Solid-sealed polar pole structure suitable for high-altitude wind power circuit breaker
By designing a multi-layered staggered umbrella skirt structure and heat dissipation channels on the solid-sealed pole, the insulation and heat dissipation problems of the solid-sealed pole in high-altitude environments are solved, thereby achieving the reliability and life extension of wind power equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JINZHOU SENYUAN ELECTRIC APPLIANCE CO LTD
- Filing Date
- 2025-05-12
- Publication Date
- 2026-05-05
AI Technical Summary
Traditional solid-sealed poles are difficult to design for creepage distance in high-altitude areas to meet insulation and heat dissipation requirements, and are prone to surface discharge, which affects the reliability and lifespan of wind power equipment.
The design incorporates a multi-layered, staggered umbrella skirt structure with serrated edges to increase creepage paths. Heat dissipation channels and heat-conducting rods are installed inside the solid-sealed poles, utilizing the thermal conductivity of alumina for heat exchange. Additionally, reinforcing ribs are added at the connecting flanges to enhance structural stability.
It effectively suppresses surface discharge, improves insulation performance and heat dissipation efficiency, and ensures reliable operation and mechanical strength of wind power equipment in high-altitude environments.
Smart Images
Figure CN224204028U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of wind power circuit breaker technology, and more specifically, to a solid-sealed pole structure suitable for high-altitude wind power circuit breakers. Background Technology
[0002] High-altitude areas are typically characterized by extreme climatic conditions such as low air pressure, low air density, drastic temperature variations, strong ultraviolet radiation, and large diurnal temperature ranges. These factors significantly impact the insulation performance, heat dissipation efficiency, mechanical strength, and service life of wind turbine circuit breakers. For example, in low-pressure environments, the insulation strength of the air decreases, which can lead to a reduction in the breakdown voltage of electrical gaps, increasing the risk of flashover or short circuits. Simultaneously, reduced heat dissipation efficiency can cause overheating, affecting stable operation and lifespan. As a critical protective device in the electrical system of wind farms, wind turbine circuit breakers are responsible for rapidly interrupting current during grid faults to protect the generator sets and the grid. In high-altitude environments, circuit breakers must not only withstand harsher natural conditions but also ensure reliable operation under extreme conditions. This places higher demands on the design, materials, and manufacturing processes of circuit breakers. In particular, the solid-sealed pole, as a core component inside the circuit breaker, directly affects the overall performance and reliability of the circuit breaker due to its structural strength, insulation performance, and thermal stability.
[0003] The creepage distance design of traditional solid-sealed poles is difficult to meet the special requirements of high-altitude areas, and is prone to surface discharge, leading to equipment failure. In addition, its heat dissipation and insulation performance are greatly reduced in high-altitude environments, which cannot guarantee the reliable operation of wind power equipment and restricts the development of the wind power industry in high-altitude areas. Utility Model Content
[0004] In order to overcome the above-mentioned defects of the prior art, this utility model provides a solid-sealed pole structure suitable for high-altitude wind power circuit breakers.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a solid-sealed pole structure suitable for high-altitude wind power circuit breakers, comprising a first insulating shell, a first umbel skirt on the outer surface of the first insulating shell, a first end shell at one end of the first insulating shell, a second end shell connected to the end of the first end shell, a second insulating shell connected to the end of the second end shell, a second umbel skirt on the outer surface of the second insulating shell, connecting flanges at adjacent ends of the second end shell and the first end shell, reinforcing ribs fixedly connected between the two connecting flanges and the first and second end shells, a plurality of heat-conducting rods inserted equidistantly in an annular pattern on the edges of the first and second end shells, serrated patterns on the edges of the first and second umbel skirts, an arc-extinguishing chamber inside the first insulating shell, an aluminum alloy conductive rod connected to one end of the arc-extinguishing chamber, one end of the aluminum alloy conductive rod extending into the interior of the second insulating shell, and a shielding mesh inside the first and second end shells located outside the aluminum alloy conductive rod.
[0006] As a further improvement to the technical solution of this utility model, the inclination angles of each layer of umbrella skirt on the first umbrella skirt edge and the second umbrella skirt edge are different.
[0007] As a further improvement to the technical solution of this utility model, the first insulating shell, the first end shell, the second end shell, and the second insulating shell are all components made of epoxy resin.
[0008] As a further improvement to the technical solution of this utility model, the two connecting flanges between the ends of the first end shell and the second end shell are fixedly connected by bolts.
[0009] As a further improvement to the technical solution of this utility model, the reinforcing ribs are all fixed to the contact positions of the connecting flange, the first end shell and the second end shell by hot melt adhesive.
[0010] As a further improvement to the technical solution of this utility model, the interior of the first insulating shell, the first end shell, the second end shell, and the second insulating shell are provided with heat dissipation channels corresponding to the exterior of the aluminum alloy conductive rod, and the shielding mesh is placed inside the heat dissipation channels.
[0011] As a further improvement to the technical solution of this utility model, one end of the heat-conducting rod extends into the heat dissipation channel, and the heat-conducting rod is a component made of aluminum oxide.
[0012] The beneficial effects of this utility model are:
[0013] 1. By designing a variable angle on the multi-layered staggered umbrella skirts on the original solid-sealed pole shell, that is, the tilt angle of each umbrella skirt is not exactly the same, the creepage path can be extended more effectively, and the electric field intensity can be dispersed in different directions, reducing the risk of excessive local electric field. Furthermore, the edges of the umbrella skirts are serrated. The addition of serrated structures to the edges of the umbrella skirts can further increase the path of surface discharge, while disrupting the uniform distribution of the electric field, thus more effectively suppressing surface discharge.
[0014] 2. By setting up a heat dissipation channel inside the solid-sealed electrode, the channel uses the good heat transfer effect and insulation of the alumina heat-conducting rod to exchange heat with the outside air, and uses the temperature difference between the inside and outside to continuously cool down the inside of the solid-sealed electrode.
[0015] 3. By adding reinforcing ribs to the edge of the connecting flange, the strength and rigidity of the flange are improved, ensuring the stability of the connection between the flange and other components and reducing loosening or damage caused by vibration or impact. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the structure of this utility model.
[0017] Figure 2 This is a cross-sectional view of the present invention.
[0018] Figure 3 This utility model Figure 1 Enlarged view of part A in the middle.
[0019] The attached figures are labeled as follows: 1. First insulating shell; 2. First umbrella skirt edge; 3. First end shell; 4. Second end shell; 5. Connecting flange; 6. Second insulating shell; 7. Second umbrella skirt edge; 8. Arc extinguishing chamber; 9. Shielding mesh; 10. Aluminum alloy conductive rod; 11. Heat conducting rod; 12. Reinforcing rib; 13. Serrated texture. Detailed Implementation
[0020] 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.
[0021] As attached Figure 1-3The solid-sealed pole structure shown is suitable for high-altitude wind power circuit breakers. It includes a first insulating shell 1, a first umbrella skirt 2 on the outer surface of the first insulating shell 1, a first end shell 3 at one end of the first insulating shell 1, a second end shell 4 connected to the end of the first end shell 3, a second insulating shell 6 connected to the end of the second end shell 4, a second umbrella skirt 7 on the outer surface of the second insulating shell 6, a connecting flange 5 at the adjacent ends of the second end shell 4 and the first end shell 3, and reinforcing ribs 12 fixedly connected between the two connecting flanges 5 and the first end shell 3 and the second end shell 4. Several heat-conducting rods 11 are inserted into the edges of the first end shell 3 and the second end shell 4 in an annular pattern at equal intervals. Serrated patterns 13 are provided at the edges of the first umbrella skirt 2 and the second umbrella skirt 7. An arc-extinguishing chamber 8 is provided inside the first insulating shell 1. An aluminum alloy conductive rod 10 is connected to one end of the arc-extinguishing chamber 8. One end of the aluminum alloy conductive rod 10 extends into the interior of the second insulating shell 6. A shielding mesh 9 is provided inside the first end shell 3 and the second end shell 4 outside the aluminum alloy conductive rod 10.
[0022] As attached Figure 1-2 As shown, the inclination angles of each layer of umbrella skirt on the first umbrella skirt edge 2 and the second umbrella skirt edge 7 are different, which can more effectively extend the creepage path and disperse the electric field intensity in different directions, reducing the risk of excessive local electric field.
[0023] As attached Figure 1-2 As shown, the first insulating shell 1, the first end shell 3, the second end shell 4, and the second insulating shell 6 are all components made of epoxy resin. Epoxy resin has high insulation resistance and breakdown voltage, which can effectively prevent current leakage and short circuit, ensure the safe operation of the solid-sealed pole, and has a certain hardness and strength, which can withstand a certain mechanical stress and vibration, and protect the internal components from damage.
[0024] As attached Figure 1-3 As shown, the two connecting flanges 5 between the ends of the first end shell 3 and the second end shell 4 are fixedly connected by bolts, which facilitates the connection and disassembly of the two connecting flanges 5, and thus facilitates the assembly and disassembly of the first end shell 3 and the second end shell 4.
[0025] As attached Figure 1-3 As shown, the reinforcing rib 12 is fixed to the connecting flange 5, the first end shell 3 and the second end shell 4 at the contact points with each other by hot melt adhesive, which improves the strength and rigidity of the connecting flange 5, ensures the connection stability of the flange with other components, and reduces loosening or damage caused by vibration or impact.
[0026] As attached Figure 1-3As shown, the interiors of the first insulating shell 1, the first end shell 3, the second end shell 4, and the second insulating shell 6 are provided with heat dissipation channels corresponding to the exterior of the aluminum alloy conductive rod 10. The shielding mesh 9 is placed inside the heat dissipation channel. One end of the heat-conducting rod 11 extends into the heat dissipation channel, and the heat-conducting rod 11 is a component made of alumina. By setting a heat dissipation channel inside the solid-sealed electrode, the channel uses the good heat transfer effect and insulation of the alumina heat-conducting rod 11 to exchange heat with the outside air, and uses the temperature difference between the inside and outside to continuously cool the interior of the solid-sealed electrode.
[0027] Working principle: This utility model designs a solid-sealed pole structure suitable for high-altitude wind power circuit breakers. The specific structure is shown in the attached instruction manual. Figure 1-3 As shown, in this technical solution, a variable angle design is implemented on the basis of the multi-layered staggered umbrella skirts on the original solid-sealed pole shell, that is, the tilt angle of each umbrella skirt is not exactly the same. This can not only more effectively extend the creepage path, but also disperse the electric field intensity in different directions, reducing the risk of excessive local electric field. The edges of the umbrella skirts are serrated, and a serrated texture 13 structure is added to the edges of the umbrella skirts. This small structural change can further increase the path of surface discharge, while disrupting the uniform distribution of the electric field, and more effectively suppressing the surface discharge phenomenon. In addition, a heat dissipation channel is set inside the solid-sealed pole. The channel uses the good heat transfer effect and insulation of the alumina heat-conducting rod 11 to exchange heat with the outside air, and uses the temperature difference between the inside and outside to continuously cool the inside of the solid-sealed pole. At the same time, a reinforcing rib 12 structure is added to the edge of the connecting flange 5 to improve the strength and rigidity of the flange, ensure the connection stability of the flange with other components, and reduce loosening or damage caused by vibration or impact.
[0028] In the accompanying drawings of the embodiments disclosed in this utility model, only the structures involved in the embodiments of this utility model are shown. Other structures can be referred to with ordinary design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.
[0029] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A solid-sealed pole structure suitable for high-altitude wind power circuit breakers, comprising a first insulating shell (1), characterized in that: The outer surface of the first insulating shell (1) is provided with a first umbrella skirt edge (2), and one end of the first insulating shell (1) is provided with a first end shell (3). The end of the first end shell (3) is connected to a second end shell (4), and the end of the second end shell (4) is connected to a second insulating shell (6). The outer surface of the second insulating shell (6) is provided with a second umbrella skirt edge (7). The adjacent ends of the second end shell (4) and the first end shell (3) are provided with connecting flanges (5). The two connecting flanges (5) are fixedly connected with reinforcing ribs (12) to the first end shell (3) and the second end shell (4). The edges of the first end shell (3) and the second end shell (4) are each equidistantly inserted with a number of heat-conducting rods (11) in an annular pattern. The edges of the first umbrella skirt (2) and the second umbrella skirt (7) are provided with serrated patterns (13). An arc-extinguishing chamber (8) is provided inside the first insulating shell (1). One end of the arc-extinguishing chamber (8) is connected to an aluminum alloy conductive rod (10). One end of the aluminum alloy conductive rod (10) extends into the interior of the second insulating shell (6). A shielding mesh (9) is provided inside the first end shell (3) and the second end shell (4) outside the aluminum alloy conductive rod (10).
2. The solid-sealed pole structure for high-altitude wind power circuit breakers according to claim 1, characterized in that: The tilt angles of the layers of umbrella skirts on the first umbrella skirt edge (2) and the second umbrella skirt edge (7) are not the same.
3. The solid-sealed pole structure for high-altitude wind power circuit breakers according to claim 1, characterized in that: The first insulating shell (1), the first end shell (3), the second end shell (4), and the second insulating shell (6) are all components made of epoxy resin.
4. The solid-sealed pole structure for high-altitude wind power circuit breakers according to claim 1, characterized in that: The two connecting flanges (5) between the ends of the first end shell (3) and the second end shell (4) are fixedly connected by bolts.
5. The solid-sealed pole structure for high-altitude wind power circuit breakers according to claim 1, characterized in that: The reinforcing rib (12) is fixed to the contact position of the connecting flange (5), the first end shell (3) and the second end shell (4) by hot melt adhesive.
6. The solid-sealed pole structure for high-altitude wind power circuit breakers according to claim 1, characterized in that: The first insulating shell (1), the first end shell (3), the second end shell (4) and the second insulating shell (6) are provided with heat dissipation channels corresponding to the outside of the aluminum alloy conductive rod (10), and the shielding mesh (9) is placed inside the heat dissipation channels.
7. The solid-sealed pole structure for high-altitude wind power circuit breakers according to claim 6, characterized in that: One end of the heat-conducting rod (11) extends into the heat dissipation channel, and the heat-conducting rod (11) is a component made of aluminum oxide.