A new type of fixed angle structure of insulation for GIL

Abstract

The utility model relates to high -voltage electrical equipment technical field, specifically disclose a new type of insulation piece fixed branch angle structure for GIL, including GIL casing, insulation piece fixed support, particle catcher, three -column type insulation piece, fixed gasket, internal hexagonal flower shape cylinder head screw and fixed nylon pad, one end of insulation piece fixed support is equipped with welding surface, the welding surface is the curved surface that sticks together with GIL casing inner wall, is used for fixed in GIL casing inner wall through welding mode, replace traditional internal bolt connection mode through welding type fixed support structure, significantly improved the assembly efficiency and operating safety of GIL equipment insulation piece, greatly reduced the requirement of GIL casing inner wall machining accuracy, effectively controlled production cost, its fillet design and the application of insulation nylon pad optimize electric field distribution, strengthen the insulation reliability and long -term stability of equipment operation, and this structure design versatility is strong, has good economy and popularization value.

Description

Technical Field

[0001] This utility model relates to the field of high voltage electrical equipment technology, and specifically discloses a novel insulating component fixing bracket structure applied to GIL. Background Technology

[0002] Gas-insulated metal-enclosed transmission lines (GILs) are high-voltage transmission equipment that uses an inert gas (such as SF6 or an SF6 / N2 mixture) as the insulating medium to seal the high-voltage conductors inside a metal casing. They offer significant advantages such as large transmission capacity, low loss, high reliability, and electromagnetic environmental friendliness, and are widely used in high-voltage and ultra-high-voltage transmission projects, as well as in special applications such as hydropower stations and substation outgoing lines. One of the core components of a GIL is the insulating element, which supports and secures the central conductor and ensures sufficient insulation strength. The reliability and ease of its installation and fixation are crucial to the overall performance and manufacturing cost of the equipment.

[0003] Currently, the internal insulation components of GIL (Gas Insulator) equipment are mostly fixed using traditional methods such as bolt fastening. This method has several inherent drawbacks in practical applications: First, the assembly process usually requires operators to enter the GIL housing, which not only limits working space and reduces efficiency but also poses certain safety and quality risks. Second, this method places extremely stringent requirements on the machining precision of the GIL housing's inner wall, especially its geometric tolerances; otherwise, reliable installation cannot be guaranteed, significantly increasing the manufacturing cost of the metal housing. Furthermore, the sharp edges of traditional fixing structures are prone to causing electric field distortion, posing a potential hazard of inducing partial discharge and threatening the long-term operational reliability of the equipment. Utility Model Content

[0004] This invention proposes a novel insulating component fixing bracket structure for use in GILs. By replacing the traditional internal bolt connection method with a welded fixing bracket structure, it significantly improves the assembly efficiency and operational safety of GIL equipment insulating components, while greatly reducing the requirements for machining precision of the inner wall of the GIL housing.

[0005] This utility model is implemented as follows: a novel insulating component fixing bracket structure applied to GIL, including a GIL shell, an insulating component fixing bracket, a particle trap, a three-column insulating component, a fixing washer, an internal hexagonal flower-shaped cylindrical head screw, and a fixing nylon washer, characterized in that: one end of the insulating component fixing bracket is provided with a welding surface, the welding surface being a curved surface that fits against the inner wall of the GIL shell, used to fix it to the inner wall of the GIL shell by welding;

[0006] The other end of the insulating component fixing leg is provided with a central recessed through hole and multiple through holes distributed around the central recessed through hole;

[0007] The internal hexagonal flower-shaped cylindrical head screw passes through the fixing washer, the central countersunk through hole and is threadedly connected to the low-voltage insert of the insulating component.

[0008] The fixing nylon pad is installed inside the through hole;

[0009] The particulate trap is positioned between the three-post insulator and the GIL housing.

[0010] As a preferred embodiment of the novel insulating component fixing bracket structure applied to GIL according to this utility model, the insulating component fixing bracket, particle trap, and fixing gasket are made of aluminum.

[0011] As a preferred embodiment of the novel insulating component fixing bracket structure applied to GIL according to this utility model, the material of the three-column insulating component is epoxy resin.

[0012] As a preferred embodiment of the novel insulating component fixing bracket structure applied to GIL according to this utility model, the fixing nylon pad is made of nylon.

[0013] As a preferred embodiment of the novel insulating component fixing bracket structure applied to GIL according to this utility model, all boundaries of the insulating component fixing bracket, except for the boundary of the welding surface, are rounded.

[0014] As a preferred embodiment of the novel insulating component fixing bracket structure applied to GIL according to this utility model, the number of through holes is four.

[0015] The beneficial effects of this utility model are:

[0016] This device replaces the traditional internal bolt connection method with a welded fixed support structure, which significantly improves the assembly efficiency and operational safety of the insulation components of the GIL equipment. At the same time, it greatly reduces the requirements for the machining accuracy of the inner wall of the GIL shell and effectively controls the production cost. Its rounded corner design and the use of insulating nylon pads optimize the electric field distribution and enhance the insulation reliability and long-term stability of the equipment. The structural design is highly versatile and has good economic benefits and promotional value. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0018] Figure 1 This is a structural diagram of the present utility model;

[0019] Figure 2This is a partial cross-sectional structural diagram of the present invention;

[0020] Figure 3 This is a structural diagram of the fixing support foot of the insulating component of this utility model.

[0021] The markings in the diagram are: 1. Insulator fixing foot; 2. Particle trap; 3. Three-post insulator; 4. Low-voltage insert for insulator; 5. Fixing washer; 6. Socket head cap screw; 7. Fixing nylon washer; 8. Central recessed through hole; 9. Through hole; 10. Welding surface. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and specific embodiments to aid in understanding its content. Unless otherwise specified, the methods used in this invention are conventional methods; the raw materials and apparatus used, unless otherwise specified, are conventional commercially available products.

[0023] Please see Figure 1-3 A novel insulating component fixing bracket structure for use in GIL includes a GIL housing, an insulating component fixing bracket 1, a particle trap 2, a three-column insulating component 3, a fixing washer 5, an internal hexagonal socket head cap screw 6, and a fixing nylon washer 7. The characteristic feature is that one end of the insulating component fixing bracket 1 is provided with a welding surface 10, which is a curved surface that fits against the inner wall of the GIL housing, and is used to fix it to the inner wall of the GIL housing by welding.

[0024] The other end of the insulating component fixing leg 1 is provided with a central recessed through hole 8 and a plurality of through holes 9 distributed around the central recessed through hole 8;

[0025] The internal hexagonal flower-shaped cylindrical head screw 6 passes through the fixing washer 5 and the central countersunk through hole 8 in sequence and is threadedly connected to the insulating low-voltage insert 4.

[0026] The fixed nylon pad 7 is installed inside the through hole 9;

[0027] The particulate trap 2 is positioned between the three-post insulator 3 and the GIL housing.

[0028] In this embodiment: the main body is fixed by directly welding the welding surface 10 of the insulating support leg 1 to the inner wall of the GIL housing, thereby avoiding the need for assembly personnel to enter the housing for work; during assembly, the particle trap 2 is first aligned with the hole position of the three-column insulating component 3, and then the fixing gasket 5 and the insulating support leg 1 are placed in sequence. The hexagonal socket head cap screw 6 is passed through the central countersunk through hole 8 and screwed into the low-voltage insert 4 of the insulating component, thereby pressing the entire support leg structure tightly onto the insulating component to achieve mechanical connection; finally, the fixing nylon pad 7 is installed in the through holes 9 around the support leg to play an insulating and buffering role. At the same time, all non-welded edges of the support leg are rounded to effectively smooth the electric field distribution and prevent partial discharge. The overall structure significantly improves assembly efficiency and reduces the requirements for the machining accuracy of the inner wall of the housing while ensuring mechanical strength.

[0029] As a technical optimization of this utility model, the insulating fixing foot 1, the particle trap 2, and the fixing pad 5 are made of aluminum.

[0030] In this embodiment, the insulating fixing foot 1, the particle trap 2, and the fixing pad 5 are all made of aluminum, which makes full use of the characteristics of aluminum material, such as light weight, high strength and good conductivity, so as to ensure the mechanical strength of the structure and facilitate welding and processing.

[0031] As a technical optimization of this utility model, the material of the three-column insulating component 3 is epoxy resin.

[0032] In this embodiment: the three-column insulating component 3 is made of epoxy resin. Epoxy resin has extremely high electrical strength, stable mechanical properties and excellent processability, which can reliably support the conductor and ensure the insulation reliability of the equipment.

[0033] As a technical optimization of this utility model, the material of the fixed nylon pad 7 is nylon.

[0034] In this embodiment: the fixed nylon pad 7 is made of nylon. Nylon material has good insulation properties, mechanical toughness and wear resistance, and can provide reliable insulation and isolation between metal parts and buffer vibration.

[0035] As a technical optimization of this utility model, all boundaries of the insulating component fixing leg 1, except for the boundary of the welding surface 10, are rounded.

[0036] In this embodiment, the insulating component fixing feet 1 are all rounded except for the welding boundary to eliminate the electric field concentration effect caused by sharp edges, fundamentally reducing the risk of partial discharge and improving the long-term operational reliability of the equipment.

[0037] As a technical optimization of this utility model, the number of through holes 9 is four.

[0038] In this embodiment, there are four through holes 9. This number is arranged symmetrically and reasonably. Under the premise of ensuring sufficient installation strength and uniform distribution of nylon pads, the structure is simplified to facilitate production and assembly.

[0039] The working principle and usage process of this utility model are as follows: During installation, first align the particle trap 2 with the corresponding position inside the GIL housing and align it with the mounting hole on the three-post insulator 3. Then, place the fixing washer 5 on the upper surface of the three-post insulator 3, and then place the insulator fixing leg 1 on the fixing washer 5, ensuring that the central countersunk through hole 8 on the leg is aligned with the threaded hole of the low-voltage insert 4 in the three-post insulator 3. After that, use an internal hexagonal head screw 6 to pass through the fixing washer 5 and the central countersunk through hole 8 and screw it into the low-voltage insert 4. Tighten the internal hexagonal head screw. Screw 6 can be used to press the insulating component fixing foot 1, the three-post insulating component 3 and the particle trap 2 into a whole module; then, the four fixing nylon pads 7 are pressed into the four through holes 9 around the insulating component fixing foot 1 until they are fully in place; finally, the assembled whole module is adjusted to the designed installation position inside the GIL housing, so that the welding surface 10 on the insulating component fixing foot 1 is completely in contact with the inner wall of the GIL housing, and the welding surface 10 is continuously welded to the inner wall of the housing using a welding process, thereby completing the fixed installation of the entire insulating component module. This process does not require personnel to enter the housing to operate.

[0040] In the description of this utility model, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inner", "outer", "back", "middle", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0041] However, the above description is only a specific embodiment of this utility model and should not be construed as limiting the scope of implementation of this utility model. Therefore, any substitution of equivalent components or equivalent changes and modifications made in accordance with the scope of protection of this utility model should still fall within the scope of the claims of this utility model.

Claims

1. A novel insulating component fixing bracket structure for use with GIL, comprising a GIL housing, insulating component fixing brackets (1), a particle trap (2), a three-post insulating component (3), a fixing washer (5), an internal hexagonal socket head cap screw (6), and a fixing nylon washer (7), characterized in that: One end of the insulating component fixing leg (1) is provided with a welding surface (10), which is a curved surface that fits against the inner wall of the GIL housing and is used to fix it to the inner wall of the GIL housing by welding. The other end of the insulating component fixing leg (1) is provided with a central recessed through hole (8) and a plurality of through holes (9) distributed around the central recessed through hole (8); The internal hexagonal flower-shaped cylindrical head screw (6) passes through the fixing washer (5), the central countersunk through hole (8) in sequence, and is threadedly connected to the insulating low-voltage insert (4); The fixing nylon pad (7) is installed in the through hole (9); The particulate trap (2) is disposed between the three-post insulator (3) and the GIL housing.

2. The novel insulating component fixing bracket structure applied to GIL according to claim 1, characterized in that: The insulating fixing feet (1), the particle trap (2), and the fixing pad (5) are made of aluminum.

3. The novel insulating component fixing bracket structure applied to GIL according to claim 1, characterized in that: The material of the three-column insulating component (3) is epoxy resin.

4. A novel insulating component fixing bracket structure for use in GILs according to claim 1, characterized in that: The fixed nylon pad (7) is made of nylon.

5. A novel insulating component fixing bracket structure for use in GILs according to claim 1, characterized in that: Except for the boundary of the welding surface (10), all other boundaries of the insulating component fixing leg (1) are rounded.

6. A novel insulating component fixing bracket structure for use in GILs according to claim 1, characterized in that: The number of through holes (9) is four.

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