Distribution transformer with oil leakage and oil leakage protection
By using the design of filling pressurized oil in the sealing bag in the distribution transformer, the oil leakage problem caused by the reduction of sealing is solved, and higher sealing and service life are achieved, and maintenance costs are reduced.
Patent Information
- Application Number
- CN202421968935.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-14
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2034-08-14
AI Technical Summary
After a long time of use, the sealing performance of conventional distribution transformers is reduced, resulting in oil leakage. Replacing the sealing ring cannot solve the oil leakage problem, causing the transformer oil oxidation to accelerate and serious waste.
The design of filling pressurized oil in the sealed bag is adopted. The interference coordination between the top cover and the shell is achieved through the expansion of the sealed bag, ensuring sealing, and monitoring and adjusting the sealing effect through structures such as oil injection pipe, pressure gauge and vent pipe to prevent oil leakage.
It improves the sealing of the transformer, extends the service life, reduces oil leakage and oxidation, and reduces maintenance costs.
Smart Images
Figure CN223051969U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electrical appliance protection, in particular to a distribution transformer with oil leakage protection. Background Art
[0002] The distribution transformer is one of the important devices in the power supply and distribution systems of industrial and mining enterprises and civil buildings. By injecting transformer oil into the transformer, on the one hand, it can improve the insulation strength and produce an arc extinguishing effect, avoid moisture erosion of the winding and iron core, and at the same time, it can also be used as a good coolant to achieve faster heat dissipation. However, the sealing performance of conventional transformers decreases after a long time of use. Since the transformer oil is filled to reduce the oxidation degree of the transformer oil, oil leakage occurs at the top. Once oil leakage occurs, it indicates that the sealing performance of the transformer has decreased. Coupled with the high-temperature environment inside the transformer, it will cause the transformer oil to oxidize and deteriorate more quickly. When the outer shell of the transformer also shows oxidation and deterioration but cannot be distinguished by the naked eye, even replacing the sealing ring cannot solve the problem of oil leakage, let alone solve the problem of accelerated aging of the transformer oil, resulting in a waste of a tank of oil.
[0003] Therefore, in view of the above deficiencies, it is necessary to provide a distribution transformer with oil leakage protection. Summary of the Utility Model
[0004] (1) Technical Problems to be Solved
[0005] The technical problem to be solved by the utility model is to solve the problem that the conventional sealing structure cannot solve the sealing effect when the structure of the transformer is damaged.
[0006] (2) Technical Solutions
[0007] To solve the above technical problems, the utility model provides a distribution transformer with oil leakage protection, which includes a housing, a top cover and a sealing bag. The housing is filled with transformer oil, the winding and coil are immersed in the housing, the top cover covers the opening at the top of the housing, and a square ring-shaped sealing bag is placed between the top cover and the housing, and the sealing bag is filled with pressurized hydraulic fluid.
[0008] As a further description of the utility model, preferably, a square ring-shaped long flange is fixedly connected to the top of the top cover, the outer diameter of the long flange is smaller than the inner diameter of the housing, and the sealing bag is arranged between the long flange and the inner wall surface of the housing.
[0009] As a further description of the utility model, preferably, rounded corners are provided at the four corners of the outer wall surface of the long flange and the inner wall surface of the housing.
[0010] As a further description of the utility model, preferably, a bottom support is fixedly connected to the bottom of the long flange, the bottom support extends outside the long flange, and the sealing bag is placed on the bottom support.
[0011] As a further description of the present utility model, preferably, an oil injection pipe is fixedly connected to one side of the sealing bag. The oil injection pipe extends out of the top cover so as to inject oil or pump oil into the sealing bag, and a sealing cap is externally threaded on the oil injection pipe.
[0012] As a further description of the present utility model, preferably, a pressure gauge is connected to one side of the sealing bag, and the pressure gauge extends out of the top cover.
[0013] As a further description of the present utility model, preferably, a short flange is fixedly connected to the bottom of the top cover on the side of the sealing bag away from the long flange. The length of the short flange is less than that of the long flange; an annular groove is provided on the inner side of the top of the outer shell, and the short flange is embedded in the groove.
[0014] As a further description of the present utility model, preferably, sealing rings are pressed between the top of the top cover and the top of the outer shell, and between the bottom of the short flange and the bottom of the groove.
[0015] As a further description of the present utility model, preferably, an oil tank is fixedly connected to one side of the outer top of the top cover. A pipeline is fixedly connected between the bottom of the oil tank and the top cover, and a controller is fixedly connected to the pipeline to supplement the outer shell when the oil liquid in the outer shell decreases.
[0016] As a further description of the present utility model, preferably, an air release pipe is fixedly connected to the other side of the outer top of the top cover. A one-way valve is provided on the air release pipe, and a protective film is fixedly connected to the pipe orifice of the air release pipe to automatically break and release air when the pressure in the outer shell exceeds the standard.
[0017] (III) Beneficial effects
[0018] The above technical solutions of the present utility model have the following advantages:
[0019] By improving the existing sealing method, the present utility model injects pressurized oil liquid into the sealing bag. On the one hand, the expansion of the sealing bag enables an interference fit to always exist between the top cover and the outer shell, ensuring the sealing performance. At the same time, it can also fill the sealing problems caused by structural deficiencies, thereby extending the service life of the transformer. Description of the drawings
[0020] Figure 1 is the overall assembly effect drawing of the present utility model;
[0021] Figure 2 is the left side view of the present utility model;
[0022] Figure 3 is the right side view of the present utility model;
[0023] Figure 4 is the installation position drawing of the sealing bag of the present utility model.
[0024] In the figure: 1. Outer shell; 2. Top cover; 21. Long flange; 22. Bottom support; 23. Short flange; 24. Sealing ring; 3. Sealing bag; 31. Oil injection pipe; 32. Sealing cap; 33. Pressure gauge; 4. Oil tank; 41. Oil pipe; 42. Controller; 5. Air release pipe; 51. Check valve; 52. Protective film. Specific implementation manner
[0025] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. 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.
[0026] A distribution transformer with oil leakage and seepage prevention, in combination with Figure 1 , Figure 2 , includes an outer shell 1, a top cover 2, a sealing bag 3 and an oil tank 4. The outer shell 1 is filled with transformer oil, and the windings and coils are immersed in the outer shell 1. The top cover 2 covers the opening at the top of the outer shell 1. The sealing bag 3 is placed between the top cover 2 and the outer shell 1, and the sealing bag 3 is filled with pressurized oil.
[0027] In combination with Figure 2 , Figure 4 , the outer shell 1 is a square shell, and heat dissipation fins are provided outside the outer shell 1 to further improve the heat dissipation performance. The top cover 2 is a square plate-like structure. A square annular long flange 21 is fixedly connected to the top of the top cover 2. The outer diameter of the long flange 21 is smaller than the inner diameter of the outer shell 1. A bottom support 22 is fixedly connected to the bottom of the long flange 21. The bottom support 22 extends outside the long flange 21. The square annular sealing bag 3 is placed on the bottom support 22 and is located between the long flange 21 and the inner wall surface of the outer shell 1. The bottom support 22 can support the sealing bag 3 to prevent the sealing bag 3 from slipping off from the lower part of the top cover 2 when the top cover 2 is hoisted. Rounded corners are provided at the four corners of the outer wall surface of the long flange 21 and the inner wall surface of the outer shell 1 to prevent the sealing bag 3 from being punctured when the sealing bag 3 expands, and at the same time enable the sealing bag 3 to better fit with the top cover 2 and the outer shell 1 to ensure the sealing effect.
[0028] In combination with Figure 3 , Figure 4, a fuel injection pipe 31 is fixedly connected to one side of the sealing bag 3. The fuel injection pipe 31 extends out of the top cover 2. By providing the fuel injection pipe 31, the sealing bag 3 can be kept in an empty state when the top cover 2 is hoisted onto the outer shell 1, ensuring that the top cover 2 can be smoothly covered on the outer shell 1. Subsequently, oil is injected into the sealing bag 3 to make the sealing bag 3 expand until the sealing bag 3 is in interference fit with the outer shell 1 and the top cover 2 respectively, achieving sealing. When the transformer needs to be overhauled or replaced, the oil is pumped out through the fuel injection pipe 31 to make the fuel injection pipe 31 loose, so as to avoid abrasion of the sealing bag 3 when the top cover 2 is lifted off. The fuel injection pipe 31 is externally threaded with a sealing cap 32, which cooperates with the valve in the fuel injection pipe 31 to prevent the oil in the sealing bag 3 from flowing out.
[0029] Combined with Figure 3 , Figure 4 , a pressure gauge 33 is connected to one side of the sealing bag 3. The pressure gauge 33 extends out of the top cover 2. The situation of the sealing bag 3 can be observed in real time through the pressure gauge. If the pressure drops too much, it indicates that the sealing bag 3 is damaged. Since the oil injected into the sealing bag 3 is the same as the transformer oil, even if the sealing bag 3 is damaged, it will not pollute the transformer oil.
[0030] Combined with Figure 2 , Figure 4 , a short flange 23 is fixedly connected to the bottom of the top cover 2 on the side of the sealing bag 3 away from the long flange 21. The length of the short flange 23 is less than that of the long flange 21. An annular groove is provided on the inner side of the top of the outer shell 1, and the short flange 23 is embedded in the groove. The setting of the short flange 23 in cooperation with the long flange 21 can increase the complexity of the air path between the outer shell 1 and the top cover 2, so that external air is not easily introduced into the outer shell 1, and at the same time, it also increases the difficulty of transformer oil leakage. Moreover, the sealing bag 3 is clamped between the long flange 21 and the short flange 23, and with the support of the bottom support 22, it can ensure the stable connection between the sealing bag 3 and the top cover 2 and is not easily detached during hoisting. In addition, when the sealing bag 3 is not under pressure, it can increase the contact area between the top cover 2 and the outer shell 1, improving the sealing effect and the service life of the sealing bag 3 at the same time. Sealing rings 24 are pressed between the top of the top cover 2 and the top of the outer shell 1 as well as between the bottom of the short flange 23 and the bottom of the groove, further improving the sealing performance of the top cover 2 and the outer shell 1 and preventing oil leakage and oil oxidation.
[0031] Combined with Figure 1 , Figure 2, an oil tank 4 is fixedly connected to one side of the top of the top cover 2, an oil pipe 41 is fixedly connected between the bottom of the oil tank 4 and the top cover 2, and a controller 42 is fixedly connected to the oil pipe 41 to replenish the shell 1 when the oil in the shell 1 is reduced, ensuring that the oil in the shell 1 fills the space to avoid the appearance of air cavities that accelerate the oxidation and aging of the transformer oil, thereby increasing the service life of the transformer oil. A venting pipe 5 is fixedly connected to the other side of the top of the top cover 2, and a one-way valve 51 is provided on the venting pipe 5. A protective film 52 is fixedly connected to the mouth of the venting pipe 5 to automatically break and release air when the pressure in the shell 1 exceeds the standard. Since high temperature will be generated in the transformer, and the good sealing inside the transformer will increase the pressure in the transformer, when the pressure increases to close to the limit value, the protective film will be first squeezed and exploded by the pressure, releasing the pressure in the transformer to the outside, and then the staff can quickly find the broken protective film when performing maintenance, and can intuitively understand that the pressure in the transformer exceeds the standard, so that maintenance can be carried out in time. The one-way valve 51 can prevent outside air from entering the housing 1, ensuring that the sealing inside the transformer will not be affected when the protective film 52 is damaged.
[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.
Claims
1. A distribution transformer with oil seepage and leakage protection, characterized in that: The invention comprises an outer shell (1), a top cover (2) and a sealing bag (3); the outer shell (1) is filled with transformer oil, the winding and the iron core are immersed in the outer shell (1), the top cover (2) covers the top opening of the outer shell (1), the square ring-shaped sealing bag (3) is placed between the top cover (2) and the outer shell (1), and the sealing bag (3) is filled with pressurized oil.
2. A distribution transformer with oil seepage and leakage protection according to claim 1, characterized in that: A square annular long flange (21) is fixedly connected to the top of the top cover (2); the outer diameter of the long flange (21) is smaller than the inner diameter of the outer shell (1); and the sealing bag (3) is arranged between the long flange (21) and the inner wall surface of the outer shell (1).
3. A distribution transformer with oil seepage and leakage protection according to claim 2, characterized in that: The outer wall surface of the long flange (21) and the inner wall surface of the outer shell (1) are all provided with rounded corners at four corners.
4. A distribution transformer with oil seepage and leakage protection according to claim 3, characterized in that: A bottom bracket (22) is fixedly connected to the bottom of the long flange (21), the bottom bracket (22) extends out of the long flange (21), and the sealing bag (3) is placed on the bottom bracket (22).
5. A distribution transformer with oil seepage and leakage protection according to claim 4, characterized in that: An oil injection pipe (31) is fixedly connected to one side of the sealing bag (3). The oil injection pipe (31) extends out of the top cover (2) so as to inject or extract oil into the sealing bag (3). The oil injection pipe (31) is externally threadedly connected to a sealing cap (32).
6. A distribution transformer with oil seepage and leakage protection according to claim 5, characterized in that: A pressure gauge (33) is connected to one side of the sealing bag (3), and the pressure gauge (33) extends out of the top cover (2).
7. A distribution transformer with oil seepage and leakage protection according to claim 6, characterized in that: The bottom of the top cover (2) is located on the side of the sealing bag (3) away from the long flange (21) and is fixedly connected with a short flange (23), and the length of the short flange (23) is shorter than the long flange (21); an annular groove is provided on the inner side of the top of the outer shell (1), and the short flange (23) is embedded in the groove.
8. A distribution transformer with oil seepage and leakage protection according to claim 7, characterized in that: Sealing rings (24) are pressed between the top of the top cover (2) and the top of the shell (1), and between the bottom of the short flange (23) and the bottom of the groove.
9. A distribution transformer with oil seepage and leakage protection according to claim 8, characterized in that: An oil tank (4) is fixedly connected to one side of the top of the top cover (2), an oil pipe (41) is fixedly connected between the bottom of the oil tank (4) and the top cover (2), and a controller (42) is fixedly connected to the oil pipe (41) to replenish the outer shell (1) when the oil in the outer shell (1) is reduced.
10. A distribution transformer with oil seepage and leakage protection according to claim 9, characterized in that: A deflation pipe (5) is fixedly connected to the other side of the top of the top cover (2), a one-way valve (51) is provided on the deflation pipe (5), and a protective film (52) is fixedly connected to the mouth of the deflation pipe (5) so as to automatically break and deflate when the pressure in the shell (1) exceeds the standard.