Loss resistance testing device for corrosion-resistant grounding material of transformer substation grounding grid

Abstract

The invention discloses a transformer substation grounding grid corrosion-resistant grounding material anti-loss testing device which comprises a testing box and further comprises a containing bin arranged in the testing box, a control case arranged at the top of the testing box, a touch screen fixedly connected to the top end of the control case, a first wire groove formed in one side of the front face of the testing box, and a second wire groove formed in one side of the front face of the testing box. A first wire harness tube is fixedly connected to the middle of the top end of the first wire groove, the top end of the first wire harness tube is fixedly connected with the control case, and a first wire channel is formed in the first wire groove. The connecting blocks arranged on the two sides of the testing box can make contact with the grounding material needing to be tested, the wire is connected through the busbar, then the wire is connected with the control machine box through the wire groove and the wire harness pipe, the corrosion degree of the grounding material can be analyzed through the resistor, and the real-time resistance of the grounding material can be tested through electrification; the resistivity test of the grounding material can be effectively carried out, the corrosion resistance of the grounding material can be checked without taking out the material, and the steps are simple and convenient.

Description

Technical Field

[0001] This invention relates to the field of grounding material testing technology, and in particular to a test device for corrosion-resistant grounding materials in substation grounding grids to resist grounding loss. Background Technology

[0002] The substation grounding grid is a fundamental overvoltage protection device for high-voltage primary equipment in a power system. When the primary equipment in a substation is struck by lightning or experiences a short-circuit fault, the transient surge current is discharged into the substation soil medium through the grounding down conductor and the buried grounding grid. The surge current energy is released in the form of heat and a small amount of light energy, ensuring that the potential at the high-voltage end of the primary equipment is limited to a safe range. A low grounding resistance is crucial to preventing backflashover and breakdown faults at the high-voltage end of the primary equipment. In actual operation and maintenance, power departments strive to minimize the grounding resistance of the substation grounding grid to ensure the safe operation of high-voltage equipment in the substation.

[0003] A search revealed that Chinese Patent Publication No. CN118190778B relates to the field of grounding material testing technology, specifically a substation grounding grid corrosion-resistant grounding material anti-loss testing device. The device includes a test box and a corrosion-resistant graphite grounding cable. The test box contains soil for testing the anti-loss performance of the graphite grounding cable. The insertion mechanism includes a first motor fixedly connected to the upper end of the test box. A threaded rod is fixedly connected to the movable end of the first motor. A threaded post is threadedly connected to the side wall of the threaded rod. The lower end of the threaded post has an installation groove that mates with the graphite grounding cable. A first L-shaped plate and a second L-shaped plate are fixedly connected to the two opposite side walls of the threaded post, respectively. This invention, by setting up an insertion mechanism, allows the graphite grounding cable to easily enter the soil for anti-loss testing, avoiding the problem in existing technologies where workers need to manually bury the graphite grounding cable in the soil and then squeeze the soil, resulting in slow testing efficiency.

[0004] A search revealed Chinese Patent Publication No. CN106597114A, which discloses a simulated grounding test system and method for grounding materials. The system includes a simulated trench, a grounding grid, and a power supply. The grounding grid is placed in the simulated trench at a preset burial depth, and the trench is filled with sand. The power supply is connected to the grounding grid via a conductor. The simulated trench is obtained by excavating on flat ground. Based on electromagnetic field theory and similarity principles, this invention derives the proportional relationships between various relevant quantities during the simulated test, thus effectively transforming a large-scale test into a small-scale simulated test. Using this invention, a series of simulated tests can be directly conducted on a large grounding grid within a limited area, including grounding resistance measurement, new grounding material testing, resistance-reducing agent testing, and grounding characteristic research. This invention ensures that the test results are consistent with those of a real-world test; the test site is small, allowing for flexible changes in soil resistivity; and a wide variety of tests can be performed, including but not limited to power frequency grounding simulation tests, impulse grounding simulation tests, and long-term corrosion resistance tests of grounding bodies.

[0005] However, in existing technologies, the degree of corrosion of grounding materials cannot be monitored in real time during testing. The degree of corrosion of grounding materials can be analyzed by resistance, but the resistivity of grounding materials cannot be effectively tested. The corrosion resistance of grounding materials can only be checked by taking out the material for inspection, which is a rather cumbersome process.

[0006] To address this issue, we propose a testing device for corrosion-resistant grounding materials in substation grounding grids to test for leakage resistance. Summary of the Invention

[0007] The purpose of this invention is to address the shortcomings of existing technologies by proposing a test device for corrosion-resistant grounding materials in substation grounding networks to prevent grounding loss.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: A substation grounding grid corrosion-resistant grounding material anti-loss testing device includes a test box, and further includes: The test chamber has a storage compartment located inside it, and a control box is located on the top of the test chamber. A touch screen is fixedly connected to the top of the control box. The first wire channel is located on one side of the front of the test box. A first wire harness tube is fixedly connected to the middle position of the top of the first wire channel. The top of the first wire harness tube is fixedly connected to the control box. A first wire channel is provided inside the first wire channel. A first busbar is fixedly connected to the inner side of the first wire channel. A first connecting block is fixedly connected to the inner side of the first busbar. The second wire channel is located on one side of the back of the test box. A second wire harness tube is fixedly connected to the middle position of the top of the second wire channel. The top of the second wire harness tube is fixedly connected to the control box. A second wire channel is provided inside the second wire channel. A second busbar is fixedly connected to the inner side of the second wire channel. A second connecting block is fixedly connected to the inner side of the second busbar.

[0009] More preferably, the first wire groove and the second wire groove are arranged symmetrically around the test box, and the first connecting block and the second connecting block are embedded in the inner wall of the test box.

[0010] More preferably, a support plate is fixedly connected to the bottom of the control box, and a fixing rod is fixedly connected to one side of the bottom of the support plate. The fixing rod is located on the back of the test box and is fixedly connected to the test box by welding.

[0011] More preferably, the four corners of the bottom of the test box are fixedly connected to support blocks, the support blocks are made of insulating rubber, and a water injection pipe is provided on the inner side of the support block. The top of the water injection pipe is fixedly connected to the bottom of the test box.

[0012] More preferably, a water inlet is fixedly connected to the top of the inner chamber of the container, and the bottom end of the water inlet passes through the bottom end of the test box and is fixedly connected to the water inlet pipe, and the spacing between the water inlets is consistent.

[0013] More preferably, the interior of the receiving compartment is provided with fixed supports on both sides, and the fixed supports are fixedly connected to the inner walls of the front and back of the receiving compartment, and the fixed supports are fixedly connected to the receiving compartment by welding.

[0014] More preferably, temperature sensors are fixedly connected to both sides inside the container. The temperature sensors are cylindrical in shape, and the top surface of the temperature sensors and the top surface of the container are located on the same horizontal plane.

[0015] More preferably, a humidity sensor is fixedly connected to both sides of the interior of the container, located on one side of the temperature sensor. The humidity sensor is cylindrical in shape, and the top surface of the humidity sensor and the top surface of the container are located on the same horizontal plane.

[0016] More preferably, a pH detector is fixedly connected to both sides of the interior of the container, located on one side of the humidity sensor. The pH detector is cylindrical in shape, and the top surface of the pH detector and the top surface of the container are located on the same horizontal plane.

[0017] More preferably, the receiving compartment is provided with a lifting bracket inside, the lifting bracket is U-shaped, the bottom end of the lifting handle is connected to the bottom end of the receiving compartment, the lifting bracket is connected to the side wall of the receiving compartment, and handles are fixedly connected to both sides of the top of the lifting handle.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: The test box can be connected to the grounding material to be tested via connecting blocks on both sides. The conductors are connected via busbars, and then the conductors are connected to the control box via conductor channels and wire harnesses. The degree of corrosion of the grounding material can be analyzed by resistance. When energized, the real-time resistance of the grounding material can be tested, which can effectively test the resistivity of the grounding material and check its corrosion resistance without removing the material for inspection. The procedure is relatively simple. Attached Figure Description

[0019] Figure 1 This is a front structural schematic diagram of a substation grounding grid corrosion-resistant grounding material anti-loss testing device proposed in this invention; Figure 2 This is a schematic diagram of the back structure of a substation grounding grid corrosion-resistant grounding material anti-loss testing device proposed in this invention; Figure 3This is a schematic diagram of the bottom structure of a substation grounding grid corrosion-resistant grounding material anti-loss testing device proposed in this invention; Figure 4 for Figure 1 Schematic diagram of the internal structure of the central storage compartment; Figure 5 This is a schematic diagram of the connection structure between the first and second wire grooves.

[0020] In the diagram: 1. Test box; 2. Receptacle; 3. First wire channel; 4. Control box; 5. First wire harness tube; 6. Second wire harness tube; 7. Touch screen; 8. Support plate; 9. Fixing rod; 10. Second wire channel; 11. Support block; 12. Water inlet pipe; 13. Fixing bracket; 14. Temperature sensor; 15. Humidity sensor; 16. pH detector; 17. Water inlet; 18. Lifting bracket; 19. Handle; 20. First wire channel; 21. Second wire channel; 22. First busbar; 23. First connecting block; 24. Second busbar; 25. Second connecting block. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0022] refer to Figure 1 A substation grounding grid corrosion-resistant grounding material anti-loss testing device is disclosed. The grounding material is placed and tested in a test chamber 1. A receiving chamber 2 is located inside the test chamber 1. After the grounding material is placed in the receiving chamber 2, soil is filled into the receiving chamber 2 to simulate a real environment test. A control box 4 is provided on the top of the test chamber 1. The control box 4 is a PLC control box 4. The resistance, temperature, humidity and pH value are detected by a pre-set program. A touch screen 7 is fixedly connected to the top of the control box 4. The control box 4 can be controlled by operating the touch screen 7.

[0023] refer to Figure 1 and Figure 5 The first wire channel 3 is located on one side of the front of the test box 1. The first wire channel 3 is used to accommodate wires. The first wire harness tube 5 is fixedly connected to the middle position of the top of the first wire channel 3. The top of the first wire harness tube 5 is fixedly connected to the control box 4. The first wire harness tube 5 is used to accommodate the wires connecting the first wire channel 3 and the control box 4. The first wire channel 3 is provided with a first wire channel 20 inside. There are multiple first wire channels 20, which can accommodate the wires connecting multiple receiving compartments 2 corresponding to the busbars.

[0024] refer to Figure 1 and Figure 5A first busbar 22 is fixedly connected to the inner side of the first conductor groove 3. The first busbar 22 is used to connect the first connecting block 23. The first connecting block 23 is fixedly connected to the inner side of the first busbar 22. The first connecting block 23 is used to connect the grounding material placed in the storage compartment 2. After being powered on, the first busbar 22, the first connecting block 23 and the grounding material can be connected in series.

[0025] refer to Figure 1 and Figure 5 The second wire guide 10 is located on one side of the front of the test box 1. The second wire guide 10 is used to accommodate wires. A second wire harness tube 6 is fixedly connected to the middle position of the top of the second wire guide 10. The top of the second wire harness tube 6 is fixedly connected to the control box 4. The second wire harness tube 6 is used to accommodate the wires connecting the second wire guide 10 and the control box 4. The second wire guide 10 is provided with a second wire channel 21 inside. There are multiple second wire channels 21, which can accommodate the wires connecting multiple receiving compartments 2 corresponding to the busbars.

[0026] refer to Figure 1 and Figure 5 A second busbar 24 is fixedly connected to the inner side of the second conductor groove 10. The second busbar 24 is used to connect the second connecting block 25. The second connecting block 25 is fixedly connected to the inner side of the second busbar 24. The second connecting block 25 is used to connect the grounding material placed in the storage compartment 2. After being powered on, the second busbar 24, the second connecting block 25 and the grounding material can be connected in series.

[0027] refer to Figure 1 and Figure 5 The grounding material to be tested can be contacted by the connecting blocks set on both sides of the test box 1. The conductor is connected through the busbar, and then the conductor is connected to the control box 4 through the conductor groove and the wire harness tube. The degree of corrosion of the grounding material can be analyzed by resistance. When energized, the real-time resistance of the grounding material can be tested, which can effectively test the resistivity of the grounding material and check the corrosion resistance of the grounding material without removing the material for inspection. The steps are relatively simple.

[0028] refer to Figure 1 and Figure 5 The first wire groove 3 and the second wire groove 10 are symmetrically arranged with the test box 1 as the center, so that the weight at both ends of the test box 1 is consistent, which can improve the balance. The first connecting block 23 and the second connecting block 25 are embedded in the inner wall of the test box 1, so that the side of the first connecting block 23 and the second connecting block 25 facing the receiving chamber 2 can be directly connected to the grounding material.

[0029] refer to Figure 2A support plate 8 is fixedly connected to the bottom of the control box 4. The support plate 8 is used for the control box 4. A fixing rod 9 is fixedly connected to one side of the bottom of the support plate 8. The fixing rod 9 is used to connect the support plate 8 and the test box 1. The fixing rod 9 is located on the back of the test box 1. The fixing rod 9 is fixedly connected to the test box 1 by welding, so the fixing rod 9 has good stability.

[0030] refer to Figure 3 Support blocks 11 are fixedly connected to the four corners of the bottom of the test box 1. The support blocks 11 are used to support the bottom of the test box 1. The support blocks 11 are made of insulating rubber. The insulating rubber material can release static electricity. At the same time, the rubber material has good friction. A water injection pipe 12 is provided on the inner side of the support block 11. The top of the water injection pipe 12 is fixedly connected to the bottom of the test box 1. An external water source can be connected through the water injection pipe 12, so as to simulate the phenomenon of groundwater seepage and more closely resemble the real simulation.

[0031] refer to Figure 4 The top of the container 2 is fixedly connected to a water inlet 17. The bottom of the water inlet 17 passes through the bottom of the test box 1 and is fixedly connected to the water inlet pipe 12. Thus, the water source inside the water inlet pipe 12 can be input from the bottom of the container 2 into the container 2 through the water inlet 17, thereby simulating the phenomenon of groundwater seepage. The spacing between the water inlets 17 is consistent, so that water can be injected into the water inlet 17 evenly, which can more realistically simulate the seepage effect.

[0032] refer to Figure 4 The receiving chamber 2 has fixed brackets 13 on both sides inside. The fixed brackets 13 are fixedly connected to the inner walls of the front and back of the receiving chamber 2. The grounding material to be tested can be placed inside the fixed brackets 13. The fixed brackets 13 are located on the same horizontal plane as the first connecting block 23 and the second connecting block 25, so as to facilitate the connection and fixation of the grounding material to the first connecting block 23 and the second connecting block 25. The fixed brackets 13 are fixedly connected to the receiving chamber 2 by welding, so that the fixed brackets 13 can stably fix the grounding material.

[0033] refer to Figure 4 Temperature sensors 14 are fixedly connected to both sides inside the container 2. The temperature sensors 14 are used to detect the real-time temperature inside the container 2. By adjusting the temperature inside different containers 2, different seasons can be simulated. The temperature sensor 14 is cylindrical in shape. The cylindrical shape has a small contact surface, which is convenient for filling with soil. The top surface of the temperature sensor 14 and the top surface of the container 2 are located on the same horizontal plane, so that the temperature at each height position inside the container 2 can be completely monitored.

[0034] refer to Figure 4Humidity sensors 15 are fixedly connected to both sides of the container 2, located on one side of the temperature sensor 14. The humidity sensor 15 is used to detect the real-time humidity inside the container 2. By adjusting the humidity inside the container 2, different groundwater seepage conditions can be simulated. The humidity sensor 15 is cylindrical in shape. The cylindrical shape has a small contact surface, which is convenient for filling with soil. The top surface of the humidity sensor 15 and the top surface of the container 2 are located on the same horizontal plane, so that the humidity at each height position inside the container 2 can be completely monitored.

[0035] refer to Figure 4 Inside the container 2, on both sides, a pH detector 16 is fixedly connected to one side of the humidity sensor 15. The pH detector 16 is used to detect the real-time pH value inside the container 2. By adjusting the pH value inside different containers 2, different acid and alkali corrosion conditions can be simulated. The pH detector 16 is cylindrical in shape. The cylindrical shape has a small contact surface, which is convenient for filling with soil. The top surface of the pH detector 16 and the top surface of the container 2 are located on the same horizontal plane, so that the pH value at each height position inside the container 2 can be completely monitored.

[0036] refer to Figure 4 The storage compartment 2 is equipped with a lifting bracket 18, which is U-shaped. The bottom end of the lifting bracket 18 is located at the bottom end of the grounding material. The bottom end of the lifting handle 19 is connected to the bottom end of the storage compartment 2. The lifting bracket 18 is connected to the inner side wall of the storage compartment 2. The top two sides of the lifting handle 19 are fixedly connected to the handle 19. By pulling the handle 19, the lifting bracket 18 can be pulled up, thereby pulling the grounding material upward, which can easily remove the grounding material buried in the soil.

[0037] Furthermore, when the terms "first," "second," "third," etc., are used in this application specification to describe various features, these terms are only used to distinguish these features and should not be construed as indicating or implying the correlation or relative importance between features or implicitly indicating the number of features indicated.

[0038] In addition, this application specification describes exemplary embodiments by referring to idealized exemplary cross-sectional views and / or plan views and / or perspective views. Therefore, differences from the illustrated shapes are foreseeable due to factors such as manufacturing techniques and / or tolerances. Therefore, exemplary embodiments should not be construed as limited to the shapes of the regions shown herein, but should include deviations in shape caused, for example, by manufacturing processes. Thus, the regions shown in the figures are substantially schematic, and their shapes are not intended to illustrate the actual shapes of the regions of the device, nor to limit the scope of the exemplary embodiments.

Claims

1. A substation grounding grid corrosion-resistant grounding material loss resistance testing device, comprising a test box (1), characterized in that, Also includes: The accommodation warehouse (2) is arranged inside the test box (1), and the top of the test box (1) is provided with a control case (4), and the top end of the control case (4) is fixedly connected with a touch screen (7); The first wire slot (3) is arranged on one side of the front of the test box (1), and the first wire slot (3) is fixedly connected with the first wire harness pipe (5) at the top end of the first wire slot (3). The top end of the first wire harness pipe (5) is fixedly connected with the control case (4), and the first wire slot (3) is provided with a first wire channel (20) inside. The first wire slot (3) is fixedly connected with a first busbar (22) on the inner side, and the first busbar (22) is fixedly connected with a first connecting block (23) on the inner side. The second wire slot (10) is arranged on one side of the back of the test box (1), and the second wire slot (10) is fixedly connected with the second wire harness pipe (6) at the top end of the second wire slot (10). The top end of the second wire harness pipe (6) is fixedly connected with the control case (4), and the second wire slot (10) is provided with a second wire channel (21) inside. The second wire slot (10) is fixedly connected with a second busbar (24) on the inner side, and the second busbar (24) is fixedly connected with a second connecting block (25) on the inner side. 2.The device for testing the loss resistance of a corrosion-resistant grounding material of a grounding grid of a substation according to claim 1, wherein The first wire slot (3) and the second wire slot (10) are symmetrically arranged with the test box (1) as the center, and the first connecting block (23) and the second connecting block (25) are embedded in the inner wall of the test box (1). 3.The device for testing the loss resistance of the corrosion-resistant grounding material of a grounding grid of a substation according to claim 1, wherein The bottom end of the control case (4) is fixedly connected with a support plate (8), one side of the bottom end of the support plate (8) is fixedly connected with a fixed rod (9), and the fixed rod (9) is arranged on the back of the test box (1). The fixed rod (9) is fixedly connected with the test box (1) by welding.

4. The device for testing the loss resistance of the corrosion-resistant grounding material of a grounding grid of a substation according to claim 1, characterized in that, The bottom end of the test box (1) is fixedly connected with a support block (11), the support block (11) is made of insulating rubber material, and the inner side of the support block (11) is provided with a water injection pipe (12). The top end of the water injection pipe (12) is fixedly connected with the bottom end of the test box (1).

5. The device for testing the loss resistance of the corrosion-resistant grounding material of a grounding grid of a substation according to claim 4, characterized in that, The top end of the accommodation warehouse (2) is fixedly connected with a water injection port (17), and the bottom end of the water injection port (17) penetrates the bottom end of the test box (1) and is fixedly connected with the water injection pipe (12). The spacing between the water injection ports (17) is uniform.

6. The device for testing the loss resistance of the corrosion-resistant grounding material of a grounding grid of a substation according to claim 1, characterized in that, The inner sides of the accommodation warehouse (2) are provided with fixed supports (13), and the fixed supports (13) are fixedly connected to the inner walls of the front and back of the accommodation warehouse (2). The fixed supports (13) are fixedly connected with the accommodation warehouse (2) by welding.

7. The device for testing the loss resistance of the corrosion-resistant grounding material of a grounding grid of a substation according to claim 1, characterized in that, The inner sides of the accommodation warehouse (2) are fixedly connected with temperature sensors (14), the temperature sensors (14) are in the shape of a cylinder, and the top end surface of the temperature sensor (14) is located on the same horizontal plane as the top end surface of the accommodation warehouse (2). 8.The device for testing the loss resistance of a corrosion-resistant grounding material of a grounding grid of a substation according to claim 7, wherein, Both sides of the inside of the accommodating warehouse (2) are fixedly connected with humidity sensors (15) on one side of the temperature sensor (14), the humidity sensor (15) is in the shape of a cylinder, the top end surface of the humidity sensor (15) and the top end surface of the accommodating warehouse (2) are located in the same horizontal plane. 9.The device for testing the loss resistance of the corrosion-resistant grounding material of a grounding grid of a substation according to claim 8, wherein, Both sides of the inside of the accommodating warehouse (2) are fixedly connected with PH value detectors (16) on one side of the humidity sensor (15), the PH value detector (16) is in the shape of a cylinder, the top end surface of the PH value detector (16) and the top end surface of the accommodating warehouse (2) are located in the same horizontal plane. 10.The device for testing the loss resistance of the corrosion-resistant grounding material of a grounding grid of a substation according to claim 1, wherein, The inside of the accommodating warehouse (2) is provided with a lifting support (18), the lifting support (18) is in the shape of a concave, the bottom end surface of the lifting handle (19) and the inside bottom end of the accommodating warehouse (2) are connected, the lifting support (18) and the inside side wall of the accommodating warehouse (2) are connected, the top end of the lifting handle (19) is fixedly connected with a handle (19).

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