CN212392016U - Electric wire - Google Patents

Abstract

The present disclosure provides an electrical wire, comprising: the cable comprises a conductive wire core, a first insulating layer, a conductive layer and a second insulating layer. The first insulating layer is wound on the outer side of the conductive wire core, the conductive layer is wound on the outer side of the first insulating layer, and the second insulating layer is wound on the outer side of the conductive layer. By arranging the conductive layer and the second insulating layer on the outer side of the inner insulating layer, the danger caused by electric leakage when the first insulating layer is damaged can be avoided.

Description

Electric wire

Technical Field

The present disclosure relates to the field of electrical technology, and more particularly, to an electrical wire.

Background

With the exploration of the physical world, humans have stepped into the electrical era. As a medium for power transmission, electric wires become an indispensable component in a consumer environment.

In implementing the disclosed concept, the inventors found that there are at least the following problems in the related art: the existing electric wire generally comprises a conductive wire core and an insulating layer surrounding the conductive wire core. The conductive wire core is used for transmitting electric energy, and the insulating layer is used for playing an electric insulation role. The electric energy transmitted by the conductive wire core can not be leaked, the normal transmission of the electric energy is guaranteed, and the safety of external objects and people is guaranteed. However, if the insulating layer wrapped on the outer side of the conductive wire core is worn, especially when the insulating layer is worn less, the insulating layer is not easy to be perceived, so that potential safety hazards are inevitably brought to external objects and people.

SUMMERY OF THE UTILITY MODEL

In order to avoid potential safety hazards caused by abrasion of the insulating layer, the embodiment of the disclosure provides an abrasion-resistant electric wire which is convenient to detect whether the electric wire is abraded or not.

The present disclosure provides an electric wire including: the conductive wire core and the first insulating layer are wound on the outer side of the conductive wire core; a conductive layer wrapped around the outside of the first insulating layer; and a second insulating layer wrapping the outside of the conductive layer.

According to the embodiment of the disclosure, the number of the conductive wire cores, the number of the first insulating layers and the number of the conductive layers are at least two, the at least two first insulating layers are correspondingly wrapped outside the at least two conductive wire cores one to one respectively, and the at least two conductive layers are correspondingly wrapped outside the at least two first insulating layers one to one respectively.

According to the embodiment of the disclosure, the number of the conductive wire cores and the number of the first insulating layers are at least two; the at least two first insulating layers are correspondingly wrapped outside the at least two conductive wire cores one by one respectively; the conductive layer surrounds the outside of the at least two first insulating layers.

According to an embodiment of the present disclosure, the conductive layer is configured to: forming a first connection point at one end of the electric wire, the first connection point being used for connecting a ground wire of the electric device; and forming a second connection point at the other end of the wire, the second connection point for connecting to a ground point of the utility grid.

According to an embodiment of the present disclosure, the conductive layer is formed by a wire mesh comprising a plurality of wires; wherein the plurality of wires are configured to: the first connection point is formed by connecting one end of the wire, and the second connection point is formed by connecting the other end of the wire.

According to the embodiment of the disclosure, the wire mesh adopts a net structure, the net structure comprises a plurality of grids, and the distance between any two points of any one grid in the plurality of grids in the circumferential direction is smaller than or equal to the wire diameter of the conductive wire core.

According to an embodiment of the present disclosure, the conductive layer includes: a metal plate wrapped outside the first insulating layer; and a plurality of metal wires, with metal sheet fixed connection and along the setting of extending of the girth direction of conductive core, a plurality of metal wires are at the length direction periodic arrangement of conductive core, wherein, lie in the metal wire at electric wire both ends among a plurality of metal wires and configure into: at least two metal wires at one end of the wire are connected to form a first connection point, and at least two metal wires at the other end of the wire are connected to form a second connection point.

According to an embodiment of the present disclosure, the conductive layer is a coil structure formed by winding a metal wire along an outer side of the first insulating layer, wherein the coil structure is configured to: the first end of the coil structure serves as a first connection point and the second end of the coil structure serves as a second connection point.

According to an embodiment of the present disclosure, the above-mentioned electric wire further includes at least one of: the fiber layer is arranged between the first insulating layer and the conducting layer and wraps the first insulating layer; and the fiber layer is arranged between the second insulating layer and the conductive layer and wraps the conductive layer.

According to the embodiment of the present disclosure, the conductive layer adopts at least one of the following materials: copper, aluminum, alloys.

According to the embodiment of the disclosure, the second insulating layer is arranged on the outer side of the first insulating layer, so that potential safety hazards caused by current leakage to the outside of the wire when the first insulating layer is damaged due to aging and the like can be avoided. Moreover, through set up the conducting layer between first insulating layer and second insulating layer, can detect whether wearing and tearing in first insulating layer through measuring the resistance between conductive core and the conducting layer to be convenient for in time change the electric wire of wearing and tearing, avoid the potential safety hazard because of electric wire wearing and tearing bring to a certain extent.

Drawings

The above and other objects, features and advantages of the present disclosure will become more apparent from the following description of embodiments of the present disclosure with reference to the accompanying drawings, in which:

fig. 1 schematically illustrates a cross-sectional schematic view of an electrical wire according to an embodiment of the present disclosure;

FIG. 2 schematically illustrates a cross-sectional view of an electrical wire according to another embodiment of the present disclosure;

FIG. 3 schematically illustrates a cross-sectional view of an electrical wire according to yet another embodiment of the present disclosure;

FIG. 4 schematically illustrates a structural schematic of an electrical wire according to an embodiment of the disclosure;

fig. 5A schematically illustrates a structural schematic of an electrical wire according to another embodiment of the present disclosure;

FIG. 5B schematically illustrates a tiled architecture of the conductive layers of FIG. 5A;

fig. 6 schematically illustrates a structural view of an electric wire according to yet another embodiment of the present disclosure; and

fig. 7 schematically illustrates an application scenario of a wire according to an embodiment of the present disclosure.

Detailed Description

Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. It should be understood that the description is illustrative only and is not intended to limit the scope of the present disclosure. In the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the disclosure. It may be evident, however, that one or more embodiments may be practiced without these specific details. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present disclosure.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. The terms "comprises," "comprising," and the like, as used herein, specify the presence of stated features, steps, operations, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, or components.

All terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art unless otherwise defined. It is noted that the terms used herein should be interpreted as having a meaning that is consistent with the context of this specification and should not be interpreted in an idealized or overly formal sense.

Fig. 1 schematically illustrates a cross-sectional schematic view of a wire according to an embodiment of the disclosure.

As shown in fig. 1, embodiments of the present disclosure provide a wire 100 including a conductive core 110, a first insulating layer 120, a conductive layer 130, and a second insulating layer 140.

The conductive core 110 is located at the innermost layer of the wire 100, and the conductive core 110 is a wire conductor, i.e., a conductive portion, for transmitting power or transmitting information. In use, an electric current is passed through the conductive core 110.

Illustratively, as shown in fig. 1, the conductive wire core may be, for example, a single round wire having a circular cross-section. In one embodiment, the conductive wire core may also be, for example, a round stranded wire, a compact stranded wire, or a hollow round stranded wire. Alternatively, the conductive core may have a special-shaped structure, such as a sector, a tile, a flat, etc. The shape of this conductive core can be set for according to actual need, and this disclosure does not limit this.

For example, the conductive wire core may be a metal conductor, and the metal used may be a single metal material such as gold, silver, copper, iron, or aluminum, a composite metal material such as copper-clad aluminum, copper-clad steel, or steel-clad aluminum, or an alloy material with good conductivity, such as an aluminum alloy or a copper alloy. The material used for the conductive wire core can be set according to actual requirements, and the disclosure does not limit the material.

Illustratively, the conductive wire core may be formed by a single conductor or by twisting a plurality of conductors. In order to improve the reliability and mechanical strength of the conductive core, it is preferable to use a conductive core formed by stranding a plurality of conductors. When the plurality of conductors are twisted to form the conductive wire core, a regular twisting mode or an irregular twisting mode can be adopted, and the twisting mode and twisting parameters (such as twisting pitch, pitch ratio and twisting angle) can be set according to actual requirements.

The first insulating layer 120 is wrapped around the outer side of the conductive core, and the insulating layer may be completely wrapped around the outer side of the conductive core to prevent current leakage through the conductive core and ensure normal transmission of current transmitted by the conductive core.

For example, the first insulating layer 120 may be made of polyvinyl chloride (PVC), irradiation cross-linked polyvinyl chloride (XL-PVC), irradiation cross-linked polyethylene (XL-PE), low smoke zero Halogen (Halogen-free), silicon rubber, teflon (telflon), or the like. The insulating material is preferably an environment-friendly material, and particularly a material without phthalate. It is understood that the insulating material used for the first insulating layer 120 can be set according to actual requirements, and the disclosure is not limited thereto.

Wherein the conductive layer 130 is wrapped around the outside of the first insulating layer 120 such that the first insulating layer 120 is sandwiched between the conductive core 110 and the conductive layer 130. The conductive layer 130 may be formed by using the structure described in the following fig. 3 to fig. 6, and will not be described herein again. The conductive layer is made of a conductive material, and the conductive material can be copper, aluminum or an alloy. In one embodiment, the conductive layer 130 may be made of the same material as the conductive core 110.

The second insulating layer 140 is wrapped around the conductive layer 130, and the second insulating layer 140 may be completely wrapped around the conductive layer 130, so as to prevent the current leaked to the conductive layer 130 from leaking to the outside of the wire when the first insulating layer 120 is worn, and to improve the flame retardant rating of the wire. For safety, the second insulating layer 140 may be made of an insulating material such as plastic or rubber. In one embodiment, the second insulating layer 140 may be made of the same material as the first insulating layer 120.

According to embodiments of the present disclosure, the wire may also be provided with a fiber layer, for example, thereby improving the tensile strength and flexibility of the wire. The fiber layer may be formed by knitting natural fibers such as flax fibers or synthetic fibers such as nylon.

Illustratively, a fiber layer may be disposed between the first insulating layer 120 and the conductive layer 130. At this time, the fiber layer is wound outside the first insulating layer 120, and the conductive layer 130 is wound outside the fiber layer.

Illustratively, a fiber layer may be disposed between the conductive layer 130 and the second insulating layer 140. At this time, the fiber layer is wound outside the conductive layer 130, and the second insulation layer 140 is wound outside the fiber layer.

Illustratively, fiber layers may also be disposed between the conductive layer 130 and the second insulating layer 140 and between the first insulating layer 120 and the conductive layer 130. At this moment, the electric wire is by the conductive wire core, first insulating layer, first fibrous layer, conducting layer, second fibrous layer and the second insulating layer that wraps up in proper order from inside to outside.

Compared to the prior art wire including only the conductive core and the single insulation layer, the wire 100 of the embodiment of the present disclosure may prevent the current from leaking to the outside of the wire due to the second insulation layer 140 disposed at an interval from the first insulation layer 120 even if the first insulation layer 120 is damaged due to aging by heat generated by the conductive core 110 transmitting the current for a long time, since the first insulation layer 120 and the second insulation layer 140 are disposed at an interval. Alternatively, when the second insulating layer 140 is broken due to abrasion or malfunction, current leakage to the outside of the electric wire can be prevented due to the provision of the first insulating layer 120. Therefore, the service life and the use safety of the electric wire can be improved.

According to the embodiment of the present disclosure, normally, since the first insulating layer 120 is sandwiched between the conductive layer 130 and the conductive core 110, the resistance between the conductive core 110 and the conductive layer 130 for transmitting current is large. However, when the first insulating layer 120 is damaged due to aging caused by heat generated by the current transmitted by the conductive core 110 for a long time, the current leaked from the conductive core 110 may charge the conductive layer 130, so that the resistance between the conductive core 110 and the conductive layer 130 may be reduced. Therefore, the resistance between the conductive core 110 and the conductive layer 130 can be measured, and the wire can be detected according to the resistance value to determine whether the first insulating layer 120 of the wire 100 is aged and broken. The smaller the resistance between the conductive core 110 and the conductive layer 130, the more serious the aging damage of the first insulating layer 120. If the resistance between the conductive core 110 and the conductive layer 130 is very small or zero ohm, it indicates that the conductive core 110 and the conductive layer 130 are in a complete conduction state, and the first insulating layer 120 is no longer insulated. Through the mode, the user or the electric power staff can discover the aging of the electric wire in time and replace the new electric wire in time, so that the potential safety hazard brought to the human body or an external object is effectively avoided.

According to embodiments of the present disclosure, wires including different numbers of conductive cores may be employed for different application scenarios. For example, for household electricity, at least two conductive cores are generally included in the electric wire, and the directions of currents transmitted in two of the at least two conductive cores are opposite, so that one of the two conductive cores serves as a live wire and the other one serves as a neutral wire. The structure of the electric wire including at least two conductive cores will be described below with reference to fig. 2 to 3.

Fig. 2 schematically illustrates a cross-sectional schematic view of a wire according to another embodiment of the present disclosure.

In one embodiment, the electrical wire includes at least two conductive cores. Correspondingly, the number of the first insulating layers and the number of the conducting layers are equal to the number of the conducting wire cores, and the number of the second insulating layers is one. The structure of the electric wire is as follows: the at least two first insulating layers are correspondingly wrapped on the outer sides of the at least two conductive wire cores one to one respectively. The at least two conducting layers are correspondingly wrapped outside the at least two first insulating layers one by one respectively. A second insulating layer surrounds the outside of the at least two conductive layers.

Illustratively, as shown in fig. 2, the wire 200 includes two conductive cores 210, and two of the first insulating layer 220 and the conductive layer 230. One of the two first insulating layers 220 is wound around the outside of one conductive wire core 210, and the other of the two first insulating layers 220 is wound around the outside of the other conductive wire core 210. One of the two conductive layers 230 is wrapped around the outside of one first insulating layer, the other of the two conductive layers 230 is wrapped around the outside of the other first insulating layer, and the second insulating layer 240 is wrapped around the outside of the two conductive layers 230. As such, one conductive core 210, one first insulating layer surrounding the one conductive core 210, and the conductive layer surrounding the one first insulating layer may serve as a set of conductive structures. The number of conductive structures included in the wire 200 is equal to the number of conductive cores 210. And a second insulating layer 240 is wrapped between two adjacent sets of conductive structures.

According to the embodiment of the present disclosure, normally, since the first insulating layer 220 is sandwiched between the conductive wire core 210 and the conductive layer 230 in each group of conductive structures, the resistance between the conductive wire core 210 and the conductive layer 230 transmitting current in each group of conductive structures is large. However, when the first insulating layer 220 in a certain group of conductive structures is damaged due to aging caused by heat generated by long-time current transmission of the conductive core 210, the conductive layer 230 is charged by the current leaked from the conductive core 210, so that the resistance between the conductive core 210 and the conductive layer 230 is reduced. Therefore, the resistance between the conductive core 210 and the conductive layer 230 in each group of conductive structures can be measured, and each group of conductive structures can be detected according to the resistance value to determine whether the first insulating layer 220 in each group of conductive structures is aged and damaged. The smaller the resistance between the conductive core 210 and the conductive layer 230, the more serious the first insulating layer 220 is damaged due to aging. If the resistance between the conductive core 210 and the conductive layer 230 is very small or zero ohm, it indicates that the conductive core 210 and the conductive layer 230 are in a complete conduction state, and the first insulating layer 220 is no longer insulated. Through the mode, the user or the electric power staff can discover the aging of the electric wire in time and replace the new electric wire in time, so that the potential safety hazard brought to the human body or an external object is effectively avoided.

Fig. 3 schematically illustrates a cross-sectional view of an electrical wire according to yet another embodiment of the present disclosure.

In one embodiment, the electrical wire includes at least two conductive cores. Correspondingly, the number of the first insulating layers is equal to that of the conductive wire cores, and the number of the conductive layers is one than that of the second insulating layers. The structure of the electric wire is as follows: the at least two first insulating layers are correspondingly wrapped on the outer sides of the at least two conductive wire cores one to one respectively. The conductive layer is wrapped around the outside of at least two first insulating layers, and the second insulating layer is wrapped around the outside of the conductive layer.

Illustratively, as shown in fig. 3, the wire 300 includes two conductive cores 310 and two first insulating layers 320. One of the two first insulating layers 320 is wrapped around one of the conductive wire cores 310, and the other of the two first insulating layers 320 is wrapped around the other conductive wire core 310. The conductive layer 330 is wrapped around the two first insulating layers 320, and the second insulating layer 340 is wrapped around the conductive layer 330. As such, one conductive core 310 and a first insulating layer surrounding the one conductive core 310 may serve as a set of conductive structures. The number of conductive structures included in the wire 300 is equal to the number of conductive cores 310. And the gap between two adjacent sets of conductive structures is also surrounded by the conductive layer 330, so that each of the two first insulating layers 320 is in full contact with the conductive layer 330. According to the embodiment of the present disclosure, in a normal condition, since the first insulating layer 320 is sandwiched between the conductive wire core 310 in each group of conductive structures and the conductive layer 330 outside the conductive structures, a resistance value between the conductive wire core 310 in each group of conductive structures for transmitting current and the conductive layer 330 outside the conductive structures is large. However, when the first insulating layer 320 in a certain group of conductive structures is aged and damaged due to heat generated by the conductive core 310 transmitting current for a long time, the current leaked in the conductive core 310 may cause the conductive layer 330 outside the conductive structure to be charged, so that the resistance between the conductive core 310 and the conductive layer 330 outside the conductive structure is decreased. Therefore, the resistance between the conductive core 310 and the conductive layer 330 outside the conductive structure in each group of conductive structures can be measured, and the conductive structures in each group can be detected according to the resistance value to determine whether the first insulating layer 320 in each group of conductive structures is damaged due to aging. The smaller the resistance between the conductive core 310 and the conductive layer 330 outside the conductive structure, the more serious the first insulating layer 320 is damaged due to aging. If the resistance between the conductive core 310 and the conductive layer 330 outside the conductive structure is very small or zero ohm, it means that the conductive core 310 and the conductive layer 330 outside the conductive structure are in a complete conduction state, and the first insulating layer 320 is no longer insulated. Through the mode, the user or the electric power staff can discover the aging of the electric wire in time and replace the new electric wire in time, so that the potential safety hazard brought to the human body or an external object is effectively avoided.

According to an embodiment of the present disclosure, in a case where an electric device in home electric is provided with a ground wire, a first connection point may be formed on a conductive layer of the electric wire in any one of fig. 1 to 3 at one end of the electric wire in a length direction, and the first connection point may be connected to the ground wire of the electric device. And forming a second connection point of the conductive layer at the other end of the electric wire in the length direction, the second connection point being connected to a ground point of the public power grid. In this way, when the electrical equipment is powered on, the ground line can be used as a safety line since the ground line is connected to the ground point of the public power grid via the electric wire. When the first insulating layer is aged and damaged, the current leaked by the conductive wire core can be guided to the ground through the grounding point of the public power grid, and the potential safety hazard caused by the fact that the second insulating layer is damaged at the same time can be further avoided.

For example, in order to ensure the connection safety, before the first connection point is connected to the ground wire of the electrical equipment and the second connection point is connected to the ground point of the public power grid, for example, the first connection point and the second connection point may be insulated to avoid the potential safety hazard caused by the leakage of the electrical conductor in the circuit.

For example, after the first connection point and the second connection point are formed, for example, resistance values at the two connection points may also be measured, and in the case where the resistance values at the two connection points are zero or a value close to 0, it may be indicated that there is no point of breakage of the conductive layer of the wire.

According to an embodiment of the present disclosure, in the case where the conductive layer is connected to a ground point of a public power grid, the embodiment can determine whether the first insulating layer in the electric wire is aged or broken by measuring the voltage. For example, in the case of household power consumption according to the grid power supply standard, if one of the two battery cells in fig. 2 or 3 is used as the live line L and the other battery cell is used as the neutral line N in the power supply state, the voltage between the live line L and the outer conductive layer is about 220V, and the voltage between the neutral line N and the outer conductive layer is about 5V, it indicates that neither the first insulating layer surrounding the live line L nor the first insulating layer surrounding the neutral line N is aged and damaged. This is because the first connection point of the conductive layer is connected to the ground line of the electric device, and the second connection point is connected to the ground point of the public power grid, the voltage between the cell serving as the live line L and the conductive layer is the voltage to ground of the cell serving as the live line L, and the voltage between the cell serving as the zero line N and the conductive layer is the voltage to ground of the cell serving as the zero line N. On the contrary, if the voltage between the live line L and the outer conductive layer is much less than 220V and close to 0V, it indicates that the first insulating layer outside the live line L is damaged due to aging. If the voltage between the zero line N and the outer conductive layer is much less than 5V and close to 0V, it indicates that the first insulating layer outside the zero line N is aged and damaged. It is understood that the voltage values 220V and 5V are only examples to facilitate understanding of the present disclosure, and the present disclosure does not limit the same. For different power utilization scenes and different regions, the voltage to ground of the live line L and the voltage to ground of the zero line N may be different, for example, in an industrial power utilization scene, the voltage to ground of the live line L may be 380V, and the voltage to ground of the zero line N may be a value greater than 5V.

The structure of the electric wire according to the embodiment of the present disclosure is further described below with reference to fig. 4 to 6, and the structure of the conductive layer is described in detail, taking the electric wire including two conductive cores described in fig. 2 as an example.

Fig. 4 schematically illustrates a structural schematic of an electrical wire according to an embodiment of the present disclosure.

As shown in fig. 4, the electric wire 400 in this embodiment includes two conductive wire cores 410, two first insulating layers 420 and two conductive layers 430, and a second insulating layer 440 wrapped around the outside of the two conductive layers 430.

Each of the two conductive layers 430 is formed of a wire mesh. Wherein the wire mesh is a mesh which is woven by a plurality of wires and has different shapes, densities and rules. In actual use, when an electric wire of an arbitrary length is cut from a coil of the electric wire, the ends of a plurality of wires are exposed at both ends of the electric wire. In the case where a three-hole socket is provided to connect to a consumer provided with a ground wire, the plurality of wires may be bundled together at both ends of the electric wire so that the wire ends of the plurality of wires are bundled and connected at both ends of the electric wire, thereby forming a first connection point 431 at one end of the electric wire and a second connection point 432 at the other end of the electric wire.

For example, when the conductive layer includes at least two, all the wires included in the at least two conductive layers may be connected at both ends of the wire. To form said first and second connection points.

According to the embodiment of the disclosure, the metal wire mesh adopted by the conductive layer can specifically adopt a net structure, and the net structure can adopt any polygonal holes such as a square hole flat mesh, a square hole twill mesh, a diamond hole mesh, a hexagonal hole mesh and a triangular hole mesh.

According to the embodiment of the present disclosure, the density of the wire mesh may be set according to actual requirements. In this embodiment, a wire mesh with a large density may be used to ensure that the current leaked due to aging in any region of the first insulating layer can flow to the conductive layer in time, and is led to the ground through the two connection points of the conductive layer and the grounding point connected to the connection points.

Illustratively, the distance between any two points of any one of the plurality of meshes in the circumferential direction of the wire mesh is not excessively larger than the wire diameter of the conductive wire core, so as to ensure that the wire mesh has a larger density. For example, the maximum value of the distance between any two points of any one mesh in the circumferential direction thereof should be not more than a predetermined multiple of the wire diameter of the conductive wire core. The predetermined multiple may be, for example, 1.2, 1.5, 1.8, 2, 2.5, 3, etc. at any value not greater than 3.

Illustratively, the wire mesh includes a plurality of meshes, and a distance between any two points of any one of the meshes in the circumferential direction thereof is, for example, smaller than or equal to a wire diameter of the conductive wire core, thereby improving the safety of the electric wire.

Fig. 5A schematically illustrates a structural schematic of an electrical wire according to another embodiment of the present disclosure. Fig. 5B schematically shows a tile structure of the conductive layer in fig. 5A.

As shown in fig. 5A, the electric wire 500 in this embodiment includes two conductive wire cores 510, two first insulating layers 520 and two conductive layers 530, and a second insulating layer 540 wrapped around the outside of the two conductive layers 530.

Illustratively, as shown in fig. 5B, each conductive layer 530 includes a metal plate 531 and a plurality of metal wires 532. The metal plate 531 is wrapped around the first insulating layer, and the material used for the metal plate 531 may be, for example, a metal material with good flexibility, so that the metal plate 531 can be bent around the first insulating layer 520. As shown in fig. 5A, after the metal plate 531 is wrapped around the first insulating layer, the plurality of wires 532 may be fixedly connected to the metal plate 531 and extend along the circumferential direction of the conductive wire core, for example.

Illustratively, the plurality of metal wires may be arranged periodically in a length direction of the conductive core, for example, and specifically may be arranged periodically along one side of the metal plate, which is parallel to a central axis of the conductive core when the metal plate is wrapped around the first insulating layer.

For example, as shown in fig. 5A, in a case where it is necessary to connect the electric device provided with the ground wire, at least two of the plurality of wires located at one end of the electric wire may be connected to form a first connection point 533, and at least two of the plurality of wires located at the other end of the electric wire may be connected to form a second connection point 534.

Illustratively, when the wire 500 includes at least two conductive layers, all metal wires at one end of the wire may be connected to form a first connection point, and all metal wires at the other end of the wire may be connected to form a second connection point. For example, if the number of the at least two conductive layers is two, the number of the metal wires of the two conductive layers at one end of the electric wire is two, and the number of the metal wires at the other end of the electric wire is two, the four metal wires at one end of the electric wire may be connected to form the first connection point, and the four metal wires at the other end of the electric wire may be connected to form the second connection point.

Fig. 6 schematically illustrates a structural view of an electric wire according to still another embodiment of the present disclosure.

As shown in fig. 6, the electric wire 600 in this embodiment includes two conductive cores 610, two first insulating layers 620 and two conductive layers 630, and a second insulating layer 640 wrapped around the outside of the two conductive layers 630.

Illustratively, as shown in fig. 6, the conductive layer 630 in this embodiment may be, for example, a coil structure formed by winding a metal wire along the outer side of the first insulating layer 620. In the case of connecting a consumer provided with a ground line, the first end 631 of the coil structure at one end of the wire may serve as the aforementioned first connection point for connecting the ground line of the consumer. The second end 632 of the coil structure at the other end of the wire may serve as the aforementioned second connection point for connecting to a ground point of the utility grid.

For example, when the wire 600 includes at least two conductive layers and the wire is used to connect to a power consumer provided with a ground line, the first ends 631 of the coil structures of the at least two conductive layers may be connected to form the first connection point, and the second ends 632 of the coil structures of the at least two conductive layers may be connected to form the second connection point.

According to the embodiment of the disclosure, in an actual use scene, the electric wire provided by the disclosure can be adopted to connect the electric equipment to a public power grid. In consideration of the fact that in some situations, a public power grid is not provided with a grounding point, or connected electric equipment is not provided with a grounding wire. In order to avoid the risk of potential safety hazards in such a case, a leakage protection switch may be provided between the utility grid and the electrical consumer, for example, to disconnect the utility grid and the electrical consumer in time if a leakage current is detected. At this time, the conductive layer of the electric wire may not need to form a connection point, but may form a connection point at the other end in the length direction and connect the connection point to a ground point of the public power grid.

Fig. 7 schematically illustrates an application scenario of a wire according to an embodiment of the present disclosure.

As shown in fig. 7, an application scenario 700 of this embodiment may include a distribution substation 710, a protection switch 720, an air switch 730, and a powered device 740.

The distribution substation 710 may provide, among other things, a utility signal. Three live and one neutral conductors can be drawn from the substation 710. The protection switch 720 may access a mains signal provided by the distribution substation 710 in, for example, a single-phase two-wire system, a two-phase three-wire system, a three-phase three-wire system, or a three-phase four-wire system to provide an electrical signal of a rated voltage to the electrical consumer 740 via the air switch 730. The air switch 730 may be, for example, a power switch in a residential dwelling, a factory, or the like. The protection switch 720 may be, for example, a leakage protector, and is configured to disconnect the electrical signal providing the rated voltage to the electrical device 740 when a residual current meeting the condition is generated in the application scenario, so as to prevent the residual current from causing harm to residents using the commercial power signal.

The electric equipment 740 may be, for example, household appliances or various processing and production equipment in a factory. For example, the home appliance may be a refrigerator, a television, a washing machine, an air conditioner, and the like. The electric equipment 740 is inserted into a socket electrically connected to the air switch 730 to receive electric current, thereby forming an electric circuit including the electric equipment 740 and the air switch 730.

Three live wires and one neutral wire led out from the distribution station 710 may be, for example, the electric wire provided by the present disclosure, in which four conductive wire cores are provided, three of the conductive wire cores are used as the three live wires, and another conductive wire core is used as the neutral wire. The second connection point of the conductive layer of the wire is connected to the ground point of the slave distribution station 710, and the first connection point is connected to the ground line of the air switch 730 or the ground line of the electric device 740.

For example, after the public power grid and the electric equipment are connected to the electric wire, if the first insulating layer outside the conductive core serving as the live wire in the electric wire provided by the present disclosure is aged and damaged, which is equivalent to the live wire overlapping the ground wire of the electric equipment, at this time, because part of the current is conducted to the ground, the protection switch 720 can detect the leakage current, so that the connection between the electric equipment 740 and the distribution station 710 can be timely disconnected, and the safety of the electric equipment is further improved.

For example, if the first insulating layer outside the conductive core serving as the live wire and the first insulating layer outside the conductive core serving as the neutral wire in the electric wire provided by the present disclosure are both aged and damaged, the two conductive cores may be indirectly connected via the conductive layer, so that a short circuit phenomenon occurs. If the short-circuit rated current is not reached due to small leakage current, a residual current can be formed by connecting the conductive layer with the grounding wire of the electric equipment, so that the protection switch 720 can timely disconnect the electric equipment 740 from the power distribution station 710, and the safety of the electric equipment is further improved.

For example, when the first insulating layer on the outer side of the conductive wire core serving as the zero line in the electric wire is aged and damaged, the conductive layer on the outer side of the conductive wire core is connected with the grounding wire of the electric equipment and the grounding point of the public power grid, so that the potential safety hazard can be avoided. However, since no residual current is generated, the conventional protection switch cannot disconnect the electric device 740 from the distribution station 710, and the user cannot know that the first insulating layer is broken without measuring voltage or resistance. In order to facilitate the user to know such an abnormal situation, the protection switch in the invention patent with application number 202010533119.0, which is applied by the applicant of the present application, may be used in this embodiment, so that when the first insulating layer outside the conductive wire core, which is only used as the zero line, is aged and damaged, the connection between the electric equipment 740 and the power distribution station 710 is broken, and the function of warning the user of the circuit abnormality is performed.

Those skilled in the art will appreciate that various combinations and/or combinations of features recited in the various embodiments and/or claims of the present disclosure can be made, even if such combinations or combinations are not expressly recited in the present disclosure. In particular, various combinations and/or combinations of the features recited in the various embodiments and/or claims of the present disclosure may be made without departing from the spirit or teaching of the present disclosure. All such combinations and/or associations are within the scope of the present disclosure.

The embodiments of the present disclosure have been described above. However, these examples are for illustrative purposes only and are not intended to limit the scope of the present disclosure. Although the embodiments are described separately above, this does not mean that the measures in the embodiments cannot be used in advantageous combination. The scope of the disclosure is defined by the appended claims and equivalents thereof. Various alternatives and modifications can be devised by those skilled in the art without departing from the scope of the present disclosure, and such alternatives and modifications are intended to be within the scope of the present disclosure.

Claims (10)

1. An electrical wire, comprising:

a conductive wire core;

a first insulating layer wrapping the outside of the conductive wire core;

a conductive layer wrapped around the outside of the first insulating layer; and

and a second insulating layer wrapping the outside of the conductive layer.

2. The electrical wire according to claim 1, wherein:

the number of the conductive wire cores, the first insulating layers and the conductive layers is at least two;

the at least two first insulating layers are correspondingly wound on the outer sides of the at least two conductive wire cores one to one respectively, and the at least two conductive layers are correspondingly wound on the outer sides of the at least two first insulating layers one to one respectively.

3. The electrical wire according to claim 1, wherein:

the number of the conductive wire cores and the number of the first insulating layers are at least two;

at least two first insulating layers are correspondingly wrapped outside the at least two conductive wire cores one by one respectively;

the conductive layer wraps around the outside of at least two of the first insulating layers.

4. The electric wire according to any one of claims 1 to 3, wherein:

the conductive layer is configured to: forming a first connection point at one end of the wire, wherein the first connection point is used for connecting a grounding wire of electric equipment; and forming a second connection point at the other end of the wire, the second connection point being for connection to a ground point of a public power grid.

5. The electrical wire according to claim 4, wherein:

the conductive layer is formed from a wire mesh comprising a plurality of wires;

wherein the plurality of wires are configured to: the first connection point is formed by connecting one end of the wire, and the second connection point is formed by connecting the other end of the wire.

6. The electrical wire according to claim 5, wherein:

the metal wire mesh is of a mesh structure, the mesh structure comprises a plurality of meshes, and the distance between any two points of any one mesh in the plurality of meshes in the circumferential direction is smaller than or equal to the wire diameter of the conductive wire core.

7. The electrical wire according to claim 4, wherein said conductive layer comprises:

a metal plate wrapped outside the first insulating layer; and

a plurality of metal wires fixedly connected with the metal plate and extending along the perimeter direction of the conductive wire core, wherein the plurality of metal wires are periodically arranged along the length direction of the conductive wire core,

wherein the wires of the plurality of wires at both ends of the wire are configured to: at least two metal wires positioned at one end of the electric wire are connected to form the first connection point, and at least two metal wires positioned at the other end of the electric wire are connected to form the second connection point.

8. The electric wire according to claim 4, wherein said conductive layer is a coil structure formed by winding a metal wire along the outside of said first insulating layer,

wherein the coil structure is configured to: a first end of the coil structure serves as the first connection point, and a second end of the coil structure serves as the second connection point.

9. The electrical wire according to any one of claims 1 to 3, further comprising at least one of:

a fibrous layer disposed between the first insulating layer and the electrically conductive layer and surrounding the first insulating layer;

a fibrous layer that is not disposed between the second insulating layer and the electrically conductive layer and that surrounds the electrically conductive layer.

10. The electrical wire according to any one of claims 1 to 3, wherein the conductive layer is made of at least one of the following materials: copper, aluminum, alloys.

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