circular hole of the first support column 10, the elastic block 22 deforms inward into the clearance groove 21, allowing the second support column 20 to be inserted into the first support column 10. After the elastic block 22 enters the cavity, slightly rotating the second support column 20 allows the elastic block 22 to engage with the groove 14. Because the elastic block 22 elastically expands, it limits the second support column 20, making it difficult for it to come out.

[0039] Example 3: The difference between this embodiment and embodiment 1 or embodiment 2 is that, see Figure 3 , 4 The connecting rod 40 has a locking head 41 fixed at both ends. The locking head 41 has a second locking groove 42. The locking head 41 is elastic and the locking heads 41 at both ends are respectively engaged with the support members on both sides.

[0040] In this way, the two supports and the connecting rod 40 are independent, which facilitates manufacturing and the replacement of individual components. The connecting rod 40 is made of plastic.

[0041] Further, see Figure 3 The support member is provided with a limiting block 12, and the second slot 42 is provided with a limiting groove 43. The limiting block 12 is used to be inserted into the limiting groove 43 to limit the direction of the support member.

[0042] In addition, in order to ensure that the support is oriented regardless of direction during installation, the support is symmetrically fixed with limiting blocks 12 on both sides of the support block 30.

[0043] In this embodiment, the limiting block 12 is fixed on the first support column 10.

[0044] Furthermore, an anti-detachment ring 13 is fixed on the support member at the lower end of the limit block 12 to prevent the connecting rod 40 from falling off.

[0045] In this embodiment, the limiting block 12 and the anti-detachment ring 13 are integrally formed with the first support column 10.

[0046] The working principle or process of this utility model: When using, please refer to Figure 7 After the two ends of the connecting rod 40 are respectively secured to the support members, the second support column 20 is pressed down, and the spring 50 is compressed. At this time, the fixing device is placed in the steel channel of the photovoltaic bracket steel 60. After the second support column 20 is released, the spring 50 rebounds, and the second support column 20 moves upward, thereby securing the fixing device of this utility model into the steel channel of the photovoltaic bracket steel 60.

[0047] During installation, the support block 30 faces outward. Place the MC4 plug 70 between the support members on both sides of the fixing device, and insert the cables 71 at both ends of the MC4 plug 70 into the first slots 31 of the support block 30 on the support member.

[0048] While specific embodiments of the present invention have been described above, those skilled in the art should understand that the specific embodiments described are merely illustrative and not intended to limit the scope of the present invention. Any modifications and variations made by those skilled in the art in accordance with the spirit of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A photovoltaic module MC4 plug fixing device, characterized in that: It includes a support member and a connecting rod (40). There are two support members, which are connected by the connecting rod (40). The support members are used to support the photovoltaic bracket steel (60). A support block (30) is fixed on the support member. A first slot (31) is provided on the support block (30). The first slot (31) is used to support the cable (71) at the end of the MC4 plug (70).

2. The photovoltaic module MC4 plug fixing device according to claim 1, characterized in that: The opening (32) of the first card slot (31) faces upward, and the width of the opening (32) is smaller than the width inside the first card slot (31). The engaging part (33) located outside the first card slot (31) is elastic.

3. The photovoltaic module MC4 plug fixing device according to claim 1, characterized in that: The support is a flexible rod.

4. The photovoltaic module MC4 plug fixing device according to claim 1, characterized in that: The support includes a first support column (10) and a second support column (20). The first support column (10) has a cavity inside, and a spring (50) is installed inside the cavity. One end of the second support column (20) is slidably inserted into the cavity of the first support column (10) and abuts against the spring (50). The support block (30) is fixed on the first support column (10).

5. A photovoltaic module MC4 plug fixing device according to claim 4, characterized in that: The inner wall of the cavity of the first support column (10) is provided with a sliding groove (14), and the end of the second support column (20) that extends into the cavity is provided with a relief groove (21). The lower end of the relief groove (21) is fixed with an elastic block (22). When the first support column (10) is inserted into the cavity of the second support column (20), the elastic block (22) extends into the sliding groove (14).

6. A photovoltaic module MC4 plug fixing device according to any one of claims 1 to 5, characterized in that: Support plates (11) are fixed at both ends of the support member.

7. A photovoltaic module MC4 plug fixing device according to any one of claims 1 to 5, characterized in that: The two ends of the connecting rod (40) are respectively fixed to the support members on both sides.

8. A photovoltaic module MC4 plug fixing device according to any one of claims 1 to 5, characterized in that: The connecting rod (40) has a locking head (41) fixed at both ends. The locking head (41) has a second locking groove (42) inside. The locking head (41) is elastic and the locking heads (41) at both ends are respectively engaged with the support members on both sides.

9. A photovoltaic module MC4 plug fixing device according to claim 8, characterized in that: The support member is provided with a limiting block (12), and the second slot (42) is provided with a limiting groove (43). The limiting block (12) is used to be inserted into the limiting groove (43).

10. A photovoltaic module MC4 plug fixing device according to claim 9, characterized in that: An anti-detachment ring (13) is provided on the support member at the lower end of the limiting block (12).

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