A copper-aluminum composite row transfer fitting for power transmission aluminum cable

Abstract

The utility model relates to a copper -aluminium composite row switching fitting for power transmission aluminium cable, including main clamping plate and vice clamping plate, the main clamping plate includes aluminium connecting part and copper connecting part, aluminium connecting part with vice clamping plate cooperation forms the accommodation space for accommodating aluminium cable, the contact of accommodation space with aluminium cable is equipped with aluminium layer, the outside of aluminium connecting part and vice clamping plate all is covered with copper layer. Through the accommodation space that aluminium connecting part on the main clamping plate cooperated with vice clamping plate formed, can firmly accommodate aluminium cable, so that aluminium cable can more smoothly embed, and not easy to fall off, further improved the stability and reliability of fitting, and do not cause damage to aluminium cable, bring great convenience and save cost greatly for the subsequent reconstruction and maintenance. The setting of aluminium layer guarantees good contact with aluminium cable, reduces the generation of resistance and heat. At the same time, the copper layer of aluminium connecting part and vice clamping plate outside not only improves the conductivity, but also enhances the corrosion resistance and service life of fitting.

Description

Technical Field

[0001] This utility model relates to the field of power transmission equipment technology, specifically to a copper-aluminum composite busbar adapter for power transmission aluminum cables. Background Technology

[0002] The main conductor materials used in my country's power system are copper and aluminum. Aluminum conductors are primarily used in the transmission network, while copper conductors are mainly used in the distribution network. Therefore, there are inevitably many instances of copper-aluminum switching during power transmission.

[0003] In existing technologies, T-type terminals are generally used. Figure 6 As shown), the upper end of the T-type terminal block is provided with an aluminum crimping tube 5. The aluminum crimping tube 5 is welded together with the lower end connection part to form a weld point 6. By crimping the aluminum crimping tube and the aluminum cable together, the connection between the T-type terminal block and the aluminum cable is realized. Since the aluminum crimping tube and the aluminum cable will be deformed after crimping, if you want to replace the parts or move the position later, the aluminum crimping tube and the aluminum cable will be scrapped and new materials need to be replaced, which will cause a lot of waste and inconvenience in operation. Utility Model Content

[0004] This utility model addresses existing technical problems by providing a copper-aluminum composite busbar adapter for power transmission aluminum cables.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A copper-aluminum composite busbar adapter for power transmission aluminum cable includes a main clamp plate and a secondary clamp plate. The main clamp plate includes an aluminum connecting part and a copper connecting part. The aluminum connecting part cooperates with the secondary clamp plate to form a receiving space for accommodating the aluminum cable. An aluminum layer is provided at the contact point between the receiving space and the aluminum cable. The outer sides of the aluminum connecting part and the secondary clamp plate are covered with a copper layer.

[0006] Based on the above technical solution, the present invention can be further improved as follows:

[0007] Preferably, the aluminum connector and / or the sub-clamp plate are provided with wire grooves.

[0008] Preferably, the groove is an arc-shaped groove, the inner diameter of the groove is adapted to the outer diameter of the aluminum cable, and the central angle of the groove is less than 180°.

[0009] Preferably, the aluminum connecting part and the copper connecting part are L-shaped as a whole, and the copper connecting part is provided with a connecting hole for connecting a terminal or copper busbar.

[0010] Both the aluminum connecting part and the sub-clamp plate are provided with multiple fastening holes, which are located on both sides of the accommodating space. The aluminum connecting part and the sub-clamp plate are connected by fasteners passing through the fastening holes.

[0011] Preferably, the aluminum layer and the copper layer are cast together as one piece.

[0012] Preferably, the junction of the aluminum connecting part and the copper connecting part is provided with a first inclined surface, and one end of the sub-clamp is provided with a second inclined surface, the second inclined surface corresponding to the first inclined surface.

[0013] The beneficial effects of this utility model are as follows: the accommodating space formed by the aluminum connecting part on the main clamp plate and the auxiliary clamp plate can stably accommodate the aluminum cable, allowing the aluminum cable to be inserted more smoothly and less likely to fall out, further improving the stability and reliability of the adapter hardware, without damaging the aluminum cable, bringing great convenience to subsequent modification and maintenance and significantly saving material costs. The aluminum layer ensures good contact with the aluminum cable, reducing resistance and heat generation. At the same time, the copper layer on the outside of the aluminum connecting part and the auxiliary clamp plate not only improves conductivity but also enhances the corrosion resistance and service life of the hardware. The overall L-shaped aluminum and copper connecting parts, as well as the connection holes and fastening holes, make it easy to connect to other power transmission equipment, improving the convenience and flexibility of installation. It has the advantages of simple overall structure, easy assembly and disassembly, good conductivity, strong corrosion resistance, and long service life. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the present invention when clamping an aluminum cable;

[0015] Figure 2 This is an exploded view of the present invention;

[0016] Figure 3 This is a three-dimensional schematic diagram of the main clamping plate of this utility model;

[0017] Figure 4 This is a schematic diagram of the secondary clamping plate of this utility model;

[0018] Figure 5 This is a cross-sectional schematic diagram of the secondary clamping plate of this utility model;

[0019] Figure 6 This is a schematic diagram of a T-type terminal block in the prior art.

[0020] The attached diagram is labeled as follows: 1. Main clamping plate; 11. Main copper layer; 12. Main aluminum layer; 2. Secondary clamping plate; 21. Secondary copper layer; 22. Secondary aluminum layer; 3. Aluminum cable; 4. Fastener; 5. Aluminum pressure fitting; 6. Solder joint. Detailed Implementation

[0021] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention 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 invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0022] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. The terms "vertical," "upper," "lower," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model.

[0023] like Figures 1 to 5 As shown, this utility model discloses a copper-aluminum composite busbar adapter for power transmission aluminum cables, including a main clamp plate 1 and a secondary clamp plate 2. The main clamp plate 1 includes an aluminum connecting part and a copper connecting part. The aluminum connecting part and the secondary clamp plate 2 cooperate to form a receiving space for accommodating an aluminum cable 3. The receiving space extends along the length direction of the aluminum cable 3. An aluminum layer is provided at the contact point between the receiving space and the aluminum cable 3. Both the aluminum connecting part and the outer side of the secondary clamp plate 2 are covered with a copper layer. Specifically, the aluminum connecting part includes a main aluminum layer 12 located on the inner side and a main copper layer 11 covering the outer side of the main aluminum layer 12. The secondary clamp plate 2 includes a secondary aluminum layer 22 located on the inner side and a secondary copper layer 21 covering the outer side of the secondary aluminum layer 22. Through the cooperation between the aluminum connecting part and the secondary clamp plate 2, the aluminum cable 3 can be tightly and stably fixed in the receiving space. The aluminum layer enhances the contact effect with the aluminum cable 3, reduces the resistance and heat generated due to poor contact, and thus improves the efficiency of power transmission. Meanwhile, the copper layer on the outside of the aluminum connector and the sub-clamp 2 not only improves the overall conductivity, but also significantly enhances the corrosion resistance of the fittings and extends their service life.

[0024] In this embodiment, both the aluminum connector and the secondary clamping plate 2 are provided with grooves. The two grooves cooperate to form a receiving space for the aluminum cable 3. Specifically, the grooves are arc-shaped grooves, with the inner diameter of the grooves matching the outer diameter of the aluminum cable 3. The central angle of the grooves is less than 180°, meaning the grooves are arc-shaped grooves smaller than a semicircle. The aluminum layer is exposed by milling away the copper layer on the inner side of the aluminum connector and the secondary clamping plate 2, forming the grooves and allowing the aluminum layer to contact the aluminum cable 3. By setting the grooves, the aluminum cable 3 can be more smoothly embedded into the receiving space. At the same time, the arc-shaped grooves can better fit the shape of the aluminum cable 3 without damaging it, further improving the stability and reliability of the aluminum cable 3's fixation. Moreover, under the limitation of the grooves, the aluminum cable 3 can be accurately positioned within the receiving space, avoiding problems such as poor contact or unstable fixation caused by positional deviation. In addition, the central angle of the grooves is less than 180°, allowing the aluminum cable 3 to be gradually squeezed and fixed during the embedding process, further enhancing the firmness of the fixation. When using it, the size of the cable tray can be flexibly selected according to the specifications of aluminum cable 3.

[0025] In other alternative embodiments, the aluminum connector is provided with a groove, and the secondary clamping plate 2 is flat; or the aluminum connector is flat, and the secondary clamping plate 2 is provided with a groove. The groove and the flat surface cooperate to form a space to accommodate the aluminum cable 3, which simplifies the structure of the hardware, reduces manufacturing costs, and still maintains stable fixation of the aluminum cable 3. In specific applications, the position and number of grooves can be selected according to actual needs to achieve the best fixing effect and economic benefits. In addition, the design of the groove can be adjusted according to the outer diameter of the aluminum cable 3 to ensure a tight fit between the groove and the aluminum cable 3, further improving the stability and reliability of the fixation.

[0026] In this embodiment, specifically, the aluminum and copper connecting parts are L-shaped as a whole, and the copper connecting part is provided with connecting holes for connecting terminals or copper busbars. The L-shaped structure design allows the fitting to distribute stress more evenly when under load, improving the overall load-bearing capacity and stability. The connecting holes facilitate the connection of the adapter fitting to the connecting terminals or copper busbars, improving ease of use.

[0027] Furthermore, both the aluminum connecting part and the sub-clamping plate 2 are provided with multiple fastening holes, located on both sides of the accommodating space. The aluminum connecting part and the sub-clamping plate 2 are connected by fasteners 4 passing through the fastening holes. The fasteners 4 are bolts or screws, and a nut is installed at the end of the fastener 4 that passes through the fastening hole. Through the fastening hole, the fastener 4 and the nut, the main clamping plate 1 and the sub-clamping plate 2 can be tightly connected together, ensuring sufficient clamping force and stability when clamping the aluminum cable 3. The connection method is simple and reliable, and easy to operate and maintain. At the same time, the setting of multiple fastening holes also provides more connection points, allowing the hardware to distribute stress more evenly when under force, avoiding damage caused by stress concentration. Furthermore, the cooperation of the fastening holes and the fasteners 4 also allows for easy adjustment of the distance between the main clamping plate 1 and the sub-clamping plate 2 to accommodate aluminum cables 3 of different diameters, improving the versatility and flexibility of the hardware.

[0028] In this embodiment, the aluminum layer and copper layer are cast as a single unit, forming a metallurgical interface. This interface offers advantages such as a large copper-aluminum bonding area and strong bonding force, resulting in relatively low resistance in the adapter. Consequently, the temperature rise during operation is lower, effectively improving the conductivity and thermal stability of the adapter and extending its service life. Furthermore, compared to existing T-type terminals, this adapter eliminates the solder joint 6, avoiding the risk of localized overheating due to high localized resistance caused by welding defects, thus ensuring safe use.

[0029] In this embodiment, specifically, a first inclined surface is provided at the junction of the aluminum connecting part and the copper connecting part, and a second inclined surface is provided at one end of the secondary clamping plate 2, with the second inclined surface corresponding to the first inclined surface. Since the main clamping plate 1 is made of copper-aluminum composite straight-line material processed by mechanical bending, if the junction of the aluminum connecting part and the copper connecting part is directly bent to a 90° right angle, the outer angle at the bend will crack due to excessive deformation. Therefore, this invention uses two 45° bends at the junction of the copper connecting part and the aluminum connecting part to form the first inclined surface, thereby avoiding cracking at the bend and ensuring the service life of the main clamping plate 1. The second inclined surface of the secondary clamping plate 2 corresponds to the first inclined surface, ensuring the consistency and aesthetics of the overall structure.

[0030] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A copper-aluminum composite busbar adapter for power transmission aluminum cables, characterized in that, It includes a main clamping plate (1) and a secondary clamping plate (2). The main clamping plate (1) includes an aluminum connecting part and a copper connecting part. The aluminum connecting part and the secondary clamping plate (2) cooperate to form a receiving space for accommodating an aluminum cable (3). An aluminum layer is provided at the contact point between the receiving space and the aluminum cable (3). The outer sides of the aluminum connecting part and the secondary clamping plate (2) are covered with a copper layer.

2. The copper-aluminum composite busbar adapter for power transmission aluminum cables according to claim 1, characterized in that, The aluminum connector and / or the sub-clamp (2) are provided with wire grooves.

3. The copper-aluminum composite busbar adapter for power transmission aluminum cables according to claim 2, characterized in that, The trough is an arc-shaped trough, the inner diameter of the trough is adapted to the outer diameter of the aluminum cable (3), and the central angle of the trough is less than 180°.

4. The copper-aluminum composite busbar adapter for power transmission aluminum cables according to claim 1, characterized in that, The aluminum connecting part and the copper connecting part are generally L-shaped. The copper connecting part is provided with a connecting hole, which is used to connect a terminal or a copper busbar.

5. The copper-aluminum composite busbar adapter for power transmission aluminum cables according to claim 1, characterized in that, Both the aluminum connecting part and the sub-clamp plate (2) are provided with multiple fastening holes, which are located on both sides of the accommodating space. The aluminum connecting part and the sub-clamp plate (2) are connected by fasteners (4) passing through the fastening holes.

6. The copper-aluminum composite busbar adapter for power transmission aluminum cables according to claim 1, characterized in that, The aluminum layer and the copper layer are cast together as one piece.

7. The copper-aluminum composite busbar adapter for power transmission aluminum cables according to claim 1 or 4, characterized in that, The aluminum connector and the copper connector are provided with a first inclined surface, and one end of the sub-clamp (2) is provided with a second inclined surface, which corresponds to the first inclined surface.

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