Oil immersed transformer state monitoring device

Abstract

The utility model provides an oil immersed transformer state monitoring device, and belongs to the technical field of transformer state monitoring devices. Comprising a transformer box, a plurality of groups of iron cores and coils are installed in the transformer box, a first oil guide pipe and a second oil guide pipe are installed on the side wall of the transformer box, the first oil guide pipe and the second oil guide pipe are jointly connected with a cooling box, an air conditioner is installed at the top end of the cooling box, and the air conditioner is used for cooling insulating oil passing through the interior of the cooling box; the first oil guide pipe is used for guiding high-temperature insulating oil in the transformer box into the cooling box, and the second oil guide pipe is used for conveying the cooled insulating oil back into the transformer box. According to the utility model, high-temperature insulating oil which cannot be automatically adjusted in the transformer box is guided into the cooling box through the first oil guide pipe by arranging the first oil guide pipe and the second oil guide pipe, and then the cooled insulating oil is guided back into the transformer box again through the second oil guide pipe and the propeller, so that the transformer box is assisted in cooling.

Description

Technical Field

[0001] The utility model relates to the technical field of transformer state monitoring devices, in particular to an oil-immersed transformer state monitoring device. Background Art

[0002] The oil-immersed transformer is a new type of high-performance transformer with a more reasonable structure and better performance. Its three-dimensional wound core has three core columns arranged in an equilateral triangle, with no gaps in the magnetic circuit, tighter winding, and the three magnetic circuits are of the same length and the shortest. The cross-sectional area of ​​the core column is closer to a circle, so the performance is further improved, the loss is reduced, the noise is reduced, the three items are balanced, and the third harmonic component is reduced. This product is more suitable for urban and rural, industrial and mining enterprise power grid transformation, and is more suitable for combined transformers and prefabricated substation transformers.

[0003] Generally, a temperature-reducing device is installed on the oil-immersed transformer. When the temperature rises, the refrigeration device will circulate the oil to gradually reduce the surrounding temperature to a reasonable range. At the same time, the production of cold air or balanced air can reduce the temperature around the oil-immersed transformer to a certain extent.

[0004] In the prior art, during the long-term use of an oil-immersed transformer, the iron core and the coil will continuously generate heat. When the temperature inside the transformer is too high, the insulating oil inside the transformer will catch fire at high temperature. The oil-immersed type's own oil circulation cooling system has limitations. When the outdoor temperature is too high, the transformer cannot be adjusted in time through oil circulation, which may cause a fire in the transformer. Therefore, the present application provides an oil-immersed transformer status monitoring device to meet the needs. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide an oil-immersed transformer state monitoring device to solve the problem that when the iron core and the coil continuously generate heat and the internal temperature of the transformer is too high, the insulating oil inside the transformer will catch fire at high temperature, and the oil-immersed type has its own oil circulation cooling system, and when the outdoor temperature is too high, the transformer cannot be adjusted in time through oil circulation, thereby causing the transformer to catch fire.

[0006] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0007] A device for monitoring the state of an oil-immersed transformer comprises: a transformer box, a plurality of groups of iron cores and coils are installed inside the transformer box, a first oil guide pipe and a second oil guide pipe are installed on the side wall of the transformer box, the first oil guide pipe and the second oil guide pipe are commonly connected to a cooling box, an air conditioner is installed on the top of the cooling box, and the air conditioner is used to cool the insulating oil passing through the cooling box; the first oil guide pipe is used to guide the insulating oil with high temperature inside the transformer box into the cooling box, and the second oil guide pipe is used to transport the cooled insulating oil back to the transformer box.

[0008] Preferably, a first through groove and a second through groove are provided on the side wall of the transformer box, the first through groove is connected to the end of the first oil pipe away from the cooling box, and the second through groove is connected to the end of the second oil pipe away from the cooling box, and electric valves are respectively installed in the first through groove and the second through groove, and the electric valves are used to close or open the first through groove and the second through groove.

[0009] Preferably, a temperature sensor is installed on the side of the transformer box close to the cooling box, and the detection end of the temperature sensor passes through the side wall of the transformer box and is close to the first through groove. The temperature sensor is configured to control the opening of the electric valve when the temperature of the insulating oil inside the transformer box is too high for a long time, so that the hot oil enters the cooling box through the first oil conduit, and then enters the transformer box through the second oil conduit.

[0010] Preferably, heat sinks are installed on the side walls around the transformer box, and the heat sinks are used to discharge the heat inside the transformer so that the transformer box always maintains a suitable temperature.

[0011] Preferably, the cooling box is connected to a bracket, and a support leg is connected to the top of the bracket, and the support leg is used to support and fix the cooling box and the air conditioner.

[0012] Preferably, a propeller is installed on the side of the second oil guide pipe close to the cooling box, and the propeller is used to push the insulating oil inside the cooling box into the transformer box.

[0013] Preferably, a driving motor is installed at the top of the air cooler, and the driving motor is used to drive the air cooler and the propeller.

[0014] Compared with the prior art, the utility model has at least the following beneficial effects:

[0015] In the above scheme, the high-temperature insulating oil inside the transformer box that cannot adjust itself is introduced into the cooling box through the first oil pipe by setting the first oil pipe, and then the cooled insulating oil is re-guided back to the inside of the transformer box through the second oil pipe and the thruster, thereby assisting the transformer box in cooling down; at the same time, a temperature sensor and an electric valve are set. When the temperature sensor senses that the temperature inside the transformer box remains high for a long time, the electric valve is promptly controlled to open to complete the external oil circulation to cool down the oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, further serve to explain the principles of the present disclosure and to enable those skilled in the relevant art to make and use the present disclosure.

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 It is a front view of the transformer box in the utility model;

[0019] Figure 3 It is a structural schematic diagram of the cooling box and the oil guide pipe in the utility model.

[0020] [Reference Signs]

[0021] 1. Transformer box; 2. First oil pipe; 3. Second oil pipe; 4. Cooling box; 5. Air conditioner; 6. First slot; 7. Second slot; 8. Electric valve; 9. Temperature sensor; 10. Heat sink; 11. Bracket; 12. Support leg; 13. Propeller; 14. Drive motor.

[0022] As shown in the figure, in order to clearly implement the structure of the embodiment of the utility model, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the utility model to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments, and the adjustments or modifications made are still included in the scope of the attached claims. DETAILED DESCRIPTION

[0023] The following is a detailed description of an oil-immersed transformer condition monitoring device provided by the utility model in combination with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternative methods to implement some known technologies; and the accompanying drawings are only for a more specific description of the embodiments, and are not intended to specifically limit the utility model.

[0024] Embodiment 1: Figures 1 to 3 As shown, an embodiment of the utility model provides an oil-immersed transformer state monitoring device, comprising: a transformer box 1, a plurality of groups of iron cores and coils are installed inside the transformer box 1, a first oil guide pipe 2 and a second oil guide pipe 3 are installed on the side wall of the transformer box 1, the first oil guide pipe 2 and the second oil guide pipe 3 are commonly connected to a cooling box 4, an air conditioner 5 is installed on the top of the cooling box 4, and the air conditioner 5 is used to cool the insulating oil passing through the cooling box 4; the first oil guide pipe 2 is used to guide the insulating oil with a high temperature inside the transformer box 1 into the cooling box 4, and the second oil guide pipe 3 is used to transport the cooled insulating oil back to the transformer box 1.

[0025] like Figure 2 As shown, a first through groove 6 and a second through groove 7 are provided on the side wall of the transformer box 1. The first through groove 6 is connected to the end of the first oil guide pipe 2 away from the cooling box 4, and the second through groove 7 is connected to the end of the second oil guide pipe 3 away from the cooling box 4. Electric valves 8 are respectively installed in the first through groove 6 and the second through groove 7. The electric valves 8 are used to close or open the first through groove 6 and the second through groove 7.

[0026] like Figure 1 and Figure 2 As shown, a temperature sensor 9 is installed on the side of the transformer box 1 close to the cooling box 4. The detection end of the temperature sensor 9 passes through the side wall of the transformer box 1 and is close to the first through groove 6. The temperature sensor 9 is configured to control the opening of the electric valve 8 when the temperature of the insulating oil inside the transformer box 1 is too high for a long time, so that the hot oil enters the cooling box 4 through the first oil guide pipe 2, and then enters the transformer box 1 through the second oil guide pipe 3.

[0027] like Figure 1 and Figure 2 As shown, heat sinks 10 are installed on the four side walls of the transformer box 1. The heat sinks 10 are used to discharge the heat inside the transformer so that the transformer box 1 always maintains a suitable temperature.

[0028] Embodiment 2: Figure 1 As shown, the cooling box 4 is connected to a bracket 11, and the top of the bracket 11 is connected to a support leg 12, which is used to support and fix the cooling box 4 and the air conditioner 5; the oil-immersed transformer is applicable to complex occasions. If it is on the ground, the support leg 12 can be inserted into the ground to increase the stability of the bracket 11. If it is a flat occasion, it can be placed directly to maintain stability.

[0029] like Figure 2 and Figure 3 As shown, a propeller 13 is installed on the side of the second oil guide pipe 3 close to the cooling box 4, and the propeller 13 is used to push the insulating oil inside the cooling box 4 into the transformer box 1; the working principle of the propeller 13 is mainly to increase the driving force inside the second oil guide pipe 3 of the box, so that the insulating oil inside the cooling box 4 is pushed into the transformer box 1.

[0030] like Figures 1 to 3 As shown, a driving motor 14 is installed at the top of the air cooler 5, and the driving motor 14 is used to drive the air cooler 5 and the propeller 13; the driving motor 14 provides kinetic energy for the air cooler 5 to generate cold air and the propeller 13 to push the insulating oil inside the second oil guide pipe 3.

[0031] The technical solution provided by the utility model is that when using the oil-immersed transformer, the oil-immersed transformer is first moved to a suitable position, and then the first oil guide pipe 2 is inserted into the first through groove 6 to form a card and connection, and similarly the second oil guide pipe 3 is inserted into the second through groove 7 to form a card and connection, and then the bracket 11 is fixed at a suitable position, and the oil-immersed transformer and its state monitoring device are installed; when it starts to be used, when the temperature of the insulating oil inside the oil-immersed transformer receives a long-term high temperature signal through the temperature sensor 9, the electric control valve in the first through groove 6 is opened by manual control, so that the high-temperature insulating oil enters the first oil guide pipe 2, and then is introduced into the cooling box 4, and at the same time, the switch of the air conditioner 5 is turned on to cool the insulating oil entering the cooling box 4, and then the electric valve 8 of the second through groove 7 is opened, and under the action of the propeller 13, the cooled insulating oil enters the inside of the transformer box 1, so that the temperature inside the transformer box 1 is steadily reduced, thereby realizing the state monitoring of the oil-immersed transformer box 1.

[0032] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the above preferred embodiments of the present invention, and those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0033] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A state monitoring device for an oil-immersed transformer, characterized in that: include: A transformer box (1), wherein a plurality of groups of iron cores and coils are installed inside the transformer box (1), a first oil guide pipe (2) and a second oil guide pipe (3) are installed on the side wall of the transformer box (1), the first oil guide pipe (2) and the second oil guide pipe (3) are connected to a cooling box (4), an air cooler (5) is installed on the top of the cooling box (4), and the air cooler (5) is used to cool the insulating oil passing through the cooling box (4); The first oil guide pipe (2) is used to guide the insulating oil with a high temperature inside the transformer box (1) into the cooling box (4), and the second oil guide pipe (3) is used to transport the insulating oil after cooling back into the transformer box (1); The transformer box (1) has a side wall provided with a first through groove (6) and a second through groove (7); the first through groove (6) is connected to an end of the first oil guide pipe (2) away from the cooling box (4); the second through groove (7) is connected to an end of the second oil guide pipe (3) away from the cooling box (4); electric valves (8) are respectively installed in the first through groove (6) and the second through groove (7); the electric valves (8) are used to close or open the first through groove (6) and the second through groove (7).

2. The state monitoring device according to claim 1, characterized in that: A temperature sensor (9) is installed on the side of the transformer box (1) close to the cooling box (4). The detection end of the temperature sensor (9) passes through the side wall of the transformer box (1) and is close to the first through groove (6). The temperature sensor (9) is configured to control the opening of the electric valve (8) when the temperature of the insulating oil inside the transformer box (1) is too high for a long time, so that the hot oil enters the cooling box (4) through the first oil guide pipe (2) and then enters the transformer box (1) through the second oil guide pipe (3).

3. The state monitoring device according to claim 1, characterized in that: The transformer box (1) is provided with heat sinks (10) on all four side walls thereof, and the heat sinks (10) are used to discharge heat from inside the transformer, so that the transformer box (1) always maintains a suitable temperature.

4. The state monitoring device according to claim 1, characterized in that: The cooling box (4) is connected to a bracket (11), and a top end of the bracket (11) is connected to a support leg (12), and the support leg (12) is used to support and fix the cooling box (4) and the air conditioner (5).

5. The state monitoring device according to claim 1, characterized in that: A propeller (13) is installed on the side of the second oil guide pipe (3) close to the cooling box (4), and the propeller (13) is used to push the insulating oil inside the cooling box (4) into the transformer box (1).

6. The state monitoring device according to claim 1, characterized in that: A driving motor (14) is installed at the top of the air cooler (5), and the driving motor (14) is used to drive the air cooler (5) and the propeller (13).

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