Lateral expansion sleeve for insulated switch cabinet

Abstract

The utility model discloses a side expansion sleeve for an insulation switch cabinet, and the sleeve comprises a sleeve body which is of a cylindrical structure, a conductor is embedded along the central axis of the sleeve body, the cylindrical structure is provided with a plurality of insulation sleeve rings used for increasing the creepage distance, any end of the sleeve body is provided with an isolation cover, the isolation cover is of a U-shaped structure, and the insulation sleeve rings are provided with insulation sleeves. One end, far away from the isolation cover, of the sleeve body is provided with a threaded bushing used for accommodating a screw, one end, close to the threaded bushing, of the sleeve body is provided with a long kidney-shaped umbrella skirt, and the long kidney-shaped umbrella skirt is used for isolating the side wall of the insulated switch cabinet from a bus copper bar. According to the side expansion sleeve for the insulation switch cabinet, the long kidney-shaped umbrella skirt is arranged at the position close to the mounting surface of the sleeve body, so that the bus copper bar lapped with the sleeve body is separated from the side plate of the side expansion sleeve for the insulation switch cabinet, and the insulation performance is further enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of high-voltage switchgear of an electric power system, in particular to a side expansion bushing for an insulating switch cabinet. Background Art

[0002] With the continuous development of power systems, higher requirements are placed on the safety and reliability of high-voltage switchgear. As a key equipment in the power system, the insulation performance of the side expansion bushing for insulating switchgear directly affects the operating life of the equipment and the safety and stability of the power grid. The design of traditional side expansion bushings for insulating switchgear often relies on experience accumulation and local modifications, and there are problems such as long design cycle, low efficiency, and difficult performance guarantee.

[0003] In addition, with the continuous growth of electricity demand and the increasing complexity of power grid structure, higher requirements are placed on the insulation performance, space utilization and intelligence level of side expansion bushings used in insulated switchgear.

[0004] The surface creepage distance of the side expansion bushing for the existing 10kV environmental protection cabinet for insulating switchgear meets the requirements, but the vertical distance between the lap joint surface of the side expansion bushing for insulating switchgear connected to the busbar copper bar and the side plate where the side expansion bushing for insulating switchgear is installed is less than 125mm, generally between 90-95mm. The safety distance of 10kV voltage level requires at least 125mm, resulting in the size of the busbar copper bar connected to the side expansion bushing for insulating switchgear being limited and cannot exceed the end face of the side expansion bushing for insulating switchgear. Otherwise, the air insulation distance between the busbar copper bar and the side plate of the gas box will be less than 125mm, which will lead to a decrease in insulation performance. Utility Model Content

[0005] In order to solve the problem of insufficient insulation performance of a side expansion bushing for an insulating switch cabinet in the prior art, the present application provides a side expansion bushing for an insulating switch cabinet.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted in the present application is: a side expansion bushing for an insulating switch cabinet, comprising: a bushing body, the bushing body is a columnar structure, a conductor is embedded along the central axis of the bushing body, a plurality of insulating rings for increasing the creepage distance are arranged on the columnar structure, an isolation cover is arranged at either end of the bushing body, the isolation cover is a U-shaped structure, a threaded bushing for accommodating a screw is arranged at one end of the bushing body away from the isolation cover, a long waist-shaped umbrella skirt is arranged at one end of the bushing body close to the threaded bushing, and the long waist-shaped umbrella skirt is used to isolate the side wall of the insulating switch cabinet and the busbar copper bar.

[0007] In some embodiments of the utility model, a threaded hole is provided at one end of the conductor close to the isolation cover, and the threaded hole is used to penetrate a screw, and the screw is used to connect the busbar copper bar to the conductor.

[0008] In some embodiments of the present invention, the insulating collar, the isolation cover, the long waist-shaped umbrella skirt and the sleeve body are integrally formed.

[0009] In some embodiments of the present invention, a sealing groove for installing a sealing ring is provided on one side of the bushing body abutting against the insulating switch cabinet.

[0010] In some embodiments of the present invention, the outer wall of the conductor has a corrugated groove, and the corrugated groove is adapted to the corrugated block on the inner wall of the insulating ring.

[0011] Beneficial effects:

[0012] 1. The outer wall of the bushing body is provided with an insulating collar, which can effectively increase the creepage distance, improve the insulation performance and safety of the equipment, prevent creepage from occurring in moisture and pollution, and thus avoid electrical failures and personal safety accidents.

[0013] 2. A long waist-shaped umbrella skirt is provided near the installation surface of the bushing body, so that the busbar copper bar overlapped by the bushing body is separated from the side plate of the side expansion bushing for the insulating switch cabinet, further enhancing the insulation performance.

[0014] 3. An isolation cover is added to the top of the bushing body to isolate the busbar copper bar overlapped by the bushing body from the top plate of the side expansion bushing for the insulating switch cabinet, thereby enhancing the insulation performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative labor.

[0016] Figure 1 The structure of the embodiment of the present application is shown in FIG. Figure 1 ;

[0017] Figure 2 The structure of the embodiment of the present application is shown in FIG. Figure 2 ;

[0018] Figure 3 An exploded diagram of an embodiment of the present application;

[0019] Figure 4 It is a cross-sectional view of an embodiment of the present application.

[0020] In the figure: 1- bushing body; 2- conductor; 3- insulating collar; 4- isolating cover; 5- threaded bushing; 6- long waist-shaped umbrella skirt; 7- threaded hole; 8- sealing groove; 9- corrugated block; 10- corrugated groove. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0023] 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.

[0024] In the description of this application, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the product of the application is usually placed when in use. It is only for the convenience of describing this application 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 operate in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, if the terms "first", "second", etc. appear in the description of this application, they are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0025] In addition, if the terms "horizontal" or "vertical" appear in the description of this application, it does not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0026] In the description of this application, it should also be noted 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 connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0027] Example

[0028] Please refer to Figure 1-Figure 4 The present embodiment provides a side expansion bushing for an insulating switch cabinet, comprising: a bushing body 1, the bushing body 1 is a columnar structure, a conductor 2 is embedded along the central axis of the bushing body 1, a plurality of insulating collars 3 for increasing the creepage distance are arranged on the columnar structure, an isolation cover 4 is arranged at either end of the bushing body 1, the isolation cover 4 is a U-shaped structure, a threaded bushing 5 for accommodating a screw is arranged at one end of the bushing body 1 away from the isolation cover 4, and a long waist-shaped shed 6 is arranged at one end of the bushing body 1 close to the threaded bushing 5, and the long waist-shaped shed 6 is used to isolate the side wall of the insulating switch cabinet and the busbar copper bar.

[0029] In this embodiment, the bushing body 1 is made of a high-strength, high-insulation columnar material, and a conductor 2 is embedded along the central axis thereof for transmitting power. This structural design not only ensures the stability of current transmission, but also provides a solid foundation for subsequent insulation reinforcement measures.

[0030] In this embodiment, a plurality of insulating collars 3 are provided on the column structure of the bushing body 1. The plurality of insulating collars 3 are evenly distributed to increase the creepage distance of the bushing surface, effectively prevent the occurrence of surface discharge in a humid or polluted environment, and thus significantly improve the insulation performance of the equipment.

[0031] In this embodiment, a U-shaped isolation cover 4 is provided at one end of the bushing body 1. The isolation cover 4 not only protects the bushing body 1 from direct erosion by the external environment, but also further extends the electrical gap and enhances the overall insulation effect through its special design.

[0032] In this embodiment, a threaded bushing 5 is provided at one end of the bushing body 1 away from the isolation cover 4. The threaded bushing 5 is specially designed to accommodate screws, which is convenient for fixing during installation and maintenance. At the same time, the threaded bushing 5 also serves as a part of the insulating component, thereby enhancing the insulation strength of this area.

[0033] In this embodiment, a long waist-shaped umbrella skirt 6 is provided at one end of the bushing body 1 close to the threaded bushing 5, so that the busbar copper bar overlapped by the bushing body 1 is isolated from the side plate of the side expansion bushing for the insulating switch cabinet, thereby enhancing the insulation performance.

[0034] Please refer to Figure 1 and Figure 3 In some implementations of the present embodiment, a threaded hole 7 is provided at one end of the conductor 2 close to the isolation cover 4, and the threaded hole 7 is used to penetrate a screw, and the screw is used to connect the busbar copper bar to the conductor 2.

[0035] In this embodiment, the conductor 2 is embedded in the bushing body 1, and a threaded hole 7 is provided at one end close to the isolation cover 4. The threaded hole 7 is used to pass a screw, and the screw abuts the busbar copper bar against the conductor 2 to achieve electrical connection.

[0036] Please refer to Figure 1-Figure 4 In some implementations of the present embodiment, the insulating ring 3, the isolation cover 4, the long waist-shaped umbrella skirt 6 and the sleeve body 1 are integrally formed.

[0037] In this embodiment, the long waist-shaped shed 6, the insulating collar 3, the isolation cover 4, the long waist-shaped shed 6 and the sleeve body 1 are manufactured by an integrated molding process. This design not only simplifies the production process, but also improves the bonding strength between the components and enhances the overall performance of the equipment.

[0038] Please refer to Figure 2 and Figure 4 In some implementations of this embodiment, a sealing groove 8 for installing a sealing ring is provided on one side of the bushing body 1 that abuts against the insulating switch cabinet.

[0039] In this embodiment, the sealing groove 8 is used to install and accommodate a sealing strip, thereby increasing the sealing effect between the bushing body 1 and the side expansion bushing for the insulating switch cabinet, so as to ensure the sealing between the equipment and the insulating switch cabinet.

[0040] Please refer to Figure 3 and Figure 4 In some implementations of this embodiment, the outer wall of the conductor 2 has a corrugated groove 10 , and the corrugated groove 10 is adapted to the corrugated block 9 on the inner wall of the insulating ring 3 .

[0041] In this embodiment, the outer wall of the conductor 2 is designed with corrugated grooves 10, which are matched with the corrugated blocks 9 on the inner wall of the insulating sleeve 3, thereby enhancing the bonding force between the conductor 2 and the insulating sleeve and improving the overall insulation performance.

[0042] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A side expansion bushing for an insulating switch cabinet, characterized in that: include: A bushing body (1), the bushing body (1) being a columnar structure, a conductor (2) being embedded along the central axis of the bushing body (1), a plurality of insulating collars (3) being arranged on the columnar structure for increasing the creepage distance, an isolation cover (4) being arranged at either end of the bushing body (1), the isolation cover (4) being a U-shaped structure, a threaded bushing (5) being arranged at one end of the bushing body (1) away from the isolation cover (4) for accommodating a screw, and a long waist-shaped shed (6) being arranged at one end of the bushing body (1) close to the threaded bushing (5), the long waist-shaped shed (6) being arranged for isolating the side wall of the insulating switch cabinet and the busbar copper bar.

2. The side expansion bushing for insulating switch cabinet according to claim 1, characterized in that: A threaded hole (7) is provided at one end of the conductor (2) close to the isolation cover (4), and the threaded hole (7) is used to pass a screw, and the screw is used to abut the busbar copper bar against the conductor (2).

3. The side expansion bushing for insulating switch cabinet according to claim 1, characterized in that: The insulating sleeve ring (3), the isolation cover (4), the long waist-shaped umbrella skirt (6) and the sleeve body (1) are integrally formed.

4. The side expansion bushing for insulating switch cabinet according to claim 1, characterized in that: A sealing groove (8) for installing a sealing ring is provided on one side of the bushing body (1) abutting against the insulating switch cabinet.

5. The side expansion bushing for insulating switch cabinet according to claim 1, characterized in that: The outer side wall of the conductor (2) has a corrugated block (9), and the corrugated block (9) is adapted to the corrugated groove (10) of the inner side wall of the insulating sleeve (3).

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