Power line with current leakage detection function

Abstract

The utility model belongs to the technical field of wires, and particularly relates to a power line with a current leakage detection function, which comprises a plurality of current-carrying wires wrapped in an outer insulating layer. Each current-carrying wire comprises a current-carrying conductor wrapped by a first insulating layer, the first insulating layers of the two current-carrying wires are wrapped by a shielding layer, and a metal conductor is arranged between the first insulating layer of the current-carrying wire with the shielding layer and the shielding layer; the shielding layer comprises a conductive surface in contact with the metal conductor, and a second insulating layer is arranged outside the shielding layer of the at least one current-carrying wire with the shielding layer, so that the shielding layers among the current-carrying wires are mutually independent, and the leakage current of the current-carrying wires is monitored through the shielding layers.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric wires, and in particular relates to a power line with a current leakage detection function. Background Art

[0002] With the rapid growth in the use of various electrical appliances in our daily lives, demands for safety, quality, lifespan, and cost reduction in the electrical wiring used in these appliances are also increasing. To meet the new demands of diverse electrical products, the requirements for power cords are also becoming increasingly stringent. Traditional two-core or multi-core electrical cables consist of multiple current-carrying conductors, each individually wrapped in insulation. For power cords equipped with LCDIs (Leakage Current Inhibitors), a shielding layer is typically added to the current-carrying conductors to monitor for leakage current hazards during use. Utility Model Content

[0003] 1. Technical Problems to be Solved

[0004] The present invention aims to solve the above-mentioned defects in the prior art and proposes a power cord with a current leakage detection function to solve the problem of how to effectively monitor whether there is a leakage current hazard during the use of the power cord.

[0005] 2. Technical Solution

[0006] In order to solve the above technical problems, the utility model provides a power cord with a current leakage detection function, comprising a plurality of current-carrying wires wrapped in an outer insulating layer;

[0007] Each current-carrying line includes a current-carrying conductor covered by a first insulating layer, wherein the first insulating layer of the two current-carrying lines is covered with a shielding layer, and a metal conductor is provided between the first insulating layer and the shielding layer of the current-carrying line with the shielding layer;

[0008] The shielding layer comprises a conductive surface in contact with the metal conductor, and a second insulating layer is provided outside the shielding layer of at least one current-carrying wire having the shielding layer.

[0009] The shielding layer also includes an insulating surface that does not contact the metal conductor.

[0010] The shielding layer is formed by attaching metal foil or coating metal powder on one complete surface of an insulating substrate to form a conductive surface. The insulating substrate is an insulating film or insulating paper.

[0011] A second insulating layer is provided outside the shielding layers of the two current-carrying wires having the shielding layers.

[0012] The metal conductor is made of braided metal wires, or several metal wires twisted together, or a single metal wire.

[0013] 3. Beneficial Effects

[0014] Compared with the prior art, the power cord with the current leakage detection function of the utility model makes the shielding layers between the current-carrying wires independent of each other, and the leakage current of the current-carrying wires is monitored through the shielding layers. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the metal conductor adopting a mesh structure in Example 1 of the present utility model.

[0016] Figure 2 for Figure 1 Cross-sectional view of .

[0017] Figure 3 This is a schematic diagram of a metal conductor in a mesh structure according to Example 2 of the present utility model.

[0018] Figure 4 for Figure 3 Cross-sectional view of .

[0019] Figure 5 This is a schematic diagram of a metal conductor in Example 1 of the present utility model using a wire.

[0020] Figure 6 for Figure 5 Cross-sectional view of .

[0021] Figure 7 This is a schematic diagram of a metal conductor in Example 2 of the present utility model using a wire.

[0022] Figure 8 for Figure 7 Cross-sectional view of .

[0023] In the picture:

[0024] 1 is the first insulating layer; 2 is the shielding layer; 3 is the metal conductor; 4 is the second insulating layer; 10 is the outer insulating layer; 100 is the power cord. DETAILED DESCRIPTION

[0025] The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0026] Example 1:

[0027] like Figure 1 、 Figure 2 、 Figure 5 、 Figure 6 As shown, the power line with the current leakage detection function of this embodiment includes a plurality of current-carrying wires wrapped in an outer insulating layer 10;

[0028] Each current-carrying wire includes a current-carrying conductor covered by a first insulating layer 1. The first insulating layer 1 of the two current-carrying wires is covered with a shielding layer 2. A metal conductor 3 is disposed between the first insulating layer 1 and the shielding layer 2 of the current-carrying wires having the shielding layer 2. The shielding layer 2 includes a conductive surface in contact with the metal conductor 3 and an insulating surface not in contact with the metal conductor 3. At least one current-carrying wire having the shielding layer 2 is also provided with a second insulating layer 4 on the outside of the shielding layer 2.

[0029] The current-carrying wires in the power cord 100 include a live wire A, a neutral wire B, and a ground wire C. In this embodiment, a second insulating layer 4 is provided outside the shielding layer 2 of the live wire A, and no second insulating layer 4 is provided outside the shielding layer 2 of the neutral wire B. Of course, a second insulating layer 4 may also be provided outside the shielding layer 2 of the neutral wire B, no second insulating layer 4 may be provided outside the shielding layer 2 of the live wire A, and a first insulating layer 1 may be provided outside the ground wire C. Furthermore, a filling structure may optionally be provided between the current-carrying wires.

[0030] In this embodiment, each insulating layer is generally formed of an insulating plastic material in one piece, the current-carrying conductor is a copper wire; the metal conductor 3 is a mesh structure woven from metal wires (such as Figure 2 、 Figure 4 As shown) or metal wires twisted together or directly a metal wire (as Figure 6 、 Figure 8 As shown); the shielding layer 2 is an insulating substrate on which a complete surface is attached with metal foil or coated with metal powder to form a conductive surface. The insulating substrate is an insulating film or insulating paper, which has certain tear resistance and ductility. In this embodiment, a second insulating layer 4 is provided outside the shielding layer 2 of the live wire A or the neutral wire B, which can effectively ensure the insulation state between the live wire A or the neutral wire B, so that the shielding layers between the current-carrying wires are independent of each other, and the leakage current of the current-carrying wires is monitored through the shielding layer.

[0031] Example 2:

[0032] Compared with Example 1, Figure 3 、 Figure 4 、 Figure 7 、 Figure 8 As shown, in this embodiment, the shielding layers 2 of the two current-carrying wires having the shielding layer 2 are both provided with a second insulating layer 4, which can further improve the monitoring effect of the power line on the leakage current of the current-carrying wire on the basis of Example 1, and effectively improve the accuracy of the current-carrying wire leakage current detection.

[0033] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A power cord with a current leakage detection function, the power cord with a current leakage detection function comprising a plurality of current-carrying wires enclosed in an outer insulating layer (10); Each current-carrying line comprises a current-carrying conductor covered by a first insulating layer (1), wherein the first insulating layer (1) of the two current-carrying lines is covered with a shielding layer (2) on the outside, and a metal conductor (3) is provided between the first insulating layer (1) of the current-carrying line having the shielding layer (2) and the shielding layer (2); It is characterized by: The shielding layer (2) includes a conductive surface in contact with the metal conductor (3), and at least one current-carrying wire having the shielding layer (2) is provided with a second insulating layer (4) outside the shielding layer (2); the shielding layer (2) also includes an insulating surface not in contact with the metal conductor (3); The shielding layer (2) is formed by attaching metal foil or coating metal powder on one complete surface of an insulating substrate to form the conductive surface, and the insulating substrate is an insulating film or insulating paper.

2. The power line with current leakage detection function according to claim 1, characterized in that: The shielding layers (2) of the two current-carrying wires having the shielding layers (2) are both provided with a second insulating layer (4) outside.

3. The power line with current leakage detection function according to claim 1, characterized in that: The metal conductor (3) is formed by braiding metal wires or twisting metal wires or is directly a metal wire.

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