An electric energy meter test probe and detection bench

Abstract

The present application relates to the technical field of electric energy meter detection, and discloses an electric energy meter test probe and a detection workbench, through the elastic expansion of the vertical plates on the two sides of the U-shaped frame and the deformation part carrying multiple guide wires through the gap between the bolt and the inner wall of the end cap, the guide wire is adaptively fitted with the arc-shaped inner wall of the end cap. This ensures that the conductive contact area established between the end cap and the power supply cylinder is significantly improved without moving the bolt. In addition, the guide wire effectively increases the contact area through multi-point arc fitting, avoiding the local temperature rise and detection false positives caused by linear contact or point contact between the traditional needle column and the end cap, thereby improving the accuracy and reliability of the test. In this way, the safety hazards and efficiency problems of abnormal contact resistance, local temperature rise and detection false positives caused by the difficulty of the needle column of the conventional electric energy meter detection workbench to form good contact with the end cap are solved.

Description

Technical Field

[0001] This invention relates to the field of electricity meter testing technology, specifically to an electricity meter test probe and testing platform. Background Technology

[0002] An electricity meter testing bench (also known as an electricity meter calibration device or electricity meter verification bench) is a device specifically designed for testing, calibrating, and verifying the metrological performance of electricity meters. It is widely used in the quality inspection process before electricity meters leave the factory.

[0003] like Figure 1 , Figure 2 As shown, the end cap of an electricity meter, used for connecting the wire, typically has a threaded hole on its side and is equipped with a fastening bolt. After the bolt is screwed in, it presses the wire against the inner wall of the end cap, achieving both mechanical fixation of the wire and ensuring good electrical contact between the wire and the inner wall of the end cap. This bolt is usually pre-screwed into the inside of the end cap before the electricity meter leaves the factory.

[0004] During the testing of electricity meters, a needle post is installed on the testing platform to insert into the terminal cap and supply power to the electricity meter. Considering the presence of bolts inside the terminal cap, the upper side of the needle post is typically designed with an arc-shaped notch to allow the needle post to simultaneously form conductive contact with both the inner wall of the terminal cap and the bolts. However, the existing structure has the following technical drawbacks: First, the contact area is severely insufficient. The curvature of the pin notch is difficult to perfectly match the curvature of the bolt surface. Furthermore, the bolt surface has a threaded structure, resulting in mostly linear or even point contact between the two. Simultaneously, the outer diameter of the pin is usually slightly smaller than the inner diameter of the end cap, meaning the contact between the pin and the inner wall of the end cap is also only linear. These factors combined lead to a significantly smaller overall conductive contact area.

[0005] Second, the resistance increases abnormally. According to the law of resistance, contact resistance is inversely proportional to the effective contact area. Insufficient contact area directly leads to an abnormally high resistance value, which in turn causes unnecessary power loss and the risk of overheating.

[0006] Third, localized temperature rise and false alarms. Increased contact resistance can lead to localized temperature increases at the contact points when energized. This temperature rise may be misinterpreted by the temperature monitoring module of the testing platform as abnormal internal heating of the energy meter, resulting in false alarms and severely impacting the accuracy and efficiency of factory testing.

[0007] In summary, the needle-post structure of the existing electricity meter testing platform has significant shortcomings in terms of contact reliability, and there is an urgent need for an improved solution that can increase the effective contact area, reduce contact resistance, and eliminate the potential for localized temperature rise. Summary of the Invention

[0008] The purpose of this invention is to provide a test probe and testing platform for electricity meters, which solves the problems of poor contact between the probe and the end cap in conventional electricity meter testing platforms, resulting in abnormally high contact resistance, local temperature rise, and false alarms, which pose safety hazards and reduce efficiency.

[0009] To achieve the above objectives, the present invention provides the following technical solution: a test probe for an electricity meter includes: Powered flashlight; The U-shaped frame installed on the upper side of the power supply tube, during the process of inserting the U-shaped frame into the inner side of the end cap, the vertical plates on both sides of the U-shaped frame slide upward on both sides of the bolt, and the bolt pushes against the inner wall of the U-shaped frame, causing the vertical plates to elastically unfold outward; Both sides of the U-shaped frame are provided with deformable parts. The lower side of the deformable part is in conductive contact with the power supply cylinder. Under the guidance and pushing action of the U-shaped frame, the deformable part avoids the bolts and fits into the inner wall of the end cap.

[0010] As a further description of the above technical solution: the vertical plates on both sides of the U-shaped frame are provided with inner push plates near the bolt direction, and the distance between the two inner push plates is less than the outer diameter of the bolt.

[0011] As a further description of the above technical solution: the upper end of the U-shaped frame is provided with an outward inclined portion.

[0012] As a further description of the above technical solution: the inner side of the power supply cylinder is provided with a flared column, the top of the flared column is located inside the U-shaped frame, and when the top of the flared column contacts the bolt, the upper end of the U-shaped frame is at a preset distance from the inner top surface of the end cap.

[0013] As a further description of the above technical solution: an arc-shaped protrusion is fixedly provided on the side of the flared column, and an inner top is provided on the inner side of the U-shaped frame. When the flared column moves downward relative to the U-shaped frame, the inner top pushes the inner top to make the two sides of the U-shaped frame continue to elastically unfold outward.

[0014] As a further description of the above technical solution: a horizontal column is provided on both sides of the flared column, and the horizontal column abuts against the lower side of the end cap.

[0015] As a further description of the above technical solution: the upper end of the power supply tube is fitted with a docking sleeve, and the U-shaped frame is assembled on the upper side of the docking sleeve in a detachable structure.

[0016] As a further description of the above technical solution: the deformable part includes multiple guide wires, the upper ends of the multiple guide wires are welded with inclined connecting plates, and the lower ends are welded with bottom guide blocks. The connecting plates are welded to the upper end of the U-shaped frame, and the bottom guide blocks are assembled on the side of the docking sleeve in a detachable structure.

[0017] An electricity meter testing platform, comprising: Assembly table; A fixed platform is fixedly mounted on the surface of an assembly table. A test probe is mounted on the upper side of the fixed platform. A power supply unit is provided inside the fixed platform, and the power supply unit is electrically connected to a power supply cylinder. A clamping and pushing mechanism is mounted on the surface of the assembly table. The clamping and pushing mechanism is used to clamp the meter body and drive the meter body so that the end cap of the meter body aligns with the test probe.

[0018] As a further description of the above technical solution: the fixed platform is movably provided with a pull plate, the lower side of the pull plate is provided with a guide shaft and a push spring, the guide shaft is fixedly connected to the fixed platform, and the flared column is fixedly connected to the pull plate; A side plate is movably mounted on the upper side of the pull plate. The side plate is horizontally mounted on the inner wall of the fixed platform via a guide rail on one side. An opening is provided on one side of the side plate, and the power supply tube is located inside the opening. A fitting part is provided on one side of the opening to fit the side surface of the power supply tube. The fitting part is electrically connected to the power supply unit. The surface of the side plate is also provided with a beveled opening and a tension spring. A wedge block adapted to the beveled opening is provided on the upper side of the pull plate. The tension spring pulls the side plate to make the fitting part fit the surface of the power supply tube, and the wedge block pushes the beveled opening to separate the fitting part from the power supply tube.

[0019] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. By elastically unfolding the vertical plates on both sides of the U-shaped frame, and with the deformed section carrying multiple guide wires through the gap between the bolt and the inner wall of the end cap, the guide wires fit snugly against the arc-shaped inner wall of the end cap. This ensures a significantly increased conductive contact area between the end cap and the power supply cylinder without moving the bolt, thus resolving the problem of abnormally high resistance caused by insufficient conductive contact area. Furthermore, the multi-point arc-shaped fit of the guide wires effectively increases the contact area, avoiding localized temperature rises and false alarms caused by linear or point contact between the traditional needle and the end cap, thereby improving the accuracy and reliability of the test.

[0020] 2. The inner push plate ensures that the bolt continues to push the U-shaped frame outward elastically through the inner push plate, while ensuring that the U-shaped frame is at a suitable distance from the inner wall of the end cap. This prevents the U-shaped frame from being over-deformed or under-fitted due to the large difference between the outer diameter of the bolt and the inner diameter of the end cap, and avoids poor contact between the deformed part and the inner wall of the end cap. This ensures that the deformed part can effectively fit and fit the inner wall of the end cap, maintaining a stable contact area.

[0021] 3. The flared post limits the rising height of the U-shaped frame inside the end cap by contacting the bolt at the top, preventing the U-shaped frame from touching the top inside the end cap and causing structural damage. At the same time, the arc-shaped protrusion pushes the inner top, allowing the two sides of the U-shaped frame to continue to elastically expand outward, further increasing the angle at which the U-shaped frame opens outward, so as to further compress the deformed part and form a larger area of ​​contact with the inner wall of the end cap, thereby enhancing the stability of the conductive contact. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the existing needle insertion end cap; Figure 3 This is a schematic diagram of the test probe and fixing stage structure of the present invention; Figure 4 This is a schematic diagram of the internal structure of the test probe insertion end cap of the present invention; Figure 5 This is a schematic diagram of the upper structure of the test probe of the present invention; Figure 6 This is a schematic diagram of the disassembled test probe structure of the present invention; Figure 7 This is a schematic diagram of the power supply cylinder and flared column structure of the present invention; Figure 8 This is a schematic diagram of another U-shaped frame structure of the present invention.

[0023] In the diagram: 101, needle column; 102, notch; 11. Power supply tube; 12. Deformation section; 121. Guide wire; 122. Bottom guide block; 123. Connecting plate; 13. U-shaped frame; 131. Outer bevel; 132. Inner push plate; 133. Inner top; 14. Flared column; 141. Top end; 142. Arc-shaped protrusion; 143. Horizontal column; 15. Connecting sleeve; 20. Fixing platform; 21. Pull plate; 211. Guide shaft; 212. Push spring; 213. Wedge block; 22. Side plate; 221. Fitting part; 222. Tension spring; 223. Beveled part; 30. Clamping and pushing mechanism; 40. Assembly table; 50. Table body; 51. End cap; 52. Bolt. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] To further understand the content of this invention, a detailed description of the invention will be provided in conjunction with the accompanying drawings.

[0026] Combination Figure 1 and Figure 2The needle post 101 on the existing fixed platform 20 has an arc-shaped notch 102 at its upper end. When the needle post 101 is inserted into contact with the end cap 51 of the meter body 50, the arc curvature of the notch 102 is difficult to perfectly match the curvature of the bolt 52 surface. In addition, the bolt 52 surface has a threaded structure, so the actual contact between the two is mostly linear or even point contact. At the same time, the outer diameter of the needle post 101 is slightly smaller than the inner diameter of the end cap 51, and the contact between the needle post 101 and the inner wall of the end cap 51 is also only linear. The combination of these factors results in a significantly smaller conductive contact area between the end cap 51 and the needle post 101, which in turn causes abnormally high resistance, local temperature rise, and false alarms.

[0027] To address the above problems, the present invention provides the following technical solution: Combination Figures 3 to 8 A test probe for an electricity meter, comprising: The power supply tube 11 has a U-shaped frame 13 on its upper side. The vertical plates on both sides of the U-shaped frame 13 are elastic components, such as rigid springs or elastic plastic products. When the U-shaped frame 13 is inserted into the end cap 51, the vertical plates on both sides slide upward along the sides of the bolt 52. The bolt 52 pushes against the inner wall of the U-shaped frame 13, causing the vertical plates to elastically unfold outward, thereby fitting against the inner wall of the end cap 51.

[0028] Both sides of the U-shaped frame 13 are provided with deformable portions 12, each comprising multiple guide wires 121. The lower ends of the multiple guide wires 121 are connected to the upper end of the U-shaped frame 13 and make conductive contact with the power supply cylinder 11. When the U-shaped frame 13 is inserted into the inner side of the end cap 51, the upper ends of the deformable portions 12 carrying the multiple guide wires 121 pass through the gap between the bolt 52 and the inner wall of the end cap 51, allowing the deformable portions 12 to avoid the bolt 52 and extend above it. At the same time, the U-shaped frame 13 is pushed by the bolt 52, and the vertical plates on both sides elastically deform outward, further compressing the multiple guide wires 121 on the sides, making them fit and conform to the arc-shaped inner wall of the end cap 51. Thus, the guide wires 121 and the end cap 51 form a good conductive contact. Without moving the bolt 52, the conductive contact area between the end cap 51 and the power supply cylinder 11 is significantly increased, thereby avoiding abnormal increases in resistance due to insufficient conductive contact area, as well as the resulting problems such as local temperature rise and false alarms.

[0029] Combination Figures 4 to 6 The U-shaped frame 13 has inner push plates 132 on both sides of the vertical plates near the bolt 52. The distance between the two inner push plates 132 is smaller than the outer diameter of the bolt 52. For situations where the outer diameter of the bolt 52 differs significantly from the inner diameter of the end cap 51, the inner push plates 132 ensure that the bolt 52 continues to push the sides of the U-shaped frame 13 outwards elastically through the inner push plates 132. Simultaneously, it ensures that the U-shaped frame 13 maintains a suitable distance from the inner wall of the end cap 51, thereby allowing the deformable portions 12 on both sides to effectively fit and conform to the inner wall of the end cap 51, ensuring sufficient contact area.

[0030] Furthermore, the upper end of the U-shaped frame 13 is provided with an outer inclined portion 131, and the two sides of the U-shaped frame 13 can be stably opened to both sides of the bolt 52 under the guidance of the outer inclined portion 131.

[0031] Combination Figures 5 to 7 The inner side of the power supply tube 11 is provided with a flared post 14, the top end 141 of which is located inside the U-shaped frame 13. When the top end 141 contacts the bolt 52, the upper end of the U-shaped frame 13 maintains a preset distance from the inner top surface of the end cap 51. The setting of the flared post 14 limits the rising height of the U-shaped frame 13 inside the end cap 51, preventing the U-shaped frame 13 from touching the top inside the end cap 51.

[0032] Furthermore, an arc-shaped protrusion 142 is fixedly provided on the side of the flared column 14, and an inner top 133 is provided on the inner side of the U-shaped frame 13. When the flared column 14 moves downward relative to the U-shaped frame 13, the arc-shaped protrusion 142 pushes the inner top 133, causing the two sides of the U-shaped frame 13 to continue to elastically unfold outward. This can further increase the angle at which the U-shaped frame 13 opens outward, so as to further compress the deformed part 12 and form a larger area of ​​contact with the inner wall of the end cap 51.

[0033] Furthermore, when the bolt 52 inside the end cap 51 is not tightened, there are horizontal posts 143 on both sides of the flared post 14, which abut against the lower side of the end cap 51. When the end cap 51 descends relative to the U-shaped frame 13, the lower edge of the end cap 51 pushes the flared post 14 downward through the horizontal posts 143, so that the flared post 14 pushes the U-shaped frame 13 to unfold through the arc-shaped protrusion 142, ensuring that the deformable part 12 can still fit and conform to the inner wall of the end cap 51.

[0034] Combination Figure 6 The upper end of the power supply tube 11 is fitted with a docking sleeve 15, and the U-shaped frame 13 is detachably assembled on the upper side of the docking sleeve 15. Multiple guide wires 121 have inclined connecting plates 123 welded to their upper ends and bottom guide blocks 122 welded to their lower ends. The connecting plates 123 are welded to the upper end of the U-shaped frame 13, and the bottom guide blocks 122 are detachably assembled on the side of the docking sleeve 15. The U-shaped frame 13 and the deformable part 12 can be flexibly replaced on the upper side of the power supply tube 11, facilitating future maintenance.

[0035] Combination Figure 6 and Figure 8 The inner top 133 of the U-shaped frame 13 can be a protruding block or a protruding structure integrally formed on the U-shaped frame 13.

[0036] Combination Figure 1 and Figure 3 A power meter testing platform, comprising: An assembly table 40 has a fixed mounting platform 20 on its surface. A test probe is mounted on the upper side of the fixed platform 20. A power supply unit is located inside the fixed platform 20 and is electrically connected to the power supply cylinder 11. A clamping and pushing mechanism 30 is movably mounted on the surface of the assembly table 40. The clamping and pushing mechanism 30 is used to clamp the meter body 50 and drive the meter body 50 so that the end cap 51 of the meter body 50 aligns with the test probe.

[0037] Furthermore, a pull plate 21 is movably provided inside the fixed platform 20. A guide shaft 211 and a push spring 212 are provided on the lower side of the pull plate 21. The guide shaft 211 is fixedly connected to the fixed platform 20. The pull plate 21 is movably connected to the guide shaft 211 through a linear bearing. The push spring 212 elastically pushes the pull plate 21 upward. The flared column 14 is fixedly connected to the pull plate 21. When one flared column 14 moves downward inside the fixed platform 20, it will drive multiple other flared columns 14 on one side to move downward simultaneously through the pull plate 21.

[0038] A side plate 22 is movably mounted on the upper side of the pull plate 21. The side plate 22 is horizontally mounted on the inner wall of the fixed platform 20 via a guide rail on one side. An opening is provided on one side of the side plate 22, and the power supply tube 11 is located inside the opening. A fitting part 221 is provided on one side of the opening to fit the side surface of the power supply tube 11. The fitting part 221 is electrically connected to the power supply unit. The surface of the side plate 22 is also provided with a beveled part 223 and a tension spring 222. A wedge block 213 adapted to the beveled part 223 is provided on the upper side of the pull plate 21. The tension spring 222 pulls the side plate 22 to make the fitting part 221 fit the surface of the power supply tube 11, so that the power supply unit makes conductive contact with the corresponding power supply tube 11 through the fitting part 221. The wedge block 213 pushes the beveled part 223 to separate the fitting part 221 from the power supply tube 11. Under normal conditions, the wedge block 213 pushes the inclined opening 223, causing the contact part 221 to separate from the flared post 14. When the flared post 14 pushes the pull plate 21 down to the bottom, the side plate 22 pulled by the tension spring 222 can then make contact with the power supply tube 11. Thus, when the flared post 14 descends to the bottom, the U-shaped frame 13 pushes the deformable part 12 and the end cap 51 to establish a good contact area. Power is then supplied to the power supply tube 11 through the contact part 221, ensuring that the deformable part 12 is not energized during contact with the end cap 51, avoiding resistance changes caused by changes in contact area during the gradual contact process. Similarly, when the flared post 14 initially moves upward, the contact part 221 and the power supply tube 11 will first disconnect, and then the U-shaped frame 13 carries the deformable part 12 out of the inside of the end cap 51, also without energization.

[0039] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A test probe for an electricity meter, characterized in that, include: Power supply tube (11); The U-shaped frame (13) is set on the upper side of the power supply tube (11). During the process of inserting the U-shaped frame (13) into the inner side of the end cap (51), the vertical plates on both sides of the U-shaped frame (13) slide upward on both sides of the bolt (52), and the bolt (52) pushes the inner wall of the U-shaped frame (13), so that the vertical plates unfold outward elastically. The U-shaped frame (13) has a deformable part (12) on both sides. The lower side of the deformable part (12) is in conductive contact with the power supply cylinder (11). Under the guidance and pushing action of the U-shaped frame (13), the deformable part (12) avoids the bolt (52) and fits into the inner wall of the end cap (51).

2. The energy meter test probe according to claim 1, characterized in that: The U-shaped frame (13) has inner push plates (132) on both sides of the vertical plates near the bolt (52), and the distance between the two inner push plates (132) is less than the outer diameter of the bolt (52).

3. The energy meter test probe according to claim 1, characterized in that: The upper end of the U-shaped frame (13) is provided with an outer inclined part (131).

4. The energy meter test probe according to claim 1, characterized in that: The inner side of the power supply tube (11) is provided with a flared column (14). The top end (141) of the flared column (14) is located inside the U-shaped frame (13). When the top end (141) and the bolt (52) are in contact, the upper end of the U-shaped frame (13) is at a preset distance from the inner top surface of the end cap (51).

5. A test probe for an electricity meter according to claim 4, characterized in that: The flared column (14) is fixed with an arc-shaped protrusion (142) on its side. The U-shaped frame (13) is provided with an inner top (133) on its inner side. When the flared column (14) moves downward relative to the U-shaped frame (13), the inner top (133) pushes the inner top (133) to make the two sides of the U-shaped frame (13) continue to expand outward elastically.

6. A test probe for an electricity meter according to claim 5, characterized in that: The flared post (14) is also provided with horizontal posts (143) on both sides, and the horizontal posts (143) abut against the lower side of the end cap (51).

7. The energy meter test probe according to claim 1, characterized in that: The upper end of the power supply tube (11) is fitted with a docking sleeve (15), and the U-shaped frame (13) is assembled on the upper side of the docking sleeve (15) in a detachable structure.

8. The energy meter test probe according to claim 1, characterized in that: The deformable part (12) includes multiple guide wires (121), with inclined connecting plates (123) welded to the upper ends of the multiple guide wires (121) and bottom guide blocks (122) welded to the lower ends. The connecting plates (123) are welded to the upper end of the U-shaped frame (13), and the bottom guide blocks (122) are assembled on the side of the docking sleeve (15) in a detachable structure.

9. A testing platform for electricity meters, characterized in that, include: Assembly table (40); A fixed platform (20) is fixedly mounted on the surface of the assembly table (40). The upper side of the fixed platform (20) is equipped with a test probe as described in claim 6. The fixed platform (20) is provided with a power supply unit inside, and the power supply unit is electrically connected to the power supply cylinder (11). A clamping and pushing mechanism (30) is mounted on the surface of the assembly table (40). The clamping and pushing mechanism (30) is used to clamp the watch body (50) and drive the watch body (50) so that the end cap (51) of the watch body (50) is connected to the test probe.

10. The energy meter testing platform according to claim 9, characterized in that: The fixed platform (20) is equipped with a pull plate (21) inside. The pull plate (21) is equipped with a guide shaft (211) and a push spring (212) on its lower side. The guide shaft (211) is fixedly connected to the fixed platform (20). The flared column (14) is fixedly connected to the pull plate (21). A side plate (22) is movably provided on the upper side of the pull plate (21). The side plate (22) is horizontally mounted on the inner wall of the fixed platform (20) via a guide rail on one side. An opening is provided on one side of the side plate (22), and the power supply tube (11) is located inside the opening. A fitting part (221) is provided on one side of the opening to fit the side surface of the power supply tube (11). The fitting part (221) is electrically connected to the power supply unit. The surface of the side plate (22) is also provided with a beveled opening (223) and a tension spring (222). A wedge block (213) is provided on the upper side of the pull plate (21) to fit the beveled opening (223). The tension spring (222) pulls the side plate (22) to make the fitting part (221) fit the surface of the power supply tube (11). The wedge block (213) pushes the beveled opening (223) to separate the fitting part (221) from the power supply tube (11).

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