Visual device with isolation protection function for transformer

Abstract

This invention discloses a visualization device with isolation and protection function for transformers, relating to the field of transformer protection technology. It includes a top plate with an annular slide rail at its bottom. Three sliding blocks are slidably connected within the annular slide rail. Three connecting rods are fixedly installed on the lower part of the side wall of each sliding block. The three connecting rods are jointly fixedly connected to a set of visualization devices. Each set of visualization devices includes an oil reservoir, an isolation seat, and a flange seat. An oil reservoir cavity is formed between the oil reservoir and the isolation seat. A lower guide tube penetrating the oil reservoir is provided in the middle area of ​​the oil reservoir. An inner oil cup seat is fixedly installed on a portion of the outer side wall of the upper area of ​​the oil reservoir. A first glass cylinder and a second glass cylinder are provided within the oil reservoir cavity. The second glass cylinder is located at the top of the inner oil cup seat and inside the protruding edge of the top outer side of the inner oil cup seat. This allows for the selection of a suitable visualization device based on the real-time operating status of the transformer.

Description

Technical Field

[0001] This invention relates to the field of transformer protection technology, specifically to a visual device for transformers with isolation and protection functions. Background Technology

[0002] A desiccant, also called a transformer breather, is used to remove and dry impurities and moisture from the air that enters the transformer oil conservator due to changes in transformer oil temperature, thus maintaining the insulation strength of the transformer oil. It is a transparent container filled with silica gel granules. Air passes through this filter before entering the transformer to accommodate the thermal expansion and contraction of the transformer oil. The silica gel absorbs moisture from the air, preventing moisture contamination of the transformer oil.

[0003] Current respirators have abandoned structures such as oil seals, but their functions are still limited and they can only be used on low-quality transformers. How to use them with high-quality frequency converter transformers to achieve low-energy consumption and high-efficiency protection is something that current respirators cannot achieve. Therefore, it is necessary to design a visualization device with isolation and protection functions for transformers. Summary of the Invention

[0004] The purpose of this invention is to provide a visualization device for transformers with isolation and protection functions to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a visualization device for transformers with isolation and protection function, including a top plate, an annular slide rail at the bottom of the top plate, three sliding blocks slidably connected inside the annular slide rail, and three connecting rods fixedly installed on the lower part of the side wall of each sliding block, the three connecting rods being fixedly connected to a set of visualization devices.

[0006] According to the above technical solution, each set of visualization devices includes an oil reservoir, an isolation seat, and a flange seat. An oil storage cavity is formed between the oil reservoir and the isolation seat. A lower conduit penetrating the oil reservoir is provided in the middle area of ​​the oil reservoir. An inner oil cup seat is fixedly installed on part of the outer wall of the upper area of ​​the oil reservoir. A first glass cylinder and a second glass cylinder are provided in the oil storage cavity. The second glass cylinder is located on the top of the inner oil cup seat and inside the outer protruding edge of the top of the inner oil cup seat.

[0007] According to the above technical solution, a first oil cavity is formed on the inner side of the first glass tube and the outer side of the second glass tube, and a second oil cavity is formed on the inner side of the second glass tube. Detection liquid is placed in both the first oil cavity and the second oil cavity.

[0008] According to the above technical solution, several infusion holes are provided on the inner oil cup seat.

[0009] According to the above technical solution, a number of first guide holes are evenly arranged on the isolation seat, and a flat washer is provided on the top of the isolation seat. The inner sidewall of the flat washer is located outside the first guide holes. A barrier mesh plate located inside the flat washer is also provided on the top of the isolation seat. A reinforcing plate is provided at the bottom of the isolation seat, and a number of second guide holes matching the specifications of the first guide holes are provided on the reinforcing plate.

[0010] According to the above technical solution, a gas exchange cavity is formed between the isolation seat and the flange seat. A third glass cylinder is provided on the outside of the gas exchange cavity. The third glass cylinder is located on the top of the isolation seat and inside the protruding edge on the top of the isolation seat. The first guide hole is located inside the third glass cylinder.

[0011] According to the above technical solution, an upper conduit is installed on the top of the flange seat.

[0012] According to the above technical solution, a central tube is fixedly installed in the middle area at the bottom of the top plate. The central tube penetrates the top plate and is connected to the transformer assembly at the top. Three telescopic tubes are installed on the sealed pipes on the side wall of the part of the central tube below the top plate. Each telescopic tube is matched with a set of visualization devices, and the end of each telescopic tube is connected to the injection assembly via a sealed pipe.

[0013] According to the above technical solution, the injection assembly includes a lifting tube fixed to the end of the telescopic tube, a sealing cylinder fixedly installed at the bottom of the lifting tube, a sealing strip fixedly installed on the outer bottom area of ​​the sealing cylinder, a pipe connection between the sealing cylinders, and the sealing cylinder matching the upper guide tube.

[0014] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: Firstly, since transformers are long-term operating devices, transformer breathers are used to protect them during their operation. However, the lifespan of the detection fluid in the transformer breather varies depending on the real-time operating power of the transformer, which is affected by environmental factors. The three visualization devices reduce the probability of transformer damage caused by the failure of the detection fluid in the visualization devices, and also reduce the frequency of manual fluid replacement by replacing the detection fluid in all three visualization devices at once. Secondly, the detection fluid in the three visualization devices is of inconsistent quality, which can be used on high-power variable frequency transformers. That is, when the variable frequency transformer is operating at low power, a visualization device filled with low-quality detection fluid can be used; when the variable frequency transformer is operating at high power, a visualization device filled with high-quality detection fluid can be used. This matches the real-time operating status of the transformer, allowing the transformer to circulate with the outside air in a timely manner and ensuring the air remains dry even during rapid circulation. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0016] Figure 1 This is a schematic diagram of the overall frontal three-dimensional structure of the present invention;

[0017] Figure 2 This is a schematic diagram of the overall bottom three-dimensional structure of the present invention;

[0018] Figure 3 This is a three-dimensional structural schematic diagram of the visualization device of the present invention;

[0019] Figure 4 This is a schematic diagram of the exploded structure of the visualization device of the present invention. Figure 1 ;

[0020] Figure 5 This is a schematic diagram of the exploded structure of the visualization device of the present invention. Figure 2 ;

[0021] Figure 6 This is a plan view of the visualization device of the present invention;

[0022] Figure 7 This is a schematic diagram of the isolation seat structure of the present invention;

[0023] Figure 8 This is a schematic diagram of the injection component structure of the present invention;

[0024] Figure 9 This is a schematic diagram of the telescopic tube of the present invention;

[0025] In the diagram: 1. Oil reservoir; 2. Isolation seat; 3. Flange seat; 4. Oil reservoir cavity; 5. First glass cylinder; 6. Second glass cylinder; 7. Bolt seat; 8. Lower guide tube; 9. Inner oil cup seat; 10. First nitrile rubber gasket; 11. Second nitrile rubber gasket; 12. Infusion port; 13. First guide hole; 14. Flat washer; 15. Barrier mesh plate; 16. Reinforcing plate; 17. Second guide hole; 18. Gas exchange chamber; 19. Third glass cylinder; 20. Stainless steel fully threaded screw; 21. Hexagonal nut; 22. Third nitrile rubber gasket; 23. Upper guide tube; 24. Top plate; 25. Circular slide rail; 26. Sliding block; 27. Connecting rod; 28. Visualization device; 29. ​​Central tube; 30. Telescopic tube; 31. Injection assembly; 32. Lifting tube; 33. Sealing cylinder; 34. Sealing strip. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Please see Figure 1-9 The present invention provides a technical solution: a visualization device for transformers with isolation and protection function, including a top plate 24, an annular slide rail 25 is provided at the bottom of the top plate 24, three sliding blocks 26 are slidably connected in the annular slide rail 25, three connecting rods 27 are fixedly installed on the lower part of the side wall of each sliding block 26, and the three connecting rods 27 are fixedly connected to a set of visualization devices 28. The visualization device 28 is provided with a detection liquid inlet and outlet for replacing the detection liquid;

[0028] The sliding block 26 is driven to move along the annular slide rail 25 by an intelligent system matched with the entire device. The movement of the sliding block 26 drives the connecting rod 27 to move, and the movement of the connecting rod 27 drives the visualization device 28 to move. The purpose of setting up three sets of visualization devices 28 is as follows: First, since the transformer is a long-term operating device, it is protected by a transformer breather during its operation. However, the service life of the detection fluid in the transformer breather will change according to the real-time operating power of the transformer. The operating power of the transformer will be affected by environmental factors and thus change. The setting of three visualization devices 28 can reduce the probability of transformer damage caused by the failure of the detection fluid in the visualization devices 28. It can also reduce the frequency of manual replacement of the detection fluid by replacing the detection fluid in the three visualization devices 28 at one time. Second, the detection fluid in the three visualization devices 28 is of different quality. It can be used on high-power frequency converter transformer equipment. That is, when the frequency converter transformer is running at low power, a visualization device 28 filled with low-quality detection fluid can be used. When the frequency converter transformer is running at high power, a visualization device 28 filled with high-quality detection fluid can be used. This matches the real-time operating status of the transformer, so that the transformer can circulate with the outside air in a timely manner and ensure that the air is dry even when circulating rapidly.

[0029] The quality of the test solution is divided into low quality, medium quality and high quality. The drying speed of the same volume of test solution to the same specification of air per unit time is used as the standard for judging the quality of the test solution. If the drying speed of the same volume of test solution to the same specification of air per unit time is slow, it is judged as low quality test solution. If the drying speed of the same volume of test solution to the same specification of air per unit time is fast, it is judged as high quality test solution.

[0030] Each visualization device 28 includes an oil reservoir 1, an isolation seat 2, and a flange seat 3. An oil reservoir 4 is formed between the oil reservoir 1 and the isolation seat 2. Three protruding bolt seats 7 are evenly arranged on the outer side wall of the oil reservoir 1, and a lower guide tube 8 is provided in the middle area of ​​the oil reservoir 1. An inner oil cup seat 9 is fixedly installed on the outer side wall of the oil reservoir 1 in the area above the oil reservoir 1. A first glass cylinder 5 and a second glass cylinder 6 are provided in the oil reservoir 4. The second glass cylinder 6 is located on the top of the inner oil cup seat 9 and is located inside the outer protruding edge of the top of the inner oil cup seat 9.

[0031] A first oil chamber is formed on the inner side of the first glass cylinder 5 and the outer side of the second glass cylinder 6, and a second oil chamber is formed on the inner side of the second glass cylinder 6. Detection fluid is placed in both the first oil chamber and the second oil chamber. In this embodiment, the detection fluid can be transformer oil.

[0032] The inner oil cup seat 9 is provided with a number of infusion holes 12, through which the first oil chamber is connected to the first oil chamber;

[0033] Three protruding bolt seats 7 are also evenly arranged on the outer side wall of the isolation seat 2. Several first guide holes 13 are evenly arranged on the isolation seat 2. A flat washer 14 is arranged on the top of the isolation seat 2. The inner side wall of the flat washer 14 is located outside the first guide hole 13. A barrier mesh plate 15 is also arranged on the top of the isolation seat 2, located inside the flat washer 14. The barrier mesh plate 15 is used to filter impurities. A reinforcing plate 16 is arranged at the bottom of the isolation seat 2. Several second guide holes 17 that match the specifications of the first guide holes 13 are arranged on the reinforcing plate 16. When installing the reinforcing plate 16, the first guide holes 13 and the second guide holes 17 must be aligned.

[0034] Three protruding bolt seats 7 are also evenly arranged on the outer side wall of the flange seat 3. A gas exchange cavity 18 is formed between the isolation seat 2 and the flange seat 3. The gas exchange cavity 18 is filled with adsorption particles to adsorb moisture and dust in the gas passing through the gas exchange cavity 18. A third glass tube 19 is arranged on the outside of the gas exchange cavity 18. The third glass tube 19 is located on the top of the isolation seat 2 and inside the protruding edge of the top of the isolation seat 2. The first guide hole 13 is located inside the third glass tube 19.

[0035] The oil reservoir 1, the isolation seat 2, and the flange seat 3 are connected by a stainless steel fully threaded bolt 20 installed in the bolt seat 7 and fixed with a hexagonal nut 21.

[0036] First nitrile rubber gaskets 10 are installed between the second glass cylinder 6 and the inner oil cup seat 9, and between the second glass cylinder 6 and the bottom of the isolation seat 2, thereby improving the sealing performance between the second glass cylinder 6 and the inner oil cup seat 9. The first glass cylinder 5 is set on the top of the oil storage seat 1 and is located inside the outer protruding edge of the top of the oil storage seat 1. Second nitrile rubber gaskets 11 are installed between the first glass cylinder 5 and the oil storage seat 1, and between the first glass cylinder 5 and the bottom of the reinforcing plate 16, thereby improving the sealing performance inside the first glass cylinder 5. Third nitrile rubber gaskets 22 are installed between the third glass cylinder 19 and the top of the isolation seat 2, and between the third glass cylinder 19 and the bottom of the flange seat 3, thereby improving the sealing performance inside the third glass cylinder 19.

[0037] An upper conduit 23 is installed on the top of the flange seat 3, and is connected to the transformer assembly through the upper conduit 23, so that changes in the transformer affect the detection fluid;

[0038] A central tube 29 is fixedly installed in the middle area at the bottom of the top plate 24. The central tube 29 penetrates the top plate 24. The top of the central tube 29 is connected to a transformer assembly, which is not shown in the attached drawings. Three telescopic tubes 30 are installed on the sealed pipe on the side wall of the central tube 29 below the top plate 24. Each telescopic tube 30 is matched with a set of visualization devices 28. The end of each telescopic tube 30 is sealed and connected to an injection assembly 31. The function of the injection assembly 31 is to selectively connect to the required visualization devices 28.

[0039] A control valve is installed at the bottom of the central tube 29, which controls which telescopic tube 30 the central tube 29 is connected to.

[0040] The injection assembly 31 includes a lifting tube 32 fixed to the end of the telescopic tube 30. A sealing cylinder 33 is fixedly installed at the bottom of the lifting tube 32. A sealing strip 34 is fixedly installed on the outer bottom area of ​​the sealing cylinder 33. The sealing cylinders 33 are connected by a pipe. It should be noted that both the telescopic tube 30 and the lifting tube 32 are existing technology structures and can be electrically controlled. The sealing cylinder 33 is matched with the upper conduit 23. The intelligent system drives the telescopic tube 30 to extend to the top of the selected visualization device 28, so that the sealing cylinder 33 is aligned with the upper conduit 23. Then, the lifting tube 32 is driven to descend, causing the sealing cylinder 33 to descend to the top of the upper conduit 23, so that the transformer is connected to the visualization device 28 selected by the intelligent system.

[0041] The sealing cylinder 33 has a built-in first intelligent valve. The first intelligent valve is opened only after it is confirmed that the sealing cylinder 33 has been connected to the visualization device 28 selected by the intelligent system.

[0042] The upper conduit 23 has a built-in second intelligent valve. The second intelligent valve is opened after it is confirmed that the sealing cylinder 33 has been connected to the visualization device 28 selected by the intelligent system.

[0043] When the real-time operating power of the transformer increases, the internal temperature of the transformer rises, causing the transformer oil to expand. The air pressure inside the transformer's oil conservator increases, causing it to exhale. This air enters the telescopic pipe 30 through the central pipe 29, then the lifting pipe 32, and finally the sealing cylinder 33. The sealing cylinder 33 is controlled by an intelligent system and connected to a suitable visualization device 28. Air then enters the upper conduit 23 through the sealing cylinder 33, and subsequently the gas exchange chamber 18. The air entering the gas exchange chamber 18 increases the air pressure, and then enters the first glass cylinder 5 through the first guide hole 13 and the second guide hole 17. The level of the detection liquid in the first glass cylinder 5 drops due to pressure. The detection liquid in the first glass cylinder 5 then enters the second glass cylinder 6 through the inlet hole 12, causing the level of the detection liquid in the second glass cylinder 6 to rise. The level of the detection liquid in the second glass cylinder 6 does not exceed the top surface of the lower conduit 8. When the level of the detection liquid in the first glass tube 5 is lower than the height of the infusion hole 12, gas enters the second glass tube 6 through the infusion hole 12, enters the lower conduit 8 through the detection liquid, and finally enters the breather connected to the lower conduit 8. When the real-time operating power of the transformer decreases and the internal temperature of the transformer decreases, the transformer oil contracts, the air pressure in the oil conservator decreases and draws air inward. The air in the gas exchange chamber 18 enters the sealing cylinder 33 through the upper conduit 23, then enters the riser pipe 32, and then enters the central pipe 29 through the telescopic pipe 30. Finally, the gas enters the transformer assembly, causing the air pressure in the gas exchange chamber 18 to decrease, which causes the level of the detection liquid in the first glass tube 5 to rise. The detection liquid in the second glass tube 6 enters the first glass tube 5 through the infusion hole 12, causing the level of the detection liquid in the second glass tube 6 to drop. When the level of the detection liquid in the second glass tube 6 is lower than the height of the infusion hole 12, air enters the gas exchange chamber 18 through the infusion hole 12 and then enters the transformer assembly.

[0044] By observing the levels of the detection liquid in the first glass tube 5 and the second glass tube 6 through a visualization device, it can be determined whether the breathing of the maintenance-free respirator is normal.

[0045] The selection requirements for the intelligent system are as follows: The transformer's operating power is set as P, divided into three levels: P1 to P3. P1 indicates the transformer is operating at low power, and P3 indicates it is operating at high power. When the transformer is at level P1, the intelligent system selects the visualization device 28 with internal low-quality detection fluid, and the transformer must remain continuously connected to one of these devices. When the transformer is at level P2, the intelligent system drives one of the telescopic pipes 30 to connect to the visualization device 28 with internal low-quality detection fluid. At this time, the transformer and the visualization device 28 remain continuously connected. This is to ensure the transformer is always connected to the visualization device 28 and also to allow for future reconnection to the internal low-quality detection fluid visualization device 28, as the transformer operates at low power for the longest period. When one of the telescopic pipes 30 is successfully connected to the visualization device 28 containing the quality detection liquid, the gas flow between the transformer and the visualization device 28 containing the low-quality detection liquid is disconnected by controlling the valve. When the transformer is at level P3, the intelligent system drives one of the telescopic pipes 30 to connect to the visualization device 28 containing the high-quality detection liquid. The same process is followed, maintaining the connection with the visualization device 28 containing the low-quality detection liquid. Once connected to the visualization device 28 containing the high-quality detection liquid, the gas flow between the two devices is disconnected. This achieves the goal of selecting the appropriate visualization device 28 based on the real-time operating status of the transformer, maintaining the high efficiency of the transformer operation, the efficiency of the detection liquid usage, and ensuring that the transformer can achieve air purification and drying over a long period of time.

[0046] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0047] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A visualization device for transformers with isolation and protection functions, comprising a top plate (24), characterized in that: The bottom of the top plate (24) is provided with an annular slide rail (25), and three sliding blocks (26) are slidably connected inside the annular slide rail (25). Three connecting rods (27) are fixedly installed on the lower part of the side wall of each sliding block (26). The three connecting rods (27) are fixedly connected to a set of visualization devices (28). The three sets of visualization devices (28) are filled with detection liquid of different masses. Each set of visualization devices (28) includes an oil reservoir (1), an isolation seat (2), and a flange seat (3). An oil reservoir cavity (4) is formed between the oil reservoir (1) and the isolation seat (2). A lower conduit (8) is provided in the middle area of ​​the oil reservoir (1) and passes through the oil reservoir (1). An inner oil cup seat (9) is fixedly installed on a portion of the outer side wall of the upper area of ​​the oil reservoir (1). A first glass cylinder (5) and a second glass cylinder (6) are provided in the oil reservoir cavity (4). The second glass cylinder (6) is located at the top of the inner oil cup seat (9) and inside the outer protruding edge of the top of the inner oil cup seat (9). A first oil cavity is formed on the inner side of the first glass tube (5) and the outer side of the second glass tube (6), and a second oil cavity is formed on the inner side of the second glass tube (6). Detection liquid is placed in both the first oil cavity and the second oil cavity. The inner oil cup holder (9) is provided with several infusion holes (12); The isolation seat (2) is provided with a plurality of first guide holes (13) evenly arranged, and a flat washer (14) is provided on the top of the isolation seat (2). The inner sidewall of the flat washer (14) is located outside the first guide hole (13). The top of the isolation seat (2) is also provided with a barrier mesh plate (15) located inside the flat washer (14). The bottom of the isolation seat (2) is provided with a reinforcing plate (16). The reinforcing plate (16) is provided with a plurality of second guide holes (17) that match the specifications of the first guide hole (13). A gas exchange chamber (18) is formed between the isolation seat (2) and the flange seat (3). A third glass cylinder (19) is provided on the outside of the gas exchange chamber (18). The third glass cylinder (19) is located on the top of the isolation seat (2) and inside the outer protruding edge of the top of the isolation seat (2). The first guide hole (13) is located inside the third glass cylinder (19).

2. A visualization device for transformers with isolation and protection functions according to claim 1, characterized in that: The flange seat (3) is provided with an upper conduit (23) on top.

3. A visualization device for transformers with isolation and protection functions according to claim 2, characterized in that: A central tube (29) is fixedly installed in the middle area of ​​the bottom of the top plate (24). The central tube (29) penetrates the top plate (24). The top of the central tube (29) is connected to a transformer assembly. Three telescopic tubes (30) are installed on the sealed pipe on the side wall of the central tube (29) below the top plate (24). Each telescopic tube (30) is matched with a set of visualization devices (28). The end of each telescopic tube (30) is sealed and connected to an injection assembly (31).

4. A visualization device for transformers with isolation and protection function according to claim 3, characterized in that: The injection assembly (31) includes a lifting tube (32) fixed to the end of the telescopic tube (30), a sealing cylinder (33) is fixedly installed at the bottom of the lifting tube (32), a sealing strip (34) is fixedly installed on the outer bottom area of ​​the sealing cylinder (33), the sealing cylinder (33) is connected to the sealing cylinder (33) by a pipe, and the sealing cylinder (33) is matched with the upper guide tube (23).

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