CN218525739U

CN218525739U - Aluminum alloy photovoltaic wire harness connection structure

Info

Publication number: CN218525739U
Application number: CN202222833029.0U
Authority: CN
Inventors: 陈善求; 陈攀; 龙俊
Original assignee: Gold Cup Electric Co ltd
Current assignee: Gold Cup Electric Co ltd
Priority date: 2022-10-26
Filing date: 2022-10-26
Publication date: 2023-02-24
Anticipated expiration: 2032-10-26

Abstract

The utility model discloses an aluminum alloy photovoltaic wire harness connecting structure, which comprises a copper terminal and a cable, wherein the cable comprises an aluminum alloy conductor, a cable insulating layer and a cable sheath layer, and the cable insulating layer and the cable sheath layer are sequentially arranged on the outer surface of the aluminum alloy conductor; after the aluminum alloy conductor is connected with the copper terminal in a compression joint mode, a compression joint surface is formed on the outer surface of the compression joint; a first sealing layer is arranged on the outer side of the compression joint surface, and a second sealing layer is coated outside the first sealing layer; the first sealing layer is organic silicon sealing glue, and the second sealing layer is a glue-containing heat-shrinkable tube. The utility model discloses an aluminum alloy photovoltaic pencil connection structure can effectively prevent electrochemical corrosion and chemical corrosion, simple structure, convenient operation.

Description

Aluminum alloy photovoltaic wire harness connection structure

Technical Field

The utility model relates to an aluminum alloy power cable technical field, concretely relates to aluminum alloy photovoltaic pencil connection structure.

Background

With the vigorous development of the photovoltaic industry, cost reduction and efficiency improvement become key research subjects in the industry, and the successful application of the aluminum alloy power cable in the photovoltaic power station not only replaces a copper core cable for large-section confluence and reduces the input cost, but also plays a positive role in promoting the research and development and the use of a small-section aluminum alloy photovoltaic special cable. In recent years, although some head cable enterprises have successfully developed aluminum alloy photovoltaic dedicated cables, the engineering applications are few, and the root cause is that the problem of electrochemical corrosion of conductors and copper terminals of the photovoltaic dedicated cables cannot be solved, so that potential safety hazards exist.

The successful application of the aluminum alloy power cable adopts a copper-aluminum transition terminal to solve the problem, but the same scheme is not suitable for 4mm2 and 6mm2 photovoltaic special cables with small sections. Firstly, because the specification is little, the processing degree of difficulty of copper aluminium transition terminal is very big. Secondly, because terminal and connector are used in coordination, the terminal material changes, and overall design all will change, is unfavorable for practical application, to above-mentioned condition, proposes a connection scheme, solves the potential safety hazard of aluminum alloy photovoltaic special cable.

Chinese utility model patent publication No. CN206225588U discloses an aluminum or aluminum alloy wire harness for preventing galvanic corrosion. The technical problem to be solved is that galvanic corrosion is easy to generate due to large potential difference when an aluminum or aluminum alloy wire is contacted with a copper terminal, and the price of the friction welding copper-aluminum terminal is high. The utility model comprises a copper terminal and a cable, wherein the cable is an aluminum or aluminum alloy cable, the copper terminal comprises a cable crimping end and an electric appliance connecting end, the upper surface of the cable crimping end is plated with an aluminum or aluminum alloy layer, and the upper surfaces of the aluminum or aluminum alloy layer and the electric appliance connecting end are provided with tin protective layers; and a cylindrical hole matched with the outer diameter of the cable is arranged in the middle of the cable crimping end. The utility model prevents galvanic corrosion by plating the protective layer, and the requirement of the method on electroplating is higher.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an aluminum alloy photovoltaic pencil connection structure, this connection structure can effectively prevent electrochemical corrosion and chemical corrosion, simple structure, convenient operation.

In order to realize the purpose, the utility model discloses the technical scheme who adopts is:

an aluminum alloy photovoltaic wire harness connecting structure comprises a copper terminal and a cable, wherein the cable comprises an aluminum alloy conductor, a cable insulating layer and a cable sheath layer, and the cable insulating layer and the cable sheath layer are sequentially arranged on the outer surface of the aluminum alloy conductor; the structure is characterized in that: after the aluminum alloy conductor is connected with the copper terminal in a compression joint mode, a compression joint surface is formed on the outer surface of the compression joint position; a first sealing layer is arranged on the outer side of the crimping surface, and a second sealing layer is coated outside the first sealing layer; the first sealing layer is organic silicon sealing glue, and the second sealing layer is a glue-containing heat-shrinkable tube.

Under the prerequisite that does not change interior terminal specification, for realizing that aluminum alloy photovoltaic private cable conductor is connected with the virtuous of copper terminal, the utility model discloses an aluminum alloy photovoltaic pencil connection structure adopts double-deck sealed method, handles copper terminal and aluminum alloy conductor. The first sealing adopts organosilicon sealant which is a commercial product, is a high-quality high-temperature-resistant adhesive and can resist the high temperature of 120 ℃. The adhesive can be attached to the gap of the crimping surface, a layer of compact protective film is formed on the exposed conductor and the terminal, and the effect of isolating air and water vapor can be achieved. Meanwhile, the adhesive has better high-temperature resistance, and the high temperature generated during the operation of the cable cannot influence the high-temperature. The second sealing adopts a glue-containing heat-shrinkable tube which is a commercial product and can resist the high temperature of 120 ℃. The outer layer (outer wall) of the glue-containing heat-shrinkable tube is made of irradiation cross-linked polyethylene material, and the inner layer (inner wall) is made of hot melt glue. The glue-containing heat shrinkable tube can retract after being baked, so that the glue-containing heat shrinkable tube is tightly wrapped on the first sealing layer. The glue-containing heat-shrinkable tube is heated and shrunk to discharge air between the first sealing layer and the second sealing layer, so that the function of isolating air and water vapor is further enhanced. Because the corruption of metal divide into electrochemical corrosion and chemical corrosion, its induction factor all leaves oxygen and steam, and the electrochemical corrosion of copper aluminium is the same, and based on this principle, the utility model discloses an aluminum alloy photovoltaic pencil connection structure has completely cut off reaction condition, can effectively prevent electrochemical corrosion and chemical corrosion, simple structure, convenient operation. Meanwhile, the first sealing layer and the second sealing layer both enhance the connection strength of the copper terminal, and are more difficult to fall off compared with the connection of a copper conductor and the copper terminal.

Specifically, along the length direction of the cable, the first sealing layer extends to the outer surface of the aluminum alloy conductor, and the second sealing layer extends to the outer surfaces of the cable insulation layer and the cable sheath layer. Because before the crimping, can peel off the insulating layer and the restrictive coating of cable, expose the aluminum alloy conductor, and after the crimping, also can have naked aluminum alloy conductor outside the crimping face, extend first sealing layer to aluminum alloy conductor surface, extend second sealing layer to cable insulation layer and cable restrictive coating surface, can improve anti-corrosion effect.

Specifically, the cross section of the pressure welding surface is M-shaped.

Specifically, still be equipped with the connector on the copper terminal, the crimping face sets up in the cavity of connector. The connector is arranged outside the copper terminal in a matched mode, the connector can resist external mechanical impact and the influence of external environmental factors (such as light and water), the aluminum alloy photovoltaic wire harness connecting structure is fixed in a connector cavity, and the connecting position cannot be separated due to looseness caused by the action of external force. Meanwhile, the connector can play a waterproof role, the protection level can reach IP67, and the connector can be directly connected in a plugging mode and is convenient for field construction.

Preferably, the connector is an MC4 photovoltaic connector.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses an aluminum alloy photovoltaic pencil connection structure can effectively prevent electrochemical corrosion and chemical corrosion, simple structure, convenient operation.

Drawings

Fig. 1 is a schematic view of an aluminum alloy photovoltaic wiring harness connection structure of the present invention;

FIG. 2 isbase:Sub>A schematic cross-sectional view taken along line A-A of FIG. 1;

fig. 3 is a schematic structural diagram of the peripheral connector of the aluminum alloy photovoltaic wire harness connection structure in fig. 1.

In the figure

1-copper terminal, 2-cable, 21-aluminum alloy conductor, 22-cable insulation layer, 23-cable sheath layer, 3-crimping surface, 4-first sealing layer, 5-second sealing layer and 6-connector.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments. It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. For convenience of description, the words "upper", "lower", "left" and "right" in the following description are used only to indicate the correspondence between the upper, lower, left and right directions of the drawings themselves, and do not limit the structure.

As shown in fig. 1, an aluminum alloy photovoltaic wire harness connection structure includes a copper terminal 1 and a cable 2. The cable 2 is an aluminum alloy cable, the cable 2 comprises an aluminum alloy conductor 21, and a cable insulation layer 22 and a cable sheath layer 23 are sequentially arranged on the outer surface of the aluminum alloy conductor 21. After the aluminum alloy conductor 21 is connected with the copper terminal 1 by crimping, a crimping surface 3 is formed on the outer surface of the crimping position. The outer side of the crimping surface 3 is provided with a first sealing layer 4, and the first sealing layer 4 is coated with a second sealing layer 5. The first sealing layer 4 is an organic silicon sealing glue, and the second sealing layer 5 is a glue-containing heat-shrinkable tube. Before crimping, the cable insulation layer 22 and the cable sheath layer 23 of the cable 2 are peeled off to expose the aluminum alloy conductor 21, after crimping, the exposed aluminum alloy conductor 21 is also arranged outside the crimping surface 3, the first sealing layer 4 is extended to the outer surface of the aluminum alloy conductor 21, and the second sealing layer 5 is extended to the outer surfaces of the cable insulation layer 22 and the cable sheath layer 23, so that the anti-corrosion effect can be improved.

As shown in fig. 2, the crimp surface 3 has an M-shaped cross-section. As shown in fig. 3, a connector 6 is further disposed on the copper terminal 1, the crimping surface 3 is disposed in a cavity of the connector 6, and the connector 6 is an MC4 photovoltaic connector.

The utility model discloses an aluminum alloy photovoltaic pencil connection structure concrete operation step as follows:

1. firstly, the cable 2 is processed, the aluminum alloy photovoltaic cable insulation layer 22 and the cable sheath layer 23 are stripped by a wire stripping device, the aluminum alloy conductor 21 with the length of 10mm is exposed, the surface of the aluminum alloy conductor 21 is cleaned, and if oil stains exist, the aluminum alloy conductor should be erased by alcohol.

2. And (4) sealing layer treatment, namely selecting organic silicon sealant and a glue-containing heat-shrinkable tube, and cutting the glue-containing heat-shrinkable tube with the length of 15mm for later use.

3. And (3) connecting the copper terminal 1 and the cable 2, and crimping the copper terminal 1 and the cable 2 by adopting a traditional crimping mode. And a special copper-aluminum transition terminal is not required to be customized, and the copper-aluminum transition terminal is beneficial to use in an actual scene.

4. The first sealing treatment is to dry the crimping surface 3, coat the organosilicon sealant on the crimping surface 3 and the exposed aluminum alloy conductor 21 at the joint of the copper terminal 1 and the cable 2, and coat the organosilicon sealant towards the end of the aluminum alloy conductor 21 inside the copper terminal 1, so as to achieve the sealing effect.

5. And (3) performing secondary sealing treatment on the joint, drying the organic silicon sealant at the joint, performing secondary sealing, sleeving the glue-containing heat-shrinkable tube treated in the step (2), and baking by adopting hot air, wherein the glue-containing heat-shrinkable tube is used for covering the whole joint.

6. And (3) installing a connector 6, and installing an MC4 photovoltaic connector on the sealed cable 2 and the sealed copper terminal 1.

The utility model discloses an aluminum alloy photovoltaic pencil connection structure can effectively prevent electrochemical corrosion and chemical corrosion, simple structure, convenient operation.

The above-mentioned embodiments are to be construed as illustrative and not limitative of the remainder of the disclosure, and it is to be understood that various equivalent modifications can be made without departing from the spirit and scope of the disclosure as set forth in the appended claims.

Claims

1. The aluminum alloy photovoltaic wiring harness connecting structure comprises a copper terminal (1) and a cable (2), wherein the cable (2) comprises an aluminum alloy conductor (21), a cable insulating layer (22) and a cable sheath layer (23), and the cable insulating layer (22) and the cable sheath layer (23) are sequentially arranged on the outer surface of the aluminum alloy conductor (21); the method is characterized in that: after the aluminum alloy conductor (21) is connected with the copper terminal (1) in a compression joint mode, a compression joint surface (3) is formed on the outer surface of the compression joint position; a first sealing layer (4) is arranged on the outer side of the pressure welding surface (3), and a second sealing layer (5) is coated outside the first sealing layer (4); the first sealing layer (4) is an organic silicon sealing glue, and the second sealing layer (5) is a glue-containing heat-shrinkable tube.

2. The aluminum alloy photovoltaic wire harness connection structure according to claim 1, wherein: along the length direction of the cable (2), the first sealing layer (4) extends to the outer surface of the aluminum alloy conductor (21), and the second sealing layer (5) extends to the outer surfaces of the cable insulating layer (22) and the cable sheath layer (23).

3. The aluminum alloy photovoltaic wire harness connection structure according to claim 1, wherein: the cross section of the crimping surface (3) is M-shaped.

4. The aluminum alloy photovoltaic wire harness connection structure according to claim 1, wherein: still be equipped with connector (6) on copper terminal (1), crimping face (3) set up in the cavity of connector (6).

5. The aluminum alloy photovoltaic wire harness connection structure of claim 4, wherein: the connector (6) is an MC4 photovoltaic connector.