A dual-channel metering electric energy meter seat structure and electric energy meter

Abstract

The present invention provides a dual-channel metering base structure and an electric energy meter. The base structure includes a base housing and a first relay assembly and a second relay assembly disposed within the base housing. The first relay assembly includes a first relay body, a first input conductive plate, and a first output conductive plate. The first input conductive plate is provided with a first sampling resistor. The second relay assembly includes a second relay body, a second input conductive plate, and a second output conductive plate. The second relay body is positioned above the first relay body. The second input conductive plate is provided with a second sampling resistor parallel to the first sampling resistor. The second sampling resistor is positioned above the first sampling resistor, and the two sampling resistors are spaced apart in a first predetermined vertical distance. The present invention can reduce the size of the electric energy meter, lower manufacturing costs, and reduce the space required for on-site assembly, facilitating installation and construction. Furthermore, the invention can reduce the mutual interference of the magnetic fields generated by the two sampling resistors, thereby ensuring the accuracy of the collected data.

Description

Technical Field

[0001] The present invention relates to the technical field of electric energy meters, and in particular to an electric energy meter seat structure for dual-channel measurement and an electric energy meter. Background Art

[0002] An electric energy meter is an instrument used to measure electrical energy. Also known as a watt-hour meter, fire meter, or kilowatt-hour meter, it refers to an instrument that measures various electrical quantities. Traditional single-phase electronic electric energy meters only had a single metering channel. Multiple channels were added by increasing the number of electric energy meters. However, as the number of electric energy meters increased, the corresponding meter boxes also had to be larger, and the internal power wiring assembly technology requirements also increased, resulting in higher manufacturing and application costs.

[0003] At present, there are single-phase electronic electricity meters with two or even more metering channels in the existing technology. For example, the Chinese utility model patent with authorization announcement number CN203479897U discloses a dual-channel metering single-phase electricity meter, which includes a dual-channel current sampling circuit and a dual-channel metering chip. The dual-channel current sampling circuit includes two parallel output circuits respectively connected to the mains live wire. Both output circuits measure the live wire current. The first output circuit includes a first current sampling module and a first switch connected in series. The second output circuit includes a second current sampling module and a second switch connected in series. The first switch and the second switch control the two output circuits respectively. The current sampling module is a mutual inductor or a manganese copper resistor.

[0004] The above patent only provides a circuit diagram for dual-channel metering, without a specific layout structure of the electric energy meter. In actual application, if a mutual inductor is used as a current sampling module, although the mutual inductor is relatively reliable, the mutual inductor is a hollow cylinder (for example, a multi-current channel single-phase electronic electric energy meter seat structure disclosed in the Chinese utility model patent with authorization announcement number CN207689549U), which occupies a large space, resulting in a larger size of the entire electric energy meter, a relatively high space requirement for on-site assembly, inconvenience in on-site installation and construction, and a high cost.

[0005] The use of manganese copper resistors (i.e., sampling resistors) as current sampling modules is also known technology. For example, Chinese utility model patent No. CN204905166U discloses a magnetic latching relay for an electric energy meter, which includes a first current connection bar, a second current connection bar, and a relay body. The first current connection bar is used to connect to the live wire of the power supply, and the second current connection bar is used to connect to the load. A sampling resistor is disposed in the middle of the first current connection bar. Although the sampling resistor is sheet-shaped, small in size, and low in cost, research has found that a magnetic field is generated around the sampling resistor when energized. When two relays and two sampling resistors are used for dual-channel metering, the magnetic fields generated by the two sampling resistors easily interfere with each other, affecting the accuracy of the collected data. Summary of the Invention

[0006] The object of the present invention is to provide a dual-channel metering electric energy meter base structure with small size, low cost and higher measurement accuracy; the object of the present invention is also to provide an electric energy meter with small size, low cost and higher measurement accuracy.

[0007] To achieve the above objectives, the dual-channel metering electric energy meter base structure of the present invention adopts the following technical solutions:

[0008] A dual-channel metering electric energy meter base structure includes a bottom shell with an upward opening and a first relay assembly and a second relay assembly disposed within the bottom shell. The first relay assembly includes a first relay body and a first input conductive plate and a first output conductive plate located in front of the first relay body. The first input conductive plate is used to electrically connect to an input live wire. A first sampling resistor is provided on the first input conductive plate. The first output conductive plate is used to electrically connect to the first output live wire. The second relay assembly includes a second relay body and a second input conductive plate and a second output conductive plate located in front of the second relay body. The second relay body is located above the first relay body. The second output conductive plate is used to electrically connect to the second output live wire. The second input conductive plate is used to electrically connect to the input live wire. A second sampling resistor is provided on the second input conductive plate, parallel to the first sampling resistor. The second sampling resistor is located above the first sampling resistor, with a set first spacing between the two in the vertical direction.

[0009] The beneficial effects of the above technical solution are as follows: the meter base structure of the present invention includes a bottom shell with an upward opening, in which a first relay assembly and a second relay assembly are disposed, and the second relay body is located above the first relay body. The two relay bodies are arranged one above the other, which can save horizontal space and reduce the horizontal size occupied by the meter base structure. The first input conductive plate of the first relay assembly and the second input conductive plate of the second relay assembly are both electrically connected to the input live wire. The first output conductive plate of the first relay assembly is electrically connected to the first output live wire, and the second output conductive plate of the second relay assembly is electrically connected to the second output live wire, thereby achieving two output circuits connected in parallel on one input live wire. The first input conductive plate is provided with a first sampling resistor, and the second input conductive plate is provided with a second sampling resistor. The sampling resistors are used as current sampling modules. The sampling resistors are small in size and low in cost, which can reduce the volume and manufacturing cost of the meter base structure, reduce the space required for on-site assembly of the electric energy meter, and facilitate on-site installation and construction. At the same time, the second sampling resistor is arranged parallel to and above the first sampling resistor, with a predetermined first spacing between the two in the vertical direction. This can reduce mutual interference of the magnetic fields generated by the two sampling resistors, ensure the accuracy of collected data, and thereby improve measurement accuracy.

[0010] Furthermore, the first input conductive plate is used to be directly electrically connected to the input live wire, and the second input conductive plate is connected to the first input conductive plate.

[0011] The beneficial effects of the above technical solution are: simple structure, and convenient electrical connection between the two input conductive plates and the input live wire.

[0012] Furthermore, the first input conductive plate includes a live wire input section extending horizontally in the front-to-back direction for connecting to the input live wire, a first bent section bent downward is provided at the rear end of the live wire input section, a second bent section bent backward is provided at the lower end of the first bent section, and the second bent section is electrically connected to the first sampling resistor; the second input conductive plate includes an L-shaped input section, a horizontal section of the L-shaped input section is in contact with and fixed to the upper surface of the live wire input section, and a vertical section of the L-shaped input section extends upward and is electrically connected to the second sampling resistor.

[0013] The beneficial effects of the above technical solution are: the live wire input section is electrically connected to the first sampling resistor through the first bending section and the second bending section, and the second input conductive plate includes an L-shaped input section, which is convenient for connecting to both the live wire input section and the second sampling resistor. The overall structure is simple and compact, and is convenient for layout, setting and installation.

[0014] Furthermore, the horizontal section of the L-shaped input section and the live wire input section are fixed in the bottom shell by a fixing screw, and the horizontal section and the live wire input section are respectively provided with upper and lower coaxial corresponding screw through holes for the fixing screw to pass through.

[0015] The beneficial effects of the above technical solution are that it can not only realize the fixed installation of the two relay components, but also realize the conductive connection between the first input conductive plate and the second input conductive plate, and the structure is simple and compact.

[0016] Furthermore, the first output conductive plate includes a first live wire output section that is horizontal and extends in the front-to-back direction and is used to connect to the first output live wire. The second output conductive plate includes a second live wire output section that is horizontal and extends in the front-to-back direction and is used to connect to the second output live wire. The live wire input section, the first live wire output section, and the second live wire output section are in the same horizontal plane and are arranged at intervals along the left-to-right direction. The first live wire output section and the second live wire output section are also fixed in the bottom shell by fixing screws respectively, and the screw through holes on the first live wire output section and the second live wire output section are arranged at intervals along the left-to-right direction with the screw through holes on the horizontal section and the live wire input section.

[0017] The beneficial effects of the above technical solution are that the live wire input section, the first live wire output section, and the second live wire output section arranged side by side on the left and right facilitate the stable installation of the two relay assemblies in the bottom shell. The installation structure is simple, easy to assemble, and convenient for electrical connection between the input live wire and the output live wire.

[0018] Furthermore, a terminal seat is installed at the front end of the bottom shell, and the terminal seat includes an injection molded body and a connecting conductor arranged in the injection molded body. A connecting boss is integrally formed on the outer surface of the injection molded body. There are multiple connecting bosses and they are respectively arranged one by one below the live wire input section, the first live wire output section, and the second live wire output section. Each connecting boss is provided with a threaded hole coaxially corresponding to the screw through-hole.

[0019] The beneficial effect of the above technical solution is that the live wire input section, the first live wire output section and the second live wire output section are fixed by the connecting boss integrally provided on the terminal seat, which facilitates manufacturing and assembly.

[0020] Furthermore, the first relay body and the second relay body are staggered in the front-to-back direction, and the first sampling resistor piece and the second sampling resistor piece have a set second interval in the front-to-back direction.

[0021] The beneficial effect of the above technical solution is that, in addition to the set first spacing in the up-down direction, a set second spacing is also provided in the front-back direction, thereby further avoiding mutual interference of the magnetic fields generated by the two sampling resistors and ensuring the accuracy of the collected data.

[0022] Furthermore, the first live wire output section is located on the left side of the second live wire output section, and the rear end of the first live wire output section is provided with a third bending section that bends downward, and the third bending section is L-shaped. The third bending section includes a lower extension section extending downward and a right extension section extending to the right, and the right extension section is located below the second output conductive plate. The right end of the right extension section is provided with a fourth bending section that bends backward, and the fourth bending section is connected to the first relay body.

[0023] The beneficial effects of the above technical solution are: the structure is more compact, which is conducive to reducing the volume and facilitating the unified wiring of the live wire input section, the first live wire output section, and the second live wire output section.

[0024] Furthermore, the first sampling resistor and the second sampling resistor are both arranged vertically and their thickness directions are both front-to-back directions. The first sampling resistor is arranged close to the front side of the first relay body, and the second sampling resistor is arranged close to the front side of the second relay body.

[0025] The beneficial effect of the above technical solution is that the structure is more compact, which is conducive to reducing the volume.

[0026] To achieve the above objectives, the dual-channel electric energy meter of the present invention adopts the following technical solutions:

[0027] A dual-channel electric energy meter includes a meter base structure and an upper cover. The meter base structure includes a bottom shell with an upward opening and a first relay assembly and a second relay assembly disposed within the bottom shell. The first relay assembly includes a first relay body and a first input conductive plate and a first output conductive plate located in front of the first relay body. The first input conductive plate is used to electrically connect to an input live wire. A first sampling resistor is disposed on the first input conductive plate. The first output conductive plate is used to electrically connect to the first output live wire. The second relay assembly includes a second relay body and a second input conductive plate and a second output conductive plate located in front of the second relay body. The second relay body is located above the first relay body. The second output conductive plate is used to electrically connect to the second output live wire. The second input conductive plate is used to electrically connect to the input live wire. A second sampling resistor is disposed on the second input conductive plate and is parallel to the first sampling resistor. The second sampling resistor is located above the first sampling resistor with a set first spacing therebetween in the vertical direction.

[0028] The beneficial effects of the above technical solution are as follows: the meter base structure of the present invention includes a bottom shell with an upward opening, in which a first relay assembly and a second relay assembly are disposed, and the second relay body is located above the first relay body. The two relay bodies are arranged one above the other, which can save horizontal space and reduce the horizontal size occupied by the meter base structure. The first input conductive plate of the first relay assembly and the second input conductive plate of the second relay assembly are both electrically connected to the input live wire. The first output conductive plate of the first relay assembly is electrically connected to the first output live wire, and the second output conductive plate of the second relay assembly is electrically connected to the second output live wire, thereby achieving two output circuits connected in parallel on one input live wire. The first input conductive plate is provided with a first sampling resistor, and the second input conductive plate is provided with a second sampling resistor. The sampling resistors are used as current sampling modules. The sampling resistors are small in size and low in cost, which can reduce the volume and manufacturing cost of the meter base structure, reduce the space required for on-site assembly of the electric energy meter, and facilitate on-site installation and construction. At the same time, the second sampling resistor is arranged parallel to and above the first sampling resistor, with a predetermined first spacing between the two in the vertical direction. This can reduce mutual interference of the magnetic fields generated by the two sampling resistors, ensure the accuracy of collected data, and thereby improve measurement accuracy.

[0029] Furthermore, the first input conductive plate is used to be directly electrically connected to the input live wire, and the second input conductive plate is connected to the first input conductive plate.

[0030] The beneficial effects of the above technical solution are: simple structure, and convenient electrical connection between the two input conductive plates and the input live wire.

[0031] Furthermore, the first input conductive plate includes a live wire input section extending horizontally in the front-to-back direction for connecting to the input live wire, a first bent section bent downward is provided at the rear end of the live wire input section, a second bent section bent backward is provided at the lower end of the first bent section, and the second bent section is electrically connected to the first sampling resistor; the second input conductive plate includes an L-shaped input section, a horizontal section of the L-shaped input section is in contact with and fixed to the upper surface of the live wire input section, and a vertical section of the L-shaped input section extends upward and is electrically connected to the second sampling resistor.

[0032] The beneficial effects of the above technical solution are: the live wire input section is electrically connected to the first sampling resistor through the first bending section and the second bending section, and the second input conductive plate includes an L-shaped input section, which is convenient for connecting to both the live wire input section and the second sampling resistor. The overall structure is simple and compact, and is convenient for layout, setting and installation.

[0033] Furthermore, the horizontal section of the L-shaped input section and the live wire input section are fixed in the bottom shell by a fixing screw, and the horizontal section and the live wire input section are respectively provided with upper and lower coaxial corresponding screw through holes for the fixing screw to pass through.

[0034] The beneficial effects of the above technical solution are that it can not only realize the fixed installation of the two relay components, but also realize the conductive connection between the first input conductive plate and the second input conductive plate, and the structure is simple and compact.

[0035] Furthermore, the first output conductive plate includes a first live wire output section that is horizontal and extends in the front-to-back direction and is used to connect to the first output live wire. The second output conductive plate includes a second live wire output section that is horizontal and extends in the front-to-back direction and is used to connect to the second output live wire. The live wire input section, the first live wire output section, and the second live wire output section are in the same horizontal plane and are arranged at intervals along the left-to-right direction. The first live wire output section and the second live wire output section are also fixed in the bottom shell by fixing screws respectively, and the screw through holes on the first live wire output section and the second live wire output section are arranged at intervals along the left-to-right direction with the screw through holes on the horizontal section and the live wire input section.

[0036] The beneficial effects of the above technical solution are that the live wire input section, the first live wire output section, and the second live wire output section arranged side by side on the left and right facilitate the stable installation of the two relay assemblies in the bottom shell. The installation structure is simple, easy to assemble, and convenient for electrical connection between the input live wire and the output live wire.

[0037] Furthermore, a terminal seat is installed at the front end of the bottom shell, and the terminal seat includes an injection molded body and a connecting conductor arranged in the injection molded body. A connecting boss is integrally formed on the outer surface of the injection molded body. There are multiple connecting bosses and they are respectively arranged one by one below the live wire input section, the first live wire output section, and the second live wire output section. Each connecting boss is provided with a threaded hole coaxially corresponding to the screw through-hole.

[0038] The beneficial effect of the above technical solution is that the live wire input section, the first live wire output section and the second live wire output section are fixed by the connecting boss integrally provided on the terminal seat, which facilitates manufacturing and assembly.

[0039] Furthermore, the first relay body and the second relay body are staggered in the front-to-back direction, and the first sampling resistor piece and the second sampling resistor piece have a set second interval in the front-to-back direction.

[0040] The beneficial effect of the above technical solution is that, in addition to the set first spacing in the up-down direction, a set second spacing is also provided in the front-back direction, thereby further avoiding mutual interference of the magnetic fields generated by the two sampling resistors and ensuring the accuracy of the collected data.

[0041] Furthermore, the first live wire output section is located on the left side of the second live wire output section, and the rear end of the first live wire output section is provided with a third bending section that bends downward, and the third bending section is L-shaped. The third bending section includes a lower extension section extending downward and a right extension section extending to the right, and the right extension section is located below the second output conductive plate. The right end of the right extension section is provided with a fourth bending section that bends backward, and the fourth bending section is connected to the first relay body.

[0042] The beneficial effects of the above technical solution are: the structure is more compact, which is conducive to reducing the volume and facilitating the unified wiring of the live wire input section, the first live wire output section, and the second live wire output section.

[0043] Furthermore, the first sampling resistor and the second sampling resistor are both arranged vertically and their thickness directions are both front-to-back directions. The first sampling resistor is arranged close to the front side of the first relay body, and the second sampling resistor is arranged close to the front side of the second relay body.

[0044] The beneficial effect of the above technical solution is that the structure is more compact, which is conducive to reducing the volume. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 A three-dimensional diagram of the electric energy meter with dual channels according to the present invention;

[0046] Figure 2 This is an exploded view of the electric energy meter with dual channels of the present invention;

[0047] Figure 3 A top view of the bottom shell of the electric energy meter with dual-channel metering according to the present invention;

[0048] Figure 4 A three-dimensional diagram of the bottom shell of the electric energy meter with dual-channel metering according to the present invention;

[0049] Figure 5 A three-dimensional diagram of the connection structure of the first relay assembly, the second relay assembly and the neutral line connection plate in the dual-channel metering electric energy meter of the present invention;

[0050] Figure 6 A three-dimensional diagram (one viewing angle) of the connection structure of the first relay assembly and the second relay assembly in the dual-channel metering electric energy meter of the present invention;

[0051] Figure 7 A three-dimensional diagram of the connection structure of the first relay assembly and the second relay assembly in the dual-channel metering electric energy meter of the present invention (from another perspective);

[0052] Figure 8 A three-dimensional diagram of the connection structure of the first relay assembly and the second relay assembly in the electric energy meter with dual-channel metering according to the present invention (from another perspective);

[0053] Figure 9 This is a side view of the connection structure of the first relay assembly and the second relay assembly in the dual-channel metering electric energy meter of the present invention.

[0054] In the figure: 1, buckle; 2, bottom shell; 3, terminal block; 31, connecting boss; 32, connecting conductor; 4, first relay assembly; 41, first relay body; 42, first input conductive plate; 421, live wire input section; 422, first bending section; 423, second bending section; 424, first input section; 43, first output conductive plate; 431, first live wire output section; 432, third bending section; 433, fourth bending section; 44, first sampling resistor; 45, first twisted pair ; 5. Second relay assembly; 51. Second relay body; 52. Second input conductive plate; 521. L-shaped input section; 522. Second input section; 53. Second output conductive plate; 531. Second live wire output section; 532. Inclined section; 533. Second output section; 54. Second sampling resistor; 55. Second twisted pair; 6. Main board; 7. Display PCB; 8. Terminal cover; 9. Top cover; 10. Terminal film; 11. Lens; 12. Lens film; 13. Neutral wire connection board. DETAILED DESCRIPTION

[0055] In order to make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present invention and are not intended to limit the present invention. That is, the embodiments described herein are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and illustrated in the drawings herein may be arranged and designed in various different configurations.

[0056] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely intended to represent selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0057] It should be noted that relational terms such as "first" and "second" that may appear are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, terms such as "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article or device. In the absence of further limitations, an element defined by a sentence such as "including a..." does not exclude the presence of other identical elements in the process, method, article or device that includes the element.

[0058] The features and performance of the present invention are further described in detail below with reference to the embodiments.

[0059] An embodiment of the dual-channel meter (hereinafter referred to as the meter) of the present invention is as follows: Figure 1 and Figure 2 As shown, when the electric energy meter is in a horizontal position, the electric energy meter includes a base structure at the bottom and an upper cover 9. The base structure includes a buckle 1, a bottom shell 2, a terminal block 3, a first relay assembly 4, a second relay assembly 5, a main board 6, a display PCB 7, and a terminal film 10. The opening of the bottom shell 2 faces upward, the buckle 1 is mounted on the bottom surface of the bottom shell 2, the terminal block 3 is mounted on the front end of the bottom shell 2, and the first relay assembly 4, the second relay assembly 5, and the main board 6 are disposed within the bottom shell 2. The upper cover 9 is fixed to the bottom shell 2, the display PCB 7 is located within the upper cover 9, and the terminal cover 8, the lens 11, and the lens film 12 are mounted on the upper cover 9.

[0060] like Figure 5 As shown, the first relay assembly 4 includes a first relay body 41 and a first input conductive plate 42 and a first output conductive plate 43 located in front of the first relay body 41. The first input conductive plate 42 is used to electrically connect to the input live wire. The first input conductive plate 42 is provided with a first sampling resistor 44. The first output conductive plate 43 is used to electrically connect to the first output live wire (i.e., the first user live wire). The second relay assembly 5 includes a second relay body 51 and a second input conductive plate 52 and a second output conductive plate 53 located in front of the second relay body 51. The second relay body 51 is located above the first relay body 41. The second output conductive plate 53 is used to electrically connect to the second output live wire (i.e., the second user live wire). The second input conductive plate 52 is used to electrically connect to the input live wire. The second input conductive plate 52 is provided with a second sampling resistor 54 parallel to the first sampling resistor 44. The second sampling resistor 54 is located above the first sampling resistor 44 and there is a set first spacing between the two in the vertical direction, as shown in FIG. Figure 9 shown.

[0061] Specifically, the first input conductive plate 42 is used to be directly electrically connected to the input live wire, and the second input conductive plate 52 is connected to the first input conductive plate 42, so that both input conductive plates are electrically connected to the input live wire, that is, two output circuits are connected in parallel on one input live wire.

[0062] like Figure 6 、 Figure 7 、 Figure 8 as well as Figure 9 As shown, the first input conductive plate 42 includes a horizontal live wire input section 421 extending in the front-to-back direction for connecting to the live wire input. A downwardly bent first section 422 is provided at the rear end of the live wire input section 421. A rearwardly bent second section 423 is provided at the lower end of the first bent section 422. The second bent section 423 is electrically connected to the first sampling resistor 44. Specifically, the first input conductive plate 42 also includes a first input section 424 connected to the first relay body 41. The first input section 424 extends leftward after exiting the first relay body 41, and the rear end of the second bent section 423 is integrally connected to the left end of the first input section 424. The first sampling resistor 44 is fixedly disposed in the middle of the first input section 424. The first sampling resistor 44 is vertically arranged with its thickness oriented in the front-to-back direction, such that it is positioned close to the front side of the first relay body 41. The first sampling resistor 44 is connected to the display PCB 7 via a first twisted pair 45.

[0063] like Figures 6 to 9 As shown, the second input conductive plate 52 includes an L-shaped input section 521. The horizontal section of the L-shaped input section 521 is fixedly attached to the upper surface of the live input section 421. The vertical section of the L-shaped input section 521 extends upward and is electrically connected to the second sampling resistor 54. Specifically, the second input conductive plate 52 also includes a second input section 522 connected to the second relay body 51. The second input section 522 also extends leftward after exiting the second relay body 51. The upper end of the vertical section of the L-shaped input section 521 overlaps and is welded to the left end of the second input section 522. The second sampling resistor 54 is fixedly disposed in the middle of the second input section 522. The second sampling resistor 54 is also vertically arranged with its thickness oriented in the front-to-back direction, so that it is positioned close to the front side of the second relay body 51. The second sampling resistor 54 is connected to the display PCB 7 via a second twisted pair 55.

[0064] During fixed installation, the horizontal section of the L-shaped input section 521 and the live wire input section 421 are fixed in the bottom shell 2 by a fixing screw, and the horizontal section and the live wire input section 521 are respectively provided with upper and lower coaxial corresponding screw through holes for the fixing screw to pass through.

[0065] like Figure 6 、 Figure 7 and Figure 8 As shown, the first output conductive plate 43 includes a first live wire output section 431 that is horizontal and extends in the front-to-back direction for connecting to the first output live wire. The rear end of the first live wire output section 431 is provided with a third bending section 432 that bends downward. The third bending section 432 is L-shaped. The third bending section 432 includes a lower extension section extending downward and a right extension section extending to the right. The right extension section is located below the second output conductive plate 53. The right end of the right extension section is provided with a fourth bending section 433 that bends backward. The fourth bending section 433 is connected to the first relay body 41.

[0066] like Figures 6 to 8 As shown, the second output conductive plate 53 includes a second live wire output section 531 extending horizontally and in the front-to-back direction for connection to the second output live wire. The second output conductive plate 53 also includes a second output section 533 connected to the second relay body 51. The second output section 533 extends rightward after exiting the second relay body 51. The second output section 533 is integrally connected to the second live wire output section 531 via an inclined section 532, positioning the second live wire output section 531 to the right of the first live wire output section 431. Furthermore, the live wire input section 421, the first live wire output section 431, and the second live wire output section 531 are located in the same horizontal plane and spaced apart in the left-to-right direction, with equal spacing between them. This results in a compact overall structure and reduces size.

[0067] In addition, if Figure 5 As shown, the electric energy meter also includes a neutral line connection plate 13 for connecting to the neutral line. The neutral line connection plate 13 is located on the right side of the second live line output section 531, and the size of the neutral line connection plate 13 is equal to that of the live line input section 421, the first live line output section 431, and the second live line output section 531. The front ends of the four are all inserted into the connecting conductor 32 in the terminal block 3. The terminal block 3 includes an injection molded body, and the connecting conductor 32 is provided in the injection molded body, as shown in FIG. Figure 3 and Figure 4 As shown, a connecting boss 31 is integrally formed on the outer surface of the injection molded body. There are four connecting bosses 31 and they are respectively arranged one by one below the live wire input section 421, the first live wire output section 431, the second live wire output section 531 and the neutral wire connecting plate 13. The first live wire output section 431, the second live wire output section 531 and the neutral wire connecting plate 13 are respectively fixed on the connecting boss 31 by fixing screws. The screw holes on the first live wire output section 431, the second live wire output section 531 and the neutral wire connecting plate 13 are spaced apart in the left-right direction from the screw holes on the horizontal section and the live wire input section 421. Each connecting boss 31 is provided with a threaded hole coaxial with the screw hole.

[0068] The live wire input section 421, the first live wire output section 431, the second live wire output section 531, and the neutral wire connecting plate 13 are fixedly connected to the terminal seat 3 by fixing screws, so that the two relay components are fixedly set in the bottom shell 2, and the conductive plate adopts a special bending structure to ensure that the spacing is not too large. The structure is relatively compact, which can reduce the volume of the meter seat structure and facilitate the wiring between the input live wire, the output live wire and the neutral wire.

[0069] The present invention utilizes sampling resistors as the current sampling module, with both sampling resistors being manganese-copper resistors, which are compact and low-cost. This reduces the volume of the meter base structure, lowering the manufacturing cost of the electric energy meter, and also reduces the size and cost of the accompanying meter box. This also reduces the space required for on-site assembly of the electric energy meter, facilitating on-site installation and construction. Furthermore, the two sampling resistors have a predetermined first spacing in the vertical direction. Through the corresponding geometric dimensions and spatial structure, this reduces mutual interference between the magnetic fields generated by the two sampling resistors, ensuring the accuracy of collected data and thereby improving measurement accuracy.

[0070] In addition, if Figure 9 As shown, the first relay body 41 and the second relay body 51 are staggered in the front-to-back direction, so that the first sampling resistor 44 and the second sampling resistor 54 have a predetermined second spacing in the front-to-back direction. In other words, in addition to the predetermined first spacing in the vertical direction, the two sampling resistors also have a predetermined second spacing in the front-to-back direction. This further prevents mutual interference between the magnetic fields generated by the two sampling resistors, ensuring that the two outputs do not affect each other and that the accuracy of the collected data is guaranteed. In practice, the first relay body 41 and the second relay body 51 are also slightly staggered in the left-to-right direction to further prevent mutual interference between the magnetic fields.

[0071] In other embodiments of the dual-channel electric energy meter: without generating magnetic field interference, according to the specific structural design of the relay, the first sampling resistor and the second sampling resistor may also be arranged horizontally.

[0072] In other embodiments of the dual-channel metering electric energy meter: the first live wire output section can also be located on the right side of the second live wire output section. In this case, the bending structure needs to be adapted to avoid excessive or uneven spacing between the live wire input section, the first live wire output section, and the second live wire output section.

[0073] In other embodiments of the dual-channel electric energy meter: the first relay body and the second relay body are not staggered in the front-to-back direction, and have a set spacing only in the up-down direction.

[0074] In other embodiments of the dual-channel electric energy meter: a connecting boss can be integrally formed on the bottom shell for fixing the live wire input section, the first live wire output section, the second live wire output section and the neutral wire connecting plate.

[0075] In other embodiments of the dual-channel metering electric energy meter: the two relay bodies may not be fixed in the bottom shell by the live wire input section, the first live wire output section, the second live wire output section and the fixing screws, but other fixing structures may be provided on the relay body to achieve the fixation of the relay body, that is, the live wire input section, the first live wire output section and the second live wire output section are only responsible for conducting electricity.

[0076] In other embodiments of the dual-channel meter, the horizontal section of the L-shaped input section and the live wire input section may be fixed by welding, and then only the live wire input section is fixed in the bottom shell by fixing screws.

[0077] In other embodiments of the dual-channel electric energy meter: the second input conductive plate does not include an L-shaped input section, but includes a vertical section extending up and down, the lower end of the vertical section is fixedly connected to the first bent section, and the upper end is electrically connected to the second sampling resistor.

[0078] In other embodiments of the dual-channel meter, the live wire input section, the first bending section, and the second bending section are Z-shaped, and are not integrally connected to the first input section, but are superimposed and welded.

[0079] In other embodiments of the dual-channel electric energy meter: depending on the specific structural design of the relay and the arrangement of the two relay bodies, the first input conductive plate may not include the second bent section, but may be electrically connected to the first sampling resistor through the first bent section.

[0080] In other embodiments of the dual-channel electric energy meter: the second input conductive plate is directly electrically connected to the input live wire, and the first input conductive plate is connected to the second input conductive plate.

[0081] In other embodiments of the dual-channel electric energy meter, the first sampling resistor and the second sampling resistor may both be constantan resistors or chip resistors.

[0082] The embodiment of the dual-channel metering electric energy meter base structure in the present invention is as follows: The specific structure of the dual-channel meter base structure is the same as the base structure in the above-mentioned electric energy meter embodiment, and will not be repeated here.

[0083] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be based on the claims. Any equivalent structural changes made using the description and drawings of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A dual-channel metering electric energy meter stand structure, characterized in that: The invention comprises a bottom shell with an upward opening and a first relay assembly and a second relay assembly arranged in the bottom shell, wherein the first relay assembly comprises a first relay body and a first input conductive plate and a first output conductive plate located in front of the first relay body, wherein a first sampling resistor is arranged on the first input conductive plate; the second relay assembly comprises a second relay body and a second input conductive plate and a second output conductive plate located in front of the second relay body, wherein the second relay body is located above the first relay body, wherein the four sides of the two relay bodies are respectively arranged in the same side direction in correspondence with each other, wherein the bottom surface of the second relay body and the top surface of the first relay body are arranged opposite to each other in the upper and lower directions with a gap therebetween, wherein a second sampling resistor is arranged on the second input conductive plate and is parallel to the first sampling resistor, wherein the second sampling resistor is located above the first sampling resistor and a first predetermined gap is formed between the two in the upper and lower directions; wherein one of the output lines of the two relay bodies is close to the side of the relay body, and the other output line extends in a direction away from the side and is connected in series with the first sampling resistor or the second sampling resistor, wherein the first sampling resistor and the second sampling resistor are close to and parallel to each other On the front side of the corresponding relay body; the first input conductive plate includes a live wire input section extending horizontally and in the front-to-back direction for direct electrical connection to the input live wire, the rear end of the live wire input section is provided with a first bent section bent downward, the lower end of the first bent section is provided with a second bent section bent backward, the second bent section is electrically connected to the first sampling resistor; the second input conductive plate includes an L-shaped input section, the horizontal section of the L-shaped input section is in contact with and fixed to the upper surface of the live wire input section, the vertical section of the L-shaped input section extends upward and is electrically connected to the second sampling resistor; the first output conductive plate includes a horizontal section extending horizontally and in the front-to-back direction A first live wire output section is provided for connecting to the first output live wire, and the second output conductive plate includes a second live wire output section which is horizontal and extends in the front-to-back direction and is used to connect to the second output live wire. The live wire input section, the first live wire output section, and the second live wire output section are arranged in sequence from left to right. A third bending section is provided at the rear end of the first live wire output section, and the third bending section is L-shaped, including a lower extension section extending downward and a right extension section extending rightward. The right extension section is located below the second output conductive plate, and a fourth bending section is provided at the right end of the right extension section, which is bent backward. The fourth bending section is connected to the first relay body.

2. The dual-channel metering electric energy meter stand structure according to claim 1 is characterized in that: The horizontal section of the L-shaped input section and the live wire input section are fixed in the bottom shell by a fixing screw. The horizontal section and the live wire input section are respectively provided with upper and lower coaxial corresponding screw through holes for the fixing screw to pass through.

3. The dual-channel metering electric energy meter stand structure according to claim 2 is characterized in that: The first live wire output section and the second live wire output section are also fixed in the bottom shell by fixing screws respectively, and the screw holes on the first live wire output section and the second live wire output section are spaced apart from the screw holes on the horizontal section and the live wire input section in the left and right directions.

4. The dual-channel metering electric energy meter stand structure according to claim 3 is characterized in that: A terminal seat is installed at the front end of the bottom shell, and the terminal seat includes an injection molded body and a connecting conductor arranged in the injection molded body. A connecting boss is integrally formed on the outer surface of the injection molded body. There are multiple connecting bosses and they are respectively arranged one by one below the live wire input section, the first live wire output section, and the second live wire output section. Each connecting boss is provided with a threaded hole coaxially corresponding to the screw through-hole.

5. The dual-channel metering electric energy meter stand structure according to any one of claims 1 to 4, characterized in that: The first relay body and the second relay body are staggered in the front-to-back direction, and the first sampling resistor piece and the second sampling resistor piece have a set second interval in the front-to-back direction.

6. The dual-channel metering electric energy meter stand structure according to any one of claims 1 to 4, characterized in that: The first relay body and the second relay body are staggered in the left-right direction.

7. A dual-channel electric energy meter, comprising a meter base structure and an upper cover, characterized in that: The meter base structure is the same as the meter base structure of the dual-channel metering electric energy meter described in any one of claims 1 to 6.

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