CN215933235U - Hot melt silk envelope curve - Google Patents

Abstract

The utility model discloses a hot-melt wire covered wire which is characterized by comprising a nylon hot-melt wire layer, a polyester hot-melt wire layer, an insulating paint layer, a heat-resistant layer, a silica gel layer and a lead in sequence from outside to inside; the wire is composed of more than one group of enameled single wires, and wire cores in each enameled single wire are all aluminum wires or aluminum-magnesium alloy wires with copper plated surfaces. According to the utility model, the coppered wire core is used for replacing a pure copper wire core, so that the waste of invalid copper materials at the axis can be reduced, the copper resource is saved, and the problem of poor mechanical strength of the hollow enameled single wire can be solved; the nylon hot-melt wire and the polyester hot-melt wire layer with gradually-increased melting points are arranged on the periphery of the wire, so that the wire has self-adhesion in a certain high-temperature range, the wire is convenient to fix, and the wire can be widely applied to modern engineering; through set up silica gel layer, heat-resistant layer and insulating layer at wire and hot melt layer spare, can further strengthen the insulation protection to the sinle silk, promote the security of using.

Description

Hot melt silk envelope curve

Technical Field

The utility model relates to the technical field of wires and cables, in particular to a hot-melt-wire covered wire.

Background

The wire covered wire is an electromagnetic wire which is generally formed by wrapping a stranded wire or a single bare wire by an insulating wire, the wire is relatively low in operating temperature, good in insulating effect, good in flexibility, long in service life and wide in applicable range. Meanwhile, because the firmness of the insulating wire is relatively poor, the insulating wire is easy to crack in the bending process, if the insulating wire winding process is poor, the problems of cracking and bulging of the surface of the covered wire can occur, the phenomenon of electric leakage can occur seriously, and certain potential safety hazards exist.

On the other hand, in application, due to the skin effect, the current density of the center of the wire core in the wire rod is almost zero, in order to save cost, the inner parts of some wire cores are made into hollow structures, and copper materials with extremely low current density at the axis are extracted; however, the mechanical strength of the bare wire or the stranded wire with the structure is often reduced, and the insulating wire on the covered wire generally cannot provide effective auxiliary support for the type of wire core, so that the hollow wire core is generally applied less on the covered wire, and the cost of the wire core is higher.

In conclusion, the structure of the silk covered wire is improved, so that the production cost is reduced, and the use safety of the wire is improved.

SUMMERY OF THE UTILITY MODEL

Aiming at the problems in the prior art, the utility model provides the hot-melt-wire covered wire, which can reduce the waste of invalid copper materials at the axis, save copper resources, solve the problem of poor mechanical strength of the hollow enameled single wire, further strengthen the insulation protection of the wire core and improve the use safety.

In order to solve the technical problems, the utility model adopts a technical scheme as follows:

a thermal fuse covered wire comprises a nylon thermal fuse layer, a polyester thermal fuse layer, an insulating paint layer, a heat-resistant layer, a silica gel layer and a lead in sequence from outside to inside; the wire is composed of more than one group of enameled single wires, and each enameled single wire comprises a non-copper metal core of a copper layer from outside to inside.

As a further elaboration of the above technical solution:

in the above technical scheme, the heat-resistant layer is a mica sleeve or a polyimide film layer.

In the technical scheme, each strand of enameled single wire comprises the insulating paint layer and the wire core from outside to inside.

In the technical scheme, the wire is formed by twisting more than two strands of enameled single wires.

In the technical scheme, the thickness of the copper layer on each wire core is between 3% and 8% of the radius of each wire core.

In the technical scheme, the thickness of the copper layer on each wire core is 3.5% of the radius of each wire core.

Compared with the prior art, the utility model has the beneficial effects that: according to the utility model, the coppered wire core is used for replacing a pure copper wire core, so that the waste of invalid copper materials at the axis can be reduced, the copper resource is saved, and the problem of poor mechanical strength of the hollow enameled single wire can be solved; the nylon hot-melt wire and the polyester hot-melt wire layer with gradually-increased melting points are arranged on the periphery of the wire, so that the wire has self-adhesion in a certain high-temperature range, the wire is convenient to fix, and the wire can be widely applied to modern engineering; through set up silica gel layer, heat-resistant layer and insulating layer at wire and hot melt layer spare, can further strengthen the insulation protection to the sinle silk, promote the security of using.

Drawings

FIG. 1 is a schematic cross-sectional view of a half section in the first embodiment;

FIG. 2 is a schematic cross-sectional view of the second embodiment;

FIG. 3 is a schematic cross-sectional view of a single enamel-covered wire according to the present invention.

In the figure: 1. a nylon hot-melt layer; 2. a polyester hot-melt wire layer; 3. an insulating layer; 4. a heat-resistant layer; 5. a silica gel layer; 6. a wire; 7. coating single wires with paint; 71. insulating paint; 72. a wire core; 721. copper; 722. a non-copper metal core; H. the thickness of the copper layer; r, core radius.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The embodiments described by referring to the drawings are exemplary and intended to be used for explaining the present application and are not to be construed as limiting the present application. In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and thus should not be considered limiting. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise. In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral connections; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate. In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.

As shown in fig. 1-2, a thermal fuse covered wire, which comprises a nylon thermal fuse layer 1, a polyester thermal fuse layer 2, an insulating layer 3, a heat-resistant layer 4, a silica gel layer 5 and a lead 6 in sequence from outside to inside; the wire 6 is composed of more than one group of enameled single wires 7, and the wire core 72 of each enameled single wire 7 comprises a non-copper metal core 722 of a copper layer 721 from outside to inside.

It will be appreciated that nylon thermal fuses have a melting point of about 90 c and polyester thermal fuses have a melting point of about 110 c, which all can be transformed from a solid to a melt with self-adhesive properties at high temperature in order to lay the cable in place.

In a preferred embodiment of the present invention, the non-copper metal core 722 is an aluminum core or an aluminum magnesium alloy core, and the copper layer 721 is plated on the surface thereof.

Specifically, the heat-resistant layer 4 is a mica sleeve or a polyimide film layer.

It can be understood that the mica sleeve has a low production cost, the polyimide film has excellent physical and chemical stability and radiation resistance, and both of them have excellent heat resistance, and can protect the inner enamel covered single wire 7 well.

Specifically, each strand of enameled single wire 7 comprises an insulating varnish 71 and a wire core 72 from outside to inside.

Specifically, the lead 6 is formed by twisting more than two strands of enameled single wires 7.

When the utility model is applied, a single enameled single wire 7 or a plurality of enameled single wires 7 can be twisted to form the conducting wire 6 according to actual requirements.

Fig. 1 shows a schematic view of a structure of a wire 6 formed by an enameled single wire 7;

fig. 2 shows a schematic structure of a conductive wire 6 formed by spirally stranding three enameled single wires 7.

Specifically, the thickness H of the copper layer on each core 72 is between 3% and 8% of the radius R of each core.

As a preferred embodiment of the present invention, the thickness H of the copper layer on each core 72 is 3.5% of the radius R of each core.

In this embodiment, the core 72 is an aluminum-magnesium alloy wire with a copper 721 plated surface, the copper layer thickness H is 3.5% of the core radius R, and the cross-sectional area of the copper layer accounts for about 10% of the core cross-sectional area. According to experimental detection, the electric conductivity of the wire core is about 63% of that of a pure copper wire core, and the volume mass of the wire core is about 38% of that of the pure copper wire; therefore, under the condition of equal weight, the length of the wire core is about 2.8 times of that of a pure copper wire core, and a large amount of copper resources can be saved.

According to the utility model, the coppered wire core is used for replacing a pure copper wire core, so that the waste of invalid copper materials at the axis can be reduced, the copper resource is saved, and the problem of poor mechanical strength of the hollow enameled single wire can be solved; the nylon hot-melt wire and the polyester hot-melt wire layer with gradually-increased melting points are arranged on the periphery of the wire, so that the wire has self-adhesion in a certain high-temperature range, the wire is convenient to fix, and the wire can be widely applied to modern engineering; through set up silica gel layer, heat-resistant layer and insulating layer at wire and hot melt layer spare, can further strengthen the insulation protection to the sinle silk, promote the security of using.

The technical scope of the present invention is not limited to the above embodiments, and any modifications, equivalent variations and modifications made to the above embodiments according to the technical spirit of the present invention still fall within the technical scope of the present invention.

Claims (6)

1. A hot-melt wire covered wire is characterized by comprising a nylon hot-melt wire layer, a polyester hot-melt wire layer, an insulating paint layer, a heat-resistant layer, a silica gel layer and a lead in sequence from outside to inside; the wire is composed of more than one group of enameled single wires, and each enameled single wire is internally provided with a copper layer of non-copper metal core from outside to inside.

2. The thermal fuse covered wire according to claim 1, wherein the heat resistant layer is a mica sleeve or a polyimide film layer.

3. The thermally fused covered wire according to claim 1, wherein each enamel single wire comprises an insulating paint layer and the wire core from outside to inside.

4. The thermally fused covered wire of claim 1, wherein said wire is formed by twisting more than two strands of said enameled single wire.

5. The thermal fuse covering according to any one of claims 1-4, wherein the thickness of the copper layer on each of the cores is between 3% and 8% of the radius of each of the cores.

6. The thermal fuse covered wire according to claim 5, wherein the thickness of the copper layer on each core is 3.5% of the radius of each core.

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