Meter position harmonic isolation device for automatic verification assembly line of electric energy meter

Abstract

The invention discloses a meter position harmonic isolation device for an automatic verification assembly line of an electric energy meter, and the device comprises a harmonic current switching-on and switching-off device which comprises a static side arc striking assembly part and a movable side arc striking assembly part. The static side arc striking assembly part comprises a plug-in mounting seat and an arc striking bent plate, the plug-in mounting seat is fixedly connected with a self-resetting arc striking rod through a two-way spring bolt, symmetrical sliding rail grooves are formed in the two sides of the plug-in mounting seat, the sliding rail grooves are arranged in an asymmetrical trapezoidal cross section mode, a T-shaped plug is arranged at the tail end of the self-resetting arc striking rod, and the T-shaped plug is connected with the self-resetting arc striking rod. The T-shaped plug is locked through a bidirectional spring bolt after being inserted into the sliding rail groove, and the arc striking bent plate is fixedly connected with a buffer seat module through a bolt detachable structure; by means of the modular design, the modules can be disassembled, assembled and replaced when damaged again, a main structure does not need to be disassembled, the maintenance time is greatly shortened, the shutdown cost is reduced, self-reset arc striking rods with different lengths can be replaced or the position of the split type holding clamp can be adjusted, and the device can adapt to equipment of various types.

Description

Technical Field

[0001] This invention relates to the field of switch technology, specifically to a harmonic isolation device for meter positions used in automated calibration lines for electricity meters. Background Technology

[0002] Due to its advantages such as long transmission distance, large transmission capacity, low line loss, and ease of control and regulation, DC transmission is increasingly widely used in my country's power system. Outdoor DC disconnect switches, acting as air-break switches, primarily provide electrical isolation to high-voltage electrical equipment under no-load conditions. DC disconnect switches installed at the high-voltage end of DC filters also need to have a certain ability to interrupt harmonic currents.

[0003] For example, Chinese Patent Application No. CN201810411729.6 discloses a harmonic isolation device for an automated verification line of an electricity meter. The DC disconnect switch includes a stationary contact and a conductive switch. The conductive switch includes an upper conductive tube. A stationary side arc ignition assembly is provided on the side of the stationary contact near the conductive switch, and a moving side arc ignition assembly is provided on the upper conductive tube. The stationary side arc ignition assembly includes a stationary side arc ignition seat and a self-resetting arc ignition rod. A stationary side stop is provided on the side of the self-resetting arc ignition rod facing away from the conductive switch. The moving side arc ignition assembly includes a moving side arc ignition seat and a self-resetting arc ignition arm. The swing plane of the self-resetting arc ignition arm is perpendicular to the swing plane of the self-resetting arc ignition rod. A moving side stop is provided on the side of the self-resetting arc ignition arm near the stationary contact. The self-resetting arc ignition arm has a conductive end for conductive contact with the self-resetting arc ignition rod and intersecting the swing plane of the self-resetting arc ignition rod. The hinge part of the self-resetting arc ignition arm is located outside the swing plane of the self-resetting arc ignition rod. Compared to existing technologies, the main contacts of disconnecting switches are less susceptible to erosion by harmonic currents. However, in actual use, both the stationary and moving side arc-starting assemblies are fixed connections, and vulnerable components such as arc-starting rods, rollers, or torsion springs are not easy to disassemble. After damage, the main contacts need to be disassembled and replaced as a whole, resulting in complex maintenance procedures and long downtime, making it difficult to meet the needs of modern power equipment for efficient assembly line maintenance. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a harmonic isolation device for meter positions used in automated verification lines for electricity meters.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: This invention discloses a harmonic isolation device for an automated calibration line of electricity meters, comprising a harmonic current interruption device, which includes a stationary arc-initiating assembly and a dynamic arc-initiating assembly. The stationary arc-initiating assembly includes a socket and an arc-initiating bending plate. A self-resetting arc-initiating rod is fixedly connected to the socket via a bidirectional spring pin. Symmetrical slide rail grooves are provided on both sides of the socket, and the slide rail grooves are asymmetrical trapezoidal cross-sections. A T-shaped plug is provided at the end of the self-resetting arc-initiating rod. After the T-shaped plug is inserted into the slide rail groove, it is locked by a bidirectional spring pin. A buffer seat module is fixedly connected to the arc-initiating bending plate via a bolt-removable structure. The removable structure includes a through-hole... The positioning block of the arc-initiating bending plate is equipped with a first spring pin; the moving side arc-initiating assembly includes a split clamp, which is fixed to the upper conductive pipe by high-strength bolts, and the inner wall of the split clamp is embedded with a conductive graphite layer; the outer wall of the split clamp is detachably connected to a mounting plate, the outer wall of the mounting plate is provided with a dovetail interface block, the outer wall of the split clamp is provided with a dovetail interface groove that matches the dovetail interface block, the side wall of the mounting plate is provided with a limiting connecting plate, the limiting connecting plate is embedded with a second spring pin, the outer wall of the split clamp is provided with a limiting groove that matches the pin of the second spring pin; a pre-installed roller module is installed on the mounting plate.

[0006] As a preferred embodiment of the present invention, the buffer seat module includes a fixed plate, a telescopic rod in the middle of the fixed plate, a stop plate at the end of the telescopic rod, and a buffer spring sleeved on the telescopic rod.

[0007] As a preferred embodiment of the present invention, the pre-installed roller module includes a mounting rod, a pin, and a tension spring mounted on a mounting plate. The outer end of the mounting rod is provided with a roller, and the roller is electrically connected to the split clamp via a conductive connection. The outer circumferential surface of the roller is provided with a spiral contact surface.

[0008] As a preferred embodiment of the present invention, the harmonic current interruption device further includes a monitoring module for real-time monitoring of the self-resetting arc-starting rod. The monitoring module includes a temperature sensor, a displacement sensor, and a vibration sensor. The temperature sensor is attached to the surface of the self-resetting arc-starting rod, the roller, and the stationary contact. The displacement sensor is installed at one end of the self-resetting arc-starting rod near the swing shaft. The vibration sensor is installed on the support point of the upper conductive tube.

[0009] As a preferred embodiment of the present invention, the static side arc-starting assembly further includes a welding bracket, a mandrel is provided inside the welding bracket, an insulating bushing is fitted on the mandrel, torsion springs located on both sides of the insert seat are fitted on the insulating bushing, an aluminum alloy bracket is mounted on the mandrel, a stepper motor for driving the torsion springs is mounted on the aluminum alloy bracket, a worm gear mechanism is provided on the aluminum alloy bracket, the output shaft of the stepper motor is connected to one end of the worm of the worm gear mechanism, and the central shaft of the worm wheel of the worm gear mechanism is connected to one end of the torsion spring.

[0010] As a preferred embodiment of the present invention, the harmonic current interruption device further includes a control unit, which is electrically connected to a stepper motor via a stepper driver.

[0011] As a preferred embodiment of the present invention, the insert socket has an integrated conductive copper sheet inside, which abuts against the T-shaped plug of the self-resetting arc-inducing rod.

[0012] As a preferred embodiment of the present invention, the inclination angle of the dovetail interface groove is set to... Furthermore, the surface of the dovetail joint block is coated with a wear-resistant coating.

[0013] As a preferred embodiment of the present invention, the temperature sensor is any one of a thin-film thermocouple or an infrared temperature measurement module, the displacement sensor is any one of a linear variable differential transformer or an optical encoder, and the vibration sensor is a piezoelectric accelerometer.

[0014] As a preferred embodiment of the present invention, the harmonic isolation device further includes a stationary contact and an upper conductive tube.

[0015] The beneficial effects of this invention are: 1. This type of meter position harmonic isolation device for automated verification lines of electricity meters utilizes modular design for both static and dynamic arc-initiating components. Each component can be pre-assembled on the production line and independently inspected. Specifically, the self-resetting arc-initiating rod, through a T-type plug and slide rail groove, can be fixedly connected to the insertion seat and then locked with a bidirectional spring pin. The buffer seat module is fixedly connected to the arc-initiating bending plate via a detachable structure. The dynamic arc-initiating component is fixedly installed on the upper conductive pipe using a split clamp and high-strength bolts. The mounting plate is inserted through a dovetail interface block. Once the dovetail interface groove on the split clamp is inserted and the pin of the second spring pin matches the limiting groove, the mounting plate can be fixed, and the pre-installed roller module can be installed. The modular design allows for disassembly and replacement of each module when it is damaged, without disassembling the main structure, which greatly shortens maintenance time and reduces downtime costs. Different lengths of self-resetting arc-guiding rods can be replaced or the position of the split clamp can be adjusted, making it suitable for various models of equipment. This design greatly simplifies the disassembly and assembly steps, shortens maintenance time, and is suitable for automated assembly line maintenance scenarios.

[0016] 2. This type of harmonic isolation device for automated energy meter calibration lines uses a temperature sensor to monitor the temperature changes of the self-resetting arc-initiating rod, roller, and main contact surface in real time. A displacement sensor measures the swing angle of the self-resetting arc-initiating rod, and a vibration sensor monitors the instantaneous impact force when the self-resetting arc-initiating rod contacts the roller, as well as abnormal vibrations caused by component loosening or wear during long-term operation. This allows for timely reminders to operators for maintenance, achieving intelligent monitoring and dynamic optimization of the harmonic current interruption device. This significantly improves the reliability and maintenance efficiency of the DC disconnect switch, reduces the frequency of manual maintenance, enhances the device's reliability, enables preventative maintenance, and avoids damage to the main contacts due to excessive component wear. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the structure of a harmonic isolation device for an automated calibration line of electricity meters according to the present invention; Figure 2 This invention relates to a harmonic isolation device for meter positions used in an automated calibration production line for electricity meters. Figure 1 Enlarged structural diagram at point A in the middle; Figure 3 This is an enlarged structural schematic diagram of the static side arc-starting assembly of a meter position harmonic isolation device for an automated verification production line of an electricity meter according to the present invention; Figure 4 This is an enlarged structural diagram of the split clamp and pre-installed roller module connection of a meter position harmonic isolation device for an automated verification line of electricity meters according to the present invention. Figure 5 This is an enlarged schematic diagram of the pre-installed roller module connection structure of a meter position harmonic isolation device for an automated verification line of an electricity meter according to the present invention; Figure 6 This is an enlarged schematic diagram of the stepper motor and spindle connection structure of a meter position harmonic isolation device for an automated verification line of an electricity meter according to the present invention; Figure 7 This is a cross-sectional view of the insertion base structure of a harmonic isolation device for an automated verification line of electricity meters according to the present invention. Figure 8 This is a structural block diagram of a harmonic isolation device for an automated calibration line of electricity meters according to the present invention.

[0018] In the diagram: 1. Stationary contact; 2. Upper conductive tube; 3. Harmonic current interruption device; 4. Stationary side arc ignition assembly; 5. Moving side arc ignition assembly; 6. Insert socket; 7. Arc ignition bend plate; 8. Bidirectional spring pin; 9. Self-resetting arc ignition rod; 10. Slide rail groove; 11. T-type plug; 12. Buffer seat module; 13. Fixing plate; 14. Telescopic rod; 15. Stop plate; 16. Buffer spring; 17. Split-type clamp; 18. High-strength bolt; 19. Conductive graphite layer; 20. Mounting plate; 21. Dovetail interface block; 22. Dovetail interface groove; 23. 24. Pre-installed roller module; 25. Mounting rod; 26. Pin; 27. Tension spring; 28. Roller; 29. ​​Conductive strip; 30. Monitoring module; 31. Temperature sensor; 32. Displacement sensor; 33. Vibration sensor; 34. Welding bracket; 35. Mandrel; 36. Insulating bushing; 37. Torsion spring; 38. Aluminum alloy bracket; 39. Stepper motor; 404. Control unit; 41. Conductive copper sheet; 42. Worm gear mechanism; 43. Positioning block; 44. First spring pin; 45. Limiting plate; 46. Second spring pin; 47. Stop shaft. Detailed Implementation

[0019] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0020] Example: Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 7As shown, this invention discloses a harmonic isolation device for an automated verification line of an electricity meter, comprising a harmonic current interruption device 3, wherein the harmonic current interruption device 3 includes a stationary side arc-initiating assembly 4 and a moving side arc-initiating assembly 5; the stationary side arc-initiating assembly 4 includes an insertion seat 6 and an arc-initiating bending plate 7, wherein a self-resetting arc-initiating rod 9 is fixedly connected to the insertion seat 6 by a bidirectional spring pin 8, and symmetrical slide rail grooves 10 are provided on both sides of the insertion seat 6, the slide rail grooves 10 being asymmetrical trapezoidal cross-sections, and a T-shaped plug 11 is provided at the end of the self-resetting arc-initiating rod 9, which is locked by the bidirectional spring pin 8 after being inserted into the slide rail groove 10. The arc-initiating bending plate 7 is provided with a detachable structure A buffer seat module 12 is fixedly connected. The detachable structure includes a positioning block 42 that passes through the arc-inducing bending plate 7. A first spring pin 43 is embedded in the positioning block 42. A rectangular hole is opened on the arc-inducing bending plate 7 for the positioning block 42 to pass through. The moving side arc-inducing assembly 5 includes a split clamp 17, which is fixed to the upper conductive tube 2 by high-strength bolts 18. The inner wall of the split clamp 17 is embedded with a conductive graphite layer 19 to reduce contact resistance. The outer wall of the split clamp 17 is detachably connected to a mounting plate 20. The outer wall of the mounting plate 20 is provided with a dovetail interface block 21, and the outer wall of the split clamp 17 is provided with a matching dovetail interface block 21. The dovetail interface groove 22, the side wall of the mounting plate 20 is provided with a limiting connecting plate 44, the limiting connecting plate 44 is embedded with a second spring pin 45, the outer wall of the split clamp 17 is provided with a limiting groove that matches the pin of the second spring pin 45; the mounting plate 20 is equipped with a pre-installed roller module 23, and the static side arc ignition assembly 4 and the dynamic side arc ignition assembly 5 are modularly designed, wherein the self-resetting arc ignition rod 9 can be fixedly connected to the insertion seat 6 by the cooperation of the T-type plug 11 and the slide rail groove 10, and then locked with the bidirectional spring pin 8, the buffer seat module 12 is fixedly connected to the arc ignition bending plate 7 by a detachable structure, and the dynamic side arc ignition assembly... Accessory 5 is fixedly installed on the upper conductive tube 2 by the split clamp 17 and high-strength bolts 18. The mounting plate 20 is inserted into the dovetail interface groove 22 on the split clamp 17 through the dovetail interface block 21. When the pin of the second spring pin 45 matches the limiting groove, the mounting plate 20 can be fixed, and the pre-installed roller 27 module 23 can be installed. The modular design allows for disassembly and replacement of each module when it is damaged, without disassembling the main structure, which greatly shortens the maintenance time and reduces downtime costs. Different lengths of self-resetting arc-inducing rods 9 can be replaced or the position of the split clamp 17 can be adjusted, making it compatible with various models of equipment.

[0021] Specifically, such as Figure 2 and Figure 3As shown, the buffer seat module 12 includes a fixed plate 13, a telescopic rod 14 in the middle of the fixed plate 13, a stop plate 15 at the end of the telescopic rod 14, and a buffer spring 16 sleeved on the telescopic rod 14. When the disconnecting switch is in the open position, the self-resetting arc-inducing rod 9 and the roller 27 are completely disengaged. Under the restriction of the torsion spring 36 and the buffer seat module 12, the top of the self-resetting arc-inducing rod 9 is inclined towards the stationary contact 1. When replacing, it is only necessary to press the pin of the first spring pin 43 on the positioning block 42 to retract the pin of the first spring pin 43, and then separate the positioning block 42 from the arc-inducing bending plate 7. The positioning block 42 on the new buffer seat module 12 is inserted into the rectangular hole on the arc-inducing bending plate 7. Under the elastic force of the first spring pin 43, the pin of the first spring pin 43 extends and retracts, which can complete the limit, avoiding the current situation of using bolt fixed connection, which makes it inconvenient to disassemble and replace.

[0022] Specifically, such as Figure 5 As shown, the pre-installed roller module 23 includes a mounting rod 24, a stop shaft 46, a pin shaft 25, and a tension spring 26 mounted on the mounting plate 20. The outer end of the mounting rod 24 is provided with a roller 27. The roller 27 is electrically connected to the split clamp 17 through a conductive strip 28. The outer circumferential surface of the roller 27 is set as a spiral contact surface. The mounting rod 24, the stop shaft 46, the pin shaft 25, and the tension spring 26 are all mounted on the mounting plate 20. They are pre-installed as independent units and are replaced as a whole after damage. During installation, the split clamp 17 is connected to the outside of the upper conductive tube 2 by high-strength bolts 18. Then, the dovetail interface block 21 on the mounting plate 20 is inserted into the inside of the dovetail interface groove 22, and the pin of the second spring pin 45 is inserted into the inside of the limiting groove, which improves the installation stability.

[0023] Specifically, such as Figure 8As shown, the harmonic current interruption device 3 also includes a monitoring module 29 for real-time monitoring of the self-resetting arc-initiating rod 9. The monitoring module 29 includes a temperature sensor 30, a displacement sensor 31, and a vibration sensor 32. The temperature sensor 30 is attached to the surface of the self-resetting arc-initiating rod 9, the roller 27, and the stationary contact 1. The displacement sensor 31 is installed at the end of the self-resetting arc-initiating rod 9 near the swing shaft. The vibration sensor 32 is installed on the support point of the upper conductive tube 2. Through the provided temperature sensor 30, the temperature of the self-resetting arc-initiating rod 9, the roller 27, and the main contact surface can be monitored in real time. The displacement sensor 31 can measure the swing angle of the self-resetting arc-initiating rod 9, and the vibration sensor 32 can monitor in real time the instantaneous impact force when the self-resetting arc-initiating rod 9 contacts the roller 27 and the abnormal vibration caused by component loosening or wear during long-term operation. This can remind the operator to carry out maintenance, realizing intelligent monitoring and dynamic optimization of the harmonic current interruption device 3, significantly improving the reliability and maintenance efficiency of the DC disconnect switch, reducing the frequency of manual maintenance, improving the reliability of the device, realizing preventive maintenance, and avoiding damage to the main contacts due to excessive wear of components.

[0024] Specifically, such as Figure 3 and Figure 6 As shown, the static side arc-starting assembly 4 also includes a welding bracket 33, a mandrel 34 is provided inside the welding bracket 33, an insulating bushing 35 is fitted on the mandrel 34, and torsion springs 36 located on both sides of the insert seat 6 are fitted on the insulating bushing 35. An aluminum alloy bracket 37 is installed on the mandrel 34, and a stepper motor 38 that drives the torsion springs 36 is installed on the aluminum alloy bracket 37. A worm gear mechanism 41 is provided on the aluminum alloy bracket 37. The output shaft of the stepper motor 38 is connected to one end of the worm of the worm gear mechanism 41, and the central shaft of the worm wheel of the worm gear mechanism 41 is connected to one end of the torsion spring 36.

[0025] The harmonic current interruption device 3 further includes a control unit 39, which is electrically connected to the stepper motor 38 via a stepper driver.

[0026] Specifically, such as Figure 7 As shown, the insert 6 has an integrated conductive copper sheet 40 inside, which abuts against the T-shaped plug 11 of the self-resetting arc-inducing rod 9.

[0027] The inclination angle of the dovetail interface groove 22 is set to Furthermore, the surface of the dovetail interface block 21 is coated with a wear-resistant coating, which can play a wear-resistant role.

[0028] Specifically, such as Figure 8As shown, the temperature sensor 30 is either a thin-film thermocouple or an infrared temperature measurement module, the displacement sensor 31 is either a linear variable differential transformer or an optical encoder, and the vibration sensor 32 is a piezoelectric accelerometer.

[0029] The harmonic isolation device also includes a stationary contact 1 and an upper conductive tube 2.

[0030] During operation, this type of meter position harmonic isolation device used in the automated verification line of electricity meters utilizes a modular design for the static side arc-initiating assembly 4 and the dynamic side arc-initiating assembly 5. The self-resetting arc-initiating rod 9, through the cooperation of the T-type plug 11 and the slide rail groove 10, can be fixedly connected to the insertion seat 6 and then locked with a bidirectional spring pin 8. The buffer seat module 12 is fixedly connected to the arc-initiating bending plate 7 via a detachable structure. The dynamic side arc-initiating assembly 5 is fixedly installed on the upper conductive pipe 2 via a split clamp 17 and high-strength bolts 18. The mounting plate 20 is inserted into the dovetail interface groove 22 on the split clamp 17 via a dovetail interface block 21. With the second spring pin 45 matching the limit groove, the mounting plate 20 can be fixed, allowing the installation of the pre-installed roller 27 module 23. This modular design allows for easy disassembly and replacement of damaged modules without the need for... Disassembling the main structure significantly shortens maintenance time and reduces downtime costs. Different lengths of the self-resetting arc-initiating rod 9 can be replaced, or the position of the split clamp 17 can be adjusted, making it compatible with various equipment models. The temperature sensor 30 monitors real-time temperature changes on the self-resetting arc-initiating rod 9, roller 27, and main contact surface. The displacement sensor 31 measures the swing angle of the self-resetting arc-initiating rod 9, and the vibration sensor 32 monitors the instantaneous impact force when the self-resetting arc-initiating rod 9 contacts the roller 27, as well as abnormal vibrations caused by component loosening or wear during long-term operation. This alerts operators to perform maintenance, achieving intelligent monitoring and dynamic optimization of the harmonic current interruption device 3. This significantly improves the reliability and maintenance efficiency of the DC disconnect switch, reduces the frequency of manual maintenance, enhances the device's reliability, enables preventative maintenance, and avoids damage to the main contacts due to excessive component wear.

[0031] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A harmonic isolation device for meter positions used in an automated calibration line for electricity meters, characterized in that, It includes a harmonic current interruption device (3), which includes a stationary side arc ignition assembly (4) and a dynamic side arc ignition assembly (5). The static side arc-starting assembly (4) includes a plug seat (6) and an arc-starting bending plate (7). A self-resetting arc-starting rod (9) is fixedly connected to the plug seat (6) by a bidirectional spring pin (8). Symmetrical slide rail grooves (10) are provided on both sides of the plug seat (6). The slide rail grooves (10) are asymmetrical trapezoidal cross sections. A T-shaped plug (11) is provided at the end of the self-resetting arc-starting rod (9). After the T-shaped plug (11) is inserted into the slide rail groove (10), it is locked by the bidirectional spring pin (8). A buffer seat module (12) is fixedly connected to the arc-starting bending plate (7) by a detachable structure. The detachable structure includes a positioning block (42) that passes through the arc-starting bending plate (7). A first spring pin (43) is embedded in the positioning block (42). The moving side arc-starting assembly (5) includes a split clamp (17), which is fixed to the upper conductive tube (2) by high-strength bolts (18). The inner wall of the split clamp (17) is embedded with a conductive graphite layer (19). The outer wall of the split clamp (17) is detachably connected to an installation plate (20). The outer wall of the installation plate (20) is provided with a dovetail interface block (21). The outer wall of the split clamp (17) is provided with a dovetail interface groove (22) that matches the dovetail interface block (21). The side wall of the installation plate (20) is provided with a limiting connecting plate (44). The limiting connecting plate (44) is embedded with a second spring pin (45). The outer wall of the split clamp (17) is provided with a limiting groove that matches the pin of the second spring pin (45). The installation plate (20) is equipped with a pre-installed roller module (23).

2. The harmonic isolation device for meter position in an automated calibration line for electricity meters according to claim 1, characterized in that, The buffer seat module (12) includes a fixed plate (13), a telescopic rod (14) is provided in the middle of the fixed plate (13), a stop plate (15) is provided at the end of the telescopic rod (14), and a buffer spring (16) is sleeved on the telescopic rod (14).

3. The meter position harmonic isolation device for an automated calibration line of electricity meters according to claim 1, characterized in that, The pre-installed roller module (23) includes a mounting rod (24), a stop shaft (46), a pin shaft (25) and a tension spring (26) mounted on the mounting plate (20). The outer end of the mounting rod (24) is provided with a roller (27). The roller (27) is electrically connected to the split clamp (17) through a conductive strip (28). The outer circumferential surface of the roller (27) is set as a spiral contact surface.

4. The meter position harmonic isolation device for an automated calibration line of electricity meters according to claim 1, characterized in that, The harmonic current interruption device (3) also includes a monitoring module (29) for real-time monitoring of the self-resetting arc-starting rod (9). The monitoring module (29) includes a temperature sensor (30), a displacement sensor (31), and a vibration sensor (32). The temperature sensor (30) is attached to the surface of the self-resetting arc-starting rod (9), the roller (27), and the stationary contact (1). The displacement sensor (31) is installed at one end of the self-resetting arc-starting rod (9) near the swing shaft. The vibration sensor (32) is installed on the support point of the upper conductive tube (2).

5. The meter position harmonic isolation device for an automated calibration line of electricity meters according to claim 1, characterized in that, The static side arc-starting assembly (4) also includes a welding bracket (33), a mandrel (34) is provided inside the welding bracket (33), an insulating bushing (35) is fitted on the mandrel (34), a torsion spring (36) located on both sides of the insert seat (6) is fitted on the insulating bushing (35), an aluminum alloy bracket (37) is installed on the mandrel (34), a stepper motor (38) that drives the torsion spring (36) is installed on the aluminum alloy bracket (37), a worm gear mechanism (41) is provided on the aluminum alloy bracket (37), the output shaft of the stepper motor (38) is connected to one end of the worm of the worm gear mechanism (41), and the worm wheel center shaft of the worm gear mechanism (41) is connected to one end of the torsion spring (36).

6. The meter position harmonic isolation device for an automated calibration line of an electricity meter according to claim 5, characterized in that, The harmonic current interruption device (3) also includes a control unit (39), which is electrically connected to the stepper motor (38) via a stepper driver.

7. The meter position harmonic isolation device for an automated calibration line of electricity meters according to claim 1, characterized in that, The insert (6) has an integrated conductive copper sheet (40) inside, which abuts against the T-shaped plug (11) of the self-resetting arc-starting rod (9).

8. The meter position harmonic isolation device for an automated calibration line of electricity meters according to claim 1, characterized in that, The inclination angle of the dovetail joint groove (22) is set to Furthermore, the surface of the dovetail interface block (21) is coated with a wear-resistant coating.

9. A harmonic isolation device for meter position in an automated calibration line for electricity meters according to claim 4, characterized in that, The temperature sensor (30) is either a thin-film thermocouple or an infrared temperature measurement module, the displacement sensor (31) is either a linear variable differential transformer or an optical encoder, and the vibration sensor (32) is a piezoelectric accelerometer.

10. A harmonic isolation device for meter position in an automated verification line for electricity meters according to any one of claims 1-9, characterized in that, The harmonic isolation device also includes a stationary contact (1) and an upper conductive tube (2).

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