Transformer oil degassing mechanism, degassing device and on-line transformer oil detector
Through the magnetic induction-driven stirrer rapid degassing and buffering and return mechanism of the oil discharge chamber, the problems of low degassing efficiency and reduced oil volume in the prior art are solved, and efficient degassing and oil management are achieved. in various detection scenarios.
Patent Information
- Application Number
- CN202420272327.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-04
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2034-02-04
AI Technical Summary
The existing transformer oil degassing method is inefficient and complex in structure, and the oil sample not sent back after inspection will affect the normal operation of the transformer.
A degassing chamber and oil discharge mechanism including magnetic induction stirrer are designed. The stirrer is quickly degassed by magnetic induction, and the oil is cached and returned through the oil discharge chamber to ensure the management of oil quality and oil volume in the transformer. .
It improves the degassing efficiency, avoids the problems of oil leakage and oil volume reduction, is suitable for inspection in various scenarios, and ensures the quality of transformer oil and the normal operation of equipment.
Smart Images
Figure CN222144945U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of transformer oil detection equipment, in particular to a transformer oil degassing mechanism, a degassing device and a transformer oil online detector. Background Art
[0002] As an important equipment in the power system, it is particularly important to detect the status of the transformer. The status of the transformer can be judged by detecting the content of dissolved gas in the transformer oil. The commonly used method is gas chromatography detection.
[0003] When gas chromatography is used for detection, the transformer oil must first be degassed. Existing degassing methods include oscillation degassing, vacuum degassing, etc. Existing oscillation degassing and vacuum degassing methods are both inefficient and have a complex degassing structure.
[0004] In addition, when testing, the transformer oil testing instrument extracts a certain amount of transformer insulating oil from the transformer. After the test is completed, if the oil sample is not returned to the transformer, the content of insulating oil inside the transformer will be reduced. If the number of tests is large, it may affect the normal operation of the transformer oil. Utility Model Content
[0005] The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a transformer oil degassing mechanism, a degassing device and a transformer oil online detector.
[0006] In order to solve the above technical problems, the utility model provides the following technical solutions:
[0007] A transformer oil degassing mechanism comprises a degassing cavity, a magnetic induction stirrer is rotatably connected to the inner side of the bottom of the degassing cavity, a magnet is arranged on the outer side of the bottom of the degassing cavity, the magnet is fixedly connected to the output shaft of a motor, the motor is fixedly arranged relative to the degassing cavity, the motor drives the magnet to rotate, the magnetic induction stirrer can rotate synchronously with the magnet, the stirrer rotates relative to the degassing cavity, thereby quickly stirring the transformer oil in the degassing cavity, and stirring and removing the gas in the oil;
[0008] The top of the degassing cavity is provided with an outlet pipe for delivering the degassing gas;
[0009] The two sides of the degassing cavity are respectively connected to an oil inlet pipe and an oil outlet pipe for feeding in or out transformer oil.
[0010] An L-shaped limit plate is arranged in the degassing chamber, the vertical plate of the limit plate is fixedly connected to the degassing chamber, the horizontal plate of the limit plate is arranged on the upper part of the stirrer, and the top of the stirrer is a spherical structure. The limit plate is used to limit the position of the stirrer to prevent it from moving upward, and its top is arranged as a spherical surface to avoid generating a large friction force between the limit plate and the stirrer to affect the rotation speed.
[0011] A transformer oil degassing device comprises a casing, wherein a degassing mechanism and an oil draining mechanism are arranged in the casing.
[0012] The degassing mechanism includes a degassing cavity, a magnetic induction stirrer is rotatably connected to the inner side of the bottom of the degassing cavity, a magnet is arranged on the outer side of the bottom of the degassing cavity, the magnet is fixedly connected to the motor, the motor is fixedly arranged relative to the degassing cavity, an air outlet pipe is arranged on the top of the degassing cavity, and the two sides of the degassing cavity are respectively connected to the oil inlet pipe and the oil outlet pipe.
[0013] An L-shaped limiting plate is arranged in the degassing chamber, a horizontal plate of the limiting plate is arranged on the upper part of the stirring rod, and the top end of the stirring rod is a spherical structure.
[0014] The oil discharge mechanism comprises an oil discharge cavity, the top of which is connected to a first oil inlet pipe, which is connected to the degassing mechanism through a pipeline and is used to receive the degassed transformer oil;
[0015] The bottom of the oil drain cavity is connected to a first oil drain pipe, which is connected to a temporary storage cavity, which is connected to a pumping mechanism, and which is connected to an oil return pipe. The transformer oil in the oil drain cavity is pumped into the temporary storage cavity by the pumping mechanism, the valve of the first oil drain pipe is closed, and the transformer oil in the temporary storage cavity is sent back to the transformer through the oil return pipe by the pumping mechanism.
[0016] Specifically, the extraction and release mechanism includes a piston, which is slidably arranged inside the temporary storage chamber, and one end of the piston is connected to a linear power mechanism, which is used to drive the piston to move linearly, thereby performing extraction and release actions.
[0017] A liquid level sensor is arranged in the oil drain cavity to monitor the liquid level height inside the oil drain cavity to avoid excessive transformer oil being stored in the oil drain cavity.
[0018] The top of the oil drain cavity is connected to a second oil inlet pipe, which is connected to a flushing oil pipeline. To avoid contamination and affect the test results, the pipeline is usually flushed with the current oil sample after the last work, and the flushed oil flows from the flushing oil pipeline to the oil drain cavity;
[0019] In order to avoid negative pressure inside the oil discharge cavity and cooperate with the suction action of the temporary storage cavity, the top of the oil discharge cavity is connected to a normally open pipe, which is connected to the atmosphere;
[0020] In some cases, the degassed oil is no longer sent back to the transformer, or the transformer cannot be sent out because it is not on site, and the oil needs to be collected. Therefore, a second oil drain pipe is connected to the bottom of the oil drain cavity, and a plug is set at the end of the second oil drain pipe. The plug is opened and the oil is discharged and collected through the second oil drain pipe.
[0021] A transformer oil online detector comprises a shell, wherein the transformer oil degassing device is arranged inside the shell, and a gas chromatography device is also arranged inside the shell. The transformer oil degassing device and the gas chromatography device are both independent modules, which are convenient for maintenance and replacement.
[0022] The beneficial effects achieved by the utility model are:
[0023] 1. The degassing mechanism of the utility model has a novel structure, degassing by stirring, with high degassing efficiency, and adopts magnetic induction driving mode to avoid opening holes at the bottom of the degassing cavity and avoid transformer oil leakage;
[0024] 2. Due to high-speed stirring, some bubbles are generated in the degassed transformer oil. The utility model adopts an oil discharge cavity to cache the degassed transformer oil for a period of time to eliminate the bubbles and gradually restore the crude oil, thereby ensuring that the oil returned to the transformer is of better quality;
[0025] Moreover, the oil discharge mechanism of the utility model can adapt to the needs of various scenarios. Specifically, the oil in the oil discharge cavity can be directly discharged and collected, and can also be sent back to the transformer to continue working, making the utility model suitable for various scenarios such as laboratory testing and on-site testing.
[0026] 3. The online detector of the utility model is an integrated structure, which is convenient to carry and use for online detection, and the internal structure is modular, which is convenient for maintenance and assembly. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:
[0028] Figure 1 It is a structural schematic diagram of the utility model transformer oil degassing device;
[0029] Figure 2 It is a schematic diagram of the internal structure of the utility model transformer oil degassing device;
[0030] Figure 3 It is a structural schematic diagram (cut away) of the utility model transformer oil degassing mechanism;
[0031] Figure 4It is a partial structural schematic diagram of the transformer oil degassing mechanism of the utility model;
[0032] Figure 5 The utility model is a schematic diagram of the internal structure of an online transformer oil detector.
[0033] In the figure: 1. casing; 21. degassing chamber; 22. oil inlet pipe; 23. oil outlet pipe; 24. motor; 25. stirring rod; 26. magnet; 27. limit plate; 28. outlet pipe; 31. normally open pipe; 32. first oil inlet pipe; 33. second oil inlet pipe; 34. liquid level sensor; 35. oil drain chamber; 36. second oil drain pipe; 37. first oil drain pipe; 38. linear power mechanism; 39. temporary storage chamber; 310. oil return pipe; 100. degassing device; 200. gas chromatography device; 300. gas generator; 400. casing. DETAILED DESCRIPTION
[0034] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.
[0035] Example:
[0036] like Figure 2-Figure 4 As shown, a transformer oil degassing mechanism includes a degassing cavity 21, which is a closed hollow cylindrical structure; an outlet pipe 28 is arranged on the top of the degassing cavity 21 to send out the degassing gas; the two sides of the degassing cavity 21 are respectively connected to an oil inlet pipe 22 and an oil outlet pipe 23 to send in or out the transformer oil.
[0037] The inner side of the bottom of the degassing chamber 21 is rotatably connected with a magnetic induction stirrer 25 through a rotating shaft, and the stirrer 25 is an impeller structure and is provided with a plurality of stirring blades. A magnet 26 is provided on the outer side of the bottom of the degassing chamber 21, and the magnet 26 is fixedly connected to the output shaft of the motor 24. The motor 24 is fixedly arranged relative to the degassing chamber 21, and the motor 24 drives the magnet 26 to rotate. A magnetic structure that can be magnetically coupled with the magnet 26, such as a magnet structure, is provided in the stirrer 25, so that the stirrer 25 can rotate synchronously with the magnet 26, and the stirrer 25 rotates relative to the degassing chamber 21, thereby quickly stirring the transformer oil in the degassing chamber 21, and stirring and removing the gas in the oil.
[0038] An L-shaped limit plate 27 is fixedly arranged in the degassing chamber 21, the vertical plate of the limit plate 27 is fixedly connected to the side wall of the degassing chamber 21, and the horizontal plate of the limit plate 27 is arranged on the upper part of the stirrer 25, and the top of the stirrer 25 is a spherical structure. The limit plate 27 is used to limit the position of the stirrer 25 to prevent it from moving upward, and the top of the stirrer 25 is set to a spherical surface to avoid a large friction between the limit plate 27 and the stirrer.
[0039] like Figure 1-Figure 4 As shown, a transformer oil degassing device comprises a casing 1, in which a degassing mechanism and an oil draining mechanism are arranged.
[0040] The degassing mechanism adopts the above-mentioned transformer oil degassing mechanism.
[0041] The oil discharge mechanism comprises an oil discharge cavity 35 , the top of which is connected to a first oil inlet pipe 32 , which is connected to the oil outlet pipe 23 of the degassing mechanism through a pipeline for receiving the degassed transformer oil.
[0042] The bottom of the oil drain cavity 35 is connected to a first oil drain pipe 37, which is connected to a temporary storage cavity 39, which is connected to a pumping mechanism, and which is connected to an oil return pipe 310. The transformer oil in the oil drain cavity 35 is pumped into the temporary storage cavity 39 by the pumping mechanism, and the valve of the first oil drain pipe 37 is closed, and the transformer oil in the temporary storage cavity 39 is sent back to the transformer through the oil return pipe 310 by the pumping mechanism.
[0043] Specifically, the pumping mechanism includes a piston, which is slidably arranged inside the temporary storage chamber 39 and is not shown in the drawings. One end of the piston is connected to a linear power mechanism 38, which is used to drive the piston to move linearly. The linear power mechanism 38 can use a linear motor.
[0044] The oil drain cavity 35 is provided with a liquid level sensor 34 for monitoring the liquid level inside the oil drain cavity 35 to prevent excessive transformer oil from being stored in the oil drain cavity 35. Two liquid level sensors 34 are provided at different heights.
[0045] The top of the oil drain cavity 35 is connected to a second oil inlet pipe 33, which is connected to a flushing oil pipeline. To avoid contamination that affects the test results, the pipeline is usually flushed with the current oil sample after the last work. The flushed oil flows from the flushing oil pipeline to the oil drain cavity 35 and is then sent out from the oil drain cavity 35.
[0046] In order to avoid negative pressure in the oil discharge cavity 35 and cooperate with the suction action of the temporary storage cavity 39, the top of the oil discharge cavity 35 is connected to a normally open pipe 31, which is connected to the atmosphere.
[0047] In some cases, the degassed oil is no longer sent back to the transformer, or the transformer cannot be sent out because it is not on site, and the oil needs to be collected. Therefore, the bottom of the oil drain cavity 35 is connected to a second oil drain pipe 36, and a plug is set at the end of the second oil drain pipe 36. The plug is opened to drain and collect the oil through the second oil drain pipe 36. The second oil drain pipe 36 extends to the outside of the casing 1, and the plug is set outside the casing 1.
[0048] like Figure 5 As shown, a transformer oil online detector includes a housing 400, in which a degassing device 100, a gas chromatograph 200 and a gas generator 300 are arranged. The degassing device 100 adopts the above transformer oil degassing device, and the degassing device 100, the gas chromatograph 200 and the gas generator 300 are all independent module structures. The gas generator 300 is used to produce the auxiliary gas required by the gas chromatograph 200.
[0049] The pipelines described in the utility model can be provided with electric control valves to facilitate the on-off control thereof.
Claims
1. A transformer oil degassing mechanism, characterized in that: The invention comprises a degassing chamber (21), wherein a magnetic induction stirrer (25) is rotatably connected to the inner side of the bottom of the degassing chamber (21), a magnet (26) is arranged on the outer side of the bottom of the degassing chamber (21), the magnet (26) is fixedly connected to the output shaft of a motor (24), the motor (24) is fixedly arranged relative to the degassing chamber (21), an air outlet pipe (28) is arranged on the top of the degassing chamber (21), and the two sides of the degassing chamber (21) are respectively connected to an oil inlet pipe (22) and an oil outlet pipe (23).
2. The transformer oil degassing mechanism according to claim 1, characterized in that: An L-shaped limiting plate (27) is arranged in the degassing cavity (21), and a horizontal plate of the limiting plate (27) is arranged on the upper part of the stirring element (25). The top end of the stirring element (25) is a spherical structure.
3. A transformer oil degassing device, characterized in that: It comprises a casing (1), in which a degassing mechanism and an oil discharge mechanism are arranged; The degassing mechanism comprises a degassing chamber (21), a magnetic induction stirrer (25) is rotatably connected to the inner side of the bottom of the degassing chamber (21), a magnet (26) is arranged on the outer side of the bottom of the degassing chamber (21), the magnet (26) is fixedly connected to a motor (24), the motor (24) is fixedly arranged relative to the degassing chamber (21), an air outlet pipe (28) is arranged on the top of the degassing chamber (21), and the two sides of the degassing chamber (21) are respectively connected to an oil inlet pipe (22) and an oil outlet pipe (23).
4. The transformer oil degassing device according to claim 3, characterized in that: An L-shaped limiting plate (27) is arranged in the degassing cavity (21), and a horizontal plate of the limiting plate (27) is arranged on the upper part of the stirring element (25). The top end of the stirring element (25) is a spherical structure.
5. The transformer oil degassing device according to claim 3, characterized in that: The oil discharge mechanism comprises an oil discharge cavity (35), the top of the oil discharge cavity (35) is connected to a first oil inlet pipe (32), the first oil inlet pipe (32) is connected to a degassing mechanism through a pipeline, the bottom of the oil discharge cavity (35) is connected to a first oil discharge pipe (37), the first oil discharge pipe (37) is connected to a temporary storage cavity (39), the temporary storage cavity (39) is connected to the pumping mechanism, and the temporary storage cavity (39) is connected to an oil return pipe (310).
6. The transformer oil degassing device according to claim 5, characterized in that: The pumping mechanism comprises a piston which is slidably arranged inside the temporary storage chamber (39), and one end of the piston is connected to the linear power mechanism (38).
7. The transformer oil degassing device according to claim 5, characterized in that: A liquid level sensor (34) is arranged in the oil discharge cavity (35).
8. The transformer oil degassing device according to claim 5, characterized in that: The top of the oil drain cavity (35) is connected to a second oil inlet pipe (33), which is connected to a flushing oil pipeline. The top of the oil drain cavity (35) is connected to a normally open pipeline (31), which is connected to the atmosphere. The bottom of the oil drain cavity (35) is connected to a second oil drain pipe (36), and a plug is arranged at the end of the second oil drain pipe (36).
9. A transformer oil online detector, characterized in that: The invention comprises a shell (400), wherein a transformer oil degassing device as claimed in any one of claims 3 to 8 is arranged in the shell (400), and a gas chromatography device (200) is also arranged in the shell (400).