Intelligent transformer monitoring device

Abstract

The utility model relates to the technical field of transformers, and discloses an intelligent transformer monitoring device, which solves the problems in the background technology, and comprises a transformer monitoring device body, the transformer monitoring device body comprises a transformer body and a monitoring device body, the transformer monitoring device comprises a transformer monitoring device body, the transformer monitoring device body is sleeved with an outer shielding shell, an inner magnetic shielding layer is arranged between the transformer monitoring device body and the outer shielding shell, and the inner magnetic shielding layer is connected with the outer shielding shell through an insulating ceramic support. The influence of external and internal electromagnetic interference on the sensor can be effectively reduced, and the measurement precision and stability of the sensor are improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to transformer technical field, concretely is a kind of intelligent transformer monitoring device. BACKGROUND

[0002] As the core equipment in power system, transformer undertakes the important task of voltage conversion and power distribution, and its operating state is directly related to the stability of power grid and power supply reliability. In order to ensure the safe operation of transformer, its key parameters (such as oil level, temperature, vibration, partial discharge, etc.) need to be monitored in real time.

[0003] However, there are strong electromagnetic fields (such as high-frequency electromagnetic radiation on high-voltage side, magnetic field generated by large current) in the existing transformer operating environment, and traditional sensors are easily affected by electromagnetic interference, resulting in measurement data drift or failure. Therefore, we propose an intelligent transformer monitoring device. UTILITY MODEL CONTENT

[0004] In order to solve the problems raised in the background art, the utility model provides the following technical scheme: an intelligent transformer monitoring device, comprising a transformer monitoring device body, the transformer monitoring device body comprising a transformer body and a monitoring device body, the transformer monitoring device body is provided with an outer shielding shell, an inner magnetic shielding layer is arranged between the transformer monitoring device body and the outer shielding shell, and the inner magnetic shielding layer is connected with the outer shielding shell through an insulating ceramic support.

[0005] Preferably, the outer shielding shell comprises an upper half shell and a lower half shell, the upper half shell and the lower half shell are provided with connecting parts, and the connecting parts are connected by bolts. The split design facilitates installation and maintenance, and the bolt connection ensures the stability and detachability of the shell structure.

[0006] Preferably, the outer shielding shell is made of aluminum, the thickness of the outer shielding shell is ≥2mm, and the surface of the outer shielding shell is anodized. Aluminum is lightweight and has low cost, and is suitable as an electric field shielding material. Anodizing enhances the corrosion resistance and hardness of the shell surface.

[0007] Preferably, the inner magnetic shielding layer is a ring-shaped shielding cover made of nickel-iron alloy, and the inner magnetic shielding layer is provided with a strip-shaped hollow hole. Nickel-iron alloy has high magnetic permeability and is suitable for shielding low-frequency magnetic field. The strip-shaped hollow hole reduces weight and improves heat dissipation performance.

[0008] Preferably, the outer shielding shell is provided with a groove, and the groove is matched with the insulating ceramic support. The groove design ensures the precise positioning and fixation of the insulating ceramic support, and improves the assembly accuracy of the inner magnetic shielding layer and the outer shielding shell.

[0009] Preferably, the outer shielding shell is provided with a fan, an air outlet of the fan is connected with the inside through the outer shielding shell, the fan provides active heat dissipation, prevents the inside from being too high in temperature, and the through design of the air outlet ensures that the heat dissipation airflow directly acts on the inside equipment.

[0010] Compared with the prior art, the utility model has the beneficial effects that:

[0011] When working, when the external high-frequency electromagnetic wave reaches the surface of the outer shielding shell after the device is powered on, the aluminum material generates an induced current, the induced current generates a reverse magnetic field, cancels the external electromagnetic wave, thereby preventing the electromagnetic wave from entering the inside, realizes the electric field shielding, when the external low-frequency magnetic field reaches the inner magnetic shielding layer, the high magnetic permeability of the nickel-iron alloy guides the magnetic force line into the shielding cover inside, reduces the interference of the magnetic field on the inside equipment, realizes the magnetic field shielding, the insulating ceramic support blocks the electromagnetic interference conduction path, avoids the direct contact between the outer shielding shell and the inner magnetic shielding layer to form eddy current loss, the fan provides active heat dissipation, prevents the inside from being too high in temperature, when it is needed to replace the sensor or maintain, the detachable bolt separates the upper half shell and the lower half shell, after the maintenance is completed, the shell is reassembled, the sealing property and the shielding efficiency are ensured, the influence of the external and internal electromagnetic interference on the sensor is effectively reduced, and the measurement precision and stability of the sensor are improved. BRIEF DESCRIPTION OF DRAWINGS

[0012] The accompanying drawings are used to provide a further understanding of the utility model, and constitute a part of the specification, are used to explain the utility model together with embodiments of the utility model, and do not constitute the limitation to the utility model.In the drawings:

[0013] Fig. 1 It is the front view structural schematic diagram of the utility model as a whole;

[0014] Fig. 2 It is the partial structure schematic diagram of the utility model;

[0015] Fig. 3 It is the inner magnetic shielding layer structure schematic diagram of the utility model;

[0016] In the drawing: 1, transformer monitoring device body;2, outer shielding shell;3, upper half shell;4, lower half shell;5, bolt;6, inner magnetic shielding layer;7, insulating ceramic support;8, strip hollow hole;9, fan;10, connecting portion. DETAILED DESCRIPTION

[0017] Clearly and completely describe the technical scheme in the embodiments of the utility model with reference to the drawings in the embodiments of the utility model, obviously, the described embodiments are only some embodiments of the utility model, not all embodiments; based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without making creative labor belong to the range of the utility model protection.

[0018] By Figs. 1-3 The utility model discloses a transformer monitoring device body 1, transformer monitoring device body 1 includes transformer body and monitoring device body, transformer monitoring device body 1 is equipped with outer shield shell 2, and the inner magnetic shielding layer 6 is arranged between transformer monitoring device body 1 and outer shield shell 2, and the inner magnetic shielding layer 6 is connected with outer shield shell 2 through insulating ceramic support 7.

[0019] Outer shield shell 2 includes upper half shell 3 and lower half shell 4, and the connecting portion 10 is arranged on upper half shell 3 and lower half shell 4, and the connecting portion 10 is connected through bolt 5, and the split type design is convenient to install and maintain, and the bolt 5 connection ensures the stability and detachability of the shell structure.

[0020] Outer shield shell 2 is made of aluminum, and the thickness of outer shield shell 2 is greater than or equal to 2mm, and the surface of outer shield shell 2 is anodized, and the aluminum material is light in weight and low in cost, and is suitable as an electric field shielding material, and the anodizing treatment enhances the corrosion resistance and hardness of the shell surface.

[0021] The inner magnetic shielding layer 6 is a ring-shaped shielding cover made of nickel-iron alloy, and the strip-shaped hollow hole 8 is arranged on the inner magnetic shielding layer 6, and the nickel-iron alloy, such as permalloy, has high magnetic permeability and is suitable for shielding low-frequency magnetic fields, and the strip-shaped hollow hole reduces the weight and improves the heat dissipation performance.

[0022] Groove is arranged on outer shield shell 2, and the groove is matched with insulating ceramic support 7, and the groove design ensures the accurate positioning and fixing of insulating ceramic support 7, and improves the assembly accuracy of inner magnetic shielding layer 6 and outer shield shell 7.

[0023] Fan 9 is arranged on outer shield shell 2, and the air outlet of fan 9 penetrates outer shield shell 2 and is connected with the inside, and the fan provides active heat dissipation to prevent the inside temperature from being too high, and the air outlet penetration design ensures that the heat dissipation airflow directly acts on the internal equipment.

[0024] Working principle: when the device is powered on, the aluminum material generates an induced current when the external high-frequency electromagnetic wave reaches the surface of the outer shielding shell 2, and the induced current generates a reverse magnetic field to offset the external electromagnetic wave, thereby preventing the electromagnetic wave from entering the inside, realizing electric field shielding, when the external low-frequency magnetic field reaches the inner magnetic shielding layer 6, the high magnetic permeability of nickel-iron alloy guides the magnetic force line into the shielding cover inside, reduces the magnetic field interference to the internal equipment, realizes magnetic field shielding, the insulating ceramic support 7 blocks the electromagnetic interference conduction path, avoids the direct contact between the outer shielding shell 2 and the inner magnetic shielding layer 6 to form eddy current loss, the fan 9 provides active cooling to prevent the internal temperature from being too high, when the sensor needs to be replaced or maintained, the detachable bolt 5 separates the upper half shell 3 and the lower half shell 4, after maintenance is completed, the shell is reassembled to ensure the sealing performance and shielding effectiveness, effectively reducing the influence of external and internal electromagnetic interference on the sensor, improving the measurement accuracy and stability of the sensor.

[0025] It should be noted that the relational terms herein such as first and second and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0026] Although the embodiments of the present application have been shown and described, it should be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A smart transformer monitoring device comprising a transformer monitoring device body (1), characterized in that: The transformer monitoring device body (1) comprises a transformer body and a monitoring device body, an outer shielding shell (2) is arranged on the transformer monitoring device body (1), an inner magnetic shielding layer (6) is arranged between the transformer monitoring device body (1) and the outer shielding shell (2), and the inner magnetic shielding layer (6) is connected with the outer shielding shell (2) through an insulating ceramic support (7).

2. The intelligent transformer monitoring device of claim 1, wherein: The outer shielding shell (2) comprises an upper half shell (3) and a lower half shell (4), and the upper half shell (3) and the lower half shell (4) are both provided with connecting portions (10), and the connecting portions (10) are connected through bolts (5).

3. The intelligent transformer monitoring device of claim 2, wherein: The outer shielding shell (2) is made of aluminum, the thickness of the outer shielding shell (2) is greater than or equal to 2mm, and the surface of the outer shielding shell (2) is anodized.

4. The intelligent transformer monitoring device of claim 3, wherein: The inner magnetic shielding layer (6) is a ring-shaped shielding cover made of nickel-iron alloy, and the inner magnetic shielding layer (6) is provided with a strip-shaped hollow hole (8).

5. The intelligent transformer monitoring device of claim 4, wherein: The outer shielding shell (2) is provided with a groove, and the groove is matched with the insulating ceramic support (7).

6. The intelligent transformer monitoring device of claim 5, wherein: The outer shielding shell (2) is provided with a fan (9), and the air outlet of the fan (9) penetrates the outer shielding shell (2) and is connected with the inside.

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