Electric energy metering box insulation performance detection equipment

Abstract

The invention relates to the technical field of electric energy metering equipment detection, and discloses electric energy metering box insulation performance detection equipment which comprises a detection assembly, an adjusting assembly and a limiting assembly. The detection assembly comprises a box body, a detection host and a detection pen, the box body is composed of a first plate and a second plate which are vertically symmetrical, the detection host is fixed to the first plate, and the detection pen is communicated with the detection host through a connecting wire. The adjusting assembly is movably installed on the second plate block through the first connecting plate, and position adjustment is achieved through cooperation of the damping sliding groove and the T-shaped connecting block. The limiting assembly comprises a limiting strip, a strip collecting roller, double springs and a strip adjuster, and the detection pens with different diameters are elastically clamped through linkage of the double springs. When the box body is closed, a fixing mechanism is automatically triggered, and modular maintenance is achieved through a limiting bolt and a fixing nut. According to the scheme, the problems that traditional equipment is poor in adaptability, tedious in operation, insufficient in protection and difficult to maintain are solved, and the equipment compatibility and convenience are improved.

Description

Technical Field

[0001] This invention relates to the field of electrical energy metering equipment testing technology, specifically to an electrical energy metering box insulation performance testing device. Background Technology

[0002] In the field of insulation performance testing of electricity metering boxes, the cooperation between the testing pen and the host is the core operating mode, but its storage has long been a technical pain point.

[0003] Existing equipment typically uses fixed-size storage slots for the test pens, which presents three major problems: First, poor adaptability, only accommodating test pens of specific lengths and diameters, and unable to stably store test pens of different specifications or varying thicknesses; second, cumbersome operation, requiring manual adjustment of clips or clamps to secure the test pens, extending the testing process time; third, insufficient protection, as rigid contact or loose placement can easily lead to damage to the test pens during movement due to impacts, shortening the equipment's lifespan; and fourth, difficult maintenance, as the storage components are highly integrated with the equipment body, requiring complete disassembly for maintenance, increasing maintenance costs.

[0004] Therefore, an insulation performance testing device for an electricity metering box is proposed. This device achieves stepless adjustment of the test pen's length through the cooperation of a damping groove and a T-shaped connecting block; it utilizes a dual-spring linkage structure (a first spring drives the strip adjuster, and a second spring controls the take-up roller) to achieve elastic clamping of test pens of different diameters; it employs a box-closure trigger-type fixing mechanism to simplify the operation process; and it achieves modular maintenance of components through the detachable connection of limit bolts and fixing nuts. This technology overcomes the limitations of traditional fixing structures and significantly improves the device's compatibility, convenience, and durability. Summary of the Invention

[0005] Technical problems to be solved

[0006] Existing equipment typically uses fixed-size storage slots for the test pens, which presents three major problems: First, poor adaptability, only accommodating test pens of specific lengths and diameters, and unable to stably store test pens of different specifications or varying thicknesses; second, cumbersome operation, requiring manual adjustment of clips or clamps to secure the test pens, extending the testing process time; third, insufficient protection, as rigid contact or loose placement can easily lead to damage to the test pens during movement due to impacts, shortening the equipment's lifespan; and fourth, difficult maintenance, as the storage components are highly integrated with the equipment body, requiring complete disassembly for maintenance, increasing maintenance costs.

[0007] Technical solution

[0008] To achieve the above-mentioned objectives, the present invention provides the following technical solution: an insulation performance testing device for an electricity metering box. This device includes a testing component, an adjustment component, and a limiting component. The testing component includes a housing, a testing host, and a testing pen. The housing includes a first plate and a second plate symmetrically arranged vertically. The testing host is fixedly mounted on the lower first plate. A connecting wire is fixedly connected between the testing pen and the housing, and the connecting wire communicates with the testing host. A first connecting plate is movably mounted on the second plate. Symmetrically arranged damping grooves are formed on both sides of the first connecting plate. The adjustment component is movably mounted... The adjusting assembly, mounted on the first connecting plate, includes a second connecting plate. The second connecting plate has strip grooves on both sides, and strip compartments are fixedly installed at both ends of the second connecting plate. The strip compartments are square shells. The limiting assembly includes a limiting strip, a strip cylinder, a fixing rod, and a second spring. The two ends of the fixing rod are fixedly installed between the second connecting plate and the strip compartment. The two ends of the limiting strip are respectively connected to the strip cylinders at both ends of the second connecting plate. A take-up roller is fixedly installed in the middle of the strip cylinder. The take-up roller is cylindrical, and its two ends are movably connected to the fixing rod. The two ends of the second spring are respectively fixedly installed on the fixing rod and the take-up roller.

[0009] Furthermore, the second plate has a groove, and a limit bolt is fixedly installed on each side of the groove. The first connecting plate has holes on both sides corresponding to the limit bolts, and a fixed nut is threadedly connected above the limit bolt.

[0010] Furthermore, a connecting block is fixedly installed on the strip groove. The connecting block is T-shaped and movably installed in the damping groove.

[0011] Furthermore, a cover plate is fixedly installed on the outer side of the second connecting plate and the strip compartment. A guide roller is movably installed on the upper part of the cover plate, and two guide rollers are movably installed on the lower part of the cover plate, with the limiting strip movably installed between the two guide rollers.

[0012] Furthermore, a row of circular holes is provided on the second connecting plate, and a row of strip adjusters is provided below the second connecting plate. Limiting rods are movably installed in the circular holes, and limiting blocks are fixedly installed on the top of the limiting rods. The limiting blocks are located on one side of the second connecting plate.

[0013] Furthermore, among the strip adjusters in the row, the strip adjusters located at the outermost positions are fixedly installed with connecting rods between them and the strip grooves, and the remaining strip adjusters are fixedly connected to the bottom of the limiting rods respectively. A first spring is provided between the strip adjuster and the second connecting plate, which is sleeved on the outside of the limiting rod.

[0014] Furthermore, the upper half of the strip adjuster is square, and the lower half of the strip adjuster is semi-elliptical. A groove is provided at the bottom of the strip adjuster, and the two sides of the groove are rounded.

[0015] Furthermore, the limiting strip is movably connected to the groove at the bottom of the strip adjuster. The protruding parts on both sides of the groove at the bottom of the strip adjuster are rounded and limit the two sides of the limiting strip. The surface of the limiting strip is provided with anti-slip texture.

[0016] Beneficial effects

[0017] Compared with the prior art, the present invention provides an insulation performance testing device for an electricity metering box, which has the following beneficial effects:

[0018] 1. This solution achieves compatibility with various specifications of testing pens through a unique structural design. In the adjustment assembly, the damping cooperation between the T-shaped connecting block and the damping groove allows the second connecting plate to be freely adjusted in position to accommodate testing pens of different lengths. In the limiting assembly, the second spring can dynamically adjust the length of the limiting strip with the help of the take-up roller, while the first spring drives the strip adjuster to adaptively conform to the surface of the testing pen. The combined effect of both not only stably clamps testing pens of different diameters but also accommodates testing pens of varying thicknesses, breaking the limitation of traditional equipment that only uses one slot per purpose.

[0019] 2. This solution incorporates a "closed-trigger fixing structure," which secures the testing pen simply by closing the housing. After the pen is inserted, the closing of the housing compresses the limiting strip, causing the strip cylinder to rotate and triggering the second spring to store energy. Simultaneously, the strip adjuster compresses the first spring, creating a bidirectional elastic clamping force. The entire process requires no manual intervention, significantly reducing operation time and improving overall testing efficiency.

[0020] 3. This solution utilizes a "three-stage buffer structure" to provide active protection for the testing pen. The anti-slip texture on the surface of the limiting strip increases friction, preventing axial slippage of the testing pen; the first spring provides elastic clamping force, avoiding damage to the testing pen caused by rigid compression; the second spring generates pre-tension torque, keeping the strip taut at all times and buffering radial vibration. This structure effectively reduces the damage rate of the testing pen, extends its service life, and solves the problem of insufficient protection in traditional storage methods.

[0021] 4. In this solution, the modular separation of the adjustment component and the housing is achieved through a detachable connection method of "limiting bolt + fixing nut". Simply unscrew the fixing nut to remove the first connecting plate along with the adjustment component and the limiting component as a whole, which greatly simplifies the replacement or maintenance process of individual components, improves maintenance efficiency, and reduces the maintenance cost of the equipment throughout its entire life cycle. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the internal structure of the box body of the present invention;

[0024] Figure 3 This is a schematic diagram of the second section structure of the present invention;

[0025] Figure 4 This is a schematic diagram of the internal structure of the second section of the present invention;

[0026] Figure 5 This is a schematic diagram of the first connecting plate structure of the present invention;

[0027] Figure 6 This is a schematic diagram of the structure of the adjusting component and the limiting component of the present invention;

[0028] Figure 7 This is a schematic diagram of the connecting block structure of the present invention;

[0029] Figure 8 This is a schematic diagram of the internal structure of the strip groove of the present invention;

[0030] Figure 9 This is a schematic diagram of the second connecting plate structure of the present invention;

[0031] Figure 10 This is a schematic diagram of the strip regulator structure of the present invention;

[0032] Figure 11 This is a schematic diagram of the strip tube structure of the present invention;

[0033] Figure 12 This is a schematic diagram of the fixing rod structure of the present invention.

[0034] In the diagram: 10. Box body; 11. First plate; 12. Second plate; 13. Detection host; 14. Connecting wire; 15. Detection pen; 16. Limiting bolt; 17. Fixing nut; 18. First connecting plate; 19. Damping groove; 20. Second connecting plate; 21. Strip compartment; 22. Connecting block; 23. Cover plate; 24. Strip groove; 25. Limiting rod; 26. Strip adjuster; 27. Limiting block; 28. First spring; 29. ​​Connecting rod; 30. Limiting strip; 31. Strip cylinder; 32. Take-up roller; 33. Fixing rod; 34. Second spring; 35. Guide roller. Detailed Implementation

[0035] To more clearly illustrate the overall concept of the present invention, a detailed description is provided below with reference to the accompanying drawings and examples.

[0036] In the description of this invention, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0037] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0038] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0039] In this invention, unless otherwise explicitly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0040] Please see Figures 1-12 This invention proposes a device for testing the insulation performance of an electricity metering box.

[0041] This equipment comprises three core components: a detection component, an adjustment component, and a limiting component. The detection component, as the basic functional module, plays a crucial role in insulation performance testing and providing a mounting base for other components. The housing 10 serves as the outer shell and carrier of the entire equipment, consisting of a first plate 11 and a second plate 12 arranged symmetrically. This symmetrical structure not only ensures a neat appearance but, more importantly, provides symmetrical space for storing the detection pen 15, guaranteeing stability during storage. The detection host 13, as the core of the detection function, is fixedly mounted on the lower first plate 11. It integrates complex circuitry and an analysis system, enabling rapid processing and analysis of detected signals and displaying relevant parameters through its own display device, providing operators with intuitive test results.

[0042] The testing pen 15 is the component that directly contacts the electricity metering box for testing. It is fixedly connected to the box body 10 via a connecting wire 14, which is also connected to the testing host 13. This connection method ensures that the testing signal acquired by the testing pen 15 can be transmitted to the testing host 13 in real time and accurately. The length of the connecting wire 14 is carefully designed to ensure that the testing pen 15 has sufficient range of motion, making it convenient for operators to perform testing in different positions, while avoiding tangling or inconvenience due to excessive length.

[0043] The adjustment component is key to enabling the device to adapt to detection pens 15 of different lengths. It is movably mounted on the first connecting plate 18 and can be flexibly adjusted in position according to the length of the detection pen 15. The first connecting plate 18 is movably mounted on the second plate 12, and its connection method with the second plate 12 is unique and reliable. The second plate 12 has slots, with a limit bolt 16 fixedly installed on each side of the slot. The first connecting plate 18 has holes on both sides corresponding to the limit bolts 16. After the limit bolts 16 pass through these holes, a fixing nut 17 is threadedly connected to their top. This connection structure allows the first connecting plate 18 to be stably mounted on the second plate 12. Furthermore, when the first connecting plate 18 needs to be disassembled or adjusted, it can be removed from the limit bolts 16 simply by unscrewing the fixing nut 17. This modular installation and disassembly of the adjustment and limit components greatly facilitates equipment maintenance and repair.

[0044] The first connecting plate 18 has symmetrically arranged damping grooves 19 on both sides, providing a track for the movement of the adjustment component. The adjustment component includes a second connecting plate 20, with strip grooves 24 on both sides. Connecting blocks 22 are fixedly installed on the strip grooves 24. The connecting blocks 22 are T-shaped and movably installed in the damping grooves 19. The T-shaped connecting blocks 22 and the damping grooves 19 fit very precisely, ensuring that the connecting blocks 22 slide smoothly in the damping grooves 19 and can stop at any position through damping. When the position of the second connecting plate 20 needs to be adjusted, simply push the second connecting plate 20, and the connecting blocks 22 on both sides will move along the damping grooves 19 until they reach the appropriate position, thereby achieving adaptation to detection pens 15 of different lengths.

[0045] The second connecting plate 20 has strip compartments 21 fixedly installed at both ends. The strip compartments 21 are square shells that not only provide installation space for some components of the limiting assembly but also protect these components from interference or damage caused by external dust, debris, etc. Cover plates 23 are fixedly installed on the outer sides of the second connecting plate 20 and the strip compartments 21. Cover plates 23 further enhance the protection of the internal components. A guide roller 35 is movably installed on the upper part of the cover plate 23, and two guide rollers 35 are movably installed on the lower part. The limiting strip 30 is movably installed between the two lower guide rollers 35. The guide rollers 35 provide good guidance for the movement direction of the limiting strip 30, ensuring that the limiting strip 30 moves along a preset trajectory during operation, avoiding problems such as deviation or entanglement.

[0046] The main function of the limiting component is to fix and limit the detection pen 15, ensuring that it will not shift or be bumped during storage. It includes a limiting strip 30, strip cylinders 31, a fixing rod 33, and a second spring 34. The two ends of the fixing rod 33 are fixedly installed between the second connecting plate 20 and the strip cylinder 21, providing stable support for the entire limiting component. The two ends of the limiting strip 30 are connected to the strip cylinders 31 at both ends of the second connecting plate 20. A take-up roller 32 is fixedly installed in the middle of the strip cylinder 31. The take-up roller 32 is cylindrical, and its two ends are movably connected to the fixing rod 33, allowing it to rotate freely around the fixing rod 33. The two ends of the second spring 34 are fixedly installed on the fixing rod 33 and the take-up roller 32. When the take-up roller 32 rotates, the second spring 34 deforms, generating elastic potential energy, providing power for tightening the limiting strip 30.

[0047] A row of circular holes is provided on the second connecting plate 20. A limit rod 25 is movably installed in the circular holes. A limit block 27 is fixedly installed on the top of the limit rod 25, and the limit block 27 is located on one side of the second connecting plate 20. The setting of the limit block 27 effectively prevents the limit rod 25 from falling out of the circular holes, ensuring the stability of the limit rod 25 during operation. A row of strip adjusters 26 is provided below the second connecting plate 20. The strip adjusters 26 located at the outermost positions of the row of strip adjusters 26 are fixedly installed with connecting rods 29 between them and the strip grooves 24. The remaining strip adjusters 26 are fixedly connected to the bottom of the limit rods 25, and a first spring 28 is provided between the strip adjusters 26 and the second connecting plate 20, which is sleeved on the outside of the limit rods 25.

[0048] The strip adjuster 26 features an ingenious structural design, with a square upper half and a semi-elliptical lower half. A groove is formed at the bottom, with rounded corners on both sides. This shape not only facilitates integration with other components but also effectively reduces wear on the limiting strip 30. The limiting strip 30 is movably connected to the groove at the bottom of the strip adjuster 26. The rounded corners of the protruding parts on both sides of the groove at the bottom of the strip adjuster 26 limit the movement of the limiting strip 30, ensuring it does not deviate from its track during movement. Simultaneously, the surface of the limiting strip 30 has anti-slip textures. This detail significantly enhances the friction between the limiting strip 30 and the detection pen 15, further improving the fixation effect on the detection pen 15.

[0049] The working principle and usage of this equipment are simple and efficient, fully demonstrating its rational design and convenience. During use, the operator only needs to open the box 10, remove the connecting wire 14 and the testing pen 15, and then use the testing pen 15 to test the insulation performance of the electricity metering box. During the test, the testing pen 15 transmits the acquired signal to the testing host 13 through the connecting wire 14. The testing host 13 quickly analyzes and displays the relevant parameters, which the operator uses to determine the insulation performance of the electricity metering box.

[0050] When the testing is complete and the testing pen 15 needs to be stored, the adjustment and limiting components of the device play a crucial role. First, the two adjustment and limiting components on the first connecting plate 18 are adjusted according to the length of the testing pen 15. Specifically, the second connecting plate 20 is moved, and the strip compartments 21 on both sides of the second connecting plate 20 will drive the connecting block 22 to move in the damping groove 19 on the first connecting plate 18. Due to the damping effect between the connecting block 22 and the damping groove 19, the connecting block 22 can stop at any position in the damping groove 19, thereby adjusting the distance between the two second connecting plates 20 to accommodate testing pens 15 of different lengths.

[0051] After adjusting the position, place the detection pen 15 in the middle of the two lower limiting strips 30, and then close the first plate 11 and the second plate 12 on the top and bottom of the box body 10. During the closing process, the limiting strips 30 above and below the detection pen 15 will gradually come into contact with the detection pen 15, thereby driving the strip adjuster 26 to move. At the same time, the two ends of the limiting strips 30 will be stretched, making the distance between the middle positions of the limiting strips 30 longer, thus tightly wrapping the detection pen 15.

[0052] When the two ends of the limiting strip 30 are stretched, it will drive the strip drum 31 to rotate, and the strip drum 31 will in turn drive the take-up roller 32 to rotate. Since the take-up roller 32 is movably connected to the fixed rod 33, and the two ends of the second spring 34 are respectively fixed to the fixed rod 33 and the take-up roller 32, the rotation of the take-up roller 32 will apply a torsional force to the second spring 34, causing the second spring 34 to deform. At this time, the second spring 34 stores elastic potential energy, and at the same time keeps the two ends of the limiting strip 30 in a taut state, providing a continuous force for subsequent fixing.

[0053] Simultaneously, after the limiting strip 30 contacts the detection pen 15, the contact portion of the limiting strip 30 will drive the corresponding strip adjuster 26 to move. The strip adjuster 26 will compress the first spring 28, which is fitted onto the outside of the limiting rod 25 between itself and the second connecting plate 20. The first spring 28 generates a rebound force after being compressed. This rebound force will cause the limiting strip 30 in the groove of the strip adjuster 26 to make tight contact with the detection pen 15. Combined with the anti-slip texture on the surface of the limiting strip 30, it can effectively limit the detection pen 15, so that both ends of the detection pen 15 are stably fixed.

[0054] The design of this device fully considers the characteristics of different detection pens 15, exhibiting strong adaptability. Because the second spring 34 can dynamically adjust the length of the limiting strip 30, and the first spring 28 can dynamically adjust the contact area between the limiting strip 30 and the detection pen 15, this device can properly store and stably fix detection pens 15 of different diameters or uneven thicknesses. This not only facilitates the storage of the detection pens 15 but also effectively prevents damage caused by displacement and impact after storage, thus significantly extending the device's service life.

[0055] In addition, the ease of operation of the equipment is also a major highlight. When using the adjustment and limiting components, the operator only needs to close the box 10 to automatically fix and protect the detection pen 15, without the need for complicated manual adjustments, which greatly saves operation time and improves the convenience and detection efficiency of the equipment.

[0056] Meanwhile, the modular design of the equipment also greatly facilitates its maintenance and repair. Since the first plate 11 and the second plate 12 of the housing 10 are arranged symmetrically, and the first connecting plate 18 is movably installed on the second plate 12 and connected by the limit bolt 16 and the fixing nut 17, when the equipment needs maintenance or repair, simply unscrew the fixing nut 17 to remove the first connecting plate 18 together with the adjustment component and the limit component for individual maintenance or replacement of parts, without having to disassemble the entire equipment, which greatly reduces maintenance costs and difficulty.

[0057] In summary, this energy metering box insulation performance testing equipment, through its ingenious structural design and precise coordination between components, achieves efficient testing of the insulation performance of the energy metering box and flexible storage and stable fixation of the testing pen 15. It has many advantages such as strong adaptability, convenient operation, and easy maintenance, and has broad application prospects and practical value in the field of energy metering.

[0058] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. An insulation performance testing device for an electricity metering box, characterized in that: This device includes a detection component, an adjustment component, and a limiting component. The detection component includes a housing (10), a detection host (13), and a detection pen (15). The housing (10) includes a first plate (11) and a second plate (12) arranged symmetrically at the top and bottom. The detection host (13) is fixedly installed on the lower first plate (11). A connecting wire (14) is fixedly connected between the detection pen (15) and the housing (10), and the connecting wire (14) is connected to the detection host (13). A first connecting plate (18) is movably installed on the second plate (12). The first connecting plate (18) has symmetrically arranged damping grooves (19) on both sides. The adjustment component is movably installed on the first connecting plate (18). The adjustment component includes a second connecting plate (20). (20) has strip grooves (24) on both sides. The two ends of the second connecting plate (20) are fixedly installed with strip bins (21). The strip bins (21) are square shells. The limiting component includes a limiting strip (30), a strip cylinder (31), a fixing rod (33), and a second spring (34). The two ends of the fixing rod (33) are fixedly installed between the second connecting plate (20) and the strip bins (21). The two ends of the limiting strip (30) are respectively connected to the strip cylinders (31) at both ends of the second connecting plate (20). A take-up roller (32) is fixedly installed in the middle of the strip cylinder (31). The take-up roller (32) is cylindrical. The two ends of the take-up roller (32) are movably connected to the fixing rod (33). The two ends of the second spring (34) are respectively fixedly installed on the fixing rod (33) and the take-up roller (32).

2. The insulation performance testing device for an electricity metering box according to claim 1, characterized in that: The second plate (12) has a groove, and a limit bolt (16) is fixedly installed on both sides of the groove. The first connecting plate (18) has holes on both sides corresponding to the limit bolt (16), and a fixed nut (17) is threadedly connected above the limit bolt (16).

3. The insulation performance testing device for an electricity metering box according to claim 1, characterized in that: A connecting block (22) is fixedly installed on the strip groove (24). The connecting block (22) is T-shaped and is movably installed in the damping groove (19).

4. The insulation performance testing device for an electricity metering box according to claim 1, characterized in that: A cover plate (23) is fixedly installed on the outside of the second connecting plate (20) and the strip bin (21). A guide roller (35) is movably installed on the upper part of the cover plate (23), and two guide rollers (35) are movably installed on the lower part of the cover plate (23), and the limiting strip (30) is movably installed between the two guide rollers (35).

5. The insulation performance testing device for an electricity metering box according to claim 1, characterized in that: A row of round holes is provided on the second connecting plate (20), and a row of strip adjusters (26) is provided below the second connecting plate (20). A limit rod (25) is movably installed in the round hole, and a limit block (27) is fixedly installed on the top of the limit rod (25). The limit block (27) is located on one side of the second connecting plate (20).

6. The insulation performance testing device for an electricity metering box according to claim 5, characterized in that: Among the strip adjusters (26) in the row, the strip adjuster (26) located at the outermost position is fixedly installed with a connecting rod (29) between it and the strip groove (24). The remaining strip adjusters (26) are fixedly connected to the bottom of the limiting rod (25) respectively. A first spring (28) is provided between the strip adjuster (26) and the second connecting plate (20) and sleeved on the outside of the limiting rod (25).

7. The insulation performance testing device for an electricity metering box according to claim 5, characterized in that: The upper half of the strip adjuster (26) is square, and the lower half of the strip adjuster (26) is semi-elliptical. The bottom of the strip adjuster (26) has a groove with rounded corners on both sides.

8. The insulation performance testing device for an electricity metering box according to claim 7, characterized in that: The limiting strip (30) is movably connected to the groove at the bottom of the strip adjuster (26). The protruding parts on both sides of the groove at the bottom of the strip adjuster (26) are rounded and limit the two sides of the limiting strip (30). The surface of the limiting strip (30) is provided with anti-slip texture.

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