Electric energy meter external circuit breaker with electric leakage self-locking function

Abstract

According to the electric energy meter external circuit breaker with the electric leakage self-locking function, during electric leakage, an electromagnetic plate is activated and attracts a magnetic attraction plate, a power-off plate is made to move, connection between a wiring pipe and a conductive block is cut off, a power source is cut off automatically, meanwhile, a self-locking frame locks the power-off plate through an abutting rod and a torsional spring, and the power-off plate is locked through an electric leakage self-locking device. The function protection cover comprises a conductive inner plate and an insulating shell, leakage current is effectively conducted, the safety of an operator is protected, in addition, an insulating plate of a magnetic suction plate effectively prevents misoperation, operation convenience is provided by a pressing block with a rubber pad and an unlocking block, and the safety of the operator is guaranteed. The drying ring and the heating ring of the sealing ring ensure that the equipment resists moisture erosion, so that the maintenance is simple and convenient, the cost is low, and meanwhile, the maintenance frequency is reduced and the service life of the equipment is prolonged due to the reusable property of the torsion spring and the abutting rod, so that the overall safety is effectively improved.

Description

Technical Field

[0001] The invention relates to the field of electrical safety equipment, and more specifically to an external circuit breaker for an electric energy meter with a leakage self-locking function. Background Art

[0002] An energy meter is a device used to measure electricity consumption and is widely used in residential and industrial areas; it records the user's electricity consumption for billing and monitoring purposes; modern energy meters can not only accurately measure total electricity consumption, but also have intelligent functions such as real-time data analysis, remote monitoring and time-of-use billing; these functions help users optimize their electricity usage plans and improve energy efficiency, while also providing power companies with more accurate electricity usage data management; existing energy meters are usually used in conjunction with circuit breakers to ensure the safe operation of the circuit.

[0003] A circuit breaker is an automatic electrical switching device used to protect circuits from damage caused by overload or short circuit. When the current exceeds the set value, the circuit breaker automatically cuts off the circuit to prevent equipment damage and fire. It has manual and automatic operation functions and can be manually reset after the fault is eliminated. Circuit breakers are widely used in household, industrial and commercial power systems to ensure the safe and stable operation of the power system.

[0004] The external circuit breaker of the electric energy meter is a protective device installed near the electric energy meter, which is designed to enhance the safety of the circuit; it can detect abnormal conditions such as overload and short circuit, and cut off the power supply in time to prevent equipment damage and fire risks. However, when leakage occurs and there is no overload or does not affect the normal operation of the circuit, there will not only be safety hazards, but also the loss of electric energy will cause waste of resources. Even if the leakage does not directly cause overload or significantly affect the normal operation of the circuit, there will be safety hazards. At the same time, although the scale of electric energy loss that may be caused is small, from the perspective of long-term and large-scale use, this loss is still a waste of resources; and the circuit breakers in the prior art usually do not have the ability to respond immediately to leakage conditions, and most circuit breakers are set separately from the electric energy meter.

[0005] Therefore, in view of the above technical problems, it is necessary to provide an external circuit breaker for an electric energy meter with a leakage self-locking function. Summary of the invention

[0006] The object of the present invention is to provide an external circuit breaker for an electric energy meter with a leakage self-locking function to solve the above-mentioned problem.

[0007] In order to achieve the above purpose, the technical solution provided by an embodiment of the present invention is as follows:

[0008] An external circuit breaker for an electric energy meter with a leakage self-locking function comprises an electric energy meter body, the lower end of the electric energy meter body is fixedly connected to a circuit breaker body, the rear end of the circuit breaker body is fixedly connected to a functional protection cover, the upper and lower ends of the functional protection cover are fixedly connected to wiring tubes, and the wiring tubes penetrate the functional protection cover, a power-off plate is slidably connected inside the functional protection cover, and the power-off plate is located between a pair of wiring tubes, a pair of through holes are opened at the outer end of the functional protection cover, a pressing block and an unlocking block are slidably connected in the pair of through holes, and the pressing block is fixedly connected to the power-off plate, An electromagnetic plate is fixedly connected to the inner wall of the functional protection cover on one side close to the pressing block, a magnetic attraction plate is fixedly connected to the outer end of the power-off plate, a self-locking frame is fixedly connected to the inner end of the functional protection cover on one side close to the unlocking block, and the self-locking frame is located at the outer end of the power-off plate and is slidably connected to it. By combining the circuit breaker body with the electric energy meter body and adding the functional protection cover, the power-off plate, the pressing block and the unlocking block, automatic power-off can be achieved when leakage is detected, thereby enhancing safety. The setting of the functional protection cover can also protect internal components from the influence of the external environment and increase the durability of the equipment.

[0009] As a further improvement of the present invention, the functional protective cover includes a conductive inner plate, the outer end of the conductive inner plate is fixedly connected to an insulating shell, and the electromagnetic plate is fixedly connected to the inner wall of the conductive inner plate. By introducing the arrangement of the conductive inner plate and the insulating shell, the safety of the internal circuit of the electric energy meter is guaranteed, external electromagnetic interference is prevented, and the stability and safety of the circuit breaker are improved.

[0010] As a further improvement of the present invention, the wiring tube includes a wire sleeve, which is fixedly connected in the through hole, and a conductive sheet is fixedly connected to one end of the wire sleeve close to the power-off plate, a circular hole is opened in the middle of the conductive sheet, and a winding copper rod is fixedly connected to the inner end of the circular hole. By adding the wire sleeve and the conductive sheet, and arranging the winding copper rod on the conductive sheet, the current can be guided more effectively, and the stability and reliability of the wiring are enhanced.

[0011] As a further improvement of the present invention, the power-off board includes an insulating block, which is slidably connected in the functional protection cover and fixedly connected to the pressing block. A conductive block is fixedly connected in the middle of the insulating block and abuts against a pair of conductive sheets. By adding the insulating block and the conductive block, the power-off board can maintain good insulation during the sliding process and can also effectively conduct current, thereby enhancing the response speed and accuracy of the power-off function.

[0012] As a further improvement of the present invention, the self-locking frame includes a guide frame, which is fixedly connected to the inner wall of the conductive inner plate. A pair of rotating grooves are opened at the inner end of the conductive inner plate. The inner ends of the rotating grooves are rotatably connected to abutment rods, and the pair of abutment rods are respectively located at the upper and lower ends of the insulating block and abut therewith. By setting the self-locking frame and the abutment rods, and adding a torsion spring at the connection between the abutment rods and the guide frame, the power-off plate can be automatically locked after power-off to prevent accidental power-on due to misoperation or external force.

[0013] As a further improvement of the present invention, a torsion spring is installed at the rotating connection between the abutment rod and the guide frame, and the rotation angle of the abutment rod is 15°. The abutment portion between the abutment rod and the insulating block is in an arc shape. By setting the contact surface between the abutment rod and the insulating block as an arc surface and using it in combination with the torsion spring, not only the locking stability is increased, but also the friction and wear during operation are reduced, thereby improving the service life and reliability of the equipment.

[0014] As a further improvement of the present invention, the outer ends of the pressing block and the unlocking block are inlaid with sealing rings, and the sealing rings include a drying ring. The outer end of the drying ring is fixedly connected to a heating ring. By arranging sealing rings on the pressing block and the unlocking block, including the arrangement of a drying ring and a heating ring, moisture intrusion can be effectively prevented, and the internal circuit can be protected, especially providing additional protection in a humid environment.

[0015] As a further improvement of the present invention, the drying ring is an annular gauze bag, and the drying ring is filled with water-absorbing particles. By adopting the setting of the drying ring using an annular gauze bag filled with water-absorbing particles, moisture can be effectively absorbed and isolated, further improving the moisture-proof effect of electrical components and the stability of the overall equipment.

[0016] As a further improvement of the present invention, the pressing block and the unlocking block are fixedly connected to a rubber pad at one end away from the power-off plate. By adding rubber pads to the ends of the pressing block and the unlocking block away from the power-off plate, this arrangement can reduce vibration and noise during operation, while also protecting the equipment from damage due to excessive force.

[0017] As a further improvement of the present invention, the magnetic plate is fixedly connected to an insulating plate at one end near the wiring tube. By adding an insulating plate at one end near the wiring tube, accidental current conduction caused by leakage or short circuit can be avoided, thereby increasing the electrical safety of the entire device.

[0018] Compared with the prior art, the advantages of the present invention are:

[0019] In this solution, when there is a leakage, the electromagnetic plate is activated and attracts the magnetic plate, causing the power-off plate to move and disconnect the connection between the wiring tube and the conductive block, thereby automatically disconnecting the power supply. At the same time, the self-locking frame uses the abutment rod and the torsion spring to lock the power-off plate to ensure that the power is kept off before the power is restored. The functional protective cover, including the conductive inner plate and the insulating outer shell, not only effectively conducts the leakage current but also protects the operator's safety. In addition, the insulating plate of the magnetic plate effectively prevents misoperation. The convenience of operation is provided by the pressing block and the unlocking block with rubber pads, and the drying ring and the heating ring setting of the sealing ring ensure that the equipment resists moisture erosion, so that maintenance is simple and low-cost. At the same time, the reusable nature of the torsion spring and the abutment rod setting reduces the maintenance frequency and extends the service life of the equipment, thereby effectively improving the overall safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a side structural schematic diagram of the present invention;

[0022] Figure 3 It is a front cross-sectional structural schematic diagram of the functional protective cover of the present invention;

[0023] Figure 4 This is a schematic diagram of the self-locking structure of the functional protective cover of the present invention;

[0024] Figure 5 It is a schematic diagram of the wiring tube structure of the present invention;

[0025] Figure 6 It is a schematic diagram of the sealing ring structure of the present invention.

[0026] Description of the numbers in the figure:

[0027] 1. Electric energy meter body; 2. Circuit breaker body; 3. Functional protection cover; 31. Conductive inner plate; 32. Insulating outer shell; 4. Wiring tube; 41. Threading sleeve; 42. Conductive sheet; 43. Winding copper rod; 5. Power-off plate; 51. Insulating block; 52. Conductive block; 6. Pressing block; 7. Electromagnetic plate; 8. Magnetic plate; 9. Self-locking frame; 91. Guide frame; 92. Abutment rod; 10. Unlocking block; 11. Sealing ring; 111. Drying ring; 112. Heating ring; 12. Rubber pad. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0029] Embodiment 1:

[0030] See also Figure 1-6 An external circuit breaker for an electric energy meter with a leakage self-locking function comprises an electric energy meter body 1, a circuit breaker body 2 is fixedly connected to the lower end of the electric energy meter body 1, a functional protection cover 3 is fixedly connected to the rear end of the circuit breaker body 2, a wiring tube 4 is fixedly connected to both the upper and lower ends of the functional protection cover 3, and the wiring tube 4 passes through the functional protection cover 3. After the leakage occurs between the circuit breaker body 2 and the electric energy meter body 1, the power is cut off and locked, so as to reduce the continued flow and loss of current. The functional protection cover 3 is slidably connected with a power-off plate 5, and the power-off plate 5 is located between a pair of wiring tubes 4. A pair of through holes are opened at the outer end of the functional protection cover 3, and a pressing block 6 and an unlocking block 10 are slidably connected in the pair of through holes, and the pressing block 6 is fixedly connected to the power-off plate 5. An electromagnetic plate 7 is fixedly connected to the inner wall of the functional protection cover 3 near the pressing block 6. A magnetic attraction plate 8 is fixedly connected to the outer end of the power-off plate 5. An end of the magnetic attraction plate 8 near the wiring tube 4 is fixedly connected with an insulating plate, and the insulating plate can prevent the magnetic attraction plate 8 from being affected by the current of the wiring tube 4.

[0031] The functional protective cover 3 includes a conductive inner plate 31, an insulating shell 32 is fixedly connected to the outer end of the conductive inner plate 31, and the electromagnetic plate 7 is fixedly connected to the inner wall of the conductive inner plate 31. The current leaking from the wiring tube 4 can be conducted through the conductive inner plate 31 to activate the electromagnetic plate 7 for magnetization, while the insulating shell 32 can wrap and protect the outer end of the conductive inner plate 31 to prevent the staff from touching the conductive inner plate 31 and getting an electric shock. The insulating shell 32 is made of insulating material, and rubber or silicone can be selected.

[0032] A self-locking frame 9 is fixedly connected to the inner end of the functional protection cover 3 near the unlocking block 10, and the self-locking frame 9 is located at the outer end of the power-off plate 5 and is slidably connected thereto. The leakage current is conducted to the electromagnetic plate 7 through the functional protection cover 3, so that the electromagnetic plate 7 activates the magnetization to adsorb the magnetic attraction plate 8, so that the power-off plate 5 disconnects the electrical connection of a pair of wiring tubes 4. At the same time, the power-off plate 5 is fixed by the self-locking frame 9, so as to achieve the purpose of automatic locking. After the self-locking frame 9 is unlocked by the unlocking block 10, the power-off plate 5 is reset and continued to be used. The device includes an electric energy meter body 1 and a circuit breaker body 2, the latter of which is connected to the electric energy meter body 1 through the functional protection cover 3, and the functional protection cover 3 penetrates through the connection The wire tube 4 can automatically cut off the power supply and lock when leakage is detected to prevent the current from continuing to flow. The functional protection cover 3 is slidably connected with a power-off plate 5, which is located between the two wiring tubes 4. Through the setting of the functional protection cover 3, when leakage is detected, the electromagnetic plate 7 can be activated to adsorb the magnetic plate 8, thereby disconnecting the electrical connection of the wiring tube 4. At the same time, the self-locking frame 9 fixes the power-off plate 5 to lock the mechanism. The functional protection cover 3 conducts the leakage current to the electromagnetic plate 7 through the conductive inner plate 31. After activation, the magnetic plate 8 is attracted to move the power-off plate 5 to disconnect the connection of the wiring tube 4. The self-locking frame 9 is fixed in the functional protection cover 3, and is used to lock the power-off plate 5 in the power-off state to achieve automatic locking.

[0033] The wiring tube 4 includes a threading sleeve 41, which is fixedly connected in the through hole. A conductive sheet 42 is fixedly connected to one end of the threading sleeve 41 near the power-off plate 5. A circular hole is opened in the middle of the conductive sheet 42, and a winding copper rod 43 is fixedly connected to the inner end of the circular hole. The copper wire head of the wire is passed through the circular hole and wound around the outer end of the winding copper rod 43 by passing the wire through the threading sleeve 41, so that the functional protection cover 3 is integrally installed and connected between the electric energy meter body 1 and the circuit breaker body 2. The wiring tube 4 includes a threading sleeve 41 and a conductive sheet 42. A winding copper rod 43 is installed in the circular hole of the conductive sheet 42 for fixing and connecting the wires, ensuring current conduction while facilitating installation and connection.

[0034] The power-off board 5 includes an insulating block 51, which is slidably connected to the functional protection cover 3, and the insulating block 51 is fixedly connected to the pressing block 6. A conductive block 52 is fixedly connected in the middle of the insulating block 51, and the conductive block 52 abuts against a pair of conductive sheets 42. The pair of wiring tubes 4 are connected through the conductive block 52. When leakage occurs, the electromagnetic plate 7 is activated to magnetize the magnetic plate 8, so that the power-off board 5 moves accordingly, thereby separating the conductive block 52 from between the pair of wiring tubes 4, so that the insulating block 51 is located between the pair of wiring tubes 4, thereby disconnecting and performing power-off protection. The power-off board 5 includes an insulating block 51 and a conductive block 52. Under normal circumstances, the conductive block 52 is connected to the conductive sheet 42 of the wiring tube 4 to ensure smooth current flow. When leakage occurs, the electromagnetic plate 7 is activated to cause the power-off board 5 to move, and the conductive block 52 disconnects the connection of the wiring tube 4 to achieve power-off protection.

[0035] The self-locking frame 9 includes a guide frame 91, which is fixedly connected to the inner wall of the conductive inner plate 31. A pair of rotation grooves are provided at the inner end of the conductive inner plate 31. The inner end of the rotation groove is rotatably connected to abutment rods 92. The pair of abutment rods 92 are respectively located at the upper and lower ends of the insulating block 51 and abut against it. After the insulating block 51 is separated from the guide frame 91, the abutment rods 92 are moved inward and rotated, so that the pair of abutment rods 92 are pressed against the end of the insulating block 51 away from the pressing block 6, thereby limiting and fixing the power-off plate 5, i.e. locking. The self-locking frame 9 includes a guide frame 91 and abutment rods 92, which are used to fix the position of the power-off plate 5 after it moves, and the locking and unlocking of the power-off plate 5 are achieved by the rotation of the abutment rods 92 and the elastic force of the torsion spring.

[0036] A torsion spring is installed at the rotation connection between the abutment rod 92 and the guide frame 91, and the rotation angle of the abutment rod 92 is 15°. The abutment portion between the abutment rod 92 and the insulating block 51 is in an arc shape. The setting of the torsion spring allows the abutment rod 92 to be bent and rotated, and the limitation of the rotation angle allows the abutment rod 92 to have a certain length after rotation to abut and fix the insulating block 51. The setting of the arc surface at the abutment end of the insulating block 51 can reduce the friction between it and the insulating block 51, so that when resetting, the abutment rod 92 can easily slide over the insulating block 51 and reset to the inner end of the rotating groove. The abutment rod 92 is connected by a torsion spring, and can rotate and fix the power-off plate 5 inside when the power-off plate 5 moves. The arc surface setting reduces friction and facilitates the resetting of the power-off plate 5.

[0037] The outer ends of the pressing block 6 and the unlocking block 10 are both inlaid with sealing rings 11, and the sealing rings 11 include a drying ring 111. The outer end of the drying ring 111 is fixedly connected with a heating ring 112. The sealing ring 11 plays a role of sealing and moisture-proofing. The drying ring 111 can absorb the moisture in contact, and the heating ring 112 can heat and dry the drying ring 111, so that it can continue to be used. The outer ends of the pressing block 6 and the unlocking block 10 are equipped with sealing rings 11 including a water-absorbing drying ring 111 and a heating ring 112, which are used to keep the inside of the equipment dry and moisture-proof, and ensure long-term effective operation.

[0038] The drying ring 111 is a ring-shaped yarn bag, and the drying ring 111 is filled with water-absorbing particles. The water-absorbing particles are made of polyvinyl alcohol, which has good water absorption and film-forming properties, and can be reused many times by drying. The drying ring 111 is a yarn bag structure, and is filled with polyvinyl alcohol water-absorbing particles, which has good water absorption and film-forming properties. The heating ring 112 is used to dry the drying ring 111 so that it can be reused.

[0039] The pressing block 6 and the unlocking block 10 are fixedly connected to the end away from the power-off plate 5 with a rubber pad 12, which can be conveniently pressed by the pressing block 6 and the unlocking block 10, thereby playing an anti-slip and comfortable role. The pressing block 6 and the unlocking block 10 are provided with a rubber pad 12 to increase anti-slip and pressure buffering, and improve the comfort and convenience during operation.

[0040] Working principle:

[0041] When leakage occurs in the functional protection cover 3, the current is conducted from the conductive inner plate 31 to the electromagnetic plate 7, so that the electromagnetic plate 7 activates the magnetization to attract the magnetic attraction plate 8, and the power-off plate 5 moves the magnetic attraction plate 8 together, driving the conductive block 52 to separate from between the pair of wiring tubes 4, and placing the insulating block 51 between the pair of wiring tubes 4, thereby disconnecting the circuit. At the same time, after the power-off plate 5 moves, it slides out from the middle of the guide frame 91, and a pair of abutment rods 92 rotate close to each other under the action of the torsion spring and abut against the end of the power-off plate 5 away from the pressing block 6, so as to limit and fix it, that is, lock it. After the staff has repaired the leakage, they press the unlocking block 10 and use the unlocking block 10 to squeeze the abutment rod 92, thereby resetting the abutment rod 92 to the rotating groove, and at the same time press the pressing block 6 to make the power-off plate 5 reset and slide, and place the conductive block 52 back between the pair of wiring tubes 4, while the insulating block 51 is re-stuck between the abutment rods 92 and located inside the guide frame 91.

[0042] It can be seen from the above technical solutions that the present invention has the following beneficial effects:

[0043] In this solution, when there is a leakage, the electromagnetic plate 7 is activated and attracts the magnetic plate 8, causing the power-off plate 5 to move and disconnect the connection between the wiring tube 4 and the conductive block 52, thereby automatically disconnecting the power supply. At the same time, the self-locking frame 9 uses the abutment rod 92 and the torsion spring to lock the power-off plate 5 to ensure that the power is kept off before the power is restored. The functional protective cover 3, including the conductive inner plate 31 and the insulating outer shell 32, not only effectively conducts the leakage current, but also protects the operator's safety. In addition, the insulating plate of the magnetic plate 8 effectively prevents misoperation. The convenience of operation is provided by the pressing block 6 with rubber pads and the unlocking block 10, and the drying ring 111 and the heating ring 112 of the sealing ring ensure that the equipment resists moisture erosion, thereby simplifying maintenance and low cost. At the same time, the reusable nature of the torsion spring and the abutment rod 92 reduces the maintenance frequency and extends the service life of the equipment, thereby effectively improving the overall safety.

[0044] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0045] In addition, it should be understood that although the present specification is described according to embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that those skilled in the art can understand.

Claims

1. An external circuit breaker for an electric energy meter with a leakage self-locking function, characterized in that: The utility model comprises an electric energy meter body (1), wherein the lower end of the electric energy meter body (1) is fixedly connected to a circuit breaker body (2), the rear end of the circuit breaker body (2) is fixedly connected to a functional protection cover (3), the upper and lower ends of the functional protection cover (3) are fixedly connected to wiring tubes (4), and the wiring tubes (4) penetrate the functional protection cover (3), the functional protection cover (3) is slidably connected to a power-off plate (5), and the power-off plate (5) is located between a pair of wiring tubes (4), and the outer end of the functional protection cover (3) is provided with a A pair of through holes are respectively slidably connected with a pressing block (6) and an unlocking block (10), and the pressing block (6) is fixedly connected to the power-off plate (5). An electromagnetic plate (7) is fixedly connected to the inner wall of the functional protection cover (3) on the side close to the pressing block (6), and a magnetic attraction plate (8) is fixedly connected to the outer end of the power-off plate (5). A self-locking frame (9) is fixedly connected to the inner end of the functional protection cover (3) on the side close to the unlocking block (10), and the self-locking frame (9) is located at the outer end of the power-off plate (5) and is slidably connected thereto.

2. The external circuit breaker of an electric energy meter with a leakage self-locking function according to claim 1, characterized in that: The functional protection cover (3) comprises a conductive inner plate (31), the outer end of the conductive inner plate (31) is fixedly connected to an insulating outer shell (32), and the electromagnetic plate (7) is fixedly connected to the inner wall of the conductive inner plate (31).

3. The external circuit breaker of an electric energy meter with a leakage self-locking function according to claim 1, characterized in that: The wiring tube (4) comprises a wire sleeve (41), the wire sleeve (41) is fixedly connected in the through hole, one end of the wire sleeve (41) close to the power-off plate (5) is fixedly connected to a conductive sheet (42), a circular hole is provided in the middle of the conductive sheet (42), and a winding copper rod (43) is fixedly connected to the inner end of the circular hole.

4. The external circuit breaker of an electric energy meter with leakage self-locking function according to claim 3 is characterized in that: The power cut-off plate (5) comprises an insulating block (51), the insulating block (51) is slidably connected inside the functional protection cover (3), and the insulating block (51) is fixedly connected to the pressing block (6), a conductive block (52) is fixedly connected in the middle of the insulating block (51), and the conductive block (52) is in abutment with a pair of conductive sheets (42).

5. The external circuit breaker of an electric energy meter with leakage self-locking function according to claim 4, characterized in that: The self-locking frame (9) comprises a guide frame (91), the guide frame (91) is fixedly connected to the inner wall of the conductive inner plate (31), a pair of rotation grooves are provided at the inner end of the conductive inner plate (31), abutment rods (92) are rotatably connected to the inner ends of the rotation grooves, and the pair of abutment rods (92) are respectively located at the upper and lower ends of the insulating block (51) and abut against it.

6. The external circuit breaker of an electric energy meter with leakage self-locking function according to claim 5, characterized in that: A torsion spring is installed at the rotational connection between the abutment rod (92) and the guide frame (91), and the rotation angle of the abutment rod (92) is 15°. The abutment portion between the abutment rod (92) and the insulating block (51) is in an arc shape.

7. The external circuit breaker of an electric energy meter with a leakage self-locking function according to claim 1, characterized in that: The outer ends of the pressing block (6) and the unlocking block (10) are both inlaid with sealing rings (11), the sealing ring (11) comprises a drying ring (111), and the outer end of the drying ring (111) is fixedly connected to a heating ring (112).

8. The external circuit breaker of an electric energy meter with leakage self-locking function according to claim 7, characterized in that: The drying ring (111) is an annular gauze bag, and the drying ring (111) is filled with water-absorbing particles.

9. The external circuit breaker of an electric energy meter with leakage self-locking function according to claim 1, characterized in that: The pressing block (6) and the unlocking block (10) are both fixedly connected to a rubber pad (12) at one end away from the power-off plate (5).

10. The external circuit breaker of an electric energy meter with leakage self-locking function according to claim 1, characterized in that: An insulating plate is fixedly connected to one end of the magnetic attraction plate (8) close to the wiring tube (4).

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