Voltage transformer with shielding structure

Abstract

The utility model discloses a voltage transformer with a shielding structure, which relates to the technical field of voltage transformers and comprises a shell and a shielding component, the shielding component is arranged in the shell and comprises a silicon steel sheet fixedly connected to the bottom of the inner wall of the shell, a winding is fixedly connected onto the silicon steel sheet, and a red copper foil plate is fixedly connected in the shell. A red copper foil sleeve is fixedly connected to the shell, a shielding cover is fixedly connected to the inner side wall of the shell, and the red copper foil sleeve can guide magnetic lines, reduce magnetic leakage and interference of an external magnetic field on an internal magnetic field of the transformer, ensure uniform and stable magnetic field distribution and guarantee accuracy and stability of voltage conversion. Insulating layers are arranged between the winding and the silicon steel sheet and between the winding and the red copper foil sleeve, energy loss and equipment damage caused by abnormal current flowing are prevented, adverse effects of an iron core magnetic field on the winding are avoided, and the problem that the shielding effect of a simple single-layer metal shielding layer on complex and changeable electromagnetic interference is limited is solved.

Description

Technical Field

[0001] This utility model relates to the field of voltage transformer technology, specifically a voltage transformer with a shielding structure. Background Technology

[0002] As power systems evolve towards higher voltage, larger capacity, and smarter operation, the performance requirements for voltage transformers are becoming increasingly stringent. In smart grids, high-precision, real-time measurement and monitoring of power system voltage are essential for optimized control and fault diagnosis. Voltage transformers with shielded structures can effectively reduce electromagnetic interference, improve measurement accuracy, and meet the high voltage measurement demands of smart grids.

[0003] Existing voltage transformers employ simple shielding measures, such as setting a single-layer metal shield between windings. However, such shielding structures can only suppress interference in specific frequency bands to a certain extent, and their shielding effect is extremely limited against complex and ever-changing electromagnetic interference. Utility Model Content

[0004] The purpose of this invention is to provide a voltage transformer with a shielding structure to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a voltage transformer with a shielding structure, comprising:

[0006] shell;

[0007] A shielding assembly is placed inside a housing. The shielding assembly includes a silicon steel sheet fixedly connected to the bottom of the inner wall of the housing, a winding fixedly connected to the silicon steel sheet, a copper foil plate fixedly connected inside the housing, a copper foil sleeve fixedly connected to the housing, and a shielding cover fixedly connected to the inner side wall of the housing.

[0008] The ventilation duct is fixedly connected to the outer casing and to the copper foil plate.

[0009] Furthermore, a fan is fixedly connected to the ventilation duct, and the fan is fixedly connected to the outer wall of the outer casing.

[0010] The above technical solution involves a fan fixedly connected to the ventilation duct. When the fan is started, the ventilation duct can be used to dissipate heat from the copper foil sleeve. The outer shell of the ventilation duct can also serve as an additional electromagnetic shielding layer, which, in conjunction with the internal shielding structure, further enhances the shielding effect against external electromagnetic interference, reduces the impact of electromagnetic interference on the measurement accuracy and signal transmission of the voltage transformer, and improves the stability and reliability of the equipment.

[0011] Furthermore, two silicon steel sheets and two windings are provided, and the copper foil plate is fixedly connected between the two silicon steel sheets and the windings.

[0012] The above technical solution is adopted: by setting a copper foil plate to be fixedly connected between the two silicon steel sheets and the winding, the stray capacitance current generated by the electric field coupling between the primary winding and the secondary winding is reduced.

[0013] Furthermore, the winding and the silicon steel sheet are fixedly connected inside the copper foil sleeve.

[0014] The above technical solution involves using a copper foil sleeve to guide magnetic lines of force, reducing leakage flux and interference from external magnetic fields on the internal magnetic field of the transformer, ensuring a uniform and stable magnetic field distribution, and guaranteeing the accuracy and stability of voltage transformation.

[0015] Furthermore, the copper foil sleeve is slidably connected to the outer wall of the ventilation pipe.

[0016] The above technical solution is adopted: the ventilation duct, as an independent air channel, can provide a dedicated path for heat dissipation, allowing air to flow more orderly around the components and carry away heat. The iron structure of the ventilation duct can dissipate the heat conducted by the shielding components to the outside using a fan.

[0017] Furthermore, an insulating layer is fixedly connected between the winding and the silicon steel sheet, and between the winding and the copper foil sleeve.

[0018] The above technical solution aims to prevent the current in the winding from forming a loop through the iron core, which would cause energy loss and equipment damage. At the same time, it avoids the magnetic field of the iron core from having an adverse effect on the winding, thus ensuring the normal operation of the voltage transformer.

[0019] Furthermore, the two ends of the ventilation duct are fixedly connected to the two sides of the outer casing, and the fan is fixedly connected to one side of the outer casing.

[0020] The above technical solution is adopted: one side of the ventilation duct is fixedly connected to one side of the outer casing, and the other side is fixed to the fan. The fan is used to dissipate heat and ensure the airtightness of the outer casing.

[0021] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0022] In this invention, multiple shielding components, including a copper foil plate, a copper foil sleeve, and a shielding cover, work together with a ventilation duct to form a more comprehensive and effective shielding system. The ventilation duct, acting as an independent air channel, effectively dissipates heat from the internal components in conjunction with a fan, while ensuring heat dissipation and the airtightness of the outer casing to prevent external interference from entering due to heat dissipation damaging the seal. Placing the copper foil plate between the two silicon steel sheets and the winding effectively reduces stray capacitive current generated by electric field coupling between the primary and secondary windings, further improving measurement accuracy. The copper foil sleeve guides magnetic lines of force, reducing leakage flux and interference from external magnetic fields on the internal magnetic field of the transformer, ensuring a uniform and stable magnetic field distribution, and guaranteeing the accuracy and stability of voltage transformation. Insulating layers are placed between the winding and the silicon steel sheet, and between the winding and the copper foil sleeve, to prevent abnormal current flow from causing energy loss and equipment damage, and to avoid adverse effects of the iron core magnetic field on the winding, ensuring the normal operation of the voltage transformer. This solves the problem that simple single-layer metal shielding layers have limited shielding effectiveness against complex and variable electromagnetic interference. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of a voltage transformer with a shielding structure.

[0024] Figure 2 This is a schematic diagram showing the location of a voltage transformer with a shielded structure and a fan.

[0025] Figure 3 This is a schematic diagram showing the winding positions of a voltage transformer with a shielding structure.

[0026] Figure 4 This is a schematic diagram of the cross-sectional structure of the casing of a voltage transformer with a shielding structure.

[0027] Figure 5 This is a schematic diagram showing the position of the copper foil sleeve in a voltage transformer with a shielding structure.

[0028] Numbering on the map:

[0029] 1. Outer shell;

[0030] 2. Shielding assembly; 21. Winding; 22. Copper foil plate; 23. Silicon steel sheet; 24. Copper foil sleeve;

[0031] 3. Ventilation duct; 31. Fan. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0033] like Figures 1-5 As shown, this utility model provides a technical solution: a voltage transformer with a shielding structure, comprising:

[0034] Outer shell 1;

[0035] Shielding component 2 is placed inside the outer shell 1. Shielding component 2 includes a silicon steel sheet 23 fixedly connected to the bottom of the inner wall of the outer shell 1, a winding 21 fixedly connected to the silicon steel sheet 23, a copper foil plate 22 fixedly connected inside the outer shell 1, a copper foil sleeve 24 fixedly connected to the outer shell 1, and a shielding cover fixedly connected to the inner side wall of the outer shell 1.

[0036] Ventilation duct 3 is fixedly connected to outer casing 1 and to copper foil plate 22.

[0037] In this invention, before use, the contact points between the ventilation pipe 3 and the outer casing 1 are sealed tightly with potting compound. One side of the winding 21 is connected to the high-voltage power line transmitted from the substation via a series fuse, and the other side is connected to various measuring or controlling devices. By setting multiple shielding components 2 such as copper foil plate 22, copper foil sleeve 24, and shielding cover, a more comprehensive and effective shielding system is formed in conjunction with the ventilation pipe 3. The ventilation pipe 3, as an independent air channel, can effectively dissipate heat for the internal components in conjunction with the fan 31, and ensure the airtightness of the outer casing 1 while ensuring heat dissipation, preventing external interference from entering due to heat dissipation damaging the seal. The copper foil plate 22 is set on the two silicon steel sheets 23 and the winding 2. Between the primary winding 21 and the secondary winding 21, the stray capacitive current generated by electric field coupling can be effectively reduced, further improving measurement accuracy. The copper foil sleeve 24 can guide magnetic lines of force, reduce leakage magnetic field and interference of external magnetic field on the internal magnetic field of the transformer, ensure uniform and stable magnetic field distribution, and guarantee the accuracy and stability of voltage transformation. Insulation layers are set between the winding 21 and the silicon steel sheet 23 and between the winding 21 and the copper foil sleeve 24 to prevent abnormal current flow from causing energy loss and equipment damage, avoid adverse effects of the iron core magnetic field on the winding 21, and ensure normal operation of the voltage transformer. This solves the problem that the simple single-layer metal shielding layer has limited shielding effect on complex and variable electromagnetic interference.

[0038] Furthermore, such as Figures 1 to 5As shown, a fan 31 is fixedly connected to the ventilation pipe 3. The fan 31 is fixedly connected to the outer wall of the outer casing 1. By fixing the fan 31 to the ventilation pipe 3, when the fan 31 is started, the ventilation pipe 3 can be used to dissipate heat from the copper foil sleeve 24. The outer casing 1 of the ventilation pipe 3 can also serve as an additional electromagnetic shielding layer. In conjunction with the internal shielding structure, it can further enhance the shielding effect against external electromagnetic interference, reduce the impact of electromagnetic interference on the measurement accuracy and signal transmission of the voltage transformer, and improve the stability and reliability of the equipment.

[0039] Two silicon steel sheets 23 and two windings 21 are provided. A copper foil plate 22 is fixedly connected between the two silicon steel sheets 23 and the windings 21. By setting the copper foil plate 22 to be fixedly connected between the two silicon steel sheets 23 and the windings 21, the stray capacitance current generated by the electric field coupling between the primary winding 21 and the secondary winding 21 is reduced.

[0040] The winding 21 and the silicon steel sheet 23 are fixedly connected inside the copper foil sleeve 24. By setting the copper foil sleeve 24, the magnetic lines of force are guided, the leakage magnetic field and the interference of external magnetic field on the internal magnetic field of the transformer are reduced, ensuring that the magnetic field distribution is uniform and stable, and ensuring the accuracy and stability of voltage transformation.

[0041] The copper foil sleeve 24 is slidably connected to the outer wall of the ventilation duct 3. The ventilation duct 3, as an independent air channel, can provide a dedicated path for heat dissipation, allowing air to flow more orderly around the component and carry away heat. The iron structure of the ventilation duct 3 can dissipate the heat conducted by the shielding component 2 to the outside using the fan 31.

[0042] Insulation layers are fixedly connected between the winding 21 and the silicon steel sheet 23, and between the winding 21 and the copper foil sleeve 24, to prevent the current of the winding 21 from forming a circuit through the iron core, causing energy loss and equipment damage. At the same time, it avoids the magnetic field of the iron core from having an adverse effect on the winding 21, ensuring the normal operation of the voltage transformer.

[0043] The above solution also has the problem of not specifying the connection position between the ventilation pipe 3 and the outer casing 1, such as... Figures 1 to 2 As shown, the two ends of the ventilation pipe 3 are fixedly connected to the two sides of the outer casing 1, and the fan 31 is fixedly connected to one side of the outer casing 1. One side of the ventilation pipe 3 is fixedly connected to one side of the outer casing 1, and the other side is fixed to the fan 31. The fan 31 is used to dissipate heat and ensure the airtightness of the outer casing 1.

[0044] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present utility model. The implementation schemes in the above embodiments can also be further combined or replaced. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A voltage transformer with a shielding structure, characterized in that, Include: The shell (1); Shielding assembly (2), the shielding assembly (2) is placed in the shell (1), the shielding assembly (2) includes silicon steel sheet (23) fixedly connected in the inner wall bottom of shell (1), the silicon steel sheet (23) is fixedly connected with winding (21), the shell (1) is fixedly connected with purple copper foil plate (22), the shell (1) is fixedly connected with purple copper foil sleeve (24), the inner side wall of shell (1) is fixedly connected with shielding cover; Ventilation pipe (3), the ventilation pipe (3) is fixedly communicated with shell (1), the ventilation pipe (3) is fixedly communicated with purple copper foil plate (22).

2. The voltage transformer with a shielding structure according to claim 1, characterized in that: The fan (31) is fixedly connected on the ventilation pipe (3), and the fan (31) is fixedly connected to the outer side wall of the shell (1).

3. The voltage transformer with a shielding structure according to claim 1, characterized in that: The silicon steel sheet (23) and the winding (21) are provided with two, the purple copper foil plate (22) is fixedly connected between the two silicon steel sheets (23) and the winding (21).

4. The voltage transformer with a shielding structure according to claim 1, characterized in that: The winding (21) and the silicon steel sheet (23) are fixedly connected inside the purple copper foil sleeve (24).

5. The voltage transformer with a shielding structure according to claim 1, characterized in that: The purple copper foil sleeve (24) is slidably connected with the outer side wall of the ventilation pipe (3).

6. The voltage transformer with a shielding structure according to claim 1, characterized in that: The winding (21) and the silicon steel sheet (23) are fixedly connected with an insulating layer between the winding (21) and the silicon steel sheet (23).

7. The voltage transformer with a shielding structure according to claim 2, characterized in that: The two ends of the ventilation pipe (3) are fixedly connected on both sides of the shell (1), and the fan (31) is fixedly connected on one side of the shell (1).

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