Metering voltage transformer with self-supporting integrated shell structure

Abstract

The utility model provides a metering voltage transformer with a self-supporting integrated shell structure, and relates to the technical field of transformers. The metering voltage transformer with the self-supporting integrated shell structure comprises a shell, a plurality of insulating towers and a plurality of wire cores, a double-layer insulating structure is arranged in the shell, and the inner side of the double-layer insulating structure is filled with insulating gas; the plurality of insulating towers are fixedly connected to the surface of the shell; the plurality of wire cores are uniformly and fixedly connected to the inner layer of the double-layer insulation structure in the shell; the inner layer of the double-layer insulation structure in the shell is also uniformly provided with a plurality of turbulent flow structures, the double-layer insulation structure in the shell is utilized to realize a better sealing effect on the interior of the shell, meanwhile, the turbulent flow structures in the inner layer of the double-layer insulation structure are utilized to play a better guiding effect on convection of airflow, and the heat dissipation effect of the wire core is enhanced.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of mutual inductors, in particular to a metering voltage mutual inductor with a self-supporting integrated shell structure. BACKGROUND

[0002] In the prior art, for example, a gas insulation integrated combined mutual inductor disclosed in CN209087568U comprises a shell, a current mutual inductor and a voltage mutual inductor, the shell is made of metal material, and the shell surrounds an internal cavity; the current mutual inductor comprises a first coil group; the voltage mutual inductor comprises a second coil group; the first coil group and the second coil group are arranged in the internal cavity; and insulation gas is arranged in the internal cavity.

[0003] The scheme can realize self-recovery after product discharge breakdown insulation, effectively reduces the maintenance cost, and can quickly dissipate heat of the mutual inductor, thereby greatly enhancing the insulation performance of the combined mutual inductor.

[0004] However, in the scheme, the insulation gas is directly injected into the shell, and it cannot be guaranteed that the shell will not leak after aging. Once the insulation gas leaks, it will not form effective insulation and heat dissipation effect. In addition, although the gas convection can be realized in the case of uneven heat, the gas convection effect is not obvious. CONTENT OF THE INVENTION

[0005] The application aims to solve at least one of the technical problems in the prior art. To this end, the application provides a metering voltage mutual inductor with a self-supporting integrated shell structure, which aims to improve the problem that the existing gas insulation integrated combined mutual inductor cannot avoid insulation gas leakage and the convection heat dissipation effect is not obvious.

[0006] The application provides a metering voltage mutual inductor with a self-supporting integrated shell structure, which comprises a shell, a plurality of insulation towers and a plurality of cores, the shell is provided with a double-layer insulation structure, the inside of the double-layer insulation structure is filled with insulation gas; the plurality of insulation towers are fixedly connected to the surface of the shell; the plurality of cores are uniformly fixedly connected to the inner layer of the double-layer insulation structure in the shell; and the inner layer of the double-layer insulation structure in the shell is also uniformly provided with a plurality of turbulence structures.

[0007] According to the metering voltage mutual inductor with a self-supporting integrated shell structure provided by the application, the double-layer insulation structure in the shell can realize better sealing effect on the inside of the shell, and the plurality of turbulence structures in the inner layer of the double-layer insulation structure can better guide the convection of the airflow, thereby enhancing the heat dissipation effect of the cores.

[0008] In addition, the metering voltage transformer with the self-supporting integrated shell structure according to the embodiment of the application further has the following additional technical features.

[0009] In some specific embodiments of the application, the shell is integrally formed, and the shell is embedded with an integrally formed inner shell.

[0010] In some specific embodiments of the application, the inner shell divides the cavity in the shell into an inner layer and an outer layer, the shell and the inner shell are filled with a solid insulation layer, and the inner side of the inner shell is filled with insulation gas.

[0011] In some specific embodiments of the application, one side of the shell is provided with an air inlet nozzle and an air outlet nozzle, the air inlet nozzle and the air outlet nozzle are respectively connected to the inside of the inner shell after penetrating through the shell, the solid insulation layer and the inner shell.

[0012] In some specific embodiments of the application, a plurality of the turbulence structures are uniformly fixed to the inner wall of the inner shell in the circumferential direction, and the turbulence structures are located at the center of the inner wall of the inner shell.

[0013] In some specific embodiments of the application, the turbulence structure is a turbulence block, and the turbulence block is arranged in the up-down and left-right directions in the inner shell.

[0014] In some specific embodiments of the application, the turbulence block is arranged in a strip shape, and the cross section of the strip-shaped turbulence block is triangular.

[0015] In some specific embodiments of the application, the two faces of the turbulence block away from the inner wall of the inner shell are arranged as symmetrical arc faces. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the application, and therefore should not be regarded as a limitation to the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor.

[0017] Figure 1 is a schematic diagram of the overall structure of a metering voltage transformer with a self-supporting integrated shell structure according to the embodiment of the application;

[0018] Figure 2 is a schematic diagram of the internal structure of a metering voltage transformer with a self-supporting integrated shell structure according to the embodiment of the application;

[0019] Figure 3This is a partial structural cross-sectional view of a metering voltage transformer with a self-supporting integrated housing structure according to an embodiment of this application.

[0020] Icons: 1. Outer shell; 11. Solid insulation layer; 12. Inner shell; 13. Air inlet; 14. Air outlet; 2. Insulation tower; 3. Wire core; 4. Turbine block; 41. Curved surface. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, not all of them. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] like Figures 1-3 As shown, a self-supporting integrated housing structure metering voltage transformer according to an embodiment of this application includes a housing 1, multiple insulating towers 2, and multiple conductors 3. The housing 1 has a double-layer insulation structure, and the inner side of the double-layer insulation structure is filled with insulating gas. The multiple insulating towers 2 are fixed to the surface of the housing 1. The tower-shaped design of the insulating towers 2 can extend the surface path, prevent electric arcs and leakage, and improve insulation capacity. In addition, the design of the umbrella skirt can reduce the accumulation of pollutants such as dust and moisture, reduce the risk of pollution, and the inclined design of the umbrella skirt helps drainage and prevents moisture from forming a continuous conductor path along the surface. The multiple conductors 3 are uniformly fixed to the inner layer of the double-layer insulation structure inside the housing 1. The inner layer of the double-layer insulation structure inside the housing 1 is also uniformly provided with multiple turbulence structures.

[0023] It should be noted that a coil is wound around wire core 3.

[0024] It should be further noted that the structure and principle of voltage transformers are common knowledge in the prior art, and there is no improvement to their structure and principle in this application. Therefore, the specific structure and working principle of voltage transformers will not be described in detail here.

[0025] The outer shell 1 is integrally formed, and an integrally formed inner shell 12 is embedded inside the outer shell 1. The inner shell 12 divides the cavity inside the outer shell 1 into inner and outer double layers. A solid insulating layer 11 is filled between the outer shell 1 and the inner shell 12, and insulating gas is filled inside the inner shell 12 to form the above-mentioned double-layer insulating structure.

[0026] It is understandable that the design of the solid insulation layer 11 and the inner shell 12 further ensures the sealing of the outer shell 1, that is, further ensures that the insulating gas inside the inner shell 12 is not prone to leakage, and together with the outer shell 1, forms a triple sealing protection for the insulating gas.

[0027] It should be noted that the solid insulating layer 11 can be filled with resin material.

[0028] like Figure 1 and Figure 2 As shown, an air inlet 13 and an air outlet 14 are provided on one side of the outer shell 1. The air inlet 13 and the air outlet 14 pass through the outer shell 1, the solid insulation layer 11 and the inner shell 12 respectively and are connected to the inside of the inner shell 12. Thus, even if there is a leakage of insulating gas, insulating gas can be replenished into the inner shell 12 through the air inlet 13 and the air outlet 14 can discharge the insulating gas to the outside to control the pressure inside the inner shell 12.

[0029] Example 1, such as Figure 2 and Figure 3 As shown, multiple flow-disrupting structures are uniformly fixed to the inner wall of the inner shell 12 in a circumferential direction. The flow-disrupting structures are located at the center of the inner wall of the inner shell 12. Specifically, the flow-disrupting structure is a flow-disrupting block 4, such as... Figure 3 As shown, the turbulence block 4 is arranged in the up, down, left and right directions inside the inner shell 12. The turbulence block 4 is arranged in a strip shape, and the cross-section of the strip-shaped turbulence block 4 is triangular. The two sides of the turbulence block 4 away from the inner wall of the inner shell 12 are set as symmetrical arc-shaped surfaces 41.

[0030] Therefore, it can be seen that once a certain core 3 inside is overheated, the insulating gas around it will expand due to the heat, which will create airflow convection within the inner shell 12. Under the action of multiple baffles 4 arranged in the up, down, left, and right directions within the inner shell 12, the airflow will be guided by the baffles 4 during the convection process and will have a certain impact with the insulating gas in the middle area of ​​the inner shell 12. This will enhance the convection effect of the insulating gas throughout the inner shell 12. At the same time, the design of the arc-shaped surface 41 further promotes the flow and mixing effect of the convective airflow, thus further enhancing the heat dissipation effect of the core 3.

[0031] In Example 2, in Example 1, the turbulence block 4 can also have grooves of irregular depth (not shown in the figure) set on the two arc surfaces 41 along its length direction. The grooves are set along the width direction of the turbulence block 4. In this way, the mixing degree of convection formed after the insulating gas expands due to heat can be further enhanced, and the heat dissipation effect of the insulating gas convection on the wire core 3 can be further improved.

[0032] It should be noted that the specific models and specifications of the solid insulation layer 11, air inlet 13, air outlet 14, insulation tower 2 and wire core 3 need to be selected and determined according to the actual specifications of the device. The specific selection calculation method adopts the existing technology in this field, so it will not be described in detail.

[0033] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A self-supporting integrated enclosure structure of a measuring voltage transformer, characterized by, Include: The shell (1) is provided with a double-layer insulation structure inside, and the inner side of the double-layer insulation structure is filled with insulating gas; A plurality of insulation towers (2) are fixed to the surface of the shell (1); A plurality of wire cores (3) are uniformly fixed to the inner layer of the double-layer insulation structure inside the shell (1); The inner layer of the double-layer insulation structure inside the shell (1) is also uniformly provided with a plurality of turbulence structures.

2. A self-supporting integrated enclosure structure's voltage transformer as claimed in claim 1, characterized in that, The shell (1) is integrally formed, and the shell (1) is embedded with an integrally formed inner shell (12).

3. A self-supporting integrated enclosure structure voltage transformer as claimed in claim 2, wherein, The inner shell (12) divides the cavity in the shell (1) into an inner and outer double layer, and the shell (1) and the shell (1) are filled with a solid insulation layer (11), and the insulating gas is filled in the inner side of the inner shell (12).

4. A self-supporting integrated enclosure structure voltage transformer as claimed in claim 3, wherein, One side of the shell (1) is provided with an air inlet nozzle (13) and an air outlet nozzle (14), and the air inlet nozzle (13) and the air outlet nozzle (14) are respectively communicated with the inside of the inner shell (12) after penetrating the shell (1), the solid insulation layer (11) and the inner shell (12).

5. A self-supporting integrated enclosure structure's voltage transformer as claimed in claim 2, wherein, A plurality of turbulence structures are circumferentially and uniformly fixed to the inner wall of the inner shell (12), and the turbulence structures are located at the center of the inner wall of the inner shell (12).

6. A self-supporting integrated enclosure structure's voltage transformer as claimed in claim 2, wherein, The turbulence structure is a turbulence block (4), which is arranged in the up-down-left-right direction in the inner shell (12).

7. A self-supporting integrated enclosure structure voltage transformer as claimed in claim 6, wherein, The turbulence block (4) is arranged in a strip shape, and the cross section of the strip-shaped turbulence block (4) is triangular.

8. A self-supporting integrated enclosure structure voltage transformer as claimed in claim 6, wherein, The two faces of the turbulence block (4) away from the inner wall of the inner shell (12) are provided as symmetrical arc faces (41).

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