WO2023125625A1 - 一种可计量的电磁继电器及其电子式电能表 - Google Patents

一种可计量的电磁继电器及其电子式电能表 Download PDF

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Publication number
WO2023125625A1
WO2023125625A1 PCT/CN2022/142674 CN2022142674W WO2023125625A1 WO 2023125625 A1 WO2023125625 A1 WO 2023125625A1 CN 2022142674 W CN2022142674 W CN 2022142674W WO 2023125625 A1 WO2023125625 A1 WO 2023125625A1
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WIPO (PCT)
Prior art keywords
lead
sampling
housing
sheet
relay according
Prior art date
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PCT/CN2022/142674
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English (en)
French (fr)
Inventor
文志刚
钟叔明
代文广
李方能
Original Assignee
厦门宏发电力电器有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Priority claimed from CN202111659685.7A external-priority patent/CN114360963A/zh
Priority claimed from CN202123430937.7U external-priority patent/CN216900660U/zh
Application filed by 厦门宏发电力电器有限公司 filed Critical 厦门宏发电力电器有限公司
Publication of WO2023125625A1 publication Critical patent/WO2023125625A1/zh

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
    • G01R22/06—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C1/00—Details
    • H01C1/14—Terminals or tapping points or electrodes specially adapted for resistors; Arrangements of terminals or tapping points or electrodes on resistors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/02—Bases; Casings; Covers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/14—Terminal arrangements

Definitions

  • the present disclosure relates to the technical field of electronic meters, in particular to a measurable electromagnetic relay and an electronic energy meter thereof.
  • Electronic watt-hour meter is a kind of electronic instrument equipment. It samples the voltage and current of the user's power supply in real time, and uses a dedicated watt-hour meter integrated circuit to process the sampled voltage and current signal and convert it into a pulse output proportional to the electric energy. Displayed by counter or digital display. Electronic energy meters usually use relays to control the load circuit. As an electronic control device, the relay has a control system (also known as an input circuit) and a controlled system (also known as an output circuit), and is usually used in an automatic control circuit. , it is actually a kind of "automatic switch” that uses a smaller current to control a larger current, and it plays the role of automatic adjustment, safety protection, conversion circuit, etc. in the circuit.
  • a quantifiable electromagnetic relay used in an electronic energy meter in the prior art usually includes a casing, a contact assembly in the casing, and two lead-out pieces connected to the contact assembly in the casing.
  • One of the lead-out pieces is equipped with a manganin sheet as a metering device.
  • the manganin sheet is provided with a sampling pin and connected to the PCB board through a signal line.
  • this kind of relay needs a welding process due to the use of a signal line connection, resulting in a process Complexity, high production cost, low degree of automation and other disadvantages, on the other hand, external magnetic field interference will cause measurement accuracy to decrease.
  • a measurable electromagnetic relay used for electronic energy meters in the prior art uses two-way metering.
  • This two-way metering relay is provided with four lead-out pieces, and each two lead-out pieces form a road and are respectively connected to the corresponding One-way contact assembly of the two-way lead-out piece, one of the two lead-out pieces of each way is provided with a metering device, and one lead-out piece of one way is provided with a section of manganin sheet as a sampling circuit for measurement, A lead-out piece of the other road is equipped with a current transformer as a sampling circuit for metering.
  • the two-way metering relay of this metering mode in the prior art mainly has the following disadvantages: one is that because the metering of one of the roads adopts a current transformer, As a result, the cost of the relay is higher, which affects the competitiveness of the product; secondly, the manganin sheet and the current transformer are connected by signal lines, and the coil leads are also connected by signal lines, resulting in complex production processes and many signal lines. Easy to weld wrong, high labor cost, low degree of automation and other disadvantages.
  • the purpose of this disclosure is to overcome the deficiencies of the prior art and provide a measurable electromagnetic relay and its electronic energy meter.
  • the ability of the relay to measure anti-interference in an alternating magnetic field can be improved; on the other hand , can avoid many disadvantages caused by the connection of signal lines, and has the characteristics of low production cost, easy installation and high degree of automation.
  • a meterable electromagnetic relay including a housing, a PCB board, and a contact assembly protruding from the inside of the housing to the first side of the housing and connected to the housing
  • the two ends of the sampling resistance sheet are provided with two sampling pins protruding in the same direction, which are used to realize the inflow and outflow of current;
  • the PCB board is respectively connected to the sampling pins of the two sampling resistance sheets by plug welding;
  • the sampling In the resistor sheet a through hole is provided along the thickness direction of the board body, so as to offset the induced current generated by the sampling resistor sheet, the sampling pin and the PCB board by using the first closed loop formed by the through hole in the external alternating magnetic field.
  • the induced current generated by the second closed loop in the external alternating magnetic field improves the anti-interference ability of the relay in the alternating magnetic field measurement.
  • the area of the first closed loop is the same as that of the second closed loop, so that the induced current generated by the first closed loop formed by the through hole in the external alternating magnetic field is completely offset by the sampling resistor, the sampling pin and the The induced current generated by the second closed loop surrounded by the PCB board in the external alternating magnetic field.
  • one of the lead-out sheets includes the sampling resistor sheet.
  • each lead-out sheet There are four lead-out pieces protruding from the inside of the housing to the first side of the housing and connected to the contact components in the housing, and the contact components in the housing are two-way; the four lead-out In each of the two lead-out sheets, each two lead-out sheets are respectively connected to a corresponding contact assembly; in each lead-out sheet, one lead-out sheet includes the sampling resistor sheet.
  • the PCB board is connected to the sampling pin by plug welding on the same plane.
  • the housing is also provided with a coil lead-out pin protruding from the housing, and the coil lead-out pin and the sampling pin are respectively connected to the PCB board by plug-welding on the same plane.
  • the two sampling pins in the same lead-out sheet are respectively connected to the top surface of the corresponding sampling resistance sheet.
  • the two sampling pins in the same lead-out piece are respectively connected to the top surface of the corresponding conductive piece.
  • sampling pins are respectively configured as pin-type structures.
  • a first boss is also provided at the connection with the corresponding sampling resistance sheet, and the cross section of the first boss is larger than the cross section of the sampling foot, and the PCB board is placed on the the top surface of the first boss.
  • a layer of solder layer is also coated on the outside of a part corresponding to the upper surface of the first boss.
  • the through hole of the sampling resistance sheet is located on the vertical line between the midpoints of the connecting lines of the two sampling pins.
  • the coil lead-out pins are distributed on the top surface of the housing close to the second side of the housing opposite to the first side of the housing, on both sides of the top surface of the housing close to the second side of the housing.
  • the four lead-out pieces are arranged sequentially along the first side of the housing, wherein the two lead-out pieces in the middle are respectively connected to one contact assembly in the housing by one side of the first side of the housing
  • One of the two lead-out pieces on both sides is wound from the bottom of the housing to the place close to the other lead-out piece, and the other side of the first side of the housing is connected to another contact assembly in the housing .
  • the sampling resistance sheet is a manganin sheet or a constantan sheet.
  • An electronic watt-hour meter includes the above-mentioned measurable electromagnetic relay.
  • a through hole is provided along the thickness direction of the plate body in the sampling resistance sheet, so as to use the first closed loop formed by the through hole to offset the induced current generated in the external alternating magnetic field by the sampling resistance sheet.
  • the second closed loop surrounded by the sampling pin and the PCB board induces current in the external alternating magnetic field, thereby improving the anti-interference ability of the relay in the alternating magnetic field measurement.
  • This structure of the present disclosure is to use the through hole of the sampling resistor sheet to offset the induced current generated in the external alternating magnetic field by the second closed loop surrounded by the sampling resistor sheet, the sampling pin and the PCB board in the external alternating magnetic field.
  • the induced current generated can reduce the influence of alternating electromagnetic field interference on manganese copper measurement accuracy, and improve the anti-interference ability of the relay in alternating magnetic field measurement.
  • each two lead-out sheets are respectively connected to the corresponding one-way contact assembly; in each lead-out sheet, each lead-out sheet includes a section made of high-resistivity material.
  • the plate-shaped sampling resistor and the conductive sheet connected to both ends of the sampling resistor.
  • the two lead-out sheets used for sampling respectively adopt sampling resistor sheets, and the sampling pins of the two sampling resistor sheets are respectively plugged and welded to the PCB boards.
  • the structure of the present disclosure is to use two-way sampling resistors as the sampling circuit for measurement, and the two-way sampling resistors are set in the same direction and fixed with the sampling pins directly plugged and welded with the PCB board, avoiding the signal line of the prior art
  • Many disadvantages caused by the connection have the characteristics of low production cost, easy installation and high degree of automation.
  • FIG. 1 is a schematic diagram of a three-dimensional structure of a meterable electromagnetic relay according to Embodiment 1 of the present disclosure
  • FIG. 2 is a front view of a scalable electromagnetic relay according to Embodiment 1 of the present disclosure
  • FIG. 3 is a top view of a scalable electromagnetic relay according to Embodiment 1 of the present disclosure
  • Fig. 4 is a left side view of the meterable electromagnetic relay of Embodiment 1 of the present disclosure
  • Fig. 5 is a right side view of the quantifiable electromagnetic relay of Embodiment 1 of the present disclosure
  • Fig. 6 is an enlarged schematic diagram of part A in Fig. 2;
  • FIG. 7 is a schematic diagram of a three-dimensional structure of a measurable electromagnetic relay (without a PCB board) according to Embodiment 1 of the present disclosure
  • Fig. 8 is the front view of the quantifiable electromagnetic relay (without PCB board) of Embodiment 1 of the present disclosure
  • Fig. 9 is a top view of a meterable electromagnetic relay (without PCB board) according to Embodiment 1 of the present disclosure.
  • Fig. 10 is the left side view of the quantifiable electromagnetic relay (without PCB board) of Embodiment 1 of the present disclosure
  • Fig. 11 is the right side view of the quantifiable electromagnetic relay (without PCB board) of Embodiment 1 of the present disclosure
  • Fig. 12 is a schematic diagram of the three-dimensional structure of one of the lead-out pieces of the meterable electromagnetic relay according to Embodiment 1 of the present disclosure
  • Fig. 13 is a front view of one of the lead-out pieces of the meterable electromagnetic relay according to Embodiment 1 of the present disclosure
  • FIG. 14 is a schematic diagram of a three-dimensional structure of a meterable electromagnetic relay (without a PCB board) according to Embodiment 2 of the present disclosure
  • Fig. 15 is the front view of the quantifiable electromagnetic relay (without PCB board) of Embodiment 2 of the present disclosure
  • Fig. 16 is a top view of a meterable electromagnetic relay (without PCB board) according to Embodiment 2 of the present disclosure
  • Fig. 17 is the back view of the quantifiable electromagnetic relay (without PCB board) of Embodiment 2 of the present disclosure
  • Fig. 18 is a schematic diagram of a three-dimensional structure of a meterable electromagnetic relay (without a PCB board and rotated at an angle) according to Embodiment 2 of the present disclosure;
  • FIG. 19 is a schematic diagram of a three-dimensional structure of a two-way metering relay according to Embodiment 3 of the present disclosure.
  • Fig. 20 is a front view of a two-way metering relay according to Embodiment 3 of the present disclosure.
  • Fig. 21 is a top view of a two-way metering relay in Embodiment 3 of the present disclosure.
  • Fig. 22 is a left side view of the two-way metering relay of the third embodiment of the present disclosure.
  • Fig. 23 is a right side view of the two-way metering relay of the third embodiment of the present disclosure.
  • Fig. 24 is a schematic diagram of a three-dimensional structure of a two-way metering relay (without a PCB board) in Embodiment 3 of the present disclosure
  • Fig. 25 is a front view of a two-way metering relay (without a PCB board) in Embodiment 3 of the present disclosure
  • Fig. 26 is a top view of a two-way metering relay (without a PCB board) in Embodiment 3 of the present disclosure
  • Fig. 27 is a left view of a two-way metering relay (without a PCB board) in Embodiment 3 of the present disclosure
  • Fig. 28 is the right view of the two-way metering relay (without PCB board) of the third embodiment of the present disclosure
  • Fig. 29 is a schematic diagram of the three-dimensional structure of one of the lead-out pieces of the two-way metering relay according to the third embodiment of the present disclosure.
  • Fig. 30 is a front view of one of the lead-out pieces of the two-way metering relay according to Embodiment 3 of the present disclosure.
  • Fig. 31 is a front view of a two-way metering relay according to Embodiment 4 of the present disclosure.
  • Fig. 32 is an enlarged schematic view of part B in Fig. 31;
  • Fig. 33 is a schematic diagram of a three-dimensional structure of a two-way metering relay (without a PCB board) according to Embodiment 4 of the present disclosure
  • Fig. 34 is a three-dimensional structural schematic diagram of one of the lead-out pieces of the two-way metering relay according to Embodiment 4 of the present disclosure.
  • Fig. 35 is a front view of one of the lead-out pieces of the two-way metering relay according to Embodiment 4 of the present disclosure.
  • Example embodiments will now be described more fully with reference to the accompanying drawings.
  • Example embodiments may, however, be embodied in many forms and should not be construed as limited to the embodiments set forth herein.
  • relative terms such as “upper” and “lower” are used in this specification to describe the relative relationship of one component of an icon to another component, these terms are used in this specification only for convenience, for example, according to the drawings Directions for the example described. It will be appreciated that if the illustrated device is turned over so that it is upside down, then elements described as being “upper” will become elements that are “lower”.
  • Other relative terms, such as “top” and “bottom” also have similar meanings.
  • When a structure is "on” another structure it may mean that a structure is integrally formed on another structure, or that a structure is “directly” placed on another structure, or that a structure is “indirectly” placed on another structure through another structure. other structures.
  • a meterable electromagnetic relay of the present disclosure is a two-way metering electromagnetic relay, which includes a housing 1, a PCB board 2, and a housing extending from the inside of the housing to the first side of the housing.
  • the lead-out piece 3 connected with the contact assembly in the housing, wherein, there are four lead-out pieces 3, and the four lead-out pieces are arranged sequentially along the first side of the housing 1, that is, the lead-out piece 33, the lead-out piece 31.
  • the lead-out piece 32 and the lead-out piece 34 are arranged sequentially along the first side of the casing 1, wherein the two lead-out pieces 31 and 32 in the middle are separated from one side of the first side of the casing and inside the casing respectively.
  • the lead-out sheet 31 includes a plate-shaped sampling resistor 4 made of a high-resistivity material and connected to the sampling resistor 4.
  • the conductive sheet 6 at the end, in the lead-out sheet 33 and the lead-out sheet 34, the lead-out sheet 33 includes a section of plate-shaped sampling resistance sheet 4 made of a high-resistivity material and the conductive sheet 6 connected to the two ends of the sampling resistance sheet 4,
  • the structure of the sampling resistor 4 of the lead-out sheet 31 is the same as that of the sample resistor 4 of the lead-out sheet 33, which is worth explaining. What is more important is that the lead-out piece 33 is an outer lead-out piece, and the lead-out piece 33 is also inserted into the housing through the inner lead-out piece 331; two sampling pins 41 protruding in the same direction are provided at both ends of the sampling resistance piece 4 for realizing current flow.
  • the inflow and outflow of the PCB board 2 are respectively connected to the two ends sampling pins 41 of the two sampling resistors (i.e. the sampling resistor 4 of the lead sheet 31 and the sample resistor 4 of the lead sheet 33) by plug welding;
  • a through hole 42 is respectively arranged along the thickness direction of the plate body, so as to offset the induced current generated by the first closed loop S1 formed by the through hole 42 in the external alternating magnetic field.
  • the second closed loop S2 surrounded by the sampling resistor 4, the sampling pin 41 and the PCB board 2 generates an induced current in the external alternating magnetic field (as shown in Figure 6), thereby improving the anti-interference degree of the relay in the alternating magnetic field measurement ability.
  • the two sampling pins 41 in the same sampling resistor are respectively connected to the top surfaces of the two ends of the corresponding sampling resistor 4 .
  • the two sampling pins in the same sampling resistor sheet can also be respectively connected to the top surface of the conductive sheet outside the two ends of the corresponding sampling resistor sheet.
  • the PCB board 2 is plugged and welded to the sampling pins 41 of the two sampling resistors 4 on the same plane.
  • the housing 1 is also provided with a coil lead-out pin 5 protruding from the housing, and the coil lead-out pin 5 and the sampling pins 41 of the two sampling resistors 4 are connected to the PCB board 2 respectively. Connected by socket welding on the same plane.
  • sampling pins 41 of the two sampling resistors 4 are respectively configured as pin-type structures.
  • a first boss 43 is also provided at the connection with the corresponding sampling resistor 4, and the cross section of the first boss 43 is larger than that of the sampling pin 41.
  • the cross section of the PCB board 2 rides on the top surface of the first boss 43 .
  • a solder layer 44 is coated on the surface of a part of the sampling foot 41 corresponding to the upper surface of the first boss 43 .
  • the through hole 42 of the sampling resistor 4 is located on the vertical line of the midpoint of the line connecting the two sampling pins 41 .
  • the coil lead-out pins 5 are distributed on the top surface of the casing close to the second side of the casing, the second side of the casing is opposite to the first side of the casing 1, and close to the casing 1
  • the two sides of the top surface of the housing on the second side of the body 1 are also respectively provided with second bosses 11, and the height position of the top surface of the second boss 11 is the same as that of the top surface of the first boss 43.
  • the height positions are equal; the PCB board 2 rides on the top surface of the first boss 43 and the top surface of the second boss 11 .
  • the sampling resistor 4 is a manganin sheet.
  • An electronic watt-hour meter of the present disclosure includes the above-mentioned two-way metering relay.
  • each lead-out piece includes a section of plate-shaped sampling resistance piece 4 made of high-resistivity material.
  • the sampling resistance sheet 4 is provided with two sampling pins 41 protruding in the same direction for realizing the inflow and outflow of current;
  • the PCB board 2 is respectively connected to the sampling pins 41 of the two sampling resistance sheets 4 by plug welding ;
  • a through hole 42 is respectively provided along the thickness direction of the plate body, so as to utilize the induced current generated by the first closed loop S1 formed by the through hole 42 in the external alternating magnetic field Offset the induced current generated in the external alternating magnetic field by the second closed loop S2 surrounded by the sampling resistor 4, the sampling pin 41 and the PCB board 2, thereby improving the measurement anti-interference ability of the relay in the alternating magnetic field.
  • two-way sampling resistors 4 are used as sampling circuits for metering, and the two-way sampling resistors 4 are set with sampling pins 41 in the same direction and PCB board 2 are directly plugged and welded to be fixed, which avoids the signal line connection of the prior art.
  • the many disadvantages produced have the characteristics of low production cost, easy installation, and high degree of automation.
  • This disclosure uses the through hole 42 of the sampling resistor 4 to offset the induced current generated by the sampling resistor 4 and the sampling pin 41 in the external alternating magnetic field.
  • the induced current generated by the second closed loop surrounded by the PCB board 2 in the external alternating magnetic field can reduce the influence of the alternating electromagnetic field on the measurement accuracy of manganese copper, and improve the anti-interference ability of the relay in the alternating magnetic field measurement.
  • a meterable electromagnetic relay and its electronic energy meter of the present disclosure are different from Embodiment 1 in that the electromagnetic relay is a metering electromagnetic relay with only two outlets.
  • the lead-out sheet 33 includes a plate-shaped sampling resistor 4 made of high-resistivity material.
  • the top surface of the housing is not provided with a second boss 11, but a third boss 12 is provided at the position of the coil lead-out pin 5, and the PCB board 2 rests on the The top surface of the first boss 43 and the top surface of the third boss 12 .
  • a two-way metering relay for electronic energy meters in the prior art usually includes a housing, a contact assembly in the housing, and a lead-out piece connected to the corresponding contact assembly in the housing.
  • This two-way metering relay is equipped with four lead-out pieces, each two lead-out pieces form one circuit and are respectively connected to the corresponding one-way contact assembly.
  • one of the two lead-out pieces of each circuit is provided with a metering device.
  • One of the lead-out pieces of one of the roads is provided with a section of manganese-copper sheet as a sampling circuit for metering, and one lead-out piece of the other road is equipped with a current transformer as a sampling circuit for metering.
  • the two-way metering relay of this metering mode in the prior art The main disadvantages are as follows: first, because the measurement of one of the roads uses a current transformer, the cost of the relay is relatively high, which affects the competitiveness of the product; second, the manganin sheet and the current transformer are connected by signal lines, In addition, the coil leads are also connected by signal wires, resulting in complex production process, easy welding error of signal wires, high labor cost, and low degree of automation.
  • the disclosure also provides a two-way metering relay and its electronic energy meter. Through structural improvement, many disadvantages caused by the connection of signal lines are avoided, and it has the characteristics of low production cost, easy installation, and high degree of automation. The ability to measure the immunity to interference in an alternating magnetic field.
  • a two-way metering relay including a housing, a PCB board, and a contact assembly that protrudes from the housing to the first side of the housing and is connected to the contact assembly in the housing.
  • Connected lead-out pieces wherein, there are four lead-out pieces, and each two lead-out pieces are respectively connected to a corresponding contact assembly; in each lead-out piece, there is one lead-out piece including a section made of high-resistivity material.
  • the board-type sampling resistor and the conductive sheet connected to both ends of the sampling resistor are provided with two sampling pins protruding in the same direction at the two ends of the sampling resistor to realize the inflow and outflow of current; the PCB The board is respectively connected with the sampling pins of the two lead-out pieces by plug welding.
  • a through hole is respectively arranged along the thickness direction of the plate body, so as to offset the induced current generated by the sampling resistor in the first closed loop formed by the through hole in the external alternating magnetic field.
  • the second closed loop surrounded by the sampling pin and the PCB board induces current in the external alternating magnetic field, thereby improving the anti-interference ability of the relay in the alternating magnetic field measurement.
  • the PCB board is connected to the sampling pins of the two lead-out sheets by plug welding on the same plane.
  • the housing is also provided with coil lead-out pins protruding from the shell, and the coil lead-out pins and the sampling pins of the two lead-out sheets are respectively connected to the PCB board by plug-welding on the same plane.
  • the two sampling pins in the same lead-out sheet are respectively connected to the top surface of the corresponding sampling resistance sheet.
  • the two sampling pins in the same lead are respectively connected to the top surface of the corresponding conductive sheet.
  • Each of the sampling pins is respectively configured as a pin-type structure.
  • a first boss is also provided at the connection with the corresponding lead-out piece, and the cross section of the first boss is larger than the cross section of the sampling foot, and the PCB board is placed on the Describe the top surface of the first boss.
  • a layer of solder layer is also coated on the outside of a part corresponding to the upper surface of the first boss.
  • the through hole of the sampling resistance sheet is located on the vertical line between the midpoints of the connecting lines of the two sampling pins.
  • the through hole of the sampling resistance sheet is located at the very center of the sampling resistance sheet.
  • the coil lead-out pins are distributed on the top surface of the housing close to the second side of the housing opposite to the first side of the housing, on both sides of the top surface of the housing close to the second side of the housing.
  • the four lead-out pieces are arranged sequentially along the first side of the housing, wherein the two lead-out pieces in the middle are respectively connected to one contact assembly in the housing by one side of the first side of the housing
  • One of the two lead-out pieces on both sides is wound from the bottom of the housing to the place close to the other lead-out piece, and the other side of the first side of the housing is connected to another contact assembly in the housing .
  • the sampling resistance sheet is a manganin sheet or a constantan sheet.
  • An electronic watt-hour meter includes the above-mentioned two-way metering relay.
  • each lead-out piece includes a plate-type sampling resistance piece made of high-resistivity material.
  • the sampling resistance piece is provided with two sampling pins protruding in the same direction for realizing The inflow and outflow of current; the PCB board is respectively connected to the sampling pins of the two lead-out sheets by plug welding.
  • two-way sampling resistors are used as the sampling circuit for measurement, and the two-way sampling resistors are set in the same direction and the sampling pins are directly plugged and welded with the PCB board, which avoids many disadvantages caused by the connection of signal lines in the prior art , has the characteristics of low production cost, easy installation and high degree of automation.
  • a through hole is respectively arranged along the thickness direction of the plate body, so that the first closed loop formed by the through hole can generate The induced current offsets the induced current generated in the external alternating magnetic field by the second closed loop surrounded by the sampling resistor, sampling pin and PCB board, thereby improving the anti-interference ability of the relay in the alternating magnetic field measurement.
  • the disclosure utilizes the induced current generated by the through hole of the sampling resistor sheet in the external alternating magnetic field to offset the induced current generated by the second closed loop surrounded by the sampling resistor sheet, the sampling pin and the PCB board in the external alternating magnetic field, which can Reduce the impact of alternating electromagnetic field interference on manganese copper measurement accuracy, and improve the anti-interference ability of relays in alternating magnetic field measurement.
  • a two-way metering relay of the present disclosure includes a housing 1, a PCB board 2, and a contact assembly protruding from the inside of the housing to the first side of the housing and connected to the housing.
  • lead-out pieces 3 wherein there are four lead-out pieces 3, and the four lead-out pieces are arranged sequentially along the first side of the housing 1, namely lead-out piece 33, lead-out piece 31, lead-out piece 32, lead-out piece 34 Arranged in sequence along the first side of the housing 1, wherein the two lead-out pieces 31, 32 in the middle are respectively connected to one contact assembly in the housing by one side of the first side of the housing, and are in the One lead-out piece 33 of the two lead-out pieces on both sides is wound from the bottom of the housing to the place close to the other lead-out piece 34, and the other side of the first side of the housing is connected to another contact assembly in the housing.
  • the lead-out sheet 31 comprises a section of plate-type sampling resistance sheet 4 that adopts a high resistivity material to be made and the conductive sheet 6 that is connected to the sampling resistance sheet 4 two ends, in the lead-out sheet 33,
  • the lead-out sheet 33 comprises a plate-type sampling resistance sheet 4 made of a high-resistivity material and the conductive sheet 6 connected to the two ends of the sampling resistance sheet 4, below the lead-out sheet 33 (as shown in Figure 11 and Fig.
  • the structure of the sampling resistor sheet 4 of the lead-out sheet 31 is the same as the structure of the sampling resistor sheet 4 of the lead-out sheet 33, it is worth noting that the lead-out sheet 33 is an external lead-out sheet,
  • the lead-out piece 33 is also inserted into the housing through the inner lead-out piece 331; two sampling pins 41 protruding in the same direction are provided at the two ends of the sampling resistance piece 4 to realize the inflow and outflow of current; the PCB board 2 are respectively connected to the sampling pins 41 at both ends of the two sampling resistors (that is, the sampling resistor 4 of the lead-out sheet 31 and the sampling resistor 4 of the lead-out sheet 33) by plug welding.
  • the two sampling pins 41 in the same sampling resistor are respectively connected to the top surfaces of the two ends of the corresponding sampling resistor 4 .
  • the two sampling pins in the same sampling resistor sheet can also be respectively connected to the top surface of the conductive sheet outside the two ends of the corresponding sampling resistor sheet.
  • the PCB board 2 is plugged and welded to the sampling pins 41 of the two sampling resistors 4 on the same plane.
  • the housing 1 is also provided with a coil lead-out pin 5 protruding from the housing, and the coil lead-out pin 5 and the sampling pins 41 of the two sampling resistors 4 are connected to the PCB board 2 respectively. Connected by socket welding on the same plane.
  • sampling pins 41 of the two sampling resistors 4 are respectively configured as pin-type structures.
  • a first boss 43 is also provided at the connection with the corresponding sampling resistor 4, and the cross section of the first boss 43 is larger than that of the sampling pin 41.
  • the cross section of the PCB board 2 rides on the top surface of the first boss 43 .
  • a solder layer 44 is coated on the surface of a part of the sampling foot 41 corresponding to the upper surface of the first boss 43 .
  • the through hole 42 of the sampling resistor 4 is located on the vertical line of the midpoint of the line connecting the two sampling pins 41 .
  • the coil lead-out pins 5 are distributed on the top surface of the housing close to the second side of the housing opposite to the first side of the housing 1, and on the second side close to the housing 1
  • the two sides of the top surface of the casing are respectively provided with second bosses 11, and the height position of the top surface of the second boss 11 is flush with the height position of the top surface of the first boss 43;
  • the PCB board 2 rides on the top surface of the first boss 43 and the top surface of the second boss 11 .
  • the sampling resistance sheet 4 is a manganin sheet
  • the conductive sheet 6 is a copper sheet.
  • An electronic watt-hour meter of the present disclosure includes the above-mentioned two-way metering relay.
  • a two-way metering relay and its electronic energy meter of the present disclosure adopts one lead-out piece in each lead-out piece including a plate-type sampling resistance piece 4 made of a high-resistivity material. Two sampling pins 41 protruding in the same direction are provided on the resistive sheet 4 for realizing the inflow and outflow of current; the PCB board 2 is respectively plugged and welded with the sampling pins 41 of the two lead-out sheets.
  • two-way sampling resistors are used as the sampling circuit for measurement, and the two-way sampling resistors are set in the same direction and the sampling pins are directly plugged and welded with the PCB board, which avoids many disadvantages caused by the connection of signal lines in the prior art , has the characteristics of low production cost, easy installation and high degree of automation.
  • a two-way metering relay and its electronic watt-hour meter of the present disclosure are different from Embodiment 3 in that the sampling resistance sheet 4 of the lead-out sheet 31 and the sampling of the lead-out sheet 33 are In the resistance sheet 4, a through hole 42 is respectively arranged along the thickness direction of the plate body, so as to offset the induced current generated by the sampling resistance sheet 4 by using the first closed loop S1 formed by the through hole 42 in the external alternating magnetic field. 1.
  • the second closed loop S2 surrounded by the sampling pin 41 and the PCB board 2 generates an induced current (as shown in FIG. 14 ) in the external alternating magnetic field, thereby improving the anti-interference ability of the relay in the alternating magnetic field measurement.
  • a two-way metering relay and its electronic energy meter of the present disclosure adopts the two sampling resistance sheets 4, which are respectively provided with a through hole 42 along the thickness direction of the plate body, so as to utilize the through hole 42 to
  • the induced current generated by the formed first closed loop S1 in the external alternating magnetic field cancels the induced current generated by the second closed loop S2 surrounded by the sampling resistor 4, the sampling pin 41 and the PCB board 2 in the external alternating magnetic field , so as to improve the anti-interference ability of the relay in the alternating magnetic field measurement.
  • the induced current generated by the through hole 42 of the sampling resistor sheet in the external alternating magnetic field is used to offset the induced current generated by the second closed loop surrounded by the sampling resistor sheet 4, the sampling pin 41 and the PCB board 2 in the external alternating magnetic field.
  • the induced current can reduce the influence of alternating electromagnetic field interference on the measurement accuracy of manganese copper, and improve the anti-interference ability of the relay in the measurement of alternating magnetic field.

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Abstract

一种可计量的电磁继电器，包括壳体（1）、PCB板（2）以及由壳体（1）内向壳体（1）的第一侧外伸出的且与壳体（1）内的触点组件相连接的两个引出片（33，34）；这两个引出片（33，34）中的其中一个引出片（33）包括一段采用高电阻率材料制作而成的板体状的采样电阻片（4）以及连接在该采样电阻片（4）两端部的导电片（6），在该引出片（33）上位于采样电阻片（4）的两端部位置设有同方向伸出的两个取样脚（41），用于实现电流的流入和流出；PCB板（2）分别与两个取样脚（41）插接焊接相连接；该采样电阻片（4）中，沿着板体的厚度方向设有一个通孔（42），以利用该通孔（42）形成的第一封闭环（S1）在外部交变磁场中产生的感应电流抵消由采样电阻片（4）、取样脚（41）和PCB板（2）所围成的第二封闭环（S2）在外部交变磁场中产生的感应电流，从而提升继电器在交变磁场计量抗干扰度能力。还提供一种电子式电能表，包括上述电磁继电器。

Description

一种可计量的电磁继电器及其电子式电能表
交叉引用
本公开要求于2021年12月30日提交的申请号为202111659685.7和202123430937.7的中国专利申请的优先权，该中国专利申请的全部内容通过引用全部并入本文。
技术领域
本公开涉及电子仪表技术领域，特别是涉及一种可计量的电磁继电器及其电子式电能表。
背景技术
电子式电能表是一种电子仪表设备，它通过对用户供电电压和电流实时采样，采用专用的电能表集成电路，对采样电压和电流信号进行处理并转换成与电能成正比的脉冲输出，再通过计度器或数字显示器显示。电子式电能表内通常是采用继电器对负载电路进行控制，继电器作为一种电子控制器件，具有控制***(又称输入回路)和被控制***(又称输出回路)，通常应用于自动控制电路中，它实际上是用较小的电流去控制较大电流的一种“自动开关”，其在电路中起着自动调节、安全保护、转换电路等作用。现有技术的一种用于电子式电能表的可计量的电磁继电器通常包括壳体、壳体内的触点组件以及和壳体内的触点组件相连接的两个引出片，两个引出片中的其中一个引出片设有锰铜片作为计量装置，锰铜片上设有采样脚并通过信号线与PCB板相连接，这种继电器一方面是由于采用信号线连接，需要有焊接工序，造成工序复杂，制作成本高，自动化程度低等弊端，另一方面，外部磁场干扰会造成计量精度降低。
另外，现有技术的一种用于电子式电能表的可计量的电磁继电器是采用两路计量，这种两路计量继电器设有四个引出片，每两个引出片组成一路并分别连接对应的一路触点组件，在两路引出片中，每一路的两个引出片中的其中一个引出片设有计量装置，其中一路的一个引出片中设有一段锰铜片作为采样电路进行计量，另一路的一个引出片则装有电流互感器作为采样电路进行计量，现有技术的这种计量模式的两路计量继电器主要存在如下弊端：一是，由于其中一路的计量采用了电流互感器，致使继电器的成本较高，影响了产品的竞争力；二是，锰铜片和电流互感器均采用信号线进行连接，加上线圈引出也采用信号线连接，造成了生产工艺复杂，信号线多容易焊错，人工成本高，自动化程度低等弊端。
发明内容
本公开的目的在于克服现有技术的不足，提供一种可计量的电磁继电器及其电子式 电能表，通过结构改进，一方面，能够提升继电器在交变磁场计量抗干扰度能力；另一方面，可以避免了信号线连接所产生的诸多弊端，具有制作成本低、便于安装、自动化程度高的特点。
本公开解决其技术问题所采用的技术方案是：一种可计量的电磁继电器，包括壳体、PCB板以及由壳体内向壳体的第一侧外伸出的且与壳体内的触点组件相连接的两个引出片；所述两个引出片中的其中一个引出片包括一段采用高电阻率材料制作而成的板体状的采样电阻片以及连接在采样电阻片两端的导电片，在采样电阻片的两端设有同方向伸出的两个取样脚，用于实现电流的流入和流出；所述PCB板分别与两个采样电阻片的取样脚插接焊接相连接；所述采样电阻片中，沿着板体的厚度方向设有一个通孔，以利用该通孔所形成的第一封闭环在外部交变磁场中产生的感应电流抵消由采样电阻片、取样脚和PCB板所围成的第二封闭环在外部交变磁场中产生的感应电流，从而提升继电器在交变磁场计量抗干扰度能力。
所述第一封闭环的面积与第二封闭环的面积相同，以利用该通孔所形成的第一封闭环在外部交变磁场中产生的感应电流去完全抵消由采样电阻片、取样脚和PCB板所围成的第二封闭环在外部交变磁场中产生的感应电流。
所述由壳体内向壳体的第一侧外伸出的且与壳体内的触点组件相连接的引出片为两个，所述壳体内的触点组件为一路；所述两个引出片中，其中一个引出片包括所述采样电阻片。
所述由壳体内向壳体的第一侧外伸出的且与壳体内的触点组件相连接的引出片为四个，所述壳体内的触点组件为二路；所述四个引出片中，每两个引出片分别连接对应的一路触点组件；在每一路引出片中，各有一个引出片包括所述采样电阻片。
所述PCB板在同一平面上与所述取样脚插接焊接相连接。
所述壳体还设有从壳体内伸出的线圈引出脚，所述线圈引出脚和所述取样脚分别与所述PCB板在同一平面上插接焊接相连接。
所述同一引出片中的两个取样脚分别连接在所对应的采样电阻片的的顶面。
所述同一引出片中的两个取样脚分别连接在所对应的导电片的顶面。
所述取样脚分别设为插针式结构。
所述取样脚中，在与对应的采样电阻片的相连接处还设有第一凸台，且所述第一凸台的横截面大于所述取样脚的横截面，所述PCB板搭在所述第一凸台的顶面。
所述取样脚中，在对应于第一凸台的上面的其中一部分的外面还涂覆一层焊锡层。
所述采样电阻片的通孔位于两个取样脚连线的中点的垂直线上。
所述线圈引出脚分布在靠近与所述壳体的第一侧相对的壳体的第二侧的壳体的顶面，在靠近所述壳体的第二侧的壳体的顶面的两边还分别设有第二凸台，且所述第二凸台的顶面的高度位置与所述第一凸台的顶面的高度位置相平齐；所述PCB板搭在所述第一凸台的顶面和所述第二凸台的顶面上。
所述四个引出片沿着所述壳体的第一侧顺序排列，其中，处于中间的两个引出片分别由所述壳体的第一侧的一边与壳体内的一路触点组件相连接，处于两侧的两个引出片中的一个引出片由壳体的底部绕至靠近另一个引出片处由所述壳体的第一侧的另一边与壳体内的另一路触点组件相连接。
所述采样电阻片为锰铜片或康铜片。
一种电子式电能表，包括如上所述的可计量的电磁继电器。
与现有技术相比较，本公开的有益效果是：
本公开在所述采样电阻片中，沿着板体的厚度方向设有一个通孔，以利用该通孔所形成的第一封闭环在外部交变磁场中产生的感应电流抵消由采样电阻片、取样脚和PCB板所围成的第二封闭环在外部交变磁场中产生的感应电流，从而提升继电器在交变磁场计量抗干扰度能力。本公开的这种结构，是利用采样电阻片的通孔在外部交变磁场中产生的感应电流抵消由采样电阻片、取样脚和PCB板所围成的第二封闭环在外部交变磁场中产生的感应电流，可以降低交变电磁场干扰锰铜计量精度影响，升继电器在交变磁场计量抗干扰度能力。
进一步的，本公开由于采用了在四个引出片中，每两个引出片分别连接对应的一路触点组件；在每一路引出片中，各有一个引出片包括一段采用高电阻率材料制作而成的板体状的采样电阻片以及连接在采样电阻片两端的导电片。本公开的这种结构，两个用来实现采样的引出片分别采用采样电阻片，且两个采样电阻片的取样脚分别与所述PCB板分别插接焊接相连接。本公开的这种结构，是利用两路采样电阻片来作为采样电路进行计量，且两路采样电阻片设置同方向取样脚与PCB板直接插接焊接相固定，避免了现有技术的信号线连接所产生的诸多弊端，具有制作成本低、便于安装、自动化程度高的特点。
以下结合附图及实施例对本公开作进一步详细说明；但本公开的一种可计量的电磁继电器及其电子式电能表不局限于实施例。
附图说明
图1是本公开的实施例一的可计量的电磁继电器的立体构造示意图；
图2是本公开的实施例一的可计量的电磁继电器的主视图；
图3是本公开的实施例一的可计量的电磁继电器的俯视图；
图4是本公开的实施例一的可计量的电磁继电器的左视图；
图5是本公开的实施例一的可计量的电磁继电器的右视图；
图6是图2中的A部放大示意图；
图7是本公开的实施例一的可计量的电磁继电器(未装PCB板)的立体构造示意图；
图8是本公开的实施例一的可计量的电磁继电器(未装PCB板)的主视图；
图9是本公开的实施例一的可计量的电磁继电器(未装PCB板)的俯视图；
图10是本公开的实施例一的可计量的电磁继电器(未装PCB板)的左视图；
图11是本公开的实施例一的可计量的电磁继电器(未装PCB板)的右视图；
图12是本公开的实施例一的可计量的电磁继电器的其中一个引出片的立体构造示意图；
图13是本公开的实施例一的可计量的电磁继电器的其中一个引出片的主视图；
图14是本公开的实施例二的可计量的电磁继电器(未装PCB板)的立体构造示意图；
图15是本公开的实施例二的可计量的电磁继电器(未装PCB板)的主视图；
图16是本公开的实施例二的可计量的电磁继电器(未装PCB板)的俯视图；
图17是本公开的实施例二的可计量的电磁继电器(未装PCB板)的后视图；
图18是本公开的实施例二的可计量的电磁继电器(未装PCB板且转动一个角度)的立体构造示意图；
图19是本公开的实施例三的两路计量继电器的立体构造示意图；
图20是本公开的实施例三的两路计量继电器的主视图；
图21是本公开的实施例三的两路计量继电器的俯视图；
图22是本公开的实施例三的两路计量继电器的左视图；
图23是本公开的实施例三的两路计量继电器的右视图；
图24是本公开的实施例三的两路计量继电器(未装PCB板)的立体构造示意图；
图25是本公开的实施例三的两路计量继电器(未装PCB板)的主视图；
图26是本公开的实施例三的两路计量继电器(未装PCB板)的俯视图；
图27是本公开的实施例三的两路计量继电器(未装PCB板)的左视图；
图28是本公开的实施例三的两路计量继电器(未装PCB板)的右视图；
图29是本公开的实施例三的两路计量继电器的其中一个引出片的立体构造示意图；
图30是本公开的实施例三的两路计量继电器的其中一个引出片的主视图；
图31是本公开的实施例四的两路计量继电器的主视图；
图32是图31中的B部放大示意图；
图33是本公开的实施例四的两路计量继电器(未装PCB板)的立体构造示意图；
图34是本公开的实施例四的两路计量继电器的其中一个引出片的立体构造示意图；
图35是本公开的实施例四的两路计量继电器的其中一个引出片的主视图。
具体实施方式
现在将参考附图更全面地描述示例实施方式。然而，示例实施方式能够以多种形式实施，且不应被理解为限于在此阐述的实施方式。虽然本说明书中使用相对性的用语，例如“上”、“下”来描述图标的一个组件对于另一组件的相对关系，但是这些术语用于本说明书中仅出于方便，例如根据附图中所述的示例的方向。能理解的是，如果将图标的装置翻转使其上下颠倒，则所叙述在“上”的组件将会成为在“下”的组件。其他相对性的用语，例如“顶”、“底”等也作具有类似含义。当某结构在其它结构“上”时，有可能是指某结构一体形成于其它结构上，或指某结构“直接”设置在其它结构上，或指某结构通过另一结构“间接”设置在其它结构上。
用语“一个”、“一”、“该”和“所述”用以表示存在一个或多个要素/组成部分/等；用语“包括”和“具有”用以表示开放式的包括在内的意思并且是指除了列出的要素/组成部分/等之外还可存在另外的要素/组成部分/等；用语“第一”、“第二”等仅作为标记使用，不是对其对象的数量限制。
实施例一
参见图1至图13所示，本公开的一种可计量的电磁继电器，为两路计量电磁继电器，其包括壳体1、PCB板2以及由壳体内向壳体的第一侧外伸出的且与壳体内的触点组件相连接的引出片3，其中，引出片3为四个，四个引出片沿着所述壳体1的第一侧顺序排列，即引出片33、引出片31、引出片32、引出片34沿着所述壳体1的第一侧顺序排列，其中，处于中间的两个引出片31、32分别由所述壳体的第一侧的一边与壳体内的一路触点组件相连接，处于两侧的两个引出片中的一个引出片33由壳体的底部绕至靠近另一个引出片34处由所述壳体的第一侧的另一边与壳体内的另一路触点组件相连接；在引出片31、引出片32中，引出片31包括一段采用高电阻率材料制作而成的板体状的采样电阻片4以及连接在采样电阻片4两端的导电片6，在引出片33、引出片34中，引出片33包括一段采用高电阻率材料制作而成的板体状的采样电阻片4以及连接在采样电阻片4两端的导电片6，以下以引出片33(如图12、图13所示)来具体说明采样电阻片4的结构，引出片31的采样电阻片4的结构与引出片33的采样电阻片4的结构相同，值得说明的是，引出片33为外引出片，引出片33还通过内引出片331接入壳体内；在采样电阻片4的两端设有同方向伸出的两个取样脚41，用于实现电流的流入和流出；所述PCB板2分别与两个采样电阻片(即引出片31的采样电阻片4和引出片33的采样电阻片4)的两端取样脚41插接焊接相连接；所述两个采样电阻片4中，分别沿着板体的厚度方向设有一个通孔42，以利用该通孔42所形成的第一封闭环S1在外部交变磁场中产生的感应电流抵消由采样电阻片4、取样脚41和PCB板2所围成的第二封闭环S2在外部交变磁场中产生的感应电流(如图6所示)，从而提升继电器在交变磁场计量抗干扰度能力。根据电磁感应定律 可知：
Figure PCTCN2022142674-appb-000001
其中
Figure PCTCN2022142674-appb-000002
为穿过闭合回路的磁通量，t为时间，B为磁感应强度，S为垂直于磁场方向的面积；当将通孔42所形成的第一封闭环S1的面积设置成采样电阻片4、取样脚41和PCB板2所围成的第二封闭环S2的面积时，则可以完全抵消外部的磁干扰。
本实施例中，所述同一采样电阻片中的两个取样脚41分别连接在所对应的采样电阻片4的两端的端内的顶面。
当然，同一采样电阻片中的两个取样脚也可以分别连接在所对应的采样电阻片的两端的端外的导电片的顶面。
本实施例中，所述PCB板2在同一平面上与所述两个采样电阻片4的取样脚41插接焊接相连接。
本实施例中，所述壳体1还设有从壳体内伸出的线圈引出脚5，所述线圈引出脚5和所述两个采样电阻片4的取样脚41分别与所述PCB板2在同一平面上插接焊接相连接。
本实施例中，所述两个采样电阻片4中的各取样脚41分别设为插针式结构。
本实施例中，所述取样脚41中，在与对应的采样电阻片4的相连接处还设有第一凸台43，且所述第一凸台43的横截面大于所述取样脚41的横截面，所述PCB板2搭在所述第一凸台43的顶面。
本实施例中，所述取样脚41中，在对应于第一凸台43的上面的其中一部分的外面还涂覆一层焊锡层44。
本实施例中，所述采样电阻片4的通孔42位于两个取样脚41连线的中点的垂直线上。
本实施例中，所述线圈引出脚5分布在靠近壳体的第二侧的壳体的顶面，壳体的第二侧与所述壳体1的第一侧相对，在靠近所述壳体1的第二侧的壳体的顶面的两边还分别设有第二凸台11，且所述第二凸台11的顶面的高度位置与所述第一凸台43的顶面的高度位置相平齐；所述PCB板2搭在所述第一凸台43的顶面和所述第二凸台11的顶面上。
本实施例中，所述采样电阻片4为锰铜片。
本公开的一种电子式电能表，包括如上所述的两路计量继电器。
本公开的一种可计量的电磁继电器及其电子式电能表，采用了在每一路引出片中，各有一个引出片包括一段采用高电阻率材料制作而成的板体状的采样电阻片4，采样电阻片4上设有同方向伸出的两个取样脚41，用于实现电流的流入和流出；所述PCB板2分别与两个采样电阻片4的取样脚41插接焊接相连接；所述两个采样电阻片4中，分别沿着板体的厚度方向设有一个通孔42，以利用该通孔42所形成的第一封闭环S1在外部交变磁场中产生的感应电流抵消由采样电阻片4、取样脚41和PCB 板2所围成的第二封闭环S2在外部交变磁场中产生的感应电流，从而提升继电器在交变磁场计量抗干扰度能力。本公开利用两路采样电阻片4来作为采样电路进行计量，且两路采样电阻片4设置同方向取样脚41与PCB板2直接插接焊接相固定，避免了现有技术的信号线连接所产生的诸多弊端，具有制作成本低、便于安装、自动化程度高的特点，本公开利用采样电阻片4的通孔42在外部交变磁场中产生的感应电流抵消由采样电阻片4、取样脚41和PCB板2所围成的第二封闭环在外部交变磁场中产生的感应电流，可以降低交变电磁场干扰锰铜计量精度影响，升继电器在交变磁场计量抗干扰度能力。
实施例二
参见图14至图18所示，本公开的一种可计量的电磁继电器及其电子式电能表，与实施例一的不同之处在于，电磁继电器为一路计量电磁继电器，电磁继电器只有两个引出片，两个引出片33、34中，引出片33包括一段采用高电阻率材料制作而成的板体状的采样电阻片4。与实施例一的另一不同之处在于，壳体的顶面未设第二凸台11，而是在线圈引出脚5的位置设第三凸台12，所述PCB板2搭在所述第一凸台43的顶面和所述第三凸台12的顶面上。
此外，现有技术的一种用于电子式电能表的两路计量继电器通常包括壳体、壳体内的触点组件以及和壳体内的对应触点组件相连接的引出片，这种两路计量继电器设有四个引出片，每两个引出片组成一路并分别连接对应的一路触点组件，在两路引出片中，每一路的两个引出片中的其中一个引出片设有计量装置，其中一路的一个引出片中设有一段锰铜片作为采样电路进行计量，另一路的一个引出片则装有电流互感器作为采样电路进行计量，现有技术的这种计量模式的两路计量继电器主要存在如下弊端：一是，由于其中一路的计量采用了电流互感器，致使继电器的成本较高，影响了产品的竞争力；二是，锰铜片和电流互感器均采用信号线进行连接，加上线圈引出也采用信号线连接，造成了生产工艺复杂，信号线多容易焊错，人工成本高，自动化程度低等弊端。
本公开还提供一种两路计量继电器及其电子式电能表，通过结构改进，避免了信号线连接所产生的诸多弊端，具有制作成本低、便于安装、自动化程度高的特点，并能提升继电器在交变磁场计量抗干扰度能力。
本公开解决其技术问题所采用的技术方案是：一种两路计量继电器，包括壳体、PCB板以及由壳体内向壳体的第一侧外伸出的且与壳体内的触点组件相连接的引出片，其中，引出片为四个，每两个引出片分别连接对应的一路触点组件；在每一路引出片中，各有一个引出片包括一段采用高电阻率材料制作而成的板体式的采样电阻片以及连接在采样电阻片两端的导电片，在采样电阻片的两端部位置设有同方向伸出的两个取样脚，用于实现电流的流入和流出；所述PCB板分别与两个引出片的取样脚插接焊接相连接。
所述两个采样电阻片中，分别沿着板体的厚度方向设有一个通孔，以利用该通孔所形成的第一封闭环在外部交变磁场中产生的感应电流抵消由采样电阻片、取样脚和PCB板所围成的第二封闭环在外部交变磁场中产生的感应电流，从而提升继电器在交变磁场计量抗干扰度能力。
所述PCB板在同一平面上与所述两个引出片的取样脚插接焊接相连接。
所述壳体还设有从壳体内伸出的线圈引出脚，所述线圈引出脚和所述两个引出片的取样脚分别与所述PCB板在同一平面上插接焊接相连接。
所述同一引出片中的两个取样脚分别连接在所对应的采样电阻片的顶面。
所述同一引出中的两个取样脚分别连接在所对应的导电片的顶面。
所述各取样脚分别设为插针式结构。
所述取样脚中，在与对应的引出片的相连接处还设有第一凸台，且所述第一凸台的横截面大于所述取样脚的横截面，所述PCB板搭在所述第一凸台的顶面。
所述取样脚中，在对应于第一凸台的上面的其中一部分的外面还涂覆一层焊锡层。
所述采样电阻片的通孔位于两个取样脚连线的中点的垂直线上。
所述采样电阻片的通孔位于采样电阻片的正中心位置。
所述线圈引出脚分布在靠近与所述壳体的第一侧相对的壳体的第二侧的壳体的顶面，在靠近所述壳体的第二侧的壳体的顶面的两边还分别设有第二凸台，且所述第二凸台的顶面的高度位置与所述第一凸台的顶面的高度位置相平齐；所述PCB板搭在所述第一凸台的顶面和所述第二凸台的顶面上。
所述四个引出片沿着所述壳体的第一侧顺序排列，其中，处于中间的两个引出片分别由所述壳体的第一侧的一边与壳体内的一路触点组件相连接，处于两侧的两个引出片中的一个引出片由壳体的底部绕至靠近另一个引出片处由所述壳体的第一侧的另一边与壳体内的另一路触点组件相连接。
所述采样电阻片为锰铜片或康铜片。
一种电子式电能表，包括如上所述的两路计量继电器。
与现有技术相比较，本公开的有益效果是：
本公开在每一路引出片中，各有一个引出片包括一段采用高电阻率材料制作而成的板体式的采样电阻片，采样电阻片上设有同方向伸出的两个取样脚，用于实现电流的流入和流出；所述PCB板分别与两个引出片的取样脚插接焊接相连接。本公开利用两路采样电阻片来作为采样电路进行计量，且两路采样电阻片设置同方向取样脚与PCB板直接插接焊接相固定，避免了现有技术的信号线连接所产生的诸多弊端，具有制作成本低、便于安装、自动化程度高的特点。
进一步的，本公开由于采用了所述两个采样电阻片中，分别沿着板体的厚度方向设有一个通孔，以利用该通孔所形成的第一封闭环在外部交变磁场中产生的感应电流 抵消由采样电阻片、取样脚和PCB板所围成的第二封闭环在外部交变磁场中产生的感应电流，从而提升继电器在交变磁场计量抗干扰度能力。本公开利用采样电阻片的通孔在外部交变磁场中产生的感应电流抵消由采样电阻片、取样脚和PCB板所围成的第二封闭环在外部交变磁场中产生的感应电流，可以降低交变电磁场干扰锰铜计量精度影响，提升继电器在交变磁场计量抗干扰度能力。
以下结合附图及实施例对本公开作进一步详细说明；但本公开的一种两路计量继电器及其电子式电能表不局限于实施例。
实施例三
参见图19至图30所示，本公开的一种两路计量继电器，包括壳体1、PCB板2以及由壳体内向壳体的第一侧外伸出的且与壳体内的触点组件相连接的引出片3，其中，引出片3为四个，四个引出片沿着所述壳体1的第一侧顺序排列，即引出片33、引出片31、引出片32、引出片34沿着所述壳体1的第一侧顺序排列，其中，处于中间的两个引出片31、32分别由所述壳体的第一侧的一边与壳体内的一路触点组件相连接，处于两侧的两个引出片中的一个引出片33由壳体的底部绕至靠近另一个引出片34处由所述壳体的第一侧的另一边与壳体内的另一路触点组件相连接；在引出片31、引出片32中，引出片31包括一段采用高电阻率材料制作而成的板体式的采样电阻片4以及连接在采样电阻片4两端的导电片6，在引出片33、引出片34中，引出片33包括一段采用高电阻率材料制作而成的板体式的采样电阻片4以及连接在采样电阻片4两端的导电片6，以下以引出片33(如图11、图12所示)来具体说明采样电阻片4的结构，引出片31的采样电阻片4的结构与引出片33的采样电阻片4的结构相同，值得说明的是，引出片33为外引出片，引出片33还通过内引出片331接入壳体内；在采样电阻片4的两端部位置设有同方向伸出的两个取样脚41，用于实现电流的流入和流出；所述PCB板2分别与两个采样电阻片(即引出片31的采样电阻片4和引出片33的采样电阻片4)的两端取样脚41插接焊接相连接。
本实施例中，所述同一采样电阻片中的两个取样脚41分别连接在所对应的采样电阻片4的两端的端内的顶面。
当然，同一采样电阻片中的两个取样脚也可以分别连接在所对应的采样电阻片的两端的端外的导电片的顶面。
本实施例中，所述PCB板2在同一平面上与所述两个采样电阻片4的取样脚41插接焊接相连接。
本实施例中，所述壳体1还设有从壳体内伸出的线圈引出脚5，所述线圈引出脚5和所述两个采样电阻片4的取样脚41分别与所述PCB板2在同一平面上插接焊接相连接。
本实施例中，所述两个采样电阻片4中的各取样脚41分别设为插针式结构。
本实施例中，所述取样脚41中，在与对应的采样电阻片4的相连接处还设有第一凸台43，且所述第一凸台43的横截面大于所述取样脚41的横截面，所述PCB板2搭在所述第一凸台43的顶面。
本实施例中，所述取样脚41中，在对应于第一凸台43的上面的其中一部分的外面还涂覆一层焊锡层44。
本实施例中，所述采样电阻片4的通孔42位于两个取样脚41连线的中点的垂直线上。
本实施例中，所述线圈引出脚5分布在靠近与所述壳体1的第一侧相对的壳体的第二侧的壳体的顶面，在靠近所述壳体1的第二侧的壳体的顶面的两边还分别设有第二凸台11，且所述第二凸台11的顶面的高度位置与所述第一凸台43的顶面的高度位置相平齐；所述PCB板2搭在所述第一凸台43的顶面和所述第二凸台11的顶面上。
本实施例中，所述采样电阻片4为锰铜片，所述导电片6为紫铜片。
本公开的一种电子式电能表，包括如上所述的两路计量继电器。
本公开的一种两路计量继电器及其电子式电能表，采用了在每一路引出片中，各有一个引出片包括一段采用高电阻率材料制作而成的板体式的采样电阻片4，采样电阻片4上设有同方向伸出的两个取样脚41，用于实现电流的流入和流出；所述PCB板2分别与两个引出片的取样脚41插接焊接相连接。本公开利用两路采样电阻片来作为采样电路进行计量，且两路采样电阻片设置同方向取样脚与PCB板直接插接焊接相固定，避免了现有技术的信号线连接所产生的诸多弊端，具有制作成本低、便于安装、自动化程度高的特点。
实施例四
参见图31至图35所示，本公开的一种两路计量继电器及其电子式电能表，与实施例三的不同之处在于，在引出片31的采样电阻片4和引出片33的采样电阻片4中，分别沿着板体的厚度方向设有一个通孔42，以利用该通孔42所形成的第一封闭环S1在外部交变磁场中产生的感应电流抵消由采样电阻片4、取样脚41和PCB板2所围成的第二封闭环S2在外部交变磁场中产生的感应电流(如图14所示)，从而提升继电器在交变磁场计量抗干扰度能力。根据电磁感应定律可知：
Figure PCTCN2022142674-appb-000003
其中
Figure PCTCN2022142674-appb-000004
为穿过闭合回路的磁通量，t为时间，B为磁感应强度，S为垂直于磁场方向的面积；当将通孔42所形成的第一封闭环S1的面积设置成采样电阻片4、取样脚41和PCB板2所围成的第二封闭环S2的面积时，则可以抵消外部的磁干扰。
本公开的一种两路计量继电器及其电子式电能表，采用了所述两个采样电阻片4中，分别沿着板体的厚度方向设有一个通孔42，以利用该通孔42所形成的第一封闭环S1在外部交变磁场中产生的感应电流抵消由采样电阻片4、取样脚41和PCB板2 所围成的第二封闭环S2在外部交变磁场中产生的感应电流，从而提升继电器在交变磁场计量抗干扰度能力。本公开利用采样电阻片的通孔42在外部交变磁场中产生的感应电流抵消由采样电阻片4、取样脚41和PCB板2所围成的第二封闭环在外部交变磁场中产生的感应电流，可以降低交变电磁场干扰锰铜计量精度影响，提升继电器在交变磁场计量抗干扰度能力。
应可理解的是，本公开不将其应用限制到本说明书提出的部件的详细结构和布置方式。本公开能够具有其他实施方式，并且能够以多种方式实现并且执行。前述变形形式和修改形式落在本公开的范围内。应可理解的是，本说明书公开和限定的本公开延伸到文中和/或附图中提到或明显的两个或两个以上单独特征的所有可替代组合。所有这些不同的组合构成本公开的多个可替代方面。本说明书所述的实施方式说明了已知用于实现本公开的最佳方式，并且将使本领域技术人员能够利用本公开。

Claims (30)

  1. 一种可计量的电磁继电器，包括壳体、PCB板以及由壳体内向壳体的第一侧外伸出的且与壳体内的触点组件相连接的两个引出片；所述两个引出片中的其中一个引出片包括一段采用高电阻率材料制作而成的板体状的采样电阻片以及连接在所述采样电阻片两端部的导电片，在所述引出片上位于所述采样电阻片的两端部位置设有同方向伸出的两个取样脚，用于实现电流的流入和流出；所述PCB板分别与两个所述取样脚插接焊接相连接；其特征在于：所述采样电阻片中，沿着板体的厚度方向设有一个通孔，以利用该通孔所形成的第一封闭环在外部交变磁场中产生的感应电流抵消由采样电阻片、取样脚和PCB板所围成的第二封闭环在外部交变磁场中产生的感应电流，从而提升继电器在交变磁场计量抗干扰度能力。
  2. 根据权利要求1所述的可计量的电磁继电器，其特征在于：所述第一封闭环的面积与第二封闭环的面积相同，所述第一封闭环在外部交变磁场中产生的感应电流完全抵消所述第二封闭环在外部交变磁场中产生的感应电流。
  3. 根据权利要求1或2所述的可计量的电磁继电器，其特征在于：所述由壳体内向壳体的第一侧外伸出的且与壳体内的触点组件相连接的引出片为两个，所述壳体内的触点组件为一路；所述两个引出片中，其中一个引出片包括所述采样电阻片。
  4. 根据权利要求1或2所述的可计量的电磁继电器，其特征在于：所述由壳体内向壳体的第一侧外伸出的且与壳体内的触点组件相连接的引出片为四个，所述壳体内的触点组件为二路；所述四个引出片中，每两个引出片分别连接对应的一路触点组件；在每一路引出片中，各有一个引出片包括所述采样电阻片。
  5. 根据权利要求1或2所述的可计量的电磁继电器，其特征在于：所述PCB板在同一平面上与所述取样脚插接焊接相连接。
  6. 根据权利要求5所述的可计量的电磁继电器，其特征在于：所述壳体还设有从壳体内伸出的线圈引出脚，所述线圈引出脚和所述取样脚分别与所述PCB板在同一平面上插接焊接相连接。
  7. 根据权利要求5所述的可计量的电磁继电器，其特征在于：同一个所述引出片中的两个取样脚分别连接在所对应的采样电阻片的顶面。
  8. 根据权利要求5所述的可计量的电磁继电器，其特征在于：同一所述引出片中的两个取样脚分别连接在所对应的导电片的顶面。
  9. 根据权利要求7或8所述的可计量的电磁继电器，其特征在于：所述取样脚为插针式结构。
  10. 根据权利要求6所述的可计量的电磁继电器，其特征在于：所述取样脚中，在与对应的引出片的相连接处还设有第一凸台，且所述第一凸台的横截面大于所述取样脚的横截面，所述PCB板搭在所述第一凸台的顶面。
  11. 根据权利要求10所述的可计量的电磁继电器，其特征在于：所述取样脚中，在对应于第一凸台的上面的其中一部分的外面还涂覆一层焊锡层。
  12. 根据权利要求1或2所述的可计量的电磁继电器，其特征在于：所述采样电阻片的通孔位于两个取样脚连线的中点的垂直线上。
  13. 根据权利要求10所述的可计量的电磁继电器，其特征在于：所述线圈引出脚分布在靠近所述壳体的第二侧的壳体顶面，所述壳体的第二侧与所述壳体的第一侧相对，在靠近所述壳体的第二侧的壳体的顶面的两边还分别设有第二凸台，且所述第二凸台的顶面的高度位置与所述第一凸台的顶面的高度位置相平齐；所述PCB板搭在所述第一凸台的顶面和所述第二凸台的顶面上。
  14. 根据权利要求3所述的可计量的电磁继电器，其特征在于：所述四个引出片沿着所述壳体的第一侧顺序排列，其中，处于中间的两个引出片分别由所述壳体的第一侧的一边与壳体内的一路触点组件相连接，处于两侧的两个引出片中的一个引出片由壳体的底部绕至靠近另一个引出片处由所述壳体的第一侧的另一边与壳体内的另一路触点组件相连接。
  15. 根据权利要求1所述的可计量的电磁继电器，其特征在于：所述采样电阻片为锰铜片或康铜片。
  16. 一种电子式电能表，其特征在于：包括如权利要求1至14中任一权利要求所述的可计量的电磁继电器。
  17. 一种两路计量继电器，包括壳体、PCB板以及由壳体内向壳体的第一侧外伸出的且与壳体内的触点组件相连接的引出片，其中，引出片为四个，每两个引出片分别连接对应的一路触点组件；其特征在于：在每一路引出片中，各有一个引出片包括一段采用高电阻率材料制作而成的板体式的采样电阻片以及连接在采样电阻片两端的导电片，在采样电阻片的两端部位置设有同方向伸出的两个取样脚，用于实现电流的流入和流出；所述PCB板分别与两个引出片的取样脚插接焊接相连接。
  18. 根据权利要求17所述的两路计量继电器，其特征在于：所述两个采样电阻片中，分别沿着板体的厚度方向设有一个通孔，以利用该通孔所形成的第一封闭环在外部交变磁场中产生的感应电流抵消由采样电阻片、取样脚和PCB板所围成的第二封闭环在外部交变磁场中产生的感应电流，从而提升继电器在交变磁场计量抗干扰度能力。
  19. 根据权利要求17所述的两路计量继电器，其特征在于：所述PCB板在同一平面上与所述两个引出片的取样脚插接焊接相连接。
  20. 根据权利要求19所述的两路计量继电器，其特征在于：所述壳体还设有从壳体内伸出的线圈引出脚，所述线圈引出脚和所述两个引出片的取样脚分别与所述PCB板在同一平面上插接焊接相连接。
  21. 根据权利要求19所述的两路计量继电器，其特征在于：所述同一引出片中 的两个取样脚分别连接在所对应的采样电阻片的两端的端内的顶面。
  22. 根据权利要求19所述的两路计量继电器，其特征在于：所述同一引出片中的两个取样脚分别连接在所对应的采样电阻片的两端的端外的导电片的顶面。
  23. 根据权利要求21或22所述的两路计量继电器，其特征在于：所述两个引出片中的各取样脚分别设为插针式结构。
  24. 根据权利要求20所述的两路计量继电器，其特征在于：所述取样脚中，在与对应的采样电阻片的相连接处还设有第一凸台，且所述第一凸台的横截面大于所述取样脚的横截面，所述PCB板搭在所述第一凸台的顶面。
  25. 根据权利要求24所述的两路计量继电器，其特征在于：所述取样脚中，在对应于第一凸台的上面的其中一部分的外面还涂覆一层焊锡层。
  26. 根据权利要求18所述的两路计量继电器，其特征在于：所述采样电阻片的通孔位于两个取样脚连线的中点的垂直线上。
  27. 根据权利要求26所述的两路计量继电器，其特征在于：所述采样电阻片的通孔位于采样电阻片的正中心位置。
  28. 根据权利要求24所述的两路计量继电器，其特征在于：所述线圈引出脚分布在靠近与所述壳体的第一侧相对的壳体的第二侧的壳体的顶面，在靠近所述壳体的第二侧的壳体的顶面的两边还分别设有第二凸台，且所述第二凸台的顶面的高度位置与所述第一凸台的顶面的高度位置相平齐；所述PCB板搭在所述第一凸台的顶面和所述第二凸台的顶面上。
  29. 根据权利要求17所述的两路计量继电器，其特征在于：所述四个引出片沿着所述壳体的第一侧顺序排列，其中，处于中间的两个引出片分别由所述壳体的第一侧的一边与壳体内的一路触点组件相连接，处于两侧的两个引出片中的一个引出片由壳体的底部绕至靠近另一个引出片处由所述壳体的第一侧的另一边与壳体内的另一路触点组件相连接。
  30. 一种电子式电能表，其特征在于：包括如权利要求17至29中任一权利要求所述的两路计量继电器。
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