Transformer oil gas operation process conversion device
By designing the transformer oil and gas operation process conversion device, the problem of repeated disassembly of pipelines during transformer maintenance is solved, and efficient conversion and safety improvement of the process is achieved.
Patent Information
- Application Number
- CN202422126126.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-30
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-08-30
AI Technical Summary
In the prior art, the pipeline is repeatedly dismantled during the maintenance of the transformer to complete the process conversion, which increases the workload and increases the risk of leakage, and insufficient top valves lead to inconvenience in operation.
A transformer oil and gas operation process conversion device is designed to achieve efficient conversion of vacuuming, drying air and hot oil circulation processes through the combination of the main valve body, connecting bent pipes, four-way pipes and multiple valves, and avoid frequent disassembly of pipelines.
The efficient and convenient conversion of three processes has been achieved, reducing workload and leakage risks, and improving maintenance safety and flexibility.
Smart Images
Figure CN223090447U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of transformer maintenance, in particular to a device for converting the oil and gas operation process of a transformer. Background Art
[0002] During the spray drying and vacuum hot oil drying of large transformers, it is necessary to repeatedly cycle through the three processes of heat transfer oil spraying, vacuum pumping, and filling with dry air to break the vacuum for a long time. During the overhaul and disassembly and inspection of transformers, in order to promptly remove the moisture on the surface of the core insulation, it is necessary to pump the vacuum of the transformer and fill it with dry air multiple times during the shutdown period.
[0003] However, since there is generally only one valve at the top of the transformer, which is used for both oil treatment and vacuum pumping, in the past, the conversion of pipelines and processes was generally completed by repeatedly disassembling the relevant pipelines. This not only greatly increased the corresponding workload, but also increased the probability of leakage and may even cause some leakage. Therefore, it is necessary to design a pipeline conversion device that can adjust the corresponding dimensions and pipeline connection directions, so as to efficiently and conveniently convert the pipelines of the three processes by operating the corresponding valves at the same position. In addition, some valves at the top of the transformer are arranged at the side end of the oil tank, and the pipeline conversion device is also used to transfer the pipeline connection position to ensure the safety of related operations. Summary of the Utility Model
[0004] The main purpose of the utility model is to provide a device for converting the oil and gas operation process of a transformer, so as to solve the problem that the conversion of pipelines and processes is completed by repeatedly disassembling the relevant pipelines, which greatly increases the corresponding workload.
[0005] To solve the above technical problems, the technical solution adopted by the utility model is: a device for converting the oil and gas operation process of a transformer, one end of the total valve body is communicated with one end of a connecting elbow, the other end of the connecting elbow is communicated with the lower end of a four-way pipe, a self-sealing inflation joint is arranged at the upper end of the four-way pipe, one side of the four-way pipe is communicated with an emergency drain port, a first valve is arranged on the emergency drain port, the other side of the four-way pipe is communicated with a three-way pipe, and the two pipes of the three-way pipe are respectively a first oil circulation pipe and a second oil circulation pipe, and valves are arranged on both the first oil circulation pipe and the second oil circulation pipe.
[0006] In a preferred solution, threads are arranged inside both ends of the connecting elbow, and both ends of the connecting elbow are threadedly connected with the total valve body and the four-way pipe respectively.
[0007] In a preferred solution, a second valve is arranged between the self-sealing inflation joint and the four-way pipe, and a compound pressure gauge is also arranged on the pipeline below the second valve.
[0008] In a preferred solution, the compound pressure gauge is communicated with the four-way pipe through a buffer elbow, and a third valve is arranged between the four-way pipe and the buffer elbow.
[0009] In a preferred embodiment, a fourth valve and a fifth valve are respectively provided on the first oil circulation pipe and the second oil circulation pipe.
[0010] In a preferred embodiment, oil pipe French joints are provided at both ends of the first oil circulation pipe and the second oil circulation pipe, or flange connection plates are provided.
[0011] In a preferred embodiment, the four-way pipe and the three-way pipe are connected by a flange plate, and the four-way pipe is connected to the connecting elbow through a flange plate.
[0012] In a preferred embodiment, a polytetrafluoroethylene sealing ring is provided inside the flange plate.
[0013] The utility model provides a transformer oil-gas operation process conversion device. The conversion device is connected to a corresponding valve above the transformer oil tank through a connecting elbow (3), and the conversion of three processes of vacuum pumping, filling with dry air, and hot oil circulation is efficiently and conveniently completed by operating the corresponding valves, so as to improve the relevant work efficiency and ensure the safety of the corresponding operation.
[0014] The following are the beneficial effects:
[0015] 1. The vacuum pumping, dry air filling, and oil circulation pipelines are isolated from each other through relevant valves, ensuring that the three processes do not interfere with each other, and the process conversion can be efficiently and conveniently completed by operating the corresponding valves at the same position, improving the relevant maintenance process.
[0016] 2. The device avoids repeated disassembly of the corresponding pipelines, effectively reduces the corresponding workload, and at the same time reduces the probability of oil and gas leakage of the equipment.
[0017] 3. The device can overcome the problem of insufficient valves at the top of the transformer, can transfer the position of the pipeline connection, randomly adjust the flange size, reduce the corresponding operation risk, and is widely applied to all transformer maintenance and drying operations. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The following further describes the present utility model in conjunction with the drawings and embodiments:
[0019] Figure 1 is the structural diagram of the installation position of the conversion device of the present utility model;
[0020] Figure 2 is the main view layout structural diagram of the conversion device of the present utility model;
[0021] Figure 3 is the side view overall structural diagram of the conversion device of the present utility model.
[0022] In the figure: transformer 1; main valve body 2; connecting elbow 3; emergency drain port 4; first valve 5; second valve 6; self-sealing inflation joint 7; compound pressure gauge 8; buffer elbow 9; third valve 10; fourth valve 11; first oil circulation pipe 12; fifth valve 13; second oil circulation pipe 14; three-way pipe 15; four-way pipe 16. Detailed implementation mode
[0023] As Figures 1 to 3 shown, a device for converting the oil and gas operation process of a transformer, one end of the main valve body 2 is communicated with one end of the connecting elbow 3, the other end of the connecting elbow 3 is communicated with the lower end of the four-way pipe 16, a self-sealing inflation joint 7 is arranged at the upper end of the four-way pipe 16, one side of the four-way pipe 16 is communicated with the emergency drain port 4, a first valve 5 is arranged on the emergency drain port 4, the other side of the four-way pipe 16 is communicated with the three-way pipe 15, the two pipes of the three-way pipe 15 are respectively the first oil circulation pipe 12 and the second oil circulation pipe 14, and valves are arranged on both the first oil circulation pipe 12 and the second oil circulation pipe 14.
[0024] By controlling the second valve 6, the third valve 10, the fourth valve 11 and the fifth valve 13, the operator can efficiently and conveniently switch between the three key processes of vacuum pumping, filling with dry air, and hot oil circulation, without the need to frequently disassemble and reconnect the pipelines. The rapid switching of different operation processes avoids the cumbersome process of disassembling and assembling pipelines in the traditional method, significantly saves the operation preparation and switching time, and improves the overall work efficiency.
[0025] The connecting elbow 3 is used to connect the main valve body 2 and the four-way pipe 16, and its design allows the pipelines to be connected at different angles and positions, increasing the flexibility of the device.
[0026] The four-way pipe 16 has four openings, which are respectively connected to the connecting elbow 3, the self-sealing inflation joint 7, the emergency drain port 4 and the three-way pipe 15, realizing the integration of multiple functions.
[0027] The self-sealing inflation joint 7 is located at the upper end of the four-way pipe 16 and is used to connect a vacuum pump or a dry gas source for vacuum pumping or filling with dry gas.
[0028] In case of an emergency, the emergency drain port 4 can quickly release the pressure or liquid inside the transformer through this interface to ensure safety. A first valve 5 is arranged on the emergency drain port for controlling the opening and closing.
[0029] It is connected to the side of the four-way pipe 16, and its two branches are respectively connected to the first oil circulation pipe 12 and the second oil circulation pipe 14. Valves are arranged on both of these two pipes for controlling the circulation of hot oil.
[0030] In the preferred solution, internal threads are provided at both ends of the connecting elbow 3, and both ends of the connecting elbow 3 are threadedly connected to the main valve body 2 and the four-way pipe 16 respectively.
[0031] The threaded connection enables the connecting elbow 3 to be quickly connected to or separated from the main valve body 2 and the four-way pipe 16 without welding or other fixing methods, which greatly improves the flexibility and efficiency of on-site operations. The threaded connection can adapt to different sizes and types of pipe fittings. As long as the thread specifications match, the connection between different components can be achieved, increasing the compatibility and flexibility of the system.
[0032] In the preferred solution, a second valve 6 is provided between the self-sealing inflation joint 7 and the four-way pipe 16, and a compound pressure gauge 8 is also provided on the pipeline below the second valve 6.
[0033] The second valve 6 serves as a control point between the self-sealing inflation joint 7 and the four-way pipe 16, allowing the operator to precisely control the inflow or outflow of gas. When it is necessary to fill the transformer with dry air or inert gas, this valve can be opened; when it is necessary to evacuate or discharge gas, the valve is closed to ensure the safety and accuracy of the operation.
[0034] The compound pressure gauge 8 is located on the pipeline below the second valve 6 and is used to monitor the air pressure level in the four-way pipe 16 in real time. This is crucial for evacuation and inflation operations because it can help the operator determine whether the required vacuum degree or air pressure has been reached, thus avoiding overpressure or underpressure situations and ensuring the safety and stability of the internal environment of the transformer.
[0035] The self-sealing inflation joint 7 is designed with a self-sealing mechanism that automatically seals when not connected to the inflation device, preventing gas leakage and ensuring the airtightness and safety of the system in the non-operating state.
[0036] In the preferred solution, the compound pressure gauge 8 is connected to the four-way pipe 16 through a buffer elbow 9, and a third valve 10 is provided between the four-way pipe 16 and the buffer elbow 9.
[0037] The presence of the buffer elbow 9 is to slow down the pressure fluctuations of the air flow or oil flow in the four-way pipe 16, thereby protecting the compound pressure gauge 8 from sudden pressure changes. This design helps to improve the accuracy and stability of air pressure measurement and avoid measurement errors caused by fluid impact.
[0038] The third valve 10 serves as an isolation point, allowing the operator to close the valve to disconnect the compound pressure gauge 8 from the four-way pipe 16 when the air pressure does not need to be monitored. This not only protects the pressure gauge from damage in the non-operating state but also provides a safe isolation barrier during maintenance or replacement of the pressure gauge.
[0039] When the compound pressure gauge 8 needs to be calibrated, repaired, or replaced, the operator only needs to close the third valve 10, and then can safely perform maintenance work without disturbing the operation of other systems, improving the convenience and efficiency of equipment maintenance.
[0040] In a preferred embodiment, a fourth valve 11 and a fifth valve 13 are respectively provided on the first oil circulation pipe 12 and the second oil circulation pipe 14.
[0041] When oil circulation needs to be carried out through the first oil circulation pipe 12, the operator can open the fourth valve 11 and close the fifth valve 13 simultaneously to ensure that the oil only flows through the first oil circulation pipe. Vice versa, when the second oil circulation pipe 14 is needed, the fourth valve 11 should be closed and the fifth valve 13 should be opened.
[0042] The independent setting of each valve means that the oil circulation pipes can be operated separately, which is particularly useful when carrying out different types of oil circulation or maintaining one of the oil circulation pipes. For example, if the first oil circulation pipe 12 needs to be maintained, the fourth valve 11 can be closed while keeping the fifth valve 13 open to continue the oil circulation using the second oil circulation pipe 14.
[0043] In a preferred embodiment, oil pipe French connectors are provided at both ends of the first oil circulation pipe 12 and the second oil circulation pipe 14, or flange connection plates are provided. The four-way pipe 16 and the three-way pipe 15 are connected by a flange plate, and the four-way pipe 16 is connected to the connecting elbow 3 through a flange plate. A tetrafluoroethylene seal ring is provided inside the flange plate. The use of flange connection plates and French connectors enables the pipeline connection to follow industrial standards, facilitating the docking with other standard pipelines and equipment, and simplifying the on-site installation and maintenance process. Tetrafluoroethylene (PTFE) is a high-performance engineering plastic known for its excellent chemical corrosion resistance, low friction coefficient, and good thermal stability. As a seal ring, PTFE can ensure the tightness of the pipeline connection, preventing oil or gas leakage, which is particularly important for high-pressure or high-temperature working environments. The flange connection design facilitates disassembly and inspection, without the need to damage the pipeline, and the seal ring or other components can be easily replaced when needed, reducing the maintenance time and cost.
[0044] The above embodiments are only the preferred technical solutions of the present utility model and should not be regarded as a limitation to the present utility model. The protection scope of the present utility model should be the technical solutions recorded in the claims, including the equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, the equivalent replacement improvements within this scope are also within the protection scope of the present utility model.
Claims
1. A transformer oil and gas operation process conversion device, characterized in that: One end of the end part of the main valve body (2) is communicated with one end of the connecting elbow pipe (3), the other end of the connecting elbow pipe (3) is communicated with the lower end of the four-way pipe (16), a self-sealing inflation joint (7) is arranged at the upper end of the four-way pipe (16), one side of the four-way pipe (16) is communicated with the emergency evacuation port (4), a first valve (5) is arranged on the emergency evacuation port (4), the other side of the four-way pipe (16) is communicated with the three-way pipe (15), the two pipes of the three-way pipe (15) are respectively the first oil circulation pipe (12) and the second oil circulation pipe (14), and valves are arranged on both the first oil circulation pipe (12) and the second oil circulation pipe (14).
2. The transformer oil and gas operation process conversion device according to claim 1, characterized in that: Threads are arranged inside both ends of the connecting elbow pipe (3), and both ends of the connecting elbow pipe (3) are threadedly connected with the main valve body (2) and the four-way pipe (16) respectively.
3. The transformer oil-gas operation process conversion device according to claim 1, characterized in that: A second valve (6) is arranged between the self-sealing inflation joint (7) and the four-way pipe (16), and a compound pressure gauge (8) is further arranged on the pipe below the second valve (6).
4. The conversion device for transformer oil-gas operation process according to claim 3, characterized in that: The compound pressure gauge (8) is communicated with the four-way pipe (16) through a buffer elbow pipe (9), and a third valve (10) is arranged between the four-way pipe (16) and the buffer elbow pipe (9).
5. The transformer oil and gas operation process conversion device according to claim 1, characterized in that: A fourth valve (11) and a fifth valve (13) are respectively arranged on the first oil circulation pipe (12) and the second oil circulation pipe (14).
6. The transformer oil and gas operation process conversion device according to claim 1, characterized in that: Oil pipe French joints are arranged at the ends of both the first oil circulation pipe (12) and the second oil circulation pipe (14), or flange connection discs are arranged.
7. The transformer oil-gas operation process conversion device according to claim 1, characterized in that: The four-way pipe (16) and the three-way pipe (15) are connected by a flange plate, and the four-way pipe (16) is connected with the connecting elbow pipe (3) through the flange plate.
8. The transformer oil and gas operation process conversion device according to claim 7, characterized in that: A polytetrafluoroethylene sealing ring is arranged inside the flange plate.