CN205303708U - Aluminum alloy is aluminum alloy copper connecting terminal for cable - Google Patents

Abstract

The utility model discloses an aluminum alloy copper connecting terminal for an aluminum alloy cable, comprising: a copper connecting plate, a connecting pipe, and a connecting sleeve, wherein the copper connecting plate, the connecting pipe, and the connecting sleeve are sequentially connected, and the connecting sleeve The inner diameter is larger than the inner diameter of the connecting pipe, and the inner wall of the connecting pipe is provided with internal threads. The utility model provides an aluminum alloy copper connection terminal for aluminum alloy cables, which solves the problem that the electric compound grease in the connection terminal is easily lost; effectively increases the crimping area and reduces the contact resistance; solves the problem that water and oxygen in the air enter the connection The problem of corrosion and oxidation connection parts in the terminal; by using the aluminum alloy material with the same performance as the conductor of the aluminum alloy cable, the problem of poor creep performance of the copper-aluminum terminal is solved.

Description

Aluminum alloy copper connection terminal for aluminum alloy cable

technical field

The utility model relates to an aluminum alloy copper connection terminal for aluminum alloy cables, which belongs to the technical field of connection of aluminum alloy cables in medium and low voltage power systems.

Background technique

In 2006 and 2007, two American companies respectively brought aluminum alloy cable technology and products to China, which promoted the development of aluminum alloy cables in China. However, due to different installation, connection methods, and manufacturing standards, foreign connection terminals cannot be used in China. At present, copper-aluminum connection terminals originally used to connect aluminum cables are widely used in China. This connection terminal has the following disadvantages:

(1) After the existing connecting terminal is used for a period of time, the electric composite grease coated in the tube is easy to lose, resulting in oxidation of the connecting part, increased contact resistance, and overheating of the connection affects safe operation;

(2) After the existing connecting terminal is crimped, there is a section of aluminum alloy conductor exposed between the end face of the terminal and the cable insulation and directly in contact with the air. Water and oxygen in the air can easily enter the connecting terminal from this part, corroding and oxidizing the connecting part , reducing connection reliability;

(3) The problem of poor compressive creep resistance of aluminum in copper-aluminum connection terminals still exists, and the advantages of aluminum alloy cables cannot be reflected by using such terminals to connect aluminum alloy cables.

Utility model content

Purpose: In order to overcome the deficiencies in the prior art, the utility model provides an aluminum alloy copper connection terminal for aluminum alloy cables.

Technical solution: In order to solve the above-mentioned technical problems, the technical solution adopted in the utility model is:

An aluminum alloy copper connecting terminal for an aluminum alloy cable, comprising: a copper connecting plate, a connecting pipe, and a connecting sleeve, the copper connecting plate, connecting pipe, and connecting sleeve are connected in sequence, and the inner diameter of the connecting sleeve is larger than the inner diameter of the connecting pipe , the inner wall of the connecting pipe is provided with an internal thread.

The inner wall of the connecting sleeve is provided with internal threads.

Both the connecting pipe and the connecting sleeve are made of aluminum alloy.

Electric composite grease is arranged in the internal thread gap.

As a preferred solution, the internal thread is set as a 55° pipe thread, and the profile height is ≤1mm.

Beneficial effects: the utility model provides an aluminum alloy copper connection terminal for aluminum alloy cables, which solves the problem that the electric compound grease in the connection terminal is easily lost; effectively increases the crimping area and reduces the contact resistance; solves the problem of water in the air and Oxygen enters into the connection terminal to corrode and oxidize the connection part; by using the aluminum alloy material with the same performance as the aluminum alloy cable conductor, the problem of poor pressure creep performance of the copper-aluminum terminal is solved.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is a schematic cross-sectional view of the utility model.

detailed description

Below in conjunction with accompanying drawing, the utility model is described further.

As shown in Figure 1 and Figure 2, an aluminum alloy copper connection terminal for aluminum alloy cables uses T2 grade electrical copper to make copper connection plate 1, which is connected with aluminum alloy connection pipe 2 by friction welding process; aluminum alloy connection pipe 2 An aluminum alloy connecting sleeve 3 is arranged at the end, and the inner diameters of the aluminum alloy connecting pipe 2 and the aluminum alloy connecting sleeve 3 match the outer diameter of the cable. The inner walls of the aluminum alloy connecting pipe 2 and the aluminum alloy connecting sleeve 3 are provided with internal threads 4 with 55° pipe thread and a profile height of ≤1mm. The internal thread 4 gaps are coated with electric compound grease.

When in use, insert the aluminum alloy cable with the insulation stripped off at the front end into the aluminum alloy connecting tube, and then press the aluminum alloy connecting tube and the aluminum alloy connecting sleeve, because there is a section of aluminum alloy cable in the aluminum alloy connecting sleeve where the insulation is stripped off, Therefore, it can ensure that the cable core is not in contact with the outside world; and the internal threads of the aluminum alloy connecting pipe and the aluminum alloy connecting sleeve are coated with electric compound grease, so it can effectively prevent the loss of electric compound grease and better protect the cable. conduction and connection.

The above is only a preferred embodiment of the utility model, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the utility model, some improvements and modifications can also be made. Retouching should also be regarded as the scope of protection of the present utility model.

Claims (5)

1. an aluminium alloy cable aluminum alloy copper connects terminal, including: copper connecting plate, it is characterized in that: also include: connecting tube, connection sleeve pipe, described copper connecting plate, connecting tube, connection sleeve pipe are sequentially connected with, described adapter sleeve bore is more than connecting tube internal diameter, and described connecting tube inwall is provided with female thread.

2. a kind of aluminium alloy cable aluminum alloy copper according to claim 1 connects terminal, it is characterised in that: described adapter sleeve inside pipe wall is provided with female thread.

3. a kind of aluminium alloy cable aluminum alloy copper according to claim 1 and 2 connects terminal, it is characterised in that: described connecting tube, connection sleeve pipe all adopt aluminum alloy material.

4. a kind of aluminium alloy cable aluminum alloy copper according to claim 2 connects terminal, it is characterised in that: it is provided with electric force compounded grease in described female thread gap.

5. a kind of aluminium alloy cable aluminum alloy copper according to claim 2 connects terminal, it is characterised in that: described female thread is set to 55 pipe screw threads, thread height��1mm.