Electric energy metering junction box

Abstract

The utility model discloses an electric energy metering junction box, which comprises a base, a conducting bar and an upper cover, the base and the upper cover are connected and form an inner cavity, the conducting bar is arranged in the inner cavity, a wiring structure is arranged on the conducting bar, and a connecting sheet connected with the conducting bar is arranged at the upper part of the upper cover; the conducting bar is integrally provided with a power connection part protruding upwards, the position, corresponding to the power connection part, of the upper cover is provided with a hollowed-out part, the power connection part extends to the hollowed-out part and is fixedly connected with the connecting piece through a connecting bolt, and the upper end of the power connection part is provided with a power connection face suitable for making contact with the lower surface of the connecting piece; the electric energy metering junction box is reasonable in structure arrangement, can reduce electric energy loss, improves electric conduction performance, and has strong practicality.

Description

Technical Field

[0001] This utility model belongs to the field of power junction boxes, specifically relating to an electricity metering junction box. Background Technology

[0002] The function of an energy metering junction box is to connect the secondary wires from the current transformer in series and parallel through the terminal blocks of the junction box, and finally connect them to the terminal blocks of the energy meter. This wiring method is suitable for single-phase lighting and three-phase active and reactive energy metering at various voltage levels. In an existing energy metering junction box (such as the terminal block in patent document CN211017441U), the electrical connection between the connecting piece and the conductive busbar is achieved through a conductive bolt. Specifically, the upper end of the conductive bolt connects to the connecting piece, and the lower end connects to the conductive busbar. In this design, the introduction of the conductive bolt increases the number of connection points in the circuit (there is one connection point between the connecting piece and the conductive bolt, and another connection point between the conductive bolt and the conductive busbar). In electrical connections, each additional connection point introduces a certain contact resistance, which leads to increased energy loss. Specifically, when current passes through these connection points, heat is generated due to the contact resistance, resulting in additional energy loss. Moreover, the limited contact area between the conductive bolt, the conductive busbar, and the connecting piece can easily affect the overall conductivity. Utility Model Content

[0003] In response to this, the present invention provides an energy metering junction box that can reduce energy loss and has good conductivity.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] This utility model provides an electricity metering junction box, including a base, a conductive bar, and a top cover; the base and the top cover are connected and form an inner cavity, the conductive bar is installed in the inner cavity, and the conductive bar is provided with a wiring structure; the upper part of the top cover is provided with a connecting piece connected to the conductive bar, the conductive bar is integrally provided with an upwardly protruding contact part, the top cover is provided with a hollow part corresponding to the contact part, the contact part extends to the hollow part and is fixedly connected to the connecting piece by a connecting bolt, and the upper end of the contact part has a contact surface suitable for contacting the lower surface of the connecting piece.

[0006] In some embodiments, an upwardly protruding block is provided in the inner cavity at a position corresponding to the power receiving part, and a nut is installed between the upper end of the protruding block and the power receiving part for limiting. The connecting bolt cooperates with the nut, and the power receiving part and the connecting piece are provided with clearance holes for the connecting bolt to pass through.

[0007] In some embodiments, the upper end of the protrusion is provided with a groove, and the nut is embedded in the groove.

[0008] In some embodiments, the conductive busbar is a conductive sheet, and the contact portion is formed by bending the corresponding part of the conductive sheet upward.

[0009] In some embodiments, the wiring structure includes terminals disposed on a conductive bar and wiring screws connected to the terminals, and the upper cover is provided with an operating hole at a position corresponding to the wiring screw.

[0010] In some embodiments, the upper surface of the cover is formed with an annular protrusion surrounding the operating hole.

[0011] The positive effects of this utility model are as follows: This utility model optimizes the structure by providing a hollow part on the upper cover to allow the electrical contact part to extend out, and by tightening the connecting bolts to fix the electrical contact part and the connecting piece, so that the electrical contact surface on the electrical contact part and the lower surface of the connecting piece directly contact each other to form a reliable electrical connection. Compared with the traditional method of transitionally connecting the conductive busbar and the connecting piece by conductive bolts, the connection method in this utility model can reduce the number of circuit connection points, thereby reducing power loss and ensuring good conductivity. Attached Figure Description

[0012] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art are briefly introduced below. In the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0013] Figure 1 This is a perspective view of the power metering junction box in this utility model;

[0014] Figure 2 for Figure 1 Exploded view of the power metering junction box shown;

[0015] Figure 3 for Figure 2 A magnified view of a portion of point A in the middle;

[0016] Figure 4 for Figure 2 A magnified view of a portion of point B in the middle.

[0017] The reference numerals in the figure are as follows: 1. Base; 11. Inner cavity; 12. Protrusion; 13. Groove; 2. Conductive bar; 21. Electrical contact part; 22. Electrical contact surface; 3. Top cover; 31. Hollowed-out part; 32. Operating hole; 33. Annular protrusion; 4. Terminal; 5. Wiring screw; 6. Connecting piece; 61. Connecting bolt; 62. Nut. Detailed Implementation

[0018] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0019] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.

[0020] The structure of the power metering junction box in this embodiment of the utility model is as follows: Figures 1 to 4 As shown, it includes a base 1, a conductive busbar 2, and a top cover 3. The base 1 is connected to the top cover 3 and forms an inner cavity 11. The conductive busbar 2 is installed in the inner cavity 11 and has a wiring structure for connecting to an external wire, thus electrically connecting the external wire to the conductive busbar 2. The top cover 3 has a connecting piece 6 connected to the conductive busbar 2. The conductive busbar 2 has an integrally formed upwardly protruding contact part 21. The top cover 3 has a hollow part 31 corresponding to the contact part 21. The contact part 21 extends to the hollow part 31 and is fixedly connected to the connecting piece 6 by a connecting bolt 61. The upper end of the contact part 21 has a contact surface 22 suitable for contacting the lower surface of the connecting piece 6. In use, the same connection... When the connecting piece 6 is connected to two conductive bars 2 simultaneously, an electrical connection is achieved between the two conductive bars 2. When the connecting piece 6 is connected to only one conductive bar 2 or not connected to either of the two conductive bars 2, the electrical connection between the two conductive bars 2 is broken. By providing a hollow part 31 on the upper cover 3 to allow the contact part 21 to extend out, and by tightening the connecting bolt 61, the contact part 21 and the connecting piece 6 are fixedly connected. Thus, the contact surface 22 on the contact part 21 and the lower surface of the connecting piece 6 are in direct contact (specifically, surface contact) to form a reliable electrical connection. Compared with the traditional method of transitionally connecting the conductive bar 2 and the connecting piece 6 through conductive bolts, the connection method in this embodiment can reduce the number of circuit connection points, thereby reducing power loss and ensuring good conductivity.

[0021] like Figure 3 As shown, an upwardly protruding block 12 is provided in the inner cavity 11 at a position corresponding to the power receiving part 21. A nut 62 is installed between the upper end of the protruding block 12 and the power receiving part 21 for limiting. The connecting bolt 61 cooperates with the nut 62. The power receiving part 21 and the connecting piece 6 are provided with clearance holes for the connecting bolt 61 to pass through. The cooperation between the connecting bolt 61 and the nut 62 can ensure a reliable connection between the power receiving part 21 and the connecting piece 6. Moreover, the protruding block 12 can limit the nut 62 and support the power receiving part 21.

[0022] To improve the positioning reliability of nut 62, a groove 13 is provided at the upper end of protrusion 12. Nut 62 is embedded in groove 13, and the power contact part 21 can form a blocking limit on nut 62 from the top, which can prevent nut 62 from falling off.

[0023] In this embodiment, the conductive busbar 2 is preferably made of a conductive sheet, and the electrical receiving part 21 is formed by bending the corresponding part of the conductive sheet upward. This structure is simple, easy to process, saves materials, and can reduce production costs.

[0024] Combination Figure 1 , Figure 2 and Figure 4 As shown, the wiring structure includes a terminal 4 on the conductive busbar 2 and a wiring screw 5 connected to the terminal 4. The upper cover 3 has an operating hole 32 at the position corresponding to the wiring screw 5. When wiring, the external wire is inserted into the terminal 4, and a screwdriver is inserted through the operating hole 32 to tighten the wiring screw 5, thereby pressing the external wire onto the conductive busbar 2 and realizing the electrical connection between the external wire and the conductive busbar 2.

[0025] like Figure 1 and Figure 2 As shown, the upper surface of the upper cover 3 is formed with an annular protrusion 33 surrounding the operation hole 32. The presence of the annular protrusion 33 allows the wiring screw 5 to be better housed within it, preventing the upper end of the wiring screw 5 from protruding from the upper cover 3 and being exposed, thereby reducing the risk of short circuit and electric shock caused by accidental contact and enhancing protection.

[0026] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all embodiments here. However, these obvious variations or modifications derived from the essential spirit of this utility model still fall within the protection scope of this utility model.

Claims

1. An electricity metering junction box, comprising a base (1), a conductive busbar (2), and a top cover (3); the base (1) is connected to the top cover (3) and forms an inner cavity, the conductive busbar (2) is installed in the inner cavity (11), the conductive busbar (2) is provided with a wiring structure, and the upper part of the top cover (3) is provided with a connecting piece (6) connected to the conductive busbar (2); characterized in that, The conductive busbar (2) is integrally provided with an upwardly protruding contact part (21), and the upper cover (3) is provided with a hollow part (31) at the position corresponding to the contact part (21). The contact part (21) extends to the hollow part (31) and is fixedly connected to the connecting piece (6) by a connecting bolt (61). The upper end of the contact part (21) has a contact surface (22) suitable for contacting the lower surface of the connecting piece (6).

2. The power metering junction box according to claim 1, characterized in that, The inner cavity (11) is provided with an upward protrusion block (12) corresponding to the position of the power receiving part (21). A nut (62) is installed between the upper end of the protrusion block (12) and the power receiving part (21). The connecting bolt (61) cooperates with the nut (62). The power receiving part (21) and the connecting piece (6) are provided with clearance holes for the connecting bolt (61) to pass through.

3. The power metering junction box according to claim 2, characterized in that, The upper end of the protrusion (12) is provided with a groove (13), and the nut (62) is embedded in the groove (13).

4. The power metering junction box according to claim 1, characterized in that, The conductive busbar (2) is a conductive sheet, and the electrical receiving part (21) is formed by bending the corresponding part of the conductive sheet upward.

5. The power metering junction box according to claim 4, characterized in that, The wiring structure includes a terminal (4) on the conductive bar (2) and a wiring screw (5) connected to the terminal (4). An operating hole (32) is provided on the upper cover (3) at the position corresponding to the wiring screw (5).

6. The power metering junction box according to claim 5, characterized in that, The upper surface of the cover (3) is formed with an annular protrusion (33) surrounding the operating hole (32).

Images