Electric power wiring connection structure and electric power meter thereof

Abstract

The utility model relates to an electric power wiring connection structure and an electric power meter thereof, the electric power wiring connection structure comprises a first connection base material, a second connection base material and a welding rivet end connected between the first connection base material and the second connection base material, the first connection base material is provided with a first main body part and a connection hole penetrating through the first main body part; the second connecting base material is provided with a second main body part and a rivet head which protrudes out of the other side of the second main body part through extrusion from one side of the second main body part; the welding and riveting end comprises the riveting head and the connecting hole which are mutually inserted and riveted, and further comprises solidification welding flux which is located between the second connecting base metal and the second connecting base metal and surrounds the periphery of the riveting head. The solidified welding flux is formed by solidifying the self-welding slurry on the peripheries of the connecting hole of the first connecting base material and the riveting head of the second connecting base material, and the first connecting base material and the second connecting base material are tightly connected together through the welding and riveting end. Through the arrangement, the welding and riveting performance can be improved, and the connection resistance between the first connection base material and the second connection base material is better reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of electric power wiring connection structure for instrument and meter, especially the electric power wiring connection structure suitable for electric energy transmission field and its electric power meter. BACKGROUND

[0002] Mutual inductors or shunts are widely used in electronic and automation control fields, such as communication systems, measurement or metering components. Therefore, the connection structure between the mutual inductor or shunt and the terminal button has a broad market worldwide, and according to incomplete statistics, the annual sales of such products worldwide exceed 50 billion US dollars.

[0003] In the prior art, there are several commonly used connection methods for terminal buttons, one of which is to provide a step on one end of the terminal button, and a screw hole is provided on the step. The primary current line of the mutual inductor is directly fixed on the step by a screw. This structure requires that the step plane and the contact surface of the primary current line be flat and in close contact, and the screw must be tightened in place to ensure a small contact resistance. Batch production consistency is poor. The contact resistance of this connection structure is between 40-60 micro-ohms, the self-power consumption is large, and the electric power energy is wasted. Another method is to connect electrically by riveting process, such as the technical solutions described in Chinese invention patents No. 201210152376.5 and No. 20141036819.8. However, there is always a gap at the connection, which may be oxidized in the air, and the thermal expansion and contraction over a long period of time may affect the contact resistance. For example, the technical solution described in Utility Model Patent No. 201921390728.4 adds a welding sheet or a welding ring, and further improves the deficiencies of the above technical solutions by welding and then riveting. However, there is a certain production time difference between the elements that need to be welded and the welding process, which may be oxidized or contaminated, thereby affecting the welding performance.

[0004] Therefore, how to optimize the electrical connection between the mutual inductor or shunt and the electric power wiring is a problem that needs to be researched and solved by those skilled in the art. Utility Model Content

[0005] The utility model aims to provide an electric power wiring connection structure and an electric power meter that better realize zero-resistance electrical connection.

[0006] To achieve the above technical objectives, this utility model adopts the following technical approach: an electrical wiring connection structure, comprising a first connecting base material, a second connecting base material, and a welding and riveting end connected between the first connecting base material and the second connecting base material. The first connecting base material has a first main body portion and a connecting hole penetrating the first main body portion. The second connecting base material has a second main body portion and a rivet head protruding from one side of the second main body portion by extrusion onto the other side. The welding and riveting end includes the rivet head and the connecting hole that are inserted into and riveted together. The welding and riveting end also includes solidified solder located between the second connecting base material and the second connecting base material and surrounding the rivet head. The welding and riveting end tightly connects the first connecting base material and the second connecting base material together.

[0007] As a further improvement of this utility model, the solidified solder is formed by the solidification of the solder slurry around the connection hole of the first connecting base material and the rivet head of the second connecting base material.

[0008] As a further improvement of this utility model, the cross-section of the rivet head is square or racetrack-shaped.

[0009] As a further improvement of this utility model, the rivet head is hollowed out at the top and bottom.

[0010] As a further improvement of this utility model, the first base material is provided with a countersunk hole located at the top of the connecting hole, and the rivet head of the welding and riveting end is provided with a column portion located in the connecting hole and a platform portion located at the top of the column portion and received in the countersunk hole.

[0011] As a further improvement of this utility model, the second connecting base material is a conductive material: copper or brass.

[0012] As a further improvement of this utility model, the power wiring connection structure is also provided with a relay, a voltage transformer, a current transformer and / or a shunt, and the voltage transformer, current transformer and / or shunt are connected to the relay through the welding end.

[0013] As a further improvement of this utility model, a current transformer is sleeved on the first connecting base material or the second connecting base material, and the first connecting base material and the second connecting base material further extend a flat terminal away from the welding end.

[0014] As a further improvement of this utility model, the power wiring connection structure includes a relay, a first terminal, and a second terminal. The relay has a first arm and a second arm protruding outward. A shunt is provided on the first arm. The first arm is electrically connected to the first terminal through the welding end, and the second arm is electrically connected to the second terminal through another welding end.

[0015] To achieve the above technical objectives, the present invention may also adopt the following technical approach: an electric meter, including a meter housing, wherein a metering device, a metering display device, and the above-mentioned power wiring connection structure are provided inside the meter housing.

[0016] Compared to existing technologies, this invention features a first connecting base material with a connecting hole, and a second connecting base material with a rivet head that protrudes to the other side through extrusion. The welding and riveting end includes the rivet head, the connecting hole, and solidified solder located between the second connecting base material and surrounding the rivet head, which are interlocked and riveted together. This design further improves welding and riveting performance, enabling better zero-resistance contact between the first and second connecting base materials, improving electrical transmission efficiency and safety. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the first connecting base material and the second connecting base material in the first embodiment of this utility model;

[0018] Figure 2 yes Figure 1 A schematic diagram of the structure after applying welding slurry to the second connecting base material;

[0019] Figure 3 This is a schematic diagram of the structure after the first connecting base material and the second connecting base material are connected in the first embodiment of this utility model;

[0020] Figure 4 yes Figure 3 A cross-sectional view of the first connecting base material and the second connecting base material after they are connected;

[0021] Figure 5 yes Figure 3 A structural exploded view of the structure after the first connecting base material and the second connecting base material are connected;

[0022] Figure 6 This is a schematic diagram of the structure of the first connecting base material and the second connecting base material in the second embodiment of this utility model;

[0023] Figure 7 yes Figure 6 A schematic diagram of the structure after applying welding slurry to the second connecting base material;

[0024] Figure 8 This is a schematic diagram of the structure after the first connecting base material and the second connecting base material are connected in the second embodiment of this utility model;

[0025] Figure 9 yes Figure 8 A cross-sectional view of the first connecting base material and the second connecting base material after they are connected;

[0026] Figure 10 yes Figure 8 A structural exploded view of the structure after the first connecting base material and the second connecting base material are connected;

[0027] Figure 11 This is a structural schematic diagram of the third embodiment of the present invention;

[0028] Figure 12 This is a structural schematic diagram of the fourth embodiment of the present invention;

[0029] Figure 13 This is a structural schematic diagram of the fifth embodiment of the present invention.

[0030] Figure label:

[0031] Power wiring connection structure 100, 100' First connection base material 1, 1'

[0032] First main body 10 connecting holes 11, 11'

[0033] Countersunk holes 12, 12' Second connecting base material 2, 2'

[0034] Second main body 20, 20' Rivet heads 21, 21'

[0035] Column 211, 211' Platform 212, 212'

[0036] Hollowed-out sections 213, 213' weld paste 31

[0037] Solidified solder 32, riveting part 4, 4'

[0038] Power wiring connection structure 200 Relay 52

[0039] Connection 521 shunt 51

[0040] Connection 511, Welding / Riveting End 510

[0041] Voltage transformer 53 connection 531

[0042] 530 welding and riveting end, current transformer 54

[0043] Connection 541, welding / riveting end 540

[0044] Power wiring connection structure 300 First connection base material 301

[0045] Second connecting base material 302 Current transformer 61

[0046] Terminal 62, welding / riveting terminal 620

[0047] Countersunk Hole 312

[0048] 400 power wiring connection structure

[0049] Relay 7 First arm 71

[0050] Shunt 710, welded end 711

[0051] Second arm section 72, welding and riveting end 721

[0052] First terminal 73 Second terminal 74

[0053] Countersunk Hole 412 Detailed Implementation

[0054] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present invention.

[0055] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0056] Technologies and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such technologies and equipment should be considered part of the specification.

[0057] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0058] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0059] Please refer to Figures 1 to 10The diagram shows a schematic representation of the electrical wiring connection structures 100 and 100' of this utility model. Taking the first embodiment as an example, an electrical wiring connection structure 100 includes a first connecting base material 1, a second connecting base material 2, and a welding and riveting end 4 connecting the first connecting base material 1 and the second connecting base material 2. The first connecting base material 1 has a first main body portion 10 and a connecting hole 11 penetrating the first main body portion 10. The second connecting base material 2 has a second main body portion 20 and a rivet head 21 protruding from one side of the second main body portion 20 by extrusion to the other side. The welding and riveting end 4 includes the rivet head 21 and the connecting hole 11 that are inserted and riveted together. The welding and riveting end 4 also includes solidified solder 32 located between the second connecting base material 2 and the second connecting base material 2 and surrounding the rivet head 21. The solidified solder 32 is formed by the solidification of solder 31 around the connecting hole 11 of the first connecting base material 1 and the rivet head 21 of the second connecting base material 2. The welding and riveting end 4 tightly connects the first connecting base material 1 and the second connecting base material 2 together. The solder paste 31 refers to a paste-like liquid tin metal containing flux, also known as solder paste. The electrical wiring connection structure 100 of this utility model uses solder paste 31 or silver-containing solder paste 31 as the connection medium. The solder paste 31 or silver-containing solder paste 31 contains flux, which can remove oxides from the surface of the solder and the base material being soldered, achieving the necessary cleanliness of the metal surface. It prevents re-oxidation of the surface during soldering, reduces the surface tension of the solder, and improves soldering performance. Specifically, the solder paste 31 can be first applied to the soldering area of ​​the second connecting base material 2 using a dispensing machine or coating machine. Then, the first connecting base material 1 to be soldered is assembled. Simultaneously, the solder paste 31 is evenly spread and adhered between the two contact surfaces of the first connecting base material 1 and the second connecting base material 2 while being pressed and riveted. Finally, the solder paste 31 can be melted using methods such as high-frequency heating, laser heating, high-temperature hot air heating, or reflow soldering equipment heating, thereby achieving a seamless connection between the two. In this utility model, the rivet head 21 is integrally extruded from the second connecting base material 2, which can improve the manufacturing efficiency of the second connecting base material 2. After riveting and welding, the welding end 4 can better improve the electrical contact efficiency between the first connecting base material 1 and the second connecting base material 2, and realize zero resistance connection. In terms of power transmission or power detection, it can achieve higher transmission efficiency, detection accuracy and safety of use.

[0060] When the solder paste 31 is a silver-containing tin paste, that is, a solder paste 31 containing elemental silver, the silver-containing solder paste 31 is used as the welding medium. This reduces resistance, allowing for a near-zero-resistance electrical connection between the first connecting base material 1 and the second connecting base material 2. Based on the above preferred method, the elemental silver content in the welding end 4 is 1% to 30%. This setting further reduces resistance and better controls manufacturing costs.

[0061] Please refer to Figures 1 to 5 As shown, in the first embodiment, the cross-section of the riveting head 21 can be in a runway shape. With this setting, the connecting hole 11 on the first connecting base material 1 is also in a runway shape. When the connecting hole 11 and the riveting head 21 are inserted vertically, unnecessary rotational displacement between the connecting hole 11 and the riveting head 21 can be effectively avoided, thereby improving the precision of welding and riveting. Please refer to Figures 6 to 10 As shown, it is a schematic structural view of the second embodiment of the present utility model. The structure of the second embodiment is substantially the same as that of the first embodiment. The differences include that the cross-section of the riveting head 21' can be square. With this setting, the connecting hole 11' on the first connecting base material 1' is also square correspondingly. When the connecting hole 11' and the riveting head 21' are inserted vertically, unnecessary rotational displacement between the two can be effectively avoided, thereby improving the precision of welding and riveting. Of course, in other embodiments, the cross-section of the riveting head 21 can be other shapes as long as it can position the connecting hole 11 of the first connecting base material 1.

[0062] In Figures 1 to 10 As shown in the illustration, the riveting heads 21, 21' are hollowed out up and down to form hollow parts 213, 213'. With this setting, it is convenient for the riveting heads 21, 21' to be extruded from the second main parts 20, 20' of the second connecting base materials 2, 2', and it is also convenient for subsequent riveting with the first connecting base materials 1, 1'. Of course, in other embodiments, the riveting head 21 can also be solid, such as Figure 13 the embodiment shown, as long as riveting can be achieved.

[0063] Refer to Figures 1 to 10 As shown, in a preferred embodiment, the first base material is provided with counterbores 12, 12' at the tops of the connecting holes 11, 11'. The riveting heads 21, 21' of the welding and riveting ends 4, 4' are provided with column parts 211, 211' located in the connecting holes 11, 11 and table parts 212, 212' located at the tops of the column parts 211, 211' and received in the counterbores 12, 12'. With this setting, after the riveting and welding are completed, the tops of the welding and riveting ends 4, 4 are flat. Especially when the first connecting base materials 1, 1' are relatively thick, the design of the counterbores 12, 12 can reduce the thickness of the entire welding and riveting end 4, 4. Another refer to Figure 12 、 13 As shown, the design of the counterbores 312, 412 in the fourth and fifth embodiments is the same as that in the first and second embodiments. Of course, refer to Figure 11 As shown, in other embodiments, if the first connecting base material 1 is relatively thin, the counterbore 12 may not be provided either.

[0064] The second connecting material 2 is copper. This design, with its relatively soft copper, allows the rivet head 21 to be pushed upwards and extruded from the second connecting material 2, preventing cracks or even breakage during extrusion that could affect the resistivity or even safety of the electrical connection. In other embodiments, the second connecting material 2 can also be made of other materials, such as brass.

[0065] Please refer to Figure 11 The diagram shown is a structural schematic of the third embodiment of this utility model. The power wiring connection structure 200 is further equipped with a relay 52, a voltage transformer 53, a current transformer 54, and / or a shunt 51. The voltage transformer 53, current transformer 54, and / or shunt 51 are connected to the relay 52 via welding ends 510, 530, and 540. In the diagram, the voltage transformer 53, current transformer 54, and shunt 51 are present simultaneously. The relay 52 extends outwards with three sheet-like connection points 521. The voltage transformer 53, current transformer 54, and shunt 51 are respectively provided with their own sheet-like connection points 511, 531, and 541. This arrangement enables zero-resistance contact between the relay 52 and the voltage transformer 53, current transformer 54, and shunt 51, greatly improving electrical transmission efficiency and safety. In other embodiments, the voltage transformer 53, the current transformer 54, and the shunt 51 may be selectively connected to the relay 52.

[0066] Please refer to Figure 12 The diagram shown is a structural schematic of the fourth embodiment of this utility model. A current transformer 61 is fitted onto the first connecting base 301 or the second connecting base 302 of the power wiring connection structure 300. Flat terminals 62 extend further from the first connecting base 301 and the second connecting base 302 away from the welding end 620. With this configuration, the terminals 62 equipped with the current transformer 61 can be electrically connected to other electrical meter devices or cables, etc., to achieve corresponding electrical functions, reduce resistance, and improve electrical efficiency and safety.

[0067] Please refer to Figure 13The diagram shown is a structural schematic of the fifth embodiment of this utility model. The power wiring connection structure 400 includes a relay 7, a first terminal 73, and a second terminal 74. The relay 7 has a first arm 71 and a second arm 72 protruding outwards. A shunt 710 is provided on the first arm 71. The first arm 71 is electrically connected to the first terminal 73 through a welding end 711, and the second arm is electrically connected to the second terminal 74 through another welding end 721. With this configuration, the first terminal 73 and the second terminal 74 can be electrically connected to other meter devices or cables to achieve corresponding electrical functions. The welding end 721 can reduce resistance, improve electrical connection efficiency, and enhance safety.

[0068] This utility model also protects an electric meter (not shown), including a meter housing (not shown), a metering device (not shown), a metering display device (not shown), and the aforementioned power wiring connection structures 100, 100', 200, 300, and 400 inside the meter. The power wiring connection structures 100, 100', 200, 300, and 400 inside the electric meter provide a stable connection, reduce resistance, improve the overall safety of the electric meter, and reduce its overall power consumption.

[0069] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "or / and" as used herein includes any and all combinations of one or more of the associated listed items.

[0070] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0071] The directional terms used in the various technical features described in the above embodiments, such as front, back, left, right, up, and down, are used only for the convenience of describing and understanding the various technical features, and do not constitute a limitation on specific directions in the actual use of the technical solution.

[0072] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An electrical wiring connection structure, characterized by: The rivet welding end includes the rivet head and the connecting hole which are inserted and riveted with each other, and further includes the solidified solder which is located between the first connecting base material and the second connecting base material and surrounds the rivet head, and the rivet welding end tightly connects the first connecting base material and the second connecting base material together.

2. An electrical connection structure according to claim 1, wherein: The solidified solder is solidified from the solder paste around the rivet head of the second connecting base material.

3. An electrical connection structure according to claim 1, wherein: The rivet head is square or runway-shaped in cross section.

4. The power connection structure of claim 1, wherein: The rivet head is hollowed out upward and downward.

5. The power connection structure of claim 1, wherein: The first connecting base material is provided with a counterbore on the top of the connecting hole, and the rivet head of the rivet welding end is provided with a column part in the connecting hole and a table part which is accommodated in the counterbore on the top of the column part.

6. An electrical power connection structure according to claim 1, characterized in that: The second connecting base material is made of conductive material, such as red copper or brass.

7. An electrical power connection structure according to claim 1, wherein: The power connection structure is further provided with a relay, a voltage transformer, a current transformer and / or a shunt, and the voltage transformer, the current transformer and / or the shunt are connected with the relay through the rivet welding end.

8. An electrical power connection structure according to claim 1, characterized in that: A current transformer is sleeved on the first connecting base material or the second connecting base material, and the first connecting base material and the second connecting base material are further extended in the direction away from the rivet welding end to have a flat wiring end.

9. The power connection connection structure of claim 1, wherein: The power connection structure includes a relay and a first wiring end and a second wiring end, the relay outwardly protrudes a first arm part and a second arm part, the first arm part is provided with a shunt, the first arm part is electrically connected with the first wiring end through the rivet welding end, and the second arm part is electrically connected with the second wiring part through another rivet welding end.

10. An electric power meter characterized by: The power connection structure includes an instrument shell, the instrument shell is provided with a metering device, a metering display device and a power connection structure according to any one of claims 1 to 9.

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