Transformer oil injection liquid level monitoring device
The liquid level monitoring device, which combines seamless tubes and pressure probes with pressure difference calculation, solves the problems of low accuracy and poor real-time performance in traditional transformer liquid level monitoring, achieving high-precision real-time monitoring and ensuring the stability and safety of transformer operation.
Patent Information
- Application Number
- CN202520676561.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-11
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-04-11
AI Technical Summary
Traditional methods for monitoring transformer oil levels have low accuracy, are easily affected by environmental factors, and cannot achieve real-time monitoring, leading to safety hazards and operational instability.
It adopts components such as seamless pipe, pressure probe, ball valve, protective shell, and sealing cover. By using the pressure difference calculation formula P=ρgh and combining high and low pressure probes to measure liquid level, a double sealing structure is designed to prevent impurities from entering, thus achieving high-precision real-time monitoring.
It achieves high-precision real-time monitoring of transformer oil level, with measurement error controlled within ±5cm, improving operating efficiency and safety, extending equipment life and reducing failure rate.
Smart Images
Figure CN223896875U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of transformer monitoring technology, and in particular to a transformer oil level monitoring device. Background Technology
[0002] Traditional methods for monitoring transformer oil levels often employ simple level sensors or float-type level gauges. These methods have low monitoring accuracy and are easily affected by environmental factors such as changes in temperature and pressure, leading to inaccurate monitoring results. Furthermore, the complexity of the transformer tank's internal structure makes the installation and commissioning of level sensors or float-type level gauges challenging, further impacting monitoring accuracy.
[0003] Traditional methods for monitoring transformer oil levels often fail to provide real-time monitoring, requiring regular manual inspections and data recording. This method is not only time-consuming and labor-intensive, but also struggles to detect abnormal oil levels promptly, making it impossible to monitor the transformer's operating status effectively and timely. If an abnormality such as excessively high or low oil levels occurs, it could lead to serious safety accidents and threaten the stable operation of the power system. Utility Model Content
[0004] To overcome the shortcomings of existing technologies, the purpose of this utility model is to provide a transformer oil level monitoring device, which solves the following technical problems: how to improve the monitoring accuracy and real-time monitoring capability of transformer oil level, and ensure the stability and reliability of transformer operation.
[0005] To address the problems in the existing technology, the technical solution of this utility model is as follows:
[0006] A transformer oil level monitoring device includes a seamless tube, a pressure probe, a ball valve, a protective shell, a sealing cover, a connecting frame, curved rods, and an adjusting rod. The seamless tube has a pressure probe installed at the top for monitoring real-time pressure, a ball valve for discharging transformer oil at the bottom, a protective shell covering the ball valve, a sealing cover below the protective shell, and curved rods symmetrically arranged on the outside of the protective shell. The bottom of the curved rods is fixedly connected to the sealing cover via the connecting frame, and an adjusting rod is fixedly connected between the curved rods.
[0007] Preferably, one end of the seamless tube is provided with a flange. The flange connection can ensure a tight fit between the seamless tube and the transformer tank, preventing transformer oil leakage at the connection point.
[0008] Preferably, a movable ring is fixedly connected to the outside of the connecting frame, and the movable ring is slidably connected to the outside of the protective shell. The movable ring serves as a transition component between the connecting frame and the protective shell, improving the stability and smoothness of the sealing cover during its up-and-down movement.
[0009] Preferably, the top of the sealing cover is provided with an elliptical protrusion. When the transformer oil is discharged from the ball valve, the elliptical protrusion can guide the oil flow in a specific direction, preventing the oil from accumulating on the sealing cover or leaking into the surrounding environment.
[0010] Preferably, the top of the protective shell is symmetrically threaded with wing bolts. By rotating the wing bolts, the protective shell can be clamped or loosened, thereby ensuring a tight fit between the protective shell and the ball valve.
[0011] Preferably, the protective shell has an embedding groove on one side, and the top of the embedding groove is open. The embedding groove can be tightly fitted onto the valve stem of the ball valve to achieve a stable connection between the protective shell and the ball valve.
[0012] Preferably, the top two sides of the embedding groove are provided with rounded chamfers. The rounded chamfers can make the opening edge of the embedding groove smoother, which facilitates the smooth cooperation between the protective shell and the ball valve.
[0013] Compared with the prior art, the advantages of this utility model are as follows:
[0014] This invention uses the pressure difference obtained from two pressure probes at high and low positions, combined with the pressure calculation formula P=ρgh, to accurately calculate the height of the transformer oil level. The measurement error is controlled within ±5cm, realizing real-time monitoring and high-precision measurement of the transformer oil level, thereby improving the transformer's operating efficiency and safety.
[0015] The protective shell and sealing cover together form a sealed environment when the valve is closed, effectively preventing dust, moisture and other impurities from entering the ball valve, ensuring the normal operation and long service life of the ball valve. This dual protection design not only improves the reliability of the equipment, but also reduces the failure rate caused by impurities entering. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0017] Figure 2 This is a schematic diagram of the seamless tube structure of this utility model;
[0018] Figure 3 This is a schematic diagram of the protective shell structure of this utility model;
[0019] Figure 4 This is a schematic diagram of the sealing cap structure of this utility model.
[0020] Reference numerals: 1. Seamless pipe; 2. Pressure probe; 3. Ball valve; 4. Protective shell; 5. Sealing cap; 6. Connecting frame; 7. Curved rod; 8. Adjusting rod; 9. Flange; 10. Moving ring; 11. Elliptical protrusion; 12. Butterfly bolt; 13. Embedded groove. 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 of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0022] The transformer oil level monitoring device has a seamless pipe 1, a pressure probe 2, a ball valve 3, a protective shell 4, a sealing cover 5, a connecting frame 6, a curved rod 7, and an adjusting rod 8;
[0023] like Figures 1 to 4 As shown, a pressure probe 2 for monitoring real-time pressure is installed on the top of the seamless tube 1, and a ball valve 3 for discharging transformer oil is provided at the bottom of the seamless tube 1. A protective shell 4 is fitted on the outside of the ball valve 3, and a sealing cover 5 is provided below the protective shell 4. Curved rods 7 are symmetrically arranged on the outside of the protective shell 4. The bottom of the curved rods 7 is fixedly connected to the sealing cover 5 through a connecting bracket 6. An adjusting rod 8 is fixedly connected between the curved rods 7.
[0024] Two sets of liquid level monitoring fixtures are required, one for the low position of the transformer and the other for the high position. Both sets of fixtures are connected to the same control cabinet. The principle of measuring liquid level is based on the pressure calculation formula P=ρgh, where: P is pressure, ρ is liquid density, g is gravitational acceleration, and h is liquid height.
[0025] Since the inside of the transformer tank is a vacuum, pressure probe 2 needs to be able to monitor both positive and negative pressure. By using the pressure difference obtained from the two pressure probes 2 (high and low positions), we can calculate the liquid level height. The specific calculation formula is as follows:
[0026] ΔP = Phigh - Plow = ρg(hhigh - hlow)
[0027] Since h_high and h_low are the differences between the required liquid level and the reference height, and we know ΔP, ρ, and g, we can solve for h_high - h_low. If we know one of the reference heights, such as the height of the low level, we can obtain the real-time liquid level. The measurement error is generally ±5cm. Through the above principles and formulas, we can obtain the real-time liquid level of the transformer oil.
[0028] The sealing cover 5 is designed to seal the protective shell 4 when the ball valve 3 is closed, forming a sealed environment together with the protective shell 4, effectively preventing dust, moisture and other impurities from entering the ball valve 3, ensuring the normal operation and long service life of the ball valve 3;
[0029] When the valve stem is turned to close the ball valve 3, the handle part of the valve stem will rotate accordingly. This rotation will push the adjusting rod 8 to rise. The adjusting rod 8 is fixedly connected to the sealing cover 5 through the connecting bracket 6. Therefore, the rise of the adjusting rod 8 will drive the sealing cover 5 to rise together. When the sealing cover 5 is attached to the protective shell 4, a sealed environment is formed.
[0030] like Figures 1 to 4 As shown, a flange 9 is provided at one end of the seamless tube 1, and the seamless tube 1 is installed on the transformer through the flange 9.
[0031] like Figures 1 to 4 As shown, a movable ring 10 is fixedly connected to the outside of the connecting frame 6. The movable ring 10 is slidably connected to the outside of the protective shell 4, so that the curved rod 7 and the sealing cover 5 move more smoothly and steadily up and down.
[0032] like Figures 1 to 4 As shown, the top of the sealing cover 5 is provided with an elliptical protrusion 11. The elliptical protrusion 11 is used to guide the flow direction of the transformer oil discharged from the ball valve 3. When the transformer oil is discharged from the ball valve 3, the elliptical protrusion 11 can guide the oil flow along a specific direction to prevent the transformer oil from accumulating on the sealing cover 5 or leaking into the surrounding environment.
[0033] like Figures 1 to 4 As shown, the top of the protective shell 4 is symmetrically threaded with wing bolts 12. The wing bolts 12 are used for tightening. By rotating the wing bolts 12, the tightness between the protective shell 4 and the ball valve 3 can be adjusted to ensure that the protective shell 4 is more firmly fixed.
[0034] like Figures 1 to 4 As shown, an embedding groove 13 is provided on one side of the protective shell 4. The top of the embedding groove 13 is open. The embedding groove 13 corresponds to the valve stem of the ball valve 3. When the protective shell 4 is put on, the embedding groove 13 can fit tightly on the valve stem to achieve installation and positioning.
[0035] like Figures 1 to 4 As shown, the top two sides of the embedding groove 13 are provided with rounded chamfers, making it easier for the embedding groove 13 to fit onto the outside of the valve stem of the ball valve 3 during installation.
[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A transformer oil level monitoring device, characterized in that, include: Seamless tube (1), pressure probe (2), ball valve (3), protective shell (4), sealing cover (5), connecting frame (6), curved rod (7) and adjusting rod (8). The top of the seamless tube (1) is equipped with a pressure probe (2) for monitoring real-time pressure. The bottom of the seamless tube (1) is equipped with a ball valve (3) for discharging transformer oil. The ball valve (3) is covered with a protective shell (4). The protective shell (4) is located below the protective shell (4). Curved rods (7) are symmetrically arranged on the outside of the protective shell (4). The bottom of the curved rods (7) is fixedly connected to the sealing cover (5) through the connecting frame (6). Adjusting rods (8) are fixedly connected between the curved rods (7).
2. The transformer oil level monitoring device according to claim 1, characterized in that, The seamless tube (1) has a flange (9) at one end.
3. The transformer oil level monitoring device according to claim 1, characterized in that, The connecting frame (6) is fixedly connected to a movable ring (10) on the outside, and the movable ring (10) is slidably connected to the outside of the protective shell (4).
4. The transformer oil level monitoring device according to claim 1, characterized in that, The sealing cap (5) has an elliptical protrusion (11) on its top.
5. The transformer oil level monitoring device according to claim 1, characterized in that, The protective shell (4) has symmetrical threaded connections of butterfly bolts (12) on its top.
6. The transformer oil level monitoring device according to claim 1, characterized in that, The protective shell (4) has an embedding groove (13) on one side, and the top of the embedding groove (13) is open.
7. The transformer oil level monitoring device according to claim 6, characterized in that, The top two sides of the embedding groove (13) are provided with rounded chamfers.