Sleeve connector
By using a design in which conductive rods and conductors are connected by threaded blocks and bolts in the casing connector, the problem of difficult to guarantee the welding quality of copper alloy materials is solved, better mechanical performance and current carrying performance are achieved, and production costs are reduced.
Patent Information
- Application Number
- CN202422093541.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-28
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-08-28
AI Technical Summary
In existing casing connectors, the welding quality of conductive rods of copper alloy materials is difficult to ensure, resulting in a decrease in the mechanical properties and current-carrying properties of the weld area.
The design of the conductive rod and the conductor is connected by threaded blocks and bolts instead of the traditional welding process to ensure the stable connection between the end of the conductive rod and the conductor.
This design avoids the mechanical and current-carrying performance degradation caused by welding, improves the overall performance of the casing connector, and simplifies the assembly process and reduces costs.
Smart Images
Figure CN223023659U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a bushing connector assembled to a switchgear for realizing electrical connection between the switchgear and an overhead line. Background Art
[0002] A variety of high-voltage switchgears (such as GIS - Gas Insulated Metal Enclosed Switchgear) need to be electrically connected to an overhead line through a bushing connector. The bushing connector includes, for example, an external insulating bushing made of a composite material such as ceramics or silicone rubber, and a conductive rod extending inside the insulating bushing. The conductive rod is usually made of a copper alloy material and is electrically connected by welding to a conductor (such as a conductive end plate or an adapter) provided at the end of the bushing connector. However, the slender structure of the conductive rod and the copper alloy material result in difficulties and defects in welding.
[0003] In particular, both manufacturer feedback and tests can prove that it is difficult to ensure the welding quality of the copper alloy material. The mechanical properties of the weld area are significantly degraded and are difficult to improve. More specifically, the weld area of the copper alloy material has poor compactness, for example, a honeycomb structure will be formed, resulting in poor mechanical strength and a large resistance in this area. When a very high short-time current passes through, the temperature will rise sharply and the weld may melt. Summary of the Utility Model
[0004] The purpose of the utility model is to provide a bushing connector that ensures good mechanical properties and current-carrying performance at the connection position of the conductive rod by avoiding the use of a welding process.
[0005] To this end, the utility model provides a bushing connector, including: a conductive rod, an insulating bushing surrounding the conductive rod, and a conductor connected to at least one end of the conductive rod, wherein the conductive rod includes a threaded block provided in the at least one end, the threaded block is provided with a threaded hole, and the conductor is provided with a through hole aligned with the threaded hole and a contact portion protruding outward in the radial direction of the conductive rod, so that the conductor is connected to the threaded block by a bolt passing through the threaded hole and the through hole along the axial direction of the conductive rod, and the contact portion abuts against the end face of the conductive rod along the axial direction of the conductive rod to achieve electrical connection.
[0006] According to the above technical concept, the utility model may further include any one or more of the following optional forms.
[0007] In some optional forms, the at least one end of the conductive rod is threadedly connected to the threaded block.
[0008] In some alternative forms, the conductor includes an extension portion that extends axially along the conductive rod from the abutting surface of the abutting portion that abuts against the end face and extends into the end of the conductive rod.
[0009] In some alternative forms, the extension portion includes a top surface oriented towards the threaded block and a side surface oriented towards the inner wall of the conductive rod. The bottom of the side surface connected to the abutting surface forms a recess that is recessed inward in the radial direction of the conductive rod.
[0010] In some alternative forms, the conductive rod is made of a copper alloy material.
[0011] In some alternative forms, the conductive rod and the conductor are made of different materials.
[0012] In some alternative forms, the first end of the conductive rod is adapted to be electrically connected to an overhead line, and the second end of the conductive rod is adapted to be electrically connected to a switching device.
[0013] In some alternative forms, the sleeve connector further includes a first end plate and a second end plate respectively connected to both ends of the insulating sleeve. Among them, the first end plate is electrically connected to the first end of the conductive rod through the conductor.
[0014] In some alternative forms, the first end plate is bolted to the conductor.
[0015] Compared with the prior art, the sleeve connector according to the present utility model has multiple beneficial technical effects. In particular: the sleeve connector is designed such that the end of the conductive rod is bolted to the conductor through a threaded block, replacing the welding process used in existing sleeve connectors, thus avoiding the defects of the decline in mechanical properties and current-carrying performance caused by welding; in addition, the sleeve connector itself has a simple structure, is convenient to assemble, and has a low cost, so it has a wide range of application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Other features and advantages of the present utility model will be better understood through the following preferred embodiments described in detail in conjunction with the drawings, in which the same reference numerals represent the same or similar components.
[0017] Figure 1 is a cross-sectional view of an embodiment of a sleeve connector according to the present utility model.
[0018] Figure 2 is Figure 1 an enlarged cross-sectional view of the connection positions at both ends of the conductive rod of the sleeve connector in
[0019] Figure 3 is Figure 2Cross-sectional view of the second end of the conductive rod in
[0020] Figure 4 is Figure 2 Cross-sectional view of the assembled second end of the conductive rod and the conductor in
[0021] The elements in the drawings are shown for simplicity and clarity and are not necessarily drawn to an exact scale. It should be understood that these drawings can be used not only for the interpretation and illustration of the present utility model, but also for the limitation of the present utility model when necessary. Detailed Description of the Preferred Embodiments
[0022] The implementation and use of the embodiments will be discussed in detail below. However, it should be understood that the specific embodiments discussed are only exemplary illustrations of the specific ways of implementing and using the present utility model, and do not limit the scope of protection of the present utility model.
[0023] In this document, "axial direction" and "radial direction" are defined with reference to the axial and radial directions of the shown conductive rod and the insulating sleeve surrounding the conductive rod.
[0024] As Figure 1 shown, the bushing connector BC according to the present utility model mainly includes: a conductive rod 200, an insulating sleeve 100 surrounding the conductive rod 200, and a first end plate 610 and a second end plate 620 respectively connected to both ends of the insulating sleeve 100. Among them, the first end 210 of the conductive rod 200 is electrically connected to the first end plate 610 through a first conductor 410, and then electrically connected to an external overhead line through the first end plate 610. The second end 220 of the conductive rod 200 is electrically connected to a switchgear (such as GIS) through a second conductor 420.
[0025] The materials of the conductive rod 200 and the insulating sleeve 100 are not restrictive. As non-limiting examples, the conductive rod 200 is made of, for example, a copper alloy material, and the insulating sleeve 100 is made of, for example, a composite material such as ceramics or silicone rubber. Moreover, the space between the conductive rod 200 and the insulating sleeve 100 is filled with an insulating gas, such as sulfur hexafluoride (SF6).
[0026] A first connection flange 710 is provided on the outer side of the first end of the insulating sleeve 100 to connect the first end plate 610 to the first end of the insulating sleeve 100 through a plurality of bolts passing through the first end plate 610 and the first connection flange 710. A second connection flange 720 is provided on the outer side of the second end of the insulating sleeve 100 to connect the second end plate 620 to the second end of the insulating sleeve 100 through a plurality of bolts passing through the second end plate 620 and the second connection flange 720.
[0027] Next, with the aid of Figures 2 to 4Describe in detail the specific structures and connection methods of the two ends 210 and 220 of the conductive rod 200 and the corresponding conductors 410 and 420. It can be understood that in the illustrated embodiment, the connection method of the first end 210 of the conductive rod 200 to the first conductor 410 is similar to the connection method of the second end 220 of the conductive rod 200 to the second conductor 420. Therefore, the following mainly describes the specific structure of the second end 220 of the conductive rod 200 and the second conductor 420. Of course, only one end of the conductive rod 200 and the corresponding conductor can be set to this structure, and it also belongs to the protection scope of the present utility model.
[0028] As Figures 2 to 4 shown, the conductive rod 200 includes a first threaded block 310 and a second threaded block 320 respectively disposed within its first end 210 and second end 220. Among them, the first threaded block 310 is connected to the first conductor 410 by a first bolt 510, and the second threaded block 320 is connected to the second conductor 420 by a second bolt 520.
[0029] Taking the structure at the second end 220 of the conductive rod 200 as an example, the second end 220 of the conductive rod 200 is provided with an internal thread 221, and the outer side of the second threaded block 320 is provided with an external thread 321, so that the second threaded block 320 can be screwed into the second end 220 of the conductive rod 200. A threaded hole 322 is provided at the center of the second threaded block 320, and a receiving portion 222 is left between the second threaded block 320 and the end face 223 of the second end 220 of the conductive rod 200.
[0030] The second conductor 420 abuts against the second end 220 of the conductive rod 200 and is connected to the second threaded block 320. More specifically, the second conductor 420 is provided with a first through hole 421 aligned with the threaded hole 322 of the second threaded block 320, and a contact portion 422 protruding outward in the radial direction of the conductive rod 200, so that the second conductor 420 can be connected to the second threaded block 320 by a second bolt 520 passing through the threaded hole 322 and the first through hole 421 along the axial direction of the conductive rod 200 (that is, the second bolt 520 includes a first section 521 screwed into the threaded hole 322 and a second section 522 passing through the first through hole 421), and after tightening the second bolt 520, the contact surface 424 of the contact portion 422 of the second conductor 420 can be tightly abutted against the end face 223 of the conductive rod 200 along the axial direction of the conductive rod 200 to achieve the electrical connection between the conductive rod 200 and the second conductor 420.
[0031] In addition, the second conductor 420 further includes an extension portion 423 which extends from the abutting surface 424 of the abutting portion 422 (abutting against the end face 223 of the conductive rod 200) along the axial direction of the conductive rod 200 and extends into the receiving portion 222 of the second end portion 220 of the conductive rod 200 to contact the inner wall of the conductive rod 200, thereby achieving the radial positioning of the conductive rod 200 and the second conductor 420.
[0032] For the first conductor 410, as mentioned before, the structures of the first through hole 411, the abutting portion 412 and the extension portion 413 of the first conductor 410 are similar to the corresponding parts of the second conductor 420, so the description will not be repeated here. In addition, a plurality of second through holes 414 are provided at the end of the first conductor 410 opposite to the extension portion 413 so as to be connected to the first end plate 610 through a plurality of bolts passing through these second through holes 414.
[0033] Therefore, during the assembly process of the sleeve connector BC, the bolt connection replaces the welding process used in the existing sleeve connectors, thus avoiding defects such as the decline in mechanical properties and current-carrying performance caused by the welding of copper alloy materials. It can be understood that, different from the limitations brought by the welding process, the conductive rod 200 and the conductors 410, 420 in the sleeve connector BC can be made of the same material or different materials.
[0034] In addition, especially as Figure 3 and Figure 4 shown, the extension portion 423 of the second conductor 420 includes a top surface 425 oriented towards the second threaded block 320 and a side surface 426 oriented towards the inner wall of the conductive rod 200. The bottom of the side surface 426 (connected to the abutting surface 424 of the abutting portion 422) preferably forms a recessed portion 427 which is, for example, substantially semi-circular in shape and recessed inward along the radial direction of the conductive rod 200. The extension portion 413 of the first conductor 410 may have a similar structure.
[0035] It can be understood that if it is designed such that the side surface 426 of the extension portion 423 is completely perpendicular to the abutting surface 424 of the abutting portion 422, that is, the side surface 426 and the abutting surface 424 form a right-angle included angle, it is difficult to precisely machine the toe region of this right angle during manufacturing. Therefore, a chamfer needs to be machined at the inner end of the end surface 223 of the second end portion 220 of the conductive rod 200 to avoid interference with the second conductor 420 at this position. Without increasing the thickness of the conductive rod 200, the setting of the chamfer will reduce the contact area between the end surface 223 of the conductive rod 200 and the abutting surface 424 of the second conductor 420, resulting in poor current-carrying performance. According to the present utility model, through the setting of the above-mentioned recessed portion 427, it is not necessary to reduce the area of the end surface 223 of the conductive rod 200, so that good current-carrying performance can be ensured without changing the thickness of the conductive rod 200.
[0036] The technical content and technical features of the present utility model have been disclosed above. However, it can be understood that under the creative concept of the present utility model, those skilled in the art can make various changes and improvements to the above-disclosed concept, but all fall within the protection scope of the present utility model.
[0037] The description of the above embodiments is illustrative rather than restrictive, and the protection scope of the present utility model is determined by the claims.
Claims
1. A sleeve connector, comprising: A conductive rod (200), an insulating sleeve (100) surrounding the conductive rod (200), and a conductor (410, 420) connected to at least one end (210, 220) of the conductive rod (200), characterized in that the conductive rod (200) comprises a threaded block (310, 320) arranged in the at least one end (210, 220), the threaded block (310, 320) is provided with a threaded hole (322), and the conductor (410, 420) is provided with a through hole (411) aligned with the threaded hole (322). , 421) and an abutment portion (412, 422) protruding outwardly in the radial direction of the conductive rod (200), so that the conductor (410, 420) is connected to the threaded block (310, 320) through a bolt (510, 520) passing through the threaded hole (322) and the through hole (411, 421) in the axial direction of the conductive rod (200), and the abutment portion (412, 422) abuts against the end face (223) of the conductive rod (200) in the axial direction of the conductive rod (200) to achieve electrical connection.
2. The sleeve connector according to claim 1, characterized in that: The at least one end portion (210, 220) of the conductive rod (200) is threadedly connected to the threaded block (310, 320).
3. The sleeve connector according to claim 1, characterized in that: The conductor (410, 420) comprises an extension portion (413, 423), wherein the extension portion (413, 423) extends from an abutting surface (424) of the abutting portion (412, 422) abutting against the end surface (223) along the axial direction of the conductive rod (200) and extends into the end portion (210, 220) of the conductive rod (200).
4. The sleeve connector according to claim 3, characterized in that: The extension portion (413, 423) comprises a top surface (425) oriented toward the threaded block (310, 320) and a side surface (426) oriented toward the inner wall of the conductive rod (200), and a bottom of the side surface (426) connected to the abutment surface (424) forms a recessed portion (427) recessed inwardly along the radial direction of the conductive rod (200).
5. The sleeve connector according to any one of claims 1 to 4, characterized in that: The conductive rod (200) is made of copper alloy material.
6. The sleeve connector according to any one of claims 1 to 4, characterized in that: The conductive rod (200) and the conductors (410, 420) are made of different materials.
7. The sleeve connector according to any one of claims 1 to 4, characterized in that: The first end (210) of the conductive rod (200) is suitable for being electrically connected to an overhead line, and the second end (220) of the conductive rod (200) is suitable for being electrically connected to a switchgear.
8. The sleeve connector according to any one of claims 1 to 4, characterized in that: The sleeve connector also includes a first end plate (610) and a second end plate (620) respectively connected to two ends of the insulating sleeve (100), wherein the first end plate (610) is electrically connected to the first end portion (210) of the conductive rod (200) through the conductor.
9. The sleeve connector according to claim 8, characterized in that: The first end plate (610) is connected to the conductor bolts.