An electric power meter detection device

Abstract

This invention relates to the field of instrument testing technology and discloses a power instrument testing device. Through the linkage design of the gripper assembly and the elastic assembly in the clamping mechanism, rotating around the assembly shaft, the pressure rod and the clamping rod always maintain an "L"-shaped linkage state. When the operator places the power instrument, they only need to complete the placement action; the pressure rod is then compressed, triggering the clamping rod to automatically clamp, and simultaneously completing the active calibration and alignment of the power instrument. This ensures that no additional alignment, tightening, or pressing operations are required during the clamping process. It solves the problem that existing power instrument testing devices cannot simplify the operations required for the operator to place a single instrument and shorten clamping and changeover adjustment times, thus limiting testing efficiency.

Description

Technical Field

[0001] This invention relates to the field of instrument testing technology, specifically to a power instrument testing device. Background Technology

[0002] Electricity meters, voltmeters, ammeters, and other power instruments are core equipment for power grid operation and electricity metering. Their measurement accuracy directly affects the fairness of electricity trade settlement and the reliability of power grid monitoring. According to national metrological verification regulations, these instruments must undergo power-on testing and withstand voltage testing before leaving the factory. Power-on testing verifies the instrument's metering deviation, display function, and communication performance under rated operating voltage; withstand voltage testing assesses the instrument's insulation performance, ensuring it does not break down or flashover under abnormal overvoltage conditions. Obtaining measurement deviation data from power instruments through testing devices can effectively identify hidden faults in their internal sampling circuits, metering chips, or signal conditioning components, thereby intercepting substandard products at the factory stage and preventing instruments with potential quality problems from entering the market.

[0003] Existing power meter testing devices typically consist of three main functional modules: an assembly structure, used to position and clamp the power meter at the testing station; a testing mechanism, which integrates a standard source, an error calculator, and a withstand voltage generator, used to apply electrical signals to the meter and collect response data; and a docking mechanism, responsible for driving the assembly structure and the testing mechanism to complete the insertion and separation of electrical connectors, thereby realizing the on / off control of the testing circuit.

[0004] In batch testing scenarios for power instruments, the speed at which the assembly structure can secure a single instrument has become a key bottleneck restricting the overall production line capacity. Specifically, existing assembly structures often employ threaded locking or single-sided clamping methods. Operators must perform placement, alignment, tightening, or pressing actions when inserting a single instrument, resulting in lengthy clamping times for each piece. Furthermore, to accommodate instruments of different sizes, the stroke adjustment range of the clamping components is limited, requiring manual replacement of positioning blocks or resetting of clamping force during model changes, leading to excessively long batch changeover preparation times. Therefore, significantly reducing the clamping time for a single instrument and the adjustment time for model changes has become a pressing technical problem to be solved in the field of automated power instrument testing. Summary of the Invention

[0005] The purpose of this invention is to provide a power meter testing device that solves the problem that existing power meter testing devices are difficult to simplify the operation required for operators to place a single meter and shorten the clamping time and changeover adjustment time, thus limiting testing efficiency.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a power meter testing device, comprising: An assembly base plate is provided, the surface of which is provided with a guide groove, and a testing mechanism for testing power meters is assembled at one end of the assembly base plate. A clamping mechanism is movably mounted on the upper side of the assembly base plate. The clamping mechanism is used to clamp the power meter and move it along the length of the guide groove. The clamping mechanism includes a movable seat, and clamping jaw assemblies are symmetrically arranged on both sides of the movable seat. A spring force assembly for pushing the clamping jaw assembly is provided on the lower side of the clamping jaw assembly. The clamping jaw assembly includes a clamping rod and a pressure rod. When the power meter is placed on the upper side of the movable seat, the power meter squeezes the pressure rod, which will switch the pushing direction of the spring force assembly, so that the clamping rod actively clamps the side of the power meter. The upper side of the assembly base plate is also provided with a pushing mechanism for the clamping mechanism, and the pushed clamping mechanism moves along the direction of the guide groove.

[0007] As a further description of the above technical solution: the movable seat also includes a guide slider fixedly connected to one side, and the guide slider is slidably connected to the guide groove.

[0008] As a further description of the above technical solution: an assembly frame for assembling the gripper assembly and the elastic assembly is integrally formed on one side of the movable seat, and an assembly ring is provided on the bent part of the assembly frame.

[0009] As a further description of the above technical solution: the clamping rod and the pressure rod are arranged in an "L" shape, and the clamping rod and the pressure rod are fixedly connected by an integrally set assembly shaft, which is rotatably assembled on the inner side of the assembly ring.

[0010] As a further description of the above technical solution: the elastic component includes a second retractable sleeve fixedly disposed on the lower surface of the assembly shaft, and a second retractable sleeve hinged to the lower side of the assembly frame. The lower end of the second retractable sleeve is hinged to the lower side of the assembly frame, and the upper end of the second retractable sleeve is hinged to the extension frame. A second push spring is sleeved on the outer surface of the second retractable sleeve. The second push spring pushes the extension frame to cause the gripper assembly to clamp the power instrument.

[0011] As a further description of the above technical solution: a limiting groove is provided on the side of the assembly ring, and a limiting block that moves inside the limiting groove is provided at one end of the assembly shaft.

[0012] As a further description of the above technical solution: a friction pad is fixedly connected to the gripper assembly on the side near the power meter.

[0013] As a further description of the above technical solution: a pad is provided on the side of the pressure rod away from the power meter, and the surface of the pad is arc-shaped; The assembly base plate has reset arc blocks fixedly supported on both sides by crossbeams. The surface of the reset arc block is arc-shaped, and the reset arc block rubs against the pad block during the movement of the movable seat.

[0014] As a further description of the above technical solution: the pushing mechanism includes a swing arm rotatably mounted on the surface of the guide groove, a telescopic sleeve is hinged to the middle of the swing arm, one end of the telescopic sleeve is hinged to the guide slider, and a push spring is sleeved on the surface of the telescopic sleeve.

[0015] As a further description of the above technical solution: a spring is provided on one side of the swing arm; When the swing arm pulls the movable seat away from the detection mechanism to the outermost end, the reset arc block and the pad block make frictional contact, and then the spring plate elastically pushes the swing arm to misalign the reset arc block and the pad block.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. Through the linkage design of the gripper assembly and the elastic component in the clamping mechanism, the clamping rod rotates around the assembly shaft, and the pressure rod and the clamping rod always maintain an "L"-shaped linkage state. When the operator puts in the power instrument, he only needs to complete the placement action. The pressure rod is squeezed to trigger the clamping rod to automatically clamp and simultaneously complete the active calibration and centering of the power instrument. This ensures that no additional alignment, tightening or pressing operations are required during the clamping process. In addition, the elastic component, through the cooperation of the push spring and the shrink sleeve, effectively constrains the direction of the elastic force and provides a stable clamping force, avoiding positional displacement or elastic force attenuation of the gripper assembly due to frequent rotation, thereby improving the clamping efficiency and reliability of the entire device.

[0017] 2. The swing arm in the pushing mechanism is hinged to the push spring and guide slider through the telescopic sleeve. After the power instrument is connected to the detection mechanism, the swing arm is pushed. The push spring can buffer the pressure to avoid damaging the power instrument, thereby extending the service life of the power instrument and ensuring the safety of the detection. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the assembly base plate and upper structure of the present invention; Figure 3 This is a schematic diagram of the assembly base plate and pushing mechanism of the present invention; Figure 4 This is a schematic diagram of the clamping mechanism of the present invention; Figure 5 This is a schematic diagram of the clamping state of the assembly frame and gripper assembly of the present invention; Figure 6 This is a schematic diagram of the assembly frame and gripper assembly of the present invention in the open state; Figure 7 This is a schematic diagram of the gripper assembly structure of the present invention.

[0019] In the diagram: 10. Assembly base plate; 11. Guide groove; 12. Reset arc block; 20. Pushing mechanism; 21. Swing rod; 22. Telescopic sleeve one; 23. Push spring one; 24. Spring piece; 30. Clamping mechanism; 31. Movable seat; 311. Guide slider; 32. Assembly frame; 321. Assembly ring; 322. Limiting groove; 33. Gripper assembly; 331. Clamping rod; 332. Pressure rod; 333. Assembly shaft; 334. Limiting block; 34. Elastic assembly; 341. Extension frame; 342. Telescopic sleeve two; 343. Push spring two; 35. Pad; 36. Friction pad; 40. Detection mechanism. Detailed Implementation

[0020] 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.

[0021] To further understand the content of this invention, a detailed description of the invention will be provided in conjunction with the accompanying drawings.

[0022] In batch testing scenarios for power meters, to simplify the operations (placing, aligning, tightening or pressing) required for operators to place a single meter, shorten the clamping time and changeover adjustment time of a single meter, and improve the testing efficiency of current automated power meter testing, this invention provides the following technical solution: Combination Figures 1-7 A power meter testing device, comprising: The assembly base plate 10 is horizontally mounted on the machine platform. The surface of the assembly base plate 10 is provided with a guide groove 11. One end of the assembly base plate 10 is equipped with a detection mechanism 40 for detecting power meters. The detection mechanism 40 is matched with the corresponding power meter. When the power meter moves on the upper side of the assembly base plate 10, it can dock with the detection mechanism 40 so that the detection mechanism 40 can apply a power signal to the power meter and collect response data. Furthermore, a clamping mechanism 30 is movably mounted on the upper side of the mounting base plate 10. The clamping mechanism 30 is used to clamp the power meter and move it along the length direction of the guide groove 11. The clamping mechanism 30 includes a movable seat 31, and clamping jaw assemblies 33 are symmetrically arranged on both sides of the movable seat 31. A spring force assembly 34 is provided on the lower side of the clamping jaw assembly 33 to push the clamping jaw assembly 33. The clamping jaw assembly 33 includes: a clamping rod 331 for clamping the power meter, and a pressure rod 332 triggered by the clamping rod 331 to actively clamp the power meter when the power meter is placed on the upper side of the movable seat 31. When the operator places the power meter on the upper side of the movable seat 31, the power meter squeezes the pressure rod 332, causing the clamping jaw assembly 33 to rotate. Furthermore, the rotating clamping jaw assembly 33 will also switch the pushing direction of the spring force assembly 34, so that the clamping rod 331 can clamp the side of the power meter, quickly completing the clamping and fixing of the power meter. In this operation, the operator only needs to insert the power meter. The clamping rods 331 on both sides will actively calibrate the position of the power meter while clamping it. This eliminates the need for alignment of the power meter and tightening or pressing, greatly reducing the fixing time of the power meter and further improving the detection efficiency of automated power meter testing.

[0023] Combination Figures 1-4 The movable seat 31 also includes a guide slider 311 fixedly connected to one side. The guide slider 311 is slidably connected to the guide groove 11 and can slide horizontally on the assembly base plate 10 in a preset direction.

[0024] Combination Figures 4-7 The movable seat 31 has an integrally formed assembly frame 32 for assembling the gripper assembly 33 and the elastic assembly 34 on one side, and the bent part of the assembly frame 32 is provided with an assembly ring 321.

[0025] The clamping rod 331 and the pressure rod 332 are arranged in an "L" shape. When the power meter is placed in the instrument, the bottom surface of the instrument corresponds to the pressure rod 332, and the side surface of the instrument corresponds to the clamping rod 331. The clamping rod 331 and the pressure rod 332 are fixedly connected by an integrally set assembly shaft 333. The assembly shaft 333 is rotatably mounted on the inner side of the assembly ring 321. When the bottom surface of the power meter exerts a pushing force on the pressure rod 332, it can drive the assembly shaft 333 to rotate around the shaft.

[0026] Combined Figures 5-6The elastic component 34 includes an extension frame 341 fixedly mounted on the lower surface of the assembly shaft 333, and a retractable sleeve 342 hinged to the lower side of the assembly frame 32. The upper end of the retractable sleeve 342 is hinged to the extension frame 341. A push spring 343 is sleeved on the outer surface of the retractable sleeve 342. The push spring 343 pushes the extension frame 341, causing the gripper assembly 33 to clamp the power instrument. During the pushing action of the retractable sleeve 342, the retractable sleeve 342 constrains the straight direction of the push spring 343, preventing bending during the rotation of the gripper assembly 33 and affecting the direction of the elastic force.

[0027] Specifically, combined Figure 6 Under normal conditions, the push spring 343 pushes the extension frame 341 to one side of the assembly frame 32. At this time, one end of the pressure rod 332 can protrude from the surface of the assembly frame 32, and the clamping rod 331 is also in the open state. In this state, it is convenient for the operator to place the power instrument into the clamping area between the two clamping rods 331. Combined with Figure 5 When the power meter is placed in, the bottom surface of the meter will press against the surface of the pressure rod 332, causing the assembly shaft 333 to rotate around the shaft. Before the pressure rod 332 is completely pressed into the inner side of the assembly frame 32, the extension frame 341 will rotate to the other side of the assembly frame 32. At this time, the elastic force of the retractable sleeve 342 will be released to push the extension frame 341, causing the clamping rod 331 to actively rotate towards the power meter, thereby clamping the power meter. The two clamping rods 331 cooperate to clamp the power meter and will also actively calibrate the power meter to the upper middle position of the movable seat 31.

[0028] Combination Figure 5 The assembly ring 321 has a limiting groove 322 on its side, and the assembly shaft 333 has a limiting block 334 that moves inside the limiting groove 322 at one end. The limiting groove 322 can limit the rotation range of the limiting block 334, thus preventing the elastic component 34 from pushing the clamping component 33 to rotate too much and making it difficult to reset.

[0029] Furthermore, in combination Figure 7 The gripper assembly 33 is fixedly connected to a friction pad 36 on the side near the power instrument. The friction pad 36 can increase the contact friction between the gripping rod 331 and the power instrument.

[0030] Combination Figures 1-3 The upper side of the assembly base plate 10 is also provided with a pushing mechanism 20 for pushing the clamping mechanism 30. The pushed clamping mechanism 30 moves along the direction of the guide groove 11, further driving the power instrument clamped by the clamping mechanism 30 to dock with the testing mechanism 40.

[0031] Specifically, combined Figure 3The pushing mechanism 20 includes a swing arm 21 rotatably mounted on the surface of the guide groove 11. A telescopic sleeve 22 is hinged to the middle of the swing arm 21. One end of the telescopic sleeve 22 is hinged to the guide slider 311. A push spring 23 is sleeved on the surface of the telescopic sleeve 22. By swinging the swing arm 21, the guide slider 311 can be moved on the mounting base plate 10 through the telescopic sleeve 22, further driving the power instrument to move. In addition, through the setting of the push spring 23 and the telescopic sleeve 22, when the power instrument is docked with the detection mechanism 40, the push spring 23 can buffer the pressure when the swing arm 21 is pushed further, preventing damage to the power instrument.

[0032] Combination Figure 3 and Figure 5 The mounting base plate 10 has reset arc blocks 12 fixedly supported on both sides by crossbeams. The surface of the reset arc block 12 is arc-shaped. A pad 35 is provided on the side of the pressure rod 332 away from the power instrument. The surface of the pad 35 is also arc-shaped. During the movement of the movable seat 31, the reset arc block 12 and the pad 35 will come into frictional contact, combining... Figure 5 The reset arc block 12 will block the movement path of the pad block 35, forcing the pressure rod 332 to rotate until the extension frame 341 is reset to one side of the assembly frame 32. At this time, the gripper assembly 33 returns to its initial state, and the clamping rod 331 can also automatically release the clamp on the power meter.

[0033] Furthermore, a spring piece 24 is provided on one side of the swing arm 21, and the spring piece 24 is fixedly mounted on the surface of the mounting base plate 10.

[0034] By presetting the position of the reset arc block 12 on the assembly base plate 10, the swing rod 21 pulls the movable seat 31 away from the detection mechanism 40 to the outermost end, and the reset arc block 12 will then make frictional contact with the pad block 35. At this time, the clamping rod 331 will automatically release the clamp on the power instrument. Subsequently, the spring piece 24 elastically pushes the swing rod 21 to make the reset arc block 12 and the pad block 35 misaligned, which facilitates the placement of the next power instrument. In the process of controlling the next power instrument to dock with the detection mechanism 40, the pad block 35 will not contact the reset arc block 12, and furthermore, it will not affect the clamping effect of the gripper assembly 33 on the power instrument.

[0035] 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 power meter testing device, characterized in that, include: An assembly base plate (10) is provided with a guide groove (11) on its surface, and a testing mechanism (40) for testing power meters is assembled at one end of the assembly base plate (10). The mounting base plate (10) is movably mounted with a clamping mechanism (30) on its upper side. The clamping mechanism (30) is used to clamp the power instrument and move it along the length direction of the guide groove (11). The clamping mechanism (30) includes a movable seat (31). The movable seat (31) is symmetrically provided with claw assemblies (33) on both sides. The claw assembly (33) is provided with an elastic component (34) for pushing the claw assembly (33) on its lower side. The claw assembly (33) includes a clamping rod (331) and a pressure rod (332). When the power instrument is placed on the upper side of the movable seat (31), the power instrument squeezes the pressure rod (332), which will switch the pushing direction of the elastic component (34) so ​​that the clamping rod (331) actively clamps the side of the power instrument. The upper side of the assembly base plate (10) is also provided with a pushing mechanism (20) for pushing the clamping mechanism (30), and the pushed clamping mechanism (30) moves along the direction of the guide groove (11).

2. The power meter testing device according to claim 1, characterized in that: The movable seat (31) also includes a guide slider (311) fixedly connected to one side, and the guide slider (311) is slidably connected to the guide groove (11).

3. The power meter testing device according to claim 1, characterized in that: The movable seat (31) has an integrally formed assembly frame (32) for assembling the gripper assembly (33) and the elastic assembly (34) on one side, and the bent part of the assembly frame (32) is provided with an assembly ring (321).

4. The power meter testing device according to claim 3, characterized in that: The clamping rod (331) and the pressure rod (332) are arranged in an "L" shape. The clamping rod (331) and the pressure rod (332) are fixedly connected by an integrally set assembly shaft (333). The assembly shaft (333) is rotatably assembled inside the assembly ring (321).

5. The power meter testing device according to claim 4, characterized in that: The elastic component (34) includes a retractable sleeve (342) fixedly disposed on the lower surface of the assembly shaft (333) and a retractable sleeve (342) hinged to the lower side of the assembly frame (32). The lower end of the retractable sleeve (342) is hinged to the lower side of the assembly frame (32), and the upper end of the retractable sleeve (342) is hinged to the extension frame (341). A push spring (343) is sleeved on the outer surface of the retractable sleeve (342). The push spring (343) pushes the extension frame (341) to make the gripper assembly (33) clamp the power instrument.

6. The power meter testing device according to claim 4, characterized in that: The assembly ring (321) has a limiting groove (322) on its side, and the assembly shaft (333) has a limiting block (334) that moves inside the limiting groove (322) at one end.

7. The power meter testing device according to claim 1, characterized in that: The gripper assembly (33) has a friction pad (36) fixedly connected to the side near the power meter.

8. The power meter testing device according to claim 1, characterized in that: A pad (35) is provided on the side of the pressure rod (332) away from the power meter, and the surface of the pad (35) is arc-shaped; The assembly base plate (10) has a reset arc block (12) fixedly supported on both sides by a crossbeam. The surface of the reset arc block (12) is arc-shaped. When the movable seat (31) moves, the reset arc block (12) rubs against the pad block (35).

9. The power meter testing device according to claim 1, characterized in that: The pushing mechanism (20) includes a rocker arm (21) rotatably mounted on the surface of the guide groove (11). A telescopic sleeve (22) is hinged in the middle of the rocker arm (21). One end of the telescopic sleeve (22) is hinged to the guide slider (311). A push spring (23) is sleeved on the surface of the telescopic sleeve (22).

10. A power meter testing device according to claim 9, characterized in that: A spring plate (24) is provided on one side of the swing arm (21); When the swing arm (21) pulls the movable seat (31) away from the detection mechanism (40) to the outermost end, the reset arc block (12) and the pad block (35) make frictional contact, and then the spring piece (24) elastically pushes the swing arm (21) to make the reset arc block (12) and the pad block (35) misaligned.

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