Oil tank of transformer
By designing oil inlet pipes, oil outlet pipes and spiral pipes in the transformer oil tank, combined with heat conductors and diaphragms, the problem of lack of heat dissipation of oil pillows is solved, and the temperature circulation of insulating oil inside the oil tank is reduced and the heat dissipation efficiency is improved.
Patent Information
- Application Number
- CN202422631966.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-30
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2034-10-30
AI Technical Summary
In the prior art, the oil pillow only provides a space for thermal expansion and contraction and lacks heat dissipation effect, which makes it difficult to effectively reduce the temperature of the insulating oil inside the transformer oil tank.
A transformer oil tank is designed. By setting the oil inlet and outlet pipes in the oil pillow, and installing heat conductors and diaphragms in the oil pillow, the circulating flow of insulating oil is achieved by using density differences, and combining with the spiral pipe to increase the flow path, the temperature adjustment and heat dissipation of the insulating oil inside the oil tank is achieved.
The temperature cycle of the insulating oil inside the oil tank is reduced, which enhances the heat dissipation effect, reduces the aging speed of the insulating oil, and improves the heat dissipation efficiency.
Smart Images
Figure CN223051971U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of transformer oil tanks, in particular to an oil tank of a transformer. Background Art
[0002] The oil tank of a transformer is an important part of the transformer. It is usually used to store insulating oil, provide insulation and cooling air for the iron core and winding of the transformer, and at the same time protect the iron core and winding to prevent foreign impurities and water molecules from entering the internal components of the transformer.
[0003] The transformer oil tank mainly consists of an oil tank, a tank cover, pipelines and an oil conservator. At the same time, the oil conservator is connected to the oil tank through an oil pipeline. When using the insulating oil inside the oil tank to dissipate heat from the iron core and winding, usually the insulating oil absorbs the heat on the iron core and winding. After the insulating oil is heated, it usually dissipates heat from the insulating oil inside the oil tank through the pipelines and the heat dissipation fins on the outer side of the oil tank. The oil conservator has the functions of storing oil and replenishing oil. When the insulating oil inside the oil tank expands and contracts due to heat, the oil conservator can adjust the amount of oil inside the oil tank to ensure that the amount of oil inside the transformer is sufficient. And in this application, the oil conservator is improved to endow it with a new function, so that the insulating oil inside the oil conservator forms a cycle with the insulating oil inside the oil tank, which is used to reduce the temperature of the insulating oil inside the oil tank. Summary of the Utility Model
[0004] In order to make up for the above deficiencies, the utility model provides an oil tank of a transformer, aiming to improve the problem that in the prior art, the oil conservator only provides enough space for the expansion and contraction of the insulating oil inside the oil tank and does not have a heat dissipation effect.
[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme: an oil tank of a transformer, comprising:
[0006] An oil tank, with a tank cover fixedly connected to the top end of the oil tank;
[0007] An oil conservator is installed on the top end of the tank cover for storing insulating oil;
[0008] An outlet pipe is communicated with the bottom end of one side of the oil conservator, and one end of the outlet pipe penetrates through the top end of the tank cover and is communicated with the oil tank;
[0009] An inlet pipe is communicated with the bottom end of the other side of the oil conservator, and one end of the inlet pipe penetrates through the top end of the tank cover and is communicated with the oil tank.
[0010] As a further description of the above technical solution:
[0011] It further includes pipelines fixedly connected to the outer side of the oil tank;
[0012] A baffle plate is arranged in a spiral shape and installed on the inner side wall of the pipeline for increasing the flow path of the insulating oil in the pipeline.
[0013] As a further description of the above technical solution:
[0014] A heat conducting sheet is fixedly connected to the inner side wall of the conservator, and the other side of the heat conducting sheet extends outside the conservator.
[0015] As a further description of the above technical solution:
[0016] A diaphragm is fixedly connected inside the conservator, and the diaphragm is made of oil-resistant rubber material.
[0017] As a further description of the above technical solution:
[0018] The top of the inlet pipe passes through the side wall of the conservator and extends into the conservator, and its position is higher than the top of the outlet pipe.
[0019] As a further description of the above technical solution:
[0020] The heat conducting sheet is made of a metal material with good heat conducting effect.
[0021] The utility model has the following beneficial effects:
[0022] In the utility model, when the temperature of the insulating oil inside the fuel tank rises, the volume of the insulating oil will expand. Since the pressure of the inlet pipe on the fuel tank is small, at this time, the relatively hot insulating oil will enter the conservator through the inlet pipe, while the relatively cold insulating oil in the conservator will enter the fuel tank through the outlet pipe. The insulating oil inside the fuel tank and the insulating oil inside the conservator form a cycle, reducing the temperature of the insulating oil inside the fuel tank. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 is a perspective view of the utility model;
[0024] Figure 2 is a sectional view of the pipeline of the utility model;
[0025] Figure 3 is a perspective view of the conservator of the utility model;
[0026] Figure 4 is a sectional view of the conservator of the utility model.
[0027] LEGEND DESCRIPTION:
[0028] 1. Fuel tank; 2. Pipeline; 3. Conservator; 4. Baffle; 5. Outlet pipe; 6. Inlet pipe; 7. Heat conducting sheet; 8. Diaphragm; 9. Tank cover. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.
[0030] Referring to Figures 1-4 , an embodiment provided by the present utility model: An oil tank of a transformer includes an oil tank 1. A bolt is threadedly connected to the top end of the oil tank 1, and the other end of the bolt is threadedly connected to a tank cover 9. The tank cover 9 is placed on the top of the oil tank 1, and the tank cover 9 is fixed by the bolt, so that the tank cover 9 can close the oil tank 1. A pipe 2 is communicated with the outside of the oil tank 1. When the insulating oil inside the oil tank 1 rises in temperature due to the operation of the windings of the transformer, the insulating oil with a higher temperature has a smaller density and thus floats, and enters the inside of the pipe 2 from the top end of the pipe 2 for natural cooling. After cooling, the insulating oil flows into the bottom of the oil tank 1 from the bottom end of the pipe 2 to dissipate heat from the iron core and windings of the transformer.
[0031] A fixing frame is fixedly connected to the top end of the tank cover 9. The fixing frame is arranged in an L-shaped structure. An oil conservator 3 is fixedly connected to the top end of the fixing frame. One side of the bottom of the oil conservator 3 is communicated with an oil outlet pipe 5. The other end of the oil outlet pipe 5 penetrates through the top end of the tank cover 9 and is communicated with the oil tank 1. The other side of the bottom of the oil conservator 3 is communicated with an oil inlet pipe 6. The other end of the oil inlet pipe 6 penetrates through the top end of the tank cover 9 and is communicated with the oil tank 1. The top of the oil inlet pipe 6 passes through the side wall of the oil conservator 3 and extends into the inside of the oil conservator 3, and the top position of the oil inlet pipe 6 is higher than the top of the oil outlet pipe 5.
[0032] Since the top position of the oil inlet pipe 6 is higher than the top of the oil outlet pipe 5, the pressure at the top of the oil inlet pipe 6 is less than the pressure at the top of the oil outlet pipe 5. The pressure generated by the oil outlet pipe 5 on the oil tank is greater than the pressure generated by the oil inlet pipe 6 on the oil tank. Moreover, since the liquid with a higher temperature has a smaller density and will be located in the upper part, while the liquid with a lower temperature has a larger density and will sink to the bottom.
[0033] When the temperature of the insulating oil inside the oil tank 1 rises, the volume of the insulating oil will expand. Since the pressure of the oil inlet pipe 6 on the oil tank is small, at this time, the insulating oil with a higher temperature will enter the inside of the oil conservator 3 through the oil inlet pipe 6, and the insulating oil with a lower temperature in the oil conservator 3 will enter the inside of the oil tank 1 through the oil outlet pipe 5. The insulating oil inside the oil tank 1 and the insulating oil inside the oil conservator 3 form a cycle to reduce the temperature of the insulating oil inside the oil tank 1.
[0034] Inside the conservator 3, a diaphragm 8 is fixedly connected. Through the diaphragm 8, the air in the upper part of the conservator 3 can be separated from the insulating oil in the lower part of the conservator 3, reducing the contact between the insulating oil and the air, reducing the possibility of the insulating oil getting damp and oxidized, delaying the aging speed of the insulating oil. The material of the diaphragm 8 is resistant nylon rubber.
[0035] On the inner bottom wall of the conservator 3, a heat conducting fin 7 is fixedly connected. One side of the heat conducting fin 7 extends out of the side wall of the conservator 3. The material of the heat conducting fin 7 is copper material with good heat conducting effect. When the insulating oil with a higher temperature inside the fuel tank 1 enters the conservator 3 through the inlet pipe 6, the heat conducting fin 7 on the side wall of the conservator 3 will transfer the heat of the insulating oil to the part of the heat conducting fin 7 outside the conservator 3 to exchange heat with the environment outside the conservator 3. In this way, the insulating oil inside the conservator 3 is cooled.
[0036] When the diaphragm 8 inside the conservator 3 expands due to the rising liquid level of the insulating oil, the connecting rod of the oil level gauge will swing upward under the push of the diaphragm 8, so that the pointer on the oil level gauge rotates accordingly, enabling the staff to judge the oil level of the insulating oil inside the conservator 3 through the swing of the pointer on the oil level gauge. And when the insulating oil with a higher temperature enters the conservator 3, it will float above the insulating oil with a lower temperature inside the conservator 3. The insulating oil with a lower temperature inside the conservator 3 will enter the fuel tank 1 through the oil delivery pipe. At the same time, the heat conducting fin 7 on the side wall of the conservator 3 will transfer the heat of the insulating oil to the part of the heat conducting fin 7 outside the conservator 3 to exchange heat with the environment outside the conservator 3. In this way, the insulating oil inside the fuel tank 1 is cooled.
[0037] Inside the pipe 2, a baffle 4 is installed. The baffle 4 is set as a spiral structure. When the pipe 2 is manufactured, the baffle 4 is inserted into the pipe 2. After bending the two ends of the pipe 2, the baffle 4 is kept inside the vertical part of the pipe 2. When the insulating oil enters the vertical part of the pipe 2, the insulating oil will flow spirally inside the pipe 2 under the guidance of the baffle 4. Compared with the existing transformer cooling oil pipes (most of the existing transformer oil pipes are straight-through type, and the insulating oil flows directly in the oil pipe, and its flow path is the same as the set path of the oil pipe, and the flow path is smaller, so there will be a situation where the insulating oil dissipates heat poorly in the oil pipe), the flow path of the insulating oil inside the pipe 2 is increased, the heat exchange time of the insulating oil inside the pipe 2 is increased, and the heat dissipation effect of the pipe 2 on the insulating oil is improved.
[0038] The spiral flow of the insulating oil inside the pipe 2 can promote the disturbance and mixing inside the liquid, making the heat transfer to the wall of the pipe 2 more quickly, thereby improving the heat dissipation efficiency.
[0039] When the temperature of the insulating oil inside the fuel tank 1 rises, the insulating oil with a higher temperature will float upward due to its lower density and enter the inside of the pipe 2 through the top of the pipe 2. And under the guidance of the spiral baffle 4 inside the pipe 2, the insulating oil flows inside the pipe 2, increasing the heat exchange duration of the insulating oil inside the pipe 2. At the same time, when the temperature of the insulating oil inside the fuel tank 1 rises, the volume of the insulating oil will expand. Since the pressure of the inlet pipe 6 on the fuel tank is small, at this time, the insulating oil with a higher temperature will enter the conservator 3 through the inlet pipe 6, while the insulating oil with a lower temperature in the conservator 3 enters the fuel tank 1 through the outlet pipe 5. The insulating oil inside the fuel tank 1 and the insulating oil inside the conservator 3 form a cycle, reducing the temperature of the insulating oil inside the fuel tank 1.
[0040] In this embodiment, a breather and a liquid level gauge are also provided on the conservator, which are the same as those of the existing transformer and will not be elaborated here. A heat dissipation fin (not shown in the figure) is also provided on the outside of the fuel tank 1, and the heat dissipation fin is also arranged in the same way as that of the existing transformer.
[0041] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. A transformer oil tank, characterized in that: include An oil tank (1), wherein a tank cover (9) is fixedly connected to the top of the oil tank (1); The oil pillow (3) is installed on the top of the box cover (9) and is used to store insulating oil; An oil outlet pipe (5) is connected to the bottom of one end of the oil pillow (3); one end of the oil outlet pipe (5) passes through the top of the tank cover (9) and is connected to the oil tank (1); An oil inlet pipe (6) is connected to the bottom of the other end of the oil pillow (3); one end of the oil inlet pipe (6) passes through the top of the tank cover (9) and is connected to the oil tank (1).
2. The oil tank of a transformer according to claim 1, characterized in that: It also includes a pipeline (2) fixedly connected to the outside of the oil tank (1); The baffle (4) is arranged in a spiral shape and is installed on the inner wall of the pipeline (2) to increase the flow path of the insulating oil in the pipeline (2).
3. The oil tank of a transformer according to claim 1, characterized in that: A heat conducting sheet (7) is fixedly connected to the inner wall of the oil pillow (3), and the other side of the heat conducting sheet (7) extends to the outside of the oil pillow (3).
4. The oil tank of a transformer according to claim 1, characterized in that: A diaphragm (8) is fixedly connected inside the oil pillow (3), and the diaphragm (8) is made of oil-resistant rubber material.
5. The oil tank of a transformer according to claim 1, characterized in that: The top of the oil inlet pipe (6) passes through the side wall of the oil pillow (3) and extends into the interior of the oil pillow (3), and is located higher than the top of the oil outlet pipe (5).
6. The oil tank of a transformer according to claim 3, characterized in that: The heat conducting sheet (7) is made of metal material.