Photovoltaic junction box transmission device

Abstract

The utility model discloses a photovoltaic junction box transmission device, which relates to the technical field of photovoltaic junction boxes and comprises a metal bottom plate and a transmission assembly. According to the photovoltaic junction box transmission device provided by the invention, through the arrangement of the connecting assembly, one end of the cable is peeled off, the cable passes through the middle hole of the rotating handle and extends into the box cavity through the hollow inner cavity of the elastic clamping piece, the internal wire rod of the cable is extruded and fixed on the conducting strip through the fastening screw rod, and then the rotating handle is rotated, so that the cable is fixed on the conducting strip; under the matching action of the rotating handle and the threaded opening in the top of the base, the inner conical surface on the inner side of the bottom of the rotating handle extrudes the outer inclined surface on the outer side of the top of the elastic clamping piece, so that the elastic clamping piece is folded and combined to tightly wrap the cable, the cable can be effectively prevented from loosening and falling off, and continuous transmission of current is guaranteed; the base plate is additionally arranged at the front end of the top of the metal bottom plate, so that the transmission cable is flush with the opening of the middle hole, and the tensioning force caused by the height difference can be effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic junction boxes, in particular to a photovoltaic junction box transmission device. Background Art

[0002] The photovoltaic junction box is a connecting device between the solar cell array composed of solar cell modules and the solar charging control device. Its main function is to connect and protect solar photovoltaic modules, connect the power generated by solar cells to external lines, and conduct the current generated by photovoltaic modules.

[0003] In the existing technical solution, the transmission cable and the junction box are connected by a cable connector. There is a tensioning force between the cable and the cable connector, which can easily cause the cable to loosen, fall off, or have poor contact. The existing conventional practice is to provide a cable clamp on the photovoltaic device and fix the cable with the cable clamp, but special holes need to be drilled to install the clamp, which is cumbersome and not convenient and quick enough.

[0004] Therefore, in view of this, the existing structural deficiencies are studied and improved, and a photovoltaic junction box transmission device is proposed. Utility Model Content

[0005] The purpose of the utility model is to provide a photovoltaic junction box transmission device to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a photovoltaic junction box transmission device, comprising a metal base plate and a transmission component, wherein a box body is integrally fixed to the top rear end of the metal base plate, and a box cavity is opened inside the box body, and the transmission component is fixedly installed at the bottom end of the box cavity, and the transmission component comprises a conductive sheet, a fastening screw, a connecting sheet, a conductive wire and a capacitor, the top thread of the conductive sheet is fitted with a fastening screw, and a connecting sheet is welded and fixed to the rear end of the conductive sheet, conductive wires are connected between adjacent connecting sheets, and a capacitor is arranged in the middle of the conductive wire.

[0007] Furthermore, the bottom of the metal base plate is coated with thermal conductive silicone grease, and the metal base plate is fixed to the metal frame of the photovoltaic module by bolts.

[0008] Furthermore, a backing plate is fixed by bolts on the front end of the top of the metal bottom plate, and brackets are symmetrically provided on both sides of the backing plate.

[0009] Furthermore, connecting components are fixed on both sides of the front of the box body, and the connecting components include a base, a connecting plate, an elastic clip and an outer bevel. A connecting plate is fixed to the bottom end of the base, and a hollow elastic clip is arranged in an array on the top of the connecting plate, and an outer bevel is provided on the outer side of the top of the elastic clip.

[0010] Furthermore, the connecting assembly also includes a threaded opening and a rotary handle. The top opening of the base is provided with a threaded opening, and the inner side of the threaded opening is threadedly matched with the rotary handle.

[0011] Furthermore, the connecting component also includes a middle hole and an inner conical surface. The middle part of the rotating handle is provided with a middle hole, and the middle hole coincides with the central axis of the elastic clip array. The inner side of the bottom of the rotating handle is provided with an inner conical surface, and the inner conical surface is squeezed and matched with the outer inclined surface.

[0012] Furthermore, a moisture-proof pad is provided at the top opening of the box body, and convex ribs extend inwardly from the four corners of the box body, and a threaded hole is provided in the middle of the convex ribs.

[0013] Furthermore, a box cover is buckled on the top of the box body, and the box cover is fixed to the threaded holes through screws.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. The utility model adopts the setting of the transmission component. When the outer insulation layer of the cable is stripped and inserted into the junction box for connection, the internal wire of the cable is squeezed and fixed on the conductive sheet through the fastening screw matched with the thread on the top of the conductive sheet to prevent the transmission of current from being affected by the falling of the wire. When in use, the cable at one end transmits the current generated by the photovoltaic module to the cable at the other end through the conductive wire and capacitor in the transmission component, and then transmits the current to the storage place through the cable at the other end. In order to prevent the inside of the junction box from getting damp and affecting the current transmission, the application provides a moisture-proof effect for the inside of the box cavity by setting a moisture-proof pad at the connection between the box cover and the box body, avoiding moisture from entering the inside of the junction box and affecting the transmission of current. In order to optimize the heat dissipation performance of the junction box of the application, thermal conductive silicone grease is coated on the bottom of the metal bottom plate. When the metal bottom plate is fixed to the metal frame of the photovoltaic module by bolts, the heat accumulated in the junction box is conducted to the metal frame of the photovoltaic module through the metal bottom plate and the thermal conductive silicone grease, so that the electrical components in the junction box are in an appropriate temperature and humidity environment to ensure the current transmission effect.

[0016] 2. The utility model, through the setting of the connection component, peels off the outer skin of one end of the cable, passes it through the middle hole of the rotary handle, extends into the box cavity through the hollow inner cavity of the elastic clip, and squeezes and fixes the internal wire of the cable on the conductive sheet through the tightening screw. Then the rotary handle is rotated, and under the cooperation of the rotary handle and the threaded opening on the top of the base, the inner conical surface on the inner side of the bottom of the rotary handle squeezes the outer inclined surface on the outer side of the top of the elastic clip, so that the elastic clip is contracted and merged to tightly wrap the cable, which can effectively prevent the cable from loosening and falling off, and ensure the continuous transmission of current. In addition, by adding a pad at the top front end of the metal bottom plate, the transmission cable is flush with the middle hole opening, reducing the tension caused by the height difference, and further avoiding the loosening, falling off and poor contact of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall external structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the overall internal structure of the utility model;

[0019] Figure 3 It is a schematic diagram of the internal structure of the connection component of the utility model.

[0020] In the figure: 1. Metal bottom plate; 2. Thermal grease; 3. Pad; 4. Bracket; 5. Box body; 6. Connecting assembly; 601. Base; 602. Connecting plate; 603. Elastic clip; 604. Outer bevel; 605. Threaded opening; 606. Rotary handle; 607. Middle hole; 608. Inner cone; 7. Box cavity; 8. Moisture-proof pad; 9. Raised rib; 10. Threaded hole; 11. Box cover; 12. Screw; 13. Transmission assembly; 1301. Conductive sheet; 1302. Fastening screw; 1303. Connecting sheet; 1304. Conductive wire; 1305. Capacitor. DETAILED DESCRIPTION

[0021] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0022] like Figure 1 to Figure 2As shown, a photovoltaic junction box transmission device includes a metal base plate 1 and a transmission component 13, the bottom of the metal base plate 1 is coated with thermal conductive silicone grease 2, and the metal base plate 1 is fixed to the metal frame of the photovoltaic component by bolts, a box body 5 is fixed to the top rear end of the metal base plate 1 in an integrated manner, and a box cavity 7 is opened inside the box body 5, a moisture-proof pad 8 is arranged at the top opening of the box body 5, and convex ribs 9 extend inwardly from the four corners of the box body 5, and a threaded hole 10 is opened in the middle of the convex rib 9, a box cover 11 is buckled on the top of the box body 5, and the box cover 11 is screwed with the box body 5 by screws 12 The threaded holes 10 are fixed. In order to prevent the inside of the junction box from getting damp and affecting the current transmission, the present application sets a moisture-proof pad 8 at the connection between the box cover 11 and the box body 5 to provide a moisture-proof effect for the inside of the box cavity 7 to prevent moisture from entering the inside of the junction box and affecting the current transmission. In order to optimize the heat dissipation performance of the junction box of the present application, a thermal conductive silicone grease 2 is coated on the bottom of the metal base plate 1. When the metal base plate 1 is fixed to the metal frame of the photovoltaic module by bolts, the heat accumulated in the junction box is conducted to the photovoltaic module through the metal base plate 1 and the thermal conductive silicone grease 2. The metal frame of the parts makes the electrical components in the junction box in an appropriate temperature and humidity environment to ensure the current transmission effect. The transmission component 13 is fixedly installed at the bottom of the box cavity 7. The transmission component 13 includes a conductive sheet 1301, a fastening screw 1302, a connecting sheet 1303, a conductive wire 1304 and a capacitor 1305. The top thread of the conductive sheet 1301 is matched with the fastening screw 1302, and the connecting sheet 1303 is welded and fixed at the rear end of the conductive sheet 1301. The conductive wire 1304 is connected between adjacent connecting sheets 1303, and the conductive wire A capacitor 1305 is provided in the middle of 1304. When the outer insulation layer of the cable is stripped and inserted into the junction box for connection, the inner wire of the cable is squeezed and fixed on the conductive sheet 1301 through the fastening screw 1302 with the thread matching at the top of the conductive sheet 1301 to prevent the transmission of current from being affected by the falling of the wire. When in use, the cable at one end transmits the current generated by the photovoltaic module to the cable at the other end through the conductive wire 1304 and the capacitor 1305 in the transmission component 13, and then the current is transmitted to the storage place through the cable at the other end;

[0023] like Figures 1 to 3As shown, a pad 3 is fixed by bolts on the front end of the top of the metal bottom plate 1, and brackets 4 are symmetrically provided on both sides of the pad 3. By installing the pad 3 on the front end of the top of the metal bottom plate 1, the transmission cable is flush with the opening of the middle hole 607, reducing the tension caused by the height difference, and further avoiding the loosening, falling off and poor contact of the cable. Connecting components 6 are fixed on both sides of the front of the box body 5, and the connecting component 6 includes a base 601, a connecting plate 602, an elastic clip 603 and an outer bevel 604. A connecting plate 602 is fixed to the bottom end of the base 601, and a hollow elastic clip 603 is arranged in an array on the top of the connecting plate 602, and an outer bevel 604 is provided on the outer side of the top of the elastic clip 603. The connecting component 6 also includes a threaded opening 605 and a rotary handle 606. The top opening of the base 601 is provided with a threaded opening 605, and the inner thread of the threaded opening 605 is matched with the rotary handle 606. The connecting component 6 also includes The middle hole 607 and the inner conical surface 608 are included. The middle part of the rotary handle 606 is provided with a middle hole 607, and the middle hole 607 coincides with the central axis of the elastic clip 603 array. The inner side of the bottom of the rotary handle 606 is provided with an inner conical surface 608, and the inner conical surface 608 is pressed and matched with the outer inclined surface 604. One end of the cable is peeled off the outer skin, and passed through the middle hole 607 of the rotary handle 606, and extended into the box cavity 7 through the hollow inner cavity of the elastic clip 603, and fastened by the screw 1 302 squeezes and fixes the inner wire of the cable on the conductive sheet 1301, and then rotates the handle 606. Under the cooperation of the handle 606 and the threaded opening 605 at the top of the base 601, the inner conical surface 608 on the inner side of the bottom of the handle 606 squeezes the outer inclined surface 604 on the outer side of the top of the elastic clip 603, so that the elastic clip 603 is contracted and merged, tightly wrapping the cable, which can effectively prevent the cable from loosening and falling off, and ensure the continuous transmission of current.

[0024] Working principle: When using this photovoltaic junction box transmission device, peel off the outer skin of one end of the cable, pass it through the middle hole 607 of the rotary handle 606, extend it into the box cavity 7 through the hollow inner cavity of the elastic clip 603, and squeeze the internal wire of the cable on the conductive sheet 1301 by tightening the screw 1302, then rotate the rotary handle 606, and under the cooperation of the rotary handle 606 and the threaded opening 605 at the top of the base 601, the inner conical surface 608 on the inner side of the bottom of the rotary handle 606 squeezes the elastic clip 603. The outer bevel 604 on the outer side of the top of the clip 603 makes the elastic clip 603 close and merge, tightly wrapping the cable, which can effectively prevent the cable from loosening and falling off, and ensure the continuous transmission of current. In addition, by installing a pad 3 on the top front end of the metal bottom plate 1, the transmission cable is flush with the opening of the middle hole 607, reducing the tension caused by the height difference, further avoiding the loosening, falling off and poor contact of the cable. When the outer insulation layer of the cable is stripped off and inserted into the junction box for connection, the conductive The fastening screw 1302 with threaded engagement at the top of the sheet 1301 squeezes and fixes the internal wire of the cable on the conductive sheet 1301 to prevent the transmission of current from being affected by the falling of the wire. When in use, the cable at one end transmits the current generated by the photovoltaic module to the cable at the other end through the conductive wire 1304 and the capacitor 1305 in the transmission component 13, and then transmits the current to the storage place through the cable at the other end. In order to prevent the inside of the junction box from getting damp and affecting the current transmission, the present application provides a moisture-proof pad 8 at the connection between the box cover 11 and the box body 5 to provide a moisture-proof effect for the inside of the box cavity 7 to prevent moisture from entering the inside of the junction box and affecting the transmission of current. In order to optimize the heat dissipation performance of the junction box of the present application, thermal conductive silicone grease 2 is coated on the bottom of the metal base plate 1. When the metal base plate 1 is fixed to the metal frame of the photovoltaic module by bolts, the heat accumulated inside the junction box is conducted to the metal frame of the photovoltaic module through the metal base plate 1 and the thermal conductive silicone grease 2, so that the electrical components in the junction box are in an appropriate temperature and humidity environment to ensure the current transmission effect.

[0025] The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A photovoltaic junction box transmission device, characterized in that: The invention comprises a metal bottom plate (1) and a transmission component (13), wherein a box body (5) is integrally fixed to the top rear end of the metal bottom plate (1), and a box cavity (7) is provided inside the box body (5), and the transmission component (13) is fixedly installed at the bottom end of the box cavity (7), and the transmission component (13) comprises a conductive sheet (1301), a fastening screw (1302), a connecting sheet (1303), a conductive wire (1304) and a capacitor (1305), wherein the top of the conductive sheet (1301) is threadedly engaged with the fastening screw (1302), and the connecting sheet (1303) is welded and fixed to the rear end of the conductive sheet (1301), conductive wires (1304) are connected between adjacent connecting sheets (1303), and a capacitor (1305) is provided in the middle of the conductive wire (1304).

2. A photovoltaic junction box transmission device according to claim 1, characterized in that: The bottom of the metal base plate (1) is coated with thermal conductive silicone grease (2), and the metal base plate (1) is fixed to the metal frame of the photovoltaic module by means of bolts.

3. A photovoltaic junction box transmission device according to claim 1, characterized in that: A backing plate (3) is fixed to the front end of the top of the metal bottom plate (1) by bolts, and brackets (4) are symmetrically provided on both sides of the backing plate (3).

4. A photovoltaic junction box transmission device according to claim 1, characterized in that: Connecting components (6) are fixed on both sides of the front of the box body (5), and the connecting components (6) include a base (601), a connecting plate (602), an elastic clip (603) and an outer inclined surface (604). The connecting plate (602) is fixed to the bottom end of the base (601), and hollow elastic clips (603) are arranged in an array on the top of the connecting plate (602), and an outer inclined surface (604) is arranged on the outer side of the top of the elastic clip (603).

5. A photovoltaic junction box transmission device according to claim 4, characterized in that: The connection assembly (6) further comprises a threaded opening (605) and a rotary handle (606); the top opening of the base (601) is provided with a threaded opening (605), and the inner side of the threaded opening (605) is threadedly matched with the rotary handle (606).

6. A photovoltaic junction box transmission device according to claim 5, characterized in that: The connecting assembly (6) further comprises a middle hole (607) and an inner conical surface (608); a middle hole (607) is provided through the middle of the rotating handle (606), and the middle hole (607) coincides with the central axis of the elastic clip (603) array; an inner conical surface (608) is provided on the inner side of the bottom of the rotating handle (606), and the inner conical surface (608) is extruded and matched with the outer inclined surface (604).

7. A photovoltaic junction box transmission device according to claim 1, characterized in that: The top opening of the box body (5) is provided with a moisture-proof pad (8), and convex ribs (9) extend inwardly from four corners of the box body (5), and a threaded hole (10) is opened in the middle of the convex ribs (9).

8. A photovoltaic junction box transmission device according to claim 1, characterized in that: A box cover (11) is buckled onto the top of the box body (5), and the box cover (11) is fixed to the threaded hole (10) via screws (12).

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