An electronic electric energy meter and sampling structure capable of resisting magnetic field interference

Abstract

The present invention discloses an electronic electric energy meter and sampling structure capable of resisting magnetic field interference, comprising a shunt sheet and a conductive rod module assembly, wherein the shunt sheet is provided with a first sampling point and a second sampling point, the conductive rod module assembly comprises a conductive rod and a module body, wherein the conductive rods are two and automatically pressed into corresponding mounting positions of the module body, the module body and the shunt sheet are provided with matching guide configurations for automatic assembly of the two, the two conductive rods are respectively electrically connected to the first sampling point and the second sampling point of the shunt sheet to form a first sampling foot and a second sampling foot, and when the electric energy meter is assembled, the end of the conductive rod is automatically assembled and welded with a PCB board to collect signals. The present invention uses the module body as a carrier to realize automatic batch production, thereby reducing labor costs and improving assembly efficiency.

Description

Technical Field

[0001] The invention discloses an electronic electric energy meter capable of resisting magnetic field interference and a sampling structure, which belongs to the technical field of electronic instrument manufacturing according to the International Patent Classification (IPC). Background Art

[0002] With the continuous development and improvement of national power grid technology, the requirements for operating environment are increasing, especially the requirements for anti-magnetic interference of electric energy meters are gradually increasing. Electronic electric energy refers to an electronic instrument equipment, which samples the user's power supply voltage and current in real time, adopts a dedicated electric energy meter integrated circuit, processes the sampled voltage and current signals, multiplies them and converts them into pulse output proportional to the electric energy, and then displays them through a meter or a digital display. The existing scheme usually uses signal lines to weld at the sampling end of the shunt to collect signals, and uses the flexibility of the signal line to reduce the area of ​​interference from the external magnetic field. However, the softness of the signal line increases the manual signal line and PCB soldering process during the assembly process, resulting in extremely high labor costs and extremely low labor efficiency, which is not suitable for modern automated mass production.

[0003] In order to solve this problem, a solution is invented based on the current sampling method to achieve automated mass production of modules. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides an electronic electric energy meter sampling structure that is resistant to magnetic field interference. On the premise of ensuring the function of anti-magnetic interference, automatic production is achieved through modular design, thereby reducing labor costs and improving assembly efficiency.

[0005] To achieve the above object, the present invention is achieved through the following technical solutions:

[0006] A sampling structure of an electronic electric energy meter capable of resisting magnetic field interference, comprising:

[0007] A flow divider having a first sampling point and a second sampling point;

[0008] A conductive rod module assembly, comprising a conductive rod and a module body, wherein the conductive rod is composed of a first conductive rod and a second conductive rod, the two conductive rods are automatically pressed into corresponding mounting positions of the module body, the module body and the shunt sheet are provided with matching guide configurations for automatic assembly of the two, and the two conductive rods are respectively electrically connected to a first sampling point and a second sampling point of the shunt sheet to form a first sampling foot and a second sampling foot;

[0009] The steps of assembling the conductive rod module assembly and the shunt sheet are as follows:

[0010] The conductive rod is first pressed into the corresponding installation position of the module body to form a conductive rod module assembly;

[0011] Then the conductive rod module assembly is installed on the shunt sheet;

[0012] The sampling points of the shunt sheets are electrically connected to the corresponding conductive rods to realize signal sampling.

[0013] Furthermore, the module body and the shunt sheet are fixed by snap fit during assembly.

[0014] Furthermore, the module body is provided with an upper buckle, a lower buckle and limit platforms on the other two sides. When the module body and the shunt plate are installed in place, the upper buckle, the lower buckle and the front plane of the limit platform fix and clamp the shunt plate.

[0015] Furthermore, the module body is provided with a guide positioning hole, and the shunt piece is provided with a corresponding guide positioning column, and the guide positioning column and the guide positioning hole constitute a guide configuration for automatic positioning and assembly of the conductive rod module assembly and the shunt piece.

[0016] Furthermore, the guide positioning hole of the module body is arranged on the limit platform, the entrance of the guide positioning hole is placed on the front plane of the limit platform, the guide positioning hole cooperates with the corresponding guide positioning column to realize the guiding function and cooperates with the limit platform to realize the limit assembly.

[0017] Furthermore, two grooves are provided on one side surface of the upper part of the module body to form the installation position of the conductive rod, and the two grooves are arranged in parallel so that the vertical part of the conductive rod can be clamped and positioned.

[0018] Furthermore, a barrier is provided between the two grooves of the module body, and the barrier extends upward from the top end. The thickness of the barrier is equal to the distance between the two conductive rods. The distance between the conductive rods can be as small as possible to reduce the interference of the power frequency magnetic field.

[0019] Furthermore, the notches of the grooves are snap-fits with a certain elastic expansion, and the gap between the snap-fits is slightly smaller than the diameter of the conductive rod.

[0020] Furthermore, a crimping terminal is provided at one end of the conductive rod, and the conductive rod is bent to form an L shape near the terminal. The bending part of the conductive rod or the crimping terminal abuts against the corresponding limiting surface of the module body to accurately position the vertical end of the conductive rod to facilitate assembly with the PCB board.

[0021] Furthermore, the first sampling point and the second sampling point of the shunt sheet are two sampling bosses, and the side surface of each sampling boss contacts and is welded and fixed to the side surface of the crimping terminal of the conductive rod.

[0022] The present invention also provides an electronic electric energy meter capable of resisting magnetic field interference, comprising the above-mentioned sampling structure, wherein the end of the conductive rod is automatically assembled and welded with the PCB board to collect signals.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The present invention uses the module body as a carrier, and can realize the automatic batch production of the modules of the sampling structure, thereby reducing labor costs and improving assembly efficiency.

[0025] 2. The present invention uses a conductive rod to replace a soft wire, and the conductive rod can be automatically processed and assembled, with low cost and high efficiency.

[0026] 3. In the present invention, the distance between the two conductive rods can be as small as possible to reduce the interference of the power frequency magnetic field and realize the anti-magnetic interference function of the electronic electric energy meter.

[0027] 4. The sampling structure of the present invention can be automatically assembled with the PCB board to improve the assembly efficiency of the electric meter. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the sampling structure of an embodiment of the present invention.

[0029] Figure 2 It is another schematic diagram of the sampling structure of an embodiment of the present invention.

[0030] Figure 3 It is a front view of the sampling structure of an embodiment of the present invention.

[0031] Figure 4 yes Figure 3 Sectional view along A axis.

[0032] Figure 5 It is a schematic diagram of the conductive rod module assembly of the present invention.

[0033] Figure 6 It is a front view of the conductive rod module assembly of the present invention.

[0034] Figure 7 It is a cross-sectional view of the conductive rod assembly of the present invention.

[0035] Figure 8 Schematic diagram of the conductive rod of the present invention.

[0036] Fig. 9 It is a front view of the conductive rod of the present invention.

[0037] Fig.10 It is a schematic diagram of the shunt sheet of the present invention.

[0038] Fig.11 It is a side view of the diverter plate of the present invention.

[0039] Fig.12 It is an exploded view of the sampling structure diagram of the present invention. DETAILED DESCRIPTION

[0040] The present invention will be further described below in conjunction with the accompanying drawings:

[0041] Example: See Figures 1 to 12 A sampling structure of an electronic electric energy meter capable of resisting magnetic field interference comprises a shunt sheet 1 and a conductive rod module assembly 2. The shunt sheet 1 is provided with a first sampling point and a second sampling point. The conductive rod module assembly 2 comprises a conductive rod 21 and a module body 22. The conductive rod 21 is composed of a first conductive rod and a second conductive rod. The two conductive rods are automatically pressed into corresponding mounting positions of the module body 22. The module body 22 and the shunt sheet 1 are provided with matching guide configurations for automatic assembly of the two. The two conductive rods 21 are respectively electrically connected to the first sampling point and the second sampling point of the shunt sheet 1 to form a first sampling foot and a second sampling foot. The assembly steps of the conductive rod module assembly and the shunt sheet are as follows: (1) the conductive rods are first pressed into corresponding mounting positions of the module body to form a conductive rod module assembly; (2) then the conductive rod module assembly is installed on the shunt sheet; (3) the sampling points of the shunt sheet are in surface contact with the corresponding conductive rods and the two contact surfaces are electrically connected to realize signal sampling.

[0042] See also Figures 1 to 12 In the present invention, the conductive rod is first pressed into the corresponding installation position of the module body to form a conductive rod module assembly, and then the conductive rod module assembly is installed on the shunt. The high resistivity material used in the shunt 1 of the present invention is manganese copper. Of course, the high resistivity material can also be other types of materials, such as constantan. The first sampling point and the second sampling point of the shunt 1 are two sampling bosses 11 and 12. The side of each sampling boss contacts the side of the crimping terminal 3 of the conductive rod 21 and is welded and fixed. The module body 22 is fixed to the shunt 1 by snap-fitting when assembled. Specifically, the module body 22 is provided with an upper snap 221, a lower snap 222 and a limit platform on the other two sides. The limit platform is a T-shaped platform. When the module body 22 and the shunt 1 are installed in place, the upper snap 221 and the lower snap 222 fix the shunt with the front plane 223 of the limit platform. In this embodiment, there is one upper snap and two lower snaps. The module body 22 is provided with a guide positioning hole 224, and the shunt piece 1 is provided with a corresponding guide positioning column 13. The guide positioning column 13 and the guide positioning hole 224 constitute a guide configuration for the automatic positioning and assembly of the conductive rod module assembly 2 and the shunt piece 1. The guide positioning hole 224 of the module body 22 is set on the limit table, and the entrance of the guide positioning hole 224 is placed on the front plane 223 of the limit table. The guide positioning hole 224 cooperates with the corresponding guide positioning column 13 to realize the guiding function and cooperates with the limit table to realize the limit assembly. During automatic assembly, the guide positioning column 13 of the shunt piece 1 is inserted into the corresponding guide positioning hole 224 to realize the guide limit.

[0043] See also Figure 5 - Figure 7In the embodiment of the present invention, two grooves 225 are provided on one side of the upper part of the module body 22 to form the installation position of the conductive rod. The two conductive rods are symmetrically arranged. The ends 211 of the conductive rods extend outside the module body to form external terminals or sampling terminals. The two grooves are arranged in parallel so that the vertical part of the conductive rod 21 is clamped and positioned. A barrier is provided between the two grooves of the module body 22. The barrier extends upward from the top. The thickness of the barrier is equal to the distance between the two conductive rods. The distance between the conductive rods can be as small as possible to reduce the interference of the power frequency magnetic field. The notch of the groove 225 is a bayonet with a certain elastic expansion, and the bayonet distance is slightly smaller than the diameter of the conductive rod 21.

[0044] See also Figure 8 - Fig. 9 In this embodiment, a crimping terminal 3 is provided at one end of the conductive rod 21, and the conductive rod is bent to form an L shape near the terminal. The bending part of the conductive rod 21 or the crimping terminal abuts against the corresponding limiting surface of the module body 22 to accurately position the vertical end of the conductive rod to facilitate assembly with the PCB board, such as the surface of the buckle on the module body 22 forms a limiting surface that abuts against the bending part of the conductive rod for limiting.

[0045] See also Figures 1 to 12The present invention is provided with a shunt sheet 1, a conductive rod module part (i.e., a module body 22, and each conductive rod module part hereinafter refers to the module body 22), and a conductive rod part. The conductive rod module part is provided with an upper buckle 221, a lower buckle 222, a guide positioning hole 224, a plane 223, and a groove 225. The conductive rod part is provided with a conductive rod 21, a crimping terminal 3, and a conductive rod end 211. The shunt sheet 1 is provided with sampling bosses 11, 12, and a guide positioning column 13. The automated production of the conductive rod part is that conventional copper wire is cut into the conductive rod at twice the length, the terminals are crimped and bent at both ends, and the conductive rod is cut in the middle. The conductive rod part can be automatically pressed into the groove 225 to complete the conductive rod module part. The conductive rod module part is installed on the shunt sheet 1. During automated installation, the guide positioning function is completed by the cooperation of the guide positioning hole 224 and the guide positioning column 13. When installed in place, the upper buckle 221 and the lower buckle 222 are on the same plane 223 to fix the shunt sheet 1. After fixing, the crimping terminal 3 will contact the sampling foot (sampling bosses 11, 12), and the two can be automatically welded to complete the connection. Because the conductive rod end 211 has been accurately sized in the conductive rod module part, the installation of the PCB board can also be automatically assembled and welded when the electric meter is assembled. The present invention uses a conductive rod instead of a soft wire, which is led out from the sampling point and only needs to be cut with a conventional copper wire at twice the length, which is low in cost. At the same time, the gap between the conductive rods can be as small as possible to reduce the interference of the power frequency magnetic field. The scheme of the present invention uses the module as a carrier to realize automated mass production, thereby reducing labor costs and improving assembly efficiency. The conductive rod in the present invention can be a copper rod or other metal rods with conductive functions, such as an aluminum alloy conductive rod, a copper alloy rod, a copper-clad steel conductive rod, etc.

[0046] The present invention also provides an electronic electric energy meter capable of resisting magnetic field interference, comprising the sampling structure in the above embodiment, wherein the end of the conductive rod is automatically assembled and welded with the PCB board to collect signals.

[0047] The present invention provides a shunt chip sampling solution that can realize automatic batch production of modules under the premise of ensuring the function of anti-magnetic interference, which has the following beneficial effects:

[0048] 1. In the present invention, the gap between the two conductive bars can be as small as possible. For example, the thickness of the barrier between the conductive bar installation positions can be controlled to be as small as possible during design to control the effective range of the conductive magnetic field, thereby realizing the anti-magnetic interference function of the electronic electric energy meter.

[0049] 2. The present invention can realize automatic mass production of modules through the following steps, thereby reducing labor costs and improving assembly efficiency:

[0050] 2.1 Production of conductive rods: When the conductive rods of the present invention are copper rods, conventional copper wires are cut into conductive rods at twice the length, terminals are crimped and bent at both ends, and the conductive rods are cut in the middle, so that two conductive rods can be produced at one time;

[0051] 2.2. Automated assembly of the conductive rod module assembly: The two conductive rods are automatically pressed into the corresponding installation positions of the module body, that is, into the groove 225 of the module body;

[0052] 2.3 Automated assembly of sampling structure: The conductive rod module assembly is installed on the shunt plate 1 through the guiding and positioning function. When installed in place, the limiting structure of the module body fixes the shunt plate 1. After fixation, the crimping terminal 3 will contact the sampling bosses 11 and 12, and the two can be automatically welded to complete the connection.

[0053] 3. The assembly of the conductive rod end 211 and the PCB board of the sampling structure of the present invention. Because the conductive rod end 211 has been accurately dimensionally positioned in the conductive rod module part, the installation of the PCB board can also be automatically assembled and welded during the assembly of the electric meter, which can improve the assembly efficiency of the electric meter.

[0054] The above records are only embodiments of the present invention. Any modification or change made by a person familiar with the present technology using the present invention shall fall within the patent scope claimed by the present invention and shall not be limited to those disclosed in the embodiments.

Claims

1. A sampling structure of an electronic electric energy meter capable of resisting magnetic field interference, characterized in that include: A shunt sheet, on which a first sampling point and a second sampling point are provided, and the shunt sheet is made of a high resistivity material; A conductive rod module assembly comprises a conductive rod and a module body, wherein the conductive rod consists of a first conductive rod and a second conductive rod, the two conductive rods are automatically pressed into corresponding mounting positions of the module body, the module body and the shunt sheet are provided with matching guide configurations for automatic assembly of the two, and the two conductive rods are respectively electrically connected to a first sampling point and a second sampling point of the shunt sheet to form a first sampling foot and a second sampling foot.

2. The sampling structure of the electronic electric energy meter capable of resisting magnetic field interference according to claim 1 is characterized in that: The module body and the shunt sheet are fixed by snap fit during assembly.

3. The sampling structure of the electronic electric energy meter capable of resisting magnetic field interference according to claim 1 is characterized in that: The module body is provided with an upper buckle, a lower buckle and limit platforms on the other two sides. When the module body and the shunt are installed in place, the upper buckle, the lower buckle and the front plane of the limit platform fix and clamp the shunt.

4. The sampling structure of the electronic electric energy meter capable of resisting magnetic field interference according to any one of claims 1 to 3, characterized in that: The module body is provided with a guide positioning hole, and the shunt piece is provided with a corresponding guide positioning column. The guide positioning column and the guide positioning hole constitute a guide configuration for automatic positioning and assembly of the conductive rod module assembly and the shunt piece.

5. The sampling structure of the electronic electric energy meter capable of resisting magnetic field interference according to claim 4 is characterized in that: The guide positioning hole of the module body is arranged on the limit platform, the entrance of the guide positioning hole is placed on the front plane of the limit platform, the guide positioning hole cooperates with the corresponding guide positioning column to realize the guide function and cooperates with the limit platform to realize the limit assembly.

6. The sampling structure of the electronic electric energy meter capable of resisting magnetic field interference according to claim 1 is characterized in that: Two grooves are arranged on one side of the upper part of the module body to form the installation position of the conductive rod. The two grooves are arranged in parallel to clamp and position the vertical part of the conductive rod. The end of the conductive rod extends outside the module body to form a sampling terminal.

7. The sampling structure of the electronic electric energy meter capable of resisting magnetic field interference according to claim 6 is characterized in that: A barrier is provided between the two grooves of the module body. The barrier extends upward from the top end. The notch of each groove is a bayonet with a certain elastic expansion. The bayonet spacing is slightly smaller than the diameter of the conductive rod.

8. The sampling structure of the electronic electric energy meter capable of resisting magnetic field interference according to claim 1 is characterized in that: A crimping terminal is provided at one end of the conductive rod, and the conductive rod is bent to form an L shape near the terminal. The bent part of the conductive rod or the crimping terminal abuts against the corresponding limiting surface of the module body to accurately position the vertical end of the conductive rod to facilitate assembly with the PCB board.

9. The sampling structure of the electronic electric energy meter capable of resisting magnetic field interference according to claim 8 is characterized in that: The first sampling point and the second sampling point of the shunt plate are two sampling bosses, and the side surface of each sampling boss contacts and is welded and fixed to the side surface of the crimping terminal of the conductive rod.

10. A method for assembling a sampling structure of an electronic electric energy meter capable of resisting magnetic field interference, characterized in that: The sampling structure of the electric energy meter includes: A flow divider having a first sampling point and a second sampling point; A conductive rod module assembly, comprising a conductive rod and a module body, wherein the conductive rod is composed of a first conductive rod and a second conductive rod, the two conductive rods are automatically pressed into corresponding mounting positions of the module body, the module body and the shunt sheet are provided with matching guide configurations for automatic assembly of the two, and the two conductive rods are respectively electrically connected to a first sampling point and a second sampling point of the shunt sheet to form a first sampling foot and a second sampling foot; The steps of assembling the conductive rod module assembly and the shunt sheet are as follows: The conductive rod is first pressed into the corresponding installation position of the module body to form a conductive rod module assembly; Then the conductive rod module assembly is installed on the shunt sheet; The sampling points of the shunt sheets are electrically connected to the corresponding conductive rods to realize signal sampling.

11. An electronic electric energy meter capable of resisting magnetic field interference, comprising the sampling structure of the electronic electric energy meter capable of resisting magnetic field interference as claimed in any one of claims 1 to 9, wherein the end of the conductive rod is automatically assembled and welded with the PCB board to collect signals.

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