Exciting transformer of oil conservator
By designing an oil pillow excitation transformer, using the connecting pipe and pressure relief valve structure between the oil pillow and the box, the problem of oil seepage and heat dissipation poor in the working state of the excitation transformer is solved, and effective oil buffering and heat dissipation improvement is achieved.
Patent Information
- Application Number
- CN202421802331.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-29
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-07-29
AI Technical Summary
In the working state of the existing excitation transformer, the transformer oil in the box is easily increased, resulting in an increase in the pressure in the box, poor heat dissipation and easy oil leakage.
An oil pillow excitation transformer is designed, including a box body, a box cover, an oil pillow and a connecting pipe. The oil pillow is connected to the box body through a connecting pipe. A pressure relief valve is provided at the top, an oil drain port is provided at the bottom, a box body and a box cover are connected by bolts, and a sealing gasket is provided on the box cover. The oil pillow is connected to the box cover through a support plate to buffer and circulate transformer oil to prevent oil leakage and improve heat dissipation.
Effectively prevent the oil from spilling out of the transformer and improve the heat dissipation efficiency. Through the design of two-stage pressure relief valves and the circulation cooling of the oil pillow, the problems of oil seepage and heat dissipation are solved.
Smart Images
Figure CN223065961U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an oil conservator excitation transformer, belonging to the technical field of transformers. Background Art
[0002] An excitation transformer generally provides a three-phase AC excitation power supply device for the excitation system of a generator. The excitation system converts the three-phase power supply into the rotor DC power supply of the generator, forms the excitation magnetic field of the generator, and adjusts the thyristor trigger angle through the excitation system to achieve the purpose of adjusting the terminal voltage and reactive power of the motor;
[0003] For existing excitation transformers, the transformer oil in the box will rise during the working state, resulting in an increase in the pressure inside the box. On the one hand, the transformer oil has poor heat dissipation, and on the other hand, it is easy to leak oil from the box cover.
[0004] For existing excitation transformers, the transformer oil in the box will rise during the working state, resulting in an increase in the pressure inside the box. On the one hand, the transformer oil has poor heat dissipation, and on the other hand, it is easy to leak oil from the box cover. Summary of the Utility Model
[0005] The purpose of the utility model is to overcome the deficiencies in the prior art and provide an oil conservator excitation transformer to solve the problems of oil leakage and poor heat dissipation in the prior art.
[0006] To achieve the above object / to solve the above technical problems, the present invention is implemented by the following technical solutions:
[0007] An oil conservator excitation transformer includes:
[0008] A box body, in which a coil and transformer oil are provided. A box cover is provided on the top of the box body. A low-voltage bushing and a high-voltage bushing connected to the coil are provided on the box cover. A gasket is provided at the connection between the box cover and the box body;
[0009] An oil conservator is provided on the box cover. The oil conservator is communicated with the box body through a connecting pipe. A pressure relief valve I is provided at the top of the oil conservator, and an oil drain port is provided at the bottom.
[0010] Optionally, a pressure relief valve II is provided on the box body.
[0011] Optionally, the oil conservator is connected to the box cover through a support plate.
[0012] Optionally, the box body and the box cover are connected by bolts.
[0013] Optionally, at least two groups of high-voltage bushings are provided.
[0014] Optionally, at least four groups of low-voltage bushings are provided.
[0015] Optionally, a base is provided at the bottom of the box body, and an auxiliary fixing frame is provided at the bottom of the base.
[0016] Optionally, a grounding bolt is provided on the base.
[0017] Compared with the prior art, the beneficial effects achieved by the present utility model are as follows:
[0018] Compared with the traditional excitation transformer, the present utility model is designed with an oil conservator. When the transformer is working, when the oil pressure in the box rises, it can be temporarily buffered into the oil conservator along the connecting pipe. On the one hand, it prevents the transformer oil from overflowing outward, and on the other hand, it is beneficial to cooling after circulation through the oil conservator. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 is a schematic structural diagram of an oil conservator excitation transformer of the present utility model;
[0020] In the figure: 1. Base; 2. Box body; 3. Oil conservator; 4. Box cover; 5. Sealing gasket; 6. Low-voltage bushing; 7. High-voltage bushing; 8. Pressure relief valve II; 9. Oil drain port; 10. Connecting pipe; 11. Support plate; 12. Grounding bolt; 13. Auxiliary fixing frame; 14. Bolt; 15. Pressure relief valve I. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0021] The present utility model will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present utility model and cannot be used to limit the protection scope of the present utility model.
[0022] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.
[0023] As Figure 1 shown, the present utility model discloses an oil conservator excitation transformer, including:
[0024] A box body 2, within which a coil and transformer oil (not shown in the figure) are provided. A box cover 4 is provided at the top of the box body 2. The box body 2 and the box cover 4 are connected by bolts 14. A gasket 5 is provided at the connection between the box cover 4 and the box body 2. The gasket 5 is an O-ring seal, with high corrosion resistance and sealing performance.
[0025] On the box cover 4, there are a low-voltage bushing 6 and a high-voltage bushing 7 connected to the coil. At least two groups of high-voltage bushings 7 are provided, and at least four groups of low-voltage bushings 6 are provided, facilitating tests on various voltage equipment.
[0026] An oil conservator 3 is provided on the box cover 4. The oil conservator 3 is communicated with the box body 2 through a connecting pipe 10. A pressure relief valve 15 is provided at the top of the oil conservator 3, and an oil drain port 9 is provided at the bottom.
[0027] In this embodiment, the function of setting the oil conservator is that when the transformer is working, when the oil pressure in the box body rises, it can be temporarily cached in the oil conservator along the connecting pipe. On the one hand, it prevents the transformer oil from overflowing outward, and on the other hand, it is beneficial for cooling after circulation through the oil conservator.
[0028] As Figure 1 shown, a pressure relief valve 8 is provided on the box body 2, and a pressure relief valve 15 is provided at the top of the oil conservator 3. When the pressure in the box body 2 is high, it can relieve pressure in a timely manner, and the design of the two pressure relief valves can achieve two-stage pressure relief. First, the pressure is relieved from the box body, and then from the oil conservator, avoiding oil leakage problems caused by high pressure through two-stage pressure relief.
[0029] In this embodiment, to solve the heat dissipation problem, the oil conservator 3 is connected to the box cover 4 through a support plate 11, so that the oil conservator is not directly placed above the box body, maximizing heat dissipation.
[0030] To facilitate the hoisting, fixing, and handling of the transformer, a base 1 is provided at the bottom of the box body 2, and an auxiliary fixing frame 13 is provided at the bottom of the base 1.
[0031] In terms of safety, a grounding bolt 12 is provided on the base 1.
[0032] Compared with traditional excitation transformers, the present utility model designs an oil conservator. When the transformer is working, when the oil pressure in the box body rises, it can be temporarily cached in the oil conservator along the connecting pipe. On the one hand, it prevents the transformer oil from overflowing outward, and on the other hand, it is beneficial for cooling after circulation through the oil conservator.
[0033] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood through specific circumstances.
[0034] The above are only the preferred embodiments of the present utility model. It should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present utility model, several improvements and modifications can still be made, and these improvements and modifications should also be regarded as the protection scope of the present utility model.
Claims
1. An oil conservator excitation transformer, characterized in that, Including: A box body, in which a coil and transformer oil are provided. A box cover is provided on the top of the box body. A low-voltage bushing and a high-voltage bushing connected to the coil are provided on the box cover. A gasket is provided at the connection between the box cover and the box body. An oil conservator is provided on the box cover. The oil conservator is communicated with the box body through a connecting pipe. A first pressure relief valve is provided at the top of the oil conservator, and an oil drain port is provided at the bottom.
2. The conservator excitation transformer according to claim 1, characterized in that, A second pressure relief valve is provided on the box body.
3. The conservator excitation transformer according to claim 1, characterized in that, The oil conservator is connected to the box cover through a support plate.
4. The conservator excitation transformer according to claim 1, characterized in that The box body and the box cover are connected by bolts.
5. The conservator exciting transformer according to claim 1, characterized in that, At least two groups of high-voltage bushings are provided.
6. The conservator exciting transformer according to claim 1, characterized in that, At least four groups of low-voltage bushings are provided.
7. The conservator excitation transformer according to claim 1, characterized in that, A base is provided at the bottom of the box body, and an auxiliary fixing frame is provided at the bottom of the base.
8. The conservator excited transformer according to claim 7, wherein, A grounding bolt is provided on the base.