Insulating flange

Abstract

The utility model relates to an insulating flange which is suitable for being installed between a transformer and a combined electric appliance. A main body of the flange body is of an annular plate structure, and bolt holes are formed in the flange so that bolts can penetrate through the bolt holes when a transformer is connected with a combined electric appliance. First insulation sealing layers are arranged on the end faces of the two sides of the flange body so that the contact faces of the two sides of the flange body can be matched with the contact faces of a transformer and a combined electric appliance. Wherein the flange body comprises more than two glass fiber cloth layers; the more than two glass fiber cloth layers are arranged in a laminated manner, and a preset angle is formed between the fiber arrangement directions of every two adjacent glass fiber cloth layers. The flange body of the insulating flange can more effectively bear and disperse pressure loads in all directions, so that the anti-pressure capability of the insulating flange is greatly improved, the insulating property reduction caused by deformation of the insulating flange is avoided, the stable and reliable insulating property of the insulating flange is always maintained, and the normal operation of a transformer and a combined electric appliance is ensured.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of an insulating flange for connecting a transformer and a combined electrical appliance, and particularly relates to an insulating flange. BACKGROUND

[0002] In a power system, the connection and installation of a transformer and a combined electrical appliance are important links for ensuring stable power transmission and distribution. In order to guarantee the insulation performance between the transformer and the combined electrical appliance and avoid electrical faults, an insulating plate is usually arranged between the transformer and the combined electrical appliance. At present, the existing insulating plate is mostly made of epoxy resin pouring. During the operation of the transformer and the combined electrical appliance, the insulating plate bears a large pressure. Due to the limitation of the material properties, the insulating plate is prone to deformation when bearing the pressure, thereby reducing the insulation performance of the insulating plate and affecting the normal operation of the transformer and the combined electrical appliance. SUMMARY

[0003] Therefore, the application provides an insulating flange which is suitable for being installed between a transformer and a combined electrical appliance and comprises a flange body.

[0004] The main body of the flange body is in a ring-shaped plate structure, and a bolt hole is arranged on the flange so that a bolt passes through the bolt hole when the transformer and the combined electrical appliance are connected.

[0005] First insulating sealing layers are arranged on the end faces of the flange body so that the contact surfaces of the flange body are matched with the contact surfaces of the transformer and the combined electrical appliance.

[0006] The flange body comprises two or more glass fiber cloth layers, the two or more glass fiber cloth layers are arranged in a stack, and a preset angle is arranged between the fiber arrangement directions of each two adjacent glass fiber cloth layers.

[0007] In a possible implementation, the preset angle is 0-90 degrees.

[0008] In a possible implementation, the thickness of the flange body is 10-20 mm.

[0009] In a possible implementation, the thickness of the first insulating sealing layer is 2-3 mm.

[0010] In a possible implementation, the second insulating sealing layer is further arranged.

[0011] The second insulating sealing layer is arranged at the outer circumferential surface of the flange body.

[0012] In a possible implementation, the thickness of the second insulating sealing layer is 0.2-0.4 mm.

[0013] In one possible implementation, the bolt hole is provided with two or more; the two or more bolt holes are arranged at intervals along the circumference of the flange body.

[0014] Advantages of the present application

[0015] The flange body of the insulating flange of the present application is formed by two or more layers of glass fiber cloth stacked together, and the fiber arrangement direction of each adjacent two layers of glass fiber cloth is designed with a preset angle, so that the flange body can more effectively bear and distribute pressure load in all directions, greatly improving the pressure resistance of the insulating flange, avoiding the decline of the insulation performance of the insulating flange due to deformation, ensuring that the insulating flange always maintains stable and reliable insulation performance, and protecting the normal operation of the transformer and the combined electrical apparatus. At the same time, by providing the first insulating sealing layer on the two side end faces of the flange body, the insulation performance between the insulating flange and the transformer and the combined electrical apparatus is further enhanced, the roughness of the surface of the insulating flange is reduced, the electric field concentration phenomenon is reduced, and the risk of insulation breakdown is reduced.

[0016] Other features and aspects of the present application will become apparent from the following detailed description of exemplary embodiments with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments, features, and aspects of the present application and serve to explain the principles of the present application.

[0018] Figure 1 A schematic structural diagram of the insulating flange of the present application is shown;

[0019] Figure 2 A cross-sectional view of Figure 1 is shown;

[0020] Figure 3 A schematic diagram showing the installation of the insulating flange between the transformer and the combined electrical apparatus is shown.

[0021] Insulating flange - 100; flange body - 110; bolt hole - 111; first insulating sealing layer - 210; second insulating sealing layer - 220; transformer - 310; combined electrical apparatus - 320. DETAILED DESCRIPTION

[0022] Various exemplary embodiments, features, and aspects of the present application will be described in detail below with reference to the accompanying drawings. The same reference numerals in the drawings represent functionally identical or similar elements. Although various aspects of the embodiments are shown in the drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

[0023] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", and "circumferential" 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 or 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.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0025] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0026] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this application can be implemented without certain specific details. In some instances, methods, means, components, and circuits well-known to those skilled in the art have not been described in detail in order to highlight the main points of this application.

[0027] This application proposes an insulating flange 100, such as Figures 1 to 3 As shown, the flange body 110 is suitable for installation between the transformer 310 and the combined electrical appliance 320. It includes: a flange body 110; the main body of the flange body 110 is an annular plate structure, and bolt holes 111 are provided on the flange so that bolts pass through the bolt holes 111 when the transformer 310 and the combined electrical appliance 320 are connected; a first insulating sealing layer 210 is provided on the end faces of both sides of the flange body 110 so that the contact surfaces on both sides of the flange body 110 match the contact surfaces of the transformer 310 and the combined electrical appliance 320; wherein, the flange body 110 includes two or more layers of fiberglass cloth; the two or more layers of fiberglass cloth are stacked, and a preset angle is provided between the fiber arrangement directions of each adjacent two layers of fiberglass cloth.

[0028] It should be noted that the design of the insulating flange 100 in the form of a ring-shaped plate structure helps to uniformly transmit pressure and torque, ensuring the stability of the connection, and at the same time, the ring-shaped structure can provide a larger contact area, making the connection between the transformer 310 and the combined electrical apparatus 320 more secure, dispersing the stress at the connection site and reducing the risk of damage caused by local stress concentration. When the transformer 310 and the combined electrical apparatus 320 are connected, the bolts can pass through the bolt holes 111 to achieve a stable connection between the transformer 310, the insulating flange 100 and the combined electrical apparatus 320. This connection method is convenient for installation and disassembly, and ensures that the insulating flange 100 will not loosen or displace due to vibration or other external forces during equipment operation; the first insulating sealing layer 210 is suitable for enhancing the insulation performance between the insulating flange 100 and the connected equipment, while reducing the surface roughness of the insulating flange 100. By reducing the small defects and uneven areas on the surface of the insulating flange 100, the first insulating sealing layer 210 can effectively prevent the phenomenon of electric field concentration, reduce the risk of insulation breakdown of the insulating flange 100, improve the insulation performance of the entire insulating flange 100, and ensure the safe operation of the power system; the first insulating sealing layer 210 makes the contact surfaces on both sides of the flange body 110 tightly fit with the contact surfaces of the transformer 310 and the combined electrical apparatus 320, respectively, so that after the transformer 310 and the combined electrical apparatus 320 are connected, it can effectively prevent the intrusion of external environmental factors into the flange body 110 and the transformer 310 and the combined electrical apparatus 320, thereby preventing a decrease in insulation performance.

[0029] The laminated arrangement of the glass fiber cloth layers can improve the compressive strength of the flange body 110, allowing the flange body 110 to better disperse stress when subjected to high pressure and reduce local stress concentration, thereby avoiding deformation or damage of the flange body 110 due to excessive pressure. The design of a predetermined angle between the fiber arrangement directions of each adjacent two layers of glass fiber cloth layers can uniformly disperse stress in different directions. When the flange body 110 is subjected to stress in multiple directions, the fibers arranged in different directions can jointly bear the stress, avoiding stress concentration in one direction. The glass fiber cloth itself has good insulation performance, and each layer of glass fiber cloth can block the penetration of the electric field to some extent. The fiber arrangement in different directions can effectively reduce the electric field concentration phenomenon, allowing the electric field to be uniformly distributed in different directions and reducing the risk of insulation breakdown, thereby improving the overall insulation performance of the flange body 110.

[0030] The flange body 110 of the insulating flange 100 is formed by stacking two or more layers of glass fiber cloth, and the fiber arrangement direction of each adjacent two layers of glass fiber cloth is designed with a preset angle, so that the flange body 110 can more effectively bear and disperse pressure load in all directions, greatly improving the pressure resistance of the insulating flange 100, avoiding the decrease of the insulation performance of the insulating flange 100 due to deformation, ensuring that the insulating flange 100 always maintains stable and reliable insulation performance, and protecting the normal operation of the transformer 310 and the combined electrical apparatus 320. At the same time, by arranging the first insulating sealing layer 210 on the two side end faces of the flange body 110, the insulation performance between the insulating flange 100 and the transformer 310 and the combined electrical apparatus 320 is further enhanced, the surface roughness of the insulating flange 100 is reduced, the electric field concentration phenomenon is reduced, and the risk of insulation breakdown is reduced.

[0031] In a possible implementation manner, the preset angle is in the range of 0°-90°.

[0032] Preferably, the preset angle is 45°.

[0033] In a possible implementation manner, the flange body 110 is a vacuum pressure impregnated epoxy glass cloth board. It should be noted that the vacuum pressure impregnated epoxy glass cloth board is obtained by impregnating the epoxy glass cloth layer in a vacuum environment and applying a certain pressure, so that the epoxy resin can fully penetrate into the fibers of the glass cloth layer to form a glass fiber reinforced structure, thereby improving the density and uniformity of the insulating flange 100. The glass fiber reinforced structure can effectively improve the compression strength and bending strength of the insulating flange 100, so that it is not easy to deform when bearing a large pressure; the insulating flange 100 made of the epoxy glass cloth board also has high mechanical strength and rigidity, and is not easy to deform or damage when bearing the mechanical stress during the connection of the transformer 310 and the combined electrical apparatus 320 and the external force during the operation, thereby ensuring the insulation performance of the insulating flange 100.

[0034] Further, the first insulating sealing layer 210 is ET-98 solvent-free epoxy impregnated paint, which is attached to the end faces of the two sides of the flange body 110 by using the existing spraying method.

[0035] In a possible implementation manner, the thickness of the flange body 110 is in the range of 10mm-20mm. The flange body 110 with a thickness of 10mm-20mm can provide sufficient bending strength, avoiding deformation or damage of the flange body 110 when subjected to a large pressure, thereby ensuring the insulation performance of the insulating flange 100.

[0036] Preferably, the thickness of the flange body 110 is 15mm.

[0037] In a possible implementation, the thickness of the first insulating sealing layer 210 is in a range from 2 mm to 3 mm. The thickness of 2 mm to 3 mm of the first insulating sealing layer 210 can effectively reduce the roughness of the surface of the flange body 110, reduce the small defects and uneven areas on the surface, ensure uniform distribution of the electric field on both end surfaces of the flange body 110, and reduce the risk of insulation breakdown.

[0038] Preferably, the thickness of the first insulating sealing layer 210 is 2.5 mm.

[0039] In a possible implementation, the second insulating sealing layer 220 is further included, and the second insulating sealing layer 220 is annularly arranged at the outer circumferential surface of the flange body 110. It should be noted that the second insulating sealing layer 220 is used to provide an additional insulating layer for the flange body 110, and cooperates with the first insulating sealing layer 210 to further enhance the overall insulation performance of the insulating flange 100. The multi-layer insulation design can effectively reduce the electric field concentration phenomenon, reduce the risk of insulation breakdown, avoid the risk of surface discharge or electric leakage between the transformer 310 and the combined electrical apparatus 320, and thus improve the safety and stability of the entire power system.

[0040] Further, the second insulating sealing layer 220 is ET-98 solvent-free epoxy impregnating paint, which is attached to the outer circumferential surface of the flange body 110 by using the existing spraying method.

[0041] In a possible implementation, the thickness of the second insulating sealing layer 220 is in a range from 0.2 mm to 0.4 mm.

[0042] Preferably, the thickness of the second insulating sealing layer 220 is 0.3 mm.

[0043] In a possible implementation, the bolt hole 111 is provided in two or more than two. The two or more than two bolt holes 111 are arranged at intervals along the circumference of the flange body 110. It should be noted that the design that the bolt holes 111 are arranged at intervals along the circumference of the flange body 110 can ensure uniform distribution of the fastening force of the bolts when the transformer 310 and the combined electrical apparatus 320 are connected, so that the insulating flange 100 is more balanced when bearing pressure, and deformation or damage caused by local stress concentration is avoided, thereby ensuring the stability and reliability of the connection.

[0044] Preferably, the bolt hole 111 is provided in twelve, and the twelve bolt holes 111 are arranged at equal intervals along the circumference of the flange body 110.

[0045] Having described various embodiments of the application, it is to be understood that the above description is meant not to limit and not to encompass all of the possible embodiments. Many modifications and variations of this application can be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. It is intended that the scope of the application be defined by the scope of the patent and by the claims as allowed by the patent office, which can include adaptations based on the description, equivalents, and / or substitutions of elements individually or collectively to the entire disclosure.

Claims

1. An insulating flange suitable for mounting between a transformer and a switchgear, characterized in that, Comprise: Flange body; The main body of the flange body is in the form of a ring plate structure, and bolt holes are formed in the flange so that bolts pass through the bolt holes when the transformer is connected with the combined electrical appliance; The end faces of the flange body on both sides are provided with a first insulating sealing layer so that the contact surfaces of the flange body on both sides match the contact surfaces of the transformer and the combined electrical appliance; The flange body comprises two or more layers of glass fiber cloth layers; the two or more layers of glass fiber cloth layers are arranged in a stack, and a preset angle is provided between the fiber arrangement directions of each two adjacent layers of glass fiber cloth layers.

2. The insulated flange of claim 1, wherein, The preset angle is in the range of 0°-90°.

3. The insulated flange of claim 1, wherein, The thickness of the flange body is in the range of 10mm-20mm.

4. The insulated flange of claim 1, wherein, The thickness of the first insulating sealing layer is in the range of 2mm-3mm.

5. The insulated flange of claim 1, wherein, Further comprising a second insulating sealing layer; The second insulating sealing layer is annularly arranged at the outer circumferential surface of the flange body.

6. The insulated flange of claim 5, wherein, The thickness of the second insulating sealing layer is in the range of 0.2mm-0.4mm.

7. The insulated flange of claim 1, wherein, The bolt holes are two or more; The two or more bolt holes are arranged at intervals along the circumference of the flange body.

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