Transformer magnetic bias suppression device based on magnetic shielding structure

Abstract

The magnetic shielding structure-based transformer magnetic bias suppression device comprises a box body structure, a pyramid cover is mounted at the top of an inner cavity of the box body structure, a circulating hole is formed in the bottom of the inner wall of the pyramid cover, and an annular body is mounted in the middle of the bottom of the pyramid cover in a butt joint manner; an inclined bottom sealing structure is arranged at the bottom of an inner cavity of the annular body, a leakage hole structure is formed in the lowest position of the bottom sealing structure, and a concentric-square-shaped pipe is arranged in the inner cavity of the box body structure and located below the pyramid cover. According to the transformer magnetic bias suppression device based on the magnetic shielding structure, rainwater is collected and flows in the internal space of the magnetic bias suppression device, and under the condition that the internal space of the magnetic bias suppression device is dry, the heat dissipation and cooling effects of the magnetic bias suppression device are improved through liquid in the external environment; and the defect that in the prior art, external rainwater is not used for heat exchange and heat dissipation is effectively overcome.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of transformer magnetic bias suppression device, in particular to a transformer magnetic bias suppression device based on magnetic shielding structure. BACKGROUND

[0002] With the rapid development of DC power transmission technology in China, the system debugging, equipment failure or maintenance at the initial stage of DC power transmission system construction, etc. make it almost impossible to avoid the monopolar ground return mode or bipolar unbalanced mode operation of the DC system. When the DC system operates in monopolar ground return mode or bipolar unbalanced mode, the DC current as high as several thousand amperes in the system is injected into the ground through the grounding electrode. When the DC current flows through the transformer neutral point of the grounding transformer and flows through the transformer winding, it will cause the DC bias of the transformer magnetic circuit, resulting in excessive noise and overheating of the main transformer, and even damage the transformer and threaten the safe and stable operation of the power system. Therefore, the magnetic bias suppression device is used to solve the above problems of the transformer in use.

[0003] The existing transformer magnetic bias suppression device is installed in the form of a box near the transformer. When the magnetic bias suppression device works, not only the internal components will generate a large amount of heat, but also the external environment will increase the internal heat of the magnetic bias suppression device. Therefore, the temperature inside the magnetic bias suppression device is very high during use. The existing technology solves this problem by using air cooling, which uses natural wind in the external environment and a fan device installed inside the magnetic bias suppression device to achieve the purpose. In actual use, the existing magnetic bias suppression device is almost not used for external rainwater in order to ensure the dryness inside, and various rainproof structures are used to block the external rainwater. Even if the magnetic bias suppression device uses water cooling, it does not use natural rainwater, but uses an internal water circulation system to achieve the purpose.

[0004] Therefore, we propose a transformer magnetic bias suppression device based on magnetic shielding structure, which utilizes natural rainwater to achieve the function and purpose of heat exchange inside the magnetic bias suppression device. SUMMARY

[0005] The purpose of the present application is to provide a transformer magnetic bias suppression device based on magnetic shielding structure to solve the problems raised in the background art.

[0006] To achieve the above purpose, the present application provides the following technical scheme: A transformer bias suppression device based on a magnetic shielding structure includes a housing structure. A pyramidal cover is installed on the top of the inner cavity of the housing structure. A flow hole is opened at the bottom of the inner wall of the pyramidal cover. An annular body is installed at the middle of the bottom of the pyramidal cover. An inclined bottom sealing structure is provided at the bottom of the inner cavity of the annular body. A leakage hole structure is opened at the lowest point of the bottom sealing structure. A U-shaped tube is provided in the inner cavity of the housing structure below the pyramidal cover.

[0007] Preferably, a support rod is threaded onto the outer wall of the pyramidal cover, and a lifting ring structure is fixedly installed at the bottom of the support rod.

[0008] Preferably, the loop-shaped tube is mainly assembled from branch pipes and bend pipe structures, and the loop-shaped tube is inserted into the inner ring of the lifting ring structure. One end of the loop-shaped tube is installed at the bottom of the ring body and is located directly below the leakage hole structure. The other end of the loop-shaped tube penetrates the box structure and extends to the outside of the box structure. The cavity area of ​​the ring body is located directly below the flow hole, and the two are connected.

[0009] Preferably, a protective plate is fixedly installed on the top of the box structure, and a strip-shaped opening structure for rainwater and air circulation is provided on the side of the protective plate.

[0010] Preferably, a sealing plug is installed through the middle of the pyramidal cover, a bearing shaft structure is installed in the middle of the sealing plug, and a vertical shaft is installed in the inner ring of the bearing structure.

[0011] Preferably, a bottom fan blade, a middle fan blade, and a top fan blade are installed sequentially from bottom to top on the outer ring of the vertical shaft. The bottom fan blade is located in the inner cavity of the box structure and at the bottom of the pyramidal cover. The middle fan blade is located in the inner cavity of the pyramidal cover, and the top fan blade is located on the outer side of the top of the bias suppression device.

[0012] Preferably, the strip-shaped opening structure faces upward, an inclined plate is installed in the inner cavity of the strip-shaped opening structure, and a guide strip is provided on the top of the inclined plate.

[0013] Preferably, the width of the inclined plate is greater than the width of the strip-shaped opening structure, and the inclined plate penetrates the strip-shaped opening structure and extends to the outside of the protective plate. The guide strip is specifically a convex-shaped structure, and guide grooves for concentrating and guiding rainwater are provided on both sides of the top of the guide strip.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. The transformer bias suppression device based on magnetic shielding structure collects rainwater and allows it to flow within the device's internal space. By utilizing external liquids while ensuring the device's internal space remains dry, the device's heat dissipation and cooling effect is enhanced, effectively overcoming the shortcomings and deficiencies of existing technologies that do not utilize external rainwater for heat exchange. 2. The transformer bias suppression device based on the magnetic shielding structure utilizes the external wind and the pressure difference generated by the temperature difference between the inside and outside of the bias suppression device during operation. There is always airflow in the inner cavity of the U-shaped tube. When the U-shaped tube is unloaded, heat exchange and heat dissipation are achieved directly through the flowing air. When there is water in the inner cavity of the U-shaped tube, the water inside can be blown to make it move, thereby carrying away heat and improving its heat exchange capacity. 3. The transformer bias suppression device based on the magnetic shielding structure can suppress airflow in the inner cavity of the loop tube due to temperature difference or external wind force. With the meandering path design of the loop tube, it can not only realize the flow and discharge of air and liquid from the loop tube, but also realize the reciprocating movement of air and liquid in the inner cavity of the loop tube and the continuous shaking and impact of liquid. In this way, more heat can be absorbed, and the oscillating liquid absorbs heat in a dispersed state, resulting in higher and faster absorption efficiency. 4. The transformer bias suppression device based on the magnetic shielding structure adopts the design of inclined plates and guide strips protruding to the outside of the bias suppression device, which can intercept as much wind and rain as possible. The collected rainwater and wind are guided into the inner cavity of the pyramidal cover through the diversion channel, thereby achieving the purpose of air cooling and water cooling in later use. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is an exploded view of the structure of the present invention; Figure 3 This is an exploded view of the location and structure of the loop-shaped tube of the present invention; Figure 4 This is an exploded view of the annular structure of the present invention; Figure 5 This is an exploded view of the pyramidal cover structure of the present invention; Figure 6 This is a schematic diagram of the structure of the protective plate of the present invention; Figure 7 For the present invention Figure 6 Enlarged view of the structure at point A in the middle.

[0016] In the diagram: 1. Box structure; 2. Pyramidal cover; 3. Flow hole; 4. Ring body; 5. Support rod; 6. Lifting ring structure; 7. U-shaped tube; 8. Bottom sealing structure; 9. Leakage hole structure; 10. Protective plate; 11. Strip-shaped opening structure; 12. Inclined plate; 13. Guide strip; 14. Drainage groove; 15. Sealing plug; 16. Vertical shaft; 17. Bottom fan blade; 18. Middle fan blade; 19. Top fan blade. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] See Figures 1-7 This invention provides a technical solution for a transformer bias suppression device based on a magnetic shielding structure: Example 1: like Figure 1 and Figure 2 As shown, the bias suppression device mainly includes a housing structure 1, and further... Figure 2 and Figure 3 As shown, a hollow and inverted pyramidal cover 2 is installed at the top of the inner cavity of the box structure 1 by bolt fasteners. Air and liquid flow holes 3 are opened around the inner wall of the pyramidal cover 2. An annular body 4 is installed and fixed at the middle of the bottom of the pyramidal cover 2, and the upper edge of the annular body 4 is attached to the outer wall of the pyramidal cover 2. A support rod 5 is threaded on the outer wall of the pyramidal cover 2. A lifting ring structure 6 is fixedly installed at the bottom of the support rod 5. A loop tube 7 is installed and fixed in the inner ring of the lifting ring structure 6. The loop tube 7 is assembled by inserting multiple branch pipes and bends.

[0019] Firstly, the inverted pyramidal cover 2 design allows rainwater and dew to flow directly down the inclined surface of the pyramidal cover 2 when they flow into the bias magnetic suppression device. Then, they enter the inner cavity of the annular body 4 through the flow hole 3 for collection. The loop tube 7 adopts a plug-in design, mainly to facilitate later operation and maintenance, that is, to disassemble and replace damaged pipe structures.

[0020] As shown in Figure 4, the bottom of the inner cavity of the annular body 4 is provided with an inclined bottom sealing structure 8, and a leakage hole structure 9 is provided at the lowest end of the bottom sealing structure 8. The bottom sealing structure 8 is designed with an inclination to allow all the flowing liquid to flow to the lower position and then flow out from the leakage hole structure 9, thus avoiding liquid residue.

[0021] likeFigure 3 As shown, one end of the loop-shaped tube 7 is fixedly installed at the bottom of the annular body 4 and located directly below the leakage structure 9. The other end of the loop-shaped tube 7 penetrates through the box structure 1 and extends to the outside of the box structure 1, with its port facing downwards. After receiving the liquid flowing out of the annular body 4, the loop-shaped tube 7 can continuously flow along the loop-shaped pipe structure, thereby realizing heat exchange inside the magnetic bias suppression device, that is, cooling the magnetic bias suppression device. After flowing through the loop-shaped tube 7, the liquid finally exits from the end of the loop-shaped tube 7 located outside the magnetic bias suppression device.

[0022] The cavity of the annular body 4 is located directly below the flow hole 3. The liquid collected in the pyramidal cover 2 can all pass through the flow hole 3 into the inner cavity of the annular body 4 for transfer.

[0023] Among them, such as Figure 1 , Figure 2 and Figure 6 As shown, protective plates 10 are installed on the four sides of the top of the box structure 1. A strip-shaped opening structure 11 for air and rainwater circulation is provided on the side of the protective plate 10, and the direction of the strip-shaped opening structure 11 is upward.

[0024] In this embodiment, when the bias suppression device is used, especially in rainy weather, the upward-facing strip-shaped structure 11 can guide rainwater into the inner cavity of the pyramidal cover 2. The rainwater, guided by the pyramidal cover 2, enters the inner cavity of the annular body 4 through the flow hole 3, and then enters the inner cavity of the loop tube 7 through the bottom sealing structure 8, that is, into the inner cavity of the box structure 1. Together with the cooling fan structure inside the bias suppression device, it performs heat dissipation and cooling. It should be noted that when the amount of rainwater entering the inner cavity of the loop tube 7 is small, some of the liquid will remain in the inner cavity of the loop tube 7. Together with the existing cooling fan, it will continuously perform heat exchange. If the rainfall is heavy, the rainwater will flow continuously along the path of the loop tube 7. After the heat exchange is completed, it can be discharged to the outside of the box structure 1. Even after the rain stops, some rainwater will still remain in the loop tube 7.

[0025] In this technical solution, rainwater is collected and circulated within the internal space of the magnetic field suppression device. While ensuring the internal space of the magnetic field suppression device remains dry, the heat dissipation and cooling effect of the magnetic field suppression device is enhanced by utilizing liquid from the external environment.

[0026] Example 2: like Figure 1 and Figure 2 As shown, the bias suppression device mainly includes a housing structure 1, and further... Figure 2 andFigure 3 As shown, a hollow and inverted pyramidal cover 2 is installed at the top of the inner cavity of the housing structure 1 by bolt fasteners. A sealing plug 15 is installed through the middle of the pyramidal cover 2, and the upper edge of the sealing plug 15 is higher than the position of the flow hole 3. A vertical shaft 16 is installed through the middle of the sealing plug 15 by a bearing structure. The bottom of the vertical shaft 16 passes through the sealing plug 15 and extends into the inner cavity of the housing structure 1. A bottom fan blade 17, a middle fan blade 18, and a top fan blade 19 are installed on the outer ring of the vertical shaft 16 from bottom to top. The bottom fan blade 17 is located in the inner cavity of the housing structure 1, the middle fan blade 18 is located in the inner cavity of the pyramidal cover 2, and the top fan blade 19 is located on the outer side of the top of the bias suppression device.

[0027] In this embodiment, when there is wind in the external environment, the top fan blade 19 located outside the bias suppression device is driven by the wind force to rotate the vertical axis 16. When the vertical axis 16 rotates, it drives the middle fan blade 18 and the bottom fan blade 17 to rotate. When the bottom fan blade 17 rotates, it drives the air flow in the inner cavity of the housing structure 1, thereby realizing heat exchange. When the middle fan blade rotates, it drives the air flow in the inner cavity of the pyramidal cover 2. Taking the blowing of air into the flow hole 3 as an example, it will generate suction in the inner cavity of the pyramidal cover 2, and then draw in the outside cold air from the strip-shaped opening structure 11 and blow the air into the loop tube 7. On the one hand, it can cool down the water inside and exchange heat, and on the other hand, it can directly carry away the heat absorbed by the loop tube 7 through the airflow, thereby performing heat dissipation and cooling operation on the bias suppression device. If the middle fan blade rotates in the opposite direction, it will draw in air through the port of the connection 7 located outside the bias suppression device, which can also perform heat dissipation and cooling operation on the bias suppression device.

[0028] In the absence of wind, there is a significant temperature difference between the housing structure 1, the pyramidal cover 2, and the external environment. Therefore, the hot air inside the pyramidal cover 2 is continuously expelled from the strip-shaped opening structure 11 due to the pressure difference. Conversely, air is drawn in from the port outside the bias magnetic suppression device for heat exchange. This airflow also drives the rotation of the fan blades, thus accelerating the air circulation. Therefore, airflow can occur within the cavity of the loop tube 7 regardless of whether there is wind or not.

[0029] In this technical solution, by utilizing the external wind and the pressure difference generated by the temperature difference between the inside and outside when the bias magnetic suppression device is working, there will always be airflow in the inner cavity of the U-shaped tube 7. When the U-shaped tube 7 is unloaded, heat exchange and heat dissipation are achieved directly through the flowing air. When there is water in the inner cavity of the U-shaped tube 7, the water inside can also be blown to make it move, thereby carrying away heat and improving its heat exchange capacity.

[0030] In this technical solution, regardless of whether the airflow occurs in the inner cavity of the loop tube 7 due to temperature difference or external wind force, the meandering path design of the loop tube 7 not only allows airflow and liquid to flow out of the loop tube 7, but also enables the airflow and liquid to move back and forth in the inner cavity of the loop tube 7 and the liquid to continuously sway and impact. In this way, more heat can be absorbed, and the oscillating liquid absorbs heat in a dispersed state, resulting in higher and faster absorption efficiency.

[0031] Example 3: like Figure 1 and Figure 2 As shown, the bias suppression device mainly includes a box structure 1, a protective plate 10 is installed on the top four sides of the box structure 1, a strip-shaped opening structure 11 for air and rainwater to circulate is opened on the side of the protective plate 10, an inclined plate 12 is installed in the inner cavity of the strip-shaped opening structure 11, and guide strips 13 are arranged at equal intervals on the top of the inclined plate 12.

[0032] The width of the inclined plate 12 is greater than the width of the strip opening 11, the length of the guide strip 13 is equal to the width of the inclined plate 12, the guide strip 13 is specifically a convex-shaped structure, and drainage grooves 14 are provided on both sides of the top of the guide strip 13.

[0033] In this embodiment, the design of the inclined plate 12 protruding to the outside of the bias magnetic suppression device and the guide strip 13 can intercept as much wind and rain as possible, and guide the collected rainwater and wind through the diversion channel 14 to the inner cavity of the pyramidal cover 2, thereby achieving the purpose of air cooling and water cooling in later use.

[0034] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A transformer bias suppression device based on a magnetic shielding structure, comprising a housing structure (1), characterized in that: The top of the inner cavity of the box structure (1) is equipped with a pyramidal cover (2), and the bottom of the inner wall of the pyramidal cover (2) is provided with a flow hole (3). An annular body (4) is installed at the middle of the bottom of the pyramidal cover (2). The bottom of the inner cavity of the annular body (4) is provided with an inclined bottom sealing structure (8). The lowest point of the bottom sealing structure (8) is provided with a leakage hole structure (9). A U-shaped tube (7) is provided in the inner cavity of the box structure (1) and below the pyramidal cover (2).

2. The transformer bias suppression device based on a magnetic shielding structure according to claim 1, characterized in that: A support rod (5) is threaded onto the outer wall of the pyramidal cover (2), and a lifting ring structure (6) is fixedly installed at the bottom of the support rod (5).

3. The transformer bias suppression device based on a magnetic shielding structure according to claim 1, characterized in that: The loop tube (7) is mainly assembled from branch pipes and bend pipe structures. The loop tube (7) is inserted into the inner ring of the lifting ring structure (6). One end of the loop tube (7) is installed at the bottom of the ring body (4) and is located directly below the leakage hole structure (9). The other end of the loop tube (7) passes through the box structure (1) and extends to the outside of the box structure (1). The cavity area of ​​the ring body (4) is located directly below the flow hole (3) and the two are connected.

4. The transformer bias suppression device based on a magnetic shielding structure according to claim 1, characterized in that: A protective plate (10) is fixedly installed on the top of the box structure (1), and a strip-shaped opening structure (11) for rainwater and air circulation is provided on the side of the protective plate (10).

5. A transformer bias suppression device based on a magnetic shielding structure according to claim 1, characterized in that: A sealing plug (15) is installed through the middle of the pyramidal cover (2), and a bearing shaft structure is installed in the middle of the sealing plug (15), and a vertical shaft (16) is installed in the inner ring of the bearing structure.

6. The transformer bias suppression device based on a magnetic shielding structure according to claim 5, characterized in that: The bottom fan blade (17), middle fan blade (18) and top fan blade (19) are installed sequentially from bottom to top on the outer ring of the vertical shaft (16). The bottom fan blade (17) is located in the inner cavity of the box structure (1) and at the bottom of the pyramidal cover (2). The middle fan blade (18) is located in the inner cavity of the pyramidal cover (2). The top fan blade (19) is located on the outer side of the top of the bias suppression device.

7. A transformer bias suppression device based on a magnetic shielding structure according to claim 4, characterized in that: The strip-shaped opening structure (11) faces upward, and an inclined plate (12) is installed in the inner cavity of the strip-shaped opening structure (11). A guide strip (13) is provided on the top of the inclined plate (12).

8. A transformer bias suppression device based on a magnetic shielding structure according to claim 7, characterized in that: The width of the inclined plate (12) is greater than the width of the strip opening structure (11), and the inclined plate (12) penetrates the strip opening structure (11) and extends to the outside of the protective plate (10). The guide strip (13) is specifically a convex structure, and guide grooves (14) for concentrating and guiding rainwater are provided on both sides of the top of the guide strip (13).

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