All-insulation incoming and outgoing line sleeve

Abstract

The utility model discloses an all-insulation incoming and outgoing line bushing, which comprises an incoming and outgoing line bushing, a lead bushing and a lead, and is characterized in that the lead bushing comprises a lead bushing body, a lead sleeve head integrally formed above the lead bushing body, and a soft insulation plug positioned at one end, facing the incoming and outgoing line bushing, of the lead bushing body; the thread copper rod is located in the wire sleeve body, the nut is screwed into the thread copper rod, the thread copper rod is sleeved with the gasket, and the rigid insulation plug is embedded into the wire sleeve body. According to the utility model, through the interference fit between the soft insulation plug and the outer umbrella skirt and the interference fit between the rigid insulation plug and the wire sleeve body, multiple anti-leakage protection is realized, the insulation distance between the wire inlet and outlet sleeve and the wire sleeve and the side plate of the gas tank is reduced, in addition, the gasket and the nut are combined to prevent the wire from deforming, the current conduction stability is ensured, and the service life is prolonged. Therefore, the balance of installation convenience, environmental adaptability and cost controllability is realized while the all-insulation performance is ensured.

Description

Technical Field

[0001] This utility model specifically relates to a fully insulated inlet and outlet bushing. Background Technology

[0002] The bushings for the gas-filled ring main unit (RMM) are designed with full insulation and sealing. As a crucial intermediate unit connecting the high-voltage switch unit inside the RMM to the incoming and outgoing cables, the bushings must not only meet the corresponding insulation and mechanical performance requirements but also prevent leakage of insulating gas when installed on the RMM. Therefore, the external dimensions of the bushing conform to the requirements of the cable plug-in elbow type, while the internal design of the bushing meets the insulation performance requirements of the RMM, and it is typically connected to the copper busbar.

[0003] Currently, dry air environmentally friendly gas-insulated ring main units are widely used in the power grid, and the domestic power grid has conducted a large number of tenders and procurements. However, the insulation performance of dry air cannot surpass the original SF6 gas insulation performance. Therefore, the minimum cabinet width requirement of SF6 has not yet been met in the existing ring main units. Similarly, the minimum cabinet width requirement of the incoming and outgoing bushings in the dry air insulation environment has not yet been met. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a fully insulated inlet and outlet bushing.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A fully insulated inlet / outlet bushing includes an inlet / outlet bushing, a conductor bushing fixedly installed with the inlet / outlet bushing, a conductor inserted into the conductor bushing and fixedly installed with the conductor bushing, the conductor bushing including a conductor bushing body, a conductor sleeve integrally formed on top of the conductor bushing body to facilitate insertion of the conductor into the conductor bushing body, a flexible insulating plug located at one end of the conductor bushing body facing the inlet / outlet bushing, a threaded copper rod located inside the conductor bushing body and screwed into the inlet / outlet bushing after passing through the conductor and the flexible insulating plug, a nut screwed into the threaded copper rod to limit conductor slippage, a washer fitted onto the threaded copper rod to prevent the conductor from deforming due to contact compression, and a rigid insulating plug embedded in the conductor bushing body and assembled with the threaded copper rod.

[0007] Preferably, the threaded copper rod has a long and thin stud end at one end facing the inlet and outlet sleeve, and a short and thick stud end at the other end.

[0008] Preferably, both the flexible insulating plug and the rigid insulating plug are tapered.

[0009] Preferably, the inlet / outlet bushing includes an inlet / outlet bushing body, an installation flange integrally formed with the inlet / outlet bushing body, round holes opened at the four corners of the installation flange, a threaded post integrally formed with the installation flange and communicating with the inlet / outlet bushing body, and an outer umbrella skirt with one end abutting against the installation flange and covering the threaded post.

[0010] Furthermore, a corrugated section is provided at the end of the outer umbrella skirt near the mounting flange.

[0011] Preferably, the conductor includes a conductor body, a lower connector disposed at the lower end of the conductor body, and an upper connector disposed at the upper end of the conductor body.

[0012] The beneficial effects of this utility model are as follows: This utility model achieves multiple leak-proof protection and reduces the insulation distance between the inlet and outlet bushings, the wire bushing and the gas box side plate by using the interference fit between the soft insulating plug and the outer umbrella skirt, and the rigid insulating plug and the wire bushing body. In addition, the combination of washer and nut prevents wire deformation and ensures the stability of current conduction. Therefore, while ensuring full insulation performance, it achieves a balance between ease of installation, environmental adaptability and cost control. Attached Figure Description

[0013] Figure 1 This is a structural diagram of a fully insulated inlet and outlet bushing according to the present invention;

[0014] Figure 2 for Figure 1 Exploded view; Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention.

[0016] Example

[0017] A fully insulated inlet and outlet bushing, such as Figure 1-2 As shown, it includes an inlet / outlet sleeve 1, a wire sleeve 2 fixedly installed with the inlet / outlet sleeve 1, and a wire 3 inserted into the wire sleeve 2 and fixedly installed with the wire sleeve 2.

[0018] The inlet / outlet bushing 1 includes an inlet / outlet bushing body 11, an installation flange 12 integrally formed with the inlet / outlet bushing body 11, round holes 13 opened at the four corners of the installation flange 12, a threaded post 14 integrally formed with the installation flange 12 and communicating with the inlet / outlet bushing body 11, and an outer umbrella skirt 15 that abuts against the installation flange 12 and covers the threaded post 14. The conductor sleeve 2 includes a conductor sleeve body 21, a conductor sleeve head 22 integrally formed on top of the conductor sleeve body 21 for easy insertion of the conductor 3 into the conductor sleeve body 21, a flexible insulating plug 23 located at the end of the conductor sleeve body 21 facing the inlet / outlet sleeve 1, a threaded copper rod 24 located inside the conductor sleeve body 21 and passing through the conductor 3 and the flexible insulating plug 23 before being screwed into the inlet / outlet sleeve 1, a nut 25 screwed into the threaded copper rod 24 to limit the sliding of the conductor 3, a washer 26 fitted onto the threaded copper rod 24 to prevent the conductor 3 from deforming due to contact compression, and a rigid insulating plug 27 embedded in the conductor sleeve body 21 and assembled with the threaded copper rod 24.

[0019] In this embodiment, the outer umbrella skirt 15 is provided with a corrugated section 151 at one end near the mounting flange 12. Specifically, when the slender stud end 241 of the threaded copper rod 24 is screwed into the threaded hole stud 14 for locking, the soft insulating plug 2 is squeezed against the outer umbrella skirt 15. The outer umbrella skirt 15 can buffer part of the compressive force by using the corrugated section 151, which can prevent the outer umbrella skirt 15 from being cracked, thereby affecting the wiring.

[0020] The threaded copper rod 24 has a slender stud end 241 at one end facing the inlet / outlet sleeve 1 and a short stud end 242 at the other end. Specifically, after screwing on the nut 25, the slender stud end 241 is fitted with a washer, then passes through the lower connector 32 of the wire 3, and finally screws into the screw hole 14 for fixation. The rigid insulating plug 27 is embedded in the wire sleeve body 21 and assembled with the short stud end 242, so that the entire wire sleeve 2 and the wire 3 are fixedly installed with the inlet / outlet sleeve 1.

[0021] In this embodiment, both the flexible insulating plug 23 and the rigid insulating plug 27 are tapered. During installation, the slender stud end 241 of the threaded copper rod 24 passes through the flexible insulating plug 23 and is fitted by it. When the slender stud end 241 of the threaded copper rod 24 is screwed into the screw hole 14 for locking, the flexible insulating plug 23 is pre-pressed. The tapered flexible insulating plug 23 and the outer umbrella skirt 15 have an interference fit to prevent current leakage. When the rigid insulating plug 27 is embedded in the conductor sleeve body 21 and assembled with the thick and short stud end 242, not only is the entire conductor sleeve 2 and conductor 3 fixedly installed with the inlet and outlet sleeve 1, but the tapered rigid insulating plug 27 also has an interference fit with the conductor sleeve body 21, thereby preventing current leakage. Finally, the threaded copper rod 24 is connected to the inlet and outlet sleeve 1 and the conductor sleeve 2 in the air box to achieve a fully insulated and fully sealed effect.

[0022] The conductor 3 includes a conductor body 31, a lower connector 32 disposed at the lower end of the conductor body 31, and an upper connector 33 disposed at the upper end of the conductor body 31.

[0023] The above embodiments of this utility model are not intended to limit the scope of protection of this utility model. The implementation of this utility model is not limited thereto. All other modifications, substitutions or alterations made to the above structure of this utility model based on the above content of this utility model and in accordance with the common technical knowledge and conventional means in the field, without departing from the basic technical idea of ​​this utility model, shall fall within the scope of protection of this utility model.

Claims

1. A fully insulated inlet / outlet bushing, comprising an inlet / outlet bushing, a conductor bushing fixedly installed with the inlet / outlet bushing, and a conductor inserted into and fixedly installed with the conductor bushing, characterized in that, The conductor bushing includes a conductor bushing body, a conductor sleeve integrally formed on top of the conductor bushing body to facilitate the insertion of the conductor into the conductor bushing body, a flexible insulating plug located at the end of the conductor bushing body facing the inlet / outlet bushing, a threaded copper rod located inside the conductor bushing body and screwed into the inlet / outlet bushing after passing through the conductor and the flexible insulating plug, a nut screwed into the threaded copper rod to limit conductor slippage, a washer fitted onto the threaded copper rod to prevent the conductor from deforming due to contact compression, and a rigid insulating plug embedded in the conductor bushing body and assembled with the threaded copper rod.

2. The fully insulated inlet and outlet bushing according to claim 1, characterized in that, The threaded copper rod has a slender stud end at one end facing the inlet / outlet bushing, and a short, thick stud end at the other end.

3. The fully insulated inlet and outlet bushing according to claim 1, characterized in that, Both flexible and rigid insulating plugs are tapered.

4. The fully insulated inlet and outlet bushing according to claim 1, characterized in that, The inlet and outlet bushing includes an inlet and outlet bushing body, an integrally formed mounting flange, round holes at the four corners of the mounting flange, threaded post integrally formed with the mounting flange and communicating with the inlet and outlet bushing body, and an outer umbrella skirt that abuts against the mounting flange at one end and covers the threaded post.

5. The fully insulated inlet and outlet bushing according to claim 4, characterized in that, The outer umbrella skirt has a corrugated section at the end near the mounting flange.

6. The fully insulated inlet and outlet bushing according to claim 1, characterized in that, The conductor includes a conductor body, a lower connector located at the lower end of the conductor body, and an upper connector located at the upper end of the conductor body.

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