A transformer vacuum oiling system

Abstract

The utility model discloses a transformer vacuum oil injection system, including oil storage tank, vacuum tank and vacuum unit, be provided with vacuum cavity for placing transformer in vacuum tank, vacuum cavity is provided with several, two adjacent vacuum cavities are separated through the partition, and the oil tank of each transformer is connected through the oil injection pipeline with oil storage tank, and the vacuum unit is communicated with oil storage tank and each vacuum cavity through the vacuum pipeline respectively, through a plurality of independent vacuum cavities, the system can select corresponding vacuum cavity and carry out vacuumizing treatment according to the quantity of the transformer to be injected, the volume of single vacuum cavity is smaller, can reach the vacuum degree required fast to facilitate the oil injection, greatly improve the use flexibility and production efficiency of oil injection system, be applicable to the large -scale production or overhaul scene.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment technology, specifically to a transformer vacuum oil injection system. Background Technology

[0002] A transformer is a device that uses the principle of electromagnetic induction to change alternating current voltage. It is widely used in the power industry. An oil-immersed transformer is a distribution transformer that uses transformer oil for cooling. It is a new type of high-performance transformer with a more rational structure and superior performance, and is one of the important pieces of equipment in the power supply and distribution systems of industrial and mining enterprises and civil buildings. After assembly, an oil-immersed transformer needs to be filled with transformer oil under vacuum conditions.

[0003] Existing vacuum oil filling technology refers to the process where, after the transformer is fully assembled, it is placed in a vacuum tank, and both the transformer and the vacuum tank are evacuated before oil filling is performed while the tank is still being evacuated. After oil filling, the process continues with vacuuming and degassing. To improve oil filling efficiency, some manufacturers choose to use large vacuum tanks to hold multiple transformers, enabling continuous or simultaneous oil filling of multiple transformers. However, due to the large volume of these large vacuum tanks, existing vacuuming devices require prolonged operation to achieve the required vacuum level. This is especially problematic when filling a single transformer, easily leading to resource waste and making it difficult to meet the oil filling needs of different situations. Utility Model Content

[0004] To address the shortcomings of existing technologies, a transformer vacuum oil filling system is proposed, which solves the problem that in the aforementioned technologies, the vacuum tank is large and the vacuuming device requires a long time to operate to achieve the required vacuum level, which is especially prone to resource waste when filling a single transformer.

[0005] To achieve the above objectives, the present invention proposes the following technologies: A transformer vacuum oil injection system includes an oil storage tank, a vacuum tank, and a vacuum pumping unit. The vacuum tank is provided with a vacuum chamber for placing the transformer. Several vacuum chambers are provided, and adjacent vacuum chambers are separated by partitions. The oil storage tank is connected to the oil tank of each transformer through an oil injection pipeline. The vacuum pumping unit is connected to the oil storage tank and each vacuum chamber through a vacuum pumping pipeline.

[0006] Furthermore, the air inlet of the vacuum unit is equipped with a first vacuum main pipe, and each vacuum chamber is connected to a first vacuum branch that communicates with the first vacuum main pipe. A pressure control valve is provided on the first vacuum branch.

[0007] Furthermore, a main oil injection pipe is provided at the bottom of the oil storage tank, and an oil injection branch pipe is connected to the transformer. The oil injection branch pipe is connected to the main oil injection pipe, and a first solenoid valve and a flow meter are provided on the oil injection branch pipe.

[0008] Furthermore, the oil storage tank is provided with a first oil storage chamber and a second oil storage chamber for storing different types of transformer oil. The first oil storage chamber and the second oil storage chamber are respectively connected to the main oil injection pipe through oil injection branches.

[0009] Furthermore, a second solenoid valve is installed on each of the two oil injection branches, and an oil pump and a check valve are installed on the main oil injection pipe. The check valve is located on the side of the oil pump away from the oil injection branch.

[0010] Furthermore, the vacuum pumping unit is also connected to a second vacuum main pipe. The tops of the first oil storage chamber and the second oil storage chamber are respectively connected to the second vacuum main pipe through a second vacuum branch. A pressure control valve is provided on the second vacuum branch.

[0011] Furthermore, the first and second vacuum main pipes are respectively equipped with vacuum gauges for detecting the vacuum level, and the first and second oil storage chambers are respectively connected to oil inlet pipes for refueling, with oil inlet valves installed on the oil inlet pipes.

[0012] Furthermore, a manual regulating valve is provided between the inlet of the oil pump and the oil storage tank, and a bypass pipeline is provided between the outlet of the oil pump and the first oil storage chamber and the second oil storage chamber, respectively, and a bypass valve is provided on the bypass pipeline.

[0013] Compared with the prior art, the comprehensive effects brought about by this utility model include: By setting up multiple vacuum chambers inside the vacuum tank to accommodate the transformers to be injected with oil, the vacuum pumping unit is connected to the oil storage tank and each vacuum chamber of the vacuum tank through vacuum pumping pipelines to perform vacuuming treatment on the oil storage tank and each vacuum chamber. With multiple independent vacuum chambers, this system can select the corresponding vacuum chamber for vacuuming treatment according to the number of transformers to be injected with oil. The volume of each vacuum chamber is small, which can quickly reach the required vacuum level for oil injection, greatly improving the flexibility and production efficiency of the oil injection system. It is suitable for large-scale production or maintenance scenarios. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model.

[0015] Legend: 1. Oil storage tank; 2. Vacuum tank; 3. Vacuum pumping unit; 4. Transformer; 5. Baffle plate; 6. First vacuum main pipe; 7. First vacuum branch; 8. Pressure control valve; 9. Oil injection main pipe; 10. Oil injection branch pipe; 11. First solenoid valve; 12. Flow meter; 13. First oil storage chamber; 14. Second oil storage chamber; 15. Oil injection branch; 16. Second solenoid valve; 17. Second vacuum main pipe; 18. Second vacuum branch; 19. Vacuum gauge; 20. Bypass pipe. Detailed Implementation

[0016] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0017] In this document, terms such as “up,” “down,” “left,” “right,” and “top” indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0018] like Figure 1 As shown, a transformer vacuum oil injection system includes an oil storage tank 1, a vacuum tank 2, and a vacuum pumping unit 3. The vacuum tank 2 is provided with a vacuum chamber for placing a transformer 4. There are several vacuum chambers, and adjacent vacuum chambers are separated by partitions 5. The oil storage tank 1 is connected to the oil tank of each transformer 4 through an oil injection pipeline. The vacuum pumping unit 3 is connected to the oil storage tank 1 and each vacuum chamber through a vacuum pumping pipeline.

[0019] A vacuum chamber is set inside the vacuum tank 2 to accommodate the transformer 4 to be injected with oil. To facilitate batch operation and improve production efficiency, several vacuum chambers are set. Adjacent vacuum chambers are physically separated by a partition 5, so that each vacuum chamber can be vacuumed independently or simultaneously without interfering with each other.

[0020] Oil storage tank 1 is connected to the oil tank of each transformer 4 through an oil injection pipeline and is used to inject insulating oil into the transformer 4. Vacuum pumping unit 3, as the core air extraction unit of the system, is connected to each vacuum chamber of oil storage tank 1 and vacuum tank 2 through vacuum pumping pipelines and is used to perform vacuuming treatment on oil storage tank 1 and each vacuum chamber to remove air and moisture.

[0021] By setting up multiple independent vacuum chambers, this system can select the corresponding vacuum chamber for vacuuming based on the number of transformers to be oiled. The volume of a single vacuum chamber is small, which can quickly reach the required vacuum level for oil injection, greatly improving the flexibility and production efficiency of the oil injection system. It is suitable for large-scale production or maintenance scenarios.

[0022] In the transformer vacuum oil injection system of this embodiment, the air inlet end of the vacuum pumping unit 3 is equipped with a first vacuum pumping main pipe 6, and each vacuum chamber is connected to a first vacuum pumping branch 7 that communicates with the first vacuum pumping main pipe 6. A pressure control valve 8 is provided on the first vacuum pumping branch 7.

[0023] To further optimize the vacuum control of vacuum tank 2, the vacuuming pipeline in this embodiment has been refined. A first vacuuming main pipe 6 is installed at the air inlet of the vacuuming unit 3, and a first vacuuming branch pipe 7 is connected to each vacuum chamber. All first vacuuming branch pipes 7 converge and communicate with the first vacuuming main pipe 6.

[0024] By configuring an independent pressure control valve 8 for each vacuum chamber, the operator can precisely and independently control the opening and closing of the vacuuming passage connecting each vacuum chamber. This allows the system to flexibly adapt to the processing needs of different numbers of transformers 4. For example, a pressure holding check can be performed on a certain vacuum chamber while other vacuum chambers continue to be evacuated, significantly improving control accuracy and flexibility.

[0025] In the transformer vacuum oil injection system of this embodiment, the bottom of the oil storage tank 1 is provided with an oil injection main pipe 9, the transformer 4 is connected with an oil injection branch pipe 10, the oil injection branch pipe 10 is connected to the oil injection main pipe 9, and the oil injection branch pipe 9 is provided with a first solenoid valve 11 and a flow meter 12.

[0026] The first solenoid valve 11 enables remote automatic control of the oil injection operation of each transformer 4, while the flow meter 12 can monitor and provide feedback on the amount of oil injected into each transformer 4 in real time, ensuring accurate and quantitative oil injection, effectively preventing insufficient or excessive oil injection, and guaranteeing the insulation performance and quality stability of the transformer 4.

[0027] In the transformer vacuum oil injection system of this embodiment, the oil storage tank 1 is provided with a first oil storage chamber 13 and a second oil storage chamber 14 for storing different types of transformer oil. The first oil storage chamber 13 and the second oil storage chamber 14 are respectively connected to the oil injection main pipe 9 through the oil injection branch 15.

[0028] To enable the system to adapt to different types of transformer oil, the oil storage tank 1 has been optimized in this embodiment. The oil storage tank 1 is internally divided into a first oil storage chamber 13 and a second oil storage chamber 14 for storing different types of transformer oil (such as insulating oils of different grades or with different properties).

[0029] The above configuration enables a single oil injection system to flexibly store and supply two different types of transformer oil without the need to replace the oil storage tank or perform complex cleaning work, thus meeting the oil requirements of different transformers and further enhancing the system's versatility and operational efficiency.

[0030] In the transformer vacuum oil injection system of this embodiment, a second solenoid valve 16 is respectively installed on the two oil injection branches 15, and an oil pump and a check valve are installed on the oil injection main pipe 9. The check valve is located on the side of the oil pump away from the oil injection branch 15.

[0031] To further improve the automation and reliability of the oil injection process, this embodiment further refines the oil injection pipeline. A second solenoid valve 16 is installed on each of the two oil injection branch lines 15 to control the oil flow to the corresponding oil storage chambers. An oil pump (not labeled in the figure) is installed on the main oil injection pipe 9 to provide power for the oil flow.

[0032] The second solenoid valve 16 enables automatic control of different oil types. The oil pump ensures the stability of the injection pressure and flow rate. The one-way valve effectively prevents the oil in the pipeline from flowing back to the oil storage tank 1 due to gravity or pressure difference during oil injection intervals or system shutdowns, thus avoiding air entering the pipeline system and ensuring the purity of the injected oil and the reliability of system startup.

[0033] In the transformer vacuum oil injection system of this embodiment, the vacuum pumping unit 3 is also connected to a second vacuum pumping main pipe 17. The tops of the first oil storage chamber 13 and the second oil storage chamber 14 are respectively connected to the second vacuum pumping main pipe 17 through a second vacuum pumping branch 18. A pressure control valve 8 is provided on the second vacuum pumping branch 18.

[0034] To ensure that the transformer oil in the oil storage tank 1 is also in optimal condition, the vacuum pumping unit 3 is also connected to a second vacuum main pipe 17 and a second vacuum branch 18, which are respectively connected to the first oil storage chamber 13 and the second oil storage chamber 14.

[0035] By adopting the above settings, the transformer oil in the oil storage tank 1 can be degassed and dehydrated before oil injection, removing dissolved gases and moisture from the oil, thereby improving the quality of the insulating oil injected into the transformer 4 from the source, and further improving the insulation performance and service life of the transformer 4.

[0036] In the transformer vacuum oil injection system of this embodiment, the first vacuum main pipe 6 and the second vacuum main pipe 17 are respectively equipped with vacuum gauges 19 for detecting the vacuum level, and the first oil storage chamber 13 and the second oil storage chamber 14 are respectively connected to oil inlet pipes for adding oil, and oil inlet valves are provided on the oil inlet pipes.

[0037] The vacuum gauge 19 provides operators with intuitive vacuum level data, facilitating monitoring of the system's operating status and enabling precise control. Independent oil inlet lines and valves make replenishing oil to different reservoirs more convenient and faster, and reduces the risk of oil type confusion.

[0038] In the transformer vacuum oil injection system of this embodiment, a manual regulating valve is provided between the inlet of the oil pump and the oil storage tank 1, and a bypass pipeline 20 is provided between the outlet of the oil pump and the first oil storage chamber 13 and the second oil storage chamber 14, respectively. A bypass valve is provided on the bypass pipeline 20.

[0039] To enhance the flexibility and safety of system operation, a manual regulating valve (not labeled in the figure) is added to the pipeline between the inlet of the oil pump and the oil storage tank 1. At the same time, bypass pipelines 20 are respectively provided between the outlet of the oil pump and the first oil storage chamber 13 and the second oil storage chamber 14, and a bypass valve is installed on each bypass pipeline 20.

[0040] The manual regulating valve acts as a safety barrier, allowing manual shut-off of the oil circuit during maintenance or emergencies. The bypass pipeline 20 and the bypass valve constitute a bypass circulation system. Before formal oil filling, it can be used to start the oil pump to circulate the oil in the pipeline and expel gas from the pipeline. When there is no need to fill the transformer 4 with oil, it can be used for self-circulation of oil inside the oil storage tank 1 to keep the oil active or for internal filtration, greatly improving the system's functional completeness and operational flexibility.

[0041] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "rotation", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0042] Although embodiments of the present invention have been shown and described in detail, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A transformer vacuum oil injection system, characterized in that, It includes an oil storage tank, a vacuum tank, and a vacuum pumping unit. The vacuum tank is equipped with a vacuum chamber for placing the transformer. There are several vacuum chambers, and adjacent vacuum chambers are separated by partitions. The oil storage tank is connected to the oil tank of each transformer through an oil injection pipeline. The vacuum pumping unit is connected to the oil storage tank and each vacuum chamber through a vacuum pumping pipeline.

2. The transformer vacuum oil injection system according to claim 1, characterized in that, The vacuum pumping unit is equipped with a first vacuum main pipe at the air inlet end, and each vacuum chamber is connected to a first vacuum branch that communicates with the first vacuum main pipe. A pressure control valve is provided on the first vacuum branch.

3. A transformer vacuum oil injection system according to claim 2, characterized in that, The bottom of the oil storage tank is equipped with an oil injection main pipe, and the transformer is connected to an oil injection branch pipe. The oil injection branch pipe is connected to the oil injection main pipe, and the oil injection branch pipe is equipped with a first solenoid valve and a flow meter.

4. A transformer vacuum oil injection system according to claim 2, characterized in that, The oil storage tank is equipped with a first oil storage chamber and a second oil storage chamber for storing different types of transformer oil. The first oil storage chamber and the second oil storage chamber are respectively connected to the main oil injection pipe through oil injection branches.

5. A transformer vacuum oil injection system according to claim 4, characterized in that, A second solenoid valve is installed on each of the two oil injection branches, and an oil pump and a check valve are installed on the main oil injection pipe. The check valve is located on the side of the oil pump away from the oil injection branch.

6. A transformer vacuum oil injection system according to claim 4, characterized in that, The vacuum pumping unit is also connected to a second vacuum main pipe. The tops of the first oil storage chamber and the second oil storage chamber are respectively connected to the second vacuum main pipe through a second vacuum branch. A pressure control valve is provided on the second vacuum branch.

7. A transformer vacuum oil injection system according to claim 6, characterized in that, The first and second vacuum main pipes are respectively equipped with vacuum gauges for detecting the vacuum level, and the first and second oil storage chambers are respectively connected to oil inlet pipes for refueling, and oil inlet valves are provided on the oil inlet pipes.

8. A transformer vacuum oil injection system according to claim 5, characterized in that, A manual regulating valve is provided between the inlet of the oil pump and the oil storage tank. A bypass pipeline is provided between the outlet of the oil pump and the first oil storage chamber and the second oil storage chamber, and a bypass valve is provided on the bypass pipeline.

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