A connection assembly for an outdoor cable terminal and an aerial line drop wire

Abstract

The utility model provides a kind of for outdoor cable terminal and overhead line current lead wire's connecting assembly, including vacuum cover, the vacuum cover is cylinder, its inside is equipped with copper busbar, and copper busbar both ends are worn out vacuum cover, the vacuum cover both ends are equipped with first connecting plate, it is connected with copper busbar by second connecting plate;The first connecting plate is L type, it includes horizontal part and vertical part, the first connecting plate horizontal part is equipped with first opening, and the middle part of first opening is equipped with second opening, and the first connecting plate vertical part is equipped with a plurality of first jack.The utility model installs copper busbar in vacuum cover to isolate air, reduce the corrosion of air to busbar, simultaneously, it is convenient and simple to assemble, and current lead wire and cable terminal are connected by bolt connection, and the conductivity and wind vibration resistance are good.

Description

Technical Field

[0001] This utility model belongs to the field of power line technology and relates to a connection component for outdoor cable terminals and overhead line lead wires. Background Technology

[0002] The traditional method of connecting outdoor cable terminals and drain lines has the following problems: First, electrochemical corrosion occurs at the connection point between the cable terminal and the drain line, which can easily affect the stability and service life of the connection. Second, the contact resistance at the connection point is relatively high, usually >20μΩ, leading to excessive temperature rise during power operation, with actual measurements reaching up to 90℃. This not only increases energy loss but also poses safety hazards. In addition, under wind vibration conditions, the bolts at the transmission connection point are at risk of loosening, with a torque attenuation rate >30%, reducing connection reliability. Even with copper-aluminum transition plates, there is still the problem of uneven resistance at multiple interface layers, affecting the stability of current transmission. Finally, due to the long length and heavy weight of the drain line, and the insufficient strength of the cable copper joint, the drain line can cause the copper joint to bend and deform, resulting in insufficient contact area at the connection point, further affecting the connection effect. Utility Model Content

[0003] The purpose of this utility model is to address the problems existing in the prior art by providing a connection component for outdoor cable terminals and overhead line drain lines. This component solves the problems of electrochemical corrosion, excessive temperature rise during operation due to high contact resistance, and the risk of bolt loosening under wind vibration conditions that exist in traditional outdoor cable terminal and drain line connection methods.

[0004] Therefore, the present invention adopts the following technical solution: A connection assembly for connecting an outdoor cable terminal and an overhead line lead wire includes a vacuum cover, which is cylindrical and has a copper busbar inside. Both ends of the copper busbar extend out of the vacuum cover. The vacuum cover has a first connecting plate at both ends, which is connected to the copper busbar through a second connecting plate.

[0005] The first connecting plate is L-shaped and includes a horizontal part and a vertical part. The horizontal part of the first connecting plate has a first opening and a second opening in the middle of the first opening. The vertical part of the first connecting plate has a plurality of first insertion holes.

[0006] The second connecting plate has a second socket at the position corresponding to the first socket; the second connecting plate is square and has the same size and shape as the vertical part of the first connecting plate.

[0007] The first opening is strip-shaped, passing through the horizontal part of the first connecting plate and connecting to the vertical part of the first connecting plate; the second opening is circular.

[0008] The beneficial effects of this utility model are as follows: This invention isolates the copper busbar from the air by installing it in a vacuum chamber, thus reducing air corrosion on the busbar. In addition, this invention is easy and simple to assemble, and the connection between the lead wire and the cable terminal is completed by bolt connection, with good conductivity and wind vibration resistance. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the main structure of this utility model; Figure 2 This is a side view of the structure of this utility model; Figure 3 for Figure 1 Top view of the first connecting plate.

[0010] In the diagram, 1-vacuum enclosure, 2-copper busbar, 3-first connecting plate, 4-second connecting plate, 5-first opening, 6-second opening, 7-first socket, 8-second socket. Detailed Implementation

[0011] The technical solution of this utility model will be described below with reference to the accompanying drawings and implementation methods.

[0012] like Figure 1 and 2 As shown, a connection assembly for connecting outdoor cable terminals and overhead line lead wires includes a vacuum cover 1. The vacuum cover 1 is cylindrical, made of polycarbonate, and has a cross-section with a diameter of 120mm. It has good insulation and mechanical properties and provides a reliable vacuum environment for the copper busbar.

[0013] The vacuum chamber 1 is equipped with a copper busbar 2. The copper busbar 2 is a T3 cold-rolled copper busbar with a rectangular cross section of 80mm×8mm and a conductivity of 98% IACS to ensure good conductivity and optimize current transmission efficiency. It is also tin-plated on its surface with a tin plating layer thickness of 10μm to effectively prevent oxidation and extend service life. Both ends of the copper busbar 2 extend out of the vacuum chamber 1. The vacuum chamber 1 is equipped with a first connecting plate 3 at both ends, which is connected to the copper busbar 2 through a second connecting plate 4.

[0014] The first connecting plate 3 is L-shaped, including a horizontal portion and a vertical portion. The horizontal portion of the first connecting plate 3 has a first opening 5, and the middle of the first opening 5 has a second opening 6; for example Figure 3 As shown, the first opening 5 is strip-shaped, which passes through the horizontal part of the first connecting plate 3 and is connected to the vertical part of the first connecting plate 3; the second opening 6 is circular.

[0015] The second connecting plate 4 is square, and its size and shape are the same as those of the vertical part of the first connecting plate 3. The vertical part of the first connecting plate 3 is provided with a number of first insertion holes 7, and the second connecting plate 4 is provided with second insertion holes 8 at the positions corresponding to the first insertion holes 7. Specifically, the first connecting plate 3 and the second connecting plate 4 are respectively clamped on both sides of the copper busbar 2, and are fixed by a number of fixing bolts sequentially through the first insertion holes 7 and the second insertion holes 8. By setting the first connecting plate 3 and the second connecting plate 4 to connect the copper busbar 2, the problems of high contact resistance, easy heat generation and oxidation, and poor weather resistance of traditional bolt connections can be solved.

[0016] During the use of this utility model: First, a 2m long copper busbar 2 was cut, and crimping grooves and insertion holes were machined at both ends. The surface of the copper busbar 2 was then tin-plated with a thickness of 12μm. After passing a salt spray test for 480 hours, it met the anti-corrosion requirements. Second, a vacuum cover 1 was installed in the middle section of the copper busbar 2, and a vacuum was evacuated from the vacuum cover 1. Next, a first connecting plate 3 and a second connecting plate 4 were installed at the ends of the copper busbar 2, and the three were tightly connected with bolts. Finally, a surge arrester was installed in the second opening 6 on the first connecting plate 3, and the loop resistance was tested according to the IEC60439 standard. The test results showed that the conductivity was excellent.

Claims

1. A connection assembly for connecting outdoor cable terminals and overhead line drain wires, characterized in that, Includes a vacuum hood (1), which is cylindrical and has a copper busbar (2) inside. Both ends of the copper busbar (2) extend out of the vacuum hood (1). The vacuum hood (1) has a first connecting plate (3) at both ends, which is connected to the copper busbar (2) through a second connecting plate (4). The first connecting plate (3) is L-shaped and includes a horizontal part and a vertical part. The horizontal part of the first connecting plate (3) is provided with a first opening (5), the middle part of the first opening (5) is provided with a second opening (6), and the vertical part of the first connecting plate (3) is provided with a plurality of first insertion holes (7).

2. The connection assembly for outdoor cable terminals and overhead line drain wires according to claim 1, characterized in that, The second connecting plate (4) is provided with a second socket (8) at the position corresponding to the first socket (7).

3. The connection assembly for outdoor cable terminals and overhead line drain wires according to claim 1, characterized in that, The first opening (5) is strip-shaped, which penetrates the horizontal part of the first connecting plate (3) and is connected to the vertical part of the first connecting plate (3).

4. A connection assembly for connecting an outdoor cable terminal and an overhead line drain wire according to claim 1, characterized in that, The second opening (6) is circular.

5. A connection assembly for connecting an outdoor cable terminal and an overhead line drain wire according to claim 1, characterized in that, The second connecting plate (4) is square, and its size and shape are the same as those of the vertical part of the first connecting plate (3).

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