Novel breakage-proof and moisture-proof copper-aluminum transition connecting lug

Abstract

The utility model discloses a novel breakage-proof and moisture-proof copper-aluminum transition connecting lug which comprises an aluminum base body and a copper-aluminum composite body formed by a copper base body wrapping the outer side of the aluminum base body. The copper-aluminum composite body comprises a plate body part, a pipe body part and a sealing part which are integrated, and the pipe body part is located between the plate body part and the sealing part; a sealing ring is arranged on the inner side wall of the sealing part, a chamfering part is arranged at the tail end of the copper base body at the sealing part, the tail end of the pipe body part is lengthened and connected with the sealing part, and the sealing part is used for sealing a gap between a wire and the wiring terminal to prevent damp oxidation, improving the mechanical strength of the joint of the wire and the pipe body part and avoiding wire breakage. And the chamfer part and the spine part are matched to prevent the rubber ring from falling off and prevent moisture from permeating. And the inner side wall of the accommodating hole of the tube body part is provided with a wire twisting pattern matched with the wire, so that the contact between the wire and the aluminum surface of the connecting lug is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of connection terminals, in particular to a novel anti-breakage and moisture-proof copper-aluminum transition lug. Background Art

[0002] Terminal blocks are widely used in power distribution networks, such as for connecting incoming and outgoing wires to electrical equipment like transformers, circuit breakers, and disconnectors. Copper-aluminum terminal blocks are commonly used. Existing copper-aluminum terminal blocks have a flat end and a cylindrical end.

[0003] For example, patent publication number CN219393726U, titled "A Fully Encapsulated Copper-Aluminum Terminal Block," includes an aluminum substrate and a copper substrate encapsulated thereon. By encapsulating the copper substrate on the outside of the aluminum substrate to form a copper-aluminum composite, the problem of electrochemical corrosion occurring on the unencapsulated sides of the copper-aluminum composite is resolved, ensuring the performance and service life of the terminal block. The copper-aluminum combined inner and outer encapsulation structure resolves the issue of corrosion and fracture at the welding point of the terminal block.

[0004] However, the gaps between the wires and the terminals are easily affected by moisture and oxidized, which can cause the nodes to overheat or even break during long-term operation, posing a safety hazard. At the same time, when rubber rings are installed on the terminals, they are prone to falling off. Utility Model Content

[0005] The purpose of the utility model is to provide a new type of anti-breakage and moisture-proof copper-aluminum transition lug to solve the problems raised in the above background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A novel anti-breakage and moisture-proof copper-aluminum transition lug comprises an aluminum substrate and a copper substrate coated on the outside of the aluminum substrate, wherein the aluminum substrate and the copper substrate form a copper-aluminum composite.

[0008] The copper-aluminum composite body includes an integrated plate body, a tube body, and a sealing portion, wherein the tube body is located between the plate body and the sealing portion;

[0009] The plate body is provided with a connection hole for connecting a copper busbar, and the aluminum base at the tube body is provided with a receiving hole for connecting an aluminum cable;

[0010] A sealing ring is provided on the inner side wall of the sealing portion, and a chamfered portion is provided on the end of the copper base at the sealing portion.

[0011] Preferably, the accommodating hole is provided with twisted wire patterns adapted to the wire.

[0012] Preferably, the connecting holes include a connecting hole 1 with a circular structure and a connecting hole 2 with an oblong hole structure.

[0013] Preferably, a spike portion is provided on the inner wall of the aluminum substrate at the tube body.

[0014] Preferably, the plate body, the tube body and the sealing portion have smooth arc-shaped transitions at the joints between each other and at the corners.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] The end of the tube body is extended to connect the sealing part, which is not only used to seal the gap between the wire and the terminal to prevent moisture and oxidation, but also to improve the mechanical strength of the connection between the wire and the tube body to avoid wire breakage.

[0017] The chamfered portion at the end of the sealing portion can prevent the rubber ring from falling off. At the same time, the chamfered portion can be embedded in the insulation sheath of the wire to further prevent it from falling off and prevent moisture from penetrating.

[0018] The spikes designed on the inner side of the tube body can not only fix the sealing ring, but also embed the outer sheath of the wire to prevent moisture from penetrating.

[0019] The inner side wall of the receiving hole of the tube body is provided with a twisted wire pattern matching the wire, thereby increasing the contact between the wire and the aluminum surface of the lug. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 This is the front view of the utility model;

[0022] Figure 2 It is a top view of the utility model;

[0023] Figure 3 yes Figure 1 Schematic diagram of the local A enlarged structure.

[0024] The reference numerals in the figures are as follows:

[0025] 1. Plate body; 11. Connection hole 1; 12. Connection hole 2; 2. Tube body; 21. Twisted wire pattern; 22. Spike portion; 3. Sealing portion; 31. Sealing ring; 32. Chamfered portion. DETAILED DESCRIPTION

[0026] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] Example:

[0028] The conductor is formed by twisting multiple small conductors together, and at least one layer of insulating sheath is provided on the outside of the conductor.

[0029] A new type of anti-breakage and moisture-proof copper-aluminum transition lug, such as Figure 1-3 As shown, it includes an aluminum substrate and a copper substrate coated on the outside of the aluminum substrate, and the aluminum substrate and the copper substrate form a copper-aluminum composite;

[0030] The copper-aluminum composite body includes an integrated plate body portion 1 , a tube body portion 2 and a sealing portion 3 , wherein the tube body portion 2 is located between the plate body portion 1 and the sealing portion 3 .

[0031] The plate body 1 is provided with connection holes running through the upper and lower parts, which are used to connect the external copper busbar; the connection holes include a connection hole 11 with a circular structure and a connection hole 2 with an oblong hole structure 12; the double-hole locking is beneficial to increasing the contact surface between the copper busbar and the plate body 1, and the connection hole 2 with an oblong hole structure 12 is beneficial to improving the adaptability of the fixation and has a wider range of applications.

[0032] A blind hole is provided on the left side wall of the aluminum base of the tube body 2 to the right. The blind hole is used to connect with the external aluminum cable.

[0033] The improvement of this solution is that an integrated sealing portion 3 is provided on the left side of the tube body 2. The sealing ring 31 on the inner wall of the aluminum base of the sealing portion 3 is made of rubber material and has a certain elastic deformation ability. The inner diameter of the sealing ring 31 is slightly larger than the inner diameter of the coaxial receiving hole. The left end of the copper base in the sealing portion 3 is provided with an integrated chamfered portion 32.

[0034] The spike portion 22 can be set on the inner wall of the aluminum substrate in the tube body 2, and the spike portion 22 can also be set on the inner wall of the aluminum substrate in the sealing portion 3; the inner wall of the accommodating hole of the aluminum substrate in the tube body 2 is provided with a twisted wire pattern 21, and the spike portion 22 is relatively located on the left side of the twisted wire pattern 21; the adaptation of the twisted wire pattern 21 to the wire increases the contact area between the wire and the aluminum substrate in the tube body 2.

[0035] The joints and corners of the copper-aluminum transition lugs are smoothly curved to avoid the accumulation of dirt along the surface tips and the formation of discharge.

[0036] The sealing portion 3 relatively extends the length of the tube body 2 to enhance the mechanical strength of the connection between the copper-aluminum transition lug and the wire to avoid wire breakage.

[0037] The elastically deformable sealing ring 31 is tightly attached to the outer wall of the wire, thereby preventing moisture from forming a gap between the wire and the copper-aluminum transition lug, thereby preventing moisture from causing oxidation. Furthermore, the friction between the sealing ring 31 and the insulating outer sheath of the wire is relatively large.

[0038] The chamfered portion 32 is not only used to prevent the sealing ring 31 from separating from the sealing portion 3, but the tip of the chamfered portion 32 can also be embedded in the insulating sheath of the wire to prevent the wire from falling out of the accommodating hole of the tube body 2, and the tip of the chamfered portion 32 can also be embedded in the insulating sheath of the wire to prevent moisture from penetrating.

[0039] The chamfered portion 32 and the spike portion 22 are relatively located on both sides of the sealing ring 31 and face in opposite directions to cooperate to fix the sealing ring 31. The tip of the spike portion 22 is also embedded in the insulation sheath of the wire to further prevent moisture from penetrating.

[0040] The tube body 2 and the sealing part 3 of the copper-aluminum transition ear of this solution are relatively thin, and are slightly deformed by being compressed by external components. The deformation of the tube body 2 is conducive to the stranded wire pattern 21 to fit closely to the outer wall of the twisted multiple strands of small wires to increase the contact area and increase its anti-torsion effect.

[0041] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0042] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments do not describe all details in detail, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the contents of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A novel anti-breakage and moisture-proof copper-aluminum transition lug, comprising an aluminum substrate and a copper substrate coated on the outside of the aluminum substrate, wherein the aluminum substrate and the copper substrate form a copper-aluminum composite, characterized in that: The copper-aluminum composite body comprises an integrated plate body portion (1), a tube body portion (2), and a sealing portion (3), wherein the tube body portion (2) is located between the plate body portion (1) and the sealing portion (3); The plate body (1) is provided with a connection hole for connecting a copper busbar, and the aluminum base at the tube body (2) is provided with a receiving hole for connecting an aluminum cable; A sealing ring (31) is provided on the inner side wall of the sealing portion (3), and a chamfered portion (32) is provided at the end of the copper base at the sealing portion (3).

2. The novel anti-breakage and moisture-proof copper-aluminum transition lug according to claim 1 is characterized by: The receiving hole is provided with a twisted wire pattern (21) adapted to the wire.

3. The novel anti-breakage and moisture-proof copper-aluminum transition lug according to claim 1 is characterized by: The connecting holes include a connecting hole 1 (11) with a circular structure and a connecting hole 2 (12) with an oblong hole structure.

4. The novel anti-breakage and moisture-proof copper-aluminum transition lug according to claim 1 is characterized by: A spike portion (22) is provided on the inner wall of the aluminum base at the tube body portion (2).

5. The novel anti-breakage and moisture-proof copper-aluminum transition lug according to claim 1 is characterized by: The plate body (1), the tube body (2) and the sealing portion (3) have arc-shaped smooth transitions at the joints between each other and at the corners.

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