Three-phase electric energy meter junction box with stable installation

Abstract

The utility model discloses a three-phase electric energy meter junction box with stable installation, which comprises a junction box body and an upper cover installed on the junction box body, a wiring terminal connected with a live wire or a zero wire is installed in the junction box body, the junction box also comprises a lug plate, and the bottom of the upper cover is provided with an installation groove for fixing the lug plate. The wiring piece comprises a connecting end and a wiring end, a wire is fixed on the wiring end in advance, a wire fixing groove is further formed in the upper cover, one side of the wire fixing groove is communicated with the mounting groove, the other side of the wire fixing groove penetrates through the top of the upper cover, the wiring end is inserted into the wire fixing groove in the grooving direction of the wire fixing groove, and the connecting end is inserted into the mounting groove in the grooving direction of the mounting groove. The wire is fixed on one side of the wiring end, so that an operator can press the connecting end to install the wiring sheet, the stability of the connection between the wire and the wiring end is not influenced, and meanwhile, the wire is inserted and fixed from the bottom to the top, so that the inconvenience of wiring operation after the upper cover and the wiring box body are assembled is avoided.

Description

Technical Field

[0001] This application relates to the technical field of junction boxes for electricity meters, and in particular to a stable three-phase electricity meter junction box. Background Technology

[0002] As an important component of power metering equipment, the junction box of the electricity meter has the main function of realizing a stable connection between the electricity meter and the external circuit. With the development of the power system and the diversification of electricity demand, higher requirements are placed on the installation stability, wiring convenience and structural reliability of the junction box.

[0003] As attached Figure 1 As shown, the junction box of the existing energy meter typically includes a junction box body 1 and an upper cover 2 fixed to the junction box body. The junction box body 1 is provided with terminals 11 for connecting the live wire and the neutral wire. After the upper cover 2 is fixedly connected to the junction box body 1, the top of the upper cover 2 and the top of the junction box body 1 enclose each other to form a wiring cavity 3. A wire fixing groove 12 is provided on one side of the junction box body 1 located in the wiring cavity 3. A wiring piece 4 is provided in the wire fixing groove 12. The wiring piece 4 includes a terminal 42 and a connecting end 41. The connecting end 41 of the wiring piece 4 is embedded in the wire fixing groove 12. The terminal 42 of the wiring piece 4 is used to connect with a wire, and the wire is used to connect with the circuit board inside the energy meter.

[0004] However, during the actual installation of the connector 4, if the operator fixes the wire to the connector 42 in advance, and then holds the connector 42 so that the connecting end 41 is inserted into the wire mounting groove 12, and the operator needs to press the connector 42 into the wire mounting groove 12, it is easy to press the connection point between the wire and the connector 4 when pressing the connector 4. This may cause damage to the connection point between the wire and the connector 4 due to the installation of the connector 4. If the operator first inserts the connecting end 41 of the connector 4 into the wire mounting groove 2 and then connects the connector 42 to the wire, it is not convenient for the operator to make connections because the connector 4 is small and is located in the wiring cavity 3, which increases the difficulty of construction and time cost. Summary of the Invention

[0005] To facilitate more stable wiring within the junction box of a three-phase energy meter, a stable three-phase energy meter junction box is provided.

[0006] The above-mentioned objective of this application is achieved through the following technical solution:

[0007] A stable three-phase electricity meter junction box includes a junction box body and a top cover mounted on the junction box body. The junction box body has terminals for connecting to the live wire or neutral wire, and also includes connecting pieces. The bottom of the top cover has a mounting groove for fixing the connecting pieces. The connecting pieces include a connecting end and a connecting end. A wire is pre-fixed on the connecting end. The top cover also has a wire-fixing groove. One side of the wire-fixing groove is connected to the mounting groove, and the other side of the wire-fixing groove extends to the top of the top cover. The connecting end is inserted into the wire-fixing groove along the groove direction, and the connecting end is inserted into the mounting groove along the groove direction and connected to the top cover.

[0008] By adopting the above technical solution, the connector is placed inside the top cover. The operator pre-fixes the wire to the connector terminal, then inserts the terminal into the wire fixing groove. The wire on the terminal passes through the mounting groove and the wire fixing groove in sequence, and finally emerges from the top of the top cover. The connection end is inserted and fixed in the mounting groove. Since the wire is fixed on one side of the terminal, the operator can press the connection end to install the connector without affecting the stability of the connection between the wire and the terminal. This avoids the inconvenience of embedding the connection end first and then connecting the wire in the traditional method, and also reduces the risk of damaging the wire connection due to pressing the terminal. It reduces the installation difficulty and time cost, making the wiring inside the three-phase energy meter junction box more stable and convenient.

[0009] Optionally, the walls of the wire-fixing groove all face towards the connection point between the wire and the terminal.

[0010] By adopting the above technical solution, conventional wires are connected to the connectors, and heat shrink tubing needs to be added at the connection point to ensure connection stability. This application effectively limits the swing amplitude at the connection point of the wire and the connector by forming a covering constraint on the connection part of the wire and the connector, making it more difficult for the wire to shift or loosen when under force, thereby enhancing the connection stability between the wire and the connector and reducing the risk of poor contact or open circuit caused by loosening.

[0011] Optionally, the terminal block and the wire are fixedly welded, and a heat insulation port is provided at the connection point between the connection end and the terminal block. A through heat insulation hole is opened on the connection end, and the heat insulation hole is located on the side close to the heat insulation port.

[0012] By adopting the above technical solutions, the design of the heat insulation holes and heat insulation openings effectively limits the loss of heat to the connection end during the soldering of wires and terminals, reduces the conduction of heat between the terminals, helps to maintain the temperature stability of the soldering area, reduces the occurrence of cold solder joints and missing solder joints during the soldering process, and further improves the reliability and stability of the connection between the wires and terminals.

[0013] Optionally, the number of heat insulation ports is two, with the two heat insulation ports located on both sides of the wiring terminal, and the opening shapes of the two heat insulation ports are different.

[0014] By adopting the above technical solution, the different opening shapes of the two heat insulation ports serve as a guide mark. Operators can easily determine which side is used to fix the welding wire by observing the position of the heat insulation ports with different shapes, thereby quickly locating the welding position of the wire, reducing the time wasted in finding or confirming the position, and reducing the need for reassembly or repair due to improper operation.

[0015] Optionally, the connecting end has a threaded hole for fixing the connecting end on the side away from the wiring end, and the axis of the threaded hole along the direction of insertion of the wiring piece into the mounting groove does not coincide with the axis of the heat insulation hole.

[0016] By adopting the above technical solution, the design of the heat insulation hole not only has a heat insulation function, but also serves as a foolproof mark during installation. By observing the position of the heat insulation hole relative to the threaded hole, the operator can easily identify the correct orientation of the threaded hole, reducing the need for readjustment or disassembly due to incorrect threaded hole orientation, thereby saving assembly time and costs.

[0017] Optionally, the junction box body and the top cover form a wiring cavity, and the top of the top cover is provided with a clearance opening on the side facing the wiring cavity. One side of the clearance opening is connected to the wiring cavity, and the other side of the clearance opening is connected to the wire fixing groove.

[0018] By adopting the above technical solution, the design of the clearance port allows the wires to enter the wiring cavity more smoothly during installation. Due to the connectivity between the clearance port, the wiring cavity, and the wire fixing groove, the wires can be arranged more easily according to the predetermined path, making the connection between the wires and the circuit board more stable and reliable.

[0019] Optionally, the bottom of the top cover is provided with a connector, one end of the connector is provided with a notch, and the end of the connector away from the notch is provided with a fixing hole. The bottom of the top cover is also provided with a first fastening bolt and a second fastening bolt. The first fastening bolt passes through the notch and the top cover in sequence, and is threadedly connected to the junction box body and the terminal block respectively. The second fastening bolt passes through the fixing hole and the threaded hole in sequence and is threadedly connected to the top cover.

[0020] By adopting the above technical solution, in the traditional disassembly method, the top cover and the connector often need to be removed at the same time, which increases the complexity of the operation. In this design, since the connector is fixed to the top cover through the notch, the top cover can be easily removed by simply removing the first fastening bolt corresponding to the notch. The connector is still connected to the top cover by the second fastening bolt, which further simplifies the disassembly process and improves the operation efficiency.

[0021] Optionally, the notch is configured as a half-waist hole.

[0022] By adopting the above technical solution, the design of the half-hole makes the installation and disassembly of the first fastening bolt smoother. The bolt head can be easily aligned with the half-hole and pass through, reducing the alignment time during installation. At the same time, during disassembly, due to the gap fit between the bolt and the half-hole, the bolt is easier to unscrew, further simplifying the disassembly process.

[0023] Optionally, the fixing hole is configured as an oblong hole.

[0024] By adopting the above technical solution, the design of the waist-shaped hole allows the connector to slide freely on the second fastening bolt, thereby adjusting the relative position between the top cover and the junction box body according to actual needs. Under different models and sizes, the top cover can achieve a precise and firm connection with the junction box body through the first fastening bolt, improving the product's adaptability and compatibility.

[0025] Optionally, the junction box body has a waterproof groove on the side facing the top cover, and a waterproof strip embedded in the waterproof groove is fixed on the side of the top cover facing the junction box body.

[0026] By adopting the above technical solution, when the top cover is fixed on the junction box body, the waterproof strip is embedded in the waterproof groove, which increases the sealing performance between the junction box body and the top cover, reduces the risk of water seeping into the junction box body from the connection between the junction box body and the top cover, and improves the safety performance of the electricity meter junction box.

[0027] In summary, this application has at least the following beneficial effects:

[0028] 1. The wire is fixed on one side of the terminal block, so the operator can press the terminal block to install the connector without affecting the stability of the connection between the wire and the terminal block. This avoids the inconvenience of embedding the terminal block first and then connecting the wire in the traditional method, and also reduces the risk of damaging the wire connection due to pressing the terminal block.

[0029] 2. The design of the heat insulation holes and heat insulation openings reduces heat conduction between the terminals and the connection point during soldering of wires and terminals, reducing issues such as cold solder joints and missing solder joints during the soldering process, and further improving the reliability and stability of the connection between the wires and the terminals. Attached image description:

[0030] Figure 1 This is a cross-sectional view of the junction box of a three-phase energy meter in the prior art;

[0031] Figure 2 A cross-sectional view of a stable three-phase energy meter junction box;

[0032] Figure 3 An exploded view of the junction box body and its top cover;

[0033] Figure 4 This is a sectional view of the top cover;

[0034] Figure 5 An exploded view of a junction box for a stable installation of a three-phase energy meter;

[0035] Figure 6 This is a schematic diagram showing the positions of the connector, the terminal block, and the junction box body.

[0036] Reference numerals: 1. Junction box body; 11. Outer shell; 12. Terminal block; 13. Mounting position; 14. Snap-fit ​​block; 15. Waterproof groove; 2. Top cover; 21. Connector; 211. Notch; 2111. Semi-circular hole; 212. Fixing hole; 2121. Oblong hole; 213. First fastening bolt; 214. Second fastening bolt; 22. Mounting groove; 23. Wire fixing groove; 24. Clearance opening; 25. Snap-fit ​​groove; 26. Circuit board assembly; 27. Fixing groove; 28. Waterproof strip; 3. Wiring cavity; 4. Wiring piece; 41. Connecting end; 411. Threaded hole; 412. Heat insulation hole; 413. Heat insulation port; 42. Terminal block. Detailed implementation method:

[0037] The following section provides a more detailed description, in conjunction with the accompanying diagrams:

[0038] As attached Figure 2 As shown, a stable three-phase energy meter junction box includes a junction box body 1 and a top cover 2.

[0039] The junction box body 1 includes an outer shell 11 and terminals 12 disposed inside the outer shell 11. The outer shell 11 may be made of high-temperature resistant insulating material. Three sets of terminals 12 are disposed inside the outer shell 11, with two terminals 12 in each set. Three sets of mounting positions 13 penetrating the outer shell 11 are also disposed at the bottom of the outer shell 11, with two mounting positions 13 in each set. The terminals 12 are made of copper and nickel-plated to improve conductivity and corrosion resistance. The two terminals 12 in each set pass through the bottom and top of the two mounting positions 13 in the same set, respectively. The two terminals 12 in each set are connected to the live wire and neutral wire in the circuit, respectively. The terminals 12 are fixed in the preset mounting positions 13 inside the outer shell 11 by fastening screws to ensure their stable position and facilitate wire connection.

[0040] The top cover 2 is located on one side of the top of the junction box body 1. The top of the junction box body 1 and the top cover 2 enclose a wiring cavity 3. A circuit board assembly 26 is installed on the top of the side of the top cover 2 facing away from the wiring cavity 3. The top of the circuit board assembly 26 is electrically connected to the parts inside the junction box body 1. Multiple bolts are provided at the bottom of the circuit board assembly 26. A fixing groove 27 is also opened at the bottom of the side of the top cover 2 facing away from the wiring cavity 3. The fixing groove 27 and the side wall of the junction box body 1 enclose a mounting cavity 5. Multiple bolts for fastening the live wire and neutral wire are provided on the side wall of the junction box body 1 located in the mounting cavity 5. The mounting cavity 5 facilitates the corresponding operations when disassembling and wiring the circuit board assembly 26.

[0041] As attached Figure 3 and attached Figure 4 As shown, a connector 4 is provided inside the upper cover 2, and a mounting groove 22 for fixing the connector 4 is provided at the bottom of the upper cover 2. The connector 4 includes a connecting end 41 and a connector 42 fixed above the connecting end 41. The connecting end 41 is rectangular in shape. The connecting end 41 is inserted into the mounting groove 22 along the slotting direction of the mounting groove 22 and is connected to the upper cover 2. The shape of the connecting end 41 matches the cross-sectional shape of the mounting groove 22 to ensure that the connecting end 41 can be stably embedded and positioned.

[0042] A wire is pre-fixed on the terminal 42. The wire can be copper or aluminum. The wire is firmly connected to the terminal 42 by welding. The wire is used to connect to the circuit board inside the electricity meter. The terminal 42 is designed to be flat and rectangular, which is convenient for operators to hold and operate.

[0043] Heat insulation ports 413 are provided at the connection points of the two side walls of the connector 41 and the terminal 42. There are two heat insulation ports 413, which are located on both sides of the terminal 42. The opening shapes of the two heat insulation ports 413 are different. The design of the heat insulation ports 413 with different shapes serves as a guide mark. By observing the position of the heat insulation ports 413 with different shapes, the operator can easily determine which side is used to fix the welding wire, and thus quickly locate the position for welding the wire.

[0044] A through-hole 412 is also provided on the connection end 41, and the 412 is located on the side close to the 413. This reduces the connection thickness between the hole wall of the 412 and the inner wall of the 413. When the wire is soldered to the terminal 42, the heat conduction between the terminal 42 and the connection end 41 is reduced, and the soldering process is reduced, such as incomplete soldering and missing soldering, which further improves the reliability and stability of the connection between the wire and the terminal 42.

[0045] The connecting end 41 has a threaded hole 411 for fixing the connecting end 41 on the side away from the terminal 42. The projection of the axis of the threaded hole 411 along the direction of insertion of the terminal 4 into the mounting groove 22 does not coincide with the axis of the heat insulation hole 412. The design of the heat insulation hole 412 not only has a heat insulation function, but also serves as a foolproof mark during installation. By observing the position of the heat insulation hole 412 relative to the threaded hole 411, the operator can easily identify the correct orientation of the threaded hole 411.

[0046] The upper cover 2 also has a wire fixing groove 23. One side of the wire fixing groove 23 is connected to the mounting groove 22, and the other side of the wire fixing groove 23 extends to the top of the upper cover 2. The terminal 42 is inserted into the wire fixing groove 23 along the groove direction of the wire fixing groove 23. The groove walls of the wire fixing groove 23 all move towards the connection point of the wire and the terminal 42, forming a gradually narrowing guide channel. When a conventional wire is connected to the terminal 4, a heat shrink tube needs to be added at the connection point to ensure the connection stability. Now, by forming a covering constraint on the connection part of the wire and the terminal 42, the swing amplitude of the connection point of the wire and the terminal 41 is effectively limited, making it more difficult for the wire to shift or loosen when under force, thereby enhancing the connection stability between the wire and the terminal 4.

[0047] The operator first fixes the wire to the terminal 42 of the connector 4, then inserts the terminal 42 into the wire fixing groove 23. The wire on the terminal 42 passes through the mounting groove 22 and the wire fixing groove 23 in sequence, and finally emerges from the top of the cover 2. The connecting end 41 is inserted into and fixed in the mounting groove 22. Since the wire is fixed on one side of the terminal 42, the operator can press the connecting end 41 to install the connector 4 without affecting the stability of the connection between the wire and the terminal 42.

[0048] The top of the cover 2 is also provided with a clearance opening 24 on the side facing the wiring cavity 3. One side of the clearance opening 24 is connected to the wiring cavity 3, and the other side of the clearance opening 24 is connected to the wire fixing groove 23. Due to the connectivity between the clearance opening 24 and the wiring cavity 3 and the wire fixing groove 23, the clearance opening 24 is convenient for operators to observe and operate, and will not affect the overall structural strength of the junction box.

[0049] As attached Figure 5 and attached Figure 6As shown, the wall of the fixing groove 27 is also provided with connectors 21. There are three connectors 21 here, each corresponding to one of the three sets of terminals 12. The connectors 21 are plate-shaped structures. One end of the connector 21 is provided with a notch 211, and the end of the connector 21 away from the notch 211 is provided with a fixing hole 212. The bottom of the upper cover 2 is also provided with a first fastening bolt 213 and a second fastening bolt 214. The first fastening bolt 213 passes through the notch 211 and the upper cover 2 in sequence, and is threadedly connected to the junction box body 1 and the terminals 12 respectively, thereby achieving reliable fixation between the upper cover 2 and the junction box body 1. At the same time, the terminals 12 are electrically connected to the connectors 21 through the first fastening bolt 213. The second fastening bolt 214 passes through the fixing hole 212 and the threaded hole 411 in sequence and is threadedly connected to the upper cover 2 to fix the terminal piece 4. At the same time, the connectors 21 are electrically connected to the terminal piece 4 through the second fastening bolt 214.

[0050] The notch 211 is set as a semi-circular hole 2111, which makes the first fastening bolt 213 easier to install and remove. The bolt head can be easily aligned with the semi-circular hole 2111 and pass through, reducing the alignment time during installation. The fixing hole 212 is set as a waist-shaped hole 2121, which allows the connector 21 to slide freely on the second fastening bolt 214. This allows the relative position between the top cover 2 and the junction box body 1 to be adjusted according to actual needs, improving the product's adaptability and compatibility.

[0051] As attached Figure 3 As shown, the top cover 2 has a snap-fit ​​groove 25 on the side facing the junction box body 1, and the junction box body 1 has a snap-fit ​​block 14 embedded in the snap-fit ​​groove 25 on the side facing the top cover 2. The top cover 2 and the junction box body 1 can be quickly positioned and connected through the cooperation of the snap-fit ​​groove 25 and the snap-fit ​​block 14, which improves the assembly efficiency between the two and enhances the stability of the connection, avoiding poor contact problems caused by loosening.

[0052] A waterproof groove 15 is provided on the side of the junction box body 1 facing the upper cover 2. A waterproof strip 28 embedded in the waterproof groove 15 is fixed on the side of the upper cover 2 facing the junction box body 1. When the upper cover 2 is fixed on the junction box body 1, the waterproof strip 28 is embedded in the waterproof groove 15, which increases the sealing performance between the junction box body 1 and the upper cover 2, reduces the risk of water seeping into the junction box body 1 from the connection between the junction box body 1 and the upper cover 2, and improves the safety performance of the electricity meter junction box.

[0053] The working effect of this embodiment is:

[0054] Before installing the top cover 2 and the junction box body 1, the wires are pre-soldered to the terminal 42. The wires of the terminal 42 pass through the mounting groove 22 and the wire fixing groove 23 in sequence, and finally emerge from the top of the top cover 2. The connecting end 41 is inserted and fixed in the mounting groove 22. The second fastening bolt 214 fixes one end of the connector 21 to the terminal piece 4. The first fastening bolt 213 fixes the connector 21, the top cover 2 and the junction box body 1. The terminal 12 and the terminal piece 4 are electrically connected through the first fastening bolt 213, the second fastening bolt 214 and the connector 21.

[0055] Since the wire is fixed on one side of the terminal 42, the operator can press the connection end 41 to install the connector 4 without affecting the stability of the connection between the wire and the terminal 42. This avoids the inconvenience of first embedding the connection end 41 and then connecting the wire in the traditional method, and also reduces the risk of damaging the wire connection due to pressing the terminal 42. This reduces the difficulty and time cost of installation, making the wiring inside the three-phase energy meter junction box more stable and convenient.

[0056] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of protection claimed in this application.

Claims

1. A stable three-phase electricity meter junction box, comprising a junction box body (1) and a top cover (2) mounted on the junction box body (1), wherein the junction box body (1) is provided with a terminal block (12) for connection to the live wire or the neutral wire, characterized in that, It also includes a connector (4). The bottom of the cover (2) is provided with a mounting groove (22) for fixing the connector (4). The connector (4) includes a connecting end (41) and a connector (42). A wire is pre-fixed on the connector (42). A wire fixing groove (23) is also opened in the cover (2). One side of the wire fixing groove (23) is connected to the mounting groove (22), and the other side of the wire fixing groove (23) extends to the top of the cover (2). The connector (42) is inserted into the wire fixing groove (23) along the opening direction of the wire fixing groove (23). The connecting end (41) is inserted into the mounting groove (22) along the opening direction of the mounting groove (22) and is connected to the cover (2).

2. The three-phase energy meter junction box with stable installation according to claim 1, characterized in that, The walls of the wire trough (23) are all close to the connection point between the wire and the terminal (42).

3. A stable three-phase energy meter junction box according to claim 1, characterized in that, The terminal (42) is fixedly welded to the wire. A heat insulation port (413) is provided at the connection point between the terminal (41) and the terminal (42). A through heat insulation hole (412) is opened on the terminal (41), and the heat insulation hole (412) is located on the side close to the heat insulation port (413).

4. A stable three-phase energy meter junction box according to claim 3, characterized in that, There are two heat insulation ports (413), which are located on both sides of the wiring terminal (42) and have different opening shapes.

5. A stable three-phase energy meter junction box according to claim 3, characterized in that, The connecting end (41) has a threaded hole (411) for fixing the connecting end (41) on the side away from the wiring end (42), and the axis of the threaded hole (411) along the direction of insertion of the wiring piece (4) into the mounting groove (22) does not coincide with the axis projection of the heat insulation hole (412).

6. A stable three-phase energy meter junction box according to claim 1, characterized in that, The junction box body (1) and the top cover (2) enclose a wiring cavity (3). The top of the top cover (2) is provided with a clearance opening (24) on the side facing the wiring cavity (3). One side of the clearance opening (24) is connected to the wiring cavity (3), and the other side of the clearance opening (24) is connected to the wire fixing groove (23).

7. A stable three-phase energy meter junction box according to claim 1, characterized in that, The bottom of the top cover (2) is provided with a connector (21), one end of the connector (21) is provided with a notch (211), and the end of the connector (21) away from the notch (211) is provided with a fixing hole (212). The bottom of the top cover (2) is also provided with a first fastening bolt (213) and a second fastening bolt (214). The first fastening bolt (213) passes through the notch (211) and the top cover (2) in sequence, and is threadedly connected to the junction box body (1) and the terminal (12) respectively. The second fastening bolt (214) passes through the fixing hole (212) and the threaded hole (411) in sequence and is threadedly connected to the top cover (2).

8. A stable three-phase energy meter junction box according to claim 7, characterized in that, The notch (211) is set as a half waist hole (2111).

9. A stable three-phase energy meter junction box according to claim 7, characterized in that, The fixing hole (212) is configured as an oblong hole (2121).

10. A stable three-phase energy meter junction box according to claim 1, characterized in that, The junction box body (1) has a waterproof groove (15) on the side facing the top cover (2), and a waterproof strip (28) embedded in the waterproof groove (15) is fixed on the side of the top cover (2) facing the junction box body (1).

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