Power transformer
Patent Information
- Application Number
- CN202521953076.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-10
- Publication Date
- 2026-09-04
- Estimated Expiration
- 2035-09-10
AI Technical Summary
[0025] In summary, the power transformer of this utility model can achieve at least the following beneficial technical effects.
Smart Images
Figure CN224720665U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of power equipment technology, and more specifically, to power transformers. Background Technology
[0002] A power transformer includes a transformer tank, a main body oil conservator, an on-load tap changer, and a switch oil conservator. The transformer tank contains the transformer core and windings. The main body oil conservator is fluidly connected to the transformer tank to compensate for volume changes in the insulating oil within the tank. The switch oil conservator is fluidly connected to the on-load tap changer to compensate for volume changes in the insulating oil within the on-load tap changer. These volume changes in the insulating oil are primarily caused by temperature variations.
[0003] When installing a power transformer, insulating oil needs to be injected into the switchgear. Currently, the oil filling of the switchgear is done by connecting a process hose between the oil pipe of the main oil conservator and the oil pipe of the switchgear, thus allowing oil to be injected into the switchgear separately. Figure 1 The solution in the related technology is shown in the figure. Figure 1 The diagram shows a process hose 1 used for oil injection. The process hose 1 is connected between the second oil pipe 90 of the main body oil conservator and the second oil pipe 60 of the switch oil conservator. The process hose 1 needs to be sent to the field every time, which is very inconvenient to operate and poses a risk that moisture can easily enter the transformer body. Utility Model Content
[0004] This application aims to provide a power transformer that simplifies the oil filling operation of switching oil conservator.
[0005] According to one aspect of the embodiments of this application, a power transformer is provided, the power transformer including a transformer tank, a main body oil conservator, an on-load tap changer, and a switch oil conservator. The transformer tank includes an iron core and windings. The main body oil conservator is in fluid communication with the transformer tank to compensate for volume changes in the insulating oil in the transformer tank. The switch oil conservator is in fluid communication with the on-load tap changer to compensate for volume changes in the insulating oil in the on-load tap changer. The power transformer further includes: a first oil pipe for the switch oil conservator, one end of which is connected to the switch oil conservator, and the other end of which is connected to the transformer tank. The first oil pipe for the switch oil conservator is used to inject insulating oil into the switch oil conservator during the installation of the power transformer; and a first valve, which is disposed on the first oil pipe for controlling the connection or disconnection of the first oil pipe for the switch oil conservator.
[0006] In this way, during the installation of the power transformer, the oil tank of the transformer is filled with oil by opening the first valve, eliminating the need for process hoses on site, simplifying the on-site operation process, and preventing humid air from entering the transformer body.
[0007] According to an exemplary embodiment of this application, the power transformer further includes: a second oil pipe for a switch oil conservator, one end of which is connected to the switch oil conservator, and the other end of which is adapted to be connected to an oil replenishment device, so that when the oil level in the switch oil conservator is lower than a predetermined minimum oil level in the switch oil conservator, insulating oil is replenished to the switch oil conservator through the second oil pipe; and a second valve, which is disposed on the second oil pipe for controlling the connection or disconnection of the second oil pipe.
[0008] In this way, by setting up a second oil pipe and a second valve in the switch oil conservator, users can conveniently replenish the insulating oil in the switch oil conservator as needed. The rapid injection and replenishment of insulating oil use different oil circuits, which is convenient to operate and improves the safety and reliability of power transformer operation.
[0009] According to an exemplary embodiment of this application, the power transformer further includes: a first oil pipe for the main body oil conservator, one end of which is connected to the main body oil conservator, and the other end of which is connected to the transformer oil tank, the first oil pipe for the main body oil conservator being used to inject insulating oil into the main body oil conservator; and a third valve, the third valve being disposed on the first oil pipe for controlling the connection or disconnection of the first oil pipe for the main body oil conservator, the power transformer being configured such that: during the installation of the power transformer, while oil is being injected into the main body oil conservator through the first oil pipe for the main body oil conservator, oil is simultaneously being injected into the switch oil conservator through the first oil pipe for the switch oil conservator.
[0010] This method allows for simultaneous oil filling of both the main oil tank and the switch oil tank during installation, optimizing the installation process, shortening operation time, and improving work efficiency.
[0011] According to an exemplary embodiment of this application, the power transformer further includes: a second oil pipe for the main body oil conservator, one end of which is connected to the main body oil conservator, and the other end of which is adapted to be connected to an oil replenishment device, so that when the oil level in the main body oil conservator is lower than a predetermined minimum oil level in the main body oil conservator, insulating oil is replenished to the main body oil conservator through the second oil pipe; and a fourth valve, which is disposed on the second oil pipe for controlling the connection or disconnection of the second oil pipe.
[0012] In this way, by setting up the second oil pipe and the fourth valve in the main body oil tank, users can conveniently replenish the insulating oil in the main body oil tank as needed. The rapid injection and replenishment of insulating oil use different oil circuits, which is convenient to operate and improves the safety and reliability of power transformer operation.
[0013] According to an exemplary embodiment of this application, the second valve is disposed at the other end of the second oil pipe of the switch oil tank, and the fourth valve is disposed at the other end of the second oil pipe of the main body oil tank.
[0014] By precisely configuring the positions of the second and fourth valves in this way, the oil circuit can be effectively controlled when replenishing oil, preventing oil leakage or misoperation, and improving the safety and accuracy of operation.
[0015] According to an exemplary embodiment of this application, the bottom region of the switch oil reservoir has a switch oil reservoir connector, and one end of the first oil pipe of the switch oil reservoir is installed at the switch oil reservoir connector.
[0016] In this way, specific connectors are installed in the bottom area of the switch oil conservator, which facilitates the connection of the first oil pipe of the switch oil conservator, simplifies on-site operations, improves sealing, and reduces maintenance costs.
[0017] According to an exemplary embodiment of this application, the first oil pipe of the switch oil reservoir is made of steel pipe, and the nominal diameter of the first oil pipe of the switch oil reservoir is in the range of 20mm to 32mm.
[0018] In this way, steel pipes with a nominal diameter of 20mm to 32mm are used to make the first oil pipe of the switch oil conservator, which not only ensures sufficient flow capacity but also reduces material consumption, achieves lightweight design, and improves economy and practicality.
[0019] According to an exemplary embodiment of this application, the first oil pipe of the main body oil tank is made of steel pipe, and the nominal diameter of the first oil pipe of the main body oil tank is in the range of 65mm to 90mm.
[0020] In this way, steel pipes with a nominal diameter of 65mm to 90mm are used to make the first oil pipe of the main oil tank, which significantly enhances the fluidity of the oil, speeds up the oil injection, and also takes into account the structural strength.
[0021] According to an exemplary embodiment of this application, the power transformer further includes: a first oil level gauge disposed in the main body oil tank for monitoring the oil level in the main body oil tank; and a second oil level gauge disposed in the switch oil tank for monitoring the oil level in the switch oil tank.
[0022] In this way, the power transformer is equipped with a first oil level gauge and a second oil level gauge to monitor the oil level of the main body oil tank and the switch oil tank in real time, preventing the oil level from being too low or too high, helping to detect and deal with problems in a timely manner, and ensuring the normal operation of the power transformer.
[0023] According to an exemplary embodiment of this application, the power transformer further includes: a switch oil conservator moisture absorption pipe, one end of which is connected to the switch oil conservator, and the other end of which has a moisture absorber and is in communication with the atmosphere via the moisture absorber.
[0024] In this way, the power transformer is equipped with a moisture-absorbing pipe in the switch oil conservator, which effectively filters moisture in the air, prevents moisture from entering the switch oil conservator, and extends the service life of the power transformer.
[0025] In summary, the power transformer of this utility model can achieve at least the following beneficial technical effects.
[0026] First, the power transformer has added a first oil pipe to the switch oil conservator and a first valve installed on the first oil pipe of the switch oil conservator. By opening the first valve, the main oil conservator and the switch oil conservator can be evacuated and filled with oil at the same time, which is convenient to operate.
[0027] Secondly, by eliminating the process hoses mentioned in the relevant technologies, operation is simplified, and humid air can be effectively prevented from entering the transformer body.
[0028] Third, it improved the quality of power transformers and extended their service life. Attached Figure Description
[0029] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:
[0030] Figure 1 This is a schematic diagram of a power transformer based on relevant technologies.
[0031] Figure 2 This is a schematic diagram of a power transformer according to an exemplary embodiment of this application.
[0032] The reference numerals in the attached figures are as follows:
[0033] 1. Process hose
[0034] 10. Transformer oil tank
[0035] 20. Main oil storage tank
[0036] 30. Switch on / off oil conservator
[0037] 40. Switch the first oil pipe of the oil conservator.
[0038] 41. One end of the first oil pipe of the switch oil conservator
[0039] 42. The other end of the first oil pipe of the switch oil conservator
[0040] 50. First valve
[0041] 60. Switch the second oil pipe of the oil conservator.
[0042] 70. Second valve
[0043] 80. First oil pipe of the main body oil tank
[0044] 90. Second oil pipe of the main body oil tank
[0045] 100. Third valve
[0046] 110. Fourth valve
[0047] 120. First oil level gauge
[0048] 130. Oil conservator desiccant suction pipe
[0049] 131. Dehumidifier
[0050] 140. Switch oil conservator connector Detailed Implementation
[0051] To enable those skilled in the art to better understand the solutions of this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this application. The nouns and pronouns related to persons in this patent application are not limited to specific genders.
[0052] It should be noted that the terms "first," "second," etc., used in this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. Regarding the accompanying drawings, directional terms such as "top," "bottom," "upper," and "lower" are used with reference to the direction of the described drawings.
[0053] First, refer to Figure 1 This diagram illustrates a power transformer according to relevant technology. The power transformer includes a transformer tank 10, a main body oil conservator 20, an on-load tap changer (not shown), and a switch oil conservator 30. The transformer tank 10 includes the transformer core, i.e., the iron core and windings. The main body oil conservator 20 is fluidly connected to the transformer tank 10 to compensate for volume changes in the insulating oil within the transformer tank 10. These changes are primarily caused by temperature fluctuations in the insulating oil. When the oil temperature rises, the oil volume expands, and the main body oil conservator 20 stores the oil; conversely, when the oil temperature drops, the oil volume contracts, and the main body oil conservator 20 replenishes the oil. The switch oil conservator 30 is fluidly connected to the on-load tap changer (not shown) to compensate for volume changes in the insulating oil within the on-load tap changer, which are also primarily caused by temperature fluctuations in the insulating oil. Figure 1 The diagram shows a process hose 1 used for filling the switch oil conservator 30 with oil. The process hose 1 needs to be sent to the field and connected each time, which is inconvenient. In addition, the use of the process hose poses a risk that moisture can easily enter the transformer body.
[0054] Reference Figure 2 This diagram illustrates a schematic representation of a power transformer according to an exemplary embodiment of this application. The power transformer also includes a transformer tank 10, a main body oil conservator 20, an on-load tap changer (not shown), and a switch oil conservator 30. The transformer tank 10 includes an iron core and windings. The main body oil conservator 20 is in fluid communication with the transformer tank 10 to compensate for volume changes in the insulating oil within the transformer tank 10. The switch oil conservator 30 is in fluid communication with the on-load tap changer to compensate for volume changes in the insulating oil within the on-load tap changer. Figure 1 The solutions are different. Figure 2 The power transformer also includes a first oil pipe 40 for the switch oil conservator and a first valve 50. One end 41 of the first oil pipe is connected to the switch oil conservator 30, and the other end 42 is connected to the transformer tank 10. The first oil pipe 40 is used to inject insulating oil into the switch oil conservator 30 during the installation of the power transformer. The first valve 50 is installed on the first oil pipe 40 to control the connection or disconnection of the first oil pipe 40.
[0055] Therefore, the power transformer of this utility model adds a first oil pipe 40 for the switch oil conservator connecting the switch oil conservator 30 and the transformer oil tank 10, and a first valve 50 installed on the first oil pipe 40. During the installation of the power transformer, the first valve 50 can be opened to simultaneously evacuate and fill oil into both the main oil conservator 20 and the switch oil conservator 30, making operation convenient. When the power transformer is running, the first valve 50 is closed. Therefore, when filling the switch oil conservator 30 with oil, the on-site operation process is simplified, and quality risks are eliminated. Furthermore, since the process hose mentioned in related technologies is eliminated when filling the switch oil conservator 30 with oil, the entry of humid air into the transformer body can be effectively prevented.
[0056] Reference Figure 2 The power transformer of this utility model further includes: a second oil pipe 60 for the switch oil conservator, one end of which is connected to the switch oil conservator 30, and the other end of which is adapted to be connected to an oil replenishment device so that when the oil level in the switch oil conservator 30 is lower than the predetermined minimum oil level, insulating oil is replenished to the switch oil conservator 30 through the second oil pipe 60; and a second valve 70, which is installed on the second oil pipe 60 to control the connection or disconnection of the second oil pipe 60. The rapid injection and replenishment of insulating oil in the switch oil conservator 30 utilize different oil circuits, which facilitates operation and improves the safety and reliability of the power transformer operation.
[0057] Reference Figure 2 The power transformer of this utility model further includes: a first oil pipe 80 for the main body oil conservator, one end of which is connected to the main body oil conservator 20, and the other end of which is connected to the transformer oil tank 10. The first oil pipe 80 is used to inject insulating oil into the main body oil conservator 20; and a third valve 100, which is installed on the first oil pipe 80 to control the connection or disconnection of the first oil pipe 80. During the installation of the power transformer, the third valve 100 and the first valve 50 are open. When oil is injected into the main body oil conservator 20 through the first oil pipe 80, oil is simultaneously injected into the switch oil conservator 30 through the first oil pipe 40. It can be understood that during the normal operation of the power transformer, the third valve 100 is in the open state, while the first valve 50 is in the closed state. Of course, under certain circumstances, the third valve 100 can be closed. For example, a gas relay (not shown) may be installed on the first oil pipe 80 of the main oil tank, and the third valve 100 may be closed when the relay is installed or under maintenance.
[0058] Reference Figure 2The power transformer of this utility model further includes: a second oil pipe 90 for the main body oil conservator, one end of which is connected to the main body oil conservator 20, and the other end of which is adapted to be connected to an oil replenishment device so that when the oil level in the main body oil conservator 20 is lower than the predetermined minimum oil level, insulating oil is replenished to the main body oil conservator 20 through the second oil pipe 90; and a fourth valve 110, which is installed on the second oil pipe 90 to control the connection or disconnection of the second oil pipe 90. The rapid injection and replenishment of insulating oil in the main body oil conservator 20 utilize different oil circuits, which facilitates operation and improves the safety and reliability of the power transformer operation.
[0059] Reference Figure 2 The second valve 70 is located at the other end of the second oil pipe 60 of the switch oil tank, and the fourth valve 110 is located at the other end of the second oil pipe 90 of the main body oil tank.
[0060] Reference Figure 2 The bottom area of the switch oil reservoir 30 has a switch oil reservoir connector 140, and one end 41 of the first oil pipe of the switch oil reservoir is installed at the switch oil reservoir connector 140.
[0061] Reference Figure 2 The first oil pipe 40 of the switch oil conservator is made of steel pipe, and its nominal diameter is in the range of 20mm to 32mm. Particularly preferably, the first oil pipe 40 is made of Q235B steel pipe with a nominal diameter of 25mm, i.e., DN25. The use of steel pipe instead of the plastic pipe used in related technologies improves the structural strength of the first oil pipe 40 of this invention. Furthermore, the first oil pipe 80 of the main body oil conservator is made of steel pipe, and its nominal diameter is in the range of 65mm to 90mm. Particularly preferably, the first oil pipe 80 is made of Q235B steel pipe with a nominal diameter of 80mm, i.e., DN80.
[0062] Reference Figure 2 The power transformer also includes: a first oil level gauge 120, which is installed in the main body oil tank 20 and is used to monitor the oil level in the main body oil tank 20; and a second oil level gauge (not shown), which is installed in the switch oil tank 30 and is used to monitor the oil level in the switch oil tank 30.
[0063] Reference Figure 2 The power transformer also includes: a switch oil conservator moisture absorption pipe 130, one end of which is connected to the switch oil conservator 30, and the other end of which has a moisture absorber 131 and is connected to the atmosphere via the moisture absorber 131.
[0064] It is understandable that the switch oil conservator 30 may have three switch oil conservator connectors, which are respectively connected to one end 41 of the first oil pipe of the switch oil conservator, one end of the second oil pipe 60 of the switch oil conservator, and one end of the moisture absorption pipe 130 of the switch oil conservator.
[0065] In summary, the power transformer of this invention adds a first oil pipe to the switch oil conservator and a first valve installed on the first oil pipe. By opening the first valve, the main oil conservator and the switch oil conservator can be filled with oil simultaneously, making operation convenient. Furthermore, since the power transformer of this invention eliminates the need for the process hoses mentioned in related technologies, it effectively prevents humid air from entering the transformer body, improving the quality of the power transformer and extending its service life.
[0066] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered to fall within the protection scope of this application.
Claims
1. A power transformer, comprising a transformer tank (10), a main body oil conservator (20), an on-load tap changer, and a switch oil conservator (30), wherein the transformer tank (10) includes an iron core and windings, the main body oil conservator (20) is in fluid communication with the transformer tank (10) to compensate for volume changes in the insulating oil in the transformer tank (10), and the switch oil conservator (30) is in fluid communication with the on-load tap changer to compensate for volume changes in the insulating oil in the on-load tap changer, characterized in that, The power transformer also includes: A first oil pipe (40) for a switch oil conservator, one end (41) of which is connected to the switch oil conservator (30), and the other end (42) of which is connected to the transformer oil tank (10), the first oil pipe (40) being used to inject insulating oil into the switch oil conservator (30) during the installation of the power transformer; and A first valve (50) is installed on the first oil pipe (40) of the switch oil reservoir to control the connection or disconnection of the first oil pipe (40) of the switch oil reservoir.
2. The power transformer according to claim 1, characterized in that, The power transformer also includes: A second oil pipe (60) for a switch oil conservator, one end of which is connected to the switch oil conservator (30), and the other end of which is adapted to be connected to an oil replenishment device, so that when the oil level in the switch oil conservator (30) is lower than a predetermined minimum oil level, insulating oil is replenished to the switch oil conservator (30) through the second oil pipe (60); and The second valve (70) is installed on the second oil pipe (60) of the switch oil reservoir to control the connection or disconnection of the second oil pipe (60) of the switch oil reservoir.
3. The power transformer according to claim 2, characterized in that, The power transformer also includes: The main body oil conservator has a first oil pipe (80), one end of which is connected to the main body oil conservator (20), and the other end of which is connected to the transformer oil tank (10). The first oil pipe (80) is used to inject insulating oil into the main body oil conservator (20); and A third valve (100) is installed on the first oil pipe (80) of the main body oil tank to control the connection or disconnection of the first oil pipe (80) of the main body oil tank. The power transformer is configured such that, during the installation of the power transformer, when oil is injected into the main body oil storage tank (20) through the first oil pipe (80) of the main body oil storage tank, oil is simultaneously injected into the switch oil storage tank (30) through the first oil pipe (40) of the switch oil storage tank.
4. The power transformer according to claim 3, characterized in that, The power transformer also includes: A second oil pipe (90) for the main body oil tank, one end of which is connected to the main body oil tank (20), and the other end of which is adapted to be connected to an oil replenishment device, so that when the oil level in the main body oil tank (20) is lower than a predetermined minimum oil level, insulating oil is replenished to the main body oil tank (20) through the second oil pipe (90); and The fourth valve (110) is installed on the second oil pipe (90) of the main body oil tank to control the connection or disconnection of the second oil pipe (90) of the main body oil tank.
5. The power transformer according to claim 4, characterized in that, The second valve (70) is located at the other end of the second oil pipe (60) of the switch oil tank, and the fourth valve (110) is located at the other end of the second oil pipe (90) of the main body oil tank.
6. The power transformer according to claim 1, characterized in that, The bottom region of the switch oil reservoir (30) has a switch oil reservoir connector (140), and one end (41) of the first oil pipe of the switch oil reservoir is installed at the switch oil reservoir connector (140).
7. The power transformer according to claim 1, characterized in that, The first oil pipe (40) of the switch oil reservoir is made of steel pipe, and the nominal diameter of the first oil pipe (40) of the switch oil reservoir is in the range of 20mm to 32mm.
8. The power transformer according to claim 3, characterized in that, The first oil pipe (80) of the main body oil tank is made of steel pipe, and the nominal diameter of the first oil pipe (80) of the main body oil tank is in the range of 65mm to 100mm.
9. The power transformer according to claim 1, characterized in that, The power transformer also includes: A first oil level gauge (120) is installed in the main body oil tank (20) to monitor the oil level in the main body oil tank (20); and The second oil level gauge is installed in the switch oil tank (30) and is used to monitor the oil level in the switch oil tank (30).
10. The power transformer according to claim 1, characterized in that, The power transformer also includes: A switch oil reservoir moisture absorption pipe (130) is provided, one end of which is connected to the switch oil reservoir (30), and the other end of the switch oil reservoir moisture absorption pipe (130) has a desiccant (131) and is connected to the atmosphere via the desiccant (131).