A breakdown voltage detection device for insulating oil

Abstract

The utility model discloses a kind of breakdown withstand voltage detection devices for insulating oil, it is related to insulating oil detection equipment technical field, including detection box, a pair of mounting block is fixedly connected in detection box, and explosion-proof ceramic block is fixedly connected in mounting block side wall, detection tube is installed between two explosion-proof ceramic blocks, the top of detection tube is communicated with oil inlet pipe, electrode assembly is detachably connected on explosion-proof ceramic block, electrode assembly is detachably connected with external tester by wire, electric conductor is embedded in explosion-proof ceramic block, electric conductor is inserted into detection tube, electrode assembly is contacted with electric conductor.The utility model connects detection tube by explosion-proof ceramic block, when high-voltage arc is generated when insulating oil breakdown, the high-temperature resistance, insulation characteristics of ceramic can effectively isolate arc energy, prevent explosion or fire risk;Electrode assembly and explosion-proof ceramic block are detachable, and electrode assembly and external tester are detachably connected, convenient for quick replacement or maintenance, adapt to different test needs.

Description

Technical Field

[0001] This utility model relates to the technical field of insulating oil testing equipment, and in particular to a breakdown withstand voltage testing device for insulating oil. Background Technology

[0002] The withstand voltage test, also known as the breakdown test, of insulating oil involves placing the oil in an electric field environment to test at what voltage the oil's resistance drops dramatically, causing a surge in current. A significant number of high-voltage electrical devices used in power systems are oil-filled, and the operational stability of these devices largely depends on the withstand voltage performance of the insulating oil. Different types of insulating oils have different insulation properties and exhibit different behaviors under different voltage conditions. Therefore, a withstand voltage test is necessary before use to determine the specific withstand voltage performance of each type of insulating oil.

[0003] In existing testing equipment, the test electrode is usually integrated with the test tube, which limits the range that the test electrode can detect. Furthermore, repairing the test electrode after it is damaged is inconvenient and increases maintenance costs.

[0004] Therefore, there is an urgent need for a breakdown withstand voltage testing device for insulating oil to solve the problems existing in the above-mentioned prior art. Utility Model Content

[0005] The purpose of this invention is to provide a breakdown withstand voltage testing device for insulating oil to solve the problems existing in the prior art.

[0006] To achieve the above objectives, this utility model provides the following solution: This utility model provides a breakdown withstand voltage testing device for insulating oil, including a testing box. A pair of mounting blocks are fixedly connected inside the testing box. Explosion-proof ceramic blocks are fixedly connected to the side walls of the mounting blocks. A testing tube is installed between the two explosion-proof ceramic blocks. An oil inlet pipe is connected to the top of the testing tube. An electrode assembly is detachably connected to the explosion-proof ceramic block. The electrode assembly is detachably connected to an external testing instrument via a wire. A conductor is embedded in the explosion-proof ceramic block. The conductor extends into the testing tube, and the electrode assembly is in contact with the conductor.

[0007] Optionally, the electrode assembly includes a mounting plate, a sealing ring is fixedly connected to the bottom surface of the mounting plate, a test electrode is fixedly connected to the center of the bottom surface of the mounting plate, a groove is formed in the explosion-proof ceramic block, the test electrode is located in the groove, and the bottom of the test electrode is in contact with the conductor.

[0008] Optionally, the top surface of the explosion-proof ceramic block is symmetrically provided with a fixing component, which is used to press and fix the mounting plate.

[0009] Optionally, the fixing assembly includes a fixing shaft fixedly connected to the top surface of the explosion-proof ceramic block, a pressing block rotatably connected to the fixing shaft, the pressing block being rotated to contact the mounting plate and press the mounting plate, a connecting plate rotatably connected to the top of the fixing shaft, and a first compression spring sleeved on the outside of the fixing shaft, the first compression spring being located between the pressing block and the connecting plate.

[0010] Optionally, a limiting rod is fixedly connected to the top of one end of the extrusion block away from the fixed shaft. The top of the limiting rod passes through the connecting plate and is slidably connected to the connecting plate. A second compression spring is sleeved on the outside of the limiting rod, and the second compression spring is located between the extrusion block and the connecting plate.

[0011] Optionally, the bottom of the detection tube is connected to an oil unloading pipe, a solenoid valve is installed inside the oil unloading pipe, and the outlet end of the oil unloading pipe is located outside the detection box.

[0012] Optionally, a pressure relief valve is installed on the side of the top of the detection tube away from the oil inlet pipe.

[0013] Optionally, a connecting pipe is connected to the oil inlet pipe, a one-way valve is installed at the end of the connecting pipe near the oil inlet pipe, and a housing is connected to the end of the connecting pipe away from the oil inlet pipe. The housing contains cleaning oil, and a pump is installed in the housing to pump the cleaning oil into the connecting pipe.

[0014] This utility model discloses the following technical effects: In use, insulating oil is introduced into the detection tube through the oil inlet pipe. The electrode assembly is connected to an external tester and energized to perform a withstand voltage test on the insulating oil. Different voltages are required for different types of insulating oil. When the voltage exceeds the withstand range of the electrode assembly, it needs to be replaced. The electrode assembly adopts a modular design, which facilitates replacement and maintenance. This utility model connects the detection tube with an explosion-proof ceramic block. When the insulating oil breaks down and generates a high-voltage arc, the high temperature resistance and insulation properties of the ceramic can effectively isolate the arc energy, preventing the risk of explosion or fire. The detection tube is connected to the external oil circuit through the oil inlet pipe. Combined with the contact design between the conductor and the electrode assembly, it ensures full contact between the test electrode and the insulating oil, improving the accuracy of the breakdown voltage measurement. The electrode assembly and the explosion-proof ceramic block are detachable, and the electrode assembly and the external tester are detachable, facilitating quick replacement or maintenance and adapting to different testing needs. Attached Figure Description

[0015] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0016] Figure 1This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a structural schematic diagram from another perspective of the present invention;

[0018] Figure 3 This utility model Figure 1 A magnified view of part A in the image;

[0019] Figure 4 This is a schematic diagram of the internal structure of the explosion-proof ceramic block of this utility model;

[0020] In the diagram: 1. Detection box; 2. Oil inlet pipe; 3. Mounting block; 4. Explosion-proof ceramic block; 5. Detection tube; 6. Pressure relief valve; 7. Connecting pipe; 8. Box body; 9. Oil discharge pipe; 10. Extrusion block; 11. Fixed shaft; 12. First extrusion spring; 13. Connecting plate; 14. Limiting rod; 15. Second extrusion spring; 16. Mounting plate; 17. Sealing ring; 18. Test electrode; 19. Groove; 20. Conductor. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] Reference Figures 1 to 4 As shown, this embodiment provides a breakdown withstand voltage testing device for insulating oil, including a testing box 1. A pair of mounting blocks 3 are fixedly connected inside the testing box 1. Explosion-proof ceramic blocks 4 are fixedly connected to the side walls of the mounting blocks 3. A testing tube 5 is installed between the two explosion-proof ceramic blocks 4. An oil inlet pipe 2 is connected to the top of the testing tube 5. An electrode assembly is detachably connected to the explosion-proof ceramic block 4. The electrode assembly is detachably connected to an external testing instrument via a wire. A conductor 20 is embedded in the explosion-proof ceramic block 4. The conductor 20 extends into the testing tube 5, and the electrode assembly is in contact with the conductor 20.

[0024] In use, insulating oil is introduced into the detection tube 5 through the oil inlet pipe 2. The electrode assembly is then connected to an external tester and energized to perform a withstand voltage test on the insulating oil. Different voltages are required for different types of insulating oil. When the voltage exceeds the withstand range of the electrode assembly, it needs to be replaced. The electrode assembly adopts a modular design for easy replacement and maintenance. This invention connects the detection tube 5 to the explosion-proof ceramic block 4. When the insulating oil breaks down and generates a high-voltage arc, the high-temperature resistance and insulation properties of the ceramic effectively isolate the arc energy, preventing the risk of explosion or fire. The detection tube 5 is connected to the external oil circuit through the oil inlet pipe 2. The contact design between the conductor 20 and the electrode assembly ensures that the test electrode 18 is in full contact with the insulating oil, improving the accuracy of the breakdown voltage measurement. The electrode assembly and the explosion-proof ceramic block 4 are detachable, and the electrode assembly is also detachably connected to the external tester, facilitating quick replacement or maintenance and adapting to different testing needs.

[0025] Further refining the design, the electrode assembly includes a mounting plate 16, with a sealing ring 17 fixedly connected to the bottom surface of the mounting plate 16. A test electrode 18 is fixedly connected to the center of the bottom surface of the mounting plate 16. A groove 19 is formed inside the explosion-proof ceramic block 4, and the test electrode 18 is located within the groove 19, with its bottom contacting the conductor 20. The sealing ring 17 on the bottom surface of the mounting plate 16 and the groove 19 of the explosion-proof ceramic block 4 form a sealing structure, ensuring the stability of the testing environment. The test electrode 18 is embedded in the groove 19 of the explosion-proof ceramic block 4, directly contacting the conductor 20, reducing testing errors caused by electrode misalignment and improving the consistency of repeated tests.

[0026] Further refining the design, a fixing component is symmetrically arranged on the top surface of the explosion-proof ceramic block 4. The fixing component is used to press and fix the mounting plate 16. The fixing component fixes the mounting plate 16 by mechanical pressing, avoiding electrode loosening due to vibration or external force during the test, and ensuring stable contact between the test electrode 18 and the conductor 20.

[0027] Further refining the design, the fixing assembly includes a fixing shaft 11 fixedly connected to the top surface of the explosion-proof ceramic block 4. A pressing block 10 is rotatably connected to the fixing shaft 11. Rotating the pressing block 10 causes it to contact the mounting plate 16 and press against it. A connecting plate 13 is rotatably connected to the top of the fixing shaft 11. A first compression spring 12 is sleeved on the outside of the fixing shaft 11, located between the pressing block 10 and the connecting plate 13. The rotatable connection design between the fixing shaft 11 and the pressing block 10, combined with the elastic force of the first compression spring 12, allows the fixing assembly to adapt to mounting plates 16 of different sizes, while providing continuous pressing force to keep the electrode assembly stable. Furthermore, the operation is simple and convenient, facilitating the maintenance of the electrode assembly.

[0028] Further refining the design, a limiting rod 14 is fixedly connected to the top of the end of the extrusion block 10 furthest from the fixed shaft 11. The top of the limiting rod 14 passes through the connecting plate 13 and is slidably connected to the connecting plate 13. A second compression spring 15 is sleeved on the outside of the limiting rod 14, and the second compression spring 15 is located between the extrusion block 10 and the connecting plate 13. The combination of the second compression spring 15 and the limiting rod 14 increases the extrusion force of the extrusion block 10 on the mounting plate 16, thereby ensuring the stability and sealing of the electrode assembly after installation and ensuring the normal operation of the testing work.

[0029] The design is further refined: the bottom of the test tube 5 is connected to an oil discharge pipe 9, which contains a solenoid valve. The outlet end of the oil discharge pipe 9 is located outside the test box 1. The cooperation between the oil discharge pipe 9 and the solenoid valve enables the automatic discharge of insulating oil after testing, avoiding pollution or safety risks that may be introduced by manual operation and improving testing efficiency.

[0030] To further refine the design, a pressure relief valve 6 is installed on the top side of the detection pipe 5, away from the oil inlet pipe 2. The pressure relief valve 6 automatically opens when the pressure inside the detection pipe 5 rises abnormally, releasing excess pressure and preventing the detection pipe 5 from rupturing due to overpressure, thus ensuring the safety of operators and equipment.

[0031] The scheme is further refined: a connecting pipe 7 is connected to the oil inlet pipe 2. A one-way valve is installed at the end of the connecting pipe 7 closest to the oil inlet pipe 2, and a housing 8 is connected at the end of the connecting pipe 7 furthest from the oil inlet pipe 2. The housing 8 contains cleaning oil and a pump is installed inside the housing 8. The pump pumps the cleaning oil into the connecting pipe 7. Before the next insulating oil test, the test tube 5 needs to be cleaned to avoid affecting the next test results. The cleaning oil is injected into the connecting pipe 7 by the pump, and then the connecting pipe 7 is used to pass the cleaning oil into the test tube 5. Cleaning the test tube 5 avoids cross-contamination between different batches of oil samples, ensures the independence of each test, and improves the reliability of the results.

[0032] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0033] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A breakdown withstand voltage testing device for insulating oil, characterized in that: The test box (1) includes a pair of mounting blocks (3) fixedly connected inside the test box (1). An explosion-proof ceramic block (4) is fixedly connected to the side wall of the mounting block (3). A test tube (5) is installed between the two explosion-proof ceramic blocks (4). An oil inlet pipe (2) is connected to the top of the test tube (5). An electrode assembly is detachably connected to the explosion-proof ceramic block (4). The electrode assembly is detachably connected to an external tester via a wire. A conductor (20) is embedded in the explosion-proof ceramic block (4). The conductor (20) extends into the test tube (5). The electrode assembly is in contact with the conductor (20).

2. The breakdown withstand voltage testing device for insulating oil according to claim 1, characterized in that: The electrode assembly includes a mounting plate (16), a sealing ring (17) is fixedly connected to the bottom surface of the mounting plate (16), a test electrode (18) is fixedly connected to the center of the bottom surface of the mounting plate (16), a groove (19) is provided in the explosion-proof ceramic block (4), the test electrode (18) is located in the groove (19), and the bottom of the test electrode (18) is in contact with the conductor (20).

3. The breakdown withstand voltage testing device for insulating oil according to claim 2, characterized in that: The explosion-proof ceramic block (4) is symmetrically provided with a fixing component on its top surface, which is used to press and fix the mounting plate (16).

4. The breakdown withstand voltage testing device for insulating oil according to claim 3, characterized in that: The fixing assembly includes a fixing shaft (11) fixedly connected to the top surface of the explosion-proof ceramic block (4). A pressing block (10) is rotatably connected to the fixing shaft (11). The pressing block (10) is rotated to contact the mounting plate (16) and press the mounting plate (16). A connecting plate (13) is rotatably connected to the top of the fixing shaft (11). A first compression spring (12) is sleeved on the outside of the fixing shaft (11). The first compression spring (12) is located between the pressing block (10) and the connecting plate (13).

5. The breakdown withstand voltage testing device for insulating oil according to claim 4, characterized in that: A limiting rod (14) is fixedly connected to the top of one end of the extrusion block (10) away from the fixed shaft (11). The top of the limiting rod (14) passes through the connecting plate (13) and is slidably connected to the connecting plate (13). A second compression spring (15) is sleeved on the outside of the limiting rod (14). The second compression spring (15) is located between the extrusion block (10) and the connecting plate (13).

6. The breakdown withstand voltage testing device for insulating oil according to claim 1, characterized in that: The bottom of the detection tube (5) is connected to the unloading pipe (9), and a solenoid valve is installed inside the unloading pipe (9). The outlet end of the unloading pipe (9) is located outside the detection box (1).

7. The breakdown withstand voltage testing device for insulating oil according to claim 1, characterized in that: A pressure relief valve (6) is installed on the top of the detection tube (5) away from the oil inlet pipe (2).

8. The breakdown withstand voltage testing device for insulating oil according to claim 1, characterized in that: A connecting pipe (7) is connected to the oil inlet pipe (2). A one-way valve is installed at one end of the connecting pipe (7) near the oil inlet pipe (2). A box (8) is connected to the other end of the connecting pipe (7) away from the oil inlet pipe (2). The box (8) contains cleaning oil and a pump is installed inside the box (8). The cleaning oil is pumped into the connecting pipe (7) through the pump.

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