Electric leakage protection device for MC4 joint of photovoltaic module

Abstract

The utility model relates to the technical field of electric leakage protection devices, in particular to an electric leakage protection device for an MC4 joint of a photovoltaic module. According to the technical scheme, the device comprises a box body, a leakage protector and a connector are arranged in the box body, the device further comprises a wire used for connecting the leakage protector and the connector, a clamping assembly comprises an installation base fixedly installed at the wire inlet end of the leakage protector, and a wedge block used for clamping the wire is arranged in the installation base. According to the utility model, the lead is prevented from falling off due to shaking during connection, so that the leakage protector can operate normally and protect a circuit, meanwhile, the influence of an external environment on the leakage protector and the joint is reduced, the joint and the leakage protector are in a relatively fixed state, and the reliability of the leakage protector is improved. Therefore, the possibility of falling off of the wire connecting part caused by joint movement is reduced, and the normal operation of equipment is further ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of leakage protection devices, in particular to a leakage protection device for an MC4 connector of a photovoltaic module. Background Art

[0002] The MC4 connector is a commonly used solar panel connector used to connect solar panels and inverters or other equipment. In order to ensure the safe operation of the photovoltaic system, a leakage protection device is usually installed in the system. The common leakage protection device uses a leakage protector. The leakage protector can detect the leakage current in the circuit and quickly cut off the power supply when a leakage is detected to prevent electric shock accidents. In the photovoltaic system, the leakage protector is usually installed between the inverter and the power grid to protect the safety of personnel and equipment. The leakage protector is connected to the MC4 connector through a wire. When the MC4 connector is connected to the leakage protector, since the MC4 connector and the leakage protector are connected through a wire and the MC4 connector and the leakage protector are independent of each other, the wire may shake during connection, causing the connector to fall off, thereby causing circuit interruption and affecting the normal operation of the equipment. Therefore, we propose a leakage protection device for the MC4 connector of the photovoltaic module. Utility Model Content

[0003] The purpose of the present utility model is to address the problem in the background technology that the MC4 connector and the leakage protector are independent of each other, and the wires may shake during connection, causing the connector to fall off, thereby causing circuit interruption and affecting the normal operation of the equipment. A leakage protection device for the MC4 connector of a photovoltaic module is proposed.

[0004] The technical solution of the utility model is: a leakage protection device for the MC4 connector of a photovoltaic module, comprising a box body, in which a leakage protector and a connector are arranged, and further comprising:

[0005] A wire used to connect the leakage protector and the connector;

[0006] A clamping assembly, the clamping assembly comprising a mounting base fixedly mounted on the incoming line end of the leakage protector, the mounting base being provided with a wedge-shaped block for clamping the wire;

[0007] Clamps for securing connectors.

[0008] Optionally, the mounting seat is an annular member with a circular through hole formed inside, and the wire passes through the circular through hole and is connected to the incoming line terminal of the leakage protector.

[0009] Optionally, the clamping assembly further includes mounting grooves opened on both sides of the mounting seat, the wedge blocks are slidably installed in the mounting grooves respectively, and the short sides of the wedge blocks are in contact with the wires.

[0010] Optionally, guide rods are fixedly installed in the installation grooves, the wedge blocks are slidably sleeved in the guide rods, and the two groups of wedge blocks are symmetrically arranged.

[0011] Optionally, a spring is fixedly connected between the mounting groove and the wedge block, and the springs are respectively sleeved on the outside of the guide rod. A convex strip is fixedly installed on the bottom of the wedge block, and a rectangular groove is provided at the bottom of the mounting groove for the convex strip to slide.

[0012] Optionally, a box door is hinged at an opening on one side of the box body, a plurality of heat dissipation holes are provided on both sides of the box body, and a plurality of connection holes are provided at the bottom of the box body.

[0013] Optionally, at least two groups of fixed blocks are fixedly installed in the box body, and an arc groove is provided on the side of the fixed block close to the box door. The clamping blocks are hinged to the two ends of the fixed block close to the box door through a rotating shaft, and a torsion spring is provided on the rotating shaft. One end of the torsion spring is fixedly connected to the clamping block, and the other end is fixedly connected to the fixed block. A rubber pad is fixedly installed on the side of the clamping block close to the fixed block.

[0014] In summary, this application includes at least one of the following beneficial technical effects:

[0015] The utility model clamps and fixes the wires connected to the MC4 connector and the leakage protector terminal through a wedge-shaped block. The device has a simple structure and is easy to use. It prevents the wires from shaking during connection and causing them to fall off, allowing the leakage protector to operate normally and protect the circuit.

[0016] The leakage protector and the connector are further covered and protected by the box body to reduce the impact of the external environment on the leakage protector and the connector. At the same time, the connector is fixed by the clamping block so that the connector and the leakage protector are in a relatively fixed state, thereby reducing the possibility of the wire connection falling off due to the movement of the connector, and further ensuring the normal operation of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Provide the overall structural diagram of the utility model;

[0018] Figure 2 A schematic diagram of the internal structure of the mounting base in the present invention is provided;

[0019] Figure 3 Schematic diagram of the structure of the clamping block.

[0020] Figure numerals: 1. Box body; 2. Leakage protector; 3. Connector; 4. Box door; 5. Heat dissipation hole; 6. Connection hole; 7. Wire; 8. Mounting seat; 81. Mounting groove; 82. Rectangular groove; 9. Fixing block; 10. Clamping block; 11. Rubber pad; 12. Torsion spring; 13. Wedge block; 14. Guide rod; 15. Spring; 16. Raised strip. DETAILED DESCRIPTION

[0021] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0022] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention.

[0023] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of the present invention.

[0024] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] It should be noted that the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or includes elements inherent to such process, method, article, or apparatus. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0026] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances. Example

[0027] like Figures 1 to 3 As shown, the utility model proposes a leakage protection device for the MC4 connector of a photovoltaic module, comprising a box body 1, a box door 4 hingedly connected to an opening on one side of the box body 1, a plurality of heat dissipation holes 5 on both sides of the box body 1, a plurality of connection holes 6 on the bottom of the box body 1, a leakage protector 2 and a connector 3 are arranged in the box body 1, and the leakage protector 2 and the connector 3 are covered and protected by the box body 1 to reduce the influence of the external environment on the leakage protector 2 and the connector 3, and also includes a wire 7 for connecting the leakage protector 2 and the connector 3;

[0028] In this embodiment, the clamping assembly includes a mounting base 8 fixedly mounted on the inlet end of the leakage protector 2. The mounting base 8 is a ring-shaped member with a circular through hole formed therein. The wire 7 passes through the circular through hole and is connected to the inlet end of the leakage protector 2.

[0029] Among them, a wedge block 13 for clamping the wire 7 is provided in the mounting seat 8, and mounting grooves 81 are opened on both sides of the mounting seat 8. The wedge blocks 13 are slidably installed in the mounting grooves 81 respectively, and the short sides of the wedge blocks 13 are in contact with the wire 7. A guide rod 14 is fixedly installed in the mounting groove 81, and the wedge blocks 13 are slidably sleeved in the guide rod 14. The two groups of wedge blocks 13 are symmetrically arranged. When connecting, the wire 7 is first inserted into the circular through hole between the mounting seats 8. The bottom of the wire 7 contacts the inclined surface of the wedge block 13. In the process of the wire 7 moving downward, the wedge blocks 13 are pushed to move to both sides;

[0030] In addition, springs 15 are fixedly connected between the mounting grooves 81 and the wedge blocks 13. Under the action of the springs 15, the short sides of the two groups of wedge blocks 13 are always tightly fitted between the wires 7, thereby achieving the clamping and fixing of the wires 7, and preventing the wires from shaking during connection and causing the wires to fall off, so that the leakage protector 2 can operate normally and protect the circuit. The springs 15 are respectively sleeved on the outer sides of the guide rods 14, and a convex strip 16 is fixedly installed at the bottom of the wedge blocks 13. A rectangular groove 82 for the convex strip 16 to slide is provided at the bottom of the mounting grooves 81. When the two groups of wedge blocks 13 move in the mounting grooves 81, the convex strip 16 slides in the rectangular groove 82, thereby improving the sliding stability of the wedge blocks 13.

[0031] The cam 12 is provided with a spring 12 at one end of which is fixedly connected to the clamping block 10 and the other end is fixedly connected to the fixing block 9. When the clamping block 10 clamps the connector 3, the clamping block 10 rotates along the axis of the rotating shaft at one end of the fixing block 9, and under the action of the torsion spring 12, the clamping blocks 10 on both sides rotate inward to clamp the connector 3, so that the connector 3 and the leakage protector 2 are in a relatively fixed state, thereby reducing the possibility of the connection of the wire 7 falling off due to the movement of the connector 3, further ensuring the normal operation of the equipment. The clamping block 10 is fixedly installed with a rubber pad 11 on one side of the fixing block 9, and the rubber pad 11 is used to protect the surface of the clamping block 10 and the connector 3 to extend its service life.

[0032] The working principle of this embodiment is as follows: in the working process of the present invention, first open the box door 4, pass the wire 7 through the connecting hole 6, and place the connector 3 between the clamping blocks 10. When the clamping blocks 10 clamp the connector 3, the clamping blocks 10 rotate at one end of the fixed block 9 with the axis of the rotating shaft, and under the action of the torsion spring 12, the clamping blocks 10 on both sides rotate inward to clamp the connector 3. When the connector 3 is placed, the bottom of the connector 3 can contact the top of a group of clamping blocks 10, so that the clamping blocks 10 support the connector 3 while clamping, thereby improving the clamping and fixing effect of the clamping blocks 10 on the connector 3, so that the connector 3 and the leakage protector 2 are in a relatively fixed state, thereby reducing the possibility of the connection of the wire 7 falling off due to the movement of the connector 3, further ensuring the normal operation of the equipment, when the conductor connected to the connector 3 is When the wire 7 is inserted into the inlet end of the leakage protector 2, the wire 7 is first inserted into the circular through hole between the mounting seat 8, and the bottom of the wire 7 contacts the inclined surface of the wedge block 13. In the process of the wire 7 moving downward, the wedge blocks 13 are pushed to move to both sides. At this time, the two groups of wedge blocks 13 move in opposite directions in the mounting groove 81, and the convex strips 16 fixedly mounted on the bottom of the wedge blocks 13 slide in the rectangular groove 82, thereby improving the sliding stability of the wedge blocks 13. Under the action of the spring 15, the short sides of the two groups of wedge blocks 13 are always tightly fitted with the wire 7, thereby achieving clamping and fixing of the wire 7, so that the connection between the wire 7 and the inlet end of the leakage protector 2 is always in a fixed state, thereby preventing the wire from shaking during connection and causing the wire to fall off, so that the leakage protector 2 can operate normally and protect the circuit.

[0033] The above specific embodiments are merely several optional embodiments of the present invention. Based on the technical solutions of the present invention and the relevant inspirations of the above embodiments, those skilled in the art may make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A leakage protection device for a photovoltaic module MC4 connector, comprising a box body (1), wherein a leakage protector (2) and a connector (3) are provided in the box body (1), characterized in that: Also includes: A wire (7) for connecting the leakage protector (2) and the connector (3); A clamping assembly, the clamping assembly comprising a mounting seat (8) fixedly mounted on the incoming line end of the leakage protector (2), wherein a wedge-shaped block (13) for clamping the conductor (7) is provided in the mounting seat (8); A clamping block (10) is used to fix the joint (3).

2. A leakage protection device for MC4 joints of photovoltaic modules according to claim 1, characterized in that: The mounting seat (8) is a ring-shaped member with a circular through hole formed therein, and the wire (7) passes through the circular through hole and is connected to the incoming line terminal of the leakage protector (2).

3. A leakage protection device for MC4 joints of photovoltaic modules according to claim 2, characterized in that: The clamping assembly further includes mounting grooves (81) provided on both sides of the mounting seat (8), the wedge blocks (13) being slidably mounted in the mounting grooves (81), and the short sides of the wedge blocks (13) being in contact with the wires (7).

4. A leakage protection device for MC4 joints of photovoltaic modules according to claim 3, characterized in that: A guide rod (14) is fixedly installed in each of the installation grooves (81), and the wedge blocks (13) are slidably sleeved in the guide rods (14). Two groups of the wedge blocks (13) are symmetrically arranged.

5. The leakage protection device for the MC4 joint of a photovoltaic module according to claim 4, characterized in that: A spring (15) is fixedly connected between the mounting groove (81) and the wedge block (13), and the spring (15) is respectively sleeved on the outside of the guide rod (14). A convex strip (16) is fixedly installed on the bottom of the wedge block (13), and a rectangular groove (82) is provided at the bottom of the mounting groove (81) for the convex strip (16) to slide.

6. The leakage protection device for the MC4 joint of a photovoltaic module according to claim 1, characterized in that: A box door (4) is hinged at an opening on one side of the box body (1), a plurality of heat dissipation holes (5) are provided on both sides of the box body (1), and a plurality of connection holes (6) are provided at the bottom of the box body (1).

7. A leakage protection device for MC4 joints of photovoltaic modules according to claim 6, characterized in that: At least two groups of fixing blocks (9) are fixedly installed in the box body (1), and an arc groove is provided on the side of the fixing block (9) close to the box door (4). The clamping block (10) is hinged to the two ends of the side of the fixing block (9) close to the box door (4) through a rotating shaft. A torsion spring (12) is provided on the rotating shaft. One end of the torsion spring (12) is fixedly connected to the clamping block (10), and the other end is fixedly connected to the fixing block (9). A rubber pad (11) is fixedly installed on the side of the clamping block (10) close to the fixing block (9).

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