All-insulated bus rapid butt joint device

Abstract

This utility model belongs to the field of power equipment connection technology, and particularly relates to a quick-connector for fully insulated busbars, including a tubular busbar. A connecting assembly is provided on the outer surface of the tubular busbar. The connecting assembly includes an intermediate joint assembly and a terminal docking assembly. The two sets of components cooperate to achieve the overall docking of the fully insulated tubular busbar. The intermediate joint assembly is installed on the outer surface of the tubular busbar, and the terminal docking assembly is installed on the side of the tubular busbar. This quick-connector for fully insulated busbars features an intermediate joint with an external welding and stainless steel inner sleeve design, which ensures the circular structure of the copper tube while achieving zero potential and low contact resistance at the docking point. The cold-shrink insulation sleeve and prefabricated shielding cylinder work together to optimize the electric field distribution through geometric dispersion and the principle of anti-capacitive screen, reducing the risk of corona discharge and insulation damage. The smooth transition structure and stress cone design of the terminal adapter effectively reduce end temperature rise and electric field concentration, ensuring current carrying capacity and operational safety.

Description

Technical Field

[0001] This utility model relates to the field of power equipment connection technology, specifically a quick-connector for fully insulated busbars. Background Technology

[0002] In power systems, fully insulated tubular busbars, with their outstanding advantages such as high current-carrying capacity, excellent insulation performance, and small footprint, have become core connection components in power engineering projects such as substations, and are widely used in high-voltage power transmission scenarios. Their stable operation is directly related to the power supply reliability of the power system, thus placing extremely high demands on the connection quality of tubular busbars.

[0003] However, existing fully insulated tubular busbar connection technologies still have several key problems, making it difficult to meet actual engineering needs: In the intermediate joint connection stage, traditional welding processes easily damage the circular structure integrity of the tubular busbar, leading to electrical performance degradation. Mechanical connections, on the other hand, are prone to high contact resistance due to insufficient contact surface fit precision, resulting in localized overheating during operation and threatening the insulation layer's safety. In the terminal connection stage, the transition structure design between the circular conductor and the square connection section is unreasonable, easily forming localized electric field concentrations and inducing corona discharge. Furthermore, the lack of anti-pollution design at the terminal significantly increases the risk of insulation breakdown in humid, pollutant-rich outdoor environments. In addition, the overall installation process of existing connection components is complex, requiring high construction precision. On-site commissioning often requires multiple reworks, which not only significantly extends the construction period but also increases labor, machinery, and material costs, severely restricting the construction efficiency and economic benefits of power engineering projects. Utility Model Content

[0004] The purpose of this invention is to provide a quick-connect device for fully insulated busbars to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a fully insulated busbar quick connector, comprising a tubular busbar, wherein a connecting component is provided on the outer surface of the tubular busbar, the connecting component comprising an intermediate joint component and a terminal docking component, the two components cooperating to achieve the overall docking of the fully insulated tubular busbar; the intermediate joint component is installed on the outer surface of the tubular busbar, and the terminal docking component is installed on the side of the tubular busbar; The intermediate joint assembly includes an outer welding sleeve, a snap-fit ​​plate, a cold-shrink insulating sleeve, a prefabricated shielding cylinder, and a stainless steel inner liner. The outer welding sleeve has a semi-cylindrical symmetrical structure and is fastened to the joint of two tubular busbars. A snap-fit ​​plate is provided on the side of the outer welding sleeve, and the snap-fit ​​plate is welded at the joint of the outer welding sleeve. The cold-shrink insulating sleeve is made of imported silicone rubber and is fitted on the outside of the outer welding sleeve. The prefabricated shielding cylinder is made of epoxy resin and is fitted on the outer surface of the cold-shrink insulating sleeve. The stainless steel inner liner is located inside the joint of the tubular busbars.

[0006] Preferably, the cold-shrink insulating sleeve is tightly fitted to the outer welding sleeve after cold shrinkage.

[0007] Preferably, the internal structure of the prefabricated shielding cylinder follows the principle of anti-capacitive screen.

[0008] Preferably, the thickness of the outer welding sleeve is 10mm.

[0009] Preferably, the terminal docking assembly includes a terminal adapter, a climbing skirt, a stress cone, and a square connecting section. The terminal adapter has a tapered transition structure. One end of the terminal adapter is fixedly connected to the circular conductor of the tubular busbar, and the other end of the terminal adapter is connected to the square connecting section. The climbing skirt is made of silicone rubber and is disposed on the outer surface of the terminal adapter and spaced axially along the outer surface of the terminal adapter. The stress cone is sleeved on the end of the terminal adapter.

[0010] Preferably, the stress cone is made of highly elastic insulating rubber material and has an internal conductive layer that is in close contact with the outer surface of the terminal adapter.

[0011] Preferably, the outer surface of the cold-shrink insulating sleeve is provided with anti-slip texture, which is distributed in a ring.

[0012] Preferably, the stress cone is made of highly elastic insulating rubber material and has an internal conductive layer that is in close contact with the outer surface of the terminal adapter.

[0013] Compared with the prior art, the beneficial effects of this utility model are: This fully insulated busbar quick connector features an intermediate joint with an external welding and stainless steel inner bushing design. This design ensures the circular structure of the copper tube while achieving zero potential and low contact resistance at the connection point. The cold-shrink insulation sleeve, in conjunction with the prefabricated shielding cylinder, optimizes the electric field distribution through geometric dispersion and the principle of anti-capacitive screen, reducing the risk of corona discharge and insulation failure. The smooth transition structure and stress cone design of the terminal adapter effectively reduce end temperature rise and electric field concentration, ensuring current carrying capacity and operational safety.

[0014] This fully insulated busbar quick connector features a pre-cooled shrinkable structure at the intermediate joint. The external welding sleeve requires no complex on-site processing, and the cold-shrinkable insulation sleeve can be quickly shrunk and fixed. The terminal components are modularly designed, allowing for rapid assembly of the climbing skirt, stress cone, and protective box, achieving successful testing on the first attempt, avoiding rework, and significantly shortening the construction period. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the cold-shrink insulating sleeve structure of this utility model; Figure 3 This is a schematic diagram of the external welding sleeve connection structure of this utility model.

[0016] In the diagram: 1. Tubular busbar; 2. External welding sleeve; 3. Clip plate; 4. Cold shrink insulation sleeve; 5. Prefabricated shielding cylinder; 6. Stainless steel inner liner; 7. Terminal adapter; 8. Climbing skirt; 9. Stress cone; 10. Square connecting section. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figures 1-3 This utility model provides a technical solution: a fully insulated busbar quick connector, including a tubular busbar 1, with a connecting component on the outer surface of the tubular busbar 1. The connecting component includes an intermediate joint component and a terminal docking component. The two components work together to achieve the overall docking of the fully insulated tubular busbar. The intermediate joint component is installed on the outer surface of the tubular busbar 1, and the terminal docking component is installed on the side of the tubular busbar 1. The intermediate joint assembly includes an outer welding sleeve 2, a snap-fit ​​plate 3, a cold-shrink insulating sleeve 4, a prefabricated shielding cylinder 5, and a stainless steel inner liner 6. The outer welding sleeve 2 has a semi-cylindrical symmetrical structure and is fastened to the joint of two sections of tubular busbar 1. The snap-fit ​​plate 3 is provided on the side of the outer welding sleeve 2 and is welded at the joint of the outer welding sleeve 2. The cold-shrink insulating sleeve 4 is made of imported silicone rubber and is fitted on the outside of the outer welding sleeve 2. The prefabricated shielding cylinder 5 is made of epoxy resin and is fitted on the outer surface of the cold-shrink insulating sleeve 4. The stainless steel inner liner 6 is located inside the joint of the tubular busbar 1.

[0019] After being shrunk by cold, the cold-shrink insulating sleeve 4 fits tightly with the outer welding sleeve 2, and the electric field distribution at the joint is controlled by the geometric dispersion method.

[0020] The internal structure of the prefabricated shielding cylinder 5 follows the principle of anti-capacitive screen, thereby achieving full insulation shielding.

[0021] The outer welding sleeve 2 has a thickness of 10mm, which is used for guidance and support at the joint to ensure zero potential at the joint.

[0022] The terminal docking assembly includes a terminal adapter 7, a climbing skirt 8, a stress cone 9, and a square connecting section 10. The terminal adapter 7 has a tapered transition structure. One end of the terminal adapter 7 is fixedly connected to the circular conductor of the tubular busbar 1, and the other end of the terminal adapter 7 is connected to the square connecting section 10. The climbing skirt 8 is made of silicone rubber and is set on the outer surface of the terminal adapter 7 and distributed axially along the outer surface of the terminal adapter 7. The stress cone 9 is sleeved on the end of the terminal adapter 7.

[0023] The stress cone 9 is made of highly elastic insulating rubber and has an internal conductive layer. The conductive layer is in close contact with the outer surface of the terminal adapter 7, which can effectively change the electric field distribution at the voltage concentration point at the end of the terminal adapter 7, control the electric field strength within a safe range, further reduce the risk of corona discharge, and ensure the insulation performance of the terminal docking components.

[0024] The outer surface of the cold shrink insulation sleeve 4 is provided with anti-slip texture. The anti-slip texture is distributed in a ring, which can increase the friction between the cold shrink insulation sleeve 4 and the prefabricated shielding cylinder 5, prevent the prefabricated shielding cylinder 5 from sliding after being put on. At the same time, the anti-slip texture can also enhance the wear resistance of the cold shrink insulation sleeve 4 and extend the service life of the cold shrink insulation sleeve 4.

[0025] The stress cone 9 is made of highly elastic insulating rubber and has an internal conductive layer. The conductive layer is in close contact with the outer surface of the terminal adapter 7, which can effectively change the electric field distribution at the voltage concentration point at the end of the terminal adapter 7, control the electric field strength within a safe range, further reduce the risk of corona discharge, and ensure the insulation performance of the terminal docking components.

[0026] Working principle: Based on the tubular busbar 1, the entire fully insulated tubular busbar is connected through the coordinated operation of the intermediate joint assembly and the terminal docking assembly. When the intermediate joint assembly is working, the stainless steel inner sleeve 6 located inside the docking end of the tubular busbar 1 provides guidance and support. Then, the semi-cylindrical symmetrical outer welding sleeve 2 is fastened to the docking point of the two sections of tubular busbar 1, and reinforced by welding with the snap-fit ​​plate 3 on its side. The 10mm thick outer welding sleeve 2 can ensure zero potential at the joint. Subsequently, the imported silicone rubber cold-shrink insulating sleeve 4, which is fitted on the outside of the outer welding sleeve 2, is tightly fitted after cold shrinkage. The electric field distribution at the docking point is controlled by the geometric dispersion method. The annular anti-slip texture on its outer surface can also increase the friction with the prefabricated epoxy resin shielding cylinder 5 on the outside, preventing the prefabricated shielding cylinder 5 from sliding. At the same time, the prefabricated shielding cylinder 5 achieves full insulation shielding at the docking point based on the principle of anti-capacitive screen. When the terminal docking assembly is working, one end of the tapered transition structure terminal adapter 7 is fixedly connected to the circular conductor of the tubular busbar 1, and the other end is connected to the square connecting section 10 to achieve a "circle-square" transition; the silicone rubber climbing umbrella skirt 8 with axial spacing on the outer surface improves the anti-fouling performance; the high elastic insulating rubber stress cone 9 sleeved on the end of the terminal adapter 7 is in close contact with the outer surface of the terminal adapter 7 through the internal conductive layer, changing the electric field distribution at the voltage concentration point at the end, controlling the electric field strength within a safe range, reducing the risk of corona discharge, and ensuring the overall insulation performance and current transmission stability.

[0027] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A fully insulated busbar quick-connector, comprising a tubular busbar (1), characterized in that: The outer surface of the tubular busbar (1) is provided with a connecting component, which includes an intermediate joint component and a terminal docking component. The two components work together to achieve the overall docking of the fully insulated tubular busbar. The intermediate joint component is installed on the outer surface of the tubular busbar (1), and the terminal docking component is installed on the side of the tubular busbar (1). The intermediate joint assembly includes an outer welding sleeve (2), a snap-fit ​​plate (3), a cold shrink insulation sleeve (4), a prefabricated shielding cylinder (5), and a stainless steel inner liner (6). The outer welding sleeve (2) has a semi-cylindrical symmetrical structure and is fastened to the joint of two sections of tubular busbar (1). The snap-fit ​​plate (3) is provided on the side of the outer welding sleeve (2) and is welded at the joint of the outer welding sleeve (2). The cold shrink insulation sleeve (4) is made of imported silicone rubber and is fitted on the outside of the outer welding sleeve (2). The prefabricated shielding cylinder (5) is made of epoxy resin and is fitted on the outer surface of the cold shrink insulation sleeve (4). The stainless steel inner liner (6) is located inside the joint of the tubular busbar (1).

2. A fully insulated bus quick dock according to claim 1, characterized in that: The cold-shrink insulating sleeve (4) is tightly fitted to the outer welding sleeve (2) after being cold-shrinked.

3. A fully insulated bus rapid docking connector according to claim 1, characterized in that: The internal structure of the prefabricated shielding cylinder (5) follows the principle of anti-capacitive screen.

4. A fully insulated bus quick dock according to claim 2, characterized in that: The thickness of the outer welding sleeve (2) is 10mm.

5. A fully insulated bus quick dock according to claim 1, characterized in that: The terminal docking assembly includes a terminal adapter (7), a climbing skirt (8), a stress cone (9), and a square connecting section (10). The terminal adapter (7) has a conical transition structure. One end of the terminal adapter (7) is fixedly connected to the circular conductor of the tubular busbar (1). The other end of the terminal adapter (7) is connected to the square connecting section (10). The climbing skirt (8) is made of silicone rubber. The climbing skirt (8) is set on the outer surface of the terminal adapter (7) and is axially spaced along the outer surface of the terminal adapter (7). The stress cone (9) is sleeved on the end of the terminal adapter (7).

6. A fully insulated bus quick dock according to claim 5, characterized in that: The stress cone (9) is made of highly elastic insulating rubber and has a conductive layer inside. The conductive layer is in close contact with the outer surface of the terminal adapter (7), which can effectively change the electric field distribution at the voltage concentration point at the end of the terminal adapter (7).

7. A quick-connector for fully insulated busbars according to claim 1, characterized in that: The outer surface of the cold shrink insulating sleeve (4) is provided with anti-slip texture, which is distributed in a ring.

8. A fully insulated bus quick dock according to claim 5, characterized in that: The stress cone (9) is made of highly elastic insulating rubber and has a conductive layer inside. The conductive layer is in close contact with the outer surface of the terminal adapter (7).

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