Magnetic latching relay for three-phase meter installation

Abstract

This invention discloses a magnetic latching relay for installation in a three-phase electricity meter, comprising a housing, a coil yoke assembly, a magnet assembly, a movable strip, an on / off assembly, and a micro switch. The housing has a first mounting cavity, within which the coil yoke assembly is fixedly mounted. The magnet assembly is rotatably mounted within the first mounting cavity, cooperating with the coil yoke assembly. A push arm is fixed to the magnet assembly. A movable strip is slidably mounted within the first mounting cavity, having one first insertion hole and three second insertion holes. The end of the push arm is inserted into the first insertion hole and movably connected to the movable strip. This invention, by cooperating with the push plate on the movable strip and the micro switch, allows the magnetic latching relay to change the state of the electronic components connected to the micro switch after opening and closing. This facilitates feedback from the remote end of the smart meter regarding whether the on / off switching has actually been executed, ensuring the reliability of the smart meter.

Description

Technical Field

[0001] This invention relates to the technical field of electricity meters, and in particular to the technical field of magnetic latching relays. Background Technology

[0002] The open / closed state of a magnetic latching relay is maintained by the magnetic force generated by a permanent magnet. When the relay contacts need to switch between open and closed states, a positive or negative DC pulse voltage is used to excite the coil. The magnetic poles generated by the excitation coil interact with the permanent magnet, and the relay completes the state transition instantaneously. When the contacts are in the holding state, the coil does not need to be energized; the magnetic force of the permanent magnet alone is sufficient to maintain the relay's state. Therefore, it has advantages such as energy saving, stable performance, small size, and high load capacity, and is widely used in remote control, communication devices, smart meters, and other fields. Existing smart meters can control the on / off state of the meter's output circuit by remotely controlling the magnetic latching relay. However, when the module that sends the pulse current to the magnetic latching relay malfunctions, a situation may occur where the remote end changes the meter's state, but the meter does not actually execute the action, although the remote end displays that it has. Summary of the Invention

[0003] The purpose of this invention is to solve the problems in the prior art and to propose a magnetic latching relay for the installation of three-phase electricity meters, which enables the electronic components connected to the microswitch to change state after the magnetic latching relay is opened and closed through the microswitch.

[0004] To achieve the above objectives, this invention proposes a magnetic latching relay for installation in a three-phase electricity meter, comprising a housing, a coil yoke assembly, a magnet assembly, a movable strip, a switching assembly, and a micro switch. The housing contains a first mounting cavity, within which the coil yoke assembly is fixedly mounted. The magnet assembly is rotatably mounted within the first mounting cavity, cooperating with the coil yoke assembly. A push arm is fixed to the magnet assembly. A movable strip is slidably mounted within the first mounting cavity, having one first insertion hole and three second insertion holes. The end of the push arm is inserted into the first insertion hole and movably connected to the movable strip. Three switching assemblies are installed within the first mounting cavity, each corresponding to one second insertion hole. The coil yoke assembly and the magnet assembly are located between two of the switching assemblies. Each switching assembly consists of a first fixed conductor, a second fixed conductor, a stationary contact, a first spring, a movable conductive plate, and a moving contact. The device consists of two fixed conductors, one of which extends partially through the outer shell to the outside. Both the first and second fixed conductors are fixed to the first mounting cavity. A stationary contact is mounted on the second fixed conductor, located inside the first mounting cavity. One end of the first spring is fixed to the first fixed conductor, and the other end is fixed to a movable conductive plate. A movable contact that mates with the stationary contact is mounted on the movable conductive plate. The end of the movable conductive plate is inserted into a second socket and movably connected to a movable strip. A second mounting cavity is separated inside the outer shell, and a micro switch is installed in the second mounting cavity. The second mounting cavity is connected to the first mounting cavity through a clearance hole. The operating lever of the micro switch extends into the first mounting cavity through the clearance hole. A pusher plate that mates with the operating lever is provided on the movable strip. The movement trajectory of the pusher plate interferes with the operating lever in a non-forced state.

[0005] Preferably, a current transformer is installed on the second fixed conductor, and the current transformer is located outside the housing.

[0006] Preferably, the movable conductive sheet has two moving contacts, the arrangement direction of which is perpendicular to the length direction of the movable conductive sheet, and the second fixed conductor has two stationary contacts that correspond one-to-one with the moving contacts.

[0007] Preferably, the movable conductive sheet is provided with a partition slit, which penetrates the movable conductive sheet, and the two moving contacts are located on both sides of the partition slit.

[0008] Preferably, the moving contact is located near the end of the movable conductive sheet.

[0009] Preferably, the end of the movable conductive sheet is provided with two elastic sheets, which are separated from each other and are respectively close to the two inner sidewalls of the second socket. The arrangement direction of the two elastic sheets is consistent with the movement direction of the movable strip.

[0010] Preferably, all the first fixed conductors and the second fixed conductors are located on the same side of the housing.

[0011] Preferably, the first spring is a single spring or is composed of several single springs stacked together, with the middle of the single spring bent into a U-shape, and the first spring is riveted to the first fixed conductor and the first spring is riveted to the movable conductor.

[0012] Preferably, the outer side of the outer shell is an anti-magnetic shell.

[0013] The beneficial effects of this invention are as follows: By cooperating the pusher on the movable strip with a micro switch, the magnetic latching relay can change the state of the electronic components connected to the micro switch after opening and closing. This facilitates the remote end of the smart meter to receive feedback information on whether the on / off switching has actually been executed, ensuring the reliability of the smart meter. The micro switch is installed in a relatively independent second mounting cavity, which not only allows the micro switch to be in a relatively safe and insulated environment, but also reduces the safety space required for installing the micro switch lock, and makes installation more convenient. The on / off component, the coil yoke component, and the magnet component are all located in the first mounting cavity. The coil yoke component and the magnet component are located between two of the on / off components, which is beneficial for resisting constant strong magnetic interference, while ensuring that the coil yoke component maintains a certain safe distance from both sides of the outer casing. The anti-magnetic shell ensures that the magnetic latching relay can operate normally under strong magnetic interference.

[0014] The features and advantages of the present invention will be described in detail through embodiments and in conjunction with the accompanying drawings. Attached Figure Description

[0015] Figure 1 This is a front cross-sectional view of the magnetic latching relay used for the installation of a three-phase electricity meter according to the present invention; Figure 2 This is a rear cross-sectional view of the magnetic latching relay used in the installation of a three-phase electricity meter according to the present invention; Figure 3 This is an internal schematic diagram of the magnetic latching relay used in the installation of a three-phase electricity meter according to the present invention; Figure 4 This is a partial schematic diagram of the magnetic latching relay used in the installation of a three-phase electricity meter according to the present invention.

[0016] In the diagram: 1-Outer shell, 2-Coil yoke assembly, 3-Magnet assembly, 4-Moving bar, 6-Micro switch, 11-First mounting cavity, 12-Second mounting cavity, 30-Push arm, 40-Push plate, 41-First socket, 42-Second socket, 50-Mutual transformer, 51-First fixed conductor, 52-Second fixed conductor, 53-First spring, 54-Moving conductive plate, 55-Static contact, 56-Moving contact, 57-Elastic plate, 60-Operating lever. Detailed Implementation

[0017] Example 1: See Figure 1 , Figure 2 , Figure 3 and Figure 4 This invention relates to a magnetic latching relay for installation in a three-phase electricity meter, comprising a housing 1, a coil yoke assembly 2, a magnet assembly 3, a movable bar 4, an on / off assembly, and a micro switch 6. The housing 1 has a first mounting cavity 11, within which the coil yoke assembly 2 is fixedly mounted. The magnet assembly 3 is rotatably mounted within the first mounting cavity 11, cooperating with the coil yoke assembly 2. A push arm 30 is fixed to the magnet assembly 3. The movable bar 4 is slidably mounted within the first mounting cavity 11. The system has one first socket 41 and three second sockets 42. The end of the push arm 30 is inserted into the first socket 41 and movably connected to the movable strip 4. Three switching components are installed in the first mounting cavity 11, each corresponding to one second socket 42. The coil yoke assembly 2 and the magnet assembly 3 are located between two of the switching components. Each switching component consists of a first fixed conductor 51, a second fixed conductor 52, a stationary contact 55, a first spring 53, a movable conductive plate 54, and a moving contact 56. Both the first fixed conductor 51 and the second fixed conductor 52 have a portion extending through the outer shell 1 to the outside of the outer shell 1. Both the first fixed conductor 51 and the second fixed conductor 52 are fixed to the first mounting cavity 11. A stationary contact 55 is installed on the second fixed conductor 52, and the stationary contact 55 is located inside the first mounting cavity 11. One end of the first spring 53 is fixed to the first fixed conductor 51, and the other end of the first spring 53 is fixed to the movable conductive plate 54. A movable contact 56 that cooperates with the stationary contact 55 is installed on the movable conductive plate 54. The end of the movable conductive sheet 54 is inserted into the second socket 42 and movably connected to the movable strip 4. The inside of the outer shell 1 is divided into a second mounting cavity 12, in which a micro switch 6 is installed. The second mounting cavity 12 is connected to the first mounting cavity 11 through a clearance hole. The operating rod 60 of the micro switch 6 passes through the clearance hole and extends into the first mounting cavity 11. The movable strip 4 is provided with a pusher 40 that cooperates with the operating rod 60. The movement trajectory of the pusher 40 interferes with the operating rod 60 in the non-forced state.

[0018] The magnetic latching relay is installed inside the smart meter, and the micro switch 6 is connected to an electronic component that feeds back the real-time status to the remote control terminal of the smart meter.

[0019] A current transformer 50 is mounted on the second fixed conductor 52, and the current transformer 50 is located outside the housing 1.

[0020] To improve conductivity and ensure reliable contact between the moving contact 56 and the stationary contact 55, the movable conductive sheet 54 has two moving contacts 56, and the arrangement direction of the two moving contacts 56 is perpendicular to the length direction of the movable conductive sheet 54. The second fixed conductor 52 is equipped with two stationary contacts 55 that correspond one-to-one with the moving contacts 56.

[0021] The movable conductive sheet 54 is provided with a partition slit, which penetrates the movable conductive sheet 54, and two moving contacts 56 are located on both sides of the partition slit.

[0022] The moving contact 56 is located near the end of the movable conductive sheet 54.

[0023] To ensure that the movable strip 4 can move the movable conductive sheet 54 without damaging it, the movable conductive sheet 54 is provided with two elastic sheets 57 at its end. The two elastic sheets 57 are separated from each other and are close to the two inner sidewalls of the second insertion hole 42 respectively. The arrangement direction of the two elastic sheets 57 is consistent with the moving direction of the movable strip 4.

[0024] All first fixed conductors 51 and second fixed conductors 52 are located on the same side of the outer casing 1.

[0025] Example 2: In order to improve the conductivity of the first spring 53 while maintaining its flexibility for easy driving, the first spring 53 is a single spring or composed of several single springs stacked together. The middle part of the single spring is bent into a U-shape. The first spring 53 is riveted to the first fixed conductor 51 and the first spring 53 is riveted to the movable conductive sheet 54.

[0026] Example 3: To improve the ability to resist strong magnetic field interference, the outer side of the outer shell 1 is a shell resistant to strong magnets.

[0027] The working process of this invention: In the operation of the magnetic latching relay used in the installation of a three-phase electricity meter, the remote control terminal of the electricity meter issues a command to switch the relay from the closed state to the open state. The unit that supplies power to the coil yoke assembly 2 in the electricity meter emits a pulse current. Under the action of the pulse current, the magnetic field generated by the coil yoke assembly 2 drives the magnet assembly 3 to rotate. The actuating body 30 on the magnet assembly 3 drives the movable bar 4 to move. The movable bar 4 drives the movable conductive plate 54 to move away from the stationary contact 55. The moving contact 56 separates from the stationary contact 55, and the relay switches to the open state. During this process, the pusher 40 on the movable bar 4 will press the operating lever 60 of the micro switch 6. At this time, the state of the electronic component connected to the micro switch 6 changes. The state information of the electronic component is fed back to the remote control terminal of the electricity meter in real time. The remote control terminal of the electricity meter uses this state information to confirm whether the relay has been activated.

[0028] The remote control terminal of the electricity meter sends a command to switch the relay from the open state to the closed state. The unit supplying power to the coil yoke assembly 2 in the electricity meter emits a pulse current. Under the action of the pulse current, the magnetic field generated by the coil yoke assembly 2 drives the magnet assembly 3 to rotate. The actuating body 30 on the magnet assembly 3 drives the movable bar 4 to move. The movable bar 4 drives the movable conductive plate 54 to move closer to the stationary contact 55. Finally, the moving contact 56 and the stationary contact 55 are attracted together, and the relay switches to the closed state. During this process, the pusher 40 on the movable bar 4 releases the pressure on the operating lever 60 of the micro switch 6. At this time, the state of the electronic component connected to the micro switch 6 changes. The state information of this electronic component is fed back to the remote control terminal of the electricity meter in real time. The remote control terminal of the electricity meter uses this state information to confirm whether the relay has been activated.

[0029] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the scope of protection of the present invention.

Claims

1. A magnetic latching relay for installation in a three-phase electricity meter, characterized in that: The assembly includes a housing (1), a coil yoke assembly (2), a magnet assembly (3), a movable bar (4), an on / off assembly, and a micro switch (6). The housing (1) has a first mounting cavity (11) inside, in which the coil yoke assembly (2) is fixedly mounted. The magnet assembly (3) is rotatably mounted within the first mounting cavity (11), cooperating with the coil yoke assembly (2). A push arm (30) is fixedly mounted on the magnet assembly (3). The movable bar (4) is slidably mounted within the first mounting cavity (11), and the movable bar (4) has a first insertion hole (41) and a... Three second sockets (42) are provided. The end of the push arm (30) is inserted into the first socket (41) and movably connected to the movable bar (4). Three switching components are installed in the first mounting cavity (11), each switching component corresponding to one second socket (42). The coil yoke assembly (2) and the magnet assembly (3) are located between two of the switching components. The switching component consists of a first fixed conductor (51), a second fixed conductor (52), a stationary contact (55), a first spring (53), a movable conductive plate (54), and a moving contact (56). The first fixed conductor (51) and the second fixed conductor... Each body (52) has a portion extending through the outer shell (1) to the outside of the outer shell (1). The first fixed conductor (51) and the second fixed conductor (52) are both fixed to the first mounting cavity (11). A stationary contact (55) is installed on the second fixed conductor (52), and the stationary contact (55) is located inside the first mounting cavity (11). One end of the first spring (53) is fixed to the first fixed conductor (51), and the other end of the first spring (53) is fixed to the movable conductive sheet (54). A moving contact (56) that cooperates with the stationary contact (55) is installed on the movable conductive sheet (54). (54) The end is inserted into the second socket (42) and connected to the movable strip (4). The outer shell (1) is divided into a second mounting cavity (12). A micro switch (6) is installed in the second mounting cavity (12). The second mounting cavity (12) is connected to the first mounting cavity (11) through a clearance hole. The operating rod (60) of the micro switch (6) passes through the clearance hole and extends into the first mounting cavity (11). The movable strip (4) is provided with a push plate (40) that cooperates with the operating rod (60). The movement trajectory of the push plate (40) interferes with the operating rod (60) in the non-forced state.

2. The magnetic latching relay for installation of a three-phase electricity meter as described in claim 1, characterized in that: A current transformer (50) is installed on the second fixed conductor (52), and the current transformer (50) is located outside the housing (1).

3. The magnetic latching relay for installation of a three-phase electricity meter as described in claim 1, characterized in that: The movable conductive sheet (54) has two movable contacts (56), and the arrangement direction of the two movable contacts (56) is perpendicular to the length direction of the movable conductive sheet (54). The second fixed conductor (52) is equipped with two stationary contacts (55) that correspond one-to-one with the movable contacts (56).

4. The magnetic latching relay for installation of a three-phase electricity meter as described in claim 3, characterized in that: The movable conductive sheet (54) is provided with a partition slit, which penetrates the movable conductive sheet (54), and two movable contacts (56) are located on both sides of the partition slit.

5. The magnetic latching relay for installation of a three-phase electricity meter as described in claim 1, characterized in that: The moving contact (56) is located near the end of the movable conductive sheet (54).

6. The magnetic latching relay for installation of a three-phase electricity meter as described in claim 1, characterized in that: The movable conductive sheet (54) has two elastic sheets (57) at its end. The two elastic sheets (57) are separated from each other and are close to the two inner walls of the second socket (42). The arrangement direction of the two elastic sheets (57) is consistent with the movement direction of the movable strip (4).

7. The magnetic latching relay for installation of a three-phase electricity meter as described in claim 1, characterized in that: All the first fixed conductors (51) and the second fixed conductors (52) are located on the same side of the housing (1).

8. The magnetic latching relay for installation of a three-phase electricity meter as described in claim 1, characterized in that: The first spring (53) is a single spring or is composed of several single springs stacked together. The middle part of the single spring is bent into a U-shape. The first spring (53) is riveted to the first fixed conductor (51) and the first spring (53) is riveted to the movable conductor (54).

9. The magnetic latching relay for installation in a three-phase electricity meter as described in claim 1, characterized in that: The outer side of the outer shell (1) is an anti-magnetic shell.

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