An on-line monitoring device for a transformer

Abstract

The utility model discloses a transformer on -line monitoring device relates to transformer monitoring equipment field, including main radiator, and the main pipeline that is linked to main radiator input and output, the interval between main pipeline and main radiator is equipped with branch pipeline, and the branch pipeline end connects the auxiliary radiator, and the pressure sensor is established in the place between main radiator and branch pipeline of main pipeline, and the section of branch pipeline is equipped with electric control valve near auxiliary radiator, and two pressure sensors are electric connection with the electric control valve of same side through the external monitoring system respectively, and the specific position of main pipeline and branch pipeline outside still sets the inductive element and control valve of unified control, and the real -time data of inductive element is monitored, and the pressure value in the flowing process of current oil liquid is judged, thereby the opening amplitude of electric control valve is adjusted dynamically, thereby the liquid pressure in main pipeline is reduced between, guarantees that oil quality is not affected by pressure, reduces the working burden of liquid pump simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of transformer monitoring equipment, and in particular to an online transformer monitoring device. Background Technology

[0002] As a large piece of equipment, the operation and maintenance of transformers is particularly important. A key component to ensure their normal operation during routine use is the cooling system. As the transformer gradually heats up during operation, the oil inside the transformer carries the high temperature away from the transformer and flows into the external cooling components. After being cooled down, the oil returns to the transformer.

[0003] In actual use, the transformer cooling system is not continuously running. Instead, it is activated by pumping oil when needed. The oil encounters different resistances when entering and leaving the cooler, which causes pressure to be generated on the input side of the cooler. When this pressure is low, it will not directly affect the performance. However, when the transformer has a high heat dissipation requirement, the pressure here may increase.

[0004] Typically, a monitoring system is installed in the transformer's cooling system to sense pressure changes in real time and prevent the pressure from exceeding the threshold. In low-demand transformers, this pressure increase only affects the service life of the oil pump, as the pump may experience overload and accelerated wear due to pressure resistance. However, in high-demand transformers with special oils, this pressure directly affects the quality of the oil. The oil is already at a high temperature when it enters the cooler, and a sudden pressure increase at high temperatures may cause air in the precipitated oil to mix with the oil again, creating an oil-air mixture. This reduces the oil's insulation effect and directly endangers the transformer's operational safety. At the same time, under a sudden pressure increase, the oil flow rate near the input end of the cooler cannot achieve sufficient heat exchange to complete the cooling process, thus reducing the cooling effect of the oil. Utility Model Content

[0005] To address the aforementioned problems, the purpose of this invention is to provide an online transformer monitoring device that solves the problem of excessive local pressure during the oil circulation cooling process within the transformer.

[0006] The technical solution of this utility model is as follows: A transformer online monitoring device includes a main radiator and a main pipeline connecting the input and output ends of the main radiator. A secondary pipeline is provided between the main pipeline and the main radiator at intervals. The end of the secondary pipeline is connected to the secondary radiator. The main pipeline and the secondary pipeline are combined to form a T-shaped tee. The horizontal part is the main pipeline connecting to the main radiator, and the vertical part is the secondary pipeline connecting to the secondary radiator. The secondary pipeline is an L-shaped pipe. The vertical part of the secondary pipeline is connected to the main pipeline, and the bent part is connected to the secondary radiator, so that the secondary radiator forms a bypass component outside the main radiator through the secondary pipeline. A pressure sensor is installed on the main pipeline between the main radiator and the secondary pipeline. An electrically controlled valve is installed on the section of the secondary pipeline near the secondary radiator. The two pressure sensors are electrically connected to the electrically controlled valve on the same side through an external monitoring system.

[0007] Furthermore, both the main radiator and the auxiliary radiator are heat dissipation structures with internal fluid channels and external heat dissipation fins. The auxiliary radiator is provided with a connection interface for external connection to ensure the heat dissipation effect of the main radiator and the auxiliary radiator. At the same time, the auxiliary radiator can be connected to the outside to perform operations such as oil replacement or venting.

[0008] Furthermore, there are two pressure sensors, which are respectively installed on the main pipeline on the input side and the output side of the main radiator. Both pressure sensors are electrically connected to the monitoring system and are used to detect the fluid pressure difference between the input side and the output side of the main radiator. The monitoring system can measure the oil pressure on the input and output sides of the main radiator in real time. The pressure difference between the two is the real-time additional pressure on the input side of the main radiator. The monitoring system can also set a pressure threshold to trigger an emergency response, such as triggering the output power of the liquid pump.

[0009] Furthermore, the electrically controlled valve is an electrically controlled regulating valve. The electrically controlled valve is connected to a pressure sensor through a monitoring system and is linked with the pressure difference signal obtained from the pressure sensor. When the pressure difference signal is large, the opening range of the electrically controlled valve is large, and vice versa, forming a dynamic control system. It can adjust the opening range of the secondary pipeline in real time, thereby adaptively sharing the flow in the main pipeline and reducing the pressure in the main pipeline. Since the opening range of the electrically controlled valve is dynamically controlled, it can ensure that the liquid pressure in the main pipeline is always kept within the optimal value range.

[0010] Furthermore, the L-shaped secondary pipeline has a split structure, consisting of a vertical section connecting to the main pipeline and a bent section connecting to the secondary radiator. The bent section is hook-shaped and combines with the vertical section to form an L-shape. The connection is made through a flange structure, allowing the secondary radiator connected to the secondary pipeline to be removed at any time for replacement, maintenance, or sealing. This adapts to various usage scenarios without affecting the flow of oil in the main pipeline.

[0011] Furthermore, the main pipeline is connected to the main radiator via a flange structure. The input and output sides of the main radiator are respectively provided with outwardly extending connecting pipes. The flange structure is located at the end of the connecting pipe, so that the main pipeline can be blocked after the main radiator is removed. In special circumstances, the oil can be transported entirely through the secondary pipeline and a certain cooling effect can be guaranteed.

[0012] The beneficial effects of this utility model are as follows: 1. This utility model provides a new oil flow channel by setting a bypass outside the main oil flow pipeline. A unified control sensing element and control valve are also set at specific positions outside the main pipeline and the auxiliary pipeline. The pressure value of the oil during the flow process is judged by the real-time data monitored by the sensing element, thereby dynamically adjusting the opening degree of the electronically controlled valve. The opening of the valve can enable the oil in the main pipeline to obtain a new flow channel, thereby reducing the liquid pressure in the main pipeline and ensuring that the oil quality is not affected by the pressure, while reducing the workload of the liquid pump.

[0013] 2. This utility model also connects the main radiator and the auxiliary radiator to the pipeline through a flange structure. The special nature of the flange structure makes it highly convenient to disassemble and has a good sealing effect. At the same time, the flange can be quickly sealed, so that when the heat dissipation structure in the main pipeline needs maintenance, the auxiliary pipeline can replace the main pipeline to operate at low intensity, avoiding the need for the entire transformer to be shut down for a long time during the maintenance of the transformer's heat dissipation system. Attached Figure Description

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

[0015] Figure 2 This is a schematic diagram illustrating the connection effect between the main pipeline and the secondary pipeline of this utility model.

[0016] Attached reference numerals: 1. Main radiator; 2. Main pipeline; 3. Secondary pipeline; 4. Secondary radiator; 5. Pressure sensor; 6. Electrically controlled valve. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0018] like Figure 1-2As shown, an online transformer monitoring device includes a main radiator 1 and a main pipeline 2 connecting the input and output ends of the main radiator 1. A secondary pipeline 3 is provided between the main pipeline 2 and the main radiator 1, and the end of the secondary pipeline 3 is connected to a secondary radiator 4. Both the main radiator 1 and the secondary radiator 4 are heat dissipation structures with internal fluid channels and heat dissipation fins on the outer surface. The secondary radiator 4 is provided with a connection interface for external connection to ensure the heat dissipation effect of the main radiator 1 and the secondary radiator 4. At the same time, the secondary radiator 4 can be connected to the outside to perform operations such as oil replacement or venting. The main pipeline 2 is connected to the main radiator 1 through a flange structure. The input and output sides of the main radiator 1 are respectively provided with outwardly extending connecting pipes. The flange structure is located at the end of the connecting pipe, so that the main radiator 1 can be removed to block the main pipeline 2. In special cases, the oil can be transported completely through the secondary pipeline 3 and a certain cooling effect can be guaranteed. The main pipe 2 and the secondary pipe 3 are combined to form a T-shaped tee. The horizontal part is the main pipe 2 that connects to the main radiator 1, and the vertical part is the secondary pipe 3 that connects to the secondary radiator 4. The secondary pipe 3 is an L-shaped pipe. The vertical part of the secondary pipe 3 connects to the main pipe 2, and the bent part connects to the secondary radiator 4, so that the secondary radiator 4 forms a bypass component outside the main radiator 1 through the secondary pipe 3. The L-shaped secondary pipe 3 has a split structure, which is divided into a vertical part that connects to the main pipe 2 and a bent part that connects to the secondary radiator 4. The bent part is hook-shaped and combines with the vertical part to form an L-shape. The connection is made by a flange structure, so that the secondary radiator 4 connected to the secondary pipe 3 can be removed at any time for replacement, maintenance or sealing. It can adapt to various usage scenarios without affecting the flow of oil in the main pipe 2. Two pressure sensors 5 are installed on the main pipeline 2 between the main radiator 1 and the secondary pipeline 3. The pressure sensors 5 are installed on the main pipeline 2 on the input side and the output side of the main radiator 1, respectively. Both pressure sensors 5 are electrically connected to the monitoring system and are used to detect the fluid pressure difference between the input side and the output side of the main radiator 1. The monitoring system can measure the oil pressure on the input and output sides of the main radiator 1 in real time. The pressure difference between the two is the real-time additional pressure on the input side of the main radiator 1. The monitoring system can also set a pressure threshold to trigger emergency response, such as triggering the output power of the liquid pump. An electrically controlled valve 6 is installed on the section of the secondary pipeline 3 near the secondary radiator 4. Two pressure sensors 5 are electrically connected to the electrically controlled valve 6 on the same side through an external monitoring system. The electrically controlled valve 6 is an electrically controlled regulating valve. The electrically controlled valve 6 is connected to the pressure sensors 5 through the monitoring system and is linked with the pressure difference signal obtained by the pressure sensors 5. When the pressure difference signal is large, the opening range of the electrically controlled valve 6 is large, and vice versa, forming a dynamic control system. It can adjust the opening range of the secondary pipeline 3 in real time, thereby adaptively sharing the flow in the main pipeline 2, thereby reducing the pressure in the main pipeline 2. Since the opening range of the electrically controlled valve 6 is dynamically controlled, it can ensure that the liquid pressure in the main pipeline 2 is always kept within the optimal value range.

[0019] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A transformer online monitoring device, comprising a main radiator (1) and a main pipeline (2) connecting the input end and the output end of the main radiator (1), characterized in that: A secondary pipe (3) is provided between the main pipe (2) and the main radiator (1). The end of the secondary pipe (3) is connected to the secondary radiator (4). The main pipe (2) and the secondary pipe (3) are combined to form a T-shaped tee pipe. The horizontal part is the main pipe (2) connected to the main radiator (1), and the vertical part is the secondary pipe (3) connected to the secondary radiator (4). The secondary pipe (3) is an L-shaped pipe. The vertical part of the secondary pipe (3) is connected to the main pipe (2), and the bent part is connected to the secondary radiator (4), so that the secondary radiator (4) forms a bypass assembly outside the main radiator (1) through the secondary pipe (3). A pressure sensor (5) is provided on the main pipeline (2) between the main radiator (1) and the secondary pipeline (3). An electrically controlled valve (6) is provided on a section of the secondary pipeline (3) near the secondary radiator (4). The two pressure sensors (5) are electrically connected to the electrically controlled valve (6) on the same side through an external monitoring system.

2. The online transformer monitoring device according to claim 1, characterized in that: Both the main radiator (1) and the auxiliary radiator (4) are heat dissipation structures with internal fluid channels and external heat dissipation fins. The auxiliary radiator (4) is provided with a connection interface for external connection.

3. The online transformer monitoring device according to claim 1, characterized in that: There are two pressure sensors (5), which are respectively installed on the main pipeline (2) on the input side and the output side of the main radiator (1). Both pressure sensors (5) are electrically connected to the monitoring system and are used to detect the fluid pressure difference between the input side and the output side of the main radiator (1).

4. The online transformer monitoring device according to claim 3, characterized in that: The electrically controlled valve (6) is an electrically controlled regulating valve. The electrically controlled valve (6) is connected to the pressure sensor (5) through the monitoring system and is linked with the pressure difference signal obtained by the pressure sensor (5). When the pressure difference signal is large, the opening range of the electrically controlled valve (6) is large, and vice versa, thus forming a dynamic control system.

5. The online transformer monitoring device according to claim 1, characterized in that: The L-shaped secondary pipeline (3) is a split structure, consisting of a vertical section connecting the main pipeline (2) and a bent section connecting the secondary radiator (4). The bent section is hook-shaped and combined with the vertical section to form an L-shape. The connection is made through a flange structure.

6. The online transformer monitoring device according to claim 1, characterized in that: The main pipeline (2) is connected to the main radiator (1) by a flange structure. The input and output sides of the main radiator (1) are respectively provided with outwardly extending connecting pipes, and the flange structure is located at the end of the connecting pipe.

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