Reliability testing device of electric power metering equipment

Abstract

The invention provides a reliability testing device and method for electric power metering equipment, and belongs to the technical field of electric power metering equipment test.The reliability testing device for the electric power metering equipment comprises a water tank, a lifting mechanism, a spraying testing assembly and a dripping testing assembly; a first test area positioned at the lower part and a second test area positioned at the upper part are arranged in the water tank; the lifting mechanism is arranged in the water tank, and the lifting mechanism is provided with a lifting seat used for installing electric power metering equipment; the spray test assembly comprises a first water pump communicated with the first test area, a water pipe communicated with the water pump and a spray head; the water dripping test assembly comprises a second water pump communicated with the first test area and a rotating disc arranged at the top of the water tank, a plurality of water dripping areas are arranged on the rotating disc, and different water dripping areas are used for simulating different water dripping conditions; the rotating disc is used for rotating and switching different dripping areas to be located below a water outlet of the second water pump.

Description

Technical Field

[0001] The present invention belongs to the technical field of power metering equipment testing, and particularly relates to a reliability testing device for power metering equipment. Background Art

[0002] As a key component in the power system, power metering equipment, where power transformers and acquisition terminals undertake the important task of accurately measuring electric energy. However, in actual use, due to frequent occurrence of flood disasters, power metering equipment will be subjected to various adverse effects such as waterlogging, immersion, and impact. Once water seeps into the interior of the power metering equipment, it will damage its electrical insulation, resulting in faults such as electric leakage and short circuit, affecting the accuracy and safety of power metering; on the other hand, the impact force of the flood may cause the power metering equipment to displace, be damaged, or even completely lose its function.

[0003] Existing power metering equipment is generally put into use directly after manufacturing, unable to accurately evaluate its performance status, and unable to determine whether it has the ability to resist water seepage under conditions such as waterlogging, increasing subsequent use costs and maintenance costs. Summary of the Invention

[0004] An embodiment of the present invention provides a reliability testing device for power metering equipment, aiming to solve the technical problem that the performance of existing power metering equipment cannot be accurately evaluated before use, and thus it is prone to water seepage, resulting in increased subsequent use costs and maintenance costs.

[0005] In a first aspect, an embodiment of the present invention provides a reliability testing device for power metering equipment, including a water tank, a lifting mechanism, a spray testing component, and a dripping testing component. The interior of the water tank has a first testing area located below and a second testing area located above; the lifting mechanism is arranged in the water tank, and the lifting mechanism has a lifting seat for installing the power metering equipment; the spray testing component includes a first water pump communicated with the first testing area, a water pipe and a nozzle communicated with the water pump. The water pipe and the nozzle are both fixed to the water tank and are located in the second testing area; the dripping testing component includes a second water pump communicated with the first testing area, a rotating disk arranged on the top of the water tank. The water outlet of the second water pump is located above the rotating disk. The rotating disk is located above the lifting seat. The rotating disk is provided with a plurality of dripping areas. Different dripping areas are used to simulate different dripping situations. The rotating disk is used to rotate and switch different dripping areas to be located below the water outlet of the second water pump.

[0006] In combination with the first aspect, in a possible implementation manner, a plurality of partitions are provided on the rotating disk, and a dripping area is formed by enclosing between every two adjacent partitions. A plurality of dripping holes are provided on the rotating disk corresponding to each dripping area, and the aperture diameters and / or densities of the dripping holes in adjacent dripping areas are different.

[0007] In combination with the first aspect, in a possible implementation manner, the lifting mechanism further includes: A first motor, fixedly connected to the bottom of the water tank; A screw rod, which is in transmission connection with the output shaft of the first motor. The screw rod is rotatably fitted in the water tank, and the screw rod is parallel to the up-and-down direction; Wherein, the lifting seat includes two fixing frames, and the two fixing frames are symmetrically arranged on both sides of the screw rod and are threadedly connected to the screw rod.

[0008] In combination with the first aspect, in a possible implementation manner, the spraying test assembly further includes a water guide plate, which is arranged in the water tank and above the lifting seat. The water guide plate gradually inclines towards the screw rod in the direction from top to bottom, and the top surface of the water guide plate is lower than the heights of the water pipe and the nozzle.

[0009] In combination with the first aspect, in a possible implementation manner, a connecting rod is provided between the water guide plate and the screw rod. The connecting rod is fixedly connected to the water guide plate and is detachably connected to the screw rod. A plurality of connecting rods are arranged at intervals in the up-and-down direction.

[0010] In combination with the first aspect, in a possible implementation manner, a splash plate is further provided in the water tank and below the lifting seat, and the splash plate is horizontally arranged.

[0011] In combination with the first aspect, in a possible implementation manner, the splash plate includes two semi-circular plate bodies, and a surrounding portion is provided on each plate body, and the surrounding portion is fixedly connected to the screw rod.

[0012] In combination with the first aspect, in a possible implementation manner, a second motor is provided at the top of the water tank, a gear is fixedly connected to the output shaft of the second motor, and teeth meshing with the gear are provided on the outer periphery of the rotating disk.

[0013] In combination with the first aspect, in a possible implementation manner, an opening and closing door is provided on the side wall of the water tank.

[0014] The solution shown in the embodiments of the present application, compared with the prior art, after the power metering device is produced, the reliability test can be carried out through this device. The specific test process is as follows: Fix the power metering device on the moving seat. There is test water in the first test area. When the moving seat is in the first test area, the power metering device can be immersed in the test water for a certain period of time for the immersion test; when the moving seat is in the second test area, the test can be carried out through the spray test component or the drip test component. Among them, the spray test component can select a water pipe or a nozzle to simulate different amounts of rain. The water pipe or nozzle extracts the test water in the first test area and sprays it on the power metering device to carry out the flushing test on it; among them, the drip test component can extract the test water in the first test area through the second water pump and drip it on the power metering device through different drip areas on the rotating disk to carry out the drip test on it. The reliability test device of the present invention can realize the immersion, flushing, and drip tests of the power metering device by setting up a water tank, a spray test component, and a drip test component. And when carrying out the immersion test, different immersion depths can be simulated. When carrying out the flushing test, different amounts of rain can be simulated. When carrying out the drip test, different drip environments can be simulated. There are many variables and the simulated scenarios are complete, making the reliability test of the power metering device more accurate; among them, when the spray test component and the drip test component are used, the test water in the first test area is adopted, and the water will flow back into the first test area during the test, which can realize the recycling of the test water and reduce the use cost.

[0015] In a second aspect, the embodiments of the present invention also provide a method for testing the reliability of a power metering device, which is implemented through the above-mentioned reliability test device for a power metering device, and includes the following steps: S10: Fix the power metering device on the lifting seat, and at this time the lifting seat is in the second test area; S20: Turn on the second water pump, rotate and switch different drip areas to correspond to the water outlet of the second water pump until the drip test is completed for multiple drip areas; S30: Turn on the first water pump, switch the water pipe and the nozzle to spray on the top of the power metering device until the flushing test is completed; S40: The lifting seat drives the power metering device to descend to the first test area, and at this time the power metering device is immersed in the test water for a preset period of time; S50: Take out the power metering device and compare it with the standard metering device to observe the change of the metering value.

[0016] The solution shown in the embodiments of the present application, compared with the prior art, when performing reliability testing on power metering equipment, first conducts a dripping test, then a flushing test, and finally an immersion test. The test sequence is sorted according to the amount of water, which can ensure effective and sufficient testing of the power metering equipment. Finally, it is compared with a standard metering equipment (including the surface, internal parts, performance, etc.), and the change in the metering value of the tested power metering equipment is observed to determine whether the power metering equipment is damaged. Through this test method, comprehensive testing of the power metering equipment can be carried out, which is beneficial to evaluating the actual situation of the power metering equipment and improving the manufacturing process of the power metering equipment according to the evaluation results, thus contributing to improving the production quality of the power metering equipment. Description of the Drawings

[0017] Figure 1 It is a front view structural schematic diagram of the reliability testing device for power metering equipment provided by the embodiment of the present invention; Figure 2 It is a top view structural schematic diagram of the rotating disk adopted by the embodiment of the present invention; Description of the Reference Numerals: 10 - water tank; 11 - bottom box; 12 - enclosure; 13 - opening and closing door; 20 - lifting mechanism; 21 - lifting seat; 211 - fixing frame; 22 - first motor; 23 - screw; 31 - first water pump; 32 - water pipe; 33 - nozzle; 34 - water guide plate; 35 - connecting rod; 41 - second water pump; 42 - rotating disk; 43 - dripping area; 44 - partition board; 45 - dripping hole; 46 - tooth; 50 - splashing plate; 51 - plate body; 52 - surrounding part; 60 - second motor; 61 - gear; 70 - power metering equipment. Detailed Embodiment

[0018] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the following further details the present invention in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0019] In the claims, description and the above drawings of the present invention, unless otherwise clearly defined, when using terms such as "first", "second" or "third", etc., they are all used to distinguish different objects and not for describing a specific order.

[0020] In the claims, the description and the above-mentioned drawings of the present invention, unless otherwise clearly defined, when using terms such as "upper", "lower", "top", "bottom", "front", "rear", "inner", "outer", "center", "lateral", "longitudinal", "horizontal", "vertical", "left", "right", "clockwise", "counterclockwise", "high", "low", etc. to indicate the orientation or position relationship, it is based on the orientation and position relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, so it should not be construed as limiting the specific protection scope of the present invention.

[0021] In the claims, the description and the above-mentioned drawings of the present invention, unless otherwise clearly defined, when using the terms "fixed connection" or "fixedly connected", it should be understood in a broad sense, that is, any connection method without displacement relationship and relative rotation relationship between the two, that is, it includes non-detachable fixed connection, detachable fixed connection, being integrated as a whole, and being fixed connected through other devices or elements.

[0022] In the claims, the description and the above-mentioned drawings of the present invention, when using terms such as "comprising", "having" and their variants, are intended to mean "including but not limited to".

[0023] Please refer to Figures 1 to 2 , and now the reliability test device for the power metering equipment provided by the present invention will be described. The reliability test device for the power metering equipment includes a water tank 10, a lifting mechanism 20, a spray test assembly, and a dripping test assembly. The interior of the water tank 10 has a first test area located below and a second test area located above; the lifting mechanism 20 is arranged in the water tank 10, and the lifting mechanism 20 has a lifting seat 21 for installing the power metering equipment 70; the spray test assembly includes a first water pump 31 communicated with the first test area, a water pipe 32 communicated with the water pump, and a spray head 33. The water pipe 32 and the spray head 33 are both fixed to the water tank 10 and are located in the second test area; the dripping test assembly includes a second water pump 41 communicated with the first test area, a rotating disk 42 arranged on the top of the water tank 10. The water outlet of the second water pump 41 is located above the rotating disk 42. The rotating disk 42 is located above the lifting seat 21. A plurality of dripping areas 43 are provided on the rotating disk 42. Different dripping areas 43 are used to simulate different dripping conditions. The rotating disk 42 is used to rotate and switch different dripping areas 43 to be located below the water outlet of the second water pump 41.

[0024] It should be noted that the water pipe 32 can spray water on the power metering device 70 to simulate the impact of water flow in a flood disaster. By adjusting the water pressure and flow direction of the water pipe 32, water flow impacts of different intensities and angles can be simulated to test the reliability of the power metering device 70 under such conditions. The position and angle of the water pipe 32 can be adjusted according to the test requirements. For example, the water pipe 32 can be set at different heights or angles to simulate water flow impacts from different directions, so as to more comprehensively test the waterproof performance and structural strength of the power metering device 70; the nozzle 33 can perform a water spraying operation on the power metering device 70 for a rain test. The rain test can simulate the situation of natural rainfall, such as the waterproof performance of the power metering device 70 under different rainfall intensities such as light rain, moderate rain, and heavy rain. The spraying range and intensity of the nozzle 33 can be controlled by adjusting the type and water pressure of the nozzle 33. The rain test can help detect whether the sealing performance and waterproof performance of the power metering device 70 can remain good under natural rainfall conditions. At the same time, the rain test can also simulate various rainfall situations that the power metering device 70 may encounter during outdoor use, providing more reliable test data for its actual application.

[0025] For the reliability test device of the power metering device provided in this embodiment, compared with the prior art, after the power metering device 70 is produced, the reliability test can be carried out through this device. The specific test process is as follows: The power metering device 70 is fixed on the moving seat. The first test area is filled with test water. When the moving seat is in the first test area, the power metering device 70 can be immersed in the test water for a certain period of time for an immersion test; when the moving seat is in the second test area, the test can be carried out through the spraying test component or the dripping test component. Among them, the spraying test component can select the water pipe 32 or the nozzle 33 to simulate different amounts of rainwater. The water pipe 32 or the nozzle 33 extracts the test water in the first test area and sprays it on the power metering device 70 to perform a flushing test on it; among them, the dripping test component can extract the test water in the first test area through the second water pump 41 and drip it on the power metering device 70 through different dripping areas 43 on the rotating disk 42 to perform a dripping test on it. The reliability test device of the present invention can realize the immersion, flushing, and dripping tests of the power metering device 70 by setting the water tank 10, the spraying test component, and the dripping test component. And during the immersion test, different immersion depths can be simulated. During the flushing test, different amounts of rain can be simulated. During the dripping test, different dripping environments can be simulated. There are many variables and the simulated scenarios are complete, making the reliability test of the power metering device more accurate; among them, when the spraying test component and the dripping test component are used, the test water in the first test area is adopted, and the water will flow back into the first test area during the test, so that the recycling of the test water can be realized and the use cost can be reduced.

[0026] In some embodiments, a specific implementation of the above-mentioned rotating disk 42 may adopt the structure as shown in Figure 2 . Refer to Figure 2 . A plurality of partition plates 44 are provided on the rotating disk 42. A water dripping area 43 is formed by enclosing between every two adjacent partition plates 44. A plurality of water dripping holes 45 are provided on the rotating disk 42 corresponding to each water dripping area 43. The aperture diameters and / or densities of the water dripping holes 45 in adjacent water dripping areas 43 are different.

[0027] As an example, three partition plates 44 are provided on the rotating disk 42. The three partition plates 44 are fixedly connected to the top surface of the rotating disk 42 (can be fixed by welding or other means). The plate surface of each partition plate 44 is perpendicular to the disk surface of the rotating disk 42. Then the three partition plates 44 divide the rotating disk 42 into three water dripping areas 43. The aperture diameter of the water dripping holes 45 in the first water dripping area 43 is different from that of the water dripping holes 45 in the second water dripping area 43. The density of the water dripping holes 45 in the second water dripping area 43 is different from that of the water dripping holes 45 in the third water dripping area 43. Larger water dripping holes 45 can generate larger water flows, simulating the stronger water flow impact in flood disasters, and testing the structural strength and waterproof performance of the power metering device 70 in this case; the water dripping holes 45 with a larger density can generate relatively dense water droplets, simulating the situation of less or local water dripping, and testing the sealing performance and reliability of the power metering device 70 under slight water damage; by conducting water dripping tests and comparisons through different water dripping areas 43 respectively, the influence of different intensity or frequency of water dripping tests on the performance of the power metering device 70 can be obtained.

[0028] It is easy to think that in two adjacent water dripping areas 43, only the aperture diameters of the water dripping holes 45 can be different (i.e., the densities of the water dripping holes 45 are the same), or only the densities of the water dripping holes 45 can be different (i.e., the aperture diameters of the water dripping holes 45 are the same), or both the aperture diameters and densities of the water dripping holes 45 can be different.

[0029] By providing a plurality of partition plates 44 on the rotating disk 42, when a water dripping test is carried out in a certain water dripping area 43, the influence of water flow entering the adjacent water dripping area 43 on the water dripping test result can be avoided, ensuring that each water dripping area 43 can independently carry out a specific type of test, avoiding interference between different tests, ensuring that the test conditions of each water dripping area 43 are relatively stable, facilitating the analysis and comparison of test results, and improving the accuracy and reliability of the test.

[0030] In some embodiments, a specific implementation of the above-mentioned lifting mechanism 20 may adopt the structure as shown in Figure 1 . Refer to Figure 1 . The lifting mechanism 20 further includes a first motor 22 and a screw rod 23. The first motor 22 is fixedly connected to the bottom of the water tank 10; the screw rod 23 is in transmission connection with the output shaft of the first motor 22. The screw rod 23 is rotatably fitted in the water tank 10, and the screw rod 23 is parallel to the up and down direction; Among them, the lifting seat 21 includes two fixing frames 211, which are symmetrically arranged on both sides of the screw rod 23 and are threadedly connected to the screw rod 23.

[0031] It is easy to think that in order to ensure the stability of the screw rod 23, the bottom end of the screw rod 23 is rotatably connected to the bottom wall of the water tank 10, and the top end of the screw rod 23 is rotatably connected to the side wall of the water tank 10.

[0032] In this embodiment, since the lifting seat 21 is threadedly connected to the screw rod 23, when it is not necessary to change the height of the lifting seat 21, the motor is turned on to drive the screw rod 23 to rotate. The screw rod 23 can drive the lifting seat 21 to rotate, so that the power metering device 70 can be tested at different angles, better simulating various situations that may occur in actual flood disasters; the rotational adjustment of the screw rod 23 brings great flexibility to the test. By rotating the screw rod 23, the angle of the power metering device 70 can be easily adjusted, enabling it to receive water flow impacts or immersions from different directions. Also, by rotating the screw rod 23, the tester can observe from multiple angles without disassembling the power metering device 70 to timely discover existing problems.

[0033] When it is necessary to change the height of the lifting seat 21, the motor is turned on to drive the screw rod 23 to rotate, and the outside clamps the lifting seat 21 to prevent it from rotating with the screw rod 23. Then, during the rotation of the screw rod 23, the height of the lifting seat 21 will change, enabling the switching of the power metering device 70 between the first test area and the second test area. And in the first test area, by adjusting the height of the power metering device 70 differently, the influence of different immersion depths can be tested. In the second test area, by adjusting the height of the power metering device 70 differently, the influence generated at different heights from the dripping area 43 or the water pipe 32 or the nozzle 33 can be tested.

[0034] Specifically, the screw rod 23 is arranged at the central position of the water tank 10, and the two fixing frames 211 are symmetrically arranged on both sides of the screw rod 23. The same power metering device 70 can be installed on the two fixing frames 211 at the same time, which can ensure the balance of the power metering device 70 during the test; or two power metering devices 70 can be installed on the two fixing frames 211 respectively. The models of these two power metering devices 70 can be different, and they can be tested simultaneously to facilitate the comparison of performance differences under flood disasters.

[0035] It is easy to think that in order to ensure the firm fixation of the power metering device 70, the design of the fixing frame 211 matches the shape and size of the power metering device 70, which can not only prevent the power metering device 70 from falling during the test, but also ensure the safety and accuracy of the test.

[0036] In some embodiments, an improved implementation manner of the above spray test assembly can adopt, for example Figure 1The structure shown. Refer to Figure 1 The spray test assembly further includes a water guide plate 34. The water guide plate 34 is disposed in the water tank 10 and above the lifting seat 21. The water guide plate 34 is inclined gradually towards the screw rod 23 in the direction from top to bottom. The top surface of the water guide plate 34 is lower than the heights of the water pipe 32 and the spray head 33.

[0037] Optionally, two water guide plates 34 can be relatively arranged, and the distance between the two water guide plates 34 gradually decreases from top to bottom; or the water guide plate 34 is a conical cover with a gradually decreasing diameter from top to bottom.

[0038] In this embodiment, when the water pipe 32 or the spray head 33 is working, the water guide plate 34 can guide the water flow to the power metering device 70, which can ensure that the water flow impacts the power metering device 70 in a specific direction and angle, and more realistically simulate the impact of the water flow on the power metering device 70 during a flood.

[0039] It should be noted that the inclination angle of the water guide plate 34 can be adjusted according to the test requirements to change the impact direction and strength of the water flow. For example, increasing the inclination angle can make the water flow impact the power metering device 70 more concentratedly, simulating a stronger water flow impact; decreasing the inclination angle can make the water flow flow towards the power metering device 70 more gently, simulating a weaker water flow impact.

[0040] In some embodiments, a specific installation method of the above water guide plate 34 can adopt the structure as shown in Figure 1 Refer to Figure 1 There is a connecting rod 35 between the water guide plate 34 and the screw rod 23. The connecting rod 35 is fixedly connected to the water guide plate 34 and detachably connected to the screw rod 23. A plurality of connecting rods 35 are arranged at intervals in the vertical direction. The detachable design of the water guide plate 34 brings great flexibility to the test device. When the flushing test is not required, the water guide plate 34 can be disassembled to avoid interference with other tests (such as the dripping test or the immersion test); at the same time, the detachable water guide plate 34 also facilitates maintenance and cleaning, and is also convenient for replacing and adjusting the water guide plate 34 according to the sizes and shapes of different power metering devices 70.

[0041] For example, if the power metering device 70 is larger in size, a larger-sized water guide plate 34 can be selected to ensure that the water flow can be effectively guided to cover the entire power metering device 70 during flushing.

[0042] Under the guidance of the water guide plate 34, the water flow can more accurately impact specific parts of the power metering device 70. For example, key parts of the power metering device 70 (such as sealing parts and connecting parts) can be focused on for testing, and the reliability of these parts under the impact of water flow can be better evaluated. The water guide plate 34 can also make the distribution of the water flow more uniform, avoiding the situation of too strong or too weak local water flow, ensuring that the power metering device 70 is subjected to a relatively consistent water flow impact during the entire flushing test, and improving the reliability and repeatability of the test results.

[0043] The water guide plate 34 adds an important functional module to the test device, further improving the flexibility and practicality of the test device. Working together with other test components (such as the water pipe 32, the nozzle 33, the first test area, etc.), it can more comprehensively simulate various situations that the power metering device 70 may face under flood disasters, providing a more accurate and effective means for the reliability test of the power metering device; the detachable water guide plate 34 and the adjustable parameter design enable the test device to adapt to different types and specifications of power metering devices 70, meet different test requirements, and improve the versatility and applicability of the test device.

[0044] Among them, the connecting rod 35 can be connected to the screw rod 23 by means of bolt connection, plug connection, hinge connection, etc. The water guide plate 34 is fixed through the connecting rod 35. The structure is simple, the disassembly and assembly are convenient, and no complex tools or equipment are required, greatly improving the efficiency of disassembly and assembly. And a plurality of connecting rods 35 are arranged at intervals in the up and down direction, improving the stability of the water guide plate 34 and avoiding the phenomenon that the water guide plate 34 is skewed under the scouring of the water flow.

[0045] In some embodiments, an improved implementation manner of the above reliability test device can adopt the structure as Figure 1 shown. Refer to Figure 1 , a splash plate 50 is further provided in the water tank 10 below the lifting seat 21, and the splash plate 50 is horizontally arranged. That is, the plate surface of the splash plate 50 is parallel to the horizontal direction. By setting the splash plate 50, when performing the dripping test or the flushing test, the water falling on the splash plate 50 will splash in different directions on the splash plate 50, increasing the contact area and contact dust accumulation between the water and the power metering device 70. This splashing effect can truly simulate the irregular flow and impact of the water flow under flood disasters, making the power metering device 70 face a more complex water intrusion situation during the test, so as to better evaluate its reliability in a real flood environment.

[0046] In actual flood disasters, the flow path of water is very complex. There is not only direct water flow impact, but also splashing water flow generated by factors such as obstacle blockage and water flow rebound. The presence of the splash plate 50 enables water to splash onto the power metering device 70 at various angles and intensities. It can not only test the performance of the power metering device 70 under direct water flow impact, but also evaluate its reliability under indirect water intrusion conditions, such as the possibility of splashing water droplets entering the interior of the power metering device 70. Such comprehensive testing can more effectively discover potential problems that may exist in the power metering device 70 during flood disasters, providing a more accurate basis for product improvement and optimization.

[0047] In some embodiments, a specific implementation manner of the above-mentioned splash plate 50 can adopt, for example Figure 1 the structure shown. Refer to Figure 1 , the splash plate 50 includes two semi-circular plate bodies 51. Each plate body 51 is provided with a surrounding portion 52, and the surrounding portion 52 is fixedly connected to the screw rod 23. The surrounding portions 52 on the two plate bodies 51 are spliced to form a ring and sleeved on the outer periphery of the screw rod 23. At the same time, the two semi-circular plate bodies 51 are combined into a circular splash plate 50. This structure facilitates the disassembly of the splash plate 50, avoiding interference with other tests or operations. At the same time, the detachable splash plate 50 is convenient for maintenance and replacement.

[0048] The detachable splash plate 50 can cooperate with other test components (such as the water pipe 32, the nozzle 33, the water guide plate 34, etc.), and can more comprehensively and realistically simulate the flood disaster environment, improving the accuracy and reliability of the test. The detachable design makes the test device more flexible and versatile, capable of adapting to the test requirements of different types and specifications of power metering devices 70. At the same time, it is also convenient for the maintenance and upkeep of the test device, extending its service life.

[0049] Optionally, the surrounding portion 52 can adopt a hoop.

[0050] In some embodiments, a specific driving method of the above-mentioned rotating disk 42 can adopt, for example Figure 1 the structure shown. Refer to Figure 1 , a second motor 60 is provided at the top of the water tank 10. The output shaft of the second motor 60 is fixedly connected with a gear 61, and teeth 46 meshing with the gear 61 are provided on the outer periphery of the rotating disk 42. By turning on the second motor 60 to drive the gear 61 to rotate, when the gear 61 rotates, it meshes with the teeth 46 on the outer periphery of the rotating disk 42, driving the rotating disk 42 to rotate and switch different water dripping areas 43. This structure is convenient to control, replacing manual operation and being easy to operate.

[0051] In some embodiments, an improved implementation manner of the above-mentioned water tank 10 can adopt, for example Figure 1 the structure shown. Refer to Figure 1, a side wall of the water tank 10 is provided with an opening and closing door 13. The opening and closing door 13 provides a convenient entrance to the test space inside the water tank 10. During the testing process, when it is necessary to install, disassemble, adjust or maintain the power metering device 70, the water guide plate 34, the splash plate 50, etc., the operator can easily enter the water tank 10 by opening the opening and closing door 13, without the need to complexly disassemble the side wall of the water tank 10 or bypass the side wall of the water tank 10 for operation. The design of the opening and closing door 13 takes into account the convenience of operation. The opening and closing door 13 can adopt forms such as a sliding door or a hinge door, and a suitable door type can be selected according to the actual space and the requirements of the operation vehicle. At the same time, the size of the door body should be large enough to ensure that the operator can conveniently carry tools and equipment into the water tank 10.

[0052] It is easy to think that in order to avoid water leakage in the first test area, the opening and closing door 13 can be located in the second test area, or the opening and closing door 13 straddles the first test area and the second test area. A corresponding sealing measure is required at the intersection of the opening and closing door 13 and the side wall of the water tank 10. The sealing measure can adopt a structure commonly used in the technical field, which will not be elaborated here. Similarly, the screw rod 23 is rotatably matched with the bottom of the water tank 10 and needs to be connected to the first motor 22 at the bottom of the water tank 10. Therefore, a corresponding sealing measure is also required here.

[0053] In some embodiments, a specific implementation manner of the above water tank 10 can adopt the structure as Figure 1 shown. Refer to Figure 1 , the water tank 10 includes a bottom box 11 with an opening at the top, and an annular enclosure 12 detachably connected to the top of the bottom frame. The bottom box 11 encloses to form a first test area, and the enclosure 12 encloses to form a second test area. The bottom box 11 with an opening at the top facilitates the operator to directly put the power metering device 70 into the first test area inside the bottom box 11 from the top. And the bottom box 11 can also be used alone only for immersion testing. When the bottom box 11 is used alone, the power metering device 70 is put into the bottom box 11, and by introducing different amounts of test water into the bottom box 11, the influence of different immersion depths on the power metering device 70 can be judged; the annular enclosure 12 forms a specific test space (i.e., the second test area) at the upper end of the bottom box 11. This test space provides a relatively independent test environment for the power metering device 70. The enclosure 12 can prevent water from splashing everywhere during the test, ensuring that the water can be concentrated inside the water tank 10 to effectively test the power metering device 70.

[0054] By replacing the enclosure 12, the size of the second test area can also be adjusted. A suitable test space can ensure that the power metering device 70 can fully contact the water, and at the same time, it will not waste water resources or affect the test accuracy due to too large a space.

[0055] Meanwhile, the enclosure 12 can also protect the test environment. When conducting a flushing test or a dripping test, it can block the splashing water. The water splashing on the inner wall of the enclosure 12 will flow back into the bottom box 11, avoiding waste of water resources and keeping the test site clean and safe.

[0056] Based on the same inventive concept, an embodiment of the present application further provides a reliability test method for an electric power metering device, which is implemented by the above-mentioned reliability test device for an electric power metering device and includes the following steps: S10: Fix the electric power metering device 70 on the lifting seat 21. At this time, the lifting seat 21 is in the second test area; S20: Turn on the second water pump 41 and rotate to switch different dripping areas 43 to correspond to the water outlet of the second water pump 41 until the dripping tests are completed for all the dripping areas 43; S30: Turn on the first water pump 31 and switch the water pipe 32 and the nozzle 33 to spray on the top of the electric power metering device 70 until the flushing test is completed; S40: The lifting seat 21 drives the electric power metering device 70 to descend to the first test area. At this time, the electric power metering device 70 is immersed in the test water for a preset duration; S50: Take out the electric power metering device 70 and compare it with a standard metering device to observe the change in the metering value.

[0057] Compared with the prior art, in the reliability test method for the electric power metering device provided in this embodiment, when performing the reliability test on the electric power metering device 70, the dripping test is first performed, then the flushing test, and finally the immersion test. The test sequence is sorted according to the amount of water, which can ensure an effective and sufficient test of the electric power metering device 70. Finally, it is compared with a standard metering device (including the surface, internal, performance, etc.) to observe the change in the metering value of the tested electric power metering device 70, so as to determine whether the electric power metering device 70 is damaged. Through this test method, a comprehensive test of the electric power metering device 70 can be carried out, which is beneficial to evaluating the actual situation of the electric power metering device 70 and improving the manufacturing process of the electric power metering device 70 according to the evaluation results, and is beneficial to improving the production quality of the electric power metering device 70.

[0058] During actual testing, the power metering device 70 can be simultaneously subjected to dripping test, flushing test, and immersion test, and then its performance can be evaluated. If damage occurs, the power metering devices 70 of the same batch will be individually tested (such as only one of the dripping test, flushing test, and immersion test) to determine the decisive factors causing the damage to the power metering device 70. And in the individual dripping test, different dripping environments will also be simulated by switching different dripping areas 43, and the height of the lifting seat 21 will be adjusted to change the distance between the power metering device 70 and the rotating disk 42; in the individual flushing test, the water pipe 32 and the nozzle 33 will be switched, the water pipe 32 will be replaced with different water pressures or angles, and the nozzle 33 will be replaced with different types and water pressures; in the individual immersion test, the immersion depth of the lifting seat 21 in the water will be switched.

[0059] Moreover, the power metering device 70 can be tested in multiple stages, and the test duration for the power metering device 70 in multiple stages gradually increases.

[0060] For example, it is divided into four stages: the first stage is tested for half an hour, the second stage is tested for 3 to 6 hours, the third stage is tested for 6 to 12 hours, and the fourth stage is tested for 1 to 3 days.

[0061] First stage: Rapidly screen for potential serious problems, mainly observe the immediate response of the power metering device 70 to short-term water intrusion, simulate a short heavy rain or local waterlogging, and then observe water droplet traces, color changes, or surface damage, and preliminarily check whether the electrical connection is normal and whether there are signs of short circuits, etc.

[0062] Second stage: Simulate the impact of medium-duration floods, test the stability of the power metering device 70 under long-term water intrusion, simulate a long-lasting heavy rain or local flood, and then observe the water seepage situation, electrical performance, changes in test accuracy, signal stability, and whether the mechanical structure is deformed or loose.

[0063] Third stage: Further test the reliability of the power metering device 70 under long-term water intrusion, discover potential chronic problems, simulate a more serious flood situation, soak in water for a long time under continuous water pressure and water erosion, and then observe the electrical insulation performance, whether the electronic components are damaged or their performance declines, the reliability of the sealing structure, and whether there is slow water seepage.

[0064] Fourth stage: Highly simulate the long-term performance of the power metering device 70 under extreme flood disaster scenarios, provide a more rigorous evaluation report for actual applications, simulate large-scale and long-term flood disasters, continuously suffer water impact and immersion in a harsh environment, and then observe the measurement accuracy test, long-term stability evaluation of electrical performance, durability inspection of the mechanical structure, and whether corrosion and aging occur.

[0065] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A reliability test device for electric power metering equipment, characterized in that: It comprises a water tank, a lifting mechanism, a spray test assembly and a drip test assembly, wherein the water tank has a first test area located at the bottom and a second test area located at the top; the lifting mechanism is arranged in the water tank, and the lifting mechanism has a lifting seat for installing an electric power metering device; the spray test assembly comprises a first water pump connected to the first test area, a water pipe and a nozzle connected to the water pump, the water pipe and the nozzle are both fixed to the water tank and located in the second test area; the drip test assembly comprises a second water pump connected to the first test area, a rotating disk arranged on the top of the water tank, the water outlet of the second water pump is located above the rotating disk, the rotating disk is located above the lifting seat, a plurality of drip areas are arranged on the rotating disk, different drip areas are used to simulate different dripping conditions, and the rotating disk is used to rotate and switch different drip areas located below the water outlet of the second water pump.

2. The reliability testing device for electric power metering equipment according to claim 1, characterized in that: The rotating disk is provided with a plurality of partitions, and a dripping area is formed between each two adjacent partitions. The rotating disk corresponding to each dripping area is provided with a plurality of dripping holes, and the dripping holes in adjacent dripping areas have different apertures and / or densities.

3. The reliability testing device for electric power metering equipment according to claim 1, characterized in that: The lifting mechanism also includes: A first motor is fixedly connected to the bottom of the water tank; A screw rod is drivingly connected to the output shaft of the first motor, the screw rod is rotatably engaged in the water tank, and the screw rod is parallel to the up and down direction; Wherein, the lifting seat includes two fixing frames, which are symmetrically arranged on both sides of the screw rod and are threadedly connected to the screw rod.

4. The reliability testing device for electric power metering equipment according to claim 3, characterized in that: The spray test assembly also includes a water guide plate, which is arranged in the water tank and located above the lifting seat. The water guide plate gradually tilts toward the screw from top to bottom, and the top surface of the water guide plate is lower than the height of the water pipe and the nozzle.

5. The reliability testing device for electric power metering equipment according to claim 4, characterized in that: A connecting rod is provided between the water guide plate and the screw rod. The connecting rod is fixedly connected to the water guide plate and detachably connected to the screw rod. A plurality of connecting rods are arranged at intervals along the up-down direction.

6. The reliability testing device for electric power metering equipment according to claim 3, characterized in that: A splash plate is also provided in the water tank and is located below the lifting seat. The splash plate is arranged horizontally.

7. The reliability testing device for electric power metering equipment according to claim 6, characterized in that: The splash plate comprises two semicircular plate bodies, each of which is provided with an embracing portion, and the embracing portion is fixedly connected to the screw rod.

8. The reliability testing device for electric power metering equipment according to claim 1, characterized in that: A second motor is arranged on the top of the water tank, a gear is fixedly connected to the output shaft of the second motor, and teeth meshing with the gear are arranged on the outer periphery of the rotating disk.

9. The reliability testing device for electric power metering equipment according to claim 1, characterized in that: The side wall of the water tank is provided with an opening and closing door.

10. A reliability testing method for electric power metering equipment, characterized in that: The reliability test device for the electric power metering device according to any one of claims 1 to 9 is implemented, comprising the following steps: S10: Fix the power metering device on the lifting seat, and the lifting seat is in the second test area; S20: Turn on the second water pump and rotate and switch different dripping areas to correspond to the water outlets of the second water pump until the dripping test is completed in multiple dripping areas; S30: Start the first water pump, switch the water pipe and the nozzle to spray on the top of the power metering equipment until the flushing test is completed; S40: The lifting seat drives the electric power metering device downward to the first test area, and the electric power metering device is immersed in the test water for a preset time; S50: Take out the power metering device and compare it with the standard metering device to observe the change of the metering value.

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