Double-wire copper-aluminum moment flat plate wire clamp
By forming a protective coating at the transition interface between the aluminum plate and the copper surface and designing a movable cover plate, the problems of electrochemical corrosion and contact resistance in copper-aluminum contact are solved, achieving higher connection reliability and mechanical strength.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-30
- Publication Date
- 2026-04-03
AI Technical Summary
The difference in electrode potential between copper and aluminum can easily lead to electrochemical corrosion in humid environments, resulting in problems such as insufficient contact area, increased contact resistance, increased power loss, and reduced mechanical strength.
A uniform and dense protective coating is formed at the transition interface between the aluminum plate and the copper surface using cold spray technology, and the contact area and stability are increased through the design of double guide grooves and movable cover plates.
It effectively inhibits electrochemical corrosion, reduces contact resistance, reduces power loss and heat generation, and improves mechanical strength and stability.
Smart Images
Figure CN224082718U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of wire clamp technology, specifically relating to a double-conductor copper-aluminum torque flat wire clamp. Background Technology
[0002] A double-conductor clamp is a device used to connect two conductors, typically used to connect busbar downleads to the outgoing terminals of electrical equipment. This clamp design allows two conductors to be connected to a single device simultaneously, and is commonly found at the outgoing terminals of transformers, circuit breakers, instrument transformers, disconnect switches, wall bushings, and other electrical equipment. Common conductor types include copper and aluminum, while the outgoing conductors are mostly aluminum stranded wire or steel-cored aluminum stranded wire.
[0003] Because copper and aluminum have different electrode potentials, they are prone to forming galvanic cells in humid environments, leading to electrochemical corrosion, which reduces the connection reliability and service life of the clamp. The physical properties of copper and aluminum are quite different, and traditional connection methods often result in insufficient contact area, increased contact resistance, increased power loss and heat generation. During long-term operation, they are affected by the external environment (such as temperature changes, vibration, etc.), and the connection parts of traditional clamps are prone to loosening, affecting mechanical strength and conductivity. Therefore, we propose a double-conductor copper-aluminum torque flat clamp. Utility Model Content
[0004] The purpose of this utility model is to provide a double-conductor copper-aluminum torque flat plate clamp to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a double-wire copper-aluminum torque flat clamp, comprising a base, the surface of which is provided with a wire groove and a recess, the inner side of which is provided with a connecting hole, the inner side of which is provided with a screw, a cover plate above which is provided, the surface of which is provided with a hole, the surface of which is provided with a spring, a pressure strip above which is provided, and a torque nut and a spring washer on the surface of which.
[0006] Preferably, an aluminum plate is fixedly connected to one end of the base, and the bottom of the aluminum plate is cold-sprayed with copper.
[0007] Preferably, the base has symmetrical wire grooves on both sides of its surface, a groove between the two sets of wire grooves, and a connecting hole through the bottom surface of the inner side of the groove, and a screw is fixedly inserted into the inner side of the connecting hole.
[0008] Preferably, the surface of the cover plate has a through hole, and the screw slides through the inside of the hole.
[0009] Preferably, a spring is sleeved and connected to the surface of the screw, the bottom end of the spring is fixedly connected to the inner surface of the groove, the top end of the spring is fixedly connected to the bottom of the cover plate, the screw slides through the surface of the pressure strip, a torque nut is rotatably connected to the surface of the screw, and the spring washer is slidably sleeved on the surface of the screw.
[0010] Preferably, a limiting block is fixedly installed at the bottom of the base, and the limiting block is connected to the bottom of the connecting hole.
[0011] Compared with the prior art, the beneficial effects of this utility model are:
[0012] 1. By using cold spray technology, a uniform and dense protective coating is formed at the transition interface between the aluminum plate and the copper surface, which effectively isolates the direct contact between the aluminum plate and the copper surface, thereby significantly inhibiting the occurrence of electrochemical corrosion. In addition, the cold spray coating can fill the tiny gaps between copper and aluminum, increase the actual contact area, greatly reduce contact resistance, and reduce power loss and heat generation.
[0013] 2. The double wire groove and movable cover plate can quickly press and fix the wires in the base, which improves the overall stability of the device, can withstand more severe external interference, and reduces the probability of failure. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0015] Figure 2 This is a side view of the present invention.
[0016] Figure 3 This is a schematic diagram of the bottom structure of this utility model.
[0017] In the diagram: 1. Base; 2. Wire groove; 3. Groove; 4. Connecting hole; 5. Screw; 6. Cover plate; 7. Hole; 8. Spring; 9. Pressure strip; 10. Torque nut; 11. Aluminum plate; 12. Copper surface; 13. Limiting block; 14. Spring pad. Detailed Implementation
[0018] 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.
[0019] Please see Figure 1-3This utility model provides a technical solution: a double-wire copper-aluminum torque flat clamp, including a base 1, the surface of the base 1 is provided with a wire groove 2 and a groove 3, the inner side of the groove 3 is provided with a connecting hole 4, the inner side of the connecting hole 4 is provided with a screw 5, the top of the base 1 is provided with a cover plate 6, the surface of the cover plate 6 is provided with a hole 7, the surface of the screw 5 is provided with a spring 8, the top of the cover plate 6 is provided with a pressure strip 9, and the surface of the screw 5 is provided with a torque nut 10 and a spring washer 14.
[0020] Specifically, an aluminum plate 11 is fixedly connected to one end of the base 1. The bottom of the aluminum plate 11 is cold-sprayed with a copper surface 12. Wire grooves 2 are symmetrically opened on both sides of the surface of the base 1. A groove 3 is provided between the two sets of wire grooves 2. A connecting hole 4 is opened through the bottom surface of the inner side of the groove 3. A screw 5 is fixedly inserted into the inner side of the connecting hole 4. A hole 7 is opened through the surface of the cover plate 6. The screw 5 slides through the inner side of the hole 7. A spring 8 is sleeved on the surface of the screw 5. The bottom end of the spring 8 is fixedly connected to the inner surface of the groove 3. The top end of the spring 8 is fixedly connected to the bottom of the cover plate 6. The screw 5 slides through the surface of the pressure strip 9. A torque nut 10 is connected to the threaded surface of the screw 5. A spring washer 14 is slidably sleeved on the surface of the screw 5. A limit block 13 is fixedly installed at the bottom of the base 1. The limit block 13 is correspondingly connected to the bottom of the connecting hole 4.
[0021] In this embodiment, the two wires are respectively threaded through the guide grooves 2 on the surface of the base 1 by the double wire grooves 2. The cover plate 6 can be moved down on the surface of the screw 5 by rotating the torque nut 10, thereby pressing down and fixing the wire body below. When clamping a single wire, a columnar copper rod can be inserted into the other guide groove 2 to achieve a balance effect on both sides. The downward movement of the cover plate 6 can achieve the pressing and fixing effect of the single wire. With the spring 8, when the torque nut 10 is loosened upward, the spring 8 can automatically push the cover plate 6 upward, which is convenient for the operator to use. A uniform and dense protective coating is formed at the transition interface between the aluminum plate 11 and the copper surface 12 by cold spraying technology, which effectively isolates the direct contact between the aluminum plate 11 and the copper surface 12, thereby significantly inhibiting the occurrence of electrochemical corrosion. In addition, the cold spray coating can fill the tiny gaps between copper and aluminum, increase the actual contact area, greatly reduce the contact resistance, and reduce power loss and heat generation.
[0022] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A double-conductor copper-aluminum torque flat clamp, comprising a base (1), characterized in that: The base (1) has a wire groove (2) and a groove (3) on its surface. The groove (3) has a connecting hole (4) on its inner side. The connecting hole (4) has a screw (5) on its inner side. The base (1) has a cover plate (6) on its top. The cover plate (6) has holes (7) on its surface. The screw (5) has a spring (8) on its surface. The cover plate (6) has a pressure strip (9) on its top. The screw (5) has a torque nut (10) and a spring washer (14) on its surface.
2. The double-conductor copper-aluminum torque flat clamp according to claim 1, characterized in that: An aluminum plate (11) is fixedly connected to one end of the base (1), and the bottom of the aluminum plate (11) is cold-sprayed with a copper surface (12).
3. The double-conductor copper-aluminum torque flat clamp according to claim 1, characterized in that: The base (1) has symmetrical wire grooves (2) on both sides of its surface. A groove (3) is provided between the two sets of wire grooves (2). A connecting hole (4) is provided through the bottom surface of the inner side of the groove (3). A screw (5) is fixedly installed inside the connecting hole (4).
4. The double-conductor copper-aluminum torque flat clamp according to claim 1, characterized in that: The surface of the cover plate (6) is provided with a hole (7), and the screw (5) slides through the inside of the hole (7).
5. The double-conductor copper-aluminum torque flat clamp according to claim 1, characterized in that: A spring (8) is sleeved on the surface of the screw (5). The bottom end of the spring (8) is fixedly connected to the inner surface of the groove (3). The top end of the spring (8) is fixedly connected to the bottom of the cover plate (6). The screw (5) slides through the surface of the pressure strip (9). The screw (5) is threadedly connected to a torque nut (10). The spring washer (14) slides on the surface of the screw (5).
6. The double-conductor copper-aluminum torque flat clamp according to claim 1, characterized in that: A limiting block (13) is fixedly installed at the bottom of the base (1), and the limiting block (13) is connected to the bottom of the connecting hole (4).