Oil pillow for transformer
By setting pipe 1 and pipe 2 in the transformer oil pillow, as well as check valve 1 and check valve 2, the problem of oil cannot be recycled in the prior art is solved, and the full utilization of oil and the extension of the use cycle is achieved.
Patent Information
- Application Number
- CN202421486145.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-27
- Publication Date
- 2025-04-04
- Estimated Expiration
- 2034-06-27
AI Technical Summary
Due to the cylindrical cross-mounted installation and the single oil pipeline, the oil cannot circulate and enter the transformer body alternately, resulting in the oil being unable to fully utilize.
An oil pillow for transformer is designed, including a cylindrical oil tank installed transversely, equipped with pipeline one and pipeline two, as well as a one-way valve one and a one-way valve two. The pipeline one and pipeline two are respectively close to the two opposite sides of the oil tank to ensure that the oil circulation alternates into the transformer body.
Through this design, the oil in the oil pillow can be circulated and alternately entered the transformer body, ensuring full utilization of the oil and extending the use cycle of the oil.
Smart Images
Figure CN222720182U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of transformer oil pillows, in particular to an oil pillow for transformers. Background Art
[0002] The oil-immersed transformer body uses cooling oil to dissipate heat inside the transformer body. Corrugated heat sinks are provided on the side walls of the transformer body. When the inside of the transformer body is hotter, the heat is transferred to the oil inside the transformer body. The oil inside the transformer body rises as the temperature rises. The rising oil enters the inside of the corrugated heat sink for heat dissipation. The oil after heat dissipation inside the corrugated heat sink enters the lower part of the internal cavity of the transformer body to continue cooling the transformer body.
[0003] Since the oil inside the transformer body will expand when heated, it is necessary to install an oil pillow on the outside of the transformer body to adapt to the volume change of the hydraulic oil inside the transformer body. The oil pillow is connected to the inside of the transformer body through an oil pipeline. When the oil inside the transformer body expands due to heat, the oil inside the transformer body enters the oil pillow. When the oil inside the transformer body cools down and its volume recovers, the oil in the oil pillow flows back to the inside of the transformer body. In order to ensure that there is sufficient oil inside the transformer body, a large amount of oil is also stored in the oil pillow.
[0004] The problem with the prior art is that since most of the existing oil pillows are cylindrical and installed horizontally above the transformer body, and the oil pillow and the transformer body are connected by only one oil pipeline, the oil in the oil pillow cannot circulate and alternately enter the interior of the transformer body, resulting in the oil in the oil pillow cannot be fully utilized. Utility Model Content
[0005] The utility model provides an oil pillow for a transformer, which can make the oil in the oil pillow circulate and alternately enter the inside of the transformer body, so that the oil can be fully utilized.
[0006] The technical problem solved by the utility model is achieved by the following technical solutions:
[0007] A transformer oil pillow comprises a cylindrical oil tank horizontally mounted on a transformer body, the oil tank being provided with a first pipeline connected to the sealed interior of the transformer body, the first pipeline being provided with a first check valve for controlling the one-way flow of oil in the transformer body into the oil tank, the oil tank being further provided with a second pipeline connected to the interior of the transformer body, the second pipeline being provided with a second check valve for controlling the one-way flow of oil in the oil tank into the transformer body, the first pipeline and the second pipeline being respectively arranged close to two opposite sides of the oil tank.
[0008] Preferably, the end of the pipe 1 extending into the oil tank is higher than the end of the pipe 2 extending into the oil tank.
[0009] Preferably, one end of the pipe 1 extending into the interior of the transformer body is used to communicate with the upper portion of the internal cavity of the transformer body, and one end of the pipe 2 extending into the interior of the transformer body is used to communicate with the lower portion of the internal cavity of the transformer body.
[0010] Preferably, one end of the pipe 1 extending into the interior of the transformer body and one end of the pipe 2 extending into the interior of the transformer body are respectively arranged close to two opposite sides of the transformer body.
[0011] Preferably, a baffle is fixedly connected inside the oil tank to prevent the oil sprayed from pipeline 1 from escaping directly toward pipeline 2.
[0012] Preferably, the baffle is arranged near one end of pipeline one extending to the inside of the oil tank, and the baffle includes a vertical shielding portion and an inclined guide portion, the vertical shielding portion is located between pipeline one and pipeline two, and the inclined guide portion is used to guide the oil flowing out of pipeline one in a direction away from pipeline two.
[0013] The beneficial effect of the utility model is that by arranging pipeline 1, pipeline 2, one-way valve 1 and one-way valve 2, and pipeline 1 and pipeline 2 are arranged on two opposite sides close to the oil tank, the oil in the oil pillow can be circulated and alternately enter the interior of the transformer body, ensuring that the oil in the oil pillow can be fully utilized. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] In order to more clearly illustrate the implementation scheme of the utility model or the technical scheme in the prior art, the drawings required for use in the implementation scheme or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some implementation schemes of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.
[0015] Figure 1 This is a schematic diagram of the prior art structure of the utility model:
[0016] Figure 2 It is a cross-sectional view of the prior art of the utility model;
[0017] Figure 3 It is a perspective view of the prior art of the utility model;
[0018] Figure 4 It is a structural schematic diagram of the utility model;
[0019] Figure 5 is a perspective view of the utility model;
[0020] Figure 6 This is a front perspective view of the utility model;
[0021] Figure 7 It is a cross-sectional view of the utility model;
[0022] Figure 8 The utility model is a structural schematic diagram with a baffle added.
[0023] In the figure, 1. transformer; 2. oil tank; 3. capsule; 4. connecting pipe; 5. respirator; 6. pipe one; 7. one-way valve one; 8. pipe two; 9. one-way valve two; 10. baffle; 1001. vertical shielding part; 1002. inclined guide part. DETAILED DESCRIPTION
[0024] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below with reference to specific illustrations.
[0025] refer to Figure 1 , Figure 2 and Figure 3, is a schematic diagram of the prior art structure of the utility model. The transformer oil pillow includes a cylindrical oil tank 2, which is horizontally installed above the transformer body 1. The oil tank 2 is connected to the sealed transformer body 1 through a pipe 6. When the internal oil of the transformer body 1 expands due to heat, the oil flows into the inside of the oil tank 2. When the temperature of the oil inside the transformer body 1 drops, the oil flows back from the oil tank 2 to the transformer body 1. The existing oil pillows using the cylindrical oil tank 2 include capsule 3 type oil pillows and diaphragm type oil pillows. The capsule 3 type oil pillow is used as an example in the attached drawings of the utility model. The interior of the cylindrical oil tank 2 is provided with a capsule 3, and the capsule 3 is connected to the external atmosphere through a connecting pipe 4. The connecting end of the connecting pipe 4 and the external atmosphere is provided with a respirator 5, and the respirator 5 is used to remove moisture in the atmosphere (it is an existing structure, and the utility model also improves it, so it will not be elaborated on here). When the transformer body After the oil in the oil tank 1 enters the oil tank 2, the volume of the oil in the oil tank 2 increases, the pressure of the oil outside the capsule 3 is greater than the atmospheric pressure inside the capsule 3, and the oil squeezes the capsule 3, so that the air inside the capsule 3 is discharged from the respirator 5 at one end of the connecting pipe 4. When the temperature of the oil in the transformer body 1 gradually decreases, the volume of the oil in the oil tank 2 decreases, the pressure of the oil outside the capsule 3 is less than the pressure inside the capsule 3, the capsule 3 expands, and the external air enters the capsule 3 from the respirator 5 through the connecting pipe 4. It can be seen that the capsule 3 oil pillow realizes the mutual isolation of the oil and the atmosphere through the capsule 3, while the diaphragm oil pillow realizes the isolation of the oil and the atmosphere through the diaphragm that can float up and down inside the oil tank 2, and the oil tank 2 of the diaphragm oil pillow is a cylindrical shape with a polygonal cross section, so that the diaphragm can float up and down to a certain extent inside the oil tank 2. The above is an introduction to the existing transformer oil pillow of the utility model.
[0026] The above transformer oil pillow has the following defects: Figure 3 When the oil in the transformer body 1 heats up and expands in volume, the oil in the transformer body 1 enters the oil tank 2 through the pipe 16. The diffusion flow path of the oil entering the oil tank 2 from the pipe 16 in the oil tank 2 is as follows: Figure 3 As shown by the arrow A1 in the figure, the temperature of the oil inside the transformer body 1 changes gradually, so the volume also expands gradually. When the oil enters the oil tank 2 by the power of volume expansion, its kinetic energy is small, so its diffusion range is small. It should gradually diffuse near the end of the pipe 6 extending to the oil tank 2. If the pipe 6 is installed in the following manner: Figure 3 The central position of the bottom of the tank body, the oil entering the oil tank 2 from the pipeline 16 is diffused in the central position of the oil tank 2, and the central position area is adjacent to the Figure 3In the figure, it is marked as B1. When the oil in the transformer body 1 cools down, the oil in the oil tank 2 flows back to the transformer body 1 through the pipe 16. The oil near the pipe 16 and located in the center of the oil tank 2 is most likely to flow back to the inside of the transformer body 1, rather than the area in the center of the oil tank 2. Figure 3 Marked as B2, it always remains in the oil tank 2, so the oil in the oil tank 2 cannot be fully recycled. At the same time, since part of the oil in the oil tank 2 does not participate in the circulation, it only relies on the oil in the transformer body 1 for cooling, and the overall service life of the oil is also short. Based on the above situation, it is necessary to design an oil pillow for transformers to solve the above problems.
[0027] In view of the defects of the above-mentioned existing transformer oil pillow, the utility model makes the following improvements to the existing transformer oil pillow: Figure 4 and Figure 5 As shown, firstly, the existing pipeline 16 is retained to realize the communication between the oil tank 2 and the inside of the transformer body 1, and then a pipeline 28 is added to realize the communication between the oil tank 2 and the inside of the transformer body 1, and a one-way valve 17 is arranged on the pipeline 16 for controlling the one-way flow of the oil inside the transformer body 1 to the inside of the oil tank 2, and a one-way valve 29 is arranged on the pipeline 28 for controlling the one-way flow of the oil inside the oil tank 2 to the inside of the transformer body 1, and the pipeline 16 and the pipeline 28 are respectively arranged near two opposite sides of the oil tank 2, so that the oil in the oil pillow can circulate into the inside of the transformer body 1. The specific flow process is that when the transformer body 1 The volume of the oil inside expands after heating up, and the oil inside the transformer body 1 flows from the pipe 16 through the one-way valve 17 to the inside of the oil tank 2, and diffuses near the end of the pipe 16 extending to the inside of the oil tank 2. When the oil inside the transformer body 1 cools down, the volume shrinks, and the oil in the oil tank 2 extending to one end of the oil tank 2 near the pipe 28 returns to the inside of the transformer body 1 through the pipe 28 and the one-way valve 29. Since the pipe 16 and the pipe 28 are respectively arranged on two opposite sides close to the oil tank 2, the distance between them is relatively large, and the flow direction is unidirectional, it can ensure that the oil inside the oil tank 2 fully circulates and alternately enters the inside of the transformer body 1.
[0028] Furthermore, since the oil inside the transformer body 1 expands due to heat and enters the oil tank 2, when the higher temperature oil enters the oil tank 2, it will gradually rise in the colder oil inside the oil tank 2. The end of the pipe 1 6 extending to the oil tank 2 is set to be higher than the end of the pipe 2 8 extending to the oil tank 2, which can further ensure that the oil inside the oil tank 2 gradually circulates alternately into the transformer body 1, that is, the oil inside the transformer body 1 expands due to heat and enters the oil tank 2 and gradually diffuses upward. When the oil temperature inside the transformer body 1 decreases, the oil at a lower position inside the oil tank 2 flows back through the pipe 2 8.
[0029] Furthermore, in order to ensure that the oil flowing back into the transformer body 1 can fully stay in the transformer body 1 for a long time, one end of the pipe 1 6 extending to the inside of the transformer body 1 is used to communicate with the upper part of the internal cavity of the transformer body 1, and one end of the pipe 2 8 extending to the inside of the transformer body 1 is used to communicate with the lower part of the internal cavity of the transformer body 1. Since the pipe 2 8 is connected with the lower part of the internal cavity of the transformer body 1, the oil flowing back from the pipe 2 8 to the transformer body 1 first escapes at the bottom of the transformer body 1, and after being heated, it can gradually rise to the end close to the pipe 1 6 extending to the inside of the transformer body 1, thereby ensuring that the oil entering the transformer body 1 from the oil tank 2 can be used and then flow back to the inside of the oil tank 2.
[0030] Furthermore, one end of pipeline 1 6 extending to the interior of the transformer body 1 and one end of pipeline 2 8 extending to the interior of the transformer body 1 are respectively arranged close to two opposite sides of the transformer body 1. The above arrangement can further fully ensure the relative distance between pipeline 1 6 and pipeline 2 8 extending to one end of the transformer body 1, ensuring that the oil will not flow back into the oil tank 2 in a short time.
[0031] Furthermore, in order to further ensure that the oil entering the oil tank 2 from the pipeline 1 6 will not escape in the direction of the pipeline 2 8 in a short time, the interior of the oil tank 2 is fixedly connected with a baffle 10 for preventing the oil sprayed from the pipeline 1 6 from directly escaping in the direction of the pipeline 2 8. The baffle 10 can make the oil inside the oil tank 2 and the oil inside the transformer body 1 alternately circulate better.
[0032] Furthermore, a baffle 10 is arranged near one end of the pipeline 16 extending to the inside of the oil tank 2, and the baffle 10 includes a vertical shielding portion 1001 and an inclined guiding portion 1002, wherein the vertical shielding portion 1001 is located between the pipeline 16 and the pipeline 28, and the inclined guiding portion 1002 is used to guide the oil flowing out of the pipeline 16 in a direction away from the pipeline 28, and the vertical shielding portion 1001 is used to reduce the diffusion of the oil flowing into the oil tank 2 from the pipeline 16 in the direction of the pipeline 28, and the inclined guiding portion 1002 is used to make the oil flowing into the oil tank 2 from the pipeline 16 flow in a direction away from the pipeline 28, thereby ensuring that the oil in the oil tank 2 can gradually enter the interior of the transformer body 1 as much as possible.
[0033] In summary, by providing pipeline 1 6 and pipeline 2 8, and installing one-way valve 1 7 on pipeline 1 6 and one-way valve 2 9 on pipeline 2 8, it can be fully ensured that the oil inside the oil tank 2 alternately enters the inside of the transformer body 1. Since the oil inside the oil tank 2 can alternately enter the inside of the transformer body 1, the oil inside the transformer body 1 is renewed, thereby increasing the service life of the oil and achieving full utilization of the oil.
[0034] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.
Claims
1. A transformer oil pillow, comprising a cylindrical oil tank (2) mounted horizontally on a transformer body (1), wherein a pipe (6) is provided on the oil tank (2) and communicates with the sealed interior of the transformer body (1), characterized in that: The first pipeline (6) is provided with a one-way valve (7) for controlling the one-way flow of oil in the transformer body (1) into the oil tank (2); the oil tank (2) is also provided with a second pipeline (8) for communicating with the interior of the transformer body (1); the second pipeline (8) is provided with a one-way valve (9) for controlling the one-way flow of oil in the oil tank (2) into the transformer body (1); the first pipeline (6) and the second pipeline (8) are respectively provided near two opposite sides of the oil tank (2).
2. The oil conservator for transformer according to claim 1, characterized in that: The end of the pipe 1 (6) extending into the interior of the oil tank (2) is higher than the end of the pipe 2 (8) extending into the interior of the oil tank (2).
3. The oil conservator for transformer according to claim 1 or 2, characterized in that: One end of the pipe 1 (6) extending into the interior of the transformer body (1) is used to communicate with the upper part of the internal cavity of the transformer body (1), and one end of the pipe 2 (8) extending into the interior of the transformer body (1) is used to communicate with the lower part of the internal cavity of the transformer body (1).
4. The transformer oil conservator according to claim 3, characterized in that: One end of the pipe 1 (6) extending into the interior of the transformer body (1) and one end of the pipe 2 (8) extending into the interior of the transformer body (1) are respectively arranged close to two opposite sides of the transformer body (1).
5. The oil conservator for transformer according to claim 1 or 2, characterized in that: A baffle (10) is fixedly connected inside the oil tank (2) and is used to prevent the oil sprayed from the first pipeline (6) from escaping directly in the direction of the second pipeline (8).
6. The transformer oil conservator according to claim 5, characterized in that: The baffle (10) is arranged near one end of the pipeline (6) extending to the inside of the oil tank (2), and the baffle (10) comprises a vertical shielding portion (1001) and an inclined guiding portion (1002), wherein the vertical shielding portion (1001) is located between the pipeline (6) and the pipeline (8), and the inclined guiding portion (1002) is used to guide the oil flowing out of the pipeline (6) in a direction away from the pipeline (8).