Inner shielding structure of basin-type insulator
By setting up the pillar, pores and gaps in the shielded ring of the basin insulator, the problem of air bubble or air gap defects caused by thermal expansion and contraction deformation during the pouring of the pot is solved, ensuring the stability of the insulating performance and reducing the stability of the insulation performance and reducing it. Risk of electrical failure and safety accidents.
Patent Information
- Application Number
- CN202421010576.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-10
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2034-05-10
AI Technical Summary
Commonly used spring-shaped or rod-shaped shielding rings are prone to local bubbles or air gap defects due to thermal expansion, cold contraction and deformation during the pouring process of the basin, which affects the insulation performance and may cause electrical failures or safety accidents.
Design a pelvic insulator internal shielding structure. The shielding ring has multiple pillars and several pillars and gaps in the body. It uses these pores and gaps as the pouring liquid flow channel to absorb the thermal expansion and contraction of the shielding ring during the pouring of the pot. Deformation to prevent bubbles or air gap defects.
Effectively prevent the bubbles or air gap defects caused by thermal expansion and contraction deformation during the pouring process, ensure the stability of the insulating performance, and reduce the risk of electrical failure and safety accidents.
Smart Images
Figure CN222421479U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of high-voltage switch equipment, and in particular relates to an inner shielding structure of a pot-type insulator. Background Art
[0002] For high-voltage switchgear, the voltage level mainly depends on the various electrical and mechanical performance indicators of the insulator. The higher the voltage level, the higher the requirements for the insulator. Basin insulators, also known as basins and insulators, are available in plate (flat) and cone shapes. The main material is epoxy resin + a small amount of filler. Metal inserts for conducting current are arranged on the epoxy resin. They are used in gas-insulated metal-enclosed switchgear. The annular areas on both sides of the edge are connected to the flange of the shell, so its circumference is circular. Basin insulators play an important role in the power industry with their excellent insulation performance, high strength and long life, compact structure, good environmental adaptability and easy detection and maintenance. With the continuous development and innovation of the power industry, basin insulators will continue to play their unique advantages and provide strong guarantees for the safe, stable and efficient operation of the power system.
[0003] The shielding ring inside the basin is generally located inside the epoxy resin near the outer periphery of the basin. It is made of metal and serves to improve the electric field on the surface of the basin near the shield (this is the junction of the three materials of metal, gas and insulating parts). It can also be used as an electrometer to determine whether a phase embedding corresponding to the shield is charged. Currently, the commonly used shielding ring shapes are spring-shaped and rod-shaped.
[0004] However, the commonly used spring-shaped or rod-shaped shielding rings have certain limitations, which are mainly manifested in the following aspects: first, the spring is not easy to fix during the production and casting process, and is prone to twisting or deformation, which affects the yield rate of the pot and the electric field shielding effect; second, the rod-shaped shielding ring must have a certain diameter in order to play a shielding role. Therefore, during the pot casting process, due to the large deformation caused by thermal expansion and contraction, bubbles or air gap defects are easily generated locally; once bubbles or air gap defects are generated locally, it will greatly affect the insulation performance of the pot-type insulator, and easily cause electrical failures or safety accidents. Utility Model Content
[0005] In order to overcome the above technical defects, the utility model provides an inner shielding structure of a pot-type insulator, which can solve the technical problem that bubbles or air gap defects are easily generated locally due to thermal expansion and contraction deformation during the casting process of the shielding ring pot.
[0006] In order to achieve the above purpose, the utility model adopts the following technical contents:
[0007] A pot-type insulator inner shielding structure comprises a shielding ring body;
[0008] A plurality of pillars are arranged on the circumference of the shielding ring body;
[0009] A notch and a plurality of through holes are provided on the circumference of the shielding ring body, and the notch and the through holes are used as pouring liquid flow channels during the pouring process.
[0010] Furthermore, the shielding ring body is provided with an annular groove along the circumferential direction, the annular groove comprises a first side surface and a second side surface which are symmetrically arranged, and the first side surface and the second side surface are connected by an arc-shaped surface transition;
[0011] The first side surface, the second side surface and the arc-shaped surface are integrally formed.
[0012] Furthermore, the first side surface, the second side surface and the arc-shaped surface are respectively provided with through holes arranged in an array.
[0013] Furthermore, the cross section of the arc-shaped surface is an elliptical arc.
[0014] Furthermore, the inner diameter of the shielding ring body is smaller than the inner diameter of the pot-type insulator boss.
[0015] Furthermore, the support column is made of aluminum.
[0016] Furthermore, one end of the support is connected to the shielding ring body, and the other end is connected to the atmosphere.
[0017] Furthermore, the shielding ring body is provided with at least one notch; when there are multiple notches, the multiple notches are evenly distributed on the circumference of the shielding ring body.
[0018] Furthermore, the thickness of the shielding ring body is less than or equal to 3 mm.
[0019] Furthermore, the shielding ring body is made of aluminum alloy.
[0020] Compared with the prior art, the utility model has the following beneficial effects:
[0021] The utility model provides an inner shielding structure of a pot-type insulator, which comprises a shielding ring body and pillars connected to the shielding ring body in the circumferential direction, wherein the pillars are used to connect the inner shielding structure with the pot-type insulator; a notch and a plurality of through holes are provided in the circumferential direction of the shielding ring body, and the notch and the through holes can be used as a pouring liquid flow channel in a pouring process for the pouring liquid to circulate, thereby accelerating the filling time of a high-temperature liquid insulating material in a pot-type mold, absorbing the thermal expansion and contraction deformation of the shielding ring in the pot-type pouring process, and preventing local generation of bubbles or air gap defects, thereby ensuring the insulation performance of the pot-type insulator; the structure and principle of the inner shielding structure are simple, and the manufacture and implementation are convenient, the insulation performance is good, and the utility model has good popularization and application value.
[0022] Preferably, in the utility model, an annular groove is provided in the shielding ring body along the circumferential direction, that is, the cross section of the shielding ring body is U-shaped, which not only simplifies the processing method and can be stamped to save materials, but also ensures the rigidity of the entire inner shielding structure.
[0023] Preferably, in the utility model, the shielding ring body adopts a metal thin layer with a thickness of no more than 3 mm. The metal thin layer has good conductivity and electromagnetic shielding performance, can effectively reflect and absorb electromagnetic radiation, and protect internal circuits and components from damage by electromagnetic interference; and the metal thin layer can maintain stable performance even in harsh working environments, thereby extending its service life. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 A schematic diagram of an inner shielding structure of a pot-type insulator provided by an embodiment of the utility model;
[0025] Figure 2 A front view of an inner shielding structure of a pot-type insulator provided by an embodiment of the utility model;
[0026] Figure 3 A schematic diagram of an annular groove in an inner shielding structure of a pot-type insulator provided by an embodiment of the utility model;
[0027] Figure 4 A side view of an inner shielding structure of a pot-type insulator provided by an embodiment of the utility model;
[0028] Figure 5 A schematic diagram of the connection of an inner shielding structure of a pot-type insulator provided by an embodiment of the utility model;
[0029] Figure 6 A partially enlarged view of a connection end portion of an inner shielding structure of a pot-type insulator provided in an embodiment of the utility model.
[0030] Reference numerals:
[0031] 1. Shielding ring body; 2. Pillar; 3. Through hole; 4. Notch; 5. Annular groove;
[0032] 5-1, first side surface; 5-2, second side surface; 5-3, arcuate surface. DETAILED DESCRIPTION
[0033] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clear, the following specific embodiments further describe the utility model in detail. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model.
[0034] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.
[0035] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0036] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.
[0037] In the description of the embodiments of the present utility model, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use, it is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.
[0038] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0039] In the description of the embodiments of the present utility model, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0040] The utility model is further described in detail below with reference to the accompanying drawings:
[0041] Example
[0042] As mentioned in the background technology, the gas chambers or supporting conductors between the GIS components are separated by pot insulators. The pot insulator is an important type of insulating component in GIS equipment. Discharge is easily generated between the insulating material and the metal flange, and a shielding ring is usually required to be set inside the pot insulator.
[0043] The commonly used spring-shaped or rod-shaped shielding rings have certain limitations, which are mainly manifested in the following aspects: first, the spring-shaped spring is not easy to fix during the production and casting process, and is prone to twisting or deformation, which affects the yield rate of the pot and the electric field shielding effect; second, the rod-shaped shielding ring must have a certain diameter in order to play a shielding role. Therefore, during the pot casting process, due to the large deformation due to thermal expansion and contraction, bubbles or air gap defects are easily generated locally; once bubbles or air gap defects are generated locally, it will greatly affect the insulation performance of the pot-type insulator, and easily cause electrical failures or safety accidents.
[0044] In order to solve the above problems, the present embodiment provides an inner shielding structure of a pot-type insulator. The inner shielding structure provides a gap and a plurality of through holes in the circumferential direction, and utilizes the gap and the plurality of through holes to provide a fluid channel for the casting liquid, thereby preventing the shielding ring from thermal expansion and contraction deformation. The inner shielding structure solves the problem of local bubbles or air gap defects that are easily generated due to thermal expansion and contraction deformation during the casting process of the shielding ring pot.
[0045] like Figure 1 and Figure 2 As shown, this embodiment provides an inner shielding structure of a pot-type insulator, comprising a shielding ring body 1 and four aluminum pillars 2 connected circumferentially to the shielding ring body 1. Here, the shielding ring body is preferably made of aluminum alloy, which can effectively reduce the electric field strength inside the insulator, thereby improving the electrical performance and service life of the equipment; Figure 5 and Figure 6 As shown, one end of the support 2 is connected to the shielding ring body 1, and the other end is connected to the atmosphere.
[0046] In order to solve the problem of thermal expansion and contraction deformation of the shielding ring during the pouring process, a gap 4 and multiple through holes 3 are opened in the circumference of the shielding ring body 1. These through holes 3 and gap 4 are used as pouring liquid channels during the pouring process to facilitate the circulation of pouring liquid, speed up the filling time of high-temperature liquid insulating material in the basin mold, absorb the thermal expansion and contraction deformation of the shielding ring during the basin pouring process, and prevent local bubbles or air gap defects.
[0047] like Figure 3 and Figure 4As shown, in this embodiment, the shielding ring body 1 is provided with an annular groove 5 along the circumferential direction, that is, the cross section of the shielding ring is a U-shaped structure, and the outer contour close to the center side of the pot-type insulator is an elliptical arc, that is, the arc surface 5-3, and the two sides tangent to the elliptical arc segment are planar structures, that is, the first side surface 5-1 and the second side surface 5-2; a plurality of through holes 3 evenly arranged (array arrangement) are provided on the first side surface 5-1, the second side surface 5-2 and the arc surface 5-3.
[0048] In this embodiment, the shielding ring body 1 adopts a metal thin layer with a thickness of no more than 3 mm. The metal thin layer has good conductivity and electromagnetic shielding performance, can effectively reflect and absorb electromagnetic radiation, and protect the internal circuits and components from damage by electromagnetic interference; and the metal thin layer can maintain stable performance in harsh working environments, thereby extending the service life.
[0049] In this embodiment, the inner diameter of the shielding ring body 1 is smaller than the inner diameter of the edge boss of the pot-type insulator (the boss is usually located inside the sealing groove). In addition, the inner diameter of the shielding ring body 1 is smaller than the center line of the cross section of the pot-type insulator. When the pot is a structure with one side raised and one side sunken, the center line of the cross section of the shielding ring body 1 is consistent with the center line of the cross section of the pot-type insulator, or is offset to the convex surface of the pot-type insulator.
[0050] In this embodiment, in order to make the internal electric field distribution more uniform and the shielding effect better, the inner side of the shielding ring body 1 is made into an elliptical shape.
[0051] In summary: the utility model provides an inner shielding structure of a pot-type insulator. Compared with the existing inner shielding structure, the utility model has the following advantages:
[0052] The inner shielding structure comprises a shielding ring body and pillars connected to the shielding ring body in the circumferential direction, the pillars are used to connect the inner shielding structure with the basin insulator; a notch and a plurality of through holes are provided in the circumferential direction of the shielding ring body, the notch and the through holes can be used as a pouring liquid flow channel during the pouring process, for the pouring liquid to circulate, thereby accelerating the filling time of the high-temperature liquid insulating material in the basin mold, absorbing the thermal expansion and contraction deformation of the shielding ring during the basin pouring process, and preventing the local generation of bubbles or air gap defects, thereby ensuring the insulation performance of the basin insulator; the structure and principle of the inner shielding structure are simple, easy to manufacture and implement, good insulation performance, and have good promotion and application value.
[0053] The above embodiment is only one of the implementation methods that can realize the technical solution of the utility model. The scope of protection required by the utility model is not limited only to this embodiment, but also includes within the technical scope disclosed by the utility model, any changes, replacements and other implementation methods that can be easily thought of by any technician familiar with the technical field.
Claims
1. A pot-type insulator inner shielding structure, characterized in that: It comprises a shielding ring body (1); A plurality of pillars (2) are arranged on the circumference of the shielding ring body (1); A notch (4) and a plurality of through holes (3) are provided on the circumference of the shielding ring body (1); the notch (4) and the through holes (3) are used as pouring liquid flow channels during the pouring process.
2. The inner shielding structure of a pot-type insulator according to claim 1, characterized in that: The shielding ring body (1) is provided with an annular groove (5) along the circumferential direction, the annular groove (5) comprising a first side surface (5-1) and a second side surface (5-2) which are symmetrically arranged, the first side surface (5-1) and the second side surface (5-2) being connected to each other via an arc transition of an arc surface (5-3); The first side surface (5-1), the second side surface (5-2) and the arc-shaped surface (5-3) are integrally formed.
3. The inner shielding structure of a pot-type insulator according to claim 2, characterized in that: The first side surface (5-1), the second side surface (5-2) and the arc-shaped surface (5-3) are respectively provided with through holes (3) arranged in an array.
4. The inner shielding structure of a pot-type insulator according to claim 2, characterized in that: The cross section of the arc-shaped surface (5-3) is an elliptical arc.
5. The inner shielding structure of a pot-type insulator according to claim 1, characterized in that: The inner diameter of the shielding ring body (1) is smaller than the inner diameter of the pot-type insulator boss.
6. The inner shielding structure of a pot-type insulator according to claim 1, characterized in that: The support column (2) is made of aluminum.
7. The inner shielding structure of a pot-type insulator according to claim 1, characterized in that: One end of the support (2) is connected to the shielding ring body (1), and the other end is connected to the atmosphere.
8. The inner shielding structure of a pot-type insulator according to claim 1, characterized in that: The shielding ring body (1) is provided with at least one notch (4); when there are multiple notches (4), the multiple notches (4) are evenly distributed in the circumferential direction of the shielding ring body (1).
9. The inner shielding structure of a pot-type insulator according to claim 1, characterized in that: The thickness of the shielding ring body (1) is less than or equal to 3 mm.
10. The inner shielding structure of a pot-type insulator according to claim 1, characterized in that: The shielding ring body (1) is made of aluminum alloy.